This application claims priority of China Patent Application No. 202010064785.4, filed on Jan. 20, 2020, the entirety of which is incorporated by reference herein.
The present disclosure relates to a display device, and particularly it relates to a display device that may reduce the color difference between a display region and a non-display region when the display device is turned off.
In recent years, in response to continuous improvement in display devices and the quality of displayed images, consumers' requirements for the design texture of display devices have also continuously increased. Generally, a display device includes a display region for displaying images and a non-display region enclosed by the display area. When the display device is turned off, it is desirable that the color (for example, black) presented in the display region is consistent with the color (for example, black) of the non-display region, so that the display device has visual unity, thereby enhancing the texture or quality of the product. However, in conventional display devices, because the non-display region is limited by the materials used to fabricate it, it is difficult to match the color of the non-display region to the color of the display region while in a non-display state.
One embodiment of the present disclosure discloses a display device. The display device includes a display module, a peripheral member, and a cover glass. The peripheral member is disposed on the display module and partially overlaps the display module. The cover glass is disposed on the peripheral member. The peripheral member includes a color filter layer.
According to the display device of each of the above embodiments, the peripheral member surrounding the display module includes a color filter layer. By adjusting the aperture ratio of the pixels in the color filter layer and the area percentage of adjustment unit of each color, the color difference between the non-display region and the display region may be reduced when the display device is turned off.
A detailed description is given in the following embodiments with reference to the accompanying drawings.
The disclosure can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
The following description provides many different embodiments for implementing different features of the present disclosure. The elements and arrangements described in the following specific embodiments are only used to concisely express the disclosure, however, the disclosure is not limited thereto. For example, the description related to the structure where a first feature is on or above a second feature indicates that there is a direct contact between the first and second features or that another feature is placed between the first and second features such that the first feature does not directly contact with the second feature.
The words which are used to describe a spatial relationship, such as above or below, are only used to describe the relationship of one element or feature with respect to another element or feature in the drawings. In addition to the orientation described in the drawings, devices may be used or operate in different orientations. The shapes, sizes, and thicknesses shown in the drawings may not be drawn to scale or may be simplified for the purpose of clear description, and they are only provided for illustrative purposes.
Accordingly, the colors seen by the human eye must first be quantified. A color may be defined using the CIE 1976 (L*, a*, b*) color space. Each color of the CIE 1976 color space is determined by three coordinates, wherein L* represents the brightness of the color. L*=0 represents black, and L*=100 represents white. The hue represented by a* and b* is close to red when a* is a positive value, close to green when a* is a negative value, close to yellow when b* is a positive value, and close to blue when b* is a negative value. Assume that, when the display device 10 is turned off, a CIE 1976 color space coordinate of the display region 101 is represented by be R101(L1*, a1*, b1*), and a CIE 1976 color space coordinate of the non-display region 102 is represented by R102(L2*, a2*, b2*). Then, Equation 1, which is an equation that calculates the color difference value ΔE of the display region 101 and the non-display region 102. The smaller the color difference value ΔE is, the closer the colors of the display region 101 and the non-display area 102 are. When the color difference value ΔE is less than 3, the color difference between the display region 101 and the non-display region 102 cannot be recognized through the human eye.
ΔE=√{square root over ((L1*−L2*)2+(a1*−a2*)2+(b1*−b2*)2)} Equation 1
In the past, the color of the non-display region was adjusted by mixing a plurality of inks. However, because of the limitations of ink materials, the colors that can be adjusted are also limited, and it is not easy to match the specific color of the display region. Therefore, in the present disclosure, patterned color resists are disposed in the non-display region 102. By adjusting the aperture ratio of the color resists and the area percentage of each color resist, the adjustable range of the non-display region 102 can be greatly increased, thereby improving the visual unity of the display region 101 and the non-display region 102.
The display module 112 may, for example, includes light emitting diodes (LEDs), liquid crystals, quantum dots (QDs), fluorescence, phosphor, other suitable materials, or the combination of the above materials, but the present disclosure is not limited thereto. In some embodiments, the light emitting diodes may include, for example, organic light emitting diodes (OLEDs), submillimeter light emitting diodes (mini LEDs), micro light emitting diodes (micro LEDs), or quantum dot light emitting diodes (QLEDs, QDLEDs), but the present disclosure is not limited thereto. As shown in
The peripheral member 113 may include a color filter layer 1131 and a light shielding layer 1132. The color filter layer 1131 is disposed on the display module 112. The light shielding layer 1132 may be disposed between the color filter layer 1131 and the display module 112. When the display device 10 is turned on, the light-shielding layer 1132 may be used to reduce the incidence of external light or the transmission of the backlight which can affect the display quality of the display module 112 or the light-shielding layer 1132 may be used to shield a component of the display device, the component of the display device such as a printed circuit board (PCB) or a backlight source, but the present disclosure is not limited thereto. When the display device 10 is turned off, since the peripheral member 113 is not a self-luminous region, the presented color of the peripheral member 113 comes from the light that enters the human eye after the external light is reflected in the non-display region 102.
The color filter layer 1131 may include an adjustment unit 301, an adjustment unit 302, and an adjustment unit 303, but the present disclosure is not limited thereto. The color filter layer 1131 may further include an adjustment unit 310.
In some embodiments, the aforementioned adjustment units 310, 301, 302, and 303 may include color resists of different colors, and the color resist of each color has its own reflection spectrum.
Moreover, the aperture ratio is also set as a variable factor, the adjustable range of the color of the non-display region 102 will be wider, so that the color of the non-display region 102 is easily close to the color of the display region 101 in the non-display state In other words, the area percentage of each adjustment unit in the color filter layer 1131 can be adjusted so that the adjustment unit 301, the adjustment unit 302, and the adjustment unit 303 have different area percentages, thereby adjusting the color of the non-display region 102. Accordingly, the color difference ΔE between the peripheral member 113 and the display module 112 in the non-display state is less than 3, that is, the human eye cannot distinguish the color difference between the non-display region 102 and the display region 101 in the non-display state. In another embodiment of the present disclosure, for example, the area percentages of the four adjustment units 301, 302, 303, and 310 can be adjusted so that the four adjustment units 301, 302, 303, and 310 have different area percentages, thereby adjusting the color of the non-display region 102, but the disclosure is not limited thereto. In another embodiment of the present disclosure, for example, the four adjustment units 301, 302, 303, and 310 may have different shapes, such as rectangular or circular, etc., thereby adjusting the color of the non-display region, but the present disclosure is not limited thereto.
It should be noted that although the color filter layer 1131 is manufactured by using the same manufacturing method as color filters of the liquid crystal panel 1123, the color filter layer 1131 is arranged around the display module 112 but does not belong to the liquid crystal panel 1123. Therefore, the color filter layer 1131 is not manufactured at the same time as the color filters of the liquid crystal panel 1123. In addition, the color filter layer 1131 is used for adjustment of a specific color, for example, black, and, thus, the function of the color filter layer 1131 is different from the color-displaying function of the color filters in the liquid crystal panel 1123.
According to the above embodiments, the present disclosure disposes the peripheral member comprising the color filter layer in the non-display region of the display device and adjusts the aperture ratio of the color filter layer and the area percentage of each color filter unit. Thus, when the display device is turned off, the color difference between the non-display region in the peripheral member and the display region outside the peripheral member is reduced.
In another embodiment of the present disclosure, for example, the four adjustment units 301′, 302′, 303′, and 304′ may have different shapes, thereby adjusting the color of the non-display region 102, but the present disclosure is not limited thereto.
According to
If the condition that the human eye cannot perceive pixels is met in any vi win distance within the range of 50˜80 cm, the lower limit of pixels per inch (PPI) must be 165.9 pixels per inch (PPI) corresponding to the viewing distance of 50 cm, which is the strictest and safest PPI value for the vie distances within the range 50˜80 cm. In this way, by designing the pixel pitch of the color filter layer in the non-display region of the display device to cause the PPI value to be above 103.7 pixels per inch and below 400 pixels per inch (for example, 110 pixels per inch, 120 pixels per inch, or 300 pixels per inch), the user's perception of the presence of pixel particles in the non-display region can be degraded.
It should be noted that the above-mentioned pixel-pitch setting is based on the example that the display device is a vehicle display device. The display device disclosed in the present disclosure is not limited to a vehicle display device. However, the display device disclosed in the present disclosure may be applied to other devices, such as electronic bulletin boards, televisions, and the like. When the display device disclosed in the present disclosure is applied to devices with a longer viewing distance, such as outdoor electronic signage or spliced displays, the lower limit of the value representing pixels per inch can be adjusted based on the viewing distances shown in
According to the above-mentioned embodiments, the present disclosure causes the color of the non-display region to be close to the color of the display region by disposing the color filter layer in the peripheral member in the non-display region of the display device. The present disclosure further sets the value representing pixels per inch of the adjustment unit of the color filter layer in the non-display region to prevent the user from perceiving the pixel particles.
Although this disclosure uses various embodiments above, they are only for reference rather than limiting the scope of this disclosure. Those skilled in the art may make few changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the above-mentioned embodiments are not used to limit the scope of the present disclosure, and the protection scope of the present disclosure should be defined by claims. The above-disclosed features can be combined, modified, replaced, or transferred with one or more disclosed embodiments in any suitable manner, and the present disclosure is not limited any specific embodiment.
Number | Date | Country | Kind |
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202010064785.4 | Jan 2020 | CN | national |