Liquid crystal display panel and display apparatus

Abstract

A liquid crystal display panel and a display apparatus. The liquid crystal display panel comprises: a liquid crystal layer, comprising liquid crystal molecules; a first polarizer, located on a first side of the liquid crystal layer and having a first light transmission axis; a second polarizer, located on a second side of the liquid crystal layer and having a second light transmission axis; and optical compensation films, located between the first polarizer and the second polarizer. The optical axes of the liquid crystal molecules are perpendicular to the optical axis of a first optical compensation film or a second optical compensation film; under a preset azimuth angle, the dark-state light leakage brightness of the liquid crystal display panel under a front viewing angle is first brightness, the dark-state light leakage brightness of the liquid crystal display panel under a side viewing angle is second brightness, the second brightness is twice the first brightness, and the side viewing angle is greater than 30 degrees. Thus, the liquid crystal display panel can greatly improve mitigate the liquid leakage problem and the color cast problem under a large viewing angle.

Description

Liquid crystal display panel and display device TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to a liquid crystal display panel and a display device. BACKGROUND

[0002] With the continuous development of display technology, liquid crystal display devices have occupied a dominant position in the display industry. The liquid crystal display device using the Advanced Super Dimension Switch (ADS) technology has become the mainstream due to its wide viewing angle, fast response speed, and high contrast ratio. In recent years, as television products continue to upgrade product specifications, the ADS display mode has gradually begun to upgrade to the HADS display mode with higher transmittance.

[0003] On the other hand, liquid crystals include positive liquid crystals and negative liquid crystals, and the orientation method of the alignment film includes rubbing alignment and optical alignment, etc. The pixel design with the best transmittance corresponding to different display modes, liquid crystal types and orientation methods is also different.

[0004] SUMMARY

[0005] Embodiments of the present disclosure provide a liquid crystal display panel and a display device. In the case where the azimuth angle is 45 degrees, the dark state light leakage brightness of the liquid crystal display panel at the normal viewing angle is a first brightness, the dark state light leakage brightness of the liquid crystal display panel at the side viewing angle is a second brightness, the second brightness is twice the first brightness, and the side viewing angle is greater than 30 degrees. Therefore, the liquid crystal display panel can greatly improve the light leakage problem and color deviation problem at a large viewing angle through the optical compensation film, so that the user can obtain a better visual effect at a larger side viewing angle.

[0006] At least one embodiment of the present disclosure further provides a liquid crystal display panel, comprising: a liquid crystal layer comprising liquid crystal molecules; a first polarizer located on a first side of the liquid crystal layer and having a first light transmission axis; a second polarizer located on a second side of the liquid crystal layer and having a second light transmission axis; an optical compensation film located between the first polarizer and the second polarizer, the optical compensation film comprising a first optical compensation layer and a second optical compensation layer, the first optical compensation layer being located between the liquid crystal layer and the second optical compensation layer, and the second optical compensation layer being located between the first optical compensation layer and the first polarizer or the second polarizer, in a preset azimuth angle, the dark state light leakage brightness of the liquid crystal display panel at the normal viewing angle is a first brightness, the dark state light leakage brightness of the liquid crystal display panel at the side viewing angle is a second brightness, the second brightness is twice the first brightness, the side viewing angle is greater than 30 degrees, and the preset azimuth angle is equal to 45, 135, 225 or 315 degrees.

[0007] For example, in a liquid crystal display panel provided in one embodiment of this disclosure, the first optical compensation layer is a +A film, and the second optical compensation layer is a +C film.

[0008] The in-plane phase delay R of the first optical compensation layer 01 Satisfying the following formula: R 01 =n1×R 0LC +mλ,

[0009] The thickness phase delay R of the second optical compensation layer th2 Satisfying the following formula: R th2 =n2×R 0LC +mλ,

[0010] Among them, R 0LC For the in-plane phase delay of the liquid crystal, n1 ranges from 1 / 4 to 3 / 4, n2 ranges from -1 / π-1 / 6 to -1 / π+1 / 6, m is a positive integer, and λ ranges from 380nm to 780nm.

[0011] For example, in a liquid crystal display panel provided in an embodiment of this disclosure, the in-plane phase delay R of the first optical compensation layer is... 01 The thickness is 125±50nm, and the phase retardation R is... th1 The in-plane phase delay R of the second optical compensation layer is 62.5 ± 25 nm (@550 nm). 01 The value range is 0±25nm, and the thickness phase delay R th2 The value is -100±50nm (@550nm).

[0012] For example, in a liquid crystal display panel provided in an embodiment of this disclosure, the combined in-plane phase delay R of the first optical compensation layer and the second optical compensation layer is... 01 The overall thickness phase delay R is 125±50nm. th1 The value is -35±50nm (@550nm).

[0013] For example, in a liquid crystal display panel provided in one embodiment of this disclosure, the first optical compensation layer is a -C film, the second optical compensation layer is a +B film, and the in-plane phase retardation R of the first optical compensation layer is... 01 The thickness phase delay R is 0±25nm. th1 The in-plane phase delay R of the second optical compensation layer is 110±50nm (@550nm). 01 The value range is 110±50nm, and the thickness phase delay R th1 The value range is 110±50nm (@550nm).

[0014] For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the comprehensive in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer is -110±50nm, the comprehensive thickness phase retardation Rth of the first optical compensation layer and the second optical compensation layer is 0±50nm (@550nm). 01 For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the comprehensive in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer is -110±50nm, the comprehensive thickness phase retardation Rth of the first optical compensation layer and the second optical compensation layer is 0±50nm (@550nm). th1 For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the comprehensive in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer is -110±50nm, the comprehensive thickness phase retardation Rth of the first optical compensation layer and the second optical compensation layer is 0±50nm (@550nm).

[0015] For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the first optical compensation layer is a -B film, the second optical compensation layer is a +B film, the in-plane phase retardation R of the first optical compensation layer is -220±50nm, the thickness phase retardation Rth of the first optical compensation layer is 0±25nm (@550nm), the in-plane phase retardation R of the second optical compensation layer is 110±50nm, and the thickness phase retardation Rth of the second optical compensation layer is 0±25nm (@550nm). 01 For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the first optical compensation layer is a -B film, the second optical compensation layer is a +B film, the in-plane phase retardation R of the first optical compensation layer is -220±50nm, the thickness phase retardation Rth of the first optical compensation layer is 0±25nm (@550nm), the in-plane phase retardation R of the second optical compensation layer is 110±50nm, and the thickness phase retardation Rth of the second optical compensation layer is 0±25nm (@550nm). th1 For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the first optical compensation layer is a -B film, the second optical compensation layer is a +B film, the in-plane phase retardation R of the first optical compensation layer is -220±50nm, the thickness phase retardation Rth of the first optical compensation layer is 0±25nm (@550nm), the in-plane phase retardation R of the second optical compensation layer is 110±50nm, and the thickness phase retardation Rth of the second optical compensation layer is 0±25nm (@550nm). 01 For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the first optical compensation layer is a -B film, the second optical compensation layer is a +B film, the in-plane phase retardation R of the first optical compensation layer is -220±50nm, the thickness phase retardation Rth of the first optical compensation layer is 0±25nm (@550nm), the in-plane phase retardation R of the second optical compensation layer is 110±50nm, and the thickness phase retardation Rth of the second optical compensation layer is 0±25nm (@550nm). th1 For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the first optical compensation layer is a -B film, the second optical compensation layer is a +B film, the in-plane phase retardation R of the first optical compensation layer is -220±50nm, the thickness phase retardation Rth of the first optical compensation layer is 0±25nm (@550nm), the in-plane phase retardation R of the second optical compensation layer is 110±50nm, and the thickness phase retardation Rth of the second optical compensation layer is 0±25nm (@550nm).

[0016] For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the comprehensive in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer is -110±50nm, the comprehensive thickness phase retardation Rth of the first optical compensation layer and the second optical compensation layer is 0±50nm (@550nm). 01 For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the comprehensive in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer is -110±50nm, the comprehensive thickness phase retardation Rth of the first optical compensation layer and the second optical compensation layer is 0±50nm (@550nm). th1 For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the comprehensive in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer is -110±50nm, the comprehensive thickness phase retardation Rth of the first optical compensation layer and the second optical compensation layer is 0±50nm (@550nm).

[0017] For example, the liquid crystal display panel provided by the embodiment of the present disclosure further comprises an array substrate located on one side of the liquid crystal layer, and a counter substrate located on the side of the liquid crystal layer away from the array substrate, the array substrate comprises gate lines extending along a first direction and data lines extending along a second direction, the first direction and the second direction intersect, and the array substrate further comprises a pixel electrode and a common electrode.

[0018] For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the pixel electrode is located on the side of the common electrode close to the liquid crystal layer, and the pixel electrode comprises a first slit, and the angle between the first slit and the first direction is less than 45 degrees.

[0019] For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the angle between the first slit and the first direction ranges from 5 degrees to 15 degrees.

[0020] For example, the liquid crystal display panel provided by an embodiment of the present disclosure further comprises: a first alignment film located on a side of the array substrate close to the liquid crystal layer; a second alignment film located on a side of the counter substrate close to the liquid crystal layer; and a black matrix comprising a first part and a second part, a normal projection of the first part on the liquid crystal layer covers a normal projection of the gate line on the liquid crystal layer, and a normal projection of the second part on the liquid crystal layer covers a normal projection of the data line on the liquid crystal layer.

[0021] For example, in the liquid crystal display panel provided by an embodiment of the present disclosure, the liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second part on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 5.0 um to 6.5 um.

[0022] For example, in the liquid crystal display panel provided by an embodiment of the present disclosure, the liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second part on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 5.0 um to 6.5 um.

[0023] For example, in the liquid crystal display panel provided by an embodiment of the present disclosure, the liquid crystal molecules are negative liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second part on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 2.0 um to 3.0 um.

[0024] For example, in the liquid crystal display panel provided by an embodiment of the present disclosure, the liquid crystal molecules are negative liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second part on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 2.0 um to 3.0 um.

[0025] For example, in the liquid crystal display panel provided by an embodiment of the present disclosure, the common electrode is located on a side of the pixel electrode close to the liquid crystal layer, and the common electrode comprises a second slit, and an angle between the second slit and the second direction is less than 45 degrees.

[0026] For example, in the liquid crystal display panel provided by an embodiment of the present disclosure, an angle between the second slit and the second direction ranges from 5 degrees to 15 degrees.

[0027] For example, the liquid crystal display panel provided by the embodiment of the present disclosure further comprises: a first alignment film located on one side of the array substrate close to the liquid crystal layer; a second alignment film located on one side of the counter substrate close to the liquid crystal layer; and a black matrix comprising a first part and a second part, a normal projection of the first part on the liquid crystal layer covers a normal projection of the gate line on the liquid crystal layer, and a normal projection of the second part on the liquid crystal layer covers a normal projection of the data line on the liquid crystal layer.

[0028] For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second part on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 1.0 um to 3.0 um.

[0029] For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second part on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 1.0 um to 3.0 um.

[0030] For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second part on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 1.0 um to 3.0 um.

[0031] For example, in the liquid crystal display panel provided by the embodiment of the present disclosure, the liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second part on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 1.0 um to 3.0 um.

[0032] For example, the liquid crystal display panel provided by the embodiment of the present disclosure further comprises: an additional electrode located on the counter substrate, a normal projection of the additional electrode on the liquid crystal layer overlaps a normal projection of the common electrode on the liquid crystal layer, the liquid crystal molecules are positive liquid crystals or negative liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second part on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 0 um to 3.0 um.

[0033] The display device according to any one of the above-mentioned embodiments can also be used as a display device. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only related to some embodiments of the present disclosure and not limited to the present disclosure.

[0035] FIG. 1 is a front view and a side view comparison diagram of a flat field liquid crystal display panel;

[0036] FIG. 2A is an exploded schematic diagram of a liquid crystal display panel according to an embodiment of the present disclosure;

[0037] FIG. 2B is a dark state light leakage comparison diagram of a liquid crystal display panel according to an embodiment of the present disclosure;

[0038] FIG. 3 is a schematic diagram of azimuth angle and side view angle of a liquid crystal display panel according to an embodiment of the present disclosure;

[0039] FIG. 4 is a compensation path schematic diagram of a liquid crystal display panel according to an embodiment of the present disclosure;

[0040] FIG. 5 is a compensation path schematic diagram of another liquid crystal display panel according to an embodiment of the present disclosure;

[0041] FIG. 6 is a compensation path schematic diagram of another liquid crystal display panel according to an embodiment of the present disclosure;

[0042] FIG. 7 is a structural schematic diagram of another liquid crystal display panel according to an embodiment of the present disclosure;

[0043] FIG. 8 is a partial planar schematic diagram of an array substrate in a liquid crystal display panel according to an embodiment of the present disclosure;

[0044] FIG. 9 is an overlapping schematic diagram of a data line and a black matrix in a liquid crystal display panel according to an embodiment of the present disclosure;

[0045] FIGS. 10A-10E are step schematic diagrams of a manufacturing method of an array substrate according to an embodiment of the present disclosure;

[0046] FIGS. 11A-11E are step schematic diagrams of a manufacturing method of an array substrate according to an embodiment of the present disclosure;

[0047] FIG. 12 is a partial planar schematic diagram of an array substrate in another liquid crystal display panel according to an embodiment of the present disclosure;

[0048] FIG. 13 is an overlapping schematic diagram of a data line and a black matrix in another liquid crystal display panel according to an embodiment of the present disclosure;

[0049] FIG. 14 is a structural schematic diagram of another liquid crystal display panel according to an embodiment of the present disclosure;

[0050] FIG. 15 is a schematic diagram of the overlap of a data line and a black matrix in another liquid crystal display panel according to an embodiment of the present disclosure; and

[0051] FIG. 16 is a schematic diagram of a display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present disclosure.

[0053] Unless otherwise defined, technical terms or scientific terms used in the present disclosure should be understood as the common meanings of the terms to those of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second", and similar terms used in the present disclosure do not indicate any order, quantity, or importance, but are used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects.

[0054] FIG. 1 is a front view and a side view comparison diagram of a planar electric field liquid crystal display panel. As shown in FIG. 1, due to the characteristics of the planar electric field liquid crystal display panel itself, at a large viewing angle, the upper and lower polarizers are not perpendicular, thereby causing light leakage.

[0055] To this end, the present embodiments provide a liquid crystal display panel, comprising: a liquid crystal layer comprising liquid crystal molecules; a first polarizer located at a first side of the liquid crystal layer and having a first light transmission axis; a second polarizer located at a second side of the liquid crystal layer and having a second light transmission axis; an optical compensation film located between the first polarizer and the second polarizer; a normal projection of an optical axis of the liquid crystal molecules on the first polarizer is parallel to the first light transmission axis or the second light transmission axis, the optical compensation film comprises a first optical compensation layer and a second optical compensation layer, the first optical compensation layer is located between the liquid crystal layer and the second optical compensation layer, the second optical compensation layer is located between the first optical compensation layer and the first polarizer or the second polarizer, the optical axis of the liquid crystal molecules is perpendicular to an optical axis of the first optical compensation film or the second optical compensation film, at a preset azimuth angle, a dark state light leakage brightness of the liquid crystal display panel at a normal viewing angle is a first brightness, a dark state light leakage brightness of the liquid crystal display panel at a side viewing angle is a second brightness, the second brightness is twice the first brightness, the side viewing angle is greater than 30 degrees, and the preset azimuth angle is equal to 45 degrees, 135 degrees, 225 degrees or 315 degrees. Thus, the liquid crystal display panel can greatly improve the light leakage problem and the color deviation problem at a large viewing angle through the optical compensation film, so that a user can obtain a better visual effect at a larger side viewing angle.

[0056] The present embodiments also provide a display device comprising the liquid crystal display panel described above. Thus, the display device can also greatly improve the light leakage problem and the color deviation problem at a large viewing angle, so that a user can obtain a better visual effect at a larger side viewing angle.

[0057] In the following, the liquid crystal display panel and the display device provided by the present embodiments are described in detail in combination with the accompanying drawings.

[0058] Figure 2A is an exploded schematic view of a liquid crystal display panel according to an embodiment of the present disclosure. As shown in Figure 2A, the liquid crystal display panel 200 includes a liquid crystal layer 230, a first polarizer 210, a second polarizer 220, and an optical compensation film 240; the liquid crystal layer 230 includes liquid crystal molecules 235, the first polarizer 210 is located on a first side of the liquid crystal layer 230 and has a first light transmission axis 271; the second polarizer 220 is located on a second side of the liquid crystal layer 230 and has a second light transmission axis 272; the optical compensation film 240 is located between the first polarizer 210 and the second polarizer 120; a normal projection of an optical axis of the liquid crystal molecules in the liquid crystal layer 230 on the first polarizer 210 is parallel to the first light transmission axis 271 and / or the second light transmission axis 272, the optical compensation film 240 includes a first optical compensation layer 241 and a second optical compensation layer 242, the first optical compensation layer 241 is located between the liquid crystal layer 230 and the second optical compensation layer 242, and the second optical compensation layer 242 is located between the first optical compensation layer 241 and the first polarizer 210 or the second polarizer 220; the optical axis of the liquid crystal molecules is perpendicular to the optical axis of the first optical compensation film 241 or the second optical compensation film 242, at a preset azimuth angle, the dark state light leakage brightness of the liquid crystal display panel 200 at a normal viewing angle is a first brightness, the dark state light leakage brightness of the liquid crystal display panel 200 at a side viewing angle is a second brightness, the second brightness is twice the first brightness, and the side viewing angle is greater than 30 degrees. It should be noted that the preset azimuth angle can be 45, 135, 225, or 315 degrees.

[0059] Figure 2B is a dark state light leakage comparison diagram of a liquid crystal display panel according to an embodiment of the present disclosure. As shown in Figure 2B, at an azimuth angle of 45 degrees, the dark state light leakage brightness of the embodiment and the comparative example (i.e., a conventional liquid crystal display panel) at a normal viewing angle is a first brightness B1, the dark state light leakage brightness of the comparative example at a side viewing angle of about 17 degrees is a second brightness B2, the second brightness B2 is twice the first brightness B1, and the dark state light leakage brightness of the embodiment at a side viewing angle of about 37 degrees is the second brightness B2. As can be seen, through the above-mentioned optical compensation film, the liquid crystal display panel can still maintain a lower light leakage and color deviation at a larger side viewing angle (greater than 30 degrees). Thus, the liquid crystal display panel can greatly improve the light leakage problem and the color deviation problem at a large viewing angle through the optical compensation film, so that the user can obtain a better visual effect at a larger side viewing angle.

[0060] It should be noted that, as shown in Figure 2B, as the side viewing angle increases, the dark state light leakage brightness of the embodiment and the comparative example both gradually increases first and then gradually decreases. This is because, as the side viewing angle increases (e.g., greater than 70 degrees), the light output of the liquid crystal display panel at this angle is itself less, thereby causing the dark state light leakage brightness to also decrease.

[0061] For example, the first side and the second side are opposite sides in the thickness direction of the liquid crystal layer.

[0062] For example, the first light transmission axis and the second light transmission axis are perpendicular to each other.

[0063] In some examples, the dark state light leakage luminance of the liquid crystal display panel is the second luminance when the viewing angle is greater than 35 degrees at the preset azimuth angle, so as to have a greater excellent viewing angle.

[0064] FIG. 3 is a schematic diagram of an azimuth angle and a viewing angle of a liquid crystal display panel according to an embodiment of the present disclosure. As shown in FIG. 3, the azimuth angle is an angle on the display surface of the liquid crystal display panel that is at a certain angle with the row direction (for example, the direction in which the gate lines extend) or the column direction (for example, the direction in which the data lines extend) of the liquid crystal display panel. Generally, when the azimuth angle is 45, 135, 225, or 315 degrees, the light leakage of the liquid crystal display panel is the most serious. The above-mentioned normal viewing angle and the viewing angle are the included angle between the line of sight and the normal line of the liquid crystal display panel.

[0065] In some examples, as shown in FIG. 2A, the first optical compensation layer 241 is located between the liquid crystal layer 230 and the second optical compensation layer 242, and the second optical compensation layer 242 is located between the first optical compensation layer 241 and the second polarizer 220. Of course, embodiments of the present disclosure include but are not limited to this, and the second optical compensation layer can also be located between the first optical compensation layer and the first polarizer.

[0066] In some examples, the first optical compensation layer 241 is a +A film, the second optical compensation layer 242 is a -C film, the in-plane phase retardation R 01 satisfies the following formula: R 01 = n1 x R 0LC + mλ,

[0067] The thickness phase retardation R th2 of the second optical compensation layer 242 satisfies the following formula: R th2 = n2 x R 0LC + mλ,

[0068] wherein R 0LC is the in-plane phase retardation of the liquid crystal, n1 is in the range of 1 / 4 to 3 / 4, n2 is in the range of -1 / π-1 / 6 to -1 / π+1 / 6, m is a positive integer, and λ is in the range of 380 nm to 780 nm.

[0069] Thus, by combining the +A film and the +C film and making them satisfy the above parameters, the optical compensation film can make the polarized light passing through the first polarizer and the liquid crystal layer first pass through the +A film and the +C film for phase compensation, so that the polarization state of the light is changed to be in a cross-Nicol relation with the second polarizer, thereby inhibiting the light leakage phenomenon of the dark state of the liquid crystal display panel. Thus, the liquid crystal display panel can greatly improve the light leakage problem and the color shift problem at a large viewing angle by the optical compensation film, so that the user can obtain a better visual effect at a larger side viewing angle. It should be noted that the light leakage brightness of the dark state of a general liquid crystal display panel is twice the first brightness when the side viewing angle is about 17 degrees, and thus the liquid crystal display panel provided by the embodiments of the present disclosure greatly improves the light leakage problem and the color shift problem at a large viewing angle.

[0070] In some examples, the side viewing angle is greater than 37 degrees by using the optical compensation film described above. Thus, the liquid crystal display panel can still have a lower light leakage and color shift at a larger side viewing angle (greater than 37 degrees).

[0071] It should be noted that the in-plane phase retardation refers to the in-plane retardation of light with a wavelength of λ in the corresponding film layer, and the thickness phase retardation refers to the retardation of light with a wavelength of λ in the thickness direction of the corresponding film layer. In addition, the "+A film" and the "+C film" herein refer to classification according to the refractive index anisotropy of each film layer. The material through which light passes has refractive indexes (nx, ny, nz) with respect to the x, y and z axes; if the material has the same refractive index in the x, y and z axes, the material can be called isotropic; if the material has partially or completely different refractive indexes, the material can be called anisotropic. When the thickness direction of the film layer is assumed to be the z direction, one of the two plane directions of the film layer is the x direction, and the other is the y direction. When the film layer has the same refractive index in two directions but a different refractive index in one direction, the film layer is called a uniaxial film; when the film layer has different refractive indexes in all three directions, the film layer is called a biaxial film.

[0072] In the uniaxial film, when the film layer has different refractive indexes in the plane direction, the film layer is called an A film. In this case, when nx>ny=nz, the film layer can be called a +A film; when the formula nx=nz>ny is required, the film layer can be called a -A film.

[0073] Also in the uniaxial film, when the film layer has different refractive indexes in the thickness direction, the film layer is called a C film. In this case, when nz>nx=ny, the film layer can be called a +C film; when nx=ny>nz, the film layer can be called a -C film.

[0074] Similarly, a biaxial film refers to a film in which the phase retardation in the in-plane and thickness directions are completely different. In a biaxial film, when nz > nx > ny, the film layer can be called a +B film, and when nx > ny > nz, the film layer can be called a -B film.

[0075] In some examples, the in-plane phase delay R of the first optical compensation layer 241 01 The thickness is 125±50nm, and the phase retardation R is... th1 The in-plane phase delay R of the second optical compensation layer 242 is 62.5 ± 25 nm (@550 nm). 01 The value range is 0±25nm, and the thickness phase delay R th2 The phase delay is -100±50nm (@550nm). By ensuring that the in-plane phase delay and thickness phase delay of the first optical compensation layer, and the in-plane phase delay and thickness phase delay of the second optical compensation layer satisfy the above parameter range, the optical compensation film can achieve a good phase compensation effect. It should be noted that the above 62.5±25nm (@550nm) refers to a phase delay of 62.5±25nm for light with a wavelength of 550nm; the above -100±50nm (@550nm) refers to a phase delay of -100±50nm for light with a wavelength of 550nm; other similar limitations below are analogous.

[0076] In some examples, the combined in-plane phase delay R of the first optical compensation layer 241 and the second optical compensation layer 242 01 The overall thickness phase delay R is 125±50nm. th1 The value is -35±50nm (@550nm).

[0077] Figure 4 is a schematic diagram of the compensation path of a liquid crystal display panel according to an embodiment of this disclosure. As shown in Figure 4, the polarized light that has passed through the first polarizer and the liquid crystal layer is compensated by the +A film, and its polarization state moves from the starting point to the middle point along the arc trajectory shown in Figure 4. Then, after compensation by the +C film, its polarization state moves from the middle point to the end point along the arc trajectory (arc on the meridian) shown in Figure 4, thus becoming polarized light (outgoing light polarization) before passing through the second polarizer. In this state, the polarization of the outgoing light is in a cross-Nicol relation with the second polarizer, thus suppressing light leakage in the dark state.

[0078] In some examples, the first optical compensation layer 241 is a -C film, the second optical compensation layer 242 is a +B film, and the in-plane phase retardation R of the first optical compensation layer is... 01 The thickness phase delay R is 0±25nm. th1 The in-plane phase delay R of the second optical compensation layer is 110±50nm (@550nm).01 the range of 110±50nm, the thickness phase retardation Rth th1 the range of 110±50nm (@550nm). Thus, by combining the -C film and the +B film and making them satisfy the above parameters, the optical compensation film can make the polarized light passing through the first polarizer and the liquid crystal layer first pass through the -C film and the +B film for phase compensation, so that its polarization state changes to be in the cross-Nicol relation with the second polarizer, thereby inhibiting the light leakage phenomenon in the dark state of the liquid crystal display panel. Thus, the liquid crystal display panel can greatly improve the light leakage problem and color shift problem at large viewing angles through the optical compensation film, so that the user can obtain better visual effect at a larger side viewing angle.

[0079] In some examples, the first optical compensation layer 241 and the second optical compensation layer 242 have a combined in-plane phase retardation R 01 of 110±50nm, a combined thickness phase retardation Rth th1 of 0±50nm (@550nm).

[0080] Figure 5 is a schematic diagram of a compensation path of another liquid crystal display panel according to an embodiment of the present disclosure. As shown in Figure 5, the polarized light that has passed through the first polarizer and the liquid crystal layer is compensated by the -C film, and its polarization state moves along the circular arc trajectory shown in Figure 5 (circular arc on the meridian) from the starting point to the intermediate point, and then is compensated by the +B film, and its polarization state moves along the circular arc trajectory shown in Figure 5 from the intermediate point to the terminal point, thereby becoming polarized light (outgoing light polarization) before passing through the second polarizer. In this state, the outgoing light polarization is in the cross-Nicol relation with the second polarizer, so that the light leakage in the dark state is inhibited.

[0081] In some examples, the first optical compensation layer 241 is a -B film, and the second optical compensation layer 242 is a +B film, the first optical compensation layer has an in-plane phase retardation R 01 of -220±50nm, a thickness phase retardation Rth th1 of 0±25nm (@550nm), and the second optical compensation layer has an in-plane phase retardation R 01 of 110±50nm, a thickness phase retardation Rth th1 of 0±25nm (@550nm). Thus, by combining the -B film and the +B film and making them satisfy the above parameters, the liquid crystal display panel can still maintain low light leakage and color shift at a larger side viewing angle (greater than 35 degrees). Thus, the liquid crystal display panel can greatly improve the light leakage problem and color shift problem at large viewing angles through the optical compensation film, so that the user can obtain better visual effect at a larger side viewing angle.

[0082] In some examples, the combined in-plane retardation R 01 is -110 ± 50 nm, and the combined thickness retardation R th1 is 0 ± 50 nm (@ 550 nm).

[0083] FIG. 6 is a schematic diagram of a compensation path of another liquid crystal display panel according to an embodiment of the present disclosure. As shown in FIG. 6, polarized light (incident light polarization) that has passed through a first polarizer and a liquid crystal layer and then passed through the above-mentioned optical compensation film travels along the trajectory shown in FIG. 6 and becomes polarized light (exit light polarization) before passing through a second polarizer. In this state, the exit light polarization is in a cross-Nicol relation with the second polarizer, so that leakage of light in a dark state is suppressed.

[0084] FIG. 7 is a schematic diagram of a structure of another liquid crystal display panel according to an embodiment of the present disclosure; FIG. 8 is a schematic diagram of a partial plan view of an array substrate in a liquid crystal display panel according to an embodiment of the present disclosure; and FIG. 9 is a schematic diagram of an overlap of a data line and a black matrix in a liquid crystal display panel according to an embodiment of the present disclosure.

[0085] As shown in FIGS. 7 and 8, the liquid crystal display panel 200 includes an array substrate 100 and an opposed substrate 290; the array substrate 100 is located on one side of a liquid crystal layer 230; and the opposed substrate 290 is located on a side of the liquid crystal layer 230 that is away from the array substrate 100.

[0086] As shown in FIGS. 7 and 8, the array substrate 100 includes gate lines 120 extending in a first direction and data lines 130 extending in a second direction, the first direction and the second direction intersecting. The array substrate 100 further includes pixel electrodes 140 and a common electrode 150.

[0087] As shown in FIGS. 7 and 8, the pixel electrodes 140 are located on a side of the common electrode 150 that is close to the liquid crystal layer 230, and at this time the pixel electrodes 140 include first slits 145. Thus, a horizontal electric field can be formed between the pixel electrodes 140 and the common electrode 150 for driving liquid crystal molecules in the liquid crystal layer to deflect.

[0088] For example, the first direction described above can be a row direction of the liquid crystal display panel, and the second direction described above can be a column direction of the liquid crystal display panel.

[0089] In some examples, as shown in FIG. 8, an angle between the first slits 145 and the first direction is less than 45 degrees. Thus, the liquid crystal display panel can adopt an ADS mode.

[0090] In some examples, the angle between the first slit 145 and the first direction ranges from 5 degrees to 15 degrees, for example, from 7 degrees to 11 degrees. In this way, while the liquid crystal display panel has an ultra-high contrast ratio, the liquid crystal display panel has a smaller driving voltage of the liquid crystal by setting the above-mentioned slit angle.

[0091] In some examples, as shown in FIGS. 7 and 8, the liquid crystal display panel 200 further includes a first alignment film 250 and a second alignment film 260; the first alignment film 250 is located on the side of the array substrate 100 close to the liquid crystal layer 230; and the second alignment film 260 is located on the side of the opposite substrate 290 close to the liquid crystal layer 230.

[0092] In some examples, as shown in FIG. 9, the liquid crystal display panel 200 further includes a black matrix 270, which includes a first portion 272 and a second portion 274; the orthographic projection of the first portion 272 on the liquid crystal layer 230 covers the orthographic projection of the gate line 120 on the liquid crystal layer 230; and the orthographic projection of the second portion 274 on the liquid crystal layer 230 covers the orthographic projection of the data line 130 on the liquid crystal layer 230.

[0093] In some examples, as shown in FIG. 9, the liquid crystal molecules are positive liquid crystals, the first alignment film 250 and the second alignment film 260 are rubbing alignment films, and the distance D1 between the orthographic projection of the edge of the second portion 274 on the liquid crystal layer 230 and the orthographic projection of the edge of the data line 130 on the liquid crystal layer 230 ranges from 5.0 um to 6.5 um.

[0094] Since the first alignment film and the second alignment film are both formed by a rubbing alignment process, and the rubbing direction is along the extension direction of the first slit or the second slit, the height (for example, ) of the data line and the height (for example, ) of the pixel electrode are different, there is a height step difference, and therefore there is a rubbing orientation weak area on both sides of the data line. The liquid crystal molecules in this area are not uniformly oriented, which can cause side view angle light leakage. The liquid crystal display panel provided by the embodiments of the present disclosure sets the distance between the orthographic projection of the edge of the second portion of the black matrix on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer to range from 5.0 um to 6.5 um, thereby effectively avoiding the light leakage problem of the rubbing orientation weak area, and also avoiding the crosstalk problem between different color sub-pixels.

[0095] In some examples, the liquid crystal molecules are positive liquid crystals, the first alignment film 250 and the second alignment film 260 are optical alignment films, and the distance D1 between the edge of the second portion 174 in orthographic projection on the liquid crystal layer 230 and the edge of the data line 130 in orthographic projection on the liquid crystal layer 230 is in a range from 1.0 um to 3.0 um. When the first alignment film and the second alignment film are formed by using the optical alignment process, there is no rubbing orientation weak area on both sides of the data line, and thus the second portion of the black matrix can be set to be relatively narrow.

[0096] In some examples, the liquid crystal molecules are negative liquid crystals, the first alignment film 250 and the second alignment film 260 are rubbing alignment films, and the distance D1 between the edge of the second portion 174 in orthographic projection on the liquid crystal layer 230 and the edge of the data line 130 in orthographic projection on the liquid crystal layer 230 is in a range from 2.0 um to 3.0 um. Although the first alignment film and the second alignment film are both formed by using the rubbing alignment process, because the negative liquid crystals are used, the rubbing direction is perpendicular to the direction of the first slit or the second slit, so that the rubbing orientation weak area on both sides of the data line is relatively small. The liquid crystal display panel provided by the embodiment of the present disclosure sets the distance D1 between the edge of the second portion of the black matrix in orthographic projection on the liquid crystal layer and the edge of the data line in orthographic projection on the liquid crystal layer to be in a range from 2.0 um to 3.0 um, so that the light leakage problem of the rubbing orientation weak area can be effectively avoided, and the crosstalk problem between different color sub-pixels can also be avoided.

[0097] In some examples, the liquid crystal molecules are negative liquid crystals, the first alignment film 250 and the second alignment film 260 are optical alignment films, and the distance D1 between the edge of the second portion 174 in orthographic projection on the liquid crystal layer 230 and the edge of the data line 130 in orthographic projection on the liquid crystal layer 230 is in a range from 1.0 um to 3.0 um. When the first alignment film and the second alignment film are formed by using the optical alignment process, there is no rubbing orientation weak area on both sides of the data line, and thus the second portion of the black matrix can be set to be relatively narrow.

[0098] In some examples, as shown in FIG. 7, the array substrate 100 includes a first substrate 101, and the pixel electrode 140 and the common electrode 150 are located on a side of the first substrate 101 close to the liquid crystal layer 230. At this time, the array substrate 100 further includes a first insulating layer 191 and a second insulating layer 192, the first insulating layer 191 is located between the pixel electrode 140 and the common electrode 150, and the second insulating layer 192 is located between the common electrode 150 and the first alignment film 250.

[0099] For example, the first substrate 101 can be a glass substrate, a plastic substrate, or a quartz substrate. Of course, the embodiments of the present disclosure include but are not limited to this.

[0100] For example, the material of the first insulating layer 191 and the second insulating layer 192 can be selected from one or more of silicon oxide, silicon nitride, and silicon oxynitride.

[0101] In some examples, as shown in FIG. 7, the counter substrate 290 includes a second substrate 291, and the black matrix 270 is disposed on the second substrate 291.

[0102] In some examples, as shown in FIG. 7, the counter substrate 290 further includes color filters 275 located between the black matrix 270, for converting light transmitted through the liquid crystal layer 230 into other colors, thereby realizing color display.

[0103] In some examples, as shown in FIG. 7, the second alignment film 260 is located on the side of the black matrix 270 close to the liquid crystal layer 230.

[0104] In some examples, as shown in FIG. 7, the counter substrate 290 further includes a protective film 298 located on the side of the second polarizer 220 away from the liquid crystal layer 230.

[0105] In the manufacturing process of the liquid crystal display panel provided in the embodiments of the present disclosure, the array substrate can adopt a 5Mask or 6Mask process flow, i.e., 1ITO→Gate→HTM SD (SD+Active)→PVX→2ITO. The 1ITO can be used to form a common electrode, and the 2ITO can be used to form a pixel electrode. There is no insulating layer between the 1ITO and the Gate, and the two are directly connected. The bridge wire can be made of the SD or 2ITO layer.

[0106] FIGS. 10A-10E are schematic diagrams of steps of a manufacturing method of an array substrate provided in an embodiment of the present disclosure. As shown in FIG. 10A, a first electrode layer 1ITO is formed on a substrate; as shown in FIG. 10B, a gate layer Gate is formed on the first electrode layer 1ITO; as shown in FIG. 10C, a source-drain metal layer SD and an active layer Active are formed on the side of the gate layer Gate away from the first electrode layer 1ITO; as shown in FIG. 10D, a passivation layer PVX is formed on the side of the source-drain metal layer SD and the active layer Active away from the first electrode layer 1ITO; and as shown in FIG. 10E, a second electrode layer 2ITO is formed on the passivation layer PVX, and the second electrode layer 2ITO has a slit.

[0107] In the manufacturing process of the liquid crystal display panel provided in the embodiments of the present disclosure, the counter substrate can adopt a 5Mask process flow, i.e., a process flow of BM→R→G→B→PS, where BM is a black matrix, R, G, and B are color filters of three colors, and PS is a spacer.

[0108] FIGS. 11A-11E are schematic diagrams of steps of a method of manufacturing an array substrate according to an embodiment of the present disclosure. As shown in FIG. 11A, a black matrix BM is formed. As shown in FIG. 11B, an R color filter is formed on the black matrix BM. As shown in FIG. 11C, a G color filter is formed near the R color filter. As shown in FIG. 11D, a B color filter is formed near the G color filter. As shown in FIG. 11E, a spacer PS is formed on a side of the R, G, and B color filters away from the black matrix BM.

[0109] In some examples, the liquid crystal display panel can adopt a Dual Gate design, i.e., two sub-pixel columns share one data line. In this case, after the array substrate and the counter substrate are assembled, the spacer PS can be located on the data line, i.e., the orthogonal projection of the spacer PS on the first substrate overlaps the orthogonal projection of the data line on the first substrate. In the overlapping area of the spacer and the data line, the data line can be designed to be locally widened to form a base, and the surrounding double-layer metal can form a barrier wall to reduce the sliding range of the spacer PS, reduce the mura risk, and improve the display effect.

[0110] In some examples, after the array substrate and the counter substrate are assembled, the spacer PS can also be located on the common electrode line, and the common electrode line is locally widened to form a base to support the spacer PS and reduce the sliding range of the spacer PS. At the same time, the widening of the common electrode line can also help to improve the uniformity of the common voltage of the entire panel. Moreover, in this case, the data line is not widened, and the lateral capacitance between the data line and the surrounding electrodes is small, which can reduce the data line capacitance load and help to improve the pixel charging rate.

[0111] FIG. 12 is a schematic diagram of a partial plan view of an array substrate of another liquid crystal display panel according to an embodiment of the present disclosure; and FIG. 13 is a schematic diagram of an overlap of a data line and a black matrix of another liquid crystal display panel according to an embodiment of the present disclosure. As shown in FIG. 12, the common electrode 150 is located on a side of the pixel electrode 140 close to the liquid crystal layer 230, and in this case, the common electrode 150 includes a second slit 155. Thus, a horizontal electric field can be formed between the pixel electrode 140 and the common electrode 150 for driving the liquid crystal molecules in the liquid crystal layer to deflect.

[0112] As shown in FIG. 12, the angle between the second slit 155 and the second direction is less than 45 degrees. Thus, the liquid crystal display panel can implement an HADS mode.

[0113] In some examples, as shown in FIG. 12, the angle between the second slit 155 and the second direction ranges from 5 degrees to 15 degrees, for example, from 7 degrees to 11 degrees. Thus, while the liquid crystal display panel has an ultrahigh contrast ratio, by setting the above-mentioned slit angle, the liquid crystal display panel has a relatively small driving voltage of the liquid crystal.

[0114] In some examples, the liquid crystal display panel 200 further comprises a first alignment film 250, a second alignment film 260 and a black matrix 270; the first alignment film 250 is located on the side of the array substrate 100 close to the liquid crystal layer 230; the second alignment film 260 is located on the side of the opposite substrate 290 close to the liquid crystal layer 230. For details, please refer to the related description of FIG. 7, which will not be repeated here.

[0115] In some examples, as shown in FIG. 13, the liquid crystal display panel 200 further comprises a black matrix 270, which comprises a first part 272 and a second part 274; the orthographic projection of the first part 272 on the liquid crystal layer 230 covers the orthographic projection of the gate line 120 on the liquid crystal layer 230, and the orthographic projection of the second part 274 on the liquid crystal layer 230 covers the orthographic projection of the data line 130 on the liquid crystal layer 230.

[0116] In some examples, the liquid crystal molecules are positive liquid crystals, the first alignment film 250 and the second alignment film 260 are rubbing alignment films, and the distance between the orthographic projection of the edge of the second part 174 on the liquid crystal layer 230 and the orthographic projection of the edge of the data line 130 on the liquid crystal layer 230 is in the range of 1.0um-3.0um. At this time, there is no light leakage area on both sides of the data line, so the liquid crystal display panel can effectively avoid the light leakage problem of the rubbing orientation weak area by setting the distance between the orthographic projection of the edge of the second part of the black matrix on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer in the range of 1.0um-3.0um, and also can avoid the crosstalk problem between different color sub-pixels.

[0117] In some examples, the liquid crystal molecules are positive liquid crystals, the first alignment film 250 and the second alignment film 260 are optical alignment films, and the distance between the orthographic projection of the edge of the second part 174 on the liquid crystal layer 230 and the orthographic projection of the edge of the data line on the liquid crystal layer is in the range of 0um-2.0um. When the first alignment film and the second alignment film are made by optical alignment process, there is no rubbing orientation weak area on both sides of the data line, so the second part of the black matrix can be set narrower.

[0118] In some examples, the liquid crystal molecules are negative liquid crystals, the first alignment film 250 and the second alignment film 260 are rubbing alignment films, and the distance between the orthographic projection of the edge of the second part 174 on the liquid crystal layer 230 and the orthographic projection of the edge of the data line 130 on the liquid crystal layer 230 is in the range of 2.0um-3.0um. At this time, there is a light leakage problem on both sides of the data line, so the distance between the orthographic projection of the edge of the second part 174 on the liquid crystal layer 230 and the orthographic projection of the edge of the data line 130 on the liquid crystal layer 230 needs to be set in the range of 2.0um-3.0um.

[0119] In some examples, the liquid crystal molecules are negative liquid crystals, the first alignment film 250 and the second alignment film 260 are optical alignment films, and a distance between an edge of the second portion 174 on the orthographic projection of the liquid crystal layer 230 and an edge of the data line 130 on the orthographic projection of the liquid crystal layer 230 ranges from 0 um to 3.0 um.

[0120] FIG. 14 is a structural schematic diagram of another liquid crystal display panel according to an embodiment of the present disclosure; and FIG. 15 is a schematic diagram of the overlap of a data line and a black matrix in another liquid crystal display panel according to an embodiment of the present disclosure. As shown in FIG. 14, the liquid crystal display panel 200 further includes an additional electrode 160 on the opposite substrate 290; the orthographic projection of the additional electrode 160 on the liquid crystal layer 230 overlaps with the orthographic projection of the common electrode 150 on the liquid crystal layer 230, so that an electric field perpendicular to the array substrate or the opposite substrate can be formed between the additional electrode and the common electrode; the electric field in the vertical direction can exert a force on the ions in the vertical direction to stabilize the ions and reduce the probability of horizontal migration of the ions, thereby avoiding the change of the electric field generated between the pixel electrode and the common electrode due to the migration and aggregation of the ions, effectively improving the line residue phenomenon of the liquid crystal display panel, and improving the display effect of the liquid crystal display panel.

[0121] For example, as shown in FIG. 14, the additional electrode 160 can be a continuous full-area electrode. Of course, embodiments of the present disclosure include but are not limited to this. In addition, the voltage applied to the additional electrode 160 is different from the voltage applied to the common electrode 150, so as to form an electric field perpendicular to the array substrate or the opposite substrate between the additional electrode and the common electrode.

[0122] In some examples, as shown in FIG. 14, the array substrate 100 includes a first substrate 101, and the pixel electrode 140 and the common electrode 150 are located on a side of the first substrate 101 close to the liquid crystal layer 230. At this time, the array substrate 100 further includes a first insulating layer 191 and a second insulating layer 192, the first insulating layer 191 is located between the pixel electrode 140 and the common electrode 150, and the second insulating layer 192 is located between the common electrode 150 and the first alignment film 250.

[0123] For example, the first substrate 101 can be a glass substrate, a plastic substrate or a quartz substrate. Of course, embodiments of the present disclosure include but are not limited to this.

[0124] For example, the material of the first insulating layer 191 and the second insulating layer 192 can be selected from one or more of silicon oxide, silicon nitride and silicon oxynitride.

[0125] In some examples, as shown in FIG. 14, the opposite substrate 290 includes a second substrate 291, and the black matrix 270 is arranged on the second substrate 291.

[0126] In some examples, as shown in FIG. 14, the opposite substrate 290 further comprises color filters 275 between the black matrix 270, for converting the light transmitted through the liquid crystal layer 230 into other colors, thereby realizing color display.

[0127] In some examples, as shown in FIG. 14, the second alignment film 260 is located on the side of the black matrix 270 close to the liquid crystal layer 230.

[0128] In some examples, as shown in FIG. 14, the opposite substrate 290 further comprises a protective film 298 on the side of the second polarizer 220 away from the liquid crystal layer 230.

[0129] In some examples, as shown in FIG. 15, the liquid crystal molecules are positive liquid crystal or negative liquid crystal, the first alignment film 250 and the second alignment film 260 are optical alignment films, and the distance between the edge of the second part 174 on the orthographic projection of the liquid crystal layer 230 and the edge of the data line 130 on the orthographic projection of the liquid crystal layer 230 is in the range of 0 um to 3.0 um.

[0130] At least one embodiment of the present disclosure also provides a display device. FIG. 16 is a schematic diagram of a display device provided by an embodiment of the present disclosure. As shown in FIG. 16, the display device 500 comprises the liquid crystal display panel 200 described above. Thus, the display device can also greatly improve the light leakage problem and color deviation problem under large viewing angle, so that the user can obtain better visual effect under a larger side viewing angle.

[0131] For example, the display device can be a television, a display, an electronic picture frame, an electronic photo frame, a navigator, a notebook computer, a tablet computer, a smart phone, or other electronic products with display function.

[0132] The following points need to be explained:

[0133] (1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can be referred to the general design.

[0134] (2) In the case of no conflict, the features in the same and different embodiments of the present disclosure can be combined with each other.

[0135] The above description is only exemplary embodiments of the present disclosure, and is not intended to limit the protection scope of the present disclosure, which is determined by the appended claims.

Claims

1. A liquid crystal display panel, comprising: a liquid crystal layer comprising liquid crystal molecules; a first polarizer located on a first side of the liquid crystal layer and having a first light transmission axis; a second polarizer located on a second side of the liquid crystal layer and having a second light transmission axis; an optical compensation film located between the first polarizer and the second polarizer, wherein the optical compensation film comprises a first optical compensation layer and a second optical compensation layer, the first optical compensation layer is located between the liquid crystal layer and the second optical compensation layer, and the second optical compensation layer is located between the first optical compensation layer and the first polarizer and / or the second polarizer, wherein, at a preset azimuth angle, a dark state light leakage brightness of the liquid crystal display panel at a front viewing angle is a first brightness, and a dark state light leakage brightness of the liquid crystal display panel at a side viewing angle is a second brightness, the second brightness is twice the first brightness, the side viewing angle is greater than 30 degrees, and the preset azimuth angle is equal to 45 degrees, 135 degrees, 225 degrees or 315 degrees.

2. The liquid crystal display panel according to claim 1, wherein the first optical compensation layer is a +A film, and the second optical compensation layer is a +C film, The in-plane phase retardation R of the first optical compensation layer 01 satisfies the following equation: R 01 = n1 x R 0LC + mλ, The thickness phase retardation R of the second optical compensation layer th2 satisfies the following equation: R th2 = n2 x R 0LC + mλ, wherein R 0LC is the liquid crystal in-plane phase retardation, n1 is in the range of 1 / 4 to 3 / 4, n2 is in the range of -1 / π-1 / 6 to -1 / π+1 / 6, m is a positive integer, and λ is in the range of 380 nm to 780 nm.

3. The liquid crystal display panel according to claim 2, wherein The in-plane phase retardation R of the first optical compensation layer 01 is 125 ± 50 nm, the thickness phase retardation R th1 is 62.5 ± 25 nm (@ 550 nm), The in-plane phase retardation R of the second optical compensation layer 01 is in the range of 0 ± 25 nm, the thickness phase retardation R th2 is -100 ± 50 nm (@ 550 nm).

4. The liquid crystal display panel according to claim 2, wherein The total in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer 01 is 125 ± 50 nm, the total thickness phase retardation R th1 is -35 ± 50 nm (@ 550 nm).

5. The liquid crystal display panel according to claim 1, wherein the first optical compensation layer is a -C film, and the second optical compensation layer is a +B film, The in-plane phase retardation R of the first optical compensation layer 01 is 0 ± 25 nm, the thickness phase retardation R th1 is 110 ± 50 nm (@ 550 nm), an in-plane phase retardation R of the second optical compensation layer 01 in the range of 110 ± 50 nm, a thickness phase retardation R th1 in the range of 110 ± 50 nm (@ 550 nm).

6. The liquid crystal display panel according to claim 5, wherein The total in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer 01 is 110 ± 50 nm, the total thickness phase retardation R th1 is 0 ± 50 nm (@ 550 nm).

7. The liquid crystal display panel according to claim 1, wherein the first optical compensation layer is a -B film, and the second optical compensation layer is a +B film, The in-plane phase retardation R of the first optical compensation layer 01 is -220 ± 50 nm, the thickness phase retardation R th1 is 0 ± 25 nm (@ 550 nm), The in-plane phase retardation R of the second optical compensation layer 01 is in the range of 110 ± 50 nm, the thickness phase retardation R th1 is in the range of 0 ± 25 nm (@ 550 nm).

8. The liquid crystal display panel according to claim 7, wherein The total in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer 01 is -110 ± 50 nm, the total thickness phase retardation R th1 is 0 ± 50 nm (@ 550 nm). 9.The liquid crystal display panel of any one of claims 1-8, further comprising: an array substrate located on a side of the liquid crystal layer, an opposite substrate located on a side of the liquid crystal layer away from the array substrate, wherein the array substrate comprises gate lines extending along a first direction and data lines extending along a second direction, the first direction and the second direction intersecting, the array substrate further comprises pixel electrodes and common electrodes.

10. The liquid crystal display panel according to claim 9, wherein, the pixel electrodes are located on a side of the common electrodes close to the liquid crystal layer, and the pixel electrodes comprise first slits, an angle between the first slits and the first direction being less than 45 degrees.

11. The liquid crystal display panel according to claim 10, wherein the angle between the first slits and the first direction ranges from 5 degrees to 15 degrees. 12.The liquid crystal display panel of claim 10, further comprising: a first alignment film located on a side of the array substrate close to the liquid crystal layer; a second alignment film located on a side of the opposite substrate close to the liquid crystal layer; and a black matrix comprising a first portion and a second portion, wherein a normal projection of the first portion on the liquid crystal layer covers a normal projection of the gate lines on the liquid crystal layer, and a normal projection of the second portion on the liquid crystal layer covers a normal projection of the data lines on the liquid crystal layer. the liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second portion on the liquid crystal layer and a normal projection of an edge of the data lines on the liquid crystal layer ranges from 5.0 um to 6.5 um.

13. The liquid crystal display panel according to claim 12, wherein, the liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are optical alignment films, and a distance between a normal projection of an edge of the second portion on the liquid crystal layer and a normal projection of an edge of the data lines on the liquid crystal layer ranges from 1.0 um to 3.0 um.

14. The liquid crystal display panel of claim 12, wherein, ​ 15. The liquid crystal display panel of claim 12, wherein, The liquid crystal molecules are negative liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second portion on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 2.0 um to 3.0 um.

16. The liquid crystal display panel of claim 12, wherein, The liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are optical alignment films, and a distance between a normal projection of an edge of the second portion on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 1.0 um to 3.0 um.

17. The liquid crystal display panel of claim 9, wherein, The common electrode is located on a side of the pixel electrode close to the liquid crystal layer, and the common electrode comprises a second slit, and an angle between the second slit and the second direction is less than 45 degrees.

18. The liquid crystal display panel of claim 17, wherein, The angle between the second slit and the second direction ranges from 5 degrees to 15 degrees.

19. The liquid crystal display panel of claim 12, further comprising: a first alignment film located on a side of the array substrate close to the liquid crystal layer; a second alignment film located on a side of the counter substrate close to the liquid crystal layer; and a black matrix comprising a first portion and a second portion, wherein a normal projection of the first portion on the liquid crystal layer covers a normal projection of the gate line on the liquid crystal layer, and a normal projection of the second portion on the liquid crystal layer covers a normal projection of the data line on the liquid crystal layer.

20. The liquid crystal display panel of claim 19, wherein, The liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second portion on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 1.0 um to 3.0 um.

21. The liquid crystal display panel of claim 19, wherein, The liquid crystal molecules are positive liquid crystals, the first alignment film and the second alignment film are optical alignment films, and a distance between a normal projection of an edge of the second portion on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 0 um to 2.0 um.

22. The liquid crystal display panel of claim 19, wherein, The liquid crystal molecules are negative liquid crystals, the first alignment film and the second alignment film are rubbing alignment films, and a distance between a normal projection of an edge of the second portion on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 2.0 um to 3.0 um.

23. The liquid crystal display panel of claim 19, wherein, The liquid crystal molecules are negative liquid crystals, the first alignment film and the second alignment film are optical alignment films, and a distance between a normal projection of an edge of the second portion on the liquid crystal layer and a normal projection of an edge of the data line on the liquid crystal layer ranges from 0 um to 3.0 um.

24. The liquid crystal display panel of claim 19, further comprising: an additional electrode located on the counter substrate, wherein a normal projection of the additional electrode on the liquid crystal layer overlaps with a normal projection of the common electrode on the liquid crystal layer, The liquid crystal molecules are positive liquid crystals or negative liquid crystals, the first alignment film and the second alignment film are optical alignment films, and a distance between an edge of the second portion on the orthographic projection of the liquid crystal layer and an edge of the data line on the orthographic projection of the liquid crystal layer ranges from 0 um to 3.0 um.

25. A display device comprising the liquid crystal display panel according to any one of claims 1-24.

Images