Liquid crystal display panel and display device

Abstract

The invention discloses a liquid crystal display panel and a display device. The liquid crystal display panel includes: a liquid crystal layer including liquid crystal molecules; a first polarizer located on a first side of the liquid crystal layer and having a first light-transmitting axis; a second polarizer located on a second side of the liquid crystal layer and having a second light-transmitting axis; an optical compensation film between the first polarizer and the second polarizer; the optical axis of the liquid crystal molecules is perpendicular to the optical axis of the first optical compensation film or the optical axis of the second optical compensation film, under the preset azimuth angle, the dark-state light leakage brightness of the liquid crystal display panel under the positive view angle is first brightness, the dark-state light leakage brightness of the liquid crystal display panel under the view angle on one side is second brightness, and the second brightness is two times of the first brightness. The side view angle is larger than 30 degrees. Therefore, the liquid crystal display panel can greatly improve the problems of light leakage and color cast 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 technique

[0002] With the continuous development of display technology, liquid crystal display devices have occupied the dominant position in the display industry. Among them, liquid crystal display devices using Advanced Super Dimension Switch (ADS) technology have become the mainstream due to advantages such as wide viewing angles, fast response speeds, and high contrast ratios. In recent years, as TV products have continuously upgraded their specifications, the ADS display mode has gradually been upgraded 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 alignment methods of the alignment film also include rubbing alignment and optical alignment, etc. The pixel designs with the best transmittance corresponding to different display modes, liquid crystal types, and alignment methods are also different.

[0004] Summary of the invention

[0005] Embodiments of the present disclosure provide a liquid crystal display panel and a display device. When the azimuth angle is 45 degrees, the dark state light leakage brightness of the liquid crystal display panel at the front view angle is the first brightness, and the dark state light leakage brightness of the liquid crystal display panel at a side view angle is the second brightness. The second brightness is twice that of the first brightness, and the side view angle is greater than 30 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, enabling users to obtain better visual effects at larger side viewing angles.

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

[0007] For example, in the liquid crystal display panel provided in an embodiment of the present 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 retardation R of the first optical compensation layer 01 satisfies the following formula: R 01 = n1 × R 0LC + mλ,

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

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

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

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

[0013] For example, in the liquid crystal display panel provided in an embodiment of the present 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 01 is 0 ± 25 nm, and the thickness phase retardation R th1 is 110 ± 50 nm (@550 nm). The in-plane phase retardation R of the second optical compensation layer 01 has a value range of 110 ± 50 nm, and the thickness phase retardation R th1 has a value range of 110 ± 50 nm (@550 nm).

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

[0015] For example, in the liquid crystal display panel provided in an 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 01 is -220 ± 50 nm, the thickness phase retardation R th1 is 0 ± 25 nm (@550 nm), and the in-plane phase retardation R of the second optical compensation layer 01 has a value range of 110 ± 50 nm, and the thickness phase retardation R th1 has a value range of 0 ± 25 nm (@550 nm).

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

[0017] For example, the liquid crystal display panel provided in an embodiment of the present disclosure further includes: 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 includes gate lines extending in a first direction and data lines extending in a second direction, the first direction and the second direction intersect, and the array substrate further includes pixel electrodes and common electrodes.

[0018] For example, in the liquid crystal display panel provided in an 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 includes 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 in an embodiment of the present disclosure, the angle range between the first slit and the first direction is 5 degrees to 15 degrees.

[0020] For example, the liquid crystal display panel provided by an embodiment of the present disclosure further includes: 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 including a first part and a second part, where the orthographic projection of the first part on the liquid crystal layer covers the orthographic projection of the gate line on the liquid crystal layer, and the orthographic projection of the second part on the liquid crystal layer covers the orthographic 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 the value range of the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer is 5.0um to 6.5um.

[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 optical alignment films, and the value range of the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer is 1.0um to 3.0um.

[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 the value range of the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer is 2.0um to 3.0um.

[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 optical alignment films, and the value range of the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer is 1.0um to 3.0um.

[0025] For example, in the liquid crystal display panel provided by an embodiment of the present disclosure, the common electrode is located on one side of the pixel electrode close to the liquid crystal layer, and the common electrode includes a second slit, and the 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, the angle range between the second slit and the second direction is 5 degrees to 15 degrees.

[0027] For example, the liquid crystal display panel provided by an embodiment of the present disclosure further includes: 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 including a first part and a second part, where the orthographic projection of the first part on the liquid crystal layer covers the orthographic projection of the gate line on the liquid crystal layer, and the orthographic projection of the second part on the liquid crystal layer covers the orthographic projection of the data line on the liquid crystal layer.

[0028] 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 the value range of the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer is 1.0 um to 3.0 um.

[0029] 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 optical alignment films, and the value range of the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer is 0 um to 2.0 um.

[0030] 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 the value range of the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer is 2.0 um to 3.0 um.

[0031] 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 optical alignment films, and the value range of the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer is 0 um to 3.0 um.

[0032] For example, the liquid crystal display panel provided by an embodiment of the present disclosure further includes: an additional electrode located on the counter substrate, where the orthographic projection of the additional electrode on the liquid crystal layer overlaps with the orthographic 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 the value range of the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer is 0 um to 3.0 um.

[0033] At least one embodiment of the present disclosure further provides a display device, which includes the liquid crystal display panel described in any one of the above. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

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

[0042] FIG. 7 is a schematic diagram of the structure of another liquid crystal display panel provided by an embodiment of the present disclosure;

[0043] FIG. 8 is a partial plan view of an array substrate in a liquid crystal display panel provided by 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 provided by an embodiment of the present disclosure;

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

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

[0047] FIG. 12 is a partial plan view of an array substrate in another liquid crystal display panel provided by 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 provided by an embodiment of the present disclosure;

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

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

[0051] FIG. 16 is a schematic diagram of a display device provided by an embodiment of the present disclosure. Detailed Embodiments

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0053] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or items appearing before the term cover the elements or items listed after the term and their equivalents, without excluding other elements or items.

[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 large viewing angles, the upper and lower polarizers are not perpendicular, resulting in light leakage.

[0055] In this regard, embodiments of the present disclosure provide a liquid crystal display panel, which includes: a liquid crystal layer including liquid crystal molecules; a first polarizer located on a first side of the liquid crystal layer and having a first transmission axis; a second polarizer located on a second side of the liquid crystal layer and having a second transmission axis; an optical compensation film located between the first polarizer and the second polarizer; a positive projection of the optical axis of the liquid crystal molecules on the first polarizer is parallel to the first transmission axis or the second transmission axis, the optical compensation film includes 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 the optical axis of the first optical compensation film or the second optical compensation film, at a preset azimuth angle, the dark state light leakage brightness of the liquid crystal display panel at a front view angle is a first brightness, the dark state light leakage brightness of the liquid crystal display panel at a side view angle is a second brightness, the second brightness is twice that of the first brightness, the side view angle is greater than 30 degrees, and the preset azimuth angle is equal to 45, 135, 225 or 315 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, enabling users to obtain a better visual effect at a larger side viewing angle.

[0056] Embodiments of the present disclosure further provide a display device, which includes the above-mentioned liquid crystal display panel. Therefore, the display device can also greatly improve the light leakage problem and color shift problem at large viewing angles, enabling users to obtain a better visual effect at a larger side viewing angle.

[0057] Next, the liquid crystal display panel and the display device provided by embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

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

[0059] FIG. 2B is a comparison diagram of dark state light leakage of a liquid crystal display panel provided by an embodiment of the present disclosure. As shown in FIG. 2B, in the case where the azimuth angle is 45 degrees, the dark state light leakage brightness of this embodiment and the comparative example (i.e., the general liquid crystal display panel) at the front view angle is the first brightness B1, the dark state light leakage brightness of the comparative example at a side view angle of about 17 degrees is the second brightness B2, the second brightness B2 is twice the first brightness B1, and the dark state light leakage brightness of this embodiment at a side view angle of about 37 degrees is the second brightness B2. It can be seen that through the above optical compensation film, the liquid crystal display panel can still maintain low light leakage and color shift at a relatively large side view angle (greater than 30 degrees). Thus, the liquid crystal display panel can greatly improve the light leakage problem and color shift problem at a large view angle through the optical compensation film, so that users can obtain a better visual effect at a larger side view angle.

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

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

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

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

[0064] FIG. 3 is a schematic diagram of the azimuth angle and side viewing angle of a liquid crystal display panel provided by 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 forms a certain angle with the row direction (for example, the direction in which the gate lines extend) or 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. And the above-mentioned front viewing angle and side viewing angle are the angles 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, the embodiments of the present disclosure include but are not limited to this, and the second optical compensation layer may 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, and the in-plane phase retardation R of the first optical compensation layer 01 satisfies the following formula: R 01 =n1×R 0LC +mλ,

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

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

[0069] Thus, by combining the +A film and the +C film and making them meet the above parameters, the optical compensation film can enable the polarized light passing through the first polarizer and the liquid crystal layer to first undergo phase compensation through the +A film and the +C film, so that its polarization state changes to form a cross-Nicol relation with the second polarizer, thereby suppressing the dark-state light leakage phenomenon 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, enabling users to obtain better visual effects at larger side viewing angles. It should be noted that for a general liquid crystal display panel, when the side viewing angle is about 17 degrees, the dark-state light leakage brightness is twice the first brightness. Therefore, the liquid crystal display panel provided by the embodiments of the present disclosure greatly improves the light leakage problem and color shift problem at large viewing angles.

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

[0071] It should be noted that the in-plane phase retardation mentioned above refers to the in-plane retardation of light with a wavelength of λ in the corresponding film layer, and the thickness phase retardation mentioned above 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 "+C film" in this article are classified according to the refractive index anisotropy of each film layer. The materials through which light passes have refractive indices (nx, ny, nz) with respect to the x, y, and z axes respectively; if the material has the same refractive index along the x, y, and z axes, the material can be called isotropic; if the material has partially or completely different refractive indices, the material can be called anisotropic. When assuming that the thickness direction of the film layer is the z direction, one of the two planar 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 different refractive indices in one direction, the film layer is called a uniaxial film; when the film layer has different refractive indices in all three directions, the film layer is called a biaxial film.

[0072] In a uniaxial film, when the film layer has different refractive indices in the planar 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 nx = nz > ny as required by the formula, the film layer can be called an -A film.

[0073] Similarly, in a uniaxial film, when the film layer has different refractive indices 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 with all different in-plane and thickness-direction phase delays. 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 is 125 ± 50 nm, and the thickness phase delay R th1 is 62.5 ± 25 nm (@550 nm). The in-plane phase delay R of the second optical compensation layer 242 01 has a value range of 0 ± 25 nm, and the thickness phase delay R th2 is -100 ± 50 nm (@550 nm). By making 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 ranges, the optical compensation film can achieve a better phase compensation effect. It should be noted that the above 62.5 ± 25 nm (@550 nm) means that the phase delay for light with a wavelength of 550 nm is 62.5 ± 25 nm; the above -100 ± 50 nm (@550 nm) means that the phase delay for light with a wavelength of 550 nm is -100 ± 50 nm; the same applies to other similar limitations in the following text.

[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 is 125 ± 50 nm, and the combined thickness phase delay R th1 is -35 ± 50 nm (@550 nm).

[0077] FIG. 4 is a schematic diagram of a compensation path of a liquid crystal display panel provided by an embodiment of the present disclosure. As shown in FIG. 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 FIG. 4, and then passes through the +C film for compensation, and its polarization state moves from the middle point to the end point along the arc trajectory (the arc on the meridian) shown in FIG. 4, so as to become polarized light (outgoing light polarization) before passing through the second polarizer. In this state, the outgoing light polarization is in a cross-Nicol relationship with the second polarizer, so the light leakage in the dark state is suppressed.

[0078] In some examples, the first optical compensation layer 241 is a -C film, the second optical compensation layer 242 is a +B film, the in-plane phase delay R of the first optical compensation layer 01 is 0 ± 25 nm, and the thickness phase delay R th1 is 110 ± 50 nm (@550 nm), and the in-plane phase delay R of the second optical compensation layer01 has a value range of 110 ± 50 nm, and the thickness phase retardation R th1 has a value range of 110 ± 50 nm (@550 nm). 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 is changed to be in a cross-Nicol relation with the second polarizer, thereby suppressing the dark state light leakage phenomenon 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, enabling users to obtain a better visual effect at a larger side viewing angle.

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

[0080] FIG. 5 is a schematic diagram of a compensation path of another liquid crystal display panel provided by an embodiment of the present disclosure. As shown in FIG. 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 from the starting point to the middle point along the circular arc trajectory (the circular arc on the meridian) shown in FIG. 5, and then is compensated by the +B film, and its polarization state moves from the middle point to the end point along the circular arc trajectory shown in FIG. 5, so as to become polarized light (outgoing light polarization) before passing through the second polarizer. In this state, the outgoing light polarization is in a cross-Nicol relation with the second polarizer, so the light leakage in the dark state is suppressed.

[0081] In some examples, the first optical compensation layer 241 is a -B film, the second optical compensation layer 242 is a +B film, the in-plane phase retardation R of the first optical compensation layer 01 is -220 ± 50 nm, and the thickness phase retardation R th1 is 0 ± 25 nm (@550 nm), and the in-plane phase retardation R of the second optical compensation layer 01 has a value range of 110 ± 50 nm, and the thickness phase retardation R th1The value range of is 0 ± 25 nm (@550 nm). Thus, by combining the -B film and the +B film and making them meet the above parameters, the liquid crystal display panel can still maintain low light leakage and color shift at a relatively large side viewing angle (greater than 35 degrees). Therefore, the liquid crystal display panel can greatly improve the light leakage problem and color shift problem at a large viewing angle through the optical compensation film, enabling users to obtain a better visual effect at a larger side viewing angle.

[0082] In some examples, the in-plane retardation R of the first optical compensation layer 241 and the second optical compensation layer 242 01 is -110 ± 50 nm, and the 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 provided by an embodiment of the present disclosure. As shown in FIG. 6, the polarized light (incident light polarization) that has passed through the first polarizer and the 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 (outgoing light polarization) before passing through the second polarizer. In this state, the outgoing light polarization is in a cross-Nicol relationship with the second polarizer, so the light leakage in the dark state is suppressed.

[0084] FIG. 7 is a schematic structural diagram of another liquid crystal display panel provided by an embodiment of the present disclosure; FIG. 8 is a partial plan view of an array substrate in a liquid crystal display panel provided by an embodiment of the present disclosure; FIG. 9 is an overlapping schematic diagram of a data line and a black matrix in a liquid crystal display panel provided by 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 a counter substrate 290; the array substrate 100 is located on one side of the liquid crystal layer 230; the counter substrate 290 is located on the side of the liquid crystal layer 230 away from the array substrate 100.

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

[0087] As shown in FIGS. 7 and 8, the pixel electrodes 140 are located on the side of the common electrodes 150 close to the liquid crystal layer 230. 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 electrodes 150 to drive the liquid crystal molecules in the liquid crystal layer to deflect.

[0088] For example, the above-mentioned first direction may be the row direction of the liquid crystal display panel, and the above-mentioned second direction may be the column direction of the liquid crystal display panel.

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

[0090] In some examples, the angle range between the first slit 145 and the first direction is from 5 degrees to 15 degrees, for example, from 7 degrees to 11 degrees. Thus, while the liquid crystal display panel has a very high contrast ratio, by setting the above-mentioned slit angle, the liquid crystal display panel has a relatively low driving voltage for the liquid crystal.

[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; the second alignment film 260 is located on the side of the counter 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 value range of 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 is 5.0 um to 6.5 um.

[0094] Since both the first alignment film and the second alignment film are formed by the rubbing alignment process, and the rubbing direction is along the extension direction of the first slit or the second slit, the heights of the data line (e.g., ) and the pixel electrode (e.g., ) are different, there is a height step difference. Therefore, there are weak rubbing alignment regions on both sides of the data line, and the alignment of the liquid crystal molecules in this region is inconsistent, which will cause light leakage at the side viewing angle. By setting the value range of 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 be 5.0 um to 6.5 um, the liquid crystal display panel provided by the embodiments of the present disclosure can effectively avoid the light leakage problem in the weak rubbing alignment region, and can also avoid 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 value range of 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 is 1.0 um to 3.0 um. When the first alignment film and the second alignment film are fabricated by an optical alignment process, there is no such weak rubbing alignment area on both sides of the data line. Therefore, the second portion of the black matrix can be set narrower.

[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 value range of the distance D1 between the orthographic projection of the edge of the second portion 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 2.0 um to 3.0 um. Although both the first alignment film and the second alignment film are formed by a rubbing alignment process, since negative liquid crystals are used, the rubbing direction is perpendicular to the direction of the first slit or the second slit, resulting in a smaller weak rubbing alignment area on both sides of the data line. By setting the value range of 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 2.0 um to 3.0 um, the liquid crystal display panel provided by the embodiments of the present disclosure can effectively avoid the light leakage problem of the weak rubbing alignment area and also avoid the crosstalk problem between different color sub-pixels.

[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 value range of the distance between the orthographic projection of the edge of the second portion 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 1.0 um to 3.0 um. When the first alignment film and the second alignment film are fabricated by an optical alignment process, there is no such weak rubbing alignment area on both sides of the data line. Therefore, the second portion of the black matrix can be set narrower.

[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 the 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 materials 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, which are used to convert the light transmitted through the liquid crystal layer 230 into other colors, thereby achieving 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 by the embodiments of the present disclosure, the array substrate can adopt a 5Mask or 6Mask process flow, that is, 1ITO→Gate→HTM SD (SD + Active)→PVX→2ITO. 1ITO can be used to form the common electrode, 2ITO can be used to form the pixel electrode, there is no insulating layer between 1ITO and Gate, and a direct lap design is adopted. The bridging trace can be formed by using the SD or 2ITO layer.

[0106] FIGS. 10A - 10E are schematic diagrams of the steps of a method for manufacturing an array substrate provided by an embodiment of the present disclosure. As shown in FIG. 10A, a first electrode layer 1ITO is formed on the 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; as shown in FIG. 10E, a second electrode layer 2ITO is formed on the passivation layer PVX, and the second electrode layer 2ITO has slits.

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

[0108] FIGS. 11A-11E are schematic diagrams of steps of a method for manufacturing an array substrate provided by 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. C, 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, spacers PS are formed on a side of the R, G, and B color filters away from the black matrix BM. <0000 as-is (e.g.,

[0109] In some examples, the liquid crystal display panel may adopt a Dual Gate design, that is, two sub-pixel columns share one data line. In this case, after the array substrate and the counter substrate are aligned and laminated, the spacer PS may be located on the data line, that is, the orthographic projection of the spacer PS on the first substrate overlaps with the orthographic projection of the data line on the first substrate. In the overlapping area of the spacer and the data line, the data line may be designed with a local widening to form a base, and the double-layer metal bridging around may form a retaining wall, reducing the sliding range of the spacer PS, reducing the mura risk, and improving the display effect.

[0110] In some examples, after the array substrate and the counter substrate are aligned and laminated, the spacer PS may also be located on the common electrode line. The common electrode line is locally widened to form a base, which can also support the spacer PS and reduce the sliding range of the spacer PS. At the same time, the widening of the common electrode line also helps to improve the uniformity of the common voltage of the entire panel. And 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 is beneficial to improving the pixel charging rate.

[0111] FIG. 12 is a partial plan view of an array substrate in another liquid crystal display panel provided by an embodiment of the present disclosure; FIG. 13 is an overlapping view of a data line and a black matrix in another liquid crystal display panel provided by 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. At this time, 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 to drive 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 achieve the HADS mode.

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

[0114] In some examples, the liquid crystal display panel 200 further includes 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 counter substrate 290 close to the liquid crystal layer 230. For specific details, refer to the relevant description in FIG. 7, which will not be elaborated here.

[0115] In some examples, as shown in FIG. 13, the liquid crystal display panel 200 further includes a black matrix 270, which includes a first portion 272 and a second portion 274; the positive projection of the first portion 272 on the liquid crystal layer 230 covers the positive projection of the gate line 120 on the liquid crystal layer 230, and the positive projection of the second portion 274 on the liquid crystal layer 230 covers the positive 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 value range of the distance between the positive projection of the edge of the second portion 174 on the liquid crystal layer 230 and the positive projection of the edge of the data line 130 on the liquid crystal layer 230 is 1.0 um to 3.0 um. At this time, there is no light leakage area on both sides of the data line. Therefore, the liquid crystal display panel can effectively avoid the light leakage problem in the weak rubbing alignment area by setting the value range of the distance between the positive projection of the edge of the second portion of the black matrix on the liquid crystal layer and the positive projection of the edge of the data line on the liquid crystal layer to be 1.0 um to 3.0 um, and can also 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 value range of the distance between the positive projection of the edge of the second portion 174 on the liquid crystal layer 230 and the positive projection of the edge of the data line 130 on the liquid crystal layer 230 is 0 um to 2.0 um. When the first alignment film and the second alignment film are fabricated by an optical alignment process, there is no such weak rubbing alignment area on both sides of the data line. Therefore, the second portion 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 value range of the distance between the positive projection of the edge of the second portion 174 on the liquid crystal layer 230 and the positive projection of the edge of the data line 130 on the liquid crystal layer 230 is 2.0 um to 3.0 um. At this time, there is a light leakage problem on both sides of the data line. Therefore, it is necessary to set the value range of the distance between the positive projection of the edge of the second portion 174 on the liquid crystal layer 230 and the positive projection of the edge of the data line 130 on the liquid crystal layer 230 to be 2.0 um to 3.0 um.

[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 the value range of the distance between the projection of the edge of the second part 174 on the liquid crystal layer 230 and the projection of the edge of the data line 130 on the liquid crystal layer 230 in the orthographic projection is 0 um to 3.0 um.

[0120] FIG. 14 is a schematic structural diagram of another liquid crystal display panel provided by an embodiment of the present disclosure; FIG. 15 is an overlapping schematic diagram of a data line and a black matrix in another liquid crystal display panel provided by an embodiment of the present disclosure. As shown in FIG. 14, the liquid crystal display panel 200 further includes an additional electrode 160 located on the counter 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 counter substrate can be formed between the additional electrode and the common electrode; the electric field in the vertical direction can exert a force in the vertical direction on the ions to stabilize the ions, reduce the probability of horizontal migration of the ions, and further avoid the change of the electric field between the pixel electrode and the common electrode due to ion migration and aggregation, 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 whole-surface electrode. Of course, the 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 counter 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 one 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, the embodiments of the present disclosure include but are not limited to this.

[0124] For example, the materials 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 counter substrate 290 includes a second substrate 291, and the black matrix 270 is disposed on the second substrate 291.

[0126] In some examples, as shown in FIG. 14, the counter substrate 290 further includes color filters 275 located between the black matrices 270 for converting the light transmitted through the liquid crystal layer 230 into other colors, thereby achieving 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 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.

[0129] In some examples, as shown in FIG. 15, the liquid crystal molecules are positive liquid crystals or negative liquid crystals, the first alignment film 250 and the second alignment film 260 are optical alignment films, and the value range of the distance between the orthographic projection of the edge of the second portion 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 0 um to 3.0 um.

[0130] At least one embodiment of the present disclosure further 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 includes the above-mentioned liquid crystal display panel 200. Thus, the display device can also greatly improve the light leakage problem and color shift problem at large viewing angles, enabling users to obtain better visual effects at larger side viewing angles.

[0131] For example, the display device can be an electronic product with a display function such as a television, a monitor, an electronic picture frame, an electronic photo frame, a navigator, a notebook computer, a tablet computer, a smart phone, etc.

[0132] The following points need to be noted:

[0133] (1) In the accompanying 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 refer to the general design.

[0134] (2) Without conflict, the features in the same embodiment and different embodiments of the present disclosure can be combined with each other.

[0135] The above description is only an exemplary implementation manner of the present disclosure, rather than being used to limit the protection scope of the present disclosure. The protection scope of the present disclosure 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 transmission axis; a second polarizer, located on a second side of the liquid crystal layer and having a second transmission axis; an optical compensation film, located between the first polarizer and the second polarizer, The optical compensation film includes a first optical compensation layer and a second optical compensation layer, wherein 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. When the azimuth angle is a preset azimuth angle, the dark state leakage brightness of the liquid crystal display panel at a positive viewing angle is a first brightness, and the dark state 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, 135, 225 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 formula: R 01 =n1×R 0LC +mλ, The thickness phase retardation R of the second optical compensation layer th2 Satisfies the following formula: R th2 =n2×R 0LC +mλ, Among them, R 0LC is the phase retardation in the liquid crystal plane, 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.

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±50nm, and the thickness phase retardation R th1 62.5±25nm(@550nm), The in-plane phase retardation R of the second optical compensation layer 01 The value range is 0±25nm, and the thickness phase delay R th2 -100±50nm(@550nm).

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

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 0±25nm, thickness phase retardation R th1 110±50nm(@550nm), The in-plane phase retardation R of the second optical compensation layer 01 The value range is 110±50nm, and the thickness phase delay R th1 The value range is 110±50nm (@550nm).

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

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 -220±50nm, thickness phase retardation R th1 0±25nm(@550nm), The in-plane phase retardation R of the second optical compensation layer 01 The value range is 110±50nm, and the thickness phase delay R th1 The value range is 0±25nm (@550nm).

8. The liquid crystal display panel according to claim 7, wherein: The comprehensive in-plane phase retardation R of the first optical compensation layer and the second optical compensation layer 01 -110±50nm, comprehensive thickness phase delay R th1 0±50nm(@550nm).

9. The liquid crystal display panel according to any one of claims 1 to 8, further comprising: an array substrate, located on one side of the liquid crystal layer, an opposing substrate, located on a side of the liquid crystal layer away from the array substrate, The array substrate includes gate lines extending along a first direction and data lines extending along a second direction, and the first direction and the second direction intersect. The array substrate further includes a pixel electrode and a common electrode.

10. The liquid crystal display panel according to claim 9, wherein: The pixel electrode is located on a side of the common electrode close to the liquid crystal layer. The pixel electrode includes a first slit. An angle between the first slit and the first direction is less than 45 degrees.

11. The liquid crystal display panel according to claim 10, wherein: An angle between the first slit and the first direction is in a range of 5 degrees to 15 degrees.

12. The liquid crystal display panel according to 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 counter substrate close to the liquid crystal layer; as well as The black matrix includes a first part and a second part. The orthographic projection of the first part on the liquid crystal layer covers the orthographic projection of the gate line on the liquid crystal layer, and the orthographic projection of the second part on the liquid crystal layer covers the orthographic projection of the data line on the liquid crystal layer.

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 rubbed alignment films, and the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer ranges from 5.0um to 6.5um.

14. 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 the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer ranges from 1.0um to 3.0um.

15. The liquid crystal display panel according to 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 the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer ranges from 2.0um to 3.0um.

16. The liquid crystal display panel according to claim 12, wherein: The liquid crystal molecules are negative liquid crystals, the first alignment film and the second alignment film are optical alignment films, and the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer ranges from 1.0um to 3.0um.

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

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

19. The liquid crystal display panel according to 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; as well as The black matrix includes a first part and a second part. The orthographic projection of the first part on the liquid crystal layer covers the orthographic projection of the gate line on the liquid crystal layer, and the orthographic projection of the second part on the liquid crystal layer covers the orthographic projection of the data line on the liquid crystal layer.

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

21. The liquid crystal display panel according to 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 the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer ranges from 0um to 2.0um.

22. The liquid crystal display panel according to 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 the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer ranges from 2.0um to 3.0um.

23. The liquid crystal display panel according to 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 the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer ranges from 0um to 3.0um.

24. The liquid crystal display panel according to claim 19, further comprising: an additional electrode, located on the counter substrate, The orthographic projection of the additional electrode on the liquid crystal layer overlaps with the orthographic 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 the distance between the orthographic projection of the edge of the second part on the liquid crystal layer and the orthographic projection of the edge of the data line on the liquid crystal layer ranges from 0um to 3.0um.

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

Images