Display panel and display device

Abstract

A display panel and display device are disclosed. The display panel includes: a first polarizer, a first liquid crystal panel, a second polarizer, a third polarizer, a second liquid crystal panel, and a fourth polarizer stacked sequentially; wherein at least one of the first polarizer, the second polarizer, the third polarizer, and the fourth polarizer is a polarizer having an optical compensation layer; the haze of the first polarizer is less than that of the second polarizer, and the haze of the third polarizer is greater than that of the fourth polarizer; the optical axis direction of the first polarizer is parallel to the optical axis direction of the liquid crystal molecules of one of the first liquid crystal panel and the second liquid crystal panel, the optical axis direction of the second polarizer is parallel to the optical axis direction of the liquid crystal molecules of the other of the first liquid crystal panel and the second liquid crystal panel, the optical axis direction of the third polarizer is parallel to the optical axis direction of the second polarizer, and the optical axis direction of the fourth polarizer is parallel to the optical axis direction of the first polarizer.

Description

Technical Field

[0001] This disclosure relates to, but is not limited to, the field of display technology, and in particular to a display panel and a display device. Background Technology

[0002] Liquid crystal display (LCD) panels have been rapidly developed in recent years due to their small size, low power consumption, and lack of radiation. Dual-layer display devices typically consist of two stacked liquid crystal panels. However, due to limitations in pixel design, material scattering, or manufacturing processes, current dual-layer display devices suffer from significant loss of actual contrast, color shift at large viewing angles, and rainbow effects. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0004] On one hand, embodiments of this disclosure provide a display panel, including: a first polarizer, a first liquid crystal panel, a second polarizer, a third polarizer, a second liquid crystal panel, and a fourth polarizer stacked sequentially; wherein,

[0005] At least one of the first polarizer, the second polarizer, the third polarizer, and the fourth polarizer is a polarizer with an optical compensation layer;

[0006] The haze of the first polarizer is less than that of the second polarizer, and the haze of the third polarizer is greater than that of the fourth polarizer.

[0007] The optical axis of the first polarizer is parallel to the optical axis of the liquid crystal molecules in one of the first and second liquid crystal panels. The optical axis of the second polarizer is parallel to the optical axis of the liquid crystal molecules in the other of the first and second liquid crystal panels. The optical axis of the third polarizer is parallel to the optical axis of the second polarizer. The optical axis of the fourth polarizer is parallel to the optical axis of the first polarizer.

[0008] On the other hand, this disclosure also provides a display device, including: the display panel described in the above embodiments, wherein the first liquid crystal panel includes: a first array substrate and a first opposing substrate disposed opposite to each other, and a first liquid crystal layer disposed between the first array substrate and the first opposing substrate; the second liquid crystal panel includes: a second array substrate and a second opposing substrate disposed opposite to each other, and a second liquid crystal layer disposed between the second array substrate and the second opposing substrate.

[0009] Other features and advantages of this disclosure will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the disclosure. Other advantages of this disclosure may be realized and obtained by means of the methods described in the description and the accompanying drawings.

[0010] After reading and understanding the accompanying diagrams and detailed descriptions, the other aspects can be understood. Attached Figure Description

[0011] The accompanying drawings are provided to illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure, but do not constitute a limitation on the technical solutions of this disclosure. The shape and size of each component in the drawings do not reflect actual proportions and are only intended to illustrate the content of this disclosure.

[0012] Figure 1 This is a schematic diagram of a first structure of a display panel in an exemplary embodiment of the present disclosure;

[0013] Figure 2 This is a schematic diagram of the structure of the polarizer in an exemplary embodiment of this disclosure;

[0014] Figure 3 This is a schematic diagram of a second structure of the display panel in an exemplary embodiment of the present disclosure;

[0015] Figure 4 This is a schematic diagram of a third structure of the display panel in an exemplary embodiment of this disclosure;

[0016] Figure 5A This is an illustration of the improved effect of viewing characters in a red background.

[0017] Figure 5B This is an illustration of the improved effect of viewing characters in a green background.

[0018] Figure 5C This is an illustration of the improved effect of viewing characters in a blue background.

[0019] Figure 6 This is a schematic diagram showing the contrast result of the display panel in an exemplary embodiment of this disclosure;

[0020] Figure 7 This is a schematic diagram of the structure of the display device in an exemplary embodiment of the present disclosure. Detailed Implementation

[0021] This document describes several embodiments, but these descriptions are exemplary and not limiting. Many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the accompanying drawings and discussed in exemplary embodiments, many other combinations of the disclosed features are possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or substitute for, any feature or element of any other embodiment.

[0022] In describing representative embodiments, the specification may have presented a method or process as a specific sequence of steps. However, the method or process should not be limited to a specific order of steps to the extent that it is independent of this specific order. Other orders of steps are possible, as will be understood by those skilled in the art. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Furthermore, the claims relating to the method or process should not be limited to the steps performed in the order written, and those skilled in the art will readily understand that these orders may be varied and still remain within the spirit and scope of the embodiments disclosed herein.

[0023] In the accompanying drawings, the size of each component, the thickness of a layer, or the area are sometimes exaggerated for clarity. Therefore, this disclosure is not necessarily limited to these dimensions, and the shape and size of each part in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate ideal examples, and this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0024] In the exemplary embodiments disclosed herein, ordinal numbers such as "first," "second," and "third" are provided to avoid confusion of constituent elements, rather than to limit in terms of quantity.

[0025] In the exemplary embodiments of this disclosure, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationship, are used to describe the positional relationship of constituent elements with reference to the accompanying drawings. This is solely for the purpose of facilitating the description of this specification and simplifying the description, and is not intended to indicate or imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationship of the constituent elements may be appropriately changed depending on the direction in which each constituent element is described. Therefore, the description is not limited to the terms used in the specification and may be appropriately replaced as appropriate.

[0026] In the exemplary embodiments disclosed herein, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the meaning of the above terms in this disclosure as appropriate.

[0027] In exemplary embodiments of this disclosure, "electrical connection" includes the case where constituent elements are connected together by an element having some electrical function. There are no particular limitations on the "electrical function" as long as it enables the transmission and reception of electrical signals between the connected constituent elements. The "electrical function" can be, for example, an electrode or wiring, a switching element such as a transistor, or other functional elements such as a resistor, inductor, or capacitor.

[0028] In exemplary embodiments of this disclosure, a transistor is a device that includes at least three terminals: a gate electrode (gate or control electrode), a drain electrode (drain electrode terminal, drain region, or drain electrode), and a source electrode (source electrode terminal, source region, or source electrode). The transistor has a channel region between the drain electrode and the source electrode, and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to the region through which current primarily flows.

[0029] In exemplary embodiments of this disclosure, to distinguish the two terminals of a transistor other than the gate electrode (gate or control electrode), one terminal is directly described as the first terminal and the other as the second terminal. The first terminal can be the drain electrode and the second terminal can be the source electrode, or vice versa. In cases where transistors with opposite polarities are used or where the current direction changes during circuit operation, the functions of the "source electrode" and "drain electrode" are sometimes interchanged. Therefore, in this specification, the "source electrode" and "drain electrode" can be interchanged.

[0030] In the exemplary embodiments of this disclosure, the transistor can be a thin film transistor (TFT), a field effect transistor (FET), or other devices with similar characteristics. For example, the thin film transistor can be an oxide TFT or a low-temperature poly-silicon TFT (LTPS TFT), etc. This disclosure does not limit the scope of the embodiment.

[0031] In the exemplary embodiments of this disclosure, "parallel" refers to a state in which the angle formed by two straight lines is greater than or equal to -10° and less than 10°, and therefore also includes a state in which the angle is greater than or equal to -5° and less than 5°. In addition, "perpendicular" refers to a state in which the angle formed by two straight lines is greater than or equal to 80° and less than 100°, and therefore also includes a state in which the angle is greater than or equal to 85° and less than 95°.

[0032] In exemplary embodiments of this disclosure, "about" means a value that is not strictly limited and allows for process and measurement errors.

[0033] In the exemplary embodiments of this disclosure, the first direction DR1 can refer to the row direction, the second direction DR2 can refer to the column direction, and the third direction DR3 can refer to a direction perpendicular to the plane of the display panel or the thickness direction of the display panel, etc. The first direction DR1 intersects with the second direction DR2, and the first direction DR1 intersects with the third direction DR3. For example, the first direction DR1 and the second direction DR2 can be perpendicular to each other, and the first direction DR1 and the third direction DR3 can be perpendicular to each other.

[0034] In the exemplary embodiments of this disclosure, haze is one of the important optical properties of thin film articles. Haze reflects the ability of a thin film to scatter visible light. Haze (H) can be divided into surface haze (Hs) and internal haze (Hi).

[0035] In exemplary embodiments of this disclosure, the surface treatment of the polarizer may include: haze treatment, or anti-glare (AG) treatment, etc.

[0036] The main structure of an LCD includes a thin film transistor array (TFT) substrate and a counter substrate. Liquid crystal (LC) molecules fill the space between the array substrate and the counter substrate. By controlling the common electrode and pixel electrode, an electric field is formed to drive the deflection of the liquid crystal, thus achieving grayscale display. BD Cell display technology uses two liquid crystal panels stacked together to form a dual-cell display product. It employs local dimming technology, which divides the liquid crystal panel into millions of individual areas, enabling finer brightness adjustment within the sub-millimeter range. As shown in the following formula (1), according to the definition of contrast ratio, the contrast ratio (CR) of a BD Cell product is the L255 (bright state) brightness of the BD Cell product divided by the L0 (dark state) brightness of the BD Cell product. That is, the contrast ratio of a BD Cell product is equal to the contrast ratio of the main display panel (Main Cell) multiplied by the contrast ratio of the sub display panel (Sub Cell). For example, the measured contrast ratio of a single-layer ADS (Advanced Hyper-Depth Conversion) LCD panel is generally between 1000 and 2000. Therefore, the theoretical contrast ratio of a BD Cell could reach over one million. However, currently manufactured BD Cell products suffer from significant contrast loss, with actual tests showing contrast ratios ranging from tens of thousands to hundreds of thousands (below 300,000), a large discrepancy from the theoretical value (over one million). For instance, taking a 31.5-inch UHD (Ultra High Definition) BD Cell product as an example, the contrast ratios of the Main Cell and SubCell can be 1000:1 and 1700:1 respectively. However, the actual tested contrast ratio of the BD Cell product after lamination is only 191,000, approximately 89% lower than the theoretical value.

[0037]

[0038] In formula (1), CR represents the contrast ratio of the dual-layer display product, and Br L255 Indicates the L255 brightness of the dual-layer display product. L0 Indicates the L0 brightness of a dual-layer display product, Br BLU Tr represents the brightness of the backlight unit (BLU). Sub-L255 Indicates the L255 transmittance of the sub-display panel, Tr Sub-L0 Indicates the L0 transmittance of the sub-display panel, Tr Main-L255 Indicates the L255 transmittance of the main display panel, Tr Main-L0 This indicates the L0 transmittance of the main display panel.

[0039] Furthermore, while BD Cell products generally offer an 89° viewing angle horizontally and vertically, as the viewing angle increases, image distortion gradually appears, manifesting as color shift and resulting in a decrease in display quality. This hinders the product's promotion and application in fields such as monitors and medical devices. Because BD Cell products are constructed by bonding Main Cell and Sub Cell, light diffraction after passing through the periodic pixel arrangement can cause rainbow-like patterns.

[0040] Therefore, achieving a million-contrast ratio in BD Cells while resolving issues such as character shift and rainbow patterns at high viewing angles is of paramount importance.

[0041] This disclosure provides a display panel. Figure 1 This is a schematic diagram of a first structure of a display panel in an exemplary embodiment of the present disclosure, as shown below. Figure 1 As shown, in a direction perpendicular to the display panel, the display panel may include: a first polarizer 11, a first liquid crystal panel 12, a second polarizer 13, a third polarizer 14, a second liquid crystal panel 15, and a fourth polarizer 16 stacked sequentially; wherein, at least one of the first polarizer 11, the second polarizer 13, the third polarizer 14, and the fourth polarizer 16 is a polarizer with an optical compensation layer; the haze of the first polarizer 11 is less than that of the second polarizer 13, and the haze of the third polarizer 14 is greater than that of the fourth polarizer; the optical axis direction of the first polarizer 11 is parallel to the optical axis direction of the liquid crystal molecules of one of the first liquid crystal panels 12 and the second liquid crystal panels 15, the optical axis direction of the second polarizer 13 is parallel to the optical axis direction of the liquid crystal molecules of the other of the first liquid crystal panels 12 and the second liquid crystal panels 15, the optical axis direction of the third polarizer 14 is parallel to the optical axis direction of the second polarizer 13, and the optical axis direction of the fourth polarizer 16 is parallel to the optical axis direction of the first polarizer 11.

[0042] Thus, in the display panel provided in this embodiment, by employing a polarizer with an optical compensation layer, a polarizer treated with haze, and matching the optical axis direction of the polarizer with the optical axis direction of the liquid crystal molecules, it is possible to reduce dark-state light leakage, reduce the dark-state brightness of the display panel, improve the contrast of the display panel, and alleviate the color shift problem at large viewing angles. Furthermore, it is possible to change the collimation of the light path, thereby suppressing the rainbow effect problem.

[0043] In one exemplary embodiment, the haze of the first polarizer is greater than that of the fourth polarizer. For example, the haze value of the first polarizer may be approximately 55%, and the haze value of the fourth polarizer may be approximately 40% or 42%. This disclosure does not limit the scope of the embodiments.

[0044] In one exemplary embodiment, the haze of the second polarizer and the haze of the third polarizer are equal. For example, the haze of the second polarizer may be approximately 80%, and the haze of the third polarizer may be approximately 80%. This disclosure does not limit the scope of the embodiments.

[0045] In one exemplary embodiment, the display panel may satisfy any one or more of the following conditions: the ratio between the haze of the first polarizer and the haze of the second polarizer may be approximately 0.6 to 0.7; the ratio between the haze of the first polarizer and the haze of the third polarizer may be approximately 0.6 to 0.7; the ratio between the haze of the first polarizer and the haze of the fourth polarizer may be approximately 1.25 to 1.4; the ratio between the haze of the second polarizer and the haze of the third polarizer may be approximately 0.95 to 1.05; the ratio between the haze of the second polarizer and the haze of the fourth polarizer may be approximately 1.8 to 2; and the ratio between the haze of the third polarizer and the haze of the fourth polarizer may be approximately 1.8 to 2. Here, the embodiments of this disclosure do not limit this.

[0046] For example, the ratio between the haze of the first polarizer and the haze of the second polarizer can be, but is not limited to, 0.6, 0.61, 0.62, 0.63, 0.64, 0.65, 0.67, 0.68, 0.69, or 0.7. For instance, if the ratio between the haze of the first polarizer and the haze of the second polarizer is approximately 0.69, the haze of the first polarizer can be approximately 55%, and the haze of the second polarizer can be approximately 80%. This disclosure does not limit the specific values ​​of the polarizers.

[0047] For example, the ratio between the haze of the first polarizer and the haze of the third polarizer can be, but is not limited to, 0.6, 0.61, 0.62, 0.63, 0.64, 0.65, 0.67, 0.68, 0.69, or 0.7. For instance, if the ratio of the haze of the first polarizer to the haze of the third polarizer is approximately between 0.68 and 0.69, the haze of the first polarizer can be approximately 55%, and the haze of the third polarizer can be approximately 80%. This disclosure does not limit the specific ratio.

[0048] For example, the ratio between the haze of the first polarizer and the haze of the fourth polarizer can be, but is not limited to, 1.25, 1.26, 1.27, 1.28, 1.29, 1.3, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1.37, 1.38, 1.39, or 1.4. For instance, if the ratio between the haze of the first polarizer and the haze of the fourth polarizer is approximately 1.31, the haze of the first polarizer can be approximately 55%, and the haze of the fourth polarizer can be approximately 42%. Alternatively, if the ratio between the haze of the first polarizer and the haze of the fourth polarizer is approximately 1.38, the haze of the first polarizer can be approximately 55%, and the haze of the fourth polarizer can be approximately 40%. This disclosure does not limit the specific values ​​of these ratios.

[0049] For example, the ratio between the haze of the second polarizer and the haze of the third polarizer can be, but is not limited to, 0.95, 0.96, 0.97, 0.98, 0.99, 1, 1.01, 1.02, 1.03, 1.04, or 1.05. For instance, taking a ratio of approximately 1 between the haze of the second polarizer and the haze of the third polarizer as an example, the haze of the second polarizer can be approximately 80%, and the haze of the third polarizer can also be approximately 80%. This disclosure does not limit the specific values ​​of both polarizers.

[0050] For example, the ratio between the haze of the second polarizer and the haze of the fourth polarizer can be, but is not limited to, 1.8, 1.81, 1.82, 1.83, 1.84, 1.85, 1.86, 1.87, 1.88, 1.89, 1.9, 1.91, 1.92, 1.93, 1.94, 1.95, 1.96, 1.97, 1.98, 1.99, or 2. For instance, if the ratio between the haze of the second polarizer and the haze of the fourth polarizer is approximately 2, the haze of the second polarizer can be approximately 80%, and the haze of the fourth polarizer can be approximately 40%. Alternatively, if the ratio between the haze of the second polarizer and the haze of the fourth polarizer is approximately 1.9, the haze of the second polarizer can be approximately 80%, and the haze of the fourth polarizer can be approximately 42%. This disclosure does not limit the specific values ​​of these ratios.

[0051] For example, the ratio between the haze of the third polarizer and the haze of the fourth polarizer can be, but is not limited to, 1.8, 1.81, 1.82, 1.83, 1.84, 1.85, 1.86, 1.87, 1.88, 1.89, 1.9, 1.91, 1.92, 1.93, 1.94, 1.95, 1.96, 1.97, 1.98, 1.99, or 2. For instance, if the ratio between the haze of the third polarizer and the haze of the fourth polarizer is approximately 2, the haze of the third polarizer can be approximately 80%, and the haze of the fourth polarizer can be approximately 40%. Alternatively, if the ratio between the haze of the third polarizer and the haze of the fourth polarizer is approximately 1.9, the haze of the third polarizer can be approximately 80%, and the haze of the fourth polarizer can be approximately 42%. This disclosure does not limit the specific values ​​of these ratios.

[0052] In one exemplary embodiment, the display panel may satisfy any one or more of the following conditions: the haze of the first polarizer may be about 45% to 65%; the haze of the second polarizer may be about 70% to 90%; the haze of the third polarizer may be about 70% to 90%; and the haze of the fourth polarizer may be about 30% to 50%. Here, the embodiments disclosed herein do not limit this.

[0053] For example, the haze of the first polarizer may include, but is not limited to, 45%, 50%, 55%, 60%, or 65%. For instance, the haze of the first polarizer may be approximately 55%. This disclosure does not limit this aspect. The haze of the first polarizer may refer to the internal haze of the first polarizer, such as dispersed particles within the pressure-sensitive adhesive in the haze layer of the first polarizer. Thus, since the first polarizer is located on the outer surface of the first display liquid crystal panel, the matte finish of the display panel can be reduced, improving the user experience.

[0054] For example, the haze of the second polarizer may include, but is not limited to, 70%, 75%, 80%, 85%, or 90%. For instance, the haze of the second polarizer may be approximately 80%. This disclosure does not limit this aspect.

[0055] For example, the haze of the third polarizer may include, but is not limited to, 70%, 75%, 80%, 85%, or 90%. For instance, the haze of the third polarizer may be approximately 80%. This disclosure does not limit this aspect.

[0056] For example, the haze of the fourth polarizer may include, but is not limited to, 30%, 35%, 40%, 41%, 42%, 43%, 44%, 45%, or 50%. For instance, the haze of the fourth polarizer may be 40% or 42%. This disclosure does not limit the specific amount of haze.

[0057] In one exemplary embodiment, the display panel may satisfy any one or more of the following conditions: the haze of the first polarizer may be approximately 55%; the haze of the second polarizer may be approximately 80%; the haze of the third polarizer may be approximately 80%; and the haze of the fourth polarizer may be approximately 40% or 42%. This disclosure does not limit the scope of the invention.

[0058] In one exemplary embodiment, such as Figure 2 As shown, in the direction perpendicular to the display panel, the polarizer with an optical compensation layer includes: a protective layer 21, a first support layer 22, a polarizing layer 23, a second support layer 24, an optical compensation layer 25, an adhesive layer 26, and a release layer 27 stacked sequentially.

[0059] In one exemplary embodiment, the polarizing layer in the polarizer is responsible for polarization. For example, the polarizing layer may be formed using, but is not limited to, a polyvinyl alcohol (PVA) material. This disclosure does not limit the scope of the embodiment.

[0060] In one exemplary embodiment, the optical compensation layer 25 may include one compensation layer or two compensation layers. For example, the single compensation layer may be a Z-type compensation layer. For example, the two compensation layers may include a stacked +B-type compensation layer and a -B-type compensation layer, or a stacked +A-type compensation layer and a +C-type compensation layer. Here, the embodiments disclosed herein do not limit the scope of the invention.

[0061] In one exemplary embodiment, the in-plane optical path difference compensation value RoZ of the Z-type compensation layer can be approximately 220 nm ≤ RoZ ≤ 320 nm; the optical path difference compensation value RthZ in the thickness direction of the Z-type compensation layer can be 0 nm ≤ RoZ ≤ 1 nm. For example, the in-plane optical path difference compensation value RoZ of the Z-type compensation layer can be approximately 270 nm, and the optical path difference compensation value RthZ in the thickness direction of the Z-type compensation layer can be approximately 0.5 nm. This embodiment of the present disclosure does not limit these aspects.

[0062] In one exemplary embodiment, the in-plane optical path difference compensation value Ro+B of the +B type compensation layer ranges from 14nm to 34nm; the optical path difference compensation value Rth+B in the thickness direction of the +B type compensation layer ranges from -100nm to -75nm; the in-plane optical path difference compensation value Ro-B of the -B type compensation layer ranges from 106nm to 126nm; and the optical path difference compensation value Rth-B in the thickness direction of the -B type compensation layer ranges from 71nm to 91nm. For example, the in-plane optical path difference compensation value Ro+B of the +B type compensation layer can be approximately 27nm; the optical path difference compensation value Rth+B in the thickness direction of the +B type compensation layer can be approximately -87nm; the in-plane optical path difference compensation value Ro-B of the -B type compensation layer can be approximately 116nm; and the optical path difference compensation value Rth-B in the thickness direction of the -B type compensation layer can be approximately 81nm. This disclosure does not limit these specific values.

[0063] In one exemplary embodiment, the in-plane optical path difference compensation value Ro+A of the +A type compensation layer ranges from 115nm to 135nm; the optical path difference compensation value Rth+A in the thickness direction of the +A type compensation layer ranges from 52nm to 72nm; the in-plane optical path difference compensation value Ro+C of the +C type compensation layer ranges from 0nm to 5nm; and the optical path difference compensation value Rth+C in the thickness direction of the +C type compensation layer ranges from -107nm to -67nm. For example, the in-plane optical path difference compensation value Ro+A of the +A type compensation layer can be approximately 125nm; the optical path difference compensation value Rth+A in the thickness direction of the +A type compensation layer can be approximately 62nm; the in-plane optical path difference compensation value Ro+C of the +C type compensation layer can be approximately 0nm; and the optical path difference compensation value Rth+C in the thickness direction of the +C type compensation layer can be approximately -97nm. For example, the in-plane optical path difference compensation value Ro+A of the +A type compensation layer can be approximately 125 nm; the optical path difference compensation value Rth+A in the thickness direction of the +A type compensation layer can be approximately 62 nm; the in-plane optical path difference compensation value Ro+C of the +C type compensation layer can be approximately 0 nm; and the optical path difference compensation value Rth+C in the thickness direction of the +C type compensation layer can be approximately -78 nm. This disclosure does not limit these specific values.

[0064] In an exemplary embodiment, the polarizing layer is extremely prone to hydrolysis. In order to ensure the characteristics of the polarizing layer, support layers with high light transmittance, good water resistance and certain mechanical strength can be provided on both sides of the polarizing layer for protection. That is, the polarizing layer 23 can be protected by the first support layer 22 and the second support layer 24 in the polarizing film.

[0065] In one exemplary embodiment, any one or more of the first support layer 22 and the second support layer 24 may be formed from, but is not limited to, materials such as: tri-cellulose acetate (TAC), polyethylene terephthalate (PET), acrylic, and cyclic olefin polymers (COP). For example, TAC may be no-retardation cellulose acetate (NRT). This disclosure does not limit the scope of the embodiment.

[0066] In one exemplary embodiment, any one or more of the first support layer 22 and the second support layer 24 can be a material with a hard coating (HC). The HC layer, possessing high hardness and high water and oil resistance, can prevent scratches on the polarizer and is easier to clean. This disclosure does not limit the scope of the embodiment.

[0067] In one exemplary embodiment, the materials of the first support layer 22 and the second support layer 24 may be different.

[0068] In one exemplary embodiment, the thickness of the first support layer 22 and the thickness of the second support layer 24 may be different.

[0069] For example, the first support layer 22 can be formed of PET material, and the thickness of the first support layer 22 can be approximately 84 micrometers, and the second support layer 24 can be formed of NRT material, and the thickness of the second support layer 24 can be approximately 40 micrometers. Here, the embodiments disclosed herein do not limit the scope of the application.

[0070] In one exemplary embodiment, the adhesive layer 26 may be formed using, but is not limited to, a pressure-sensitive adhesive (PSA) material. This disclosure does not limit the scope of the embodiment.

[0071] In one exemplary embodiment, the adhesive layer 26 can be a haze layer, which may include pressure-sensitive adhesive (PSA) and dispersed particles, with the dispersed particles at least dispersed within the PSA. Thus, the adhesive layer 26 serves to adhere to adjacent film layers while simultaneously dispersing the direction of light propagation. For example, in any one or more haze layers of a second, third, and fourth polarizer, some dispersed particles may be dispersed within the PSA, while others may be dispersed on the surface of the PSA. In this case, the haze of the polarizer includes both internal haze and surface haze. For example, in the haze layer of a first polarizer, all dispersed particles may be uniformly dispersed within the PSA. In this case, the haze of the first polarizer refers to internal haze. Since the first polarizer is located on the outer surface of the first display liquid crystal panel, the matte finish of the display panel can be reduced, improving the user experience.

[0072] In one exemplary embodiment, the diameter of the dispersed particles can be approximately 1 micrometer to 10 micrometers. For example, the diameter of the dispersed particles can be approximately 1 micrometer, 2 micrometers, 3 micrometers, 4 micrometers, 5 micrometers, 6 micrometers, 7 micrometers, 8 micrometers, 9 micrometers, or 10 micrometers, etc. Here, the embodiments of this disclosure do not limit this.

[0073] In one exemplary embodiment, the thickness of the adhesive layer 26 may be approximately 18 micrometers.

[0074] In one exemplary embodiment, the thickness of the release layer 27 may be approximately 38 micrometers.

[0075] In one exemplary embodiment, the release layer 27 may be formed of PET material.

[0076] In one exemplary embodiment, the thickness of the protective layer 21 may be approximately 50 micrometers.

[0077] In one exemplary embodiment, the liquid crystal molecules in the first liquid crystal panel are positive liquid crystals, and the liquid crystal molecules in the second liquid crystal panel are negative liquid crystals. This disclosure does not limit the scope of the embodiments.

[0078] In one exemplary embodiment, the first liquid crystal panel can be a vertical electric field type display panel, such as a vertical alignment (VA) display mode. This allows the alignment direction of the first liquid crystal panel to be 90 degrees, meaning the optical axis direction of the liquid crystal molecules in the first liquid crystal panel can be 90 degrees. However, this disclosure does not limit the scope of the embodiment.

[0079] In one exemplary embodiment, the second liquid crystal panel can be a horizontal electric field type display panel, such as an Advanced Super Dimension Switch (ADS) display mode or an In Plane Switching (IPS) display mode. This allows the alignment direction of the second liquid crystal panel to be 0 degrees, meaning the optical axis direction of the liquid crystal molecules in the first liquid crystal panel can be 0 degrees. However, this disclosure does not limit the scope of the embodiment.

[0080] In one exemplary embodiment, the optical axis direction of the liquid crystal molecules in the first liquid crystal panel is perpendicular to the optical axis direction of the liquid crystal molecules in the second liquid crystal panel.

[0081] In one exemplary embodiment, the display panel further includes an adhesive layer located between the second polarizer and the third polarizer. The adhesive layer is configured to bond the second polarizer and the third polarizer together, thereby bonding the first liquid crystal panel and the second liquid crystal panel together. For example, the material of the adhesive layer may include, but is not limited to, optically clear adhesive (OCA) or optically clear resin (OCR). This disclosure does not limit the scope of the embodiments.

[0082] In addition to the structures listed above, the display panel in this embodiment may also include other necessary components and structures, such as gate lines, data lines, pixel electrodes, or common electrodes. Those skilled in the art can design and supplement accordingly based on the type of display panel, which will not be elaborated further here.

[0083] This disclosure also provides a display panel. Figure 3 This is a schematic diagram of a second structure of the display panel in an exemplary embodiment of the present disclosure, as shown below. Figure 3 As shown, the display panel may include: a first polarizer 11, a first liquid crystal panel 12, a second polarizer 13, a third polarizer 14, a second liquid crystal panel 15, and a fourth polarizer 16 stacked sequentially; wherein,

[0084] The first polarizer 11, the second polarizer 13, the third polarizer 14 and the fourth polarizer 16 are all polarizers with optical compensation layers;

[0085] The haze of the first polarizer 11 is less than that of the second polarizer 13. The haze of the second polarizer 13 is equal to that of the third polarizer 14, and the haze of the third polarizer 14 is greater than that of the fourth polarizer.

[0086] The optical axis of the first polarizer 11 is parallel to the optical axis of the liquid crystal molecules in the first liquid crystal panel 12, the optical axis of the second polarizer 13 is parallel to the optical axis of the liquid crystal molecules in the second liquid crystal panel 15, the optical axis of the third polarizer 14 is parallel to the optical axis of the second polarizer 13, and the optical axis of the fourth polarizer 16 is parallel to the optical axis of the first polarizer 11.

[0087] In one exemplary embodiment, the optical axis direction of the liquid crystal molecules in the first liquid crystal panel can be 90 degrees, the optical axis direction of the liquid crystal molecules in the second liquid crystal panel can be 0 degrees, the optical axis direction of the first polarizer is 90 degrees, the optical axis direction of the second polarizer can be 0 degrees, the optical axis direction of the third polarizer is 0 degrees, and the optical axis direction of the fourth polarizer is 90 degrees.

[0088] In one exemplary embodiment, the haze of the first polarizer may be approximately 55%; the haze of the second polarizer may be approximately 80%; the haze of the third polarizer may be approximately 80%; and the haze of the fourth polarizer may be approximately 42%.

[0089] This disclosure also provides a display panel. Figure 4 This is a schematic diagram of a third structure of the display panel in an exemplary embodiment of this disclosure, as shown below. Figure 4 As shown, the display panel may include: a first polarizer 11, a first liquid crystal panel 12, a second polarizer 13, a third polarizer 14, a second liquid crystal panel 15, and a fourth polarizer 16 stacked sequentially; wherein,

[0090] The first polarizer 11, the second polarizer 13, the third polarizer 14 and the fourth polarizer 16 are all polarizers with optical compensation layers;

[0091] The haze of the first polarizer 11 is less than that of the second polarizer 13. The haze of the second polarizer 13 is equal to that of the third polarizer 14, and the haze of the third polarizer 14 is greater than that of the fourth polarizer.

[0092] The optical axis of the first polarizer 11 is parallel to the optical axis of the liquid crystal molecules in the second liquid crystal panel 15, the optical axis of the second polarizer 13 is parallel to the optical axis of the liquid crystal molecules in the first liquid crystal panel 12, the optical axis of the third polarizer 14 is parallel to the optical axis of the second polarizer 13, and the optical axis of the fourth polarizer 16 is parallel to the optical axis of the first polarizer 11.

[0093] In one exemplary embodiment, the optical axis direction of the liquid crystal molecules in the first liquid crystal panel is 90 degrees, the optical axis direction of the liquid crystal molecules in the second liquid crystal panel is 0 degrees, the optical axis direction of the first polarizer is 0 degrees, the optical axis direction of the second polarizer is 90 degrees, the optical axis direction of the third polarizer is 90 degrees, and the optical axis direction of the fourth polarizer is 0 degrees.

[0094] In one exemplary embodiment, the haze of the first polarizer may be approximately 55%; the haze of the second polarizer may be approximately 80%; the haze of the third polarizer may be approximately 80%; and the haze of the fourth polarizer may be approximately 42%.

[0095] The following example uses a 31.5UHD BD Cell display panel, where the first liquid crystal panel uses positive wide-temperature liquid crystal with an alignment direction of 90 degrees, and the second liquid crystal panel uses negative liquid crystal with an alignment direction of 0 degrees. The display panel provided in this embodiment will be explained through experiments.

[0096] Table 1 shows the experimental results of L0 luminance, L255 luminance, and contrast ratio (CR) for different polarizers. The first type of polarizer has no optical compensation layer, the second type has a Z-type compensation layer, the third type has a +B type compensation layer and a -B type compensation layer, and the fourth type has a +A type compensation layer and a +C type compensation layer.

[0097] As shown in Table 1, comparing the experimental results of the first type of polarizer and the second type of polarizer, it can be found that after setting the second type of polarizer in the display panel, the brightness of the L0 of the display panel can be reduced by about 70%, while the brightness of L255 is reduced by only about 17%. Therefore, the contrast ratio of the BD cell can be greatly improved from 197,000 to 1,799,000 (this experiment does not consider the color shift and rainbow effect at large viewing angles), thus achieving a high-contrast display panel.

[0098] The first type of polarizer The second type of polarizer The third type of polarizer The fourth type of polarizer L0 0.0057 0.0005 0.0005 0.0005 L255 1122.9 899.625 913.53 938.32 CR 197,000 1.799 million 1.827 million 1.877 million

[0099] Table 1. L0 luminance, L255 luminance, and contrast ratio (CR) for different polarizers.

[0100] As shown in Table 1, comparing the experimental results of the first and third polarizers, it can be found that after setting the third polarizer in the display panel, the L0 brightness of the display panel can be significantly reduced, from 0.0057 nits to 0.0005 nits, while the L255 brightness only decreases slightly, from 1122.9 nits to 913.53 nits. Thus, the BD Cell contrast ratio can be significantly improved, from 197,000 to 1,827,000 (this experiment did not consider the color shift and rainbow effect at large viewing angles), achieving a high-contrast display panel.

[0101] As shown in Table 1, comparing the experimental results of the first and fourth polarizers, it can be found that after setting the fourth polarizer in the display panel, the L0 brightness of the display panel can be significantly reduced, from 0.0057 nits to 0.0005 nits, while the L255 brightness only decreases slightly, from 1122.9 nits to 938.32 nits. Thus, the BD Cell contrast ratio can be significantly improved, from 197,000 to 1,877,000 (this experiment did not consider the color shift and rainbow effect at large viewing angles), achieving a high-contrast display panel.

[0102] The above analysis shows that the contrast ratio obtained by using a polarizer with an optical compensation layer in a display panel is much greater than that obtained by using a polarizer without an optical compensation layer in a display panel, reaching levels of over one million.

[0103] Figure 5A This is an illustration of the improved effect of viewing characters in a red background. Figure 5B This is an illustration showing the improved effect of viewing characters in a green background. Figure 5C This is a schematic diagram illustrating the improved polarization effect on large-view characters under a blue background. In each set of comparison images, the top image shows the use of a normal polarizer in the display panel, i.e., a polarizer without an optical compensation layer; the bottom left image shows the use of a polarizer with an optical compensation layer in the display panel, matched in O-mode; and the bottom right image shows the use of a polarizer with an optical compensation layer in the display panel, matched in E-mode. In the exemplary embodiment of this disclosure, when the operating mode is matched in O-mode, the optical axis direction of the liquid crystal molecules in the first liquid crystal panel is 90 degrees, the optical axis direction of the liquid crystal molecules in the second liquid crystal panel is 0 degrees, the optical axis direction of the first polarizer is 0 degrees, the optical axis direction of the second polarizer can be 90 degrees, the optical axis direction of the third polarizer is 90 degrees, and the optical axis direction of the fourth polarizer is 0 degrees. In an exemplary embodiment of this disclosure, under E-mode matching, the optical axis direction of the liquid crystal molecules in the first liquid crystal panel is 90 degrees, the optical axis direction of the liquid crystal molecules in the second liquid crystal panel is 0 degrees, the optical axis direction of the first polarizer is 90 degrees, the optical axis direction of the second polarizer is 0 degrees, the optical axis direction of the third polarizer is 0 degrees, and the optical axis direction of the fourth polarizer is 90 degrees.

[0104] The issue of perspective bias in large-view scenes essentially manifests as light leakage from an oblique angle, resulting in varying degrees of color shift due to different color mixing in red, green, and blue scenes. For example... Figures 5A to 5C As shown, compared to the color shift effect obtained by using a polarizer without an optical compensation layer, using a polarizer with an optical compensation layer can suppress light leakage by compensating for the optical path difference of polarized light, thereby improving the color shift problem. Furthermore, the color shift improvement effect of matching O-mode is better than that of E-mode.

[0105] The mechanism of rainbow patterns is that the black matrix (BM) of the second liquid crystal panel blocks the light passing through the first liquid crystal panel, and the position of the blockage moves with the viewing angle, thus forming periodic rainbow patterns. Tests have shown that polarizing light after passing through a haze-treated polarizer changes the collimation of the light path. Although this slightly increases the brightness at side viewing angles and slightly reduces the contrast, using a high-haze polarizer can significantly suppress rainbow patterns.

[0106] like Figure 6 As shown, compared to a control display panel using a polarizer without an optical compensation layer, the contrast ratio can be increased from 197,000 to 1,799,000 by using only the polarizer with an optical compensation layer provided in the exemplary embodiments of this disclosure in the display panel, without simultaneously addressing the issues of color shift at large viewing angles and rainbow effects. Furthermore, compared to a display panel using a polarizer without an optical compensation layer, the display panel provided in the exemplary embodiments of this disclosure, by employing a polarizer with an optical compensation layer, a haze-treated polarizer, and aligning the optical axis of the polarizer with the optical axis of the liquid crystal molecules, can achieve a contrast ratio increase from 197,000 to 991,000 while simultaneously addressing the issues of color shift at large viewing angles and rainbow effects. Therefore, the display panel provided in the exemplary embodiments of this disclosure can achieve a contrast ratio of one million while simultaneously improving color shift at large viewing angles and significantly suppressing rainbow effects.

[0107] This disclosure also provides a display device, such as... Figure 7 As shown, the display device may include: a display panel as described in one or more of the above embodiments, wherein the first liquid crystal panel 12 may include: a first array substrate 121 and a first opposing substrate 122 disposed opposite to each other, and a first liquid crystal layer 123 disposed between the first array substrate 121 and the first opposing substrate 122; the second liquid crystal panel 15 may include: a second array substrate 151 and a second opposing substrate 152 disposed opposite to each other, and a second liquid crystal layer 153 disposed between the second array substrate 151 and the second opposing substrate 152.

[0108] In one exemplary embodiment, the optical axis direction of the liquid crystal molecules in the first liquid crystal layer 123 is 90 degrees; the optical axis direction of the liquid crystal molecules in the second liquid crystal layer 153 is 0 degrees; the optical axis direction of the first polarizer is 90 degrees; the optical axis direction of the second polarizer is 0 degrees; the optical axis direction of the third polarizer is 0 degrees; and the optical axis direction of the fourth polarizer is 90 degrees.

[0109] In one exemplary embodiment, such as Figure 7As shown, the display device may further include: a backlight module 31, disposed on the non-display side of the display panel, configured to provide initial backlight to the second liquid crystal panel 15. The second liquid crystal panel 15 may be referred to as a sub-cell, a dimming panel, or a light-controlling panel. The second liquid crystal panel 15 is configured to adjust the initial backlight provided by the backlight module 30, providing adjusted backlight to the first liquid crystal panel 12. The first liquid crystal panel 12 may be referred to as a main cell. The first liquid crystal panel 12 is configured to receive the adjusted backlight and display different grayscale colors. In this way, the brightness of the backlight provided to the second liquid crystal panel can be controlled by region by the deflection angle of the liquid crystal molecules in the liquid crystal layer of the first liquid crystal panel.

[0110] In one exemplary embodiment, the first liquid crystal panel and the second liquid crystal panel may have the same external dimensions and functional dimensions. For example, the first and second liquid crystal panels may have the same shape and size, and the display area in the second liquid crystal panel may have the same shape and size as the light-controlling area in the first liquid crystal panel. This allows the light-controlling area to correspond to the display area after the first and second liquid crystal panels are aligned and bonded, so that the backlight emitted by the backlight module is provided to the display area after being controlled by the light-controlling area. For example, the display area in the first liquid crystal panel may include a plurality of display pixels; the light-controlling area in the second liquid crystal panel may include a plurality of light-controlling pixels.

[0111] In one exemplary embodiment, the first liquid crystal panel may be a liquid crystal panel having a color filter layer. The second liquid crystal panel may be a monochrome liquid crystal panel without a color filter layer.

[0112] In one exemplary embodiment, such as Figure 7 As shown, the first liquid crystal panel 12 may further include a color filter layer 124 and a black matrix (not shown) disposed on the same layer. For example, the color filter layer 124 may be disposed on the side of the first array substrate 121 near the first liquid crystal layer 123, or the color filter layer 124 may be disposed on the side of the first opposing substrate 122 near the first liquid crystal layer 123. Here, the embodiments disclosed herein do not limit this.

[0113] In one exemplary embodiment, the color filter layer may include: a first color filter unit, a second color filter unit, and a third color filter unit arranged periodically. The first color filter unit is configured to filter light passing through it to filter out a first color light; the second color filter unit is configured to filter light passing through it to filter out a second color light; and the third color filter unit is configured to filter light passing through it to filter out a third color light. For example, the color filter layer may include: a red (R) color filter unit, a green (G) color filter unit, and a blue (B) color filter unit arranged periodically, or a red (R) color filter unit, a green (G) color filter unit, a blue (B) color filter unit, and a white (W) color filter unit arranged periodically. This disclosure does not limit the scope of the embodiments.

[0114] In one exemplary embodiment, the display device may include, but is not limited to, any product or component with display functionality such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Here, this disclosure does not limit the type of display device. Other essential components of the display device are those that should be understood by those skilled in the art, and are not described in detail here, nor should they be construed as limiting this disclosure.

[0115] The description of the above display device embodiments is similar to that of the above display panel embodiments, and has similar beneficial effects. For technical details not disclosed in the display device embodiments of this disclosure, those skilled in the art should refer to the description in the display panel embodiments of this disclosure for understanding, and will not repeat them here.

[0116] While the embodiments disclosed herein are as described above, the above content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit this disclosure. Any person skilled in the art to which this disclosure pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed herein, but the scope of patent protection of this disclosure shall still be determined by the scope defined in the appended claims.

Claims

1. A display panel, comprising: The first polarizer, the first liquid crystal panel, the second polarizer, the third polarizer, the second liquid crystal panel and the fourth polarizer are sequentially stacked; wherein The first polarizer, the second polarizer, the third polarizer and the fourth polarizer are polarizers with optical compensation layers; in the thickness direction of the display panel, the polarizer with the optical compensation layer comprises: a protective layer, a first support layer, a polarizing layer, a second support layer, an optical compensation layer, an adhesive layer and a release layer which are sequentially stacked; the optical compensation layer comprises: one compensation layer or two compensation layers, the one compensation layer is a Z-type compensation layer, the two compensation layers comprise: a +B-type compensation layer and a -B-type compensation layer which are stacked, or a +A-type compensation layer and a +C-type compensation layer which are stacked; the adhesive layer is a haze layer, the haze layer comprises: a pressure-sensitive adhesive and dispersed particles, the dispersed particles are at least dispersed in the pressure-sensitive adhesive; The haze of the first polarizer is less than the haze of the second polarizer, and the haze of the third polarizer is greater than the haze of the fourth polarizer; The liquid crystal molecules in the first liquid crystal panel are positive liquid crystals, and the liquid crystal molecules in the second liquid crystal panel are negative liquid crystals; the optical axis direction of the first polarizer is parallel to the optical axis direction of the liquid crystal molecules in one of the first liquid crystal panel and the second liquid crystal panel, the optical axis direction of the second polarizer is parallel to the optical axis direction of the liquid crystal molecules in the other of the first liquid crystal panel and the second liquid crystal panel, the optical axis direction of the third polarizer is parallel to the optical axis direction of the second polarizer, and the optical axis direction of the fourth polarizer is parallel to the optical axis direction of the first polarizer.

2. The display panel of claim 1, wherein, The haze of the first polarizer is greater than the haze of the fourth polarizer.

3. The display panel of claim 1, wherein, The haze of the second polarizer is equal to the haze of the third polarizer.

4. The display panel of claim 1, wherein, The display panel satisfies any one or more of the following conditions: The ratio between the haze of the first polarizer and the haze of the second polarizer is 0.6 to 0.7; the ratio between the haze of the first polarizer and the haze of the third polarizer is 0.6 to 0.7; the ratio between the haze of the first polarizer and the haze of the fourth polarizer is 1.25 to 1.4; the ratio between the haze of the second polarizer and the haze of the third polarizer is 0.95 to 1.05; the ratio between the haze of the second polarizer and the haze of the fourth polarizer is 1.8 to 2; and the ratio between the haze of the third polarizer and the haze of the fourth polarizer is 1.8 to 2.

5. The display panel of claim 1, wherein, The display panel satisfies any one or more of the following conditions: The haze of the first polarizer is 45% to 65%; the haze of the second polarizer is 70% to 90%; the haze of the third polarizer is 70% to 90%; and the haze of the fourth polarizer is 30% to 50%.

6. The display panel according to any one of claims 1 to 5, wherein, The display panel satisfies any one or more of the following conditions: The haze of the first polarizer is 55%; the haze of the second polarizer is 80%; the haze of the third polarizer is 80%; and the haze of the fourth polarizer is 40% or 42%.

7. The display panel of claim 1, wherein, The in-plane optical path difference compensation value RoZ of the Z-type compensation layer ranges from 220nm to 320nm, and the thickness direction optical path difference compensation value RthZ of the Z-type compensation layer ranges from 0nm to 1nm.

8. The display panel of claim 7, wherein, The in-plane optical path difference compensation value RoZ of the Z-type compensation layer is 270nm, and the thickness direction optical path difference compensation value RthZ of the Z-type compensation layer is 0.5nm.

9. The display panel of claim 1, wherein, The in-plane optical path difference compensation value Ro+B of the +B-type compensation layer ranges from 14nm to 34nm, the thickness direction optical path difference compensation value Rth+B of the +B-type compensation layer ranges from -100nm to -75nm, the in-plane optical path difference compensation value Ro-B of the -B-type compensation layer ranges from 106nm to 126nm, and the thickness direction optical path difference compensation value Rth-B of the -B-type compensation layer ranges from 71nm to 91nm.

10. The display panel of claim 9, wherein, The in-plane optical path difference compensation value Ro+B of the +B-type compensation layer is 27nm, the thickness direction optical path difference compensation value Rth+B of the +B-type compensation layer is -87nm, the in-plane optical path difference compensation value Ro-B of the -B-type compensation layer is 116nm, and the thickness direction optical path difference compensation value Rth-B of the -B-type compensation layer is 81nm.

11. The display panel of claim 1, wherein, The in-plane optical path difference compensation value Ro+A of the +A-type compensation layer ranges from 115nm to 135nm, the thickness direction optical path difference compensation value Rth+A of the +A-type compensation layer ranges from 52nm to 72nm, the in-plane optical path difference compensation value Ro+C of the +C-type compensation layer ranges from 0nm to 5nm, and the thickness direction optical path difference compensation value Rth+C of the +C-type compensation layer ranges from -107nm to -67nm.

12. The display panel of claim 11, wherein, The in-plane optical path difference compensation value Ro+A of the +A-type compensation layer is 125nm, the thickness direction optical path difference compensation value Rth+A of the +A-type compensation layer is 62nm, the in-plane optical path difference compensation value Ro+C of the +C-type compensation layer is 0nm, and the thickness direction optical path difference compensation value Rth+C of the +C-type compensation layer is -97nm.

13. The display panel of claim 11, wherein, The in-plane optical path difference compensation value Ro+A of the +A-type compensation layer is 125nm, the thickness direction optical path difference compensation value Rth+A of the +A-type compensation layer is 62nm, the in-plane optical path difference compensation value Ro+C of the +C-type compensation layer is 0nm, and the thickness direction optical path difference compensation value Rth+C of the +C-type compensation layer is -78nm.

14. The display panel of claim 1, wherein, The optical axis direction of the liquid crystal molecules in the first liquid crystal panel is perpendicular to the optical axis direction of the liquid crystal molecules in the second liquid crystal panel.

15. The display panel of claim 14, wherein, The optical axis direction of the liquid crystal molecules in the first liquid crystal panel is 90 degrees, the optical axis direction of the liquid crystal molecules in the second liquid crystal panel is 0 degrees, the optical axis direction of the first polarizer is 90 degrees, the optical axis direction of the second polarizer is 0 degrees, the optical axis direction of the third polarizer is 0 degrees, and the optical axis direction of the fourth polarizer is 90 degrees.

16. The display panel of claim 14, wherein, The optical axis direction of the liquid crystal molecules in the first liquid crystal panel is 90 degrees, the optical axis direction of the liquid crystal molecules in the second liquid crystal panel is 0 degrees, the optical axis direction of the first polarizer is 0 degrees, the optical axis direction of the second polarizer is 90 degrees, the optical axis direction of the third polarizer is 90 degrees, and the optical axis direction of the fourth polarizer is 0 degrees.

17. A display device comprising: The display panel of any one of claims 1 to 16, wherein the first liquid crystal panel comprises a first array substrate and a first opposite substrate arranged oppositely, and a first liquid crystal layer arranged between the first array substrate and the first opposite substrate; and the second liquid crystal panel comprises a second array substrate and a second opposite substrate arranged oppositely, and a second liquid crystal layer arranged between the second array substrate and the second opposite substrate.

18. The display device of claim 17, wherein, The optical axis direction of the liquid crystal molecules in the first liquid crystal layer is 90 degrees; the optical axis direction of the liquid crystal molecules in the second liquid crystal layer is 0 degrees; the optical axis direction of the first polarizer is 90 degrees; the optical axis direction of the second polarizer is 0 degrees; the optical axis direction of the third polarizer is 0 degrees; the optical axis direction of the fourth polarizer is 90 degrees; the haze of the first polarizer is 55%; the haze of the second polarizer is 80%; the haze of the third polarizer is 80%; and the haze of the fourth polarizer is 42%.

Images