Patent Application
20240145645
The present disclosure relates to the field of display technologies, and in particular to an encapsulating structure, a display substrate and a manufacturing method therefor, and a display apparatus.
Similar to organic light-emitting diodes (OLEDs), miniature light-emitting diodes (including Mini LEDs and Micro LEDs) are self-luminous diodes, and have a series of advantages of high brightness, ultra-low delay, and large viewing angle, etc. Since the miniature light-emitting diodes are based on metal semiconductors with a more stable property and lower resistance to achieve light emission, compared with organic light-emitting diodes based on organics to achieve light emission, the miniature light-emitting diodes have advantages of lower power consumption, better resistance to high and low temperatures, and longer service life, etc.
The miniature light-emitting diodes are used as a backlight source, which can achieve a more precise dynamic backlight effect, solve the glare phenomenon between bright and dark regions of the screen caused by the traditional dynamic backlight and optimize the visual experience while effectively improving the screen brightness and contrast. In addition, the miniature light-emitting diodes are used as a display panel, which have the advantages of self-illumination, fast response, low power consumption, high contrast, long life, and high color saturation, etc., and will become the next generation of display after the liquid crystal display and organic light-emitting display.
Embodiments of the present disclosure provide an encapsulating structure, a display substrate and a manufacturing method therefor, and a display apparatus, which are used to solve the problem of the process edges without overflowing glue and the pressure resistance performance are not compatible in encapsulating structures in the prior art.
Therefore, embodiments of the present disclosure provide an encapsulating structure for encapsulating components, including:
Optionally, in the above encapsulating structure provided by the embodiments of the present disclosure, the first encapsulating layer includes at least two encapsulating sub-layers stacked in a direction away from the components; in the direction away from the components, an encapsulating sub-layer closest to the components includes an ingredient with variable viscosity.
Optionally, in the above encapsulating structure provided by the embodiments of the present disclosure, in the direction away from the components, the encapsulating sub-layer closest to the components further includes a first transparent colloid, and the ingredient with variable viscosity includes an adhesive.
Optionally, in the above encapsulating structure provided by the embodiments of the present disclosure, a mass ratio of the adhesive to the first transparent colloid is greater than or equal to 1:2 and less than or equal to 2:1.
Optionally, in the above encapsulating structure provided by the embodiments of the present disclosure, in the direction away from the components, the encapsulating sub-layer closest to the components further includes a first transparent colloid, and the ingredient with variable viscosity includes expansion particles.
Optionally, in the above encapsulating structure provided by the embodiments of the present disclosure, a mass fraction of the expansion particles in the first transparent colloid is greater than or equal to 0.5% and less than or equal to 3%.
In another aspect, embodiments of the present disclosure provide a display substrate, including:
Optionally, in the above display substrate provided by the embodiments of the present disclosure, a hardness of the second encapsulating layer is greater than a hardness of the first encapsulating layer.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the first encapsulating layer includes a first encapsulating sub-layer and a second encapsulating sub-layer stacked.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, at least one of the first encapsulating sub-layer, the second encapsulating sub-layer and the second encapsulating layer includes diffusion particles and/or carbon black particles.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the second encapsulating sub-layer is located at a side of the components away from the first encapsulating sub-layer, and the first encapsulating sub-layer includes the diffusion particles.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the second encapsulating sub-layer includes the carbon black particles.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, at least part of the first encapsulating sub-layer and the second encapsulating sub-layer protrudes toward a direction away from light-emitting devices, and an orthographic projection of the protrusions on the base substrate overlaps with an orthographic projection of the light-emitting devices on the base substrate.
Optionally, in the above display substrate provided by embodiments of the present disclosure, the protrusions include first protrusions located at the first encapsulating sub-layer; and the orthographic projection of the light-emitting devices on the base substrate is located within an orthographic projection of the first protrusions on the base substrate.
Optionally, in the above display substrate provided by embodiments of the present disclosure, the protrusions include first protrusions located at the first encapsulating sub-layer, and the first protrusions surround surfaces, perpendicular to the base substrate, of the light-emitting devices, respectively.
Optionally, in the above display substrate provided by embodiments of the present disclosure, a portion of the first encapsulating sub-layer located between first protrusions adjacent to each other is substantially parallel to the base substrate.
Optionally, in the above display substrate provided by embodiments of the present disclosure, the protrusions include second protrusions located at the second encapsulating sub-layer; and
Optionally, in the above display substrate provided by embodiments of the present disclosure, a portion of the second encapsulating sub-layer located between second protrusions adjacent to each other is substantially parallel to the base substrate.
Optionally, in the above display substrate provided by embodiments of the present disclosure, the first encapsulating sub-layer includes a first transparent colloid, the second encapsulating sub-layer includes a second transparent colloid, and the second encapsulating layer includes a third transparent colloid; and
Optionally, in the above display substrate provided by embodiments of the present disclosure, the first encapsulating sub-layer includes a first transparent colloid, the second encapsulating sub-layer includes a second transparent colloid, and the second encapsulating layer includes a third transparent colloid; and
Optionally, in the above display substrate provided by the embodiments of the present disclosure, a color of the first encapsulating sub-layer is black, and a color of the second encapsulating sub-layer is different from the color of the first encapsulating sub-layer.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, a color of the second encapsulating layer is different from the color of the first encapsulating sub-layer.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, in a direction in which the light-emitting devices are away from the base substrate, a sum of a thickness of the first encapsulating sub-layer, a thickness of the second encapsulating sub-layer, and a thicknesses of the second encapsulating layer is greater than a height of the light-emitting devices.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, an orthographic projection of at least one of the first encapsulating sub-layer, the second encapsulating sub-layer, and the second encapsulating layer in any direction covers an orthographic projection of the light-emitting devices.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, in a direction in which light-emitting diodes are away from the base substrate, the first encapsulating sub-layer, the second encapsulating sub-layer and the second encapsulating layer are sequentially stacked;
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the first encapsulating sub-layer is located between every two adjacent light-emitting devices; or, an orthographic projection of the first encapsulating sub-layer on the base substrate completely covers the orthographic projection of the light-emitting devices on the base substrate and the orthographic projection of the gap between every two adjacent light-emitting devices on the base substrate; and an orthographic projection of the first encapsulating sub-layer on the plane perpendicular to the surface of the base substrate facing the light-emitting devices completely covers the orthographic projection of the light-emitting devices on the plane perpendicular to the surface of the base substrate facing the light-emitting devices.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, in the direction in which the light-emitting devices are away from the base substrate, the second encapsulating sub-layer, the first encapsulating sub-layer and the second encapsulating layer are sequentially stacked;
Optionally, in the above display substrate provided by the embodiments of the present disclosure, a surface of the second encapsulating sub-layer away from the base substrate is substantially parallel to the base substrate.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, a surface of the second encapsulating sub-layer away from the base substrate at the gap between every two adjacent light-emitting devices is substantially parallel to the base substrate, and protrudes, at a region where the light-emitting devices are located, toward the direction in which the light-emitting devices are away from the base substrate.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, a refractive index of the first transparent colloid, a refractive index of the second transparent colloid and a refractive index of the third transparent colloid sequentially increase, or sequentially decrease, or are alternatively set.
Optionally, in the above display substrate provided by embodiments of the present disclosure, a maximum refractive index among the refractive index of the first transparent colloid, the refractive index of the second transparent colloid and the refractive index of the third transparent colloid is greater than or equal to 1.6, and a minimum refractive index among the refractive index of the first transparent colloid, the refractive index of the second transparent colloid and the refractive index of the third transparent colloid is approximately 1.41.
Optionally, the above display substrate provided by the embodiments of the present disclosure further includes: a transparent substrate layer located at a side of a stacked layer including the first transparent colloid, the second transparent colloid and the third transparent colloid away from the base substrate; and
Optionally, the above display substrate provided by the embodiments of the present disclosure further includes at least one auxiliary function layer located at a side of the transparent substrate layer away from the base substrate;
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the at least one auxiliary function layer further includes: a hardened layer and an anti-fingerprint layer stacked, and the hardened layer is located between the transparent substrate layer and the anti-fingerprint layer.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the anti-fingerprint layer and/or the hardened layer include atomized particles.
Optionally, in the above display substrate provided by embodiments of the present disclosure, at least one of the second transparent colloid and the third transparent colloid is dispersed with diffusion particles.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the second transparent colloid is dispersed with diffusion particles.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, a particle size of the diffusion particles is in a micron-scale, and a mass fraction of the diffusion particles in the second transparent colloid is in a range of 10%45%.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, a particle size of the diffusion particles is in a nano-scale, and a mass fraction of the diffusion particles in the second transparent colloid is in a range of 1.5%-3.5%.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the diffusion particles are transparent particles or white particles.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, a material of the transparent particles includes silicon dioxide or polymethyl methacrylate, and a material of the white particles includes titanium dioxide.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the first encapsulating sub-layer is black, the second encapsulating sub-layer is white, and the second encapsulating layer is transparent.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the first encapsulating sub-layer includes carbon black particles dispersed in the first transparent colloid.
Optionally, in the above display substrate provided by the embodiments of the present disclosure, the components are light-emitting devices.
In another aspect, embodiments of the present disclosure provide a manufacturing method for the above display substrate, including:
In another aspect, embodiments of the present disclosure provide a display apparatus, including the above display substrate provided by the embodiments of the present disclosure.
In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. It should be noted that the size and shape of each figure in the drawings do not reflect the true scale, but are only intended to illustrate the present disclosure. And the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout.
Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those having ordinary skill in the art to which the present disclosure belongs. “First”, “second” and similar words used in the present disclosure and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. “Comprising” or “containing” and similar words mean that the elements or items appearing before the words include the elements or items listed after the words and their equivalents, without excluding other elements or items. “Inner”, “outer”, “upper”, “lower” and so on are only used to indicate the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
Existing methods for encapsulating miniature light-emitting diodes include three schemes, i.e., molding, pressing a hard film and laminating a soft film, but these three schemes all have their limitations on the process. Among them, in the molding encapsulating process, the glue needs to be coated on the miniature light-emitting diode substrate, and the fluidity of the glue is good, so it will generate glue-overflow process edges. In the scheme of pressing the hard film, the hard film is a double-layer structure including a black hard film and a transparent hard film. Usually, the black hard film is heat-treated to become a molten state and then pressed on the miniature light-emitting diode substrate. Due to the black hard film of the molten state has a certain degree of fluidity, so it will generate glue-overflow process edges. In the scheme of laminating the soft film, the soft film includes multiple layers of soft plastic, which can be directly laminated on the miniature light-emitting diode substrate. Because the soft plastic has low fluidity, no glue-overflow process edges will be generated, but the pressure resistance performance of the soft film is poor.
In order to solve the above-mentioned problems existing in related art, embodiments of the present disclosure provide an encapsulating structure for encapsulating components E, as shown in
In the above-mentioned encapsulating structure provided by the embodiments of the present disclosure, the first encapsulating layer 101 is used to directly cover the components E, which will not generate glue-overflow process edges. In addition, the hardness of the second encapsulating layer 102 is adjustable, so that the pressure resistance performance of the encapsulating structure can be ensured to be better by increasing the hardness of the second encapsulating layer 102.
In some embodiments, in the above-mentioned encapsulating structure provided by the embodiments of the present disclosure, as shown in
The encapsulating sub-layer (e.g., the first encapsulating sub-layer 101a) closest to the components E directly covers the components E. In the case that the viscosity of the encapsulating sub-layer is adjustable, once the encapsulation is found to be poor, the entire encapsulating structure may be easily peeled off by reducing the viscosity of the encapsulating sub-layer without damaging the components E, thereby realizing the reworking for the components E and improving the product yield.
In some embodiments, in the above-mentioned encapsulating structure provided by the embodiments of the present disclosure, in the direction Y away from the components E, the encapsulating sub-layer (e.g., the first encapsulating sub-layer 101a) closest to the components E may further include a first transparent colloid, the above-mentioned ingredient with variable viscosity may include an adhesive. Optionally, the viscosity of the adhesive may be related to the temperature or other factors. In some embodiments, as shown in
In some embodiments, in the above encapsulating structure provided by the embodiments of the present disclosure, a mass ratio of the adhesive to the first transparent colloid may be greater than or equal to 1:2 and less than or equal to 2:1, e.g., 1:1. Within this ratio range and under the normal use environment (e.g., a room temperature), the encapsulating sub-layer (e.g., the first encapsulating sub-layer 101a) including the adhesive and the first transparent colloid can have good viscosity to ensure the lamination effect. Moreover, when heated to a certain temperature (e.g., 80° C. to 90° C.), the viscosity of the encapsulating sub-layer (e.g., the first encapsulating sub-layer 101a) including the adhesive and the first transparent colloid can be greatly reduced, so that it can be easily peeled off from the components E without glue residue and components E falling off when the encapsulating sub-layer needs to be peeled off.
In some embodiments, in the above encapsulating structure provided by the embodiments of the present disclosure, as shown in
In some embodiments, in the above-mentioned encapsulating structure provided by the embodiments of the present disclosure, a mass fraction of the expansion particles in the first transparent colloid may be greater than or equal to 0.5% and less than or equal to 3%, e.g., 1.5%. Within this ratio range and under the normal use environment (e.g., the room temperature), the encapsulating sub-layer (e.g., the first encapsulating sub-layer 101a) including the expansion particles and the first transparent colloid can have good viscosity to ensure the lamination effect. The volume of the expansion particles can be increased by heating, so that the encapsulating structure can be peeled off from the components E without glue residue and components E falling off.
Based on the same inventive concept, an embodiment of the present disclosure provides a display substrate, including the above encapsulating structure provided by the embodiments of the present disclosure. Since the problem-solving principle about the display substrate is similar to that of the above-mentioned encapsulating structure, the implementation of the display substrate can refer to the embodiments of the above-mentioned encapsulating structure, which will not be repeated herein.
Specifically, the display substrate provided by the embodiments of the present disclosure, as shown in
The thickness h1 of the first encapsulating layer 101 that is soft is greater than or equal to the height h2 of the components E, so that the components E can be completely wrapped by the first encapsulating layer 101, thereby avoiding the damage to the components E by the second encapsulating layer 102 with higher hardness.
In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, as shown in
It should be noted that, in the present disclosure, “the first encapsulating layer covers the components” may mean that the first encapsulating layer is in direct contact with each side surface of the components, or the first encapsulating layer is in direct contact with each side surface and the top surface of the components.
In some embodiments, in the above display substrate provided by the embodiments of the present disclosure, as shown in
In some embodiments, the particle size of the diffusion particles may be in the micron-scale or nano-scale. Considering that the diffusion particles can affect the light transmittance to a certain extent while diffusing the light, the concentration of the diffusion particles needs to be set reasonably. Optionally, on the basis of taking into account both the light mixing and transmittance, a mass fraction (i.e., concentration) of the micron-scale diffusion particles in the first transparent colloid can be set to be in a range of 10%-15%. The nano-scale diffusion particles have a greater impact on the transmittance, therefore, a mass fraction of nano-scale diffusion particles in the first transparent colloid can be smaller than the mass fraction of micron-scale diffusion particles in the first transparent colloid. For example, the mass fraction of the nano-scale diffusion particles in the first transparent colloid is set to be in a range of 1.5%-3.5%.
In some embodiments, the diffusion particles can be transparent particles or white particles. It should be understood that, when the diffusion particles are the transparent particles, the first encapsulating sub-layer 101a with the diffusion particles is colorless and transparent, and when the diffusion particles are the white particles, the first encapsulating sub-layer 101a with the diffusion particles is white. The first encapsulating sub-layer 101a in a transparent or white state can have better transmittance, which is beneficial to improve light efficiency.
In some embodiments, the material of the transparent particles may include silicon dioxide (SiO2) or polymethyl methacrylate (PMMA), and the material of the white particles may include titanium dioxide (TiO2). Certainly, in the specific implementation, the materials of the transparent particles and the white particles may also be other materials known to those skilled in the art, and are not specifically limited herein.
In some embodiments, in the above display substrate provided by the embodiments of the present disclosure, as shown in
Considering that when the light-emitting devices 104 are in a light-emitting state, the carbon black particles can absorb the light emitted by the light-emitting devices 104 to a certain extent, resulting in a slight loss of brightness in the white state. Therefore, in order to take into account the brightness of the black state and the light-emitting efficiency, in the present disclosure, the mass percentage (also referred to as concentration) of the carbon black particles doped in the second transparent colloid can be in a range of 2% to 4%, preferably 3%.
In some embodiments, the first encapsulating sub-layer 101a appears white because it is doped with the diffusion particles (such as white particles). The second encapsulating sub-layer 101b appears black because it is doped with the carbon black particles. The second encapsulating layer 102 appears transparent because it is not doped with the diffusion particles and carbon black particles.
In some embodiments, the light-emitting devices 104 may be miniature light-emitting diodes, e.g., Mini LEDs or Micro LEDs. Since a size of Mini LED is in a range of 100 μm to 200 μm, and a size of Micro LED is below 100 resolutions of Mini LED and Micro LED products can be higher, and display screens of the Mini LED and Micro LED products are more delicate. In addition, a major advantage of Mini LEDs and Micro LEDs is that they can be spliced, that is, multiple small-sized products can be spliced together to realize large-sized products.
In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, as shown in
In some embodiments, as shown in
In some embodiments, as shown in
It should be noted that in the present disclosure, the thickness h1 of the first encapsulating layer 101 refers to a thickness before lamination, which may be equivalent to a thickness of the first encapsulating layer 101 with better flatness at the gap between the light-emitting devices 104 after lamination, and is not a thickness of the first encapsulating layer 101 that is lifted up at the position of the light-emitting device 104.
In some embodiments, in the above display substrate provided by the embodiments of the present disclosure, the first encapsulating sub-layer 101a includes a first transparent colloid, the second encapsulating sub-layer 101b includes a second transparent colloid, and the second encapsulating layer 102 includes a third transparent colloid. A refractive index of the first transparent colloid, a refractive index of the second transparent colloid and a refractive index of the third transparent colloid can be substantially equal, or exactly equal, i.e., the difference between refractive indices which is zero. There may also be an error caused by the measurement or process, e.g., the difference between refractive indices is less than 0.1. The first transparent colloid, the second transparent colloid, and the third transparent colloid with the same refractive index are used, which avoids the requirement to adjust different colloid parameters when making different encapsulating layers, and saves costs.
In some embodiments, in the above display substrate provided by the embodiments of the present disclosure, the refractive index of the second transparent colloid may be different from the refractive index of the first transparent colloid, and the refractive index of the second transparent colloid is different from the refractive index of the third transparent colloid. That is, the refractive indices of two layers of transparent colloids which are adjacent to each other are different. Multiple layers of transparent colloids with different refractive indices can make the light emitted by the light-emitting devices 104 be refracted at an interface between the two adjacent layers of transparent colloids, which changes a propagation direction of the light, so that the refracted light is relatively divergent to achieve the effect of light mixing, reduce the chromatic aberration at the large viewing angle, and greatly improve the picture quality.
In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, in the case that the refractive index of the first transparent colloid contained in the first encapsulating sub-layer 101a is different from the refractive index of the second transparent colloid contained in the second encapsulating sub-layer 101b, a color of the first encapsulating sub-layer 101a may be black, and a color of the second encapsulating sub-layer 101b may be different from the color of the first encapsulating sub-layer 101a. By arranging the first encapsulating sub-layer 101a and the second encapsulating sub-layer 101b with different refractive indices on the light-emitting side of the plurality of light-emitting devices 104, the light emitted by the light-emitting devices 104 can be refracted at an interface between the first encapsulating sub-layer 101a and the second encapsulating sub-layer 101b, which changes the propagation direction of the emitted light, so that the refracted light is relatively divergent to achieve the effect of light mixing, reduce the chromatic aberration at the large viewing angle, and thus effectively solving the problem of the color shift at the large viewing angle and greatly improving the picture quality. At the same time, the black first encapsulating sub-layer 101a can effectively absorb ambient light and reduce the brightness of the black state. Since part of the light emitted by the light-emitting devices 104 can be absorbed by black to a certain extent, in the disclosure, by arranging the second encapsulating sub-layer 101b with the color different from the black, it can be ensured that the second encapsulating sub-layer 101b cooperating with the first encapsulating sub-layer 101a improves the color shift while reducing the absorption for the light emitted by the light-emitting devices 104 as much as possible and effectively improving the light-emitting efficiency, so as to improve the display brightness. Combining the above two factors the contrast and appearance quality of the product can be significantly improved.
In some embodiments, the black first encapsulating sub-layer 101a can be obtained by doping the melanin, e.g., carbon black particles, etc., in the first transparent colloid. Optionally, in order to take into account both the brightness of the black state and the light-emitting efficiency, the mass percentage (also referred to as concentration) of the carbon black particles doped in the first transparent colloid in the present disclosure can be in the range of 2% to 4%, preferably 3%.
In some embodiments, in the above display substrate provided by the embodiments of the present disclosure, the refractive index of the third transparent colloid contained in the second encapsulating layer 102, the refractive index of the first transparent colloid contained in the first encapsulating sub-layer 101a, and the refractive index of the second transparent colloid contained in the second encapsulating sub-layer 101b are different, and the color of the second encapsulating layer 102 is different from the color of the first encapsulating sub-layer 101a. The arrangement of the first encapsulating sub-layer 101a, the second encapsulating sub-layer 101b, and the second encapsulating layer 102 can make the light emitted by the light-emitting devices 104 be refracted at the interface between any two adjacent encapsulating layers, which further changes the propagation direction of the emitted light, so that the divergence of the refracted light is greater and a better effect of light mixing is achieved, and thus effectively solving the problem of the color shift at the large viewing angle and greatly improving the picture quality.
It should be noted that, in the disclosure, the problem of improving the color shift is illustrated by only taking the first encapsulating sub-layer 101a, the second encapsulating sub-layer 101b, and the second encapsulating layer 102 which are arranged as three light dimming layers as an example. Certainly, in the specific implementation, more light dimming layers can be provided to improve the color shift, as long as the refractive indices of the transparent colloids contained in two adjacent light dimming layers are different. Moreover, in the specific implementation, the respective light dimming layers can be fabricated in respective stages above the light-emitting devices 104; or the light dimming layers can also be fabricated as a stacked composite film layer, and then the composite film layer can be directly laminated with a side of the base substrate with the light-emitting devices 104.
In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, as shown in
In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, as shown in
It should be noted that the thickness of the encapsulating layer and the thickness of the encapsulating sub-layer in the present disclosure both refer to a coating thickness. Due to the existence of the light-emitting devices 104, the thickness of the encapsulating layer or the encapsulating sub-layer in the region where the light-emitting devices 104 are located, and the thickness of the encapsulating layer or the encapsulating sub-layer at the gap(s) between the light-emitting devices 104 may be different, and the thickness uniformity in the region where the light-emitting devices 104 located are poor. Therefore, the above coating thickness may be substantially equal to the thickness of the encapsulating layer or the encapsulating sub-layer at the gap(s) between the light-emitting devices 104 in an actual product.
Optionally, the height h2 of the light-emitting device(s) 104 is about 85 μm, the sum of the thickness h3 of the first encapsulating sub-layer 101a, the thickness h4 of the second encapsulating sub-layer 101b, and the thickness h5 of the second encapsulating layer 102 (i.e., h3+h4+h5) may be at least 50 μm-100 μm larger than the height h2 of the light-emitting device(s) 104. In some embodiments, the thickness h3 of the first encapsulating sub-layer 101a may be in the range of 25 μm to 50 μm, so that, the first encapsulating sub-layer 101a can be used to effectively improve the contrast while maintaining a high transmittance of the first encapsulating sub-layer 101a. The thickness h4 of the second encapsulating sub-layer 101b and the thickness h5 of the second encapsulating layer 102 can be 50 μm to 100 μm, so that the film layer yield of the second encapsulating sub-layer 101b and the second encapsulating layer 102 made through the coating process is relatively high. Certainly, in the specific implementation, the values of h3, h4, and h5 may be adjusted appropriately according to actual conditions, which will not be limited herein.
In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, in order to improve the color shift and effectively encapsulating the light-emitting devices 104, as shown in
Exemplarily, as shown in
As shown in
As shown in
It can be known from the above that, in the above display substrate provided by the embodiments of the present disclosure, the second encapsulating sub-layer 101b can directly or indirectly wrap each light-emitting device 104. Therefore, when the upper surface of the second encapsulating sub-layer 101b is far from the top of the light-emitting devices 104, as shown in
In addition, it can be seen from
In some embodiments, in the above display substrate provided by the embodiments of the present disclosure, the refractive index of the first transparent colloid, the refractive index of the second transparent colloid, and the refractive index of the third transparent colloid can sequentially increase, or sequentially decrease, or be alternatively set. Exemplarily, when the refractive index of the first transparent colloid, the refractive index of the second transparent colloid and the refractive index of the third transparent colloid are sequentially increase (i.e., from low to high), the refractive index of the first transparent colloid can be 1.41, the refractive index of the second transparent colloid can be 1.54, and the refractive index of the third transparent colloid can be 1.6. When the refractive index of the first transparent colloid, the refractive index of the second transparent colloid and the refractive index of the third transparent colloid are sequentially decrease (i.e., from high to low), the refractive index of the first transparent colloid can be 1.6, the refractive index of the second transparent colloid can be 1.54, and the refractive index of the third transparent colloid can be 1.41. when the refractive index of the first transparent colloid, the refractive index of the second transparent colloid and the refractive index of the third transparent colloid are alternatively set (i.e. alternating between high and low), the refractive index of the second transparent colloid can be 1.41, the refractive index of the first transparent colloid and the refractive index of the third transparent colloid each can be 1.54; or, the refractive index of the second transparent colloid can be 1.54, and the refractive index of the first transparent colloid and the refractive index of the third transparent colloid each can be 1.41.
In some embodiments, the materials of the first transparent colloid, the second transparent colloid and the third transparent colloid may include but not limited to materials with good transparency such as the silica gel, acrylic and epoxy resin, etc, and the refractive indices of the first transparent colloid, the second transparent colloid and the third transparent colloid may be the same or different by adjusting the ingredients of the silica gel, acrylic and epoxy resin, etc. Optionally, in order to improve light-emitting efficiency, the light transmittances of the first transparent colloid, the second transparent colloid and the third transparent colloid may be limited to be above 95%.
In some embodiments, the above-mentioned display substrate provided by the embodiments of the present disclosure, as shown in
In some embodiments, the material of the transparent substrate layer 105 can be polyethylene terephthalate (PET) or polycarbonate (PC). The refractive index of PET is 1.61, and the refractive index of PC is 1.51. Relevant data shows that in products with the transparent substrate layer 105 made of PET, the color shift at viewing angle is (H0.019, V0.034), and the brightness of the black state is 0.048 nit; and in products with the transparent substrate layer 105 made of PC, the color shift at viewing angle is (H0.019, V0.023), and the brightness of the black state is 0.044 nit. It can be seen that the products with the transparent substrate layer 105 made of PC has the better color shift at viewing angle and contrast than the products with the transparent substrate layer 105 made of PET.
In some embodiments, the above-mentioned display substrate provided by the embodiments of the present disclosure, as shown in
In some embodiments, as shown in
In some embodiments, in the above display substrate provided by the embodiments of the present disclosure, the hardened layer 106 and/or the anti-fingerprint layer 107 may include atomized particles. The atomized particles can make the anti-fingerprint layer 107 and the hardened layer 106 present a fog effect. In addition, it is worth noted that, in the case that the anti-fingerprint layer 107 and the hardened layer 106 are not doped with atomized particles, the anti-fingerprint layer 107 and the hardened layer 106 can exhibit a mirror effect. In some embodiments, the material of the atomized particles may be the silicon dioxide (SiO2) or polymethyl methacrylate (PMMA).
In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, as shown in
It can be seen from
It is worth noted that, as can be seen from
In some embodiments, in the above display substrate provided by the embodiments of the present disclosure, the particle size of the diffusion particles may be in a micron-scale or nano-scale. Considering that the diffusion particles can affect the light transmittance to a certain extent while diffusing the light, the concentration of the diffusion particles needs to be set reasonably. Optionally, on the basis of taking into account both the light mixing and transmittance, the mass fraction (i.e., concentration) of the micron-scale diffusion particles in the second transparent colloid can be set to be in a range of 10%-15%. The nano-scale diffusion particles have a greater impact on the transmittance, therefore, the mass fraction of nano-scale diffusion particles in the second transparent colloid can be smaller than the mass fraction of micron-scale diffusion particles in the second transparent colloid. For example, the mass fraction of the nano-scale diffusion particles in the second transparent colloid is set to be in a range of 1.5%-3.5%.
In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, the diffusion particles may be transparent particles or white particles. It should be understood that, when the diffusion particles are the transparent particles, the second encapsulating layer 101b is colorless and transparent; and when the diffusion particles are the white particles, the second encapsulating sub-layer 101b with the diffusion particles is white. The second encapsulating sub-layer 101b in a transparent or white state can have better transmittance, which is beneficial to improve the light efficiency.
In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, the material of the transparent particles may include atomized particles, e.g., the silicon dioxide (SiO2) or polymethyl methacrylate (PMMA), etc. The material of the white particles includes the titanium dioxide (TiO2). Certainly, in the specific implementation, the materials of the transparent particles and the white particles may also be other materials known to those skilled in the art, which are not specifically limited herein.
It should be noted that those of ordinary skill in the art should understand that the above-mentioned display substrate provided by the embodiments of the present disclosure has other essential components (e.g., a driving circuit), which will not be repeated herein and should not as a limitation of the disclosure.
Based on the same inventive concept, embodiments of the present disclosure also provide a manufacturing method for the above-mentioned display substrate. Since the problem-solving principle of the manufacturing method is similar to that of the above-mentioned display substrate, the implementation of the manufacturing method can refer to the above-mentioned embodiment of the display substrate, which will not be repeated herein.
Specifically, the manufacturing method for the above-mentioned display substrate provided by the embodiments of the present disclosure, as shown in
S1301, providing a base substrate.
S1302, forming a plurality of components on the base substrate.
S1303, laminating an encapsulating structure on the plurality of components; the encapsulating structure includes a first encapsulating layer and a second encapsulating layer stacked, the first encapsulating layer covers the plurality of components, and the second encapsulating layer is located at a side of the first encapsulating layer away from the plurality of components.
S1304, hardening (e.g., heating or light irradiating) the second encapsulating layer, so that the surface of the second encapsulating layer away from the first encapsulating layer is substantially parallel to the base substrate. Optionally, the hardness of the second encapsulating layer is greater than that of the first encapsulating layer.
It should be noted that, in the above manufacturing method provided by the embodiments of the present disclosure, the patterning process involved in forming each layer structure may not only include a part or all of processes of the deposition, photoresist coating, masking using a mask, exposure, development, etching, photoresist stripping, etc., but also include other processes, which are specific to the required pattern in the actual manufacture process and is not limited herein. For example, a post-baking process may also be included after the development and before the etching.
The deposition process can be the chemical vapor deposition, plasma enhanced chemical vapor deposition or physical vapor deposition, which is not limited herein. The mask used in the masking process can be a half tone mask, or single slit mask or gray tone mask, which is not limited herein. The etching can be the dry etching or wet etching, which is not limited herein.
Based on the same inventive concept, an embodiment of the present disclosure further provides a display apparatus, including the above-mentioned display substrate provided by the embodiments of the present disclosure. Since the problem-solving principle of the display apparatus is similar to the problem-solving principle of the above-mentioned display substrate, the implementation of the display apparatus can refer to the above-mentioned embodiment of the display substrate, which will not be repeated herein.
In some embodiments, the display apparatus can be any product or assembly unit with a display function, e.g., a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a smart watch, a fitness wristband, a personal digital assistant, etc. The display apparatus includes but not limited to elements, e.g., a radio frequency unit, a network module, an audio output & input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply, etc. In addition, those skilled in the art can understand that the above-mentioned structures do not constitute a limitation on the above-mentioned display apparatus provided by the embodiments of the present disclosure. In other words, the above-mentioned display apparatus provided by the embodiments of the present disclosure may include more or less than the above elements, or a combination of certain elements, or a different arrangement of elements.
Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and equivalent technologies thereof, the present disclosure also intends to include these modifications and variations.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202111254074.4 | Oct 2021 | CN | national |
The present disclosure claims the priority and is National Stage of International Application No. PCT/CN2022/121453, filed on Sep. 26, 2022, which claims priority to Chinese Patent Application No. 202111254074.4, filed to China National Intellectual Property Administration on Oct. 27, 2021 and entitled “ENCAPSULATING STRUCTURE, DISPLAY SUBSTRATE AND MANUFACTURING METHOD THEREFOR, AND DISPLAY APPARATUS”, the entire contents of which are incorporated herein by reference.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/121453 | 9/26/2022 | WO |
