Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises: a color resistance layer, the color resistance layer comprising a plurality of color resistance unit groups arranged in sequence at intervals, each color resistance unit group comprising a plurality of color resistance units arranged in an array, the color resistance units being configured to transmit light; and a light transmission layer, the light transmission layer being arranged adjacent to a light exit side of the color resistance layer, the light transmission layer comprising a substrate and a plurality of diffusion groups arranged at intervals, the substrate being arranged opposite the color resistance layer, the plurality of diffusion groups being arranged on a side of the substrate away from the color resistance layer, each diffusion group comprising a plurality of diffusion portions, the diffusion portions being protruding or recessed from the substrate, and the diffusion portions being arranged at least partially opposite the color resistance units; when the display panel is in operation, light is incident on the light transmission layer via the color resistance layer, and then exits the display panel via the light transmission layer to a display surface of the display panel, the light has a first exit range via the color resistance layer, and the light has a second exit range via the light transmission layer, the second exit range being larger than the first exit range, thereby improving the display effect of the display panel at a side view angle.

Description

Display panel and display device Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] In the display product market, vertically aligned (VA) display panels are widely used due to their excellent image display performance. However, compared with advanced technologies such as organic light-emitting diode (OLED) and micro light-emitting diode (Micro LED) display panels, VA display panels still have shortcomings in terms of viewing experience from side angles.

[0003] When viewing a VA display panel from the side, users often encounter issues such as a yellowish tint and a sharp drop in contrast. These problems stem from the vertical alignment of liquid crystal molecules in the VA display panel. When viewed from the front, the vertical alignment of the liquid crystal molecules ensures high contrast. However, as the viewing angle shifts, the path of light passing through the liquid crystal layer changes, causing the polarization effect of the liquid crystal molecules on the light to weaken. This results in a significant decrease in the contrast of the display panel, leading to a loss of depth and detail in the image when viewed from the side. Summary of the Invention

[0004] In view of this, this application provides a display panel and a display device to improve the display effect of the display panel from a side viewing angle.

[0005] In a first aspect, this application provides a display panel, the display panel comprising:

[0006] A color resist layer, the color resist layer comprising a plurality of color resist units arranged in an array, the color resist units being used to transmit light; and

[0007] A light-transmitting layer is disposed adjacent to the light-emitting side of the color resist layer. The light-transmitting layer includes a substrate and a plurality of diffuser portions spaced apart. The plurality of diffuser portions are recessed or protruding on the side of the substrate opposite to the color resist layer. At least a portion of each diffuser portion is disposed directly opposite the color resist unit and is used to diffuse the light emitted from the color resist unit to the light-transmitting layer.

[0008] A polarizer is disposed on the side of the light-transmitting layer opposite to the color resist layer and is used to control the polarization direction of light.

[0009] When the display panel is working, light enters the light-transmitting layer through the color resist layer, and then exits the display surface of the display panel through the light-transmitting layer and the polarizer in sequence. The light has a first exit range through the color resist layer and a second exit range through the light-transmitting layer, and the second exit range is larger than the first exit range.

[0010] The diffusion portion protrudes from the substrate along a direction away from the color resist layer. The diffusion portion has a first end face and a second end face that are opposite to each other. The second end face is away from the substrate compared to the first end face. The second end face is parallel to the first end face. The area of ​​the second end face is smaller than the area of ​​the first end face. The orthographic projection of the second end face onto the substrate falls within the orthographic projection of the first end face onto the substrate.

[0011] The substrate includes a plurality of substrate portions arranged in an array, and the diffusion portion is disposed opposite to the substrate portion. Along a first direction, the diffusion portion has a maximum width D1, and the substrate portion has a maximum width D2, where D1 ≤ D2. Along a second direction, the diffusion portion has a maximum length L1, and the substrate portion has a maximum length L2, where L1 < L2. The second direction is perpendicular to the first direction.

[0012] The color resist layer includes a plurality of color resist unit groups spaced apart along a first direction, and the color resist unit group includes a plurality of color resist units arranged sequentially at intervals along a second direction. The diffusion portion extends along the second direction and is disposed directly opposite the plurality of color resist units. Both the first direction and the second direction are perpendicular to the arrangement direction of the color resist layer and the light-transmitting layer.

[0013] The diffusion section is formed by a first diffusion surface, a second diffusion surface, and a third diffusion surface that are bent and connected in sequence. The first diffusion surface is attached to the substrate, and the second diffusion surface and the third diffusion surface protrude from the substrate in a direction away from the color resist layer. The color resist unit has a first side and a second side arranged in a first direction, which is the arrangement direction of the second diffusion surface and the third diffusion surface. The second diffusion surface is spaced apart from the first side in the first direction, and the third diffusion surface is spaced apart from the second side in the first direction.

[0014] The diffusion portion is recessed into the surface of the substrate along the direction from the substrate to the color resist layer, and the orthographic projection of the diffusion portion onto the substrate falls within the orthographic projection of the color resist unit onto the substrate.

[0015] The display panel further includes a filling layer, which covers the surface of the light-transmitting layer opposite to the color resist layer. The surface of the filling layer opposite to the light-transmitting layer is parallel to the display surface of the display panel, and the polarizer is disposed on the side of the filling layer opposite to the light-transmitting layer.

[0016] The light-transmitting layer has a first refractive index n, and the filling layer has a second refractive index n'. The first refractive index n is greater than the second refractive index n', and the first refractive index n satisfies: 1.5≤n≤1.7, and the second refractive index n' satisfies: 1.3≤n'≤1.4.

[0017] The display panel further includes a black matrix, which is disposed on the side of the substrate adjacent to the color resist layer and between two adjacent color resist units, and is used to block the transmission of light.

[0018] Secondly, this application also provides a display device, the display device including a backlight module and the display panel, the backlight module being disposed opposite to the display panel, and the backlight module being used to provide a surface light source to the display panel.

[0019] The display panel provided in this embodiment includes a color resist layer and a light-transmitting layer. The light-transmitting layer includes a substrate and multiple diffusers, which protrude or are recessed into the substrate. The diffusers scatter light emitted from the color filter substrate side of the display panel at the pixel level, achieving the effects of expanding the viewing angle and improving viewing angle characteristics. Ultimately, this expands the range of light emitted from the display surface, thereby improving the image quality of the display panel when viewed from a wide viewing angle, i.e., improving the display image when viewed from the left or right side. Compared to designing a scattering function on the polarizer of the display panel to improve the viewing angle, the light-transmitting layer provides a more precise and direct improvement to the light emission viewing angle, effectively improving the viewing angle characteristics of the display panel and allowing users to clearly see the displayed content from different angles, thus effectively enhancing the image quality of the display panel and display device at side viewing angles. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the structure of a display device according to an embodiment of this application;

[0022] Figure 2 is a cross-sectional structural diagram of the display panel of the comparative embodiment of this application;

[0023] Figure 3 is a schematic diagram of the working principle of the display panel of the comparative embodiment of this application;

[0024] Figure 4 is a schematic cross-sectional view of the display panel along line AA in Embodiment 1 of this application;

[0025] Figure 5 is a schematic diagram of the working principle of the display panel in Embodiment 1 of this application;

[0026] Figure 6 is a schematic diagram of the working principle of the display panel in Embodiment 2 of this application;

[0027] Figure 7 is a top view of the structure of the light-transmitting layer in Embodiment 1 of this application;

[0028] Figure 8 is a schematic diagram of the cross-sectional structure of the light-transmitting layer along line BB provided in Figure 7;

[0029] Figure 9 is a schematic diagram of the light propagation path of the light-transmitting layer provided in Figure 8;

[0030] Figure 10 is a schematic diagram of the cross-sectional structure of the light-transmitting layer along the CC line provided in Figure 7;

[0031] Figure 11 is a schematic diagram of the light propagation path of the light-transmitting layer provided in Figure 10;

[0032] Figure 12 is a top view of the display panel structure according to Embodiment 1 of this application;

[0033] Figure 13 is a top view of the structure of the light-transmitting layer in Embodiment 2 of this application;

[0034] Figure 14 is a top view of the display panel structure of Embodiment 2 of this application;

[0035] Figure 15 is a schematic diagram of the cross-sectional structure of the display panel provided in Figure 14 along the DD line;

[0036] Figure 16 is a top view of the display panel structure according to Embodiment 3 of this application;

[0037] Figure 17 is a schematic diagram of the cross-sectional structure of the display panel along line EE provided in Figure 16;

[0038] Figure 18 is a schematic cross-sectional view of the display panel along line AA in Embodiment 2 of this application;

[0039] Figure 19 is a schematic cross-sectional view of the display panel along line AA in Embodiment 3 of this application;

[0040] Figure 20 is a schematic cross-sectional view of the display panel along line AA in Embodiment 4 of this application;

[0041] Figure 21 is a schematic cross-sectional view of the display panel along line AA in Embodiment 5 of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1-Display device, 10-Display panel, 20-Backlight module, 11-Color resist layer, 12-Light transmittance layer, 13-Polarizer, 14-Filling layer, 15-Black matrix, 16-First side, 17-Second side, 111-Color resist unit group, 121-Substrate, 122-Diffuser portion, 1111-Color resist unit, 1211-Substrate portion, 1221-First end face, 1222-Second end face, 1223-First diffusion surface, 1224-Second diffusion surface, 1225-Third diffusion surface, 1226-Peripheral side surface, 111a-First side, 111b-Second side. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0046] In this document, references to "embodiment" or "implementation" mean that a particular feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] Before introducing the technical solution of this application, let's go over the technical issues in related technologies in detail.

[0048] Because the liquid crystal molecules in a vertically aligned (VA) display panel are vertically aligned, this vertical alignment ensures high contrast when viewed from the front. However, as the viewing angle changes, the path of light through the liquid crystal layer changes, causing the polarization effect of the liquid crystal molecules on the light to weaken. This results in a significant decrease in the contrast of the display panel, leading to a loss of depth and detail in the image when viewed from a wide viewing angle.

[0049] In known technologies, techniques such as glass etching or coating can be used on the color filter substrate side to improve the viewing effect of the display panel at a wide viewing angle. However, this requires an additional masking process and places requirements on the thickness and characteristics of the glass on the color filter substrate side, necessitating screening and increasing the manufacturing process time. Furthermore, the issue of accurate alignment must be considered; inaccurate alignment may result in insufficient viewing angle expansion or image distortion.

[0050] In view of this, to solve the above problems, this application provides a display panel 10. Please refer to Figures 1 to 6 together. The display panel 10 of this embodiment includes a color resist layer 11, a light-transmitting layer 12, and a polarizer 13. The color resist layer 11 includes a plurality of color resist units 1111 arranged in an array, and the color resist units 1111 are used to transmit light. The light-transmitting layer 12 is disposed adjacent to the light-emitting side of the color resist layer 11. The light-transmitting layer 12 includes a substrate 121 and a plurality of diffuser portions 122 disposed at intervals. The plurality of diffuser portions 122 are recessed or protruding on the side of the substrate 121 opposite to the color resist layer 11. The diffuser portions 122 are at least partially disposed opposite to the color resist units 1111 and are used to diffuse the light emitted from the color resist units 1111 to the light-transmitting layer 12. The polarizer 13 is disposed on the side of the light-transmitting layer 12 opposite to the color resist layer 11 and is used to control the polarization direction of the light. When the display panel 10 is working, light enters the light-transmitting layer 12 through the color resist layer 11, and then exits the display surface of the display panel 10 through the light-transmitting layer 12 and the polarizer 13 in sequence. The light has a first exit range through the color resist layer 11 and a second exit range through the light-transmitting layer 12, and the second exit range is larger than the first exit range.

[0051] The display panel 10 includes, but is not limited to, a Vertical Alignment (VA) panel, a Twisted Nematic (TN) panel, an In-Plane Switching (IPS) panel, a Multi-domain Vertical Alignment (MVA) panel, a Patterned Vertical Alignment (PVA) panel, or other types of display panels. In this embodiment, a Vertical Alignment (VA) panel is used as an example for illustration. It should be understood that the type of display panel 10 should not be a limitation of the display panel 10 provided in this embodiment.

[0052] Optionally, the display panel 10 includes an array substrate 121 and a color filter substrate 121 disposed opposite to each other, a color resist layer 11 disposed on the array substrate 121 or the color filter substrate 121, a light-transmitting layer 12 disposed on the color filter substrate 121, and the light-transmitting layer 12 and the color resist layer 11 are disposed opposite to each other.

[0053] Optionally, the color resist layer 11 includes a plurality of color resist units 1111 arranged in an array. The number of color resist units 1111 can be, but is not limited to, two, three, four, five, or other numbers.

[0054] Optionally, the color resist unit 1111 is used to transmit light and can filter the transmitted light. The color resist unit 1111 can be, but is not limited to, a red (R) color resist unit 1111, or a green (G) color resist unit 1111, or a blue (B) color resist unit 1111, or a color resist unit 1111 of other colors, etc.

[0055] Optionally, the material of the light-transmitting layer 12 may be glass, resin, polyester (PolyethyleneTerephthalate, PET), polyimide (Polyimide, PI), or other transparent materials.

[0056] Optionally, the polarizer 13 is disposed on the side of the light-transmitting layer 12 opposite to the color resist layer 11. In other words, the polarizer 13 is disposed adjacent to the display surface of the display panel 10 relative to the light-transmitting layer 12. The polarizer 13 is used to control the polarization direction of light. By selectively transmitting or blocking light with a specific polarization direction, the polarizer 13 can enhance the display effect of the display panel 10, making the image on the display panel 10 clearer and the colors more vibrant.

[0057] Optionally, during the operation of the display panel 10, light passes through the color resist unit 1111 and is emitted to the light-transmitting layer 12. After being diffused by the diffuser 122 in the light-transmitting layer 12, the light is emitted to the polarizer 13 and then emitted to the display surface of the display panel 10 via the polarizer 13.

[0058] Optionally, the light-transmitting layer 12 is disposed adjacent to the light-emitting side of the color resist layer 11, and in the display panel 10, the light-transmitting layer 12 is disposed adjacent to the display surface of the display panel 10 relative to the color resist layer 11. In the display panel 10, the direction of light propagation is that light enters the light-transmitting layer 12 through the pixel unit, and then exits the light-transmitting layer 12 to the display surface of the display panel 10.

[0059] Optionally, the number of the diffuser 122 may be, but is not limited to, two, three, four, five, or other numbers, and the multiple diffusers 122 may be arranged at intervals from each other.

[0060] Furthermore, in one optional embodiment of this application, the diffusion portion 122 protrudes from the substrate 121 along a direction away from the color resist unit 1111. In another optional embodiment of this application, the diffusion portion 122 is recessed into the substrate 121 along a direction adjacent to the color resist unit 1111.

[0061] Optionally, the diffuser 122 is disposed directly opposite the color resist unit 1111, meaning that the orthographic projection of the diffuser 122 onto the substrate 121 falls within the range of the orthographic projection of the color resist unit 1111 onto the substrate 121. The diffuser 122 can diffuse the light emitted through the color resist unit 1111. Specifically, on the interface of the diffuser 122 facing away from the color resist unit 1111, since the diffuser 122 is convex or recessed into the substrate 121, the interface of the diffuser 122 facing away from the color resist unit 1111 is not a plane but a curved interface. Therefore, when light enters other media through the curved interface of the diffuser 122, it will be refracted or scattered, causing a change in the light emission angle and expanding the light emission range.

[0062] Furthermore, the light emitted through the diffuser 122 can be, but is not limited to, diffused in a direction adjacent to or away from the central axis of the diffuser 122. When the light emitted from the diffuser 122 converges in a direction adjacent to the central axis of the diffuser 122, it then diffuses in a peripheral direction towards the display panel 10 after convergence. When the light emitted from the diffuser 122 diffuses in a direction away from the central axis of the diffuser 122, it does not converge but diffuses directly in a peripheral direction towards the display panel 10. Under the action of the diffuser 122, the emission range of light after passing through the light-transmitting layer 12 can be expanded.

[0063] Optionally, the diffuser 122 can be configured one-to-one with the color resist unit 1111, thereby scattering the light emitted from the display panel 10 on the color filter substrate 121 side at the pixel level. The diffuser 122 can also be a grid structure. When the diffuser 122 is a grid structure, a single diffuser 122 can simultaneously correspond to multiple color resist units 1111. In other words, the orthographic projection of the diffuser 122 on the substrate 121 simultaneously falls within the range of the orthographic projection of multiple color resist units 1111 on the substrate 121.

[0064] The shape of the diffuser 122 can be, but is not limited to, a frustum, a pyramid, a cylinder, a prism, or other shapes.

[0065] Optionally, light has a first emission range through the color resist layer 11 and a second emission range through the light transmittance layer 12, the second emission range being larger than the first emission range. Specifically, light has an emission surface after emitting from the display surface of the display panel 10. The emission surface is located on the side of the display surface opposite to the light transmittance layer 12 and is parallel to the display surface. Light has a first emission range when it passes through the color resist unit 1111 and does not exit to the emission surface through the diffuser 122. Light has a second emission range when it exits to the emission surface through the color resist unit 1111 and the diffuser 122, and the area of ​​the second emission range is larger than the area of ​​the first emission range. That is, the arrangement of the diffuser 122 can expand the emission range of light, so that the display effect of the display panel 10 is effectively improved when viewed from a side view, thus avoiding the problem of severe decrease in image contrast due to excessive light loss at the side view.

[0066] Optionally, the diffuser 122 is disposed on the side of the substrate 121 opposite to the color resist layer 11, that is, the diffuser 122 pattern is designed on the surface of the light-transmitting layer 12 near the human eye. This not only allows for optical design and utilization of the light-transmitting layer 12, but also facilitates precise alignment of the light-transmitting layer 12 with the color resist layer 11. Moreover, compared to contrast implementations that design scattering functions on the polarizer 13 of the display panel 10 to improve viewing angle, the light emitted from the color resist unit 1111 can directly enter the light-transmitting layer 12, and the viewing angle is adjusted via the light-transmitting layer 12, making it easier to calculate and design the viewing angle adjustment range of the light. Understandably, if a scattering function is designed on the polarizer 13, the light emitted from the color resist unit 1111 will first pass through other dielectric layers before entering the polarizer 13, such as through a glass or resin medium. At this point, the light incident on the polarizer 13 has already been deflected, making it difficult to control the viewing angle by calculating and designing the shape, height, or interface curvature of the diffuser 122. In this embodiment, the light-transmitting layer 12 is positioned adjacent to the color resist unit 1111 compared to the polarizer 13, allowing most of the light emitted from the color resist unit 1111 to directly enter the light-transmitting layer 12. This facilitates the calculation and design of the shape, height, or interface curvature of the diffuser 122, enabling more precise control over the light's viewing angle expansion and diffusion range.

[0067] In summary, the display panel 10 provided in this embodiment includes a color resist layer 11 and a light-transmitting layer 12. The light-transmitting layer 12 includes a substrate 121 and a plurality of diffuser portions 122, which protrude or are recessed into the substrate 121. The diffuser portions 122 scatter the light emitted from the display panel 10 at the color filter substrate 121 side at the pixel level, thereby expanding the viewing angle and improving the viewing angle characteristics. Ultimately, this expands the range of light emitted from the display surface, thereby improving the image quality of the display panel 10 when viewed from a wide viewing angle, i.e., improving the display image when viewed from the left or right side. Compared to designing a scattering function on the polarizer 13 of the display panel 10 to improve the viewing angle, the light-transmitting layer 12 can improve the light emission viewing angle more precisely and directly, thereby effectively improving the viewing angle characteristics of the display panel 10. This allows users to clearly see the displayed content from different angles, effectively improving the image quality of the display panel 10 at side viewing angles.

[0068] Please refer to Figures 4, 7, 8, 9, 10, and 11. The diffusion portion 122 protrudes from the substrate 121 along a direction away from the color resist layer 11. The diffusion portion 122 has a first end face 1221 and a second end face 1222 disposed opposite to each other. The second end face 1222 is away from the substrate 121 relative to the first end face 1221. The second end face 1222 is parallel to the first end face 1221. The area of ​​the second end face 1222 is smaller than the area of ​​the first end face 1221, and the orthographic projection of the second end face 1222 onto the substrate 121 falls within the orthographic projection of the first end face 1221 onto the substrate 121.

[0069] Optionally, the diffusion portion 122 is shaped like a frustum or approximately a frustum. Specifically, the diffusion portion 122 protrudes from the substrate 121 along the direction from the color resist layer 11 to the transparent layer. The diffusion portion 122 has a first end face 1221 and a second end face 1222 that are opposite to each other and parallel to each other. The first end face 1221 is circular or approximately circular in shape, and the second end face 1222 is circular or approximately circular in shape.

[0070] Optionally, the first end face 1221 is disposed in contact with the substrate 121, and the second end face 1222 is disposed opposite to the substrate 121 relative to the first end face 1221. Furthermore, the area of ​​the second end face 1222 is smaller than the area of ​​the first end face 1221. The area of ​​the first end face 1221 can be understood as the area of ​​its orthographic projection onto the substrate 121, and the area of ​​the second end face 1222 can be understood as the area of ​​its orthographic projection onto the substrate 121.

[0071] Optionally, the diffusion portion 122 further has a peripheral side surface 1226, one end of which is bent and connected to the first end face 1221, and the other end of which is bent and connected to the second end face 1222. The peripheral side surface 1226 is inclinedly disposed on the surface of the substrate 121.

[0072] Optionally, after light exits from the diffuser 122, it is incident on air or another medium with a different refractive index than the diffuser 122. In other words, the refractive index of the diffuser 122 is greater than that of air, and when the display panel 10 provides a filling medium on the side of the diffuser 122 away from the substrate 121, the refractive index of the diffuser 122 is greater than or less than the refractive index of the filling medium.

[0073] Understandably, when light enters the frustum-shaped diffuser 122 directly, the light is refracted when it exits through the peripheral side surface 1226 of the diffuser 122. Since the peripheral side surface 1226 is inclined to the incident direction of the light and the refractive index of the propagation medium changes, the light will be refracted when it exits through the peripheral side surface 1226. Since the second end face 1222 is perpendicular to the incident direction of the light, the light can at least partially maintain the direct direction of exit when it exits through the second end face 1222.

[0074] Understandably, when the refractive index of the diffuser 122 is greater than the refractive index of the filling medium, the light emitted through the peripheral side 1226 of the diffuser 122 is first refracted toward the position of the central axis of the diffuser 122, and then converged and diffused.

[0075] In this embodiment, the diffuser 122 is frustum-shaped or approximately frustum-shaped, so that the light incident on the diffuser 122 is refracted on the peripheral side surface 1226, thereby changing the exit angle and exit range of the light, and thus improving the display effect of the display panel 10 at the side view angle. Moreover, the light emitted through the second end surface 1222 of the diffuser 122 can at least partially maintain the effect of direct emission, so that the display panel 10 will not produce abnormalities at the front view angle, avoiding display distortion and color abnormalities at the front view angle, thereby ensuring that the display panel 10 has excellent display effect at all viewing angles.

[0076] Please refer to Figures 12 and 13. The substrate 121 includes a plurality of substrate portions 1211 arranged in an array. The diffusion portion 122 is disposed opposite to the substrate portion 1211. Along the first direction X, the diffusion portion 122 has a maximum width D1, and the substrate portion 1211 has a maximum width D2, where D1 ≤ D2. Along the second direction Y, the diffusion portion 122 has a maximum length L1, and the substrate portion 1211 has a maximum length L2, where L1 < L2. The second direction Y is perpendicular to the first direction X.

[0077] Optionally, the plurality of substrate portions 1211 are integrally formed.

[0078] Optionally, the number of substrate portions 1211 may be, but is not limited to, two, three, four, five, or other numbers, and the number of substrate portions 1211 is equal to the number of diffusion portions 122, and the substrate portions 1211 and the diffusion portions 122 are arranged in a one-to-one correspondence.

[0079] Optionally, the first direction X is perpendicular to the direction from the color resist layer 11 to the light-transmitting layer 12, the second direction Y is perpendicular to the direction from the color resist layer 11 to the light-transmitting layer 12, and the second direction Y is perpendicular to the first direction X.

[0080] Optionally, the maximum width D1 can be understood as the maximum distance between any two points of the diffuser portion 122 along the first direction X. The maximum width D2 can be understood as the maximum distance between any two points of the substrate portion 1211 along the first direction X.

[0081] Optionally, the maximum length L1 can be understood as the maximum distance between any two points of the diffuser portion 122 along the second direction Y. The maximum length L2 can be understood as the maximum distance between any two points of the substrate portion 1211 along the second direction Y.

[0082] Wherein, the maximum width D1 of the diffusion portion 122 and the maximum width D2 of the substrate portion 1211 satisfy: D1 ≤ D2, and the maximum length L1 of the diffusion portion 122 and the maximum length L2 of the substrate portion 1211 satisfy: L1 < L2. In this embodiment, an example is given where the maximum width D1 of the diffusion portion 122 is equal to the maximum width D2 of the substrate portion 1211, and the maximum length L1 of the diffusion portion 122 is less than the maximum length L2 of the substrate portion 1211.

[0083] Optionally, the display panel 10 further has a first side 16 and a second side 17 that are bent and connected. The first side 16 is the top or bottom side of the display panel 10, and the second side 17 is a side of the display panel 10. The length of the first side 16 is greater than or less than the length of the second side 17, and the first direction X is parallel to the first side 16, and the second direction Y is parallel to the second side 17. In other words, the long side of the substrate portion 1211 is parallel to the second side 17 of the display panel 10, and the short side of the substrate portion 1211 is parallel to the first side 16 of the display panel 10. In this embodiment, the width of the diffuser portion 122 in the first direction X is equal to the width of the substrate portion 1211, so that more light emitted from the left and right sides of the display panel 10 can be diffused by the diffuser portion 122. Furthermore, the length of the diffuser portion 122 in the second direction Y is less than the length of the substrate portion 1211, so that more light can be emitted directly from the top and bottom sides of the display panel 10. This improves the side-view display effect of the display panel 10 while ensuring the normal display state of the display panel 10 in the front-view view.

[0084] The upper and lower sides of the display panel 10 can be understood as the top and bottom sides of the display panel 10. The two functional sides of the display panel 10 can be understood as the two sides of the display panel 10 perpendicular to the top and bottom sides.

[0085] Please refer to Figures 14 and 15. The color resist layer 11 includes a plurality of color resist unit groups 111 spaced apart along a first direction X. The color resist unit group 111 includes a plurality of color resist units 1111 arranged sequentially at intervals along a second direction Y. The diffusion portion 122 extends along the second direction Y and is disposed directly opposite the plurality of color resist units 1111. Both the first direction X and the second direction Y are perpendicular to the arrangement direction of the color resist layer 11 and the light-transmitting layer 12.

[0086] Optionally, the number of color resist unit groups 111 can be, but is not limited to, two, three, four, five, or other numbers.

[0087] Optionally, the diffusion portion 122 has a strip-shaped structure, and the diffusion portion 122 is simultaneously disposed opposite to multiple color resist units 1111. In other words, the diffusion portion 122 covers multiple color resist units 1111 in the orthogonal projection of the color resist layer 11.

[0088] Optionally, the plurality of diffuser portions 122 constitute a grid-like strip structure, and the shape of the diffuser portion 122 can be, but is not limited to, a cylinder or a prism. When the diffuser portion 122 is a cylinder, its cross-section along the arrangement direction of the color resist layer 11 and the light-transmitting layer 12 is semi-circular, semi-elliptical, partially circular, or partially elliptical. When the diffuser portion 122 is a prism, its cross-section along the arrangement direction of the color resist layer 11 and the light-transmitting layer 12 is trapezoidal or triangular.

[0089] Optionally, the extension direction of the diffuser 122 is parallel to the side direction of the display panel 10; in other words, the first direction X is the extension direction of the side of the display panel 10.

[0090] In this embodiment, the plurality of diffuser portions 122 form a grid-shaped strip structure, and the diffuser portions 122 are disposed opposite to the plurality of color resist units 1111, thereby enabling simultaneous diffusion of light to the plurality of color resist units 1111. This not only simplifies and improves the manufacturing process of the diffuser portions 122, but also reduces or avoids the influence of the diffuser portions 122 on the display effect of the display panel 10 at the front viewing angle.

[0091] Please refer to Figures 16 and 17. The diffusion portion 122 is formed by a first diffusion surface 1223, a second diffusion surface 1224, and a third diffusion surface 1225 that are bent and connected in sequence. The first diffusion surface 1223 is attached to the substrate 121. The second diffusion surface 1224 and the third diffusion surface 1225 protrude from the substrate 121 in a direction away from the color resist layer 11. The color resist unit 1111 has a first side 111a and a second side 111b arranged along a first direction X. The first direction X is the arrangement direction of the second diffusion surface 1224 and the third diffusion surface 1225. The second diffusion surface 1224 is spaced apart from the first side 111a along the first direction X, and the third diffusion surface 1225 is spaced apart from the second side 111b along the first direction X.

[0092] Optionally, the diffuser 122 is prism in shape, and the prism is a triangular prism. Understandably, the angle between the first diffuser surface 1223 and the second diffuser surface 1224 is an acute angle, the angle between the second diffuser surface 1224 and the third diffuser surface 1225 is an acute angle, and the angle between the third diffuser surface 1225 and the first diffuser surface 1223 is also an acute angle.

[0093] Optionally, the first diffusion surface 1223 is attached to the surface of the substrate 121. The second diffusion surface 1224 and the third diffusion surface 1225 protrude from the surface of the substrate 121 in a direction away from the color resist layer 11. Light enters the diffusion portion 122 via the first diffusion surface 1223, and then exits via the second diffusion surface 1224 or the third diffusion surface 1225.

[0094] Optionally, light enters the diffuser 122 directly along the arrangement direction of the color resist layer 11 and the light-transmitting layer 12, with the first diffuser surface 1223 inclined to the direction of direct light transmission and the second diffuser surface 1224 inclined to the direction of direct light transmission. Therefore, light can be refracted when it exits through the first diffuser surface 1223 or the second diffuser surface 1224, thereby expanding the light emission range.

[0095] Optionally, the second diffusion surface 1224 is disposed at intervals along the first direction X on the first side 111a, and the third diffusion surface 1225 is disposed at intervals along the first direction X on the second side 111b. Furthermore, the diffusion portion 122 is disposed at intervals from the side of the orthographic projection of the substrate 121 to the side of the color resist unit 1111 disposed at intervals along the side of the orthographic projection of the substrate 121.

[0096] In this embodiment, the second diffusion surface 1224 is spaced apart along the first direction X on the first side 111a, and the third diffusion surface 1225 is spaced apart along the first direction X on the second side 111b, thereby leaving a gap between the two ends of the diffusion section 122 and the color resist unit 1111. Within the gap between the diffusion section 122 and the color resist unit 1111, light can remain directly incident or maintain its original light propagation path, thereby reducing the impact of the diffusion section 122 on the display effect of the display panel 10 at a normal viewing angle and avoiding display distortion and color abnormalities in the display panel 10.

[0097] Please refer to Figures 18, 19 and 20. The diffusion portion 122 is recessed in the surface of the substrate 121 along the direction of the substrate 121 toward the color resist layer 11, and the orthographic projection of the diffusion portion 122 onto the substrate 121 falls within the orthographic projection of the color resist unit 1111 onto the substrate 121.

[0098] Optionally, the diffusion portion 122 is recessed on the surface of the substrate 121 along the direction of the substrate 121 toward the color resist layer 11. This can be understood as the substrate 121 forming a groove on the side away from the color resist layer 11.

[0099] Optionally, light rays emitted from the diffuser 122 can enter either air or the filling medium of the display panel 10. Furthermore, the refractive index of the diffuser 122 is greater than that of air, or the refractive index of the diffuser 122 is not equal to that of the filling medium. This allows light rays to be refracted or scattered at the interface where the groove is formed on the substrate 121, thus expanding the light emission range.

[0100] Optionally, the diffusion portion 122 is positioned so that its orthographic projection onto the substrate 121 falls within the orthographic projection of the color resist unit 1111 onto the substrate 121, that is, the diffusion portion 122 is positioned directly opposite the color resist unit 1111.

[0101] In this embodiment, the diffusion portion 122 is recessed into the surface of the substrate 121, so that the thickness of the display panel 10 is not increased when expanding the viewing angle and improving the viewing angle characteristics of the display panel 10. This allows the display panel 10 to improve the display quality from the side viewing angle while also meeting the design requirements of thinness and lightness, thereby effectively improving the user experience.

[0102] Please refer to Figure 4 again. The display panel 10 also includes a filling layer 14, which covers the surface of the light-transmitting layer 12 away from the color resist layer 11. The surface of the filling layer 14 away from the light-transmitting layer 12 is parallel to the display surface of the display panel 10, and the polarizer 13 is disposed on the side of the filling layer 14 away from the light-transmitting layer 12.

[0103] Optionally, the filler layer 14 may be made of resin, polycarbonate (PC), polymethyl methacrylate (PMMA), or other transparent materials.

[0104] Optionally, the filling layer 14 covers the surface of the diffuser 122 opposite to the color resist unit 1111 to fill the gap between the diffusers 122, thereby facilitating the attachment of a polarizer 13 or other optical elements on the side of the filling layer 14 opposite to the diffuser 122.

[0105] Alternatively, the refractive index of the filling layer 14 is greater than or less than the refractive index of the diffuser 122, so that the light emitted from the diffuser 122 can diffuse or diffuse after converging, thereby enabling the display panel 10 to have good image display effect from both the front and side viewing angles.

[0106] Please refer to Figure 21. In an optional embodiment of this application, the filling layer 14 may further include air. Air typically has a refractive index of 1.00029. Due to the relatively low refractive index of air, the difference in refractive index between the diffuser 122 and air is relatively large, thereby allowing light to diffuse more fully after entering the filling layer 14 via the diffuser 122.

[0107] Optionally, when the filling layer 14 is air, a glass cover plate can be provided on the side of the diffuser 122 opposite to the substrate 121, and the polarizer 13 can be attached to the glass cover plate on the side opposite to the diffuser 122 to ensure that the polarizer 13 can be attached flat. The glass cover plate can be adhered to the diffuser 122 using an edge-sealing method, or it can be fixed to the mid-frame or other supporting components of the display panel 10. Furthermore, the glass cover plate can be offset relative to the diffuser 122, and the positional accuracy of the glass cover plate will not affect the light emission of the diffuser 122, thereby facilitating the fabrication of the display panel 10.

[0108] Optionally, the light-transmitting layer 12 has a first refractive index n, and the filling layer 14 has a second refractive index n', wherein the first refractive index n is greater than the second refractive index n', and the first refractive index n satisfies: 1.5≤n≤1.7, and the second refractive index n' satisfies: 1.3≤n'≤1.4.

[0109] Optionally, the refractive index n of the diffuser 122 can be, but is not limited to, 1.5, 1.52, 1.53, 1.55, 1.56, 1.58, 1.6, 1.62, 1.64, 1.65, 1.66, 1.68, 1.7, or other values, as long as 1.5 ≤ n ≤ 1.7.

[0110] Optionally, the refractive index n' of the filling layer 14 can be, but is not limited to, 1.3, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1.37, 1.38, 1.39, 1.4 or other values, as long as 1.3 ≤ n' ≤ 1.4.

[0111] In this embodiment, the refractive index n satisfies: 1.5≤n≤1.7, and the refractive index n' satisfies: 1.3≤n'≤1.4, so that there is a sufficient difference in refractive index between the diffuser 122 and the filling part, thereby enabling light to be effectively diffused when it is incident from the diffuser 122 to the filling part, and thus effectively improving the image quality of the display panel 10 when viewed from a wide viewing angle.

[0112] Please refer to Figure 4 again. The display panel 10 also includes a black matrix 15, which is disposed on the side of the substrate 121 adjacent to the color resist layer 11, and is disposed between two adjacent color resist units 1111, and is used to block the transmission of light.

[0113] Optionally, there are multiple black matrices 15, and each black matrix 15 is disposed between two adjacent color resist units 1111, serving to prevent color mixing between two adjacent color resist units 1111, thereby improving the contrast of the display panel 10. Furthermore, the black matrix 15 can prevent light leakage from the display panel 10, thereby reducing light crosstalk and improving the display quality of the display panel 10.

[0114] Optionally, the diffusion portion 122 includes, but is not limited to, being formed on the surface of the substrate 121 by processes such as dispensing, etching, or die casting. Specifically, in one embodiment of this application, the diffusion portion 122 can be directly dispensed onto the substrate 121 at the position corresponding to the color resist unit 1111 using a dispensing method. In another embodiment of this application, the diffusion portion 122 can be processed using an etching process, including first coating the substrate 121 with an ultraviolet light (UV) curable adhesive, then designing a mask, then curing the UV adhesive, cleaning, and using hydrofluoric acid to etch and remove the UV adhesive. In yet another embodiment of this application, the diffusion portion 122 made of resin material can also be processed using a die casting process, including coating the surface of the substrate 121 opposite to the color resist unit 1111 with a layer of resin-based flexible transparent material, and then extruding the pattern using a mold.

[0115] Please refer to Figure 1. This application also provides a display device 1, which includes a backlight module 20 and a display panel 10. The backlight module 20 is disposed opposite to the display panel 10, and the backlight module 20 is used to provide a surface light source to the display panel 10.

[0116] The display device 1 can be, but is not limited to, a smartphone, mobile phone, navigation device, television (TV), car audio system, laptop, tablet computer, portable multimedia player (PMP), personal digital assistant (PDA), and other devices with display functions. It should be understood that the functional type of the display device 1 should not be construed as a limitation on the display device 1 provided in this embodiment.

[0117] Optionally, the backlight module 20 is disposed on the side of the color resist layer 11 away from the light-transmitting layer 12, and the backlight module 20 can emit light to the display panel 10 and provide a surface light source for the display panel 10.

[0118] In this embodiment, the display device 1 includes the display panel 10. The display panel 10, through the arrangement of the diffuser 122, achieves the effect of expanding the viewing angle and improving the viewing angle characteristics, and ultimately expands the range of light emitted from the display surface, thereby improving the picture quality of the display panel 10 and the display device 1 when viewed from a side view, so that users can clearly see the display content from different angles, thereby effectively improving the user experience.

[0119] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form yet another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A display panel, characterized in that, The display panel includes: a color resist layer comprising a plurality of color resist units arranged in an array, the color resist units being used to transmit light; and a light-transmitting layer disposed adjacent to the light-emitting side of the color resist layer, the light-transmitting layer comprising a substrate and a plurality of diffusers disposed at intervals, the plurality of diffusers being recessed or protruding on the side of the substrate opposite to the color resist layer, the diffusers being at least partially disposed opposite to the color resist units and used to diffuse the light emitted from the color resist units to the light-transmitting layer; and a polarizer disposed on the side of the light-transmitting layer opposite to the color resist layer and used to control the polarization direction of the light; when the display panel is operating, light enters the light-transmitting layer through the color resist layer, and then sequentially passes through the light-emitting side of the substrate and the light-transmitting layer. The light layer and the polarizer are emitted onto the display surface of the display panel. The light has a first emission range through the color resist layer and a second emission range through the light-transmitting layer, and the second emission range is larger than the first emission range. The display panel also includes a filling layer, which is located on the side of the light-transmitting layer away from the color resist layer. The polarizer is disposed on the side of the filling layer away from the light-transmitting layer. The filling layer includes air. A glass cover is disposed on the side of the diffuser away from the substrate. The polarizer is attached to the side of the glass cover away from the diffuser to ensure that the polarizer is flatly attached. The light-transmitting layer has a first refractive index n, which satisfies: 1.5 ≤ n ≤ 1.

7.

2. The display panel as described in claim 1, characterized in that, The diffusion portion protrudes from the substrate along a direction away from the color resist layer. The diffusion portion has a first end face and a second end face that are opposite to each other. The second end face is away from the substrate compared to the first end face. The second end face is parallel to the first end face. The area of ​​the second end face is smaller than the area of ​​the first end face. The orthographic projection of the second end face onto the substrate falls within the orthographic projection of the first end face onto the substrate.

3. The display panel as described in claim 2, characterized in that, The substrate includes a plurality of substrate portions arranged in an array. The diffusion portion is disposed opposite to the substrate portion. Along a first direction, the diffusion portion has a maximum width D1, and the substrate portion has a maximum width D2, where D1 ≤ D2. Along a second direction, the diffusion portion has a maximum length L1, and the substrate portion has a maximum length L2, where L1 < L2. The second direction is perpendicular to the first direction.

4. The display panel as described in claim 1, characterized in that, The color resist layer includes a plurality of color resist unit groups spaced apart along a first direction. Each color resist unit group includes a plurality of color resist units arranged sequentially at intervals along a second direction. The diffusion portion extends along the second direction and is positioned directly opposite the plurality of color resist units. Both the first direction and the second direction are perpendicular to the arrangement direction of the color resist layer and the light-transmitting layer.

5. The display panel as described in claim 4, characterized in that, The diffusion section is formed by a first diffusion surface, a second diffusion surface, and a third diffusion surface that are bent and connected in sequence. The first diffusion surface is attached to the substrate, and the second diffusion surface and the third diffusion surface protrude from the substrate in a direction away from the color resist layer. The color resist unit has a first side and a second side arranged in a first direction. The first direction is the arrangement direction of the second diffusion surface and the third diffusion surface. The second diffusion surface is spaced apart from the first side in the first direction, and the third diffusion surface is spaced apart from the second side in the first direction.

6. The display panel as described in claim 1, characterized in that, The diffusion portion is recessed on the surface of the substrate along the direction from the substrate to the color resist layer, and the orthographic projection of the diffusion portion on the substrate falls within the orthographic projection of the color resist unit on the substrate.

7. The display panel as described in claim 1, characterized in that, The surface of the filling layer opposite to the light-transmitting layer is parallel to the display surface of the display panel.

8. The display panel as described in claim 1, characterized in that, The display panel also includes a black matrix, which is disposed on the side of the substrate adjacent to the color resist layer and between two adjacent color resist units, and is used to block the transmission of light.

9. A display device, characterized in that, The display device includes a backlight module and a display panel as described in any one of claims 1 to 8, wherein the backlight module is disposed opposite to the display panel, and the backlight module is used to provide a surface light source to the display panel.

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