Display panel and display device

Abstract

This application discloses a display panel and a display device. The display panel includes an array substrate on the light-incident side and a counter-mount substrate and a liquid crystal layer on the light-emitting side. The array substrate includes a first substrate and a color resist layer, the color resist layer including multiple color resists, the colors of which include at least red, green, and blue. The counter-mount substrate includes a second substrate, a dimming layer, and a black matrix layer. The dimming layer includes an auxiliary refractive layer and a refractive functional layer. The refractive functional layer has a lower transmittance for blue light than for red and green light. The auxiliary refractive layer is positioned corresponding to the blue color resist. The refractive functional layer covers the auxiliary refractive layer and the second substrate. The refractive functional layer includes a stacked first refractive layer and a second refractive layer. The first refractive layer is located on the side of the second refractive layer closer to the second substrate, and the refractive index of the first refractive layer is greater than that of the second refractive layer. The refractive index of the auxiliary refractive layer is greater than that of the first refractive layer. Through the above configuration, the problem of color shift at large viewing angles of the display panel can be solved.

Description

Technical Field

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

[0002] Thin-film transistor liquid crystal displays (TFT-LCDs) are a type of liquid crystal display that primarily uses thin-film transistor (TFT) technology to improve image quality. A liquid crystal display typically includes a display panel and a backlight. The display panel generally comprises an array substrate, a counter substrate, and a liquid crystal layer disposed between the two.

[0003] In existing technologies, the light emission rate of display panels is limited at wide viewing angles. When viewing the display panel from a large angle, it is difficult to see the original colors. The color shift of the display panel is more serious at wide viewing angles, and it is easy to have a yellowish tint at wide viewing angles. Summary of the Invention

[0004] This application mainly provides a display panel and display device to solve the problems of severe color shift and yellowish tint at wide viewing angles.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing a display panel, including an array substrate and a counter substrate disposed opposite to each other, and a liquid crystal layer disposed between the array substrate and the counter substrate, wherein the array substrate is located on the light-incident side of the display panel, and the counter substrate is located on the light-emitting side of the display panel.

[0006] The array substrate includes a first substrate and a color resist layer disposed on the first substrate near the liquid crystal layer; the color resist layer includes a plurality of spaced-apart color resists, and the colors of the color resists include at least red, green and blue;

[0007] The substrate includes a second substrate and a dimming layer and a black matrix layer sequentially disposed on the side of the second substrate near the liquid crystal layer; the black matrix layer includes a plurality of black matrices spaced apart from each other, and the black matrices are disposed at positions corresponding to the positions between two adjacent color resists;

[0008] The dimming layer includes an auxiliary refractive layer and a refractive functional layer. The refractive functional layer has a lower transmittance for blue light than for red and green light. The auxiliary refractive layer corresponds to a blue color resist and is located on the side of the auxiliary refractive layer away from the second substrate, covering both the auxiliary refractive layer and the second substrate. The refractive functional layer includes a first refractive layer and a second refractive layer stacked together. The first refractive layer is located on the side of the second refractive layer closer to the second substrate, and the refractive index of the first refractive layer is greater than that of the second refractive layer. The refractive index of the auxiliary refractive layer is greater than that of the first refractive layer.

[0009] In some embodiments, the first refractive layer includes a base and a plurality of spaced-apart protrusions; the base covers the portion of the second substrate not covered by the auxiliary refractive layer, and the protrusions are located on the side of the base and the auxiliary refractive layer away from the second substrate;

[0010] The side of the protrusion is located between two adjacent black matrices.

[0011] In some embodiments, the width of the protrusion gradually increases along the direction from the array substrate to the counter substrate;

[0012] The longitudinal section of the protrusion is in the shape of an inverted trapezoid, and the angle between the side of the protrusion and the second substrate is 70°-85°.

[0013] In some embodiments, the protrusion corresponds to the color resist setting, and the width of the protrusion is less than the distance between two adjacent black matrices;

[0014] Alternatively, the protrusion may be positioned corresponding to the black matrix, and the width of the protrusion may be greater than the width of the black matrix.

[0015] In some embodiments, the surface of the base away from the second substrate is flush with the surface of the auxiliary refractive layer away from the second substrate; the width of the auxiliary refractive layer is greater than or equal to the width of the blue color resist.

[0016] In some embodiments, the auxiliary refractive layer has a rectangular cross-sectional shape, and the surface of the auxiliary refractive layer near the second substrate is planar;

[0017] Alternatively, the auxiliary refractive layer may be shaped like a convex lens, with the surface of the auxiliary refractive layer near the second substrate being arc-shaped and protruding towards the second substrate;

[0018] Alternatively, the auxiliary refractive layer may be in the shape of a triangular pyramid, with a triangular longitudinal section and a folded surface near the second substrate.

[0019] In some embodiments, the driving circuit layer includes a plurality of thin-film transistors spaced apart from each other, and the black matrix is ​​arranged corresponding to the thin-film transistors;

[0020] The array substrate further includes a first transparent conductive layer, which is disposed on the side of the color resist layer away from the first substrate and is electrically connected to the thin film transistor through a via; the array substrate further includes a second transparent conductive layer, which is disposed on the side of the black matrix layer away from the second substrate and covers the black matrix and the second refractive layer.

[0021] The display panel further includes a first polarizer disposed on the side of the array substrate away from the counter substrate; and / or, the display panel further includes a second polarizer disposed on the side of the counter substrate away from the array substrate.

[0022] In some embodiments, the refractive index of the auxiliary refractive layer is 1.7-1.9; and / or,

[0023] The refractive index of the first refractive layer is 1.5-1.7; and / or,

[0024] The refractive index of the second refractive layer is 1.3-1.5.

[0025] In some embodiments, the first refractive layer is made of SiNx material, where X ≥ 1; and / or,

[0026] The auxiliary refractive layer is made of a composite resin material.

[0027] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide a display device, comprising:

[0028] Any of the display panels described above;

[0029] A backlight source is disposed on the side of the array substrate away from the opposing substrate, and is used to provide backlight for the display panel.

[0030] The beneficial effects of this application are as follows: Unlike existing technologies, this application discloses a display panel and a display device. The display panel includes an array substrate and a counter substrate disposed opposite each other, and a liquid crystal layer disposed between the array substrate and the counter substrate. The array substrate is located on the light-incident side of the display panel, and the counter substrate is located on the light-emitting side of the display panel. The array substrate includes a first substrate and a color resist layer disposed on the side of the first substrate near the liquid crystal layer. The color resist layer includes a plurality of spaced-apart color resists, and the colors of the color resists include at least red, green, and blue. The counter substrate includes a second substrate and a dimming layer and a black matrix layer sequentially disposed on the side of the second substrate near the liquid crystal layer. The black matrix layer includes a plurality of spaced-apart black matrices, and the black matrices correspond to... The positional arrangement between two adjacent color resists; wherein, the dimming layer includes an auxiliary refractive layer and a refractive functional layer, the refractive functional layer having a lower transmittance for blue light than for red and green light; the auxiliary refractive layer is positioned corresponding to the blue color resist, the refractive functional layer is located on the side of the auxiliary refractive layer away from the second substrate and covers the auxiliary refractive layer and the second substrate, the refractive functional layer includes a first refractive layer and a second refractive layer stacked together, the first refractive layer is located on the side of the second refractive layer closer to the second substrate, and the refractive index of the first refractive layer is greater than the refractive index of the second refractive layer, the refractive index of the auxiliary refractive layer is greater than the refractive index of the first refractive layer. By setting a refractive functional layer on the side of the substrate close to the liquid crystal layer, the viewing angle of the display panel can be increased. Furthermore, by setting an auxiliary refractive layer on the array substrate at the position corresponding to the blue color resist, light passes through the second refractive layer and the first refractive layer and then reaches the auxiliary refractive layer for refraction. This can effectively improve the problems caused by the refractive functional layer having lower transmittance for blue light than for red and green light, inconsistent brightness decay of red, green, and blue light at large viewing angles, and rapid brightness decay of blue light leading to severe color distortion and yellowish tint at large viewing angles, thus improving the display effect of the display panel. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0032] Figure 1 This is a schematic diagram of the structure of the display device provided in this application;

[0033] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the first embodiment of the provided display device;

[0034] Figure 3 yes Figure 2 A partially enlarged schematic diagram of the implementation method in region A of the central area;

[0035] Figure 4 yes Figure 2 A partially enlarged schematic diagram of another embodiment of the central region A;

[0036] Figure 5 yes Figure 2 A partially enlarged schematic diagram of another embodiment of the central region A;

[0037] Figure 6 yes Figure 1 A cross-sectional schematic diagram of the second embodiment of the provided display device;

[0038] Figure 7 yes Figure 2 A schematic diagram of the structure of an embodiment of the array substrate of the provided display device;

[0039] Figure 8 yes Figure 2 A schematic diagram illustrating the fabrication process of the auxiliary refractive layer and the refractive functional layer of the substrate of the provided display device;

[0040] Figure 9 yes Figure 1 A cross-sectional schematic diagram of the third embodiment of the provided display device;

[0041] Figure 10 yes Figure 1 A cross-sectional schematic diagram of the fourth embodiment of the provided display device.

[0042] Icon labels:

[0043] Display device 300; backlight 200; display panel 100; array substrate 1; first substrate 11; driving circuit layer 12; color resist layer 13; color resist 131; first transparent conductive layer 14; thin film transistor 15; gate metal layer 151; gate insulating layer 152; active layer 153; source drain metal layer 154; via 16; first insulating layer 17; passivation layer 18; counter substrate 2; second substrate 21; auxiliary refractive layer 22; refractive functional layer 23; first refractive layer 231; second refractive layer 232; base 233; protrusion 234; black matrix layer 24; black matrix 241; second transparent conductive layer 25; notch 26; liquid crystal layer 3; first polarizer 4; second polarizer 5. Detailed Implementation

[0044] The technical solutions of the embodiments of this application 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 this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0045] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. 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 device 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 devices.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment 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 mutually exclusive, independent, or alternative embodiment. 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] See Figures 1 to 8 , Figure 1 This is a schematic diagram of the structure of the display device provided in this application. Figure 2 yes Figure 1 A cross-sectional schematic diagram of the first embodiment of the provided display device. Figure 3 yes Figure 2 A partially enlarged schematic diagram of the implementation method in region A of the central area. Figure 4 yes Figure 2 A partially enlarged schematic diagram of another embodiment of the central region A. Figure 5 yes Figure 2 A partially enlarged schematic diagram of another embodiment of the central region A. Figure 6 yes Figure 1 A cross-sectional schematic diagram of the second embodiment of the provided display device. Figure 7 yes Figure 2 A schematic diagram of the structure of an embodiment of the array substrate of the provided display device. Figure 8 yes Figure 2 A schematic diagram illustrating the fabrication process of the auxiliary refractive layer and the refractive functional layer of the substrate of the provided display device.

[0048] See Figures 1 to 6 This application provides a display device 300, such as Figure 1As shown, the display device 300 includes a display panel 100 and a backlight 200. The backlight 200 is disposed on one side of the display panel 100 and is used to provide backlight for the display panel 100.

[0049] The display panel 100 includes an array substrate 1 and a counter substrate 2 disposed opposite to each other, and a liquid crystal layer 3 disposed between the array substrate 1 and the counter substrate 2. Specifically, the array substrate 1 and the counter substrate 2 are connected by a sealant (not shown). Specifically, the array substrate 1 is located on the light-incident side of the display panel 100, and the counter substrate 2 is located on the light-emitting side of the display panel 100.

[0050] See Figures 2 to 6 The array substrate 1 includes a first substrate 11, a driving circuit layer 12, and a color resist layer 13. The driving circuit layer 12 and the color resist layer 13 are sequentially disposed on the side of the first substrate 11 near the liquid crystal layer 3. The color resist layer 13 includes a plurality of spaced-apart color resists 131, which filter the light emitted by the backlight 200 to produce different colors. The colors of the color resists 131 include at least red, green, and blue, such as... Figure 1 and Figure 6 As shown, in some embodiments, the color resist 131 only includes red (R), green (G), and blue (B). In other embodiments, the color resist 131 can also be set to other colors. In this application, the color resist layer 13 is directly disposed in the array substrate 1, and the display panel 100 is a COA (Color Filter On Array) display panel 100. In some embodiments, a plurality of pixel units (not shown) are disposed on the surface of the first substrate 11 near the liquid crystal layer 3. The pixel unit includes the aforementioned color resist 131. For example, in one specific embodiment, each pixel unit may include three color resists 131, and the colors of the three color resists 131 are red, green, and blue, respectively.

[0051] The substrate 2 includes a second substrate 21, a dimming layer, and a black matrix layer 24, which are sequentially disposed on the side of the second substrate 21 near the liquid crystal layer 3. The black matrix layer 24 includes a plurality of mutually spaced black matrices 241, which are positioned between adjacent color resists 131.

[0052] like Figure 2 and Figure 6As shown, the dimming layer includes an auxiliary refractive layer 22 and a refractive functional layer 23. The refractive functional layer 23 has a lower transmittance for blue light than for red and green light. The auxiliary refractive layer 22 is disposed corresponding to the blue color resist 131. Specifically, the auxiliary refractive layer 22 is disposed on the surface of the second substrate 21 of the substrate 2 near the liquid crystal layer 3, and corresponds to the blue color resist 131. The refractive functional layer 23 is located on the side of the auxiliary refractive layer 22 away from the second substrate 21 and covers both the auxiliary refractive layer 22 and the second substrate 21. Specifically, the refractive functional layer 23 covers the surface of the auxiliary refractive layer 22 away from the second substrate 21 and the portion of the second substrate 21 near the liquid crystal layer 3 that is not covered by the auxiliary refractive layer 22.

[0053] The refractive functional layer 23 includes a first refractive layer 231 and a second refractive layer 232 stacked together. The first refractive layer 231 is located on the side of the second refractive layer 232 closer to the second substrate 21. Specifically, as shown... Figures 2 to 5 As shown, the second refractive layer 232 covers the surface of the first refractive layer 231 away from the second substrate 21. In this application, the refractive index of the first refractive layer 231 is greater than the refractive index of the second refractive layer 232, and the refractive index of the auxiliary refractive layer 22 is greater than the refractive index of the first refractive layer 231.

[0054] It is understood that by setting a refractive functional layer 23 on the side of the array substrate 2 near the liquid crystal layer 3, and specifically by setting the refractive functional layer 23 to consist of a first refractive layer 231 and a second refractive layer 232 with different refractive indices, and by setting the first refractive layer 231 on the side of the second refractive layer 232 near the second substrate 21, and setting the refractive index of the first refractive layer 231 to be greater than that of the second refractive layer 232, the light emitted by the backlight 200 reaches the array substrate 2 after passing through the array substrate 1 and the liquid crystal layer 3. When passing through the array substrate 2, the light is refracted at the junction of the second refractive layer 232 and the first refractive layer 231, which can effectively increase the light emission angle, increase the viewing angle of the display panel 100, and improve the display brightness of the display panel 100 at the wide viewing angle. At the same time, by setting an auxiliary refractive layer 22 on the array substrate 1 at the position corresponding to the blue color resist 131, and setting the auxiliary refractive layer 22 on the side of the first refractive layer 231 near the second substrate 21, and setting the refractive index of the auxiliary refractive layer 22 to be greater than that of the second refractive layer 232, the light emitted by the backlight 200 reaches the array substrate 2. The refractive index is greater than that of the first refractive layer 231. After passing through the second refractive layer 232 and the first refractive layer 231, the light reaches the auxiliary refractive layer 22. Secondary refraction occurs at the junction of the first refractive layer 231 and the auxiliary refractive layer 22, which can further increase the emission angle of the light and further increase the viewing angle of the display panel 100. Since the transmittance of the refractive functional layer 23 to blue light is less than that to red and green light, by further setting the auxiliary refractive layer 22 at the position corresponding to the blue color resist 131, the transmittance of the auxiliary refractive layer 22 to blue light is better. This can effectively improve the problem of inconsistent brightness attenuation of red, green and blue light at a large viewing angle due to the inconsistent wavelengths of red, green and blue light, and the inconsistent transmittance of red, green and blue light by the first refractive layer 231 and the second refractive layer 232 at a large viewing angle, resulting in serious color distortion and yellowing at a large viewing angle. By increasing the blue light emission rate at a large viewing angle through two refractions, the display effect of the display panel 100 is effectively improved. In other words, by setting a dimming layer, the emission angle of light can be effectively increased, and the problem of color shift at large viewing angles can be solved.

[0055] Specifically, in some embodiments, the first refractive layer 231 is made of SiNx material, where x ≥ 1, and the auxiliary refractive layer 22 is made of composite resin material. In some embodiments, the refractive index of the auxiliary refractive layer 22 is 1.7-1.9, the refractive index of the first refractive layer 231 is 1.5-1.7, and the refractive index of the second refractive layer 232 is 1.3-1.5. The refractive index of the auxiliary refractive layer 22 > the refractive index of the first refractive layer 231 > the refractive index of the second refractive layer 232, thereby ensuring a more effective solution to the problems of severe color shift and yellowish tint at a 100° viewing angle in existing display panels. In one specific embodiment, the first refractive layer 231 is a SiNx material that allows light wavelengths to pass through in the range of 550nm to 680nm, where X≥1. The auxiliary refractive layer 22 is a composite resin material that allows light wavelengths to pass through in the range of 450nm to 550nm. The first refractive layer 231 has high transmittance for red and green light but insufficient transmittance for blue light, while the auxiliary refractive layer 22 has high transmittance for blue light. This can effectively reduce the decay rate of blue light brightness at a wide viewing angle, effectively increase the blue light emission rate at a wide viewing angle, and improve the problem of severe color shift and yellowish tint at a wide viewing angle of 100°.

[0056] In some implementations, see Figure 2 and Figure 6 The second refractive layer 232 covers the surface of the first refractive layer 231 away from the second substrate 21, and the surface of the second refractive layer 232 away from the second substrate 21 is planar. A black matrix layer 24 is disposed on the side of the second refractive layer 232 away from the first refractive layer 231. Specifically, multiple black matrices 241 of the black matrix layer 24 are spaced apart on the surface of the second refractive layer 232 away from the first refractive layer 231. Light emitted from the backlight 200 passes through the color resist 131 and the liquid crystal layer 3 of the array substrate 1 and then enters the second refractive layer 232. In some embodiments, the light emitted from the backlight 200 is perpendicularly incident on the planar surface of the second refractive layer 232 away from the second substrate 21, and the light does not refract at this surface.

[0057] For details, see Figure 2 and Figure 6In some embodiments, the first refractive layer 231 includes a base 233 and a plurality of spaced-apart protrusions 234. The base 233 covers the portion of the second substrate 21 not covered by the auxiliary refractive layer 22, and the protrusions 234 are located on the side of the base 233 and the auxiliary refractive layer 22 away from the second substrate 21. The side surfaces of the protrusions 234 are located between two adjacent black matrices 241, and are actually the interface between the protrusions 234 of the first refractive layer 231 and the second refractive layer 232, i.e., the position where light is refracted when it enters the first refractive layer 231 from the second refractive layer 232. It is understandable that by positioning the side of the protrusion 234 between two adjacent black matrices 241, the black matrices 241 can be positioned to prevent them from blocking the side of the protrusion 234. This prevents the light emitted by the backlight 200 from being blocked by the black matrices 241 and thus from being unable to reach the side of the protrusion 234, thereby preventing refraction. This arrangement ensures that the light can be effectively refracted at the side of the protrusion 234, thereby effectively increasing the light emission angle, improving the light output efficiency at a wide viewing angle, and improving the problem of insufficient brightness at a wide viewing angle.

[0058] Specifically, in some embodiments, the width of the protrusion 234 gradually increases along the direction from the array substrate 1 to the opposing substrate 2. In one specific embodiment, such as... Figure 2 and Figure 6 As shown, the longitudinal section of the protrusion 234 is inverted trapezoidal in shape, and the angle α between the side of the protrusion 234 and the second substrate 21 is 70°-85°. Preferably, the angle α between the side of the protrusion 234 and the second substrate 21 is 80°, which ensures that light can be effectively refracted at the side of the protrusion 234, thereby effectively increasing the emission angle of the light.

[0059] Specifically, in one embodiment, such as Figure 2 As shown, the protrusion 234 of the first refractive layer 231 is disposed corresponding to the color resist 131, and the width of the protrusion 234 is smaller than the distance between two adjacent black matrices 241, that is, the width of the protrusion 234 is smaller than the width of the color resist 131, so that the side of the protrusion 234 is disposed between two adjacent black matrices 241. In this embodiment, by distributing the protrusion 234 corresponding to the color resist 131, that is, distributing it between two adjacent black matrices 241, it is ensured that the side of the protrusion 234 is located between two adjacent black matrices 241, thereby ensuring that the light emitted by the backlight 200 can effectively illuminate the side of the protrusion 234 without being blocked by the black matrices 241, and ensuring the refraction effect of the light at the side of the protrusion 234.

[0060] In another embodiment, such as Figure 6As shown, the protrusion 234 is positioned corresponding to the black matrix 241, and the width of the protrusion 234 is greater than the width of the black matrix 241. That is, the protrusion 234 is positioned between two adjacent color filters 131, and the width of the protrusion 234 is greater than the distance between the two adjacent color filters 131, so that the side of the protrusion 234 is positioned between the two adjacent black matrices 241. In this embodiment, by directly positioning the protrusion 234 corresponding to the black matrix 241 and setting the width of the protrusion 234 to be greater than the width of the black matrix 241, it is ensured that the side of the protrusion 234 is located between the two adjacent black matrices 241, thereby ensuring that the light emitted by the backlight 200 can effectively illuminate the side of the protrusion 234 without being blocked by the black matrix 241, and ensuring the refraction effect of the light at the side position of the protrusion 234.

[0061] Both of the above embodiments can achieve the same technical effect by having the side of the protrusion 234 located between two adjacent black matrices 241, and can be designed as needed.

[0062] In some implementations, such as Figure 2 and Figure 6 As shown, the surface of the base 233 away from the second substrate 21 is flush with the surface of the auxiliary refractive layer 22 away from the second substrate 21. Specifically, both the surface of the base 233 away from the second substrate 21 and the surface of the auxiliary refractive layer 22 away from the second substrate 21 are planar. The width of the auxiliary refractive layer 22 is greater than or equal to the width of the blue color resist 131, ensuring that the blue light passing through the blue color resist 131 can be more fully refracted by the auxiliary refractive layer 22, further improving the blue light transmittance, reducing the attenuation rate of blue light brightness at large viewing angles, increasing the blue light emission rate at large viewing angles, and more effectively improving the problems of severe color shift and yellowish tint at large viewing angles of the display panel 100. In other embodiments, the width of the auxiliary refractive layer 22 can also be smaller than the width of the blue color resist 131, which can be designed as needed.

[0063] In some implementations, such as Figure 3As shown, the longitudinal cross-sectional shape of the auxiliary refractive layer 22 is rectangular, the surface of the auxiliary refractive layer 22 near the second substrate 21 is planar, and the surface of the auxiliary refractive layer 22 away from the second substrate 21 is also planar. The longitudinal cross-sectional shape of the protrusion 234 of the first refractive layer 231 is an inverted trapezoid. When light enters the first refractive layer 231 through the second refractive layer 232, it undergoes a first refraction at the side of the protrusion 234, increasing the exit angle of the light. After entering the second refractive layer 232, the light undergoes a second refraction when it enters the auxiliary refractive layer 22. Specifically, since the auxiliary refractive layer 22 is only set for the blue color filter 131, the blue light undergoes a second refraction at the interface between the second refractive layer 232 and the auxiliary refractive layer 22, which can further increase the exit angle of the blue light. Moreover, the auxiliary refractive layer 22 has a higher transmittance for blue light, allowing the blue light to pass through the auxiliary refractive layer 22 to a greater extent before exiting. This is beneficial for enhancing the light output rate of blue light at a wide viewing angle, increasing the brightness of blue light at a wide viewing angle, and solving the problems of severe color cast and yellow cast at a wide viewing angle.

[0064] Meanwhile, when light passes through the auxiliary refractive layer 22 and is incident on the second substrate 21, that is, when light passes through the auxiliary refractive layer 22 and approaches the surface of the second substrate 21, the refractive index of the auxiliary refractive layer 22 is greater than that of the second substrate 21 because the refractive index of the auxiliary refractive layer 22 is different from that of the second substrate 21. In one specific embodiment, the refractive index of the second substrate 21 is approximately 1.5. When light passes through the auxiliary refractive layer 22 and approaches the surface of the second substrate 21, it is refracted again to further increase the emission angle of the light, increase the viewing angle of the display panel 100, improve the brightness of blue light at a wide viewing angle, and solve the problems of severe color shift and yellowish tint at a wide viewing angle.

[0065] In other implementations, such as Figure 4 As shown, the auxiliary refractive layer 22 is shaped like a convex lens. The surface of the auxiliary refractive layer 22 near the second substrate 21 is arc-shaped and protrudes towards the second substrate 21, while the surface of the auxiliary refractive layer 22 away from the second substrate 21 is planar. In some other embodiments, such as Figure 5As shown, the auxiliary refractive layer 22 is shaped like a triangular pyramid, with a triangular longitudinal cross-section. The surface of the auxiliary refractive layer 22 near the second substrate 21 is a folded surface. It can be understood that after light undergoes secondary refraction when entering the auxiliary refractive layer 22 from the second refractive layer 232, it can be refracted again at the surface of the auxiliary refractive layer 22 near the second substrate 21 when exiting. By setting the auxiliary refractive layer 22 to a convex lens shape or a triangular pyramid shape, and setting the surface of the auxiliary refractive layer 22 near the second substrate 21 to a curved or folded surface, the refraction effect is better than a flat surface. This is more conducive to increasing the light emission angle, further enhancing the light output rate of blue light at a wide viewing angle, and further improving the brightness of blue light at a wide viewing angle. This is more effective in solving the problems of severe color cast and yellow cast at wide viewing angles.

[0066] In some implementations, such as Figure 2 and Figure 6 As shown, the display panel 100 further includes a first polarizer 4, which is disposed on the side of the array substrate 1 away from the counter substrate 2. In some embodiments, the display panel 100 further includes a second polarizer 5, which is disposed on the side of the counter substrate 2 away from the array substrate 1. The first polarizer 4 is used for polarization, and the second polarizer 5 is used for polarization detection.

[0067] In some implementations, such as Figure 2 and Figure 6 As shown, the array substrate 1 further includes a first transparent conductive layer 14, which is disposed on the side of the color resist layer 13 away from the first substrate 11, and is electrically connected to the driving circuit layer 12. Specifically, the first transparent conductive layer 14 can be an ITO (indium tin oxide) transparent conductive layer. The array substrate 2 further includes a second transparent conductive layer 25, which is disposed on the side of the black matrix layer 24 away from the second substrate 21, and covers the black matrix layer 241 and the second refractive layer 232. Specifically, the second transparent conductive layer 25 can also be an ITO (indium tin oxide) transparent conductive layer.

[0068] like Figure 7 As shown, in some embodiments, the driving circuit layer 12 of the array substrate 1 includes a plurality of thin-film transistors 15 spaced apart from each other. A color resist layer 13 is disposed on the side of the driving circuit layer 12 away from the first substrate 11 and covers the thin-film transistors 15. A first transparent conductive layer 14 is disposed on the side of the color resist layer 13 away from the first substrate 11 and is electrically connected to the thin-film transistors 15 through vias 16. The black matrix 241 of the substrate 2 can be provided corresponding to the thin-film transistors 15 of the array substrate 1.

[0069] Specifically, the thin-film transistor 15 includes a gate metal layer 151, a gate insulating layer 152, an active layer 153, and a source-drain metal layer 154 stacked sequentially. The gate insulating layer 152 is disposed on the side of the gate metal layer 151 away from the first substrate 11 and covers both the gate metal layer 151 and the first substrate 11. The active layer 153 is disposed at a position corresponding to the gate metal layer 151 and partially covers the gate insulating layer 152. The source-drain metal layer 154 is disposed on the side of the active layer 153 away from the first substrate 11 and covers a portion of the active layer 153. The source-drain metal layer 154 includes a source (not shown) and a drain (not shown) disposed at a distance, with a portion of the active layer 153 exposed at the interval between the source and drain. The material of the gate metal layer 151 may include Al or Mo.

[0070] A first insulating layer 17 is disposed on the side of the source / drain metal layer 154 away from the first substrate 11. Specifically, the first insulating layer 17 is disposed between the color resist layer 13 and the source / drain metal layer 154, and covers the source / drain metal layer 154, the active layer 153, and the gate insulating layer 152. A passivation layer 18 is disposed between the color resist layer 13 and the first transparent conductive layer 14. The passivation layer 18 is used to prevent ionic substances from entering the liquid crystal layer 3 and affecting the display effect of the display panel 100. A via 16 is disposed in the color resist layer 13 and penetrates the color resist layer 13 and the first insulating layer 17, so that the source / drain metal layer 154 of the thin film transistor 15 is partially exposed. The first transparent conductive layer 14 covers the surface of the passivation layer 18 away from the color resist layer 13 and makes contact with the source / drain metal layer 154 of the thin film transistor 15 through the via 16, forming the same circuit structure as a conventional liquid crystal display. The via 16 can be formed after the formation of the color resist layer 13 and the passivation layer 18 by patterning the passivation layer 18, the color resist layer 13 and the first insulating layer 17.

[0071] See Figure 8In fabricating the auxiliary refractive layer 22 and the refractive functional layer 23 of the substrate 2, a second substrate 21 is first provided. A first refractive material is deposited on one surface of the second substrate 21, covering that surface. Then, the first refractive material is patterned using a mask, removing a portion to form a notch 26, exposing a portion of the surface of the second substrate 21 through the notch 26. The remaining first refractive material forms the base 233 of the first refractive layer 231. Next, an auxiliary refractive material is deposited at the notch 26, covering the portion of the second substrate 21 exposed through the notch 26 to form the auxiliary refractive layer 22. The refractive index of the auxiliary refractive material is greater than that of the first refractive material. In one embodiment, the surface of the auxiliary refractive layer 22 away from the second substrate 21 and the surface of the base 233 away from the second substrate 21 are both planar and flush. Then, a first refractive material is deposited on the base 233 and the surface of the auxiliary refractive layer 22 away from the second substrate 21, and multiple spaced protrusions 234 are formed through coating, exposure, development and other process steps. Finally, a second refractive material is deposited on the side of the protrusions 234 away from the second substrate 21, and the second refractive material covers the protrusions 234, the base 233 and the auxiliary refractive layer 22 to form a second refractive layer 232. The refractive index of the second refractive material is less than that of the first refractive material. In some embodiments, the surface of the second refractive layer 232 away from the second substrate 21 is planar.

[0072] It should be noted that after the auxiliary refractive layer 22 and the refractive functional layer 23 prepared by the above process steps are aligned and assembled with the array substrate 1, the auxiliary refractive layer 22 should be set to correspond to the blue color resist 131 of the array substrate 1, and the side of the protrusion 234 should be set to correspond to the position between two adjacent black matrices 241, so as to ensure the light emission effect, improve the light emission rate of blue light at a wide viewing angle, and improve the problem of severe color deviation and yellowish color deviation of the display panel 100 at a wide viewing angle.

[0073] See Figures 9 to 10 , Figure 9 yes Figure 1 A cross-sectional schematic diagram of the third embodiment of the provided display device. Figure 10 yes Figure 1 A cross-sectional schematic diagram of the fourth embodiment of the provided display device.

[0074] See Figure 9 and Figure 10Unlike the display device 300 in the first and second embodiments, in some other embodiments, the dimming layer of the opposing substrate 2 of the display panel 100 may not include the auxiliary refractive layer 22. That is, the dimming layer may only include the refractive functional layer 23, and the opposing substrate 2 may only include the second substrate 21, the refractive functional layer 23, and the black matrix layer 24. The refractive functional layer 23 and the black matrix layer 24 are sequentially disposed on the side of the second substrate 21 near the liquid crystal layer 3. The black matrix layer 24 includes a plurality of mutually spaced black matrices 241, and the black matrices 241 are disposed at positions corresponding to the positions between two adjacent color resists 131.

[0075] Specifically, in this embodiment, the auxiliary refractive layer 22 of the dimming layer on the substrate 2 can be removed. Instead, a refractive functional layer 23 is provided on the side of the second substrate 21 near the liquid crystal layer 3. The refractive functional layer 23 includes a first refractive layer 231 and a second refractive layer 232 stacked together. The first refractive layer 231 is located on the side of the second refractive layer 232 near the second substrate 21. The refractive index of the first refractive layer 231 is greater than that of the second refractive layer 232. When the light from the backlight 200 is incident on the second refractive layer 232 after passing through the color resist layer 13 and the liquid crystal layer 3, the light will be refracted at the interface between the second refractive layer 232 and the first refractive layer 231 because the refractive indices of the second refractive layer 232 and the first refractive layer 231 are different. This can increase the exit angle of the light, thereby increasing the viewing angle of the display panel 100, improving the light output rate at a wide viewing angle, increasing the brightness of the display panel 100 at a wide viewing angle, and thus improving the display effect of the display panel 100.

[0076] Specifically, in some embodiments, the second refractive layer 232 covers the surface of the first refractive layer 231 away from the second substrate 21 and the portion of the second substrate 21 near the liquid crystal layer 3 that is not covered by the second refractive layer 232. In one specific embodiment, the surface of the second refractive layer 232 near the liquid crystal layer 3 is planar, and a plurality of black matrices 241 are spaced apart on the surface of the second refractive layer 232 near the liquid crystal layer 3.

[0077] Specifically, such as Figure 9 and Figure 10As shown, unlike the display device 300 of the first and second embodiments, in some embodiments, the first refractive layer 231 may only include a plurality of mutually spaced protrusions 234, without including the base 233. The plurality of protrusions 234 can be directly disposed on the surface of the second substrate 21 near the liquid crystal layer 3. The side surfaces of the protrusions 234 are located between two adjacent black matrices 241, and the side surfaces of the protrusions 234 are the interface between the protrusions 234 of the first refractive layer 231 and the second refractive layer 232, that is, the position where light is refracted when it enters the first refractive layer 231 from the second refractive layer 232. The specific structure and arrangement of the protrusions 234 are the same as those of the protrusions 234 of the first refractive layer 231 in the first and second embodiments, and can achieve the same or similar technical effects.

[0078] In other embodiments, the structure of the first refractive layer 231 may be the same as that of the first refractive layer 231 of the display device 300 in the first and second embodiments, and may include a base 233 and a plurality of mutually spaced protrusions 234, which can be designed as needed.

[0079] Specifically, along the direction from the array substrate 1 to the opposing substrate 2, the width of the protrusion 234 gradually increases. In one specific embodiment, such as... Figure 9 and Figure 10 As shown, the longitudinal section of the protrusion 234 is inverted trapezoidal in shape, and the angle α between the side of the protrusion 234 and the second substrate 21 is 70°-85°. Preferably, the angle α between the side of the protrusion 234 and the second substrate 21 is 80°, which ensures that light can be effectively refracted at the side of the protrusion 234, thereby effectively increasing the emission angle of the light.

[0080] Specifically, in one embodiment, such as Figure 9 As shown, the protrusion 234 of the first refractive layer 231 is disposed corresponding to the color resist 131, and the width of the protrusion 234 is smaller than the distance between two adjacent black matrices 241, that is, the width of the protrusion 234 is smaller than the width of the color resist 131, so that the side of the protrusion 234 is disposed between two adjacent black matrices 241. In another embodiment, as Figure 10As shown, the protrusion 234 is positioned corresponding to the black matrix 241, and the width of the protrusion 234 is greater than the width of the black matrix 241. That is, the protrusion 234 is positioned between two adjacent color filters 131, and the width of the protrusion 234 is greater than the distance between the two adjacent color filters 131, so that the side of the protrusion 234 is positioned between the two adjacent black matrices 241. This arrangement ensures that the side of the protrusion 234 is located between the two adjacent black matrices 241, thereby ensuring that the light emitted by the backlight 200 can effectively illuminate the side of the protrusion 234 without being blocked by the black matrix 241, ensuring the refraction effect of light at the side position of the protrusion 234, and thus improving the light output efficiency over a wide viewing angle.

[0081] In this embodiment, the remaining structure of the display device 300 is the same as that of the first embodiment and the second embodiment, and can achieve the same or similar technical effects, so it will not be described again here.

[0082] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A display panel, comprising an array substrate and a counter substrate disposed opposite to each other, and a liquid crystal layer disposed between the array substrate and the counter substrate, wherein the array substrate is located on the light-incident side of the display panel, and the counter substrate is located on the light-emitting side of the display panel, characterized in that, The array substrate includes a first substrate and a color resist layer disposed on the first substrate near the liquid crystal layer; the color resist layer includes a plurality of spaced-apart color resists, and the colors of the color resists include at least red, green and blue; The substrate includes a second substrate and a dimming layer and a black matrix layer sequentially disposed on the side of the second substrate near the liquid crystal layer; the black matrix layer includes a plurality of black matrices spaced apart from each other, and the black matrices are disposed at positions corresponding to the positions between two adjacent color resists; The dimming layer includes an auxiliary refractive layer and a refractive functional layer. The refractive functional layer has a lower transmittance for blue light than for red and green light. The auxiliary refractive layer corresponds to a blue color filter and is located on the side of the auxiliary refractive layer away from the second substrate, covering both the auxiliary refractive layer and the second substrate. The refractive functional layer includes a first refractive layer and a second refractive layer stacked together. The first refractive layer is located on the side of the second refractive layer closer to the second substrate, and the refractive index of the first refractive layer is greater than that of the second refractive layer. The refractive index of the auxiliary refractive layer is greater than that of the first refractive layer. The first refractive layer includes a plurality of spaced-apart protrusions, the sides of which are located between two adjacent black matrices; the width of the protrusions gradually increases along the direction from the array substrate to the opposing substrate.

2. The display panel according to claim 1, characterized in that, The first refractive layer further includes a base; the base covers the portion of the second substrate not covered by the auxiliary refractive layer, and the protrusion is located on the side of the base and the auxiliary refractive layer away from the second substrate.

3. The display panel according to claim 2, characterized in that, The longitudinal section of the protrusion is in the shape of an inverted trapezoid, and the angle between the side of the protrusion and the second substrate is 70°-85°.

4. The display panel according to claim 3, characterized in that, The protrusion corresponds to the color resist setting, and the width of the protrusion is less than the distance between two adjacent black matrices; Alternatively, the protrusion may be positioned corresponding to the black matrix, and the width of the protrusion may be greater than the width of the black matrix.

5. The display panel according to claim 2, characterized in that, The surface of the base away from the second substrate is flush with the surface of the auxiliary refractive layer away from the second substrate; the width of the auxiliary refractive layer is greater than or equal to the width of the blue color resist.

6. The display panel according to claim 1, characterized in that, The auxiliary refractive layer has a rectangular longitudinal cross-sectional shape, and the surface of the auxiliary refractive layer near the second substrate is planar. Alternatively, the auxiliary refractive layer may be shaped like a convex lens, with the surface of the auxiliary refractive layer near the second substrate being arc-shaped and protruding towards the second substrate; Alternatively, the auxiliary refractive layer may be in the shape of a triangular pyramid, with a triangular longitudinal section and a folded surface near the second substrate.

7. The display panel according to claim 1, characterized in that, The display panel further includes a driving circuit layer, which includes a plurality of thin-film transistors spaced apart from each other, and the black matrix is ​​arranged corresponding to the thin-film transistors; The array substrate further includes a first transparent conductive layer, which is disposed on the side of the color resist layer away from the first substrate and is electrically connected to the thin film transistor through a via; the array substrate further includes a second transparent conductive layer, which is disposed on the side of the black matrix layer away from the second substrate and covers the black matrix and the second refractive layer. The display panel further includes a first polarizer disposed on the side of the array substrate away from the counter substrate; and / or, the display panel further includes a second polarizer disposed on the side of the counter substrate away from the array substrate.

8. The display panel according to claim 1, characterized in that, The refractive index of the auxiliary refractive layer is 1.7-1.9; and / or, The refractive index of the first refractive layer is 1.5-1.7; and / or, The refractive index of the second refractive layer is 1.3-1.

5.

9. The display panel according to claim 1, characterized in that, The first refractive layer is made of SiNx material, where X ≥ 1; and / or, The auxiliary refractive layer is made of a composite resin material.

10. A display device, characterized in that, include: The display panel as described in any one of claims 1-9; A backlight source is disposed on the side of the array substrate away from the opposing substrate, and is used to provide backlight for the display panel.

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