Display device
By setting a haze gradient area and microstructures on the cover of the display device, the problems of unclear display in dark environments and color difference, bright and dark bands and light leakage caused by the front light module are solved, thus improving the display effect.
Patent Information
- Application Number
- CN202411084164.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2026-02-10
AI Technical Summary
Reflective LCD displays are unclear and have poor contrast in dark environments, and the color difference, bright and dark bands, and light leakage caused by the front light module are difficult to solve effectively.
A haze gradient area and microstructures are set on the cover of the display device. The haze gradient area improves light leakage and bright-dark bands near the light source. Combined with the setting of the haze gradient area in places not near the light source and between two adjacent sides, the problem of uneven brightness at the angle caused by the light source is solved.
It effectively reduces light leakage, bright and dark bands and color difference in display devices, and improves display quality, especially the poor visual effect near the light source and at oblique angles.
Smart Images
Figure CN121500633A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of display devices, and relates to a reflective display device. Background Technology
[0002] Liquid crystal displays (LCDs) include transmissive and reflective types. Reflective displays do not require a backlight; they use the reflection of ambient light to provide illumination and generate images, thus reducing power consumption.
[0003] Reflective LCD monitors suffer from drawbacks such as poor visibility and contrast in low-light conditions. Therefore, some reflective monitors include a front light module, located on the light-emitting side of the monitor, to provide auxiliary light. The light-emitting elements of the front light module are typically located near the monitor's bezel. The light guide plate of the front light module receives light from the light-emitting elements from the side and converts it into a surface light source as auxiliary light. However, when the light-emitting elements are emitting light, the area near the elements is prone to technical problems such as color difference, bright and dark bands, and light leakage. Summary of the Invention
[0004] To address the aforementioned technical problems, the present invention provides a display device comprising: a display panel; a front light module disposed on the display panel, the front light module including a light guide plate and a first light source; and a cover plate disposed on the light guide plate, the cover plate having a visible area, the visible area having a first haze gradient area, wherein the first haze gradient area is located on a first side of the visible area, and the haze of the first haze gradient area changes along a first direction.
[0005] In one embodiment, the first haze gradient area and the first light source are located on the same side of the display device.
[0006] In one embodiment, the first direction is perpendicular to the first side.
[0007] In one embodiment, the haze in the first haze gradient region gradually changes from a first haze to a second haze along the first direction, wherein the first haze is greater than or less than the second haze.
[0008] In one embodiment, the first haze is greater than the second haze, and the haze in the first haze gradient zone further changes from the second haze to a third haze along the first direction, wherein the third haze is greater than the second haze.
[0009] In one embodiment, the first haze is less than the second haze, and the haze in the first haze gradient zone further changes from the second haze to a third haze along the first direction, wherein the third haze is less than the second haze.
[0010] In one embodiment, the ratio of the length of the first haze gradient region in the first direction to the length of the visible region in the first direction is less than or equal to 1 / 3.
[0011] In one embodiment, the visible area further includes a second haze gradient area located on a second side of the visible area, the second side being relative to the first side, and the haze of the second haze gradient area changing in the opposite direction to the first direction.
[0012] In one embodiment, the front light module includes a second light source, and the second haze gradient area is located on the same side of the display device as the second light source.
[0013] In one embodiment, the visible area further includes a third haze gradient area located on a third side of the visible area, the third side being adjacent to the first side, the haze of the third haze gradient area changing along a second direction, and the second direction not being parallel to the first direction.
[0014] In one embodiment, the visible area further has a fourth haze gradient area located on a fourth side of the visible area, the haze of the fourth haze gradient area changing along the second direction relative to the third side.
[0015] In one embodiment, the ratio of the length of the third haze gradient zone in the second direction to the length of the visible zone in the second direction is less than or equal to 1 / 3.
[0016] In one embodiment, the ratio of the length of the fourth haze gradient zone in the second direction to the length of the visible zone in the second direction is less than or equal to 1 / 3.
[0017] In one embodiment, the visible area further includes a slanted haze gradient area located between two adjacent sides of the visible area, and the extension direction of the slanted haze gradient area is located between the respective extension directions of the two adjacent sides.
[0018] In one embodiment, the cover plate includes a substrate and a film layer, the film layer being disposed on a surface of the substrate and located in the first haze gradient region, and the haze of the film layer changing along the first direction.
[0019] In one embodiment, the cover plate includes a substrate having a first surface and a second surface opposite to each other, at least one of the first surface and the second surface having a plurality of microstructures disposed in the first haze gradient region.
[0020] The beneficial effects of this invention are as follows: by providing a haze gradient zone on the side of the cover plate near the light source, light leakage in the visible area near the light source is improved. Furthermore, depending on the light leakage, brightness / darkness, and color difference, a haze gradient zone can also be provided on other sides of the cover plate not near the light source, or a haze gradient zone can be provided between two adjacent sides to improve the problem of uneven brightness at the angle caused by the light source. In addition, the combination of the haze gradient zone and the microstructure further minimizes the degree of light leakage. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of a display device according to a first embodiment of the present invention;
[0022] Figure 2 This is a partial cross-sectional schematic diagram of a display device according to a first embodiment of the present invention;
[0023] Figure 3 This is a schematic diagram of the front light module of a display device according to a first embodiment of the present invention;
[0024] Figure 4 This is a schematic diagram of the cover plate of a display device according to a first embodiment of the present invention;
[0025] Figure 5 This is a schematic diagram of the microstructure according to a first embodiment of the present invention;
[0026] Figures 6 to 11 A schematic diagram of a cover plate for a display device with various modifications according to a first embodiment of the present invention;
[0027] Figure 12 A display device for displaying a variation of a first embodiment of the present invention;
[0028] Figure 13 This is a schematic diagram of a display device according to a second embodiment of the present invention;
[0029] Figure 14 This is a schematic diagram of the front light module of a display device according to a second embodiment of the present invention;
[0030] Figure 15 This is a schematic diagram of the cover plate of a display device according to a second embodiment of the present invention;
[0031] Figure 16 A partial cross-sectional schematic diagram of a display device according to a second embodiment of the present invention; and
[0032] Figures 17 to 19 This is a schematic diagram of a cover plate for a display device with various modifications according to a second embodiment of the present invention. Detailed Implementation
[0033] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.
[0034] Figure 1 This is a schematic diagram of a display device according to a first embodiment of the present invention. Figure 2 This is a partial cross-sectional schematic diagram of a display device according to a first embodiment of the present invention. Figure 3 This is a schematic diagram of the front light module of a display device according to a first embodiment of the present invention. Figure 4 This is a schematic diagram of the cover plate of a display device according to a first embodiment of the present invention. (Refer to...) Figures 1 to 4 In a first embodiment, the present invention provides a display device 100, which mainly includes a display panel 1, a front light module 2 and a cover plate 3.
[0035] In this embodiment, the display panel 1 may be, for example, a reflective display panel and has a display surface DS.
[0036] The front light module 2 is disposed on the display panel 1, specifically on the display surface DS of the display panel 1, to provide a front light source as an auxiliary light source. For example, in an embodiment where the display panel 1 is a reflective display panel, in cases of insufficient ambient light, the front light module 2 can be activated as an auxiliary light source, and the display panel 1 can reflect the light from the front light module to form a corresponding image. Specifically, the front light module 2 includes a light guide plate 21 and a first light source 22. Figure 1 As shown, the light guide plate 21 can be disposed on the light-emitting surface (i.e., display surface DS) of the display panel 1 by an optical adhesive layer 5, but is not limited thereto. The first light source 22 is disposed on one side of the light guide plate 21 (i.e., the first light source 22 is disposed on one light-incident surface LS of the light guide plate 21) to provide incident light to the light-incident surface LS on the side of the light guide plate 21. After the incident light enters the light guide plate 21, it is converted into a surface light source by the optical structure MS (e.g., dot matrix) of the light guide plate 21 to provide an auxiliary light source for the display panel 1. Figure 3 As shown, the first light source 22 includes at least one light-emitting element 22a. Figure 3Taking the first light source 22 as an example, which includes multiple light-emitting elements 22a, such as light-emitting diodes (LEDs). Optionally, the first light source 22 may be a light strip or a light panel. The first light source 22 also includes a substrate 22b (e.g., a circuit board), and the light-emitting elements 22a are disposed on the substrate 22b.
[0037] like Figure 1 , Figure 2 and Figure 4 As shown, the cover plate 3 includes a substrate 31 and has a visible area A and a frame area N. The frame area N is located around the periphery of the cover plate 3 and surrounds the visible area A. The cover plate 3 is disposed on the light guide plate 21. Specifically, the cover plate 3 can be disposed on the light guide plate 21 by an adhesive material 4, for example... Figure 1 , Figure 2 In this context, the adhesive material 4 is a frame adhesive disposed on the edge of the cover plate 3 (i.e., the adhesive material 4 overlaps the frame area N of the cover plate 3 in the third direction D3); or as... Figure 12 As shown, Figure 12 This is a schematic diagram of a modified display device according to a first embodiment of the present invention. The adhesive material 4' can be an optical adhesive material disposed between the cover plate 3 and the light guide plate 21. It can be a single layer or multiple layers of adhesive material, and the adhesive material 4' also overlaps the visible area A of the cover plate 3 in a third direction D3. Figure 4 As shown, in this embodiment, the visible area A has a first haze gradient area Z1, wherein the first haze gradient area Z1 is located on a first side S1 of the visible area A, and the haze of the first haze gradient area Z1 varies along a first direction D1. In this embodiment, the first direction D1 may be perpendicular to the extending direction of the first side S1.
[0038] In detail, in one embodiment of the present invention, the cover plate 3 may further include a film layer PL, the substrate 31 has a first surface 311 and a second surface 312, the first surface 311 and the second surface 312 are opposite to each other, and the film layer PL may be formed on one of the first surface 311 and the second surface 312. Figure 2 Taking the film layer PL formed on the first surface 311 as an example, and located in the first haze gradient region Z1, the haze of the film layer PL changes along the first direction D1, so that the haze of the first haze gradient region Z1 of the cover plate 3 changes along the first direction D1. Specifically, as Figure 2As shown, the first haze gradient region Z1 can be formed by inkjet printing an ink layer (i.e., film layer PL) with haze gradient on the first surface 311, wherein a higher inkjet density represents greater haze. Of course, the present invention is not limited thereto. The first haze gradient region Z1 can be formed in any way that can create a gradient haze; for example, it can also be formed by etching the substrate 31 to create a specific haze gradient structure in the first haze gradient region Z1. Furthermore, the haze in the haze gradient region can be stacked, and the number of layers and the number of gradient segments are not limited.
[0039] Figure 5 This is a schematic diagram of the microstructure of the substrate of the cover plate according to a first embodiment of the present invention. (Refer to...) Figure 5 To further improve light leakage, the substrate 31 may also have multiple microstructures. In this embodiment, the multiple microstructures are formed on the first surface 311 and the second surface 312 of the substrate 31, and may specifically be multiple trenches, but are not limited thereto. The multiple microstructures may be disposed in the first haze gradient region Z1. Selectively, the microstructures may be formed only on one of the first surface 311 and the second surface 312 of the substrate 31.
[0040] Since peripheral color difference, bright-dark bands, and light leakage of the front light module tend to occur near the edge of the light source, a first haze gradient area Z1 is provided on the first side S1 of the visible area A near the first light source 22 on the cover plate 3 to improve peripheral color difference, bright-dark bands, and light leakage on the light-incident side of the display device 100. Furthermore, depending on different needs and applications, such as the distribution of the intensity of color difference, bright-dark bands, and light leakage, the present invention provides various embodiments of the first haze gradient area (e.g., Figure 4 , Figure 6 , Figure 7 and Figure 8 ).like Figure 4As shown, the first direction D1 is perpendicular to the first side S1, and the first haze gradient area Z1 and the first light source 22 are located on the same side of the display device 100. The first haze gradient area Z1 is formed with a gradual haze within a predetermined distance from the edge of the visible area A (i.e., the first side S1) towards the center. In terms of range proportion, the ratio of the length L1 of the first haze gradient area Z1 in the first direction D1 (i.e., the predetermined distance) to the length L of the visible area A in the first direction D1 can be less than or equal to 1 / 3 to avoid the excessively large area of the first haze gradient area Z1 affecting the image quality of the display device 100, but is not limited thereto. For example, the length L1 can be less than or equal to 5 cm. In addition, the length L1 can also be greater than or equal to 1 cm to significantly reduce the color difference, bright and dark bands and light leakage of the display device 100 and improve the image quality of the display device 100, but is not limited thereto. Refer to Figure 4 In a first embodiment, the haze of the first haze gradient region Z1 gradually changes from a first haze to a second haze along the first direction D1 (i.e., from the first side S1 toward the center), wherein the first haze is greater than the second haze (i.e., the haze of the first haze gradient region Z1 gradually decreases from the first side S1 along the first direction D1). Of course, the present invention is not limited thereto. Figure 6 , Figure 7 and Figure 8 This is a schematic diagram of a cover plate for a display device with various modifications according to a first embodiment of the present invention. For example... Figure 6 As shown, in another embodiment, the haze of the first haze gradient region Z1 can gradually change from a first haze to a second haze along the first direction D1, and the first haze is less than the second haze (i.e., the haze of the first haze gradient region Z1 gradually increases from the first side S1 along the first direction D1). Figure 7 As shown, in another embodiment, the haze of the first haze gradient region Z1 can gradually change from a first haze to a second haze along the first direction D1, where the first haze is greater than the second haze. The haze of the first haze gradient region Z1 can also gradually change from the second haze to a third haze along the first direction D1, where the third haze is greater than the second haze (i.e., the haze of the first haze gradient region Z1 gradually decreases and then gradually increases from the first side S1 along the first direction D1). Figure 8As shown, in another embodiment, the haze of the first haze gradient region Z1 can gradually change from a first haze to a second haze along the first direction D1, where the first haze is less than the second haze. The haze of the first haze gradient region Z1 can also gradually change from the second haze to a third haze along the first direction D1, where the third haze is less than the second haze (i.e., the haze of the first haze gradient region Z1 gradually increases and then decreases from the haze of the first side S1 along the first direction D1).
[0041] Peripheral chromatic aberration, bright-dark bands, and light leakage in the front light module are not only prone to occur near the edges of the light source, but also, because the light from the light source is transmitted through the light guide plate, some light may leak out through the other edges of the light guide plate. Furthermore, this light may be reflected or diffused by other components of the display device, causing peripheral chromatic aberration, bright-dark bands, and light leakage to occur at the other edges of the front light module. Therefore, in some implementations, a haze gradient area can be provided on the other sides of the cover plate to further improve peripheral chromatic aberration, bright-dark bands, and light leakage in the display device. Various implementations of providing a haze gradient area on the other sides of the cover plate will be described below. Figure 9 This is a schematic diagram of a cover plate for a display device according to another variation of the first embodiment of the present invention. Figure 10 This is a schematic diagram of a cover plate for a display device according to another variation of the first embodiment of the present invention. (Refer to...) Figure 9 In another embodiment, the visible area A further includes a second haze gradient area Z2, located on a second side S2 of the visible area A, relative to the first side S1, and the haze of the second haze gradient area Z2 changes along the opposite direction of the first direction D1. In this embodiment, the opposite direction of the first direction D1 may be perpendicular to the extending direction of the second side S2. For example, the haze of the second haze gradient area Z2 may gradually change from a first haze to a second haze along a direction opposite to the first direction D1 (i.e., the opposite direction of the first direction D1), and the first haze is greater than or less than the second haze (i.e., the haze of the second haze gradient area Z2 gradually decreases or increases from the second side S2 along a direction opposite to the first direction D1). Or, similarly to the foregoing, the haze gradient of the second haze gradient area Z2 may be similar to... Figure 7 Implementation plan or Figure 8 The fog variation pattern of the implementation scheme (i.e., the fog of the second fog gradient zone Z2 gradually decreases and then increases or increases and then decreases from the second side S2 along a direction opposite to the first direction D1). The ratio of the length L2 of the second fog gradient zone Z2 in the first direction D1 to the length L of the visible area A in the first direction D1 is less than or equal to 1 / 3.
[0042] For example, refer to Figure 10 The embodiment shows an implementation where, in addition to the first side S1 and the second side S2, a haze gradient zone is also provided on a third side S3 and a fourth side S4 adjacent to the first side S1 and the second side S2. In this embodiment, the visible area A has a third haze gradient zone Z3, which is located on the third side S3 of the visible area A. The haze of the third haze gradient zone Z3 varies along a second direction D2, and the second direction D2 is not parallel to the first direction D1. In this embodiment, the second direction D2 may be perpendicular to the extension direction of the third side S3. Furthermore, in this embodiment, since the top view shape of the visible area A is rectangular, the second direction D2 is perpendicular to the first direction D1, but this is not a limitation. In other embodiments, the top view shape of the visible area may be non-rectangular, and the second direction D2 is neither parallel to nor perpendicular to the first direction D1. Optionally, the visible area A further includes a fourth haze gradient area Z4, located on the fourth side S4 of the visible area A (relative to the third side S3). The haze of the fourth haze gradient area Z4 varies along the opposite direction of the second direction D2. In this embodiment, the opposite direction of the second direction D2 may be perpendicular to the extension direction of the fourth side S4. The ratio of the length L3 of the third haze gradient area Z3 in the second direction D2 to the length W of the visible area A in the second direction D2 is less than or equal to 1 / 3, and the ratio of the length L4 of the fourth haze gradient area Z4 in the second direction D2 to the length W of the visible area A in the second direction D2 is less than or equal to 1 / 3. Similarly, the haze gradient of the third haze gradient area Z3 and the fourth haze gradient area Z4 may be as described above. Figure 4 as well as Figures 6 to 8 Any form of haze variation (i.e., the haze of the third haze gradient zone Z3 gradually decreases or increases from the third side S3 along the second direction D2, or decreases first and then increases, or increases first and then decreases, while the haze of the fourth haze gradient zone Z4 gradually decreases or increases from the fourth side S4 along the opposite direction of the second direction D2, or decreases first and then increases, or increases first and then decreases).
[0043] Furthermore, due to the influence of the position and light emission angle of the light source element of the front light module, the front light module may also produce a bright and dark spray area at an angle. Therefore, in some implementations, an oblique haze gradient area can be provided in the visible area of the cover plate to further improve the poor visual effect caused by the bright and dark spray area at an angle of the display device. Figure 11This is a schematic diagram of a cover plate for a display device according to a further variation of the first embodiment of the present invention. See also... Figure 11 This illustration shows an embodiment where an additional haze gradient zone is disposed between two adjacent sides of the visible area A. In this embodiment, the visible area A also has a diagonal fifth haze gradient zone Z5 and a diagonal sixth haze gradient zone Z6. The fifth haze gradient zone Z5 is located between the first side S1 and the third side S3 of the visible area A, and the sixth haze gradient zone Z6 is located between the first side S1 and the fourth side S4 of the visible area A. The fifth haze gradient zone Z5 extends along a fourth direction D4, which is located between the extension direction of the first side S1 (e.g., the second direction D2) and the extension direction of the third side S3 (e.g., the first direction D1). The sixth haze gradient zone Z6 extends along a fifth direction D5, which is located between the extension direction of the first side S1 and the extension direction of the fourth side S4 (e.g., the first direction D1). Selectively, the angles between the third direction and the fourth direction and the first direction D1 are greater than 0 degrees and less than 90 degrees. Similarly, the haze gradation methods of the fifth haze gradient zone Z5 and the sixth haze gradient zone Z6 can be as described above. Figure 4 as well as Figures 6 to 8 Any form of haze variation is permitted, but not limited to this. For example, the haze of the fifth haze gradient zone Z5 can vary along the fourth direction D4 (e.g., the haze of the fifth haze gradient zone Z5 gradually decreases, increases, or first decreases then increases, or first increases then decreases along the fourth direction D4), and the haze of the sixth haze gradient zone Z6 can vary along the fifth direction D5 (e.g., the haze of the sixth haze gradient zone Z6 gradually decreases, increases, or first decreases then increases, or first increases then decreases along the fifth direction D5). By providing oblique haze gradient zones between two adjacent sides of the visible area A, the problem of oblique angled bright and dark spray areas caused by the light source side is solved.
[0044] In summary, based on light leakage, brightness / darkness, color difference, etc., a haze gradient zone can be provided on at least one of the first side S1, the second side S2, the third side S3, the fourth side S4, and between two adjacent sides, and the haze can gradually decrease. Figure 4 ), gradually increasing ( Figure 6 First decrease, then increase ( Figure 7 ), and gradually increasing then gradually decreasing ( Figure 8 ).
[0045] Figure 13 This is a schematic diagram of a display device according to a second embodiment of the present invention. Figure 14This is a schematic diagram of the front light module of a display device according to a second embodiment of the present invention. Figure 15 This is a schematic diagram of the cover plate of the display device according to a second embodiment of the present invention. Figure 16 This is a partial cross-sectional schematic diagram of a display device according to a second embodiment of the present invention. It should be noted that... Figure 16 The front light module and cover of the display device are shown, but the display panel is omitted. (See reference...) Figures 13 to 16 In another embodiment, the present invention provides a display device 100A, which is substantially the same as the display device 100, except that the front light module 2A of the display device 100A further includes a second light source 23, which is disposed on the opposite side of the first light source 22 (i.e., the first light source 22 and the second light source 23 are respectively disposed on opposite sides of the light guide plate 21). The second light source 23 includes at least one light-emitting element 23a, such as a light-emitting diode. Optionally, the second light source 23 may be a light strip or a light panel. The second light source 23 further includes a substrate 23b, and the light-emitting element 23a is disposed on the substrate 23b. The second haze gradient zone Z2 is located on the same side of the display device 100A as the second light source 23 to improve the peripheral color difference, bright and dark bands, and light leakage on the light-incident side of the display device 100A. Of course, the present invention is not limited to the second light source being disposed on the opposite side of the first light source. The second light source may also be disposed on at least one adjacent side of the first light source, or simultaneously disposed on the opposite side and at least one adjacent side of the first light source.
[0046] Figures 17 to 19 This is a schematic diagram of a cover plate for a display device with various modifications according to a second embodiment of the present invention. For example... Figures 17 to 18 As shown, in other embodiments, a haze gradient zone may be selectively provided on at least one of the third side S3 and the fourth side S4, and the haze gradient may be provided in the following manner: Figure 4 as well as Figures 6 to 8 The form of haze change for any of them. Then refer to... Figure 19Due to the influence of the position and emission angle of the light-emitting element of the second light source 23 of the front light module 2A, the front light module 2A may also generate a bright-dark jet area at an oblique angle near the second light source 23. Therefore, in this embodiment, the visible area A also has an oblique seventh haze gradient area Z7 and an oblique eighth haze gradient area Z8. The seventh haze gradient area Z7 is located between the second side S2 and the third side S3 of the visible area A, and the eighth haze gradient area Z8 is located between the second side S2 and the fourth side S4 of the visible area A. The extension direction of the seventh haze gradient area Z7 is located between the extension direction of the second side S2 (e.g., the second direction D2) and the extension direction of the third side S3 (e.g., the first direction D1), and the extension direction of the eighth haze gradient area Z8 is located between the extension direction of the second side S2 and the extension direction of the fourth side S4 (e.g., the first direction D1). Similarly, the haze gradient methods of the seventh haze gradient zone Z7 and the eighth haze gradient zone Z8 can be as described above. Figure 4 as well as Figures 6 to 8 Any form of haze variation, but not limited thereto. For example, the haze of either the seventh haze gradient zone Z7 or the eighth haze gradient zone Z8 may vary along its extension direction (e.g., the haze of either the seventh haze gradient zone Z7 or the eighth haze gradient zone Z8 may gradually decrease, gradually increase, or first decrease and then increase, or first increase and then decrease) along its extension direction.
[0047] In summary, the display device of the present invention improves light leakage, brightness / darkness, and color difference in the visible area near the light source by providing a haze gradient area on the side of the cover plate near the light source. Furthermore, depending on the light leakage, brightness / darkness, and color difference, a haze gradient area can also be provided on other sides of the cover plate not near the light source, or a haze gradient area can be provided between two adjacent sides to improve the problem of uneven brightness at the angle caused by the light source. In addition, the combination of the haze gradient area and the microstructure further minimizes light leakage.
[0048] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A display device, characterized in that, The display device includes: A display panel; A front light module is disposed on the display panel, and the front light module includes a light guide plate and a first light source; and A cover plate is disposed on the light guide plate. The cover plate has a visible area and the visible area has a first haze gradient area, wherein the first haze gradient area is located on a first side of the visible area and the haze of the first haze gradient area changes along a first direction.
2. The display device as claimed in claim 1, characterized in that: The first haze gradient area and the first light source are located on the same side of the display device.
3. The display device as claimed in claim 1, characterized in that: The first direction is perpendicular to the first side.
4. The display device as claimed in claim 1, characterized in that: The fog level in the first fog level gradient zone gradually changes from a first fog level to a second fog level along the first direction, wherein the first fog level is greater than or less than the second fog level.
5. The display device as claimed in claim 4, characterized in that: The first fog level is greater than the second fog level, and the fog level in the first fog level gradient zone also gradually changes from the second fog level to a third fog level along the first direction, wherein the third fog level is greater than the second fog level.
6. The display device as claimed in claim 4, characterized in that: The first fog level is less than the second fog level, and the fog level in the first fog level gradient zone also gradually changes from the second fog level to a third fog level along the first direction, wherein the third fog level is less than the second fog level.
7. The display device as claimed in claim 1, characterized in that: The ratio of the length of the first haze gradient area in the first direction to the length of the visible area in the first direction is less than or equal to 1 / 3.
8. The display device as claimed in claim 1, characterized in that: The visible area also has a second haze gradient area, which is located on a second side of the visible area, relative to the first side, and the haze of the second haze gradient area changes in the opposite direction to the first direction.
9. The display device as claimed in claim 8, characterized in that: The front light module includes a second light source, and the second haze gradient area and the second light source are located on the same side of the display device.
10. The display device as claimed in claim 1, characterized in that: The visible area also has a third haze gradient area, which is located on a third side of the visible area. The third side is adjacent to the first side. The haze of the third haze gradient area changes along a second direction, and the second direction is not parallel to the first direction.
11. The display device as claimed in claim 10, characterized in that: The visible area also has a fourth haze gradient area, which is located on a fourth side of the visible area. The haze of the fourth haze gradient area changes along the second direction relative to the third side.
12. The display device as claimed in claim 10, characterized in that: The ratio of the length of the third haze gradient zone in the second direction to the length of the visible zone in the second direction is less than or equal to 1 / 3.
13. The display device as claimed in claim 11, characterized in that: The ratio of the length of the fourth haze gradient zone in the second direction to the length of the visible zone in the second direction is less than or equal to 1 / 3.
14. The display device as claimed in claim 1, characterized in that: The visible area also has a slanted haze gradient area, which is located between two adjacent sides of the visible area, and the extension direction of the slanted haze gradient area is between the respective extension directions of the two adjacent sides.
15. The display device as claimed in claim 1, characterized in that: The cover plate includes a substrate and a film layer. The film layer is disposed on a surface of the substrate and located in the first haze gradient region, and the haze of the film layer varies along the first direction.
16. The display device as claimed in claim 1, characterized in that: The cover plate includes a substrate having a first surface and a second surface, the first surface and the second surface being opposite to each other, at least one of the first surface and the second surface having a plurality of microstructures, and the microstructures being disposed in the first haze gradient region.