Patent Grant
12235477
The disclosure relates to a deadfront for a display, and more particularly to deadfronts that having matching regions between display and non-display regions.
In one aspect, embodiments of the disclosure relates to a deadfront configured to hide a display when the display is not active are provided. The deadfront includes a substrate having a first major surface and a second major surface. The second major surface is opposite the first major surface. The deadfront also includes a neutral density filter disposed on the second major surface of the transparent substrate and an ink layer disposed on the neutral density filter. The deadfront defines at least one display region in which the deadfront transmits at least 60% of incident light and at least one non-display region in which the deadfront transmits at most 5% of incident light. A contrast sensitivity between each of the at least one display region and each of the at least one non-display region is at least 15 when the display is not active.
In another aspect, embodiments of the disclosure relates to a device including a deadfront and light source. The deadfront has a first side and a second side. The second side is opposite the first side. The deadfront includes a substrate having a first major surface and a second major surface. The first surface corresponds to the first side of the deadfront, and the second major surface is opposite the first major surface. The deadfront also includes a neutral density filter disposed on the second major surface of the transparent substrate and an ink layer disposed on the neutral density filter. The light source is disposed on the second side of the deadfront. Light having a first intensity is emitted from the light source onto the second side of the deadfront, and light transmitted through a display region of the deadfront has a second intensity. The second intensity is within 30% of the first intensity.
an article. The article includes a deadfront and a display. The deadfront has a first side and a second side in which the second side is opposite the first side. The deadfront includes a substrate having a first major surface and a second major surface. The first surface corresponds to the first side of the deadfront, and the second major surface is opposite the first major surface. The deadfront also includes a neutral density filter disposed on the second major surface of the transparent substrate and an ink layer disposed on the neutral density filter. The ink layer includes an ink having a reflection coefficient of less than 5%. The display is disposed on the second side of the deadfront, and the display has an internal reflectance of less than 5%. The ink layer defines a non-display region through which light from the display is not transmitted and absence of the ink layer defines a display region through which at least some of light from the display is transmitted.
Additional features and advantages will be set forth in the detailed description which follows, and in part will be readily apparent to those skilled in the art from that description or recognized by practicing the embodiments as described herein, including the detailed description which follows, the claims, as well as the appended drawings.
It is to be understood that both the foregoing general description and the following detailed description are merely exemplary, and are intended to provide an overview or framework to understanding the nature and character of the claims. The accompanying drawings are included to provide a further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate one or more embodiment(s), and together with the description serve to explain principles and operation of the various embodiments.
Referring generally to the figures, various embodiments of a deadfront are provided. In general, a deadfront is a structure used in a display that blocks visibility of display components, icons, graphics, etc. when the display is off, but allows display components to be easily viewed when the display is on. As will be discussed in greater detail herein, the deadfront includes a substrate upon which a neutral density filter is applied. The neutral density filter transmits a relatively high amount of light, e.g., at least 60%, at least 70%, or at least 80% of light, in such a way as to not distort any colors of the display and so as not to substantially diminish the brightness of the display. Further, an ink layer having an ink reflection coefficient within a particular range is applied to the neutral density filter so as to help create the deadfront effect.
In particular, the ink layer increases the contrast sensitivity so that a viewer cannot easily distinguish between display regions and non-display regions of the deadfront that might otherwise be noticeable on account of the high transmittance of the neutral density filter. That is, when the display is turned off, the internal reflectivity of the display could render the display regions more visible than the non-display regions to a viewer because of the high transmittance of the neutral density filter. Providing an ink layer in the non-display regions that has a suitable reflection coefficient can substantially increase the contrast sensitivity so that the human eye cannot easily distinguish between the display region and the non-display regions. Moreover, by providing a neutral density filter with a high transmittance, the deadfront does not substantially diminish the brightness of the underlying display unit. Embodiments of the deadfront discussed herein are provided by way of example and not by way of limitation.
In the embodiment depicted in
The touch interface 102 may include one or more touch sensors in order to detect one or more touch or capacitive inputs, such as due to the placement of a user's finger, stylus, or other interaction device close to or on the deadfront 106. The touch interface 102 may generally be any type of interface configured to detect changes in capacitance or other electrical parameters that may be correlated to a user input. The touch interface 102 may be operably connected to and/or in communication the circuit board 110. The touch interface 102 is configured to receive inputs from an object (e.g., location information based on a user's finger or data from the input device). The display unit 108 is configured to display one or more output images, graphics, icons, and/or videos for the electronic device 100. The display unit 108 may be substantially any type of display mechanism, such as an light emitting diode (LED) display, an organic LED (OLED) display, a liquid crystal display (LCD), plasma display, or the like.
In embodiments, the display unit 108 has an internal reflectivity based on the construction of the display unit 108. For example, a direct-lit backlight LCD display unit 108 may contain several layers in front of the light source, such as a polarizers, glass layers, thin film transistor, liquid crystal, color filter, etc. that internally reflect some of the light from the light source. In embodiments, the display unit 108 has an internal reflectivity of no more than 5%. In other embodiments, the display unit 108 has an internal reflectivity of from 0.75% to 4%.
As mentioned above, the deadfront 106 provides a decorative surface that hides any graphics, icons, displays, etc. until a backlight of the display unit 108 is activated. Further, in embodiments, the deadfront 106 provides a protective surface for the touch interface 102. As will be discussed more fully below, the deadfront 106 is constructed so as to allow for a user's interaction to be transmitted through the thickness of the deadfront 106 for detection by the touch interface 102.
Having described the general structure of the electronic device 100, the structure of the deadfront article 106 is now described. As can be seen in
In embodiments, the substrate 120 is selected to be transparent. In embodiments, a transparent substrate is one in which at least 70% of light having a wavelength from about 390 nm to about 700 nm that is incident upon the first major surface 126 is transmitted through the second major surface 128. In further embodiments of a transparent substrate, at least 80% of such light is transmitted from the first major surface 126 through the second major surface 128, and in still other embodiments, at least 90% of such light is transmitted from the first major surface 126 through the second major surface 128.
The neutral density filter 122 is disposed on the first surface 126 of the substrate 120. As used herein, a “neutral density filter” is a layer of the deadfront that reduces or modifies the intensity of all wavelengths of light in the visible spectrum substantially equally so as not to change the hue of light transmitted through the deadfront. The neutral density filter 122 is selected to be at least 60% transparent as described above with respect to the substrate 120. In other embodiments, the neutral density filter 122 is selected to be at least 70% transparent. In still other embodiments, the neutral density filter 122 is selected to be at least 80% transparent.
In embodiments, the neutral density filter 122 is a film. For example, in an embodiment, the neutral density filter is a film comprising one or more layers of a polyester, such as polyethylene terephthalate (PET). In certain embodiments, the film includes a tinting component, such as a dye, a pigment, a metallized layer, ceramic particles, carbon particles, and/or nanoparticles (e.g., vanadium dioxide). In embodiments, the tinting component is encapsulated in a laminate adhesive layer between layers of polyester. In embodiments, the film is adhered to the substrate 120 using an adhesive layer, e.g., an acrylic adhesive. In an embodiment, the neutral density filter 122 is a polyester film containing carbon particles, having a thickness of about 50 μm, and a transparency of 70%, such as Prestige 70 (available from 3M, St. Paul, MN).
In other embodiments, the neutral density filter 122 is an ink coating. In embodiments, the neutral density filter 122 is printed onto the substrate 120. In embodiments, the ink coating is printed onto the substrate using screen printing, inject printing, spin coating, and various lithographic techniques, among others. In embodiments, the ink coating comprises dyes and/or pigments. Further, in embodiments, the ink coating is CYMK neutral black having an L* of from 50 to 90 according to the CIE L*a*b* color space.
The neutral density filter 122 is selected so as to be a level of gray or black. In embodiments, with reference to the CIE L*a*b* color space, the neutral density filter is selected such that a*=b*=0 and L*<50. In other embodiments, the neutral density filter is selected such that a*=b*=0 and L*<60, and in still other embodiments, the neutral density filter is selected such that a*=b*=0 and L*<75.
Disposed on the neutral density filter 122 is the ink layer 124. As will be discussed more fully below, the ink layer 124 is selected based on its reflection coefficient. In embodiments, the reflection coefficient of the ink used in the ink layer 124 is between 0.1% and 5%. In a further embodiment, the ink reflection coefficient is from 1% to 4%. The ink layer 124 is an opaque layer (i.e., transmittance of visible light of <5%, or preferably, a transmittance of 0%) that blocks visibility of any components beneath the deadfront 106 in these regions. For example, the ink layer 124 may be used to block visibility of connections to the display unit 108 below the deadfront 106, a border of the display unit 108, circuitry, etc. Thus, in embodiments, the ink layer 124 is used to define a display region 132 of the deadfront 106, i.e., a region intended to be seen by a viewer when the display unit is on, and non-display regions 134 of the deadfront 106, i.e., regions not intended to be viewed by the viewer regardless of whether the display is off or on. In embodiments, the ink layer 124 is selected to have an optical density of at least 3. The ink layer 124 may be applied using screen printing, inject printing, spin coating, and various lithographic techniques, among others. In embodiments, the ink layer 124 has a thickness of from 1 μm to 20 μm. In embodiments, the ink layer 124 is also selected to be gray or black in color; however, other colors are also possible depending on the need to match any other colors in the deadfront 106.
The ink layer 124 is disposed on the neutral density filter 122 and helps to diminish the visual effect created by the internal reflectivity of the display unit 108. In this way, the ink layer 124 prevents a high contrast between display regions and non-display regions covered by the deadfront 106 so that, when viewing the second major surface 128, a viewer would not be able to distinguish between the display and non-display regions when the display is off.
Contrast sensitivity is a way to quantify how easily a human eye can distinguish between two regions of different contrasts. Contrast sensitivity as used herein in calculated according to the following formula:
CS≈RN+RI/|RD−RI|
CS is the contrast sensitivity, RN is the reflectance off the second major surface 128 of the substrate, R1 is the reflectance of the ink, and RD is the internal reflectance of the display. Exemplary representations of each of RN, RI, and RD are shown in
According to this formula, a contrast sensitivity of at least 20 is not perceptible by the average human eye. Thus, in embodiments, the deadfront 106 has a contrast sensitivity of at least 15 between display regions 132 and non-display regions 134 when the display unit 108 is off. In other embodiments, the deadfront 106 has a contrast sensitivity of at least 17 between display regions 132 and non-display regions 134 when the display unit 108 is off. In still other embodiments, the deadfront 106 has a contrast sensitivity of at least 20 between display regions 132 and non-display regions 134.
A particular contrast sensitivity is achieved by taking into account the transparency of the neutral density filter 122, the reflection coefficient of the ink in the ink layer 124, and the reflection coefficient of the display unit 108. For example,
Advantageously, a deadfront 106 constructed in the manner described does not substantially diminish the brightness of the underlying display unit 108. More particularly, by using a neutral density filter 122 with a high transmittance, the brightness of the display 108 is not substantially reduced. For example, in embodiments, the brightness of the display unit 108 as viewed from the second major surface 128 is within 40% of the brightness of the display unit 108 incident on the backside of the deadfront 106. In other embodiments, the brightness of the display unit 108 as viewed from the second major surface 128 is within 30% of the brightness of the display unit 108 incident on the backside of the deadfront 106. In other embodiments, the brightness of the display unit 108 as viewed from the second major surface 128 is within 20% of the brightness of the display unit 108 incident on the backside of the deadfront 106.
Further, in any of the various embodiments described herein, the deadfront 106 seeks to minimize any distortions to the underlying image, graphic, icon, etc. on the display unit 108 as perceived by a user of the electronic device 100 in which the deadfront 106 is incorporated. That is, colors visible to a viewer through the deadfront 106 are substantially similar to the colors output by the display unit 108 of the electronic device. With reference to the CIE L*a*b* color space, the difference in each of the L*, a*, and b* values from those values output by the display unit and those values perceived by a viewer is less than 10 in embodiments. In further embodiments, the difference for each of the L*, a*, and b* values is less than 5, and in still other embodiments, the difference for each of the L*, a*, and b* values is less than 2. Using the CIE L*a*b* color system, differences between two colors can be quantified using ΔE*ab, which can be calculated in various ways according to CIE76, CIE94, and CIE00. Using any one of the calculation methods for ΔE*ab, the color difference is less than 20 in embodiments. In further embodiments, the color difference ΔE*ab is less than 10, and in still other embodiments, the color difference ΔE*ab is less than 2.
Embodiments of the deadfront 106 disclosed herein provide several advantages. For example, the deadfront 106 allows uniform visual properties from macro to micro areas as well as tunable optical performance. Further, the deadfront 106 can be overlaid on any bright display with minimal change of the electronic device's functions and attributes, such as touch functionality, screen resolution, and color. Additionally, the deadfront 106 allows for the creation of extra functionality, such as half-mirror finish, extra switching, low-reflective neutral color, or metallic and special color effect when display(s) is(are) off. Further, in certain embodiments, the deadfront 106 is lamination ready with optical clear adhesive (OCA) to any type of display application, such as home electronics, auto-interior, medical, industrial device control and displays, etc. Moreover, standard industrial coating processes are utilized in constructing the deadfront 106, which allows for ease in scaling for mass production.
Referring to
As shown in
Curved deadfront 2000 includes a polymer layer 2020 located along an inner, major surface of curved outer glass layer 2010. Curved deadfront 2000 also includes metal layer 2030. Still further, curved deadfront 2000 may also include any of the other layers described above, such as the surface treatment, the ink layer, and the optically clear adhesive. Additionally, curved deadfront 2000 may include such layers as, e.g., high optical density layers, light guide layers, reflector layers, display module(s), display stack layers, light sources, etc. that otherwise may be associated with an electronic device as discussed herein.
As will be discussed in more detail below, in various embodiments, curved deadfront 2000 including glass layer 2010, polymer layer 2020, metal layer 2030, and any other optional layers may be cold-formed together to a curved shape, as shown in
Referring to
As shown in
In one or more embodiments, outer glass layer 2010 has a thickness (t) that is in a range from 0.05 mm to 2 mm. In various embodiments, outer glass layer 2010 has a thickness (t) that is about 1.5 mm or less. For example, the thickness may be in a range from about 0.1 mm to about 1.5 mm, from about 0.15 mm to about 1.5 mm, from about 0.2 mm to about 1.5 mm, from about 0.25 mm to about 1.5 mm, from about 0.3 mm to about 1.5 mm, from about 0.35 mm to about 1.5 mm, from about 0.4 mm to about 1.5 mm, from about 0.45 mm to about 1.5 mm, from about 0.5 mm to about 1.5 mm, from about 0.55 mm to about 1.5 mm, from about 0.6 mm to about 1.5 mm, from about 0.65 mm to about 1.5 mm, from about 0.7 mm to about 1.5 mm, from about 0.1 mm to about 1.4 mm, from about 0.1 mm to about 1.3 mm, from about 0.1 mm to about 1.2 mm, from about 0.1 mm to about 1.1 mm, from about 0.1 mm to about 1.05 mm, from about 0.1 mm to about 1 mm, from about 0.1 mm to about 0.95 mm, from about 0.1 mm to about 0.9 mm, from about 0.1 mm to about 0.85 mm, from about 0.1 mm to about 0.8 mm, from about 0.1 mm to about 0.75 mm, from about 0.1 mm to about 0.7 mm, from about 0.1 mm to about 0.65 mm, from about 0.1 mm to about 0.6 mm, from about 0.1 mm to about 0.55 mm, from about 0.1 mm to about 0.5 mm, from about 0.1 mm to about 0.4 mm, or from about 0.3 mm to about 0.7 mm.
In one or more embodiments, outer glass layer 2010 has a width (W) in a range from about 5 cm to about 250 cm, from about 10 cm to about 250 cm, from about 15 cm to about 250 cm, from about 20 cm to about 250 cm, from about 25 cm to about 250 cm, from about 30 cm to about 250 cm, from about 35 cm to about 250 cm, from about 40 cm to about 250 cm, from about 45 cm to about 250 cm, from about 50 cm to about 250 cm, from about 55 cm to about 250 cm, from about 60 cm to about 250 cm, from about 65 cm to about 250 cm, from about 70 cm to about 250 cm, from about 75 cm to about 250 cm, from about 80 cm to about 250 cm, from about 85 cm to about 250 cm, from about 90 cm to about 250 cm, from about 95 cm to about 250 cm, from about 100 cm to about 250 cm, from about 110 cm to about 250 cm, from about 120 cm to about 250 cm, from about 130 cm to about 250 cm, from about 140 cm to about 250 cm, from about 150 cm to about 250 cm, from about 5 cm to about 240 cm, from about 5 cm to about 230 cm, from about 5 cm to about 220 cm, from about 5 cm to about 210 cm, from about 5 cm to about 200 cm, from about 5 cm to about 190 cm, from about 5 cm to about 180 cm, from about 5 cm to about 170 cm, from about 5 cm to about 160 cm, from about 5 cm to about 150 cm, from about 5 cm to about 140 cm, from about 5 cm to about 130 cm, from about 5 cm to about 120 cm, from about 5 cm to about 110 cm, from about 5 cm to about 100 cm, from about 5 cm to about 90 cm, from about 5 cm to about 80 cm, or from about 5 cm to about 75 cm.
In one or more embodiments, outer glass layer 2010 has a length (L) in a range from about 5 cm to about 250 cm, from about 10 cm to about 250 cm, from about 15 cm to about 250 cm, from about 20 cm to about 250 cm, from about 25 cm to about 250 cm, from about 30 cm to about 250 cm, from about 35 cm to about 250 cm, from about 40 cm to about 250 cm, from about 45 cm to about 250 cm, from about 50 cm to about 250 cm, from about 55 cm to about 250 cm, from about 60 cm to about 250 cm, from about 65 cm to about 250 cm, from about 70 cm to about 250 cm, from about 75 cm to about 250 cm, from about 80 cm to about 250 cm, from about 85 cm to about 250 cm, from about 90 cm to about 250 cm, from about 95 cm to about 250 cm, from about 100 cm to about 250 cm, from about 110 cm to about 250 cm, from about 120 cm to about 250 cm, from about 130 cm to about 250 cm, from about 140 cm to about 250 cm, from about 150 cm to about 250 cm, from about 5 cm to about 240 cm, from about 5 cm to about 230 cm, from about 5 cm to about 220 cm, from about 5 cm to about 210 cm, from about 5 cm to about 200 cm, from about 5 cm to about 190 cm, from about 5 cm to about 180 cm, from about 5 cm to about 170 cm, from about 5 cm to about 160 cm, from about 5 cm to about 150 cm, from about 5 cm to about 140 cm, from about 5 cm to about 130 cm, from about 5 cm to about 120 cm, from about 5 cm to about 110 cm, from about 5 cm to about 100 cm, from about 5 cm to about 90 cm, from about 5 cm to about 80 cm, or from about 5 cm to about 75 cm.
As shown in
In specific embodiments, outer glass layer 2010 is shaped to the curved shape shown in
In some such embodiments in which outer glass layer 2010 is unstrengthened, the first major surface 2050 and the second major surface 2060 exhibit no appreciable compressive stress, prior to cold-forming. In some such embodiments in which outer glass layer 2010 is strengthened (as described herein), the first major surface 2050 and the second major surface 2060 exhibit substantially equal compressive stress with respect to one another, prior to cold-forming. In one or more embodiments, after cold-forming the compressive stress on the second major surface 2060 (e.g., the concave surface following bending) increases (i.e., the compressive stress on the second major surface 2050 is greater after cold-forming than before cold-forming).
Without being bound by theory, the cold-forming process increases the compressive stress of the glass article being shaped to compensate for tensile stresses imparted during bending and/or forming operations. In one or more embodiments, the cold-forming process causes the second major surface 2060 to experience compressive stresses, while the first major surface 2050 (e.g., the convex surface following bending) experiences tensile stresses. The tensile stress experienced by surface 2050 following bending results in a net decrease in surface compressive stress, such that the compressive stress in surface 2050 of a strengthened glass sheet following bending is less than the compressive stress in surface 2050 when the glass sheet is flat.
Further, when a strengthened glass sheet is utilized for outer glass layer 2010, the first major surface and the second major surface (2050, 2060) are already under compressive stress, and thus first major surface 2050 can experience greater tensile stress during bending without risking fracture. This allows for the strengthened embodiments of outer glass layer 2010 to conform to more tightly curved surfaces (e.g., shaped to have smaller R1 values).
In various embodiments, the thickness of outer glass layer 2010 is tailored to allow outer glass layer 2010 to be more flexible to achieve the desired radius of curvature. Moreover, a thinner outer glass layer 2010 may deform more readily, which could potentially compensate for shape mismatches and gaps that may be created by the shape of a support or frame (as discussed below). In one or more embodiments, a thin and strengthened outer glass layer 2010 exhibits greater flexibility especially during cold-forming. The greater flexibility of the glass articles discussed herein may allow for consistent bend formation without heating.
In various embodiments, outer glass layer 2010 (and consequently deadfront 2000) may have a compound curve including a major radius and a cross curvature. A complexly curved cold-formed outer glass layer 2010 may have a distinct radius of curvature in two independent directions. According to one or more embodiments, the complexly curved cold-formed outer glass layer 2010 may thus be characterized as having “cross curvature,” where the cold-formed outer glass layer 2010 is curved along an axis (i.e., a first axis) that is parallel to a given dimension and also curved along an axis (i.e., a second axis) that is perpendicular to the same dimension. The curvature of the cold-formed outer glass layer 2010 can be even more complex when a significant minimum radius is combined with a significant cross curvature, and/or depth of bend.
Referring to
In various embodiments, the systems and methods described herein allow for formation of deadfront structure 2000 to conform to a wide variety of curved shapes that frame 2110 may have. As shown in
In one or more embodiments, deadfront structure 2000 (and specifically outer glass layer 2010) is shaped to have a first radius of curvature, R1, of about 60 mm or greater. For example, R1 may be in a range from about 60 mm to about 1500 mm, from about 70 mm to about 1500 mm, from about 80 mm to about 1500 mm, from about 90 mm to about 1500 mm, from about 100 mm to about 1500 mm, from about 120 mm to about 1500 mm, from about 140 mm to about 1500 mm, from about 150 mm to about 1500 mm, from about 160 mm to about 1500 mm, from about 180 mm to about 1500 mm, from about 200 mm to about 1500 mm, from about 220 mm to about 1500 mm, from about 240 mm to about 1500 mm, from about 250 mm to about 1500 mm, from about 260 mm to about 1500 mm, from about 270 mm to about 1500 mm, from about 280 mm to about 1500 mm, from about 290 mm to about 1500 mm, from about 300 mm to about 1500 mm, from about 350 mm to about 1500 mm, from about 400 mm to about 1500 mm, from about 450 mm to about 1500 mm, from about 500 mm to about 1500 mm, from about 550 mm to about 1500 mm, from about 600 mm to about 1500 mm, from about 650 mm to about 1500 mm, from about 700 mm to about 1500 mm, from about 750 mm to about 1500 mm, from about 800 mm to about 1500 mm, from about 900 mm to about 1500 mm, from about 9500 mm to about 1500 mm, from about 1000 mm to about 1500 mm, from about 1250 mm to about 1500 mm, from about 60 mm to about 1400 mm, from about 60 mm to about 1300 mm, from about 60 mm to about 1200 mm, from about 60 mm to about 1100 mm, from about 60 mm to about 1000 mm, from about 60 mm to about 950 mm, from about 60 mm to about 900 mm, from about 60 mm to about 850 mm, from about 60 mm to about 800 mm, from about 60 mm to about 750 mm, from about 60 mm to about 700 mm, from about 60 mm to about 650 mm, from about 60 mm to about 600 mm, from about 60 mm to about 550 mm, from about 60 mm to about 500 mm, from about 60 mm to about 450 mm, from about 60 mm to about 400 mm, from about 60 mm to about 350 mm, from about 60 mm to about 300 mm, or from about 60 mm to about 250 mm.
In one or more embodiments, support surface 2130 has a second radius of curvature of about 60 mm or greater. For example, the second radius of curvature of support surface 2130 may be in a range from about 60 mm to about 1500 mm, from about 70 mm to about 1500 mm, from about 80 mm to about 1500 mm, from about 90 mm to about 1500 mm, from about 100 mm to about 1500 mm, from about 120 mm to about 1500 mm, from about 140 mm to about 1500 mm, from about 150 mm to about 1500 mm, from about 160 mm to about 1500 mm, from about 180 mm to about 1500 mm, from about 200 mm to about 1500 mm, from about 220 mm to about 1500 mm, from about 240 mm to about 1500 mm, from about 250 mm to about 1500 mm, from about 260 mm to about 1500 mm, from about 270 mm to about 1500 mm, from about 280 mm to about 1500 mm, from about 290 mm to about 1500 mm, from about 300 mm to about 1500 mm, from about 350 mm to about 1500 mm, from about 400 mm to about 1500 mm, from about 450 mm to about 1500 mm, from about 500 mm to about 1500 mm, from about 550 mm to about 1500 mm, from about 600 mm to about 1500 mm, from about 650 mm to about 1500 mm, from about 700 mm to about 1500 mm, from about 750 mm to about 1500 mm, from about 800 mm to about 1500 mm, from about 900 mm to about 1500 mm, from about 9500 mm to about 1500 mm, from about 1000 mm to about 1500 mm, from about 1250 mm to about 1500 mm, from about 60 mm to about 1400 mm, from about 60 mm to about 1300 mm, from about 60 mm to about 1200 mm, from about 60 mm to about 1100 mm, from about 60 mm to about 1000 mm, from about 60 mm to about 950 mm, from about 60 mm to about 900 mm, from about 60 mm to about 850 mm, from about 60 mm to about 800 mm, from about 60 mm to about 750 mm, from about 60 mm to about 700 mm, from about 60 mm to about 650 mm, from about 60 mm to about 600 mm, from about 60 mm to about 550 mm, from about 60 mm to about 500 mm, from about 60 mm to about 450 mm, from about 60 mm to about 400 mm, from about 60 mm to about 350 mm, from about 60 mm to about 300 mm, or from about 60 mm to about 250 mm.
In one or more embodiments, deadfront structure 2000 is cold-formed to exhibit a first radius curvature, R1, that is within 10% (e.g., about 10% or less, about 9% or less, about 8% or less, about 7% or less, about 6% or less, or about 5% or less) of the second radius of curvature of support surface 2130 of frame 2110. For example, support surface 2130 of frame 2110 exhibits a radius of curvature of 1000 mm, deadfront structure 2000 is cold-formed to have a radius of curvature in a range from about 900 mm to about 1100 mm.
In one or more embodiments, first major surface 2050 and/or second major surface 2060 of glass layer 2010 includes a surface treatment or a functional coating. The surface treatment may cover at least a portion of first major surface 2050 and/or second major surface 2060. Exemplary surface treatments include at least one or combinations of a glare reduction or anti-glare coating, an anti-glare surface (e.g., an etched surface), a scratch resistance coating, an anti-reflection coating, a half-mirror coating, easy-to-clean coating, or ink decoration.
Referring to
At step 2220, a force is applied to the deadfront structure while it is supported by the support causing the deadfront structure to bend into conformity with the curved shape of the support. In this manner, a curved deadfront structure 2000, as shown in
In some embodiments, the force applied in step 2220 may be air pressure applied via a vacuum fixture. In some other embodiments, the air pressure differential is formed by applying a vacuum to an airtight enclosure surrounding the frame and the deadfront structure. In specific embodiments, the airtight enclosure is a flexible polymer shell, such as a plastic bag or pouch. In other embodiments, the air pressure differential is formed by generating increased air pressure around the deadfront structure and the frame with an overpressure device, such as an autoclave. Applicant has further found that air pressure provides a consistent and highly uniform bending force (as compared to a contact-based bending method) which further leads to a robust manufacturing process. In various embodiments, the air pressure differential is between 0.5 and 1.5 atmospheres of pressure (atm), specifically between 0.7 and 1.1 atm, and more specifically is 0.8 to 1 atm.
At step 2230, the temperature of the deadfront structure is maintained below the glass transition temperature of the material of the outer glass layer during the bending. As such, method 2200 is a cold-forming or cold-bending process. In particular embodiments, the temperature of the deadfront structure is maintained below 500 degrees C., 400 degrees C., 300 degrees C., 200 degrees C. or 100 degrees C. In a particular embodiment, the deadfront structure is maintained at or below room temperature during bending. In a particular embodiment, the deadfront structure is not actively heated via a heating element, furnace, oven, etc. during bending, as is the case when hot-forming glass to a curved shape.
As noted above, in addition to providing processing advantages such as eliminating expensive and/or slow heating steps, the cold-forming processes discussed herein are believed to generate curved deadfront structures with a variety of properties that are believed to be superior to those achievable via hot-forming processes. For example, Applicant believes that, for at least some glass materials, heating during hot-forming processes decreases optical properties of curved glass sheets, and thus, the curved glass based deadfronts formed utilizing the cold-bending processes/systems discussed herein provide for both curved glass shape along with improved optical qualities not believed achievable with hot-bending processes.
Further, many glass coating materials (e.g., anti-glare coatings, anti-reflective coatings, etc.) are applied via deposition processes, such as sputtering processes, that are typically ill-suited for coating on to a curved surface. In addition, many coating materials, such as the polymer layer, also are not able to survive the high temperatures associated with hot-bending processes. Thus, in particular embodiments discussed herein, layer 2020 is applied to outer glass layer 2010 prior to cold-bending. Thus, Applicant believes that the processes and systems discussed herein allow for bending of glass after one or more coating material has been applied to the glass, in contrast to typical hot-forming processes.
At step 2240, the curved deadfront structure is attached or affixed to the curved support. In various embodiments, the attachment between the curved deadfront structure and the curved support may be accomplished via an adhesive material. Such adhesives may include any suitable optically clear adhesive for bonding the deadfront structure in place relative to the display assembly (e.g., to the frame of the display). In one example, the adhesive may include an optically clear adhesive available from 3M Corporation under the trade name 8215. The thickness of the adhesive may be in a range from about 200 μm to about 500 μm.
The adhesive material may be applied in a variety ways. In one embodiment, the adhesive is applied using an applicator gun and made uniform using a roller or a draw down die. In various embodiments, the adhesives discussed herein are structural adhesives. In particular embodiments, the structural adhesives may include an adhesive selected from one or more of the categories: (a) Toughened Epoxy (Masterbond EP21TDCHT-LO, 3M Scotch Weld Epoxy DP460 Off-white); (b) Flexible Epoxy (Masterbond EP21TDC-2LO, 3M Scotch Weld Epoxy 2216 B/A Gray); (c) Acrylic (LORD Adhesive 410/Accelerator 19 w/LORD AP 134 primer, LORD Adhesive 852/LORD Accelerator 25 GB, Loctite HF8000, Loctite AA4800); (d) Urethanes (3M Scotch Weld Urethane DP640 Brown); and (e) Silicones (Dow Corning 995). In some cases, structural glues available in sheet format (such as B-staged epoxy adhesives) may be utilized. Furthermore, pressure sensitive structural adhesives such as 3M VHB tapes may be utilized. In such embodiments, utilizing a pressure sensitive adhesive allows for the curved deadfront structure to be bonded to the frame without the need for a curing step.
Referring to
Glass Materials
The various glass layer(s) of the deadfront structures discussed herein, such as outer glass layer 2010, may be formed from any suitable glass composition including soda lime glass, aluminosilicate glass, borosilicate glass, boroaluminosilicate glass, alkali-containing aluminosilicate glass, alkali-containing borosilicate glass, and alkali-containing boroaluminosilicate glass.
Unless otherwise specified, the glass compositions disclosed herein are described in mole percent (mol %) as analyzed on an oxide basis.
In one or more embodiments, the glass composition may include SiO2 in an amount in a range from about 66 mol % to about 80 mol %, from about 67 mol % to about 80 mol %, from about 68 mol % to about 80 mol %, from about 69 mol % to about 80 mol %, from about 70 mol % to about 80 mol %, from about 72 mol % to about 80 mol %, from about 65 mol % to about 78 mol %, from about 65 mol % to about 76 mol %, from about 65 mol % to about 75 mol %, from about 65 mol % to about 74 mol %, from about 65 mol % to about 72 mol %, or from about 65 mol % to about 70 mol %, and all ranges and sub-ranges therebetween.
In one or more embodiments, the glass composition includes Al2O3 in an amount greater than about 4 mol %, or greater than about 5 mol %. In one or more embodiments, the glass composition includes Al2O3 in a range from greater than about 7 mol % to about 15 mol %, from greater than about 7 mol % to about 14 mol %, from about 7 mol % to about 13 mol %, from about 4 mol % to about 12 mol %, from about 7 mol % to about 11 mol %, from about 8 mol % to about 15 mol %, from 9 mol % to about 15 mol %, from about 9 mol % to about 15 mol %, from about 10 mol % to about 15 mol %, from about 11 mol % to about 15 mol %, or from about 12 mol % to about 15 mol %, and all ranges and sub-ranges therebetween. In one or more embodiments, the upper limit of Al2O3 may be about 14 mol %, 14.2 mol %, 14.4 mol %, 14.6 mol %, or 14.8 mol %.
In one or more embodiments, glass layer(s) herein are described as an aluminosilicate glass article or including an aluminosilicate glass composition. In such embodiments, the glass composition or article formed therefrom includes SiO2 and Al2O3 and is not a soda lime silicate glass. In this regard, the glass composition or article formed therefrom includes Al2O3 in an amount of about 2 mol % or greater, 2.25 mol % or greater, 2.5 mol % or greater, about 2.75 mol % or greater, about 3 mol % or greater.
In one or more embodiments, the glass composition comprises B2O3 (e.g., about 0.01 mol % or greater). In one or more embodiments, the glass composition comprises B2O3 in an amount in a range from about 0 mol % to about 5 mol %, from about 0 mol % to about 4 mol %, from about 0 mol % to about 3 mol %, from about 0 mol % to about 2 mol %, from about 0 mol % to about 1 mol %, from about 0 mol % to about 0.5 mol %, from about 0.1 mol % to about 5 mol %, from about 0.1 mol % to about 4 mol %, from about 0.1 mol % to about 3 mol %, from about 0.1 mol % to about 2 mol %, from about 0.1 mol % to about 1 mol %, from about 0.1 mol % to about 0.5 mol %, and all ranges and sub-ranges therebetween. In one or more embodiments, the glass composition is substantially free of B2O3.
As used herein, the phrase “substantially free” with respect to the components of the composition means that the component is not actively or intentionally added to the composition during initial batching, but may be present as an impurity in an amount less than about 0.001 mol %.
In one or more embodiments, the glass composition optionally comprises P2O5 (e.g., about 0.01 mol % or greater). In one or more embodiments, the glass composition comprises a non-zero amount of P2O5 up to and including 2 mol %, 1.5 mol %, 1 mol %, or 0.5 mol %. In one or more embodiments, the glass composition is substantially free of P2O5.
In one or more embodiments, the glass composition may include a total amount of R2O (which is the total amount of alkali metal oxide such as Li2O, Na2O, K2O, Rb2O, and Cs2O) that is greater than or equal to about 8 mol %, greater than or equal to about 10 mol %, or greater than or equal to about 12 mol %. In some embodiments, the glass composition includes a total amount of R2O in a range from about 8 mol % to about 20 mol %, from about 8 mol % to about 18 mol %, from about 8 mol % to about 16 mol %, from about 8 mol % to about 14 mol %, from about 8 mol % to about 12 mol %, from about 9 mol % to about 20 mol %, from about 10 mol % to about 20 mol %, from about 11 mol % to about 20 mol %, from about 12 mol % to about 20 mol %, from about 13 mol % to about 20 mol %, from about 10 mol % to about 14 mol %, or from 11 mol % to about 13 mol %, and all ranges and sub-ranges therebetween. In one or more embodiments, the glass composition may be substantially free of Rb2O, Cs2O or both Rb2O and Cs2O. In one or more embodiments, the R2O may include the total amount of Li2O, Na2O and K2O only. In one or more embodiments, the glass composition may comprise at least one alkali metal oxide selected from Li2O, Na2O and K2O, wherein the alkali metal oxide is present in an amount greater than about 8 mol % or greater.
In one or more embodiments, the glass composition comprises Na2O in an amount greater than or equal to about 8 mol %, greater than or equal to about 10 mol %, or greater than or equal to about 12 mol %. In one or more embodiments, the composition includes Na2O in a range from about from about 8 mol % to about 20 mol %, from about 8 mol % to about 18 mol %, from about 8 mol % to about 16 mol %, from about 8 mol % to about 14 mol %, from about 8 mol % to about 12 mol %, from about 9 mol % to about 20 mol %, from about 10 mol % to about 20 mol %, from about 11 mol % to about 20 mol %, from about 12 mol % to about 20 mol %, from about 13 mol % to about 20 mol %, from about 10 mol % to about 14 mol %, or from 11 mol % to about 16 mol %, and all ranges and sub-ranges therebetween.
In one or more embodiments, the glass composition includes less than about 4 mol % K2O, less than about 3 mol % K2O, or less than about 1 mol % K2O. In some instances, the glass composition may include K2O in an amount in a range from about 0 mol % to about 4 mol %, from about 0 mol % to about 3.5 mol %, from about 0 mol % to about 3 mol %, from about 0 mol % to about 2.5 mol %, from about 0 mol % to about 2 mol %, from about 0 mol % to about 1.5 mol %, from about 0 mol % to about 1 mol %, from about 0 mol % to about 0.5 mol %, from about 0 mol % to about 0.2 mol %, from about 0 mol % to about 0.1 mol %, from about 0.5 mol % to about 4 mol %, from about 0.5 mol % to about 3.5 mol %, from about 0.5 mol % to about 3 mol %, from about 0.5 mol % to about 2.5 mol %, from about 0.5 mol % to about 2 mol %, from about 0.5 mol % to about 1.5 mol %, or from about 0.5 mol % to about 1 mol %, and all ranges and sub-ranges therebetween. In one or more embodiments, the glass composition may be substantially free of K2O.
In one or more embodiments, the glass composition is substantially free of Li2O.
In one or more embodiments, the amount of Na2O in the composition may be greater than the amount of Li2O. In some instances, the amount of Na2O may be greater than the combined amount of Li2O and K2O. In one or more alternative embodiments, the amount of Li2O in the composition may be greater than the amount of Na2O or the combined amount of Na2O and K2O.
In one or more embodiments, the glass composition may include a total amount of RO (which is the total amount of alkaline earth metal oxide such as CaO, MgO, BaO, ZnO and SrO) in a range from about 0 mol % to about 2 mol %. In some embodiments, the glass composition includes a non-zero amount of RO up to about 2 mol %. In one or more embodiments, the glass composition comprises RO in an amount from about 0 mol % to about 1.8 mol %, from about 0 mol % to about 1.6 mol %, from about 0 mol % to about 1.5 mol %, from about 0 mol % to about 1.4 mol %, from about 0 mol % to about 1.2 mol %, from about 0 mol % to about 1 mol %, from about 0 mol % to about 0.8 mol %, from about 0 mol % to about 0.5 mol %, and all ranges and sub-ranges therebetween.
In one or more embodiments, the glass composition includes CaO in an amount less than about 1 mol %, less than about 0.8 mol %, or less than about 0.5 mol %. In one or more embodiments, the glass composition is substantially free of CaO. In some embodiments, the glass composition comprises MgO in an amount from about 0 mol % to about 7 mol %, from about 0 mol % to about 6 mol %, from about 0 mol % to about 5 mol %, from about 0 mol % to about 4 mol %, from about 0.1 mol % to about 7 mol %, from about 0.1 mol % to about 6 mol %, from about 0.1 mol % to about 5 mol %, from about 0.1 mol % to about 4 mol %, from about 1 mol % to about 7 mol %, from about 2 mol % to about 6 mol %, or from about 3 mol % to about 6 mol %, and all ranges and sub-ranges therebetween.
In one or more embodiments, the glass composition comprises ZrO2 in an amount equal to or less than about 0.2 mol %, less than about 0.18 mol %, less than about 0.16 mol %, less than about 0.15 mol %, less than about 0.14 mol %, less than about 0.12 mol %. In one or more embodiments, the glass composition comprises ZrO2 in a range from about 0.01 mol % to about 0.2 mol %, from about 0.01 mol % to about 0.18 mol %, from about 0.01 mol % to about 0.16 mol %, from about 0.01 mol % to about 0.15 mol %, from about 0.01 mol % to about 0.14 mol %, from about 0.01 mol % to about 0.12 mol %, or from about 0.01 mol % to about 0.10 mol %, and all ranges and sub-ranges therebetween.
In one or more embodiments, the glass composition comprises SnO2 in an amount equal to or less than about 0.2 mol %, less than about 0.18 mol %, less than about 0.16 mol %, less than about 0.15 mol %, less than about 0.14 mol %, less than about 0.12 mol %. In one or more embodiments, the glass composition comprises SnO2 in a range from about 0.01 mol % to about 0.2 mol %, from about 0.01 mol % to about 0.18 mol %, from about 0.01 mol % to about 0.16 mol %, from about 0.01 mol % to about 0.15 mol %, from about 0.01 mol % to about 0.14 mol %, from about 0.01 mol % to about 0.12 mol %, or from about 0.01 mol % to about 0.10 mol %, and all ranges and sub-ranges therebetween.
In one or more embodiments, the glass composition may include an oxide that imparts a color or tint to the glass articles. In some embodiments, the glass composition includes an oxide that prevents discoloration of the glass article when the glass article is exposed to ultraviolet radiation. Examples of such oxides include, without limitation oxides of: Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Ce, W, and Mo.
In one or more embodiments, the glass composition includes Fe expressed as Fe2O3, wherein Fe is present in an amount up to (and including) about 1 mol %. In some embodiments, the glass composition is substantially free of Fe. In one or more embodiments, the glass composition comprises Fe2O3 in an amount equal to or less than about 0.2 mol %, less than about 0.18 mol %, less than about 0.16 mol %, less than about 0.15 mol %, less than about 0.14 mol %, less than about 0.12 mol %. In one or more embodiments, the glass composition comprises Fe2O3 in a range from about 0.01 mol % to about 0.2 mol %, from about 0.01 mol % to about 0.18 mol %, from about 0.01 mol % to about 0.16 mol %, from about 0.01 mol % to about 0.15 mol %, from about 0.01 mol % to about 0.14 mol %, from about 0.01 mol % to about 0.12 mol %, or from about 0.01 mol % to about 0.10 mol %, and all ranges and sub-ranges therebetween.
Where the glass composition includes TiO2, TiO2 may be present in an amount of about 5 mol % or less, about 2.5 mol % or less, about 2 mol % or less or about 1 mol % or less. In one or more embodiments, the glass composition may be substantially free of TiO2.
An exemplary glass composition includes SiO2 in an amount in a range from about 65 mol % to about 75 mol %, Al2O3 in an amount in a range from about 8 mol % to about 14 mol %, Na2O in an amount in a range from about 12 mol % to about 17 mol %, K2O in an amount in a range of about 0 mol % to about 0.2 mol %, and MgO in an amount in a range from about 1.5 mol % to about 6 mol %. Optionally, SnO2 may be included in the amounts otherwise disclosed herein.
Strengthened Glass Properties
In one or more embodiments, outer glass layer 2010 or other glass layer of any of the deadfront embodiments discussed herein may be formed from a strengthened glass sheet or article. In one or more embodiments, the glass articles used to form the layer(s) of the deadfront structures discussed herein may be strengthened to include compressive stress that extends from a surface to a depth of compression (DOC). The compressive stress regions are balanced by a central portion exhibiting a tensile stress. At the DOC, the stress crosses from a positive (compressive) stress to a negative (tensile) stress.
In one or more embodiments, the glass articles used to form the layer(s) of the deadfront structures discussed herein may be strengthened mechanically by utilizing a mismatch of the coefficient of thermal expansion between portions of the glass to create a compressive stress region and a central region exhibiting a tensile stress. In some embodiments, the glass article may be strengthened thermally by heating the glass to a temperature above the glass transition point and then rapidly quenching.
In one or more embodiments, the glass articles used to form the layer(s) of the deadfront structures discussed herein may be chemically strengthening by ion exchange. In the ion exchange process, ions at or near the surface of the glass article are replaced by—or exchanged with—larger ions having the same valence or oxidation state. In those embodiments in which the glass article comprises an alkali aluminosilicate glass, ions in the surface layer of the article and the larger ions are monovalent alkali metal cations, such as Li+, Na+, K+, Rb+, and Cs+. Alternatively, monovalent cations in the surface layer may be replaced with monovalent cations other than alkali metal cations, such as Ag+ or the like. In such embodiments, the monovalent ions (or cations) exchanged into the glass article generate a stress.
Ion exchange processes are typically carried out by immersing a glass article in a molten salt bath (or two or more molten salt baths) containing the larger ions to be exchanged with the smaller ions in the glass article. It should be noted that aqueous salt baths may also be utilized. In addition, the composition of the bath(s) may include more than one type of larger ion (e.g., Na+ and K+) or a single larger ion. It will be appreciated by those skilled in the art that parameters for the ion exchange process, including, but not limited to, bath composition and temperature, immersion time, the number of immersions of the glass article in a salt bath (or baths), use of multiple salt baths, additional steps such as annealing, washing, and the like, are generally determined by the composition of the glass layer(s) of a deadfront structure (including the structure of the article and any crystalline phases present) and the desired DOC and CS of the glass layer(s) of a deadfront structure that results from strengthening.
Exemplary molten bath composition may include nitrates, sulfates, and chlorides of the larger alkali metal ion. Typical nitrates include KNO3, NaNO3, LiNO3, NaSO4 and combinations thereof. The temperature of the molten salt bath typically is in a range from about 380° C. up to about 450° C., while immersion times range from about 15 minutes up to about 100 hours depending on the glass thickness, bath temperature and glass (or monovalent ion) diffusivity. However, temperatures and immersion times different from those described above may also be used.
In one or more embodiments, the glass articles used to form the layer(s) of the deadfront structures may be immersed in a molten salt bath of 100% NaNO3, 100% KNO3, or a combination of NaNO3 and KNO3 having a temperature from about 370° C. to about 480° C. In some embodiments, the glass layer(s) of a deadfront structure may be immersed in a molten mixed salt bath including from about 5% to about 90% KNO3 and from about 10% to about 95% NaNO3. In one or more embodiments, the glass article may be immersed in a second bath, after immersion in a first bath. The first and second baths may have different compositions and/or temperatures from one another. The immersion times in the first and second baths may vary. For example, immersion in the first bath may be longer than the immersion in the second bath.
In one or more embodiments, the glass articles used to form the layer(s) of the deadfront structures may be immersed in a molten, mixed salt bath including NaNO3 and KNO3 (e.g., 49%/51%, 50%/50%, 51%/49%) having a temperature less than about 420° C. (e.g., about 400° C. or about 380° C.). for less than about 5 hours, or even about 4 hours or less.
Ion exchange conditions can be tailored to provide a “spike” or to increase the slope of the stress profile at or near the surface of the resulting glass layer(s) of a deadfront structure. The spike may result in a greater surface CS value. This spike can be achieved by single bath or multiple baths, with the bath(s) having a single composition or mixed composition, due to the unique properties of the glass compositions used in the glass layer(s) of a deadfront structure described herein.
In one or more embodiments, where more than one monovalent ion is exchanged into the glass articles used to form the layer(s) of the deadfront structures, the different monovalent ions may exchange to different depths within the glass layer (and generate different magnitudes stresses within the glass article at different depths). The resulting relative depths of the stress-generating ions can be determined and cause different characteristics of the stress profile.
CS is measured using those means known in the art, such as by surface stress meter (FSM) using commercially available instruments such as the FSM-6000, manufactured by Orihara Industrial Co., Ltd. (Japan). Surface stress measurements rely upon the accurate measurement of the stress optical coefficient (SOC), which is related to the birefringence of the glass. SOC in turn is measured by those methods that are known in the art, such as fiber and four point bend methods, both of which are described in ASTM standard C770-98 (2013), entitled “Standard Test Method for Measurement of Glass Stress-Optical Coefficient,” the contents of which are incorporated herein by reference in their entirety, and a bulk cylinder method. As used herein CS may be the “maximum compressive stress” which is the highest compressive stress value measured within the compressive stress layer. In some embodiments, the maximum compressive stress is located at the surface of the glass article. In other embodiments, the maximum compressive stress may occur at a depth below the surface, giving the compressive profile the appearance of a “buried peak.”
DOC may be measured by FSM or by a scattered light polariscope (SCALP) (such as the SCALP-04 scattered light polariscope available from Glasstress Ltd., located in Tallinn Estonia), depending on the strengthening method and conditions. When the glass article is chemically strengthened by an ion exchange treatment, FSM or SCALP may be used depending on which ion is exchanged into the glass article. Where the stress in the glass article is generated by exchanging potassium ions into the glass article, FSM is used to measure DOC. Where the stress is generated by exchanging sodium ions into the glass article, SCALP is used to measure DOC. Where the stress in the glass article is generated by exchanging both potassium and sodium ions into the glass, the DOC is measured by SCALP, since it is believed the exchange depth of sodium indicates the DOC and the exchange depth of potassium ions indicates a change in the magnitude of the compressive stress (but not the change in stress from compressive to tensile); the exchange depth of potassium ions in such glass articles is measured by FSM. Central tension or CT is the maximum tensile stress and is measured by SCALP.
In one or more embodiments, the glass articles used to form the layer(s) of the deadfront structures maybe strengthened to exhibit a DOC that is described a fraction of the thickness t of the glass article (as described herein). For example, in one or more embodiments, the DOC may be equal to or greater than about 0.05 t, equal to or greater than about 0.1 t, equal to or greater than about 0.11 t, equal to or greater than about 0.12 t, equal to or greater than about 0.13 t, equal to or greater than about 0.14 t, equal to or greater than about 0.15 t, equal to or greater than about 0.16 t, equal to or greater than about 0.17 t, equal to or greater than about 0.18 t, equal to or greater than about 0.19 t, equal to or greater than about 0.2 t, equal to or greater than about 0.21 t. In some embodiments, The DOC may be in a range from about 0.08 t to about 0.25 t, from about 0.09 t to about 0.25 t, from about 0.18 t to about 0.25 t, from about 0.11 t to about 0.25 t, from about 0.12 t to about 0.25 t, from about 0.13 t to about 0.25 t, from about 0.14 t to about 0.25 t, from about 0.15 t to about 0.25 t, from about 0.08 t to about 0.24 t, from about 0.08 t to about 0.23 t, from about 0.08 t to about 0.22 t, from about 0.08 t to about 0.21 t, from about 0.08 t to about 0.2 t, from about 0.08 t to about 0.19 t, from about 0.08 t to about 0.18 t, from about 0.08 t to about 0.17 t, from about 0.08 t to about 0.16 t, or from about 0.08 t to about 0.15 t. In some instances, the DOC may be about 20 μm or less. In one or more embodiments, the DOC may be about 40 μm or greater (e.g., from about 40 μm to about 300 μm, from about 50 μm to about 300 μm, from about 60 μm to about 300 μm, from about 70 μm to about 300 μm, from about 80 μm to about 300 μm, from about 90 μm to about 300 μm, from about 100 μm to about 300 μm, from about 110 μm to about 300 μm, from about 120 μm to about 300 μm, from about 140 μm to about 300 μm, from about 150 μm to about 300 μm, from about 40 μm to about 290 μm, from about 40 μm to about 280 μm, from about 40 μm to about 260 μm, from about 40 μm to about 250 μm, from about 40 μm to about 240 μm, from about 40 μm to about 230 μm, from about 40 μm to about 220 μm, from about 40 μm to about 210 μm, from about 40 μm to about 200 μm, from about 40 μm to about 180 μm, from about 40 μm to about 160 μm, from about 40 μm to about 150 μm, from about 40 μm to about 140 μm, from about 40 μm to about 130 μm, from about 40 μm to about 120 μm, from about 40 μm to about 110 μm, or from about 40 μm to about 100 μm.
In one or more embodiments, the glass articles used to form the layer(s) of the deadfront structures may have a CS (which may be found at the surface or a depth within the glass article) of about 200 MPa or greater, 300 MPa or greater, 400 MPa or greater, about 500 MPa or greater, about 600 MPa or greater, about 700 MPa or greater, about 800 MPa or greater, about 900 MPa or greater, about 930 MPa or greater, about 1000 MPa or greater, or about 1050 MPa or greater.
In one or more embodiments, the glass articles used to form the layer(s) of the deadfront structures may have a maximum tensile stress or central tension (CT) of about 20 MPa or greater, about 30 MPa or greater, about 40 MPa or greater, about 45 MPa or greater, about 50 MPa or greater, about 60 MPa or greater, about 70 MPa or greater, about 75 MPa or greater, about 80 MPa or greater, or about 85 MPa or greater. In some embodiments, the maximum tensile stress or central tension (CT) may be in a range from about 40 MPa to about 100 MPa.
Aspect (1) of this disclosure pertains to a deadfront configured to hide a display when the display is not active, the deadfront comprising: a substrate having a first major surface and a second major surface, the second major surface being opposite the first major surface; a neutral density filter disposed on the second major surface of the transparent substrate; and an ink layer disposed on the neutral density filter; wherein the ink layer defines at least one display region in which the deadfront transmits at least 60% of incident light and at least one non-display region in which the deadfront transmits at most 5% of incident light; wherein a contrast sensitivity between each of the at least one display region and each of the at least one non-display region is at least 15 when the display is not active.
Aspect (2) pertains to the article of Aspect (1), wherein the substrate transmits at least 70% of incident light in the visible spectrum.
Aspect (3) pertains to the article of Aspect (1) or Aspect (2), wherein the substrate is a plastic that is at least one of polymethylmethacrylate, polyethylene terephthalate, cellulose triacetate, or polycarbonate.
Aspect (4) pertains to the article of Aspect (1) or Aspect (2), wherein the substrate is a glass or glass-ceramic material.
Aspect (5) pertains to the article of Aspect (1) or Aspect (2), wherein the substrate comprises at least one of soda lime glass, aluminosilicate glass, borosilicate glass, boroaluminosilicate glass, alkali-containing aluminosilicate glass, alkali-containing borosilicate glass, or alkali-containing boroaluminosilicate glass.
Aspect (6) pertains to the article of any one of Aspects (1) through (5), wherein the neutral density filter transmits up to 80% of light in the visible spectrum.
Aspect (7) pertains to the article of any one of Aspects (1) through (6), wherein the neutral density filter transmits at least 60% of light in the visible spectrum.
Aspect (8) pertains to the article of any one of Aspects (1) through (7), wherein the neutral density filter comprises a film.
Aspect (9) pertains to the article of Aspect (8), wherein the film comprises one or more polyester layers and at least one layer comprising at least one of a dye, a pigment, a metallized layer, ceramic particles, carbon particles, or nanoparticles.
Aspect (10) pertains to the article of any one of Aspects (1) through (7), wherein the neutral density filter comprises an ink coating.
Aspect (11) pertains to the article of Aspect (10), wherein the ink coating is a CYMK neutral black.
Aspect (12) pertains to the article of Aspect (10) or (11), wherein the ink coating has an L* of from 50 to 90 according to the CIE L*a*b* color space.
Aspect (13) pertains to the article of any one of Aspects (1) through (12), wherein neutral density filter is a solid color.
Aspect (14) pertains to the article of any one of Aspects (1) through (13), wherein the ink layer has an ink reflection coefficient of from 0.1% to 5%.
Aspect (15) pertains to the article of any one of Aspects (1) through (14), further comprising a surface treatment disposed on the first major surface of the substrate.
Aspect (16) pertains to the article of Aspect (15), wherein the surface treatment is at least one of antiglare, etching, antireflection coating, or durable antireflection coating.
Aspect (17) pertains to the article of any one of Aspects (1) through (16), wherein the substrate is 1 mm or less in thickness.
Aspect (18) of this disclosure pertains to a device, comprising: a deadfront having a first side and a second side, the second side being opposite the first side, the deadfront comprising: a substrate having a first major surface and a second major surface, the first surface corresponding to the first side of the deadfront and the second major surface being opposite the first major surface; a neutral density filter disposed on at least a portion of the second major surface of the transparent substrate; and an ink layer disposed on at least a portion of the neutral density filter; and a light source disposed on the second side of the deadfront; wherein light having a first intensity is emitted from the light source onto the second side of the deadfront and light transmitted through a display region of the deadfront has a second intensity, the second intensity being within 30% of the first intensity.
Aspect (19) pertains to the device of Aspect (18), wherein the neutral density filter transmits at least 70% of light in the visible spectrum.
Aspect (20) pertains to the device of Aspect (18) or (19), wherein the ink layer comprises an ink having a reflection coefficient of less than 5%.
Aspect (21) pertains to the device of any one of Aspects (18) through (20), wherein the light source is at least one of a light emitting diode (LED) display, an organic LED (OLED) display, a liquid crystal display (LCD), or a plasma display.
Aspect (22) pertains to the device of any one of Aspects (18) through (21), wherein the neutral density filter transmits up to 80% of light in the visible spectrum.
Aspect (23) pertains to the device of any one of Aspects (18) through (22), wherein the light source has an internal reflection coefficient of less than 5%.
Aspect (24) pertains to the device of any one of Aspects (18) through (23), wherein the display region of the deadfront is defined by the absence of the ink layer.
Aspect (25) pertains to the device of any one of Aspects (18) through (24), wherein the portion of the deadfront comprising the ink layer defines a non-display region and wherein the contrast sensitivity between the display region and the non-display region is at least 15.
Aspect (26) pertains to the device of any one of Aspects (18) through (25), wherein the ink layer comprises an ink having a reflection coefficient of less than 5%.
Aspect (27) pertains to the device of any one of Aspects (18) through (26), wherein the neutral density filter comprises a film.
Aspect (28) pertains to the device of Aspect (27), wherein the film comprises one or more polyester layers and at least one layer comprising at least one of a dye, a pigment, a metallized layer, ceramic particles, carbon particles, or nanoparticles.
Aspect (29) pertains to the device of any one of Aspects (18) through (26), wherein the neutral density filter comprises an ink coating.
Aspect (30) pertains to the device of Aspect (29), wherein the ink coating is a CYMK neutral black.
Aspect (31) pertains to the device of Aspect (29) or (30), wherein the ink coating has an L* of from 50 to 90 according to the CIE L*a*b* color space.
Aspect (32) pertains to the device of any one of Aspects (18) through (31), wherein the deadfront further comprises a surface treatment on the first major surface of the substrate, the surface treatment comprising at least one of antiglare, etching, antireflection coating, or durable antireflection coating.
Aspect (33) pertains to the device of any one of Aspects (18) through (32), wherein the substrate is 1 mm or less in thickness.
Aspect (34) of this disclosure pertain to an article comprising: a deadfront having a first side and a second side, the second side being opposite the first side, the deadfront comprising: a substrate having a first major surface and a second major surface, the first surface corresponding to the first side of the deadfront and the second major surface being opposite the first major surface; a neutral density filter disposed on the second major surface of the transparent substrate; and an ink layer disposed on the neutral density filter, wherein the ink layer comprises an ink having a reflection coefficient of less than 5%; and a display disposed on the second side of the deadfront, the display having an internal reflectance of less than 5%; wherein the ink layer defines a non-display region through which light from the display is not transmitted and absence of the ink layer defines a display region through which at light from the display is transmitted.
Aspect (35) pertains to the article of Aspect (34), wherein a contrast sensitivity between the non-display region and the display region is at least 15.
Aspect (36) pertains to the article of Aspect (34) or (35), wherein the neutral density filter transmits up to 80% of light in the visible spectrum.
Aspect (37) pertains to the article of any one of Aspects (34) through (36), wherein the neutral density filter transmits at least 60% of light in the visible spectrum.
Aspect (38) pertains to the article of any one of Aspects (34) through (37), wherein the neutral density filter comprises a film.
Aspect (39) pertains to the article of Aspect (38), wherein the film comprises one or more polyester layers and at least one layer comprising at least one of a dye, a pigment, a metallized layer, ceramic particles, carbon particles, or nanoparticles.
Aspect (40) pertains to the article of any one of Aspects (34) through (37), wherein the neutral density filter comprises an ink coating.
Aspect (41) pertains to the article of Aspect (40), wherein the ink coating is a CYMK neutral black.
Aspect (42) pertains to the article of Aspect (40) or (41), wherein the ink coating has an L* of from 50 to 90 according to the CIE L*a*b* color space.
Aspect (43) pertains to the article of any one of Aspects (34) through (42), wherein the display is at least one of a light emitting diode (LED) display, an organic LED (OLED) display, a liquid crystal display (LCD), or a plasma display.
Aspect (44) pertains to the article of any one of Aspects (34) through (43), further comprising a surface treatment disposed on the first major surface of the substrate.
Aspect (45) pertains to the article of Aspect (44), wherein the surface treatment is at least one of antiglare, etching, antireflection coating, or durable antireflection coating.
Aspect (46) pertains to the article of any one of Aspects (34) through (45), wherein the substrate is 1 mm or less in thickness.
Aspect (47) of this disclosure pertains to a vehicle, comprising: an interior surface; a display disposed on the interior surface, the display having an internal reflectance of less than 5%; a deadfront having a first side and a second side, the second side being opposite the first side and disposed on the display, the deadfront comprising: a substrate having a first major surface and a second major surface, the first surface corresponding to the first side of the deadfront and the second major surface being opposite the first major surface; a neutral density filter disposed on the second major surface of the transparent substrate; and an ink layer disposed on the neutral density filter, wherein the ink layer comprises an ink having a reflection coefficient of less than 5%; and wherein the ink layer defines a non-display region through which light from the display is not transmitted and absence of the ink layer defines a display region through which at light from the display is transmitted.
Aspect (48) pertains to the vehicle of Aspect (47), wherein a contrast sensitivity between the non-display region and the display region is at least 15.
Aspect (49) pertains to the vehicle of Aspect (47) or (48), wherein the neutral density filter transmits up to 80% of light in the visible spectrum.
Aspect (50) pertains to the vehicle of any one of Aspects (47) through (49), wherein the neutral density filter transmits at least 60% of light in the visible spectrum.
Aspect (51) pertains to the vehicle of any one of Aspects (47) through (50), wherein the neutral density filter comprises a film.
Aspect (52) pertains to the vehicle of Aspect (51), wherein the film comprises one or more polyester layers and at least one layer comprising at least one of a dye, a pigment, a metallized layer, ceramic particles, carbon particles, or nanoparticles.
Aspect (53) pertains to the vehicle of any one of Aspects (47) through (49), wherein the neutral density filter comprises an ink coating.
Aspect (54) pertains to the vehicle of Aspect (53), wherein the ink coating is a CYMK neutral black.
Aspect (55) pertains to the vehicle of Aspect (53) or (54), wherein the ink coating has an L* of from 50 to 90 according to the CIE L*a*b* color space.
Aspect (56) pertains to the vehicle of any one of Aspects (47) through (55), wherein the display is at least one of a light emitting diode (LED) display, an organic LED (OLED) display, a liquid crystal display (LCD), or a plasma display.
Aspect (57) pertains to the vehicle of any one of Aspects (47) through (56), further comprising a surface treatment disposed on the first major surface of the substrate.
Aspect (58) pertains to the vehicle of Aspect (57), wherein the surface treatment is at least one of anti-glare coating, an anti-glare surface, an antireflection coating, an antireflection surface, an easy-to-clean coating or an ink decoration.
Aspect (59) pertains to the vehicle of any one of Aspects (47) through (58), wherein the substrate is 1 mm or less in thickness.
Aspect (60) pertains to the vehicle of any one of Aspects (47) through (59), wherein the interior surface comprises any one of a dashboard, a seat back, an arm rest, a pillar, door panel, floor board, headrest, steering wheel, or a visor.
Unless otherwise expressly stated, it is in no way intended that any method set forth herein be construed as requiring that its steps be performed in a specific order. Accordingly, where a method claim does not actually recite an order to be followed by its steps or it is not otherwise specifically stated in the claims or descriptions that the steps are to be limited to a specific order, it is in no way intended that any particular order be inferred. In addition, as used herein, the article “a” is intended to include one or more than one component or element, and is not intended to be construed as meaning only one.
It will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit or scope of the disclosed embodiments. Since modifications, combinations, sub-combinations and variations of the disclosed embodiments incorporating the spirit and substance of the embodiments may occur to persons skilled in the art, the disclosed embodiments should be construed to include everything within the scope of the appended claims and their equivalents.
This application is a national stage application under 35 U.S.C. § 371 of International Application No. PCT/US2019/040485, filed on Jul. 3, 2019, which claims the benefit of priority under 35 U.S.C. § 119 of U.S. Provisional Application Ser. No. 62/696,967 filed on Jul. 12, 2018 the content of which is relied upon and incorporated herein by reference in its entirety.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US2019/040485 | 7/3/2019 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2020/014064 | 1/16/2020 | WO | A |
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