Display panel

Abstract

The utility model relates to a display panel which comprises an array substrate, a transparent electrode layer, a first refraction layer and a first alignment film, and the transparent electrode layer, the first refraction layer and the first alignment film are sequentially arranged on the array substrate. The refractive index of the first refraction layer is smaller than that of the first transparent electrode layer and larger than that of the first alignment film, so that the refractive index gradient of the first transparent electrode layer, the refractive index gradient of the first refraction layer and the refractive index gradient of the first alignment film are reduced, and the light-emitting side interface reflectivity of each film layer between the first transparent electrode layer and the first alignment film is reduced; therefore, the light transmittance of the display panel is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel. BACKGROUND

[0002] The light transmission area of a liquid crystal display (LCD) is composed of multiple film layers, and the refractive index difference between some of the film layers is large, for example, the refractive index of an indium tin oxide (ITO) layer is usually about 2.0, while the refractive index of a glass substrate and an alignment film is usually about 1.5, which results in a large refractive index difference between the adjacent ITO layer and the alignment film, and between the adjacent ITO layer and the glass substrate, and thus a large reflectivity at the interface, and further a large light transmittance loss of the display panel. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a display panel, which can effectively improve the light transmittance of the display panel.

[0004] The present application provides a display panel, which comprises:

[0005] an array substrate;

[0006] a first transparent electrode layer disposed above the array substrate;

[0007] a first refractive layer disposed on a side of the first transparent electrode layer away from the array substrate,

[0008] a first alignment film disposed on a side of the first refractive layer away from the first transparent electrode layer;

[0009] wherein the refractive index of the first refractive layer is less than the refractive index of the first transparent electrode layer and greater than the refractive index of the first alignment film.

[0010] In some embodiments, the first refractive layer comprises N layers of sub-refractive layers, 1≤N≤3.

[0011] wherein when N>1, the refractive index of the N layers of sub-refractive layers decreases in the direction from the first transparent electrode layer to the first alignment film.

[0012] In some embodiments, the first refractive layer comprises a first sub-refractive layer, wherein the refractive index of the first sub-refractive layer ranges from 1.7 to 1.8.

[0013] In some embodiments, the first refractive layer comprises a first sub-refractive layer and a second sub-refractive layer, the second sub-refractive layer is located between the first sub-refractive layer and the first alignment film, wherein the refractive index of the first sub-refractive layer ranges from 1.8 to 1.9, and the refractive index of the second sub-refractive layer ranges from 1.6 to 1.7.

[0014] In some embodiments, a side of the first sub-refractive layer facing the second sub-refractive layer is provided with a first microstructure.

[0015] In some embodiments, the array substrate comprises:

[0016] a first substrate;

[0017] a second refractive layer disposed above the first substrate; and

[0018] a second transparent electrode layer disposed on a side of the second refractive layer away from the first substrate.

[0019] wherein the refractive index of the second refractive layer is less than the refractive index of the second transparent electrode layer and greater than the refractive index of the first substrate.

[0020] In some embodiments, the second refractive layer comprises M sub-refractive layers, 1≤M≤3.

[0021] wherein when M>1, the refractive index of the M sub-refractive layers decreases in a direction from the second transparent electrode layer to the first substrate.

[0022] In some embodiments, the second refractive layer comprises a third sub-refractive layer, wherein the refractive index of the third sub-refractive layer ranges from 1.7 to 1.8.

[0023] In some embodiments, the second refractive layer comprises a third sub-refractive layer and a fourth sub-refractive layer, the fourth sub-refractive layer is located between the third sub-refractive layer and the first substrate, wherein the refractive index of the third sub-refractive layer ranges from 1.8 to 1.9, and the refractive index of the fourth sub-refractive layer ranges from 1.6 to 1.7.

[0024] In some embodiments, a side of the third sub-refractive layer facing the fourth sub-refractive layer is provided with a second microstructure.

[0025] The application provides a display panel, and the application adds a first refractive layer between the first transparent electrode layer and the first alignment film, wherein the refractive index of the first refractive layer is smaller than the refractive index of the first transparent electrode layer and larger than the refractive index of the first alignment film, so that the refractive index gradient of the first transparent electrode layer, the refractive index of the first refractive layer and the refractive index of the first alignment film is reduced, the light transmission rate of the display panel is effectively improved, and the problem that the light transmission rate of the display panel is greatly lost due to the large interface reflection caused by the large difference between the refractive indexes of the first transparent electrode layer and the first alignment film is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0027] In order to more completely understand the application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0028] Figure 1 is a cross-sectional view of a display panel provided by the prior art;

[0029] Figure 2 is a cross-sectional view of a display panel provided by an embodiment of the application;

[0030] Figure 3 is a partial cross-sectional view of one of the display panels provided by an embodiment of the application;

[0031] Figure 4 is a partial cross-sectional view of one of the display panels provided by an embodiment of the application;

[0032] Figure 5 is a partial cross-sectional view of one of the display panels provided by an embodiment of the application.

[0033] Explanation of reference numerals:

[0034] 100, display panel; 110, array substrate; 111, first substrate; 112, second transparent electrode layer; 113, gate insulating layer; 114, passivation layer; 120, first transparent electrode layer; 130, first alignment film; 140, liquid crystal layer; 150, second alignment film; 160, color film substrate; 161, second substrate; 162, color resistance layer; 163, planarization layer; 170, first polarizer; 180, second polarizer; 210, first refractive layer; 211, first sub-refractive layer; 212, second sub-refractive layer; 213, first microstructure; 220, second refractive layer; 221, third sub-refractive layer; 222, fourth sub-refractive layer; 223, second microstructure. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor are within the protection scope of the present application.

[0036] Please refer to Figure 1 , Figure 1 is a sectional view of a display panel in the prior art, which comprises an array substrate 110, a first transparent electrode layer 120, a first alignment film 130, a liquid crystal layer 140, a second alignment film 150 and a color film substrate 160, wherein the array substrate 110 and the color film substrate 160 are oppositely arranged, the liquid crystal layer 140 is located between the array substrate 110 and the color film substrate 160, the first transparent electrode layer 120 is arranged on the side of the array substrate 110 close to the liquid crystal layer 140, and the first alignment film 130 is arranged between the first transparent electrode layer 120 and the liquid crystal layer 140; the second alignment film 150 is arranged between the color film substrate 160 and the liquid crystal layer 140.

[0037] In the structure of the display panel, the first transparent electrode layer 120 is adjacent to the first alignment film 130, the material of the first transparent electrode layer 120 is ITO, the refractive index of which is about 2.0, the material of the first alignment film 130 is usually an organic polymer, such as polyimide, etc., the refractive index of the first alignment film 130 is about 1.5, and the refractive index difference between the first transparent electrode layer 120 and the first alignment film 130 is large. When light enters from one medium into another medium, according to the Fresnel law, reflection and refraction will inevitably occur at the interface between the two media, and the greater the refractive index difference, the greater the intensity of reflected light, and the greater the intensity of reflected light, the greater the light transmittance loss of the film layer. At present, in the structure of the display panel, the interface reflectivity between the first transparent electrode layer 120 and the first alignment film 130 is generally greater than or equal to 2%, and the light transmittance loss of the array substrate side of the display panel is greater than or equal to 4% due to the refractive index difference between the first transparent electrode layer 120 and the first alignment film 130.

[0038] To solve the above problems, the present application provides a display panel 100, please refer to Figure 2 The display panel 100 of the present application comprises an array substrate 110, a first transparent electrode layer 120, a first refractive layer 210 and a first alignment film 130. The first transparent electrode layer 120 is arranged above the array substrate 110 and located at the light emitting side; the first refractive layer 210 is arranged on the side of the first transparent electrode layer 120 away from the array substrate 110, and the first alignment film 130 is arranged on the side of the first refractive layer 210 away from the first transparent electrode layer 120; wherein the refractive index of the first refractive layer 210 is less than the refractive index of the first transparent electrode layer 120 and greater than the refractive index of the first alignment film 130.

[0039] Further, the material of the first transparent electrode layer 120 is ITO, the refractive index of the first transparent electrode layer 120 is about 2.0 (such as between 1.9 and 2.1), the material of the first alignment film 130 is an organic polymer, such as polyimide, etc., and the refractive index of the first alignment film 130 is about 1.5 (such as between 1.4 and 1.6).

[0040] The present application adds the first refractive layer 210 between the first transparent electrode layer 120 and the first alignment film 130. Since the refractive index of the first refractive layer 210 is between the refractive index of the first transparent electrode layer 120 and the refractive index of the first alignment film 130, the refractive index of the first transparent electrode layer 120, the refractive index of the first refractive layer 210 and the refractive index of the first alignment film 130 show a gradient decreasing trend. The refractive index between the first transparent electrode layer 120 and the first alignment film 130 is avoided to be suddenly changed, thereby reducing the interface reflectivity of each film layer between the first transparent electrode layer 120 and the first alignment film 130. Therefore, the light transmittance of the first transparent electrode layer 120 and the first alignment film 130 as a whole can be effectively improved, and the light extraction efficiency of the display panel 100 is further improved.

[0041] In the present application, please refer to Figures 2-5 The first refractive layer 210 can include one or more film layers. When the first refractive layer 210 includes multiple film layers, the refractive index of the first refractive layer 210 decreases in the direction from the first transparent electrode layer 120 to the first alignment film 130, so that the refractive index of the film layer gradually decreases in the direction from the first transparent electrode layer 120 to the first alignment film 130. The interface reflectivity between the film layers is avoided to be too large due to the sudden change of the refractive index, and the light transmittance loss is further increased.

[0042] The anti-reflection optical film used in the prior art is usually composed of multiple layers of anti-reflection film with high and low refractive index arranged at intervals. The refractive index and thickness of the optical film are adjusted to make the phase difference of the two beams of light at the interface be an odd multiple of π, and the interface reflectivity between the film layers is reduced by using the interference cancellation principle of light. However, this method has poor practicability in actual operation because the design of multiple layers of anti-reflection optical film with high and low refractive index arranged at intervals includes complex optical engineering, which needs to consider multiple factors, including the refractive index of the material, the thickness of the film, the wavelength of the light, etc. Then, the best film structure and parameters are found by simulation calculation, which has great design difficulty and needs to be repeatedly verified to improve the design accuracy, so the actual utilization value is low. In addition, in order to achieve wide-band anti-reflection effect, the optical film composed of multiple layers of anti-reflection film with high and low refractive index arranged at intervals usually needs to design more film layers (usually including more than three film layers) to meet the optical requirements, which has a great impact on production cost and capacity. In addition, due to the large number of film layers, the accumulation and amplification of errors and defects will affect the yield and overall anti-reflection effect of the product.

[0043] In some embodiments, please refer to Figures 3-5The first refractive layer 210 of the present application comprises N layers of sub-refractive layers, 1≤N≤3, for example, N is equal to 1, 2 or 3, that is, the first refractive layer 210 can comprise 1 to 3 layers of sub-refractive layers; wherein when N>1, that is, the first refractive layer 210 comprises multiple layers (N is equal to 2 or 3) of sub-refractive layers, the refractive index of the N layers of sub-refractive layers decreases in the direction from the first transparent electrode layer 120 to the first alignment film 130. The present application sets 1 to 3 layers of sub-refractive layers between the first transparent electrode layer 120 and the first alignment film 130. Since the first refractive layer 210 comprises a small number of layers of films, its optical design is relatively simple, and it does not need complex optical design and simulation calculation. Therefore, the first refractive layer 210 of the present application has the advantages of simple structure, simple manufacturing process, strong practicability, easy implementation in industry, and low cost. At the same time, since the number of layers of films is small, the actual errors and defects are relatively small, which can improve the yield and the overall anti-reflection effect of the product.

[0044] In some embodiments, please refer to Figure 3 The first refractive layer 210 can only comprise one layer of sub-refractive layer. For example, the first refractive layer 210 comprises a first sub-refractive layer 211, wherein the refractive index of the first sub-refractive layer 211 ranges from 1.7 to 1.8, such as 1.70, 1.72, 1.74, 1.76, 1.78, 1.80, etc. The refractive index of the first sub-refractive layer 211 is between the refractive index of the first transparent electrode layer 120 and the refractive index of the first alignment film 130, and the refractive index decreases in a gradient manner from the first transparent electrode layer 120 to the first sub-refractive layer 211 and then to the first alignment film 130. This can reduce the light-outside interface reflectivity of each film layer between the first transparent electrode layer 120 and the first alignment film 130, thereby improving the overall light transmittance of the display panel 100.

[0045] In some embodiments, please refer to Figure 4, the first refractive layer 210 can include two or three sub-refractive layers. For example, when the first refractive layer 210 includes two sub-refractive layers, the first refractive layer 210 can include a first sub-refractive layer 211 and a second sub-refractive layer 212, and the second sub-refractive layer 212 is located between the first sub-refractive layer 211 and the first alignment film 130. The refractive index of the first sub-refractive layer 211 ranges from 1.8 to 1.9, such as 1.80, 1.82, 1.84, 1.86, 1.88, 1.90, etc. The refractive index of the second sub-refractive layer 212 ranges from 1.6 to 1.7, such as 1.60, 1.62, 1.64, 1.66, 1.68, 1.70, etc. In this embodiment, the refractive index of the first transparent electrode layer 120 to the first sub-refractive layer 211, then to the second sub-refractive layer 212, and then to the first alignment film 130 decreases in a gradient manner. This can further reduce the light-outside-interface reflectivity of each film layer between the first transparent electrode layer 120 and the first sub-refractive layer 211, between the first sub-refractive layer 211 and the second sub-refractive layer 212, and between the second sub-refractive layer 212 and the first alignment film 130, thereby further improving the overall light transmittance of the display panel 100.

[0046] In this application, the first refractive layer 210 can also include three sub-refractive layers. When the first refractive layer 210 includes three sub-refractive layers, the principle is the same as when the first refractive layer 210 includes two sub-refractive layers, which will not be repeated here.

[0047] In some embodiments, referring to Figure 4 , the first sub-refractive layer 211 is provided with a first microstructure 213 on the side facing the second sub-refractive layer 212. The first microstructure 213 can achieve light diffusion or convergence. For example, when light is emitted from a less dense medium to a denser medium, the light is divergent, which can increase the side-view angle brightness of the display panel 100. When light is emitted from a denser medium to a less dense medium, the light is convergent, which can increase the front-view angle brightness of the display panel 100.

[0048] The first microstructure 213 can be an array of protruding structures, and the cross section of the first microstructure 213 can be semicircular, triangular, rectangular, etc., but is not limited thereto. Specifically, by setting different microstructure shapes and sizes, the view angle expansion effect of different display panels 100 can be controlled.

[0049] Please continue to refer to Figure 1In the prior art display panel structure, the array substrate 110 includes a first substrate 111 and a second transparent electrode layer 112. The second transparent electrode layer 112 is arranged adjacent to the first substrate 111. The material of the second transparent electrode layer 112 is ITO, and the refractive index thereof is about 2.0. The material of the first substrate 111 is glass, and the refractive index thereof is about 1.5. The refractive index difference between the second transparent electrode layer 112 and the first substrate 111 is large. Therefore, the interface reflectivity between the second transparent electrode layer 112 and the first substrate 111 is large, and the light transmittance loss is large.

[0050] In the present application, please refer to Figure 2 The array substrate 110 of the present application includes a first substrate 111, a second refractive layer 220 and a second transparent electrode layer 112. The second refractive layer 220 is arranged above the first substrate 111. The second transparent electrode layer 112 is arranged on the side of the second refractive layer 220 away from the first substrate 111. The refractive index of the second refractive layer 220 is less than that of the second transparent electrode layer 112 and greater than that of the first substrate 111. The material of the second transparent electrode layer 112 is ITO, and the refractive index thereof is about 2.0 (e.g. between 1.9 and 2.1). The material of the first substrate 111 is glass, and the refractive index thereof is about 1.5 (e.g. between 1.4 and 1.6).

[0051] In the present application, the second refractive layer 220 is arranged between the second transparent electrode layer 112 and the first substrate 111. The refractive index of the second refractive layer 220 is between the refractive index of the second transparent electrode layer 112 and the refractive index of the first substrate 111. The refractive index of the second transparent electrode layer 112, the refractive index of the second refractive layer 220 and the refractive index of the first substrate 111 decrease in a gradient manner. The refractive index difference between the second transparent electrode layer 112 and the first substrate 111 is avoided, and the interface reflectivity of each film layer between the second transparent electrode layer 112 and the first substrate 111 is reduced. Therefore, the light transmittance of the second transparent electrode layer 112 and the first substrate 111 as a whole is effectively improved, and the overall light transmittance of the display panel 100 is further improved.

[0052] In some embodiments, please refer to Figures 3-5, the second refractive layer 220 includes M layers of sub-refractive layers, 1≤M≤3, for example, M is equal to 1, 2 or 3, that is, the second refractive layer 220 can include 1 to 3 layers of sub-refractive layers; wherein, when M>1, that is, the second refractive layer 220 includes multiple layers (M is equal to 2 or 3) of sub-refractive layers, the refractive index of the M layers of sub-refractive layers decreases in the direction from the second transparent electrode layer 112 to the first substrate 111. The present application sets 1 to 3 layers of sub-refractive layers between the second transparent electrode layer 112 and the first substrate 111. Since the second refractive layer 220 includes a small number of film layers, its optical design is relatively simple, and it does not need complex optical design and simulation calculation. Therefore, the second refractive layer 220 has the advantages of simple structure, simple manufacturing process, strong practicability, easy implementation in industry, and low cost. At the same time, since the number of film layers is small, the actual errors and defects are relatively small, which can improve the yield and overall anti-reflection effect of the product.

[0053] In some embodiments, please refer to Figures 3-4 , the second refractive layer 220 can include only one layer of sub-refractive layer. For example, the second refractive layer 220 includes a third sub-refractive layer 221, wherein the refractive index of the third sub-refractive layer 221 ranges from 1.7 to 1.8, such as 1.70, 1.72, 1.74, 1.76, 1.78, 1.80, etc.

[0054] In some embodiments, please refer to Figure 5 , the second refractive layer 220 can include two or three layers of sub-refractive layers. For example, when the second refractive layer 220 includes two layers of sub-refractive layers, the second refractive layer 220 can include a third sub-refractive layer 221 and a fourth sub-refractive layer 222, and the fourth sub-refractive layer 222 is located between the third sub-refractive layer 221 and the first substrate 111, wherein the refractive index of the third sub-refractive layer 221 ranges from 1.8 to 1.9, such as 1.80, 1.82, 1.84, 1.86, 1.88, 1.90, etc., and the refractive index of the fourth sub-refractive layer 222 ranges from 1.6 to 1.7, such as 1.60, 1.62, 1.64, 1.66, 1.68, 1.70, etc.

[0055] In the present application, the structure and principle of the second refractive layer 220 are similar to those of the first refractive layer 210 described above, which will not be repeated here.

[0056] In some embodiments, please refer to Figure 5 , the third sub-refractive layer 221 is provided with a second microstructure 223 on the side facing the fourth sub-refractive layer 222. The structure and principle of the second microstructure 223 are the same as those of the first microstructure 213 described above, which will not be repeated here.

[0057] In the present application, the display panel 100 can include the first microstructure 213 or the second microstructure 223, or the display panel 100 can include both the first microstructure 213 and the second microstructure 223, wherein the first microstructure 213 can be used to improve the front viewing angle brightness, and the second microstructure 223 can be used to improve the side viewing angle brightness, but is not limited thereto. Specifically, the first microstructure 213 and the second microstructure 223 can be arranged according to the actual performance requirements of the display panel 100.

[0058] In the display panel 100 structure of the present application, the number of sub-refraction layers included in the first refraction layer 210 and the number of sub-refraction layers included in the second refraction layer 220 can also be matched according to the actual performance requirements of the display panel 100.

[0059] In an embodiment, referring to Figure 3 , the display panel 100 includes both the first refraction layer 210 and the second refraction layer 220, i.e., one refraction layer is arranged between the first transparent electrode layer 120 and the first alignment film 130, and one refraction layer is arranged between the second transparent electrode layer 112 and the first substrate 111. Among them, the first refraction layer 210 can include a first sub-refraction layer 211, the refractive index of the first sub-refraction layer 211 ranges from 1.7 to 1.8, and the second refraction layer 220 can include a third sub-refraction layer 221, the refractive index of the third sub-refraction layer 221 ranges from 1.7 to 1.8. This embodiment can reduce the light-out side interface reflectivity of the second transparent electrode layer 112 to 1%, reduce the light-out side interface reflectivity of the first alignment film 130 to 1%, and improve the overall transmittance of the display panel 100 by 2%, which can effectively improve the light-out efficiency of the display panel 100.

[0060] In an embodiment, referring to Figure 4 , the display panel 100 includes both the first refraction layer 210 and the second refraction layer 220. Among them, the first refraction layer 210 can include a first sub-refraction layer 211 and a second sub-refraction layer 212, the second sub-refraction layer 212 is located between the first sub-refraction layer 211 and the first alignment film 130, the refractive index of the first sub-refraction layer 211 ranges from 1.8 to 1.9, and the refractive index of the second sub-refraction layer 212 ranges from 1.6 to 1.7; the second refraction layer 220 can include a third sub-refraction layer 221, and the refractive index of the third sub-refraction layer 221 ranges from 1.7 to 1.8. This embodiment can reduce the light-out side interface reflectivity of the second transparent electrode layer 112 to 1% or less, reduce the light-out side interface reflectivity of the first alignment film 130 to 1% or less, improve the overall transmittance of the display panel 100 by 2% or more, and further improve the light-out efficiency of the display panel 100.

[0061] Further, in the embodiment, the first refractive layer 210 is provided with the first microstructure 213 protruding towards the second refractive layer 212. Since the light rays converge when the light rays are emitted from the optically dense medium to the optically sparse medium, the front viewing angle luminance of the display panel 100 is increased.

[0062] In an embodiment, referring to Figure 5 , the display panel 100 comprises the first refractive layer 210 and the second refractive layer 220. The first refractive layer 210 comprises the first sub-refractive layer 211, the refractive index of the first sub-refractive layer 211 ranges from 1.7 to 1.8. The second refractive layer 220 comprises the third sub-refractive layer 221 and the fourth sub-refractive layer 222, the fourth sub-refractive layer 222 is located between the third sub-refractive layer 221 and the first substrate 111. The refractive index of the third sub-refractive layer 221 ranges from 1.8 to 1.9, and the refractive index of the fourth sub-refractive layer 222 ranges from 1.6 to 1.7. In the embodiment, the interface reflectivity of the light emitting side of the second transparent electrode layer 112 is reduced to below 1%, the interface reflectivity of the light emitting side of the first alignment film is reduced to below 1%, the overall transmittance of the display panel 100 is increased by more than 2%, and the light emitting efficiency of the display panel 100 is further improved.

[0063] Further, in the embodiment, the third sub-refractive layer 221 is provided with the second microstructure 223 protruding towards the fourth sub-refractive layer 222. Since the light rays diverge when the light rays are emitted from the optically sparse medium to the optically dense medium, the side viewing angle luminance of the display panel 100 is increased.

[0064] The display panel 100 structure of the present application adds the first refractive layer 210 between the first transparent electrode layer 120 and the first alignment film 130, and adds the second refractive layer 220 between the second transparent electrode layer 112 and the first substrate 111. The light transmittance of the display panel 100 is increased by more than 2%, the side viewing angle or front viewing angle luminance is improved by setting the first microstructure 213 and the second microstructure 223, and the performance of the display panel 100 is effectively improved.

[0065] In the present application, referring to Figure 2 , the array substrate 110 further comprises a gate insulating layer 113 and a passivation layer 114. The gate insulating layer 113 is located on the side of the second transparent electrode layer 112 close to the first transparent electrode layer 120, and the passivation layer 114 is located between the gate insulating layer 113 and the first transparent electrode layer 120. The material of the gate insulating layer 113 and the passivation layer 114 can be SiNx, but is not limited thereto. The refractive index of the gate insulating layer 113 and the refractive index of the passivation layer 114 are both around 2.0, which is close to the refractive index of the first transparent electrode layer 120 and the refractive index of the second transparent electrode layer 112.

[0066] The array substrate 110 further comprises a thin film transistor including a gate electrode, an active layer and a source electrode and a drain electrode, the gate electrode and the active layer are disposed on the first substrate 111 and located on opposite sides of the gate insulating layer 113, and the source electrode and the drain electrode are located between the active layer and the passivation layer 114 and electrically connected with the active layer, wherein the thin film transistor can be but is not limited to a bottom-gate structure or a top-gate structure. Specifically, the specific structure of the thin film transistor can refer to the prior art, and the present application does not make specific limitations.

[0067] In the present application, please refer to Figure 2 The display panel 100 further comprises a liquid crystal layer 140, a color filter substrate 160, a second alignment film 150, a first polarizer 170 and a second polarizer 180. The color filter substrate 160 is disposed opposite to the array substrate 110; the liquid crystal layer 140 is located between the array substrate 110 and the color filter substrate 160; the second alignment film 150 is located on the side of the color filter substrate 160 close to the liquid crystal layer 140; the first polarizer 170 is located on the side of the array substrate 110 away from the liquid crystal layer 140; and the second polarizer 180 is located on the side of the color filter substrate 160 away from the liquid crystal layer 140. The color filter substrate 160 comprises a planarization layer 163, a color resistance layer 162 and a second substrate 161, the planarization layer 163 is located on the side of the second alignment film 150 away from the liquid crystal layer 140, the color resistance layer 162 is located on the side of the planarization layer 163 away from the second alignment film 150, and the second substrate 161 is located between the color resistance layer 162 and the second polarizer 180. The refractive indexes of the film layers on the side of the color filter substrate 160 are similar, so the anti-reflection structure can not be provided.

[0068] In summary, the present application provides a display panel, and the first refractive layer is additionally provided between the first transparent electrode layer and the first alignment film, wherein the refractive index of the first refractive layer is smaller than the refractive index of the first transparent electrode layer and larger than the refractive index of the first alignment film, so that the refractive index gradient of the first transparent electrode layer, the first refractive layer and the first alignment film is reduced, the interface reflectivity of the film layers on the light-emitting side between the first transparent electrode layer and the first alignment film is reduced, the light transmittance of the display panel can be effectively improved, and the problem that the light transmittance of the display panel is greatly lost due to the large interface reflectivity caused by the large difference in refractive index between the first transparent electrode layer and the first alignment film adjacent to each other is avoided.

[0069] In the description of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0070] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0071] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0072] The above are only the preferred embodiments of the present application, and do not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution content of the present application and in accordance with the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. A display panel, characterized by, The array substrate comprises: an array substrate; a first transparent electrode layer disposed above the array substrate; a first refractive layer disposed on a side of the first transparent electrode layer away from the array substrate; a first alignment film disposed on a side of the first refractive layer away from the first transparent electrode layer; wherein the refractive index of the first refractive layer is less than the refractive index of the first transparent electrode layer and greater than the refractive index of the first alignment film.

2. The display panel of claim 1, wherein, The first refractive layer comprises N layers of sub-refractive layers, 1≤N≤3; wherein when N>1, the refractive index of the N layers of sub-refractive layers decreases in the direction from the first transparent electrode layer to the first alignment film.

3. The display panel of claim 2, wherein, The first refractive layer comprises a first sub-refractive layer, wherein the refractive index of the first sub-refractive layer ranges from 1.7 to 1.

8.

4. The display panel of claim 2, wherein, The first refractive layer comprises a first sub-refractive layer and a second sub-refractive layer, the second sub-refractive layer being located between the first sub-refractive layer and the first alignment film, wherein the refractive index of the first sub-refractive layer ranges from 1.8 to 1.9, and the refractive index of the second sub-refractive layer ranges from 1.6 to 1.

7.

5. The display panel of claim 4, wherein, A first microstructure is disposed on a side of the first sub-refractive layer facing the second sub-refractive layer.

6. The display panel of any one of claims 1 to 5, wherein, The array substrate comprises: a first substrate; a second refractive layer disposed above the first substrate; and a second transparent electrode layer disposed on a side of the second refractive layer away from the first substrate; wherein the refractive index of the second refractive layer is less than the refractive index of the second transparent electrode layer and greater than the refractive index of the first substrate.

7. The display panel of claim 6, wherein, The second refractive layer comprises M layers of sub-refractive layers, 1≤M≤3; wherein when M>1, the refractive index of the M layers of sub-refractive layers decreases in the direction from the second transparent electrode layer to the first substrate.

8. The display panel of claim 7, wherein, The second refractive layer comprises a third sub-refractive layer, wherein the refractive index of the third sub-refractive layer ranges from 1.7 to 1.

8.

9. The display panel of claim 7, wherein, The second refractive layer comprises a third sub-refractive layer and a fourth sub-refractive layer, the fourth sub-refractive layer being located between the third sub-refractive layer and the first substrate, wherein the refractive index of the third sub-refractive layer ranges from 1.8 to 1.9, and the refractive index of the fourth sub-refractive layer ranges from 1.6 to 1.

7.

10. The display panel of claim 9, wherein, A second microstructure is disposed on a side of the third sub-refractive layer facing the fourth sub-refractive layer.

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