WO2023102777A1

WO2023102777A1 - Display panel and display device

Info

Publication number: WO2023102777A1
Application number: PCT/CN2021/136496
Authority: WO
Inventors: 方涛; 范文丽; 曾泽村; 王宝强; 朴相镇; 杨义许; 张天峰
Original assignee: 京东方科技集团股份有限公司; 福州京东方光电科技有限公司
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-06-15
Also published as: CN116583781A

Abstract

A display panel and a display device. The display panel comprises a first polarizer, a first liquid crystal panel, a second polarizer, a third polarizer, a second liquid crystal panel and a fourth polarizer, which are sequentially stacked, 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 the haze of the second polarizer, and the haze of the third polarizer is greater than the haze of the fourth polarizer; and the optical axis direction of the first polarizer is parallel to the optical axis direction of 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 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.

Description

Display panel and display device

technical field

Embodiments of the present disclosure relate to but are not limited to the field of display technologies, and in particular, relate to a display panel and a display device.

Background technique

Liquid Crystal Display (LCD) panels have the characteristics of small size, low power consumption, and no radiation, and have been developed rapidly in recent years. A double-layer display device is usually a stacked and laminated structure of two liquid crystal panels. However, due to factors such as pixel design, scattering of the material itself, or process limitations, the actual contrast loss of the current double-layer display device is relatively low. Severe, large-view character deviation and rainbow pattern problems.

Contents of the invention

The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.

On the one hand, an embodiment of the present disclosure provides 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 in sequence; in,

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;

The haze of the first polarizer is smaller than the haze of the second polarizer, and the haze of the third polarizer is greater than the haze of the fourth polarizer;

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, and the optical axis direction of the second polarizer is parallel to the first The liquid crystal panel is parallel to the optical axis direction of the liquid crystal molecules of the other of 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 fourth polarizer The optical axis direction of the sheet is parallel to the optical axis direction of the first polarizer.

On the other hand, an embodiment of the present disclosure further 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 a substrate, and a first liquid crystal layer arranged between the first array substrate and the first counter substrate; the second liquid crystal panel includes: a second array substrate and a second counter substrate oppositely arranged, and A second liquid crystal layer disposed between the second array substrate and the second opposite substrate.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure. Other advantages of the present disclosure can be realized and obtained through the solutions described in the specification and the accompanying drawings.

Other aspects will be apparent to others upon reading and understanding the drawings and detailed description.

Description of drawings

The accompanying drawings are used to provide an understanding of the technical solutions of the present disclosure, and constitute a part of the description, and are used together with the embodiments of the present disclosure to explain the technical solutions of the present disclosure, and do not constitute limitations to the technical solutions of the present disclosure. The shape and size of each component in the drawings do not reflect true scale, but are for the purpose of schematically illustrating the present disclosure.

FIG. 1 is a first structural schematic diagram of a display panel in an exemplary embodiment of the present disclosure;

2 is a schematic structural diagram of a polarizer in an exemplary embodiment of the present disclosure;

FIG. 3 is a second structural schematic diagram of a display panel in an exemplary embodiment of the present disclosure;

FIG. 4 is a third structural schematic diagram of a display panel in an exemplary embodiment of the present disclosure;

Fig. 5A is a schematic diagram of the improvement effect of large-view role deviation under the red screen;

FIG. 5B is a schematic diagram of the improvement effect of large-view role deviation under the green screen;

Fig. 5C is a schematic diagram of the improvement effect of large-view role deviation under the blue screen;

6 is a schematic diagram of a contrast result of a display panel in an exemplary embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a display device in an exemplary embodiment of the present disclosure.

Detailed ways

A number of embodiments are described herein, but the description is exemplary rather than limiting, and 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 drawings and discussed in the exemplary embodiments, many other combinations of the disclosed features are possible. Except where expressly limited, any feature or element of any embodiment may be used in combination with, or substituted for, any other feature or element of any other embodiment.

In describing representative embodiments, the specification may have presented a method or process as a particular sequence of steps. However, to the extent the method or process is not dependent on a particular order of the steps herein, the method or process should not be limited to the particular order of the steps. Other sequences of steps are possible, as will be understood by those of ordinary skill in the art. Therefore, the specific order of the steps set forth in the specification should not be construed as limitations on the claims. Furthermore, claims to the method or process should not be limited to performing their steps in the order written, as those skilled in the art will readily understand that such order can be varied and still remain within the spirit and scope of the disclosed embodiments.

In the drawings, the size of each component, the thickness of a layer, or a region is sometimes exaggerated for the sake of clarity. Therefore, one aspect of the present disclosure is not necessarily limited to the size, and the shape and size of each component in the drawings do not reflect the true scale. In addition, the drawings schematically show ideal examples, and one aspect of the present disclosure is not limited to shapes, numerical values, and the like shown in the drawings.

In the exemplary embodiments of the present disclosure, ordinal numerals such as "first", "second", and "third" are provided to avoid confusion of constituent elements, rather than to limit in terms of quantity.

In the exemplary embodiments of the present disclosure, for convenience, "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom" are used , "inner", "outer" and other words indicating orientation or positional relationship are used to illustrate the positional relationship of constituent elements with reference to the drawings, which are only for the convenience of describing this specification and simplifying the description, rather than indicating or implying that the referred device or element has Certain orientations, constructed and operative in certain orientations, therefore are not to be construed as limitations of the present disclosure. The positional relationship of the constituent elements changes appropriately according to the direction in which each constituent element is described. Therefore, it is not limited to the words and phrases described in the specification, and may be appropriately replaced according to circumstances.

In the exemplary embodiments of the present disclosure, the terms "installation", "connection" and "connection" should be interpreted in a broad sense unless otherwise specified and limited. For example, it may be a fixed connection, or a detachable connection, or an integral connection; it may be a mechanical connection, or an electrical connection; it may be a direct connection, or an indirect connection through an intermediate piece, or an internal communication between two components. Those of ordinary skill in the art can understand the meanings of the above terms in the present disclosure according to the situation.

In an exemplary embodiment of the present disclosure, "electrically connected" includes a case where constituent elements are connected together through an element having some kind of electrical function. The "element having some kind of electrical action" is not particularly limited as long as it can transmit and receive electrical signals between connected components. The "element having some kind of electrical function" may be, for example, an electrode or a wiring, or a switching element such as a transistor, or other functional elements such as a resistor, an inductor, or a capacitor.

In an exemplary embodiment of the present disclosure, a transistor refers to at least including 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) ) components of these three terminals. A transistor has a channel region between a drain electrode and a source electrode, and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, a channel region refers to a region through which current mainly flows.

In the exemplary embodiments of the present disclosure, in order to distinguish the two electrodes of the transistor except the gate electrode (gate or control electrode), it is directly described that one of them is the first electrode and the other is the second electrode, wherein the first electrode can be may be a drain electrode and the second electrode may be a source electrode, or the first electrode may be a source electrode and the second electrode may be a drain electrode. In cases where transistors with opposite polarities are used or when the direction of current changes during circuit operation, the functions of the "source electrode" and "drain electrode" may be interchanged. Therefore, in this specification, "source electrode" and "drain electrode" can be interchanged with each other.

In an exemplary embodiment of the present disclosure, the transistor may be a thin film transistor (Thin Film Transistor, TFT) or a field effect transistor (Field Effect Transistor, FET), or other devices with the same characteristics. For example, the thin film transistor is an oxide transistor (Oxide TFT) or a low temperature polysilicon thin film transistor (Low Temperature Poly-silicon TFT, LTPS TFT). Here, the embodiments of the present disclosure do not limit this.

In the exemplary embodiment of the present disclosure, “parallel” refers to a state where the angle formed by two straight lines is not less than -10° and not more than 10°, and therefore, a state where the angle is not less than -5° and not more than 5° is also included. In addition, "perpendicular" means a state in which the angle formed by two straight lines is 80° to 100°, and therefore also includes an angle of 85° to 95°.

In the exemplary embodiments of the present disclosure, "about" refers to a numerical value that is not strictly limited, and is within the range of process and measurement errors.

In an exemplary embodiment of the present disclosure, the first direction DR1 may refer to the row direction, the second direction DR2 may refer to the column direction, and the third direction DR3 may refer to the direction perpendicular to the plane of the display panel or the thickness direction of the display panel, etc. . Wherein, 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 may be perpendicular to each other, and the first direction DR1 and the third direction DR3 may be perpendicular to each other.

In an exemplary embodiment of the present disclosure, haze is one of important optical properties of a film article. Haze reflects the ability of a film to scatter visible light. Among them, haze (H) can be divided into: surface haze (Hs) and internal haze (Hi).

In an exemplary embodiment of the present disclosure, the surface treatment of the polarizer may include: haze treatment, or anti-glare (Anti-Glare, AG) treatment, and the like.

The main structure of the LCD includes a thin film transistor array (Thin Film Transistor, TFT) substrate and a counter substrate of a cell (CELL). Liquid Crystal (LC) molecules are filled between the array substrate and the counter substrate. By controlling the common electrode and pixel electrodes to form an electric field to drive liquid crystal deflection to realize grayscale display. BD Cell display technology superimposes two LCD panels to form a dual-cell (Dual Cell) display product. It adopts the local backlight modulation (Local Diming) technology that divides the LCD panel into millions of individual areas, and can display in submillimeters finer brightness adjustment within a range of levels. As shown in the following formula (1), according to the definition of contrast, the contrast ratio (Contrast Ratio, CR) of BD Cell products is the L255 (bright state) brightness of BD Cell products divided by the L0 (dark state) brightness of BD Cell products, that is, BD Cell The contrast ratio of the 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 Ultra-Dimensional Field Switching) LCD panel is generally between 1000 and 2000. Therefore, the theoretical contrast ratio of BD Cell can reach more than one million levels. However, the contrast loss of BD Cell products currently produced is serious. In actual tests, the contrast ratio is distributed between tens of thousands to hundreds of thousands (within 300,000), which is far from the theoretical value (above one million). For example, taking a 31.5-inch UHD (Ultra High Definition) BD Cell product as an example, the contrast ratios of the Main Cell and Sub Cell can be 1000:1 and 1700:1 respectively. However, the actual The test contrast is only 191,000, which is about 89% away from the theoretical value.

In formula (1), CR represents the contrast ratio of the double-layer display product, Br _L255 represents the L255 brightness of the double-layer display product, Br _L0 represents the L0 brightness of the double-layer display product, and Br _BLU represents the backlight module (Back Ligth Unit, BLU ), Tr _Sub-L255 represents the L255 transmittance of the sub-display panel, Tr _Sub-L0 represents the L0 transmittance of the sub-display panel, Tr _Main-L255 represents the L255 transmittance of the main display panel, and Tr _Main-L0 Indicates the L0 transmittance of the main display panel.

In addition, because BD Cell products generally have the advantage of 89° viewing angle of up, down, left, and right, however, as the viewing angle increases, the picture display will gradually appear distorted, manifested as color shift, resulting in a decrease in display quality. Thereby, the popularization and application of products in fields such as monitors and medical treatment are affected. Since BD Cell products are bonded by Main Cell and Sub Cell, the phenomenon of diffraction of light after periodic pixel arrangement will cause rainbow patterns.

Therefore, it is particularly important to realize BD Cell’s mega-contrast ratio and to solve the problem of large-view character deviation and rainbow pattern.

An embodiment of the present disclosure provides a display panel. Fig. 1 is a first structural schematic diagram of a display panel in an exemplary embodiment of the present disclosure. As shown in Fig. 1 , in a direction (third direction DR3) perpendicular to the display panel, the display panel may include: The first polarizer 11, the first liquid crystal panel 12, the second polarizer 13, the third polarizer 14, the second liquid crystal panel 15 and the fourth polarizer 16; wherein, the first polarizer 11, the second polarizer 13 , at least one of 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 the haze of the second polarizer 13, and the third polarizer 14 The haze is greater than the haze of the fourth polarizer; the optical axis direction of the first polarizer 11 is parallel to the optical axis direction of a liquid crystal molecule in the first liquid crystal panel 12 and the second liquid crystal panel 15, and the second polarizer 13 The optical axis direction is parallel to the optical axis direction of the other liquid crystal molecule in the first liquid crystal panel 12 and the second liquid crystal panel 15, the optical axis direction of the third polarizer 14 is parallel to the optical axis direction of the second polarizer 13, and the second The optical axes of the four polarizers 16 are parallel to the optical axes of the first polarizer 11 .

In this way, in the display panel provided by the embodiments of the present disclosure, by using a polarizer with an optical compensation layer, a haze-treated polarizer, and combining the optical axis direction of the polarizer with the optical axis direction of the liquid crystal molecules, On the one hand, it can reduce the light leakage in the dark state, reduce the brightness of the display panel in the dark state, improve the contrast of the display panel, and improve the problem of large viewing angles. On the other hand, the collimation of the optical path can be changed, and the problem of rainbow fringe can be suppressed.

In an exemplary embodiment, the haze of the first polarizer is greater than the haze of the fourth polarizer. For example, the haze of the first polarizer may be about 55%, and the haze of the fourth polarizer may be about 40% or 42%. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the haze of the second polarizer is equal to the haze of the third polarizer. For example, the haze of the second polarizer may be about 80%, and the haze of the third polarizer may be about 80%. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the display panel may meet 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 about 0.6 to 0.7; The ratio between the haze of the first polarizer and the haze of the third polarizer may be about 0.6 to 0.7; the ratio between the haze of the first polarizer and the haze of the fourth polarizer may be about 1.25 to 1.4; the ratio between the haze of the second polarizer and the haze of the third polarizer can be about 0.95 to 1.05; the ratio between the haze of the second polarizer and the haze of the fourth polarizer can be about 1.8 to 2; and the ratio between the haze of the third polarizer and the haze of the fourth polarizer may be about 1.8 to 2. Here, the embodiments of the present disclosure do not limit this.

For example, the ratio between the haze of the first polarizer and the haze of the second polarizer may include but 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 example, the ratio between the haze of the first polarizer and the haze of the second polarizer can be about 0.69 as an example, the haze of the first polarizer can be about 55%, and the haze of the second polarizer can be About 80%. Here, the embodiments of the present disclosure do not limit this.

For example, the ratio between the haze of the first polarizer and the haze of the third polarizer may include but 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 example, taking the haze of the first polarizer and the haze of the third polarizer between about 0.68 and 0.69 as an example, the haze of the first polarizer can be about 55%, and the haze of the third polarizer can be About 80%. Here, the embodiments of the present disclosure do not limit this.

For example, the ratio between the haze of the first polarizer and the haze of the fourth polarizer may include but 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, etc. For example, the ratio between the haze of the first polarizer and the haze of the fourth polarizer can be about 1.31, the haze of the first polarizer can be about 55%, and the haze of the fourth polarizer can be about 42%. Or, the ratio between the haze of the first polarizer and the haze of the fourth polarizer can be about 1.38 as an example, the haze of the first polarizer can be about 55%, and the haze of the fourth polarizer can be About 40%. Here, the embodiments of the present disclosure do not limit this.

For example, the ratio between the haze of the second polarizer and the haze of the third polarizer may include but 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 wait. For example, taking the ratio between the haze of the second polarizer and the haze of the third polarizer to be about 1 as an example, the haze of the second polarizer can be about 80%, and the haze of the third polarizer can be about 80%. 80%. Here, the embodiments of the present disclosure do not limit this.

For example, the ratio between the haze of the second polarizer and the haze of the fourth polarizer may include but 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 etc. For example, taking the ratio between the haze of the second polarizer and the haze of the fourth polarizer to be about 2 as an example, the haze of the second polarizer can be about 80%, and the haze of the fourth polarizer can be about 40%. Or, taking the ratio between the haze of the second polarizer and the haze of the fourth polarizer as an example of about 1.9, the haze of the second polarizer can be about 80%, and the haze of the fourth polarizer can be about for 42%. Here, the embodiments of the present disclosure do not limit this.

For example, the ratio between the haze of the third polarizer and the haze of the fourth polarizer may include but 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 etc. For example, taking the ratio between the haze of the third polarizer and the haze of the fourth polarizer to be about 2 as an example, the haze of the third polarizer can be about 80%, and the haze of the fourth polarizer can be about 40%. Or, taking the ratio between the haze of the third polarizer and the haze of the fourth polarizer as an example of about 1.9, the haze of the third polarizer can be about 80%, and the haze of the fourth polarizer can be about for 42%. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the display panel may meet 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 of the present disclosure do not limit this.

For example, the haze of the first polarizer may include but not limited to: 45%, 50%, 55%, 60% or 65%. For example, the haze of the first polarizer may be about 55%. Here, the embodiments of the present disclosure do not limit this. Wherein, the haze of the first polarizer may refer to the internal haze of the first polarizer, for example, dispersed particles are dispersed in the pressure-sensitive adhesive in the haze layer of the first polarizer. In this way, since the first polarizer is located on the outer surface of the first liquid crystal display panel, the frosted feeling of the display panel can be reduced and user experience can be improved.

For example, the haze of the second polarizer may include but not limited to: 70%, 75%, 80%, 85% or 90% and so on. For example, the haze of the second polarizer may be about 80%. Here, the embodiments of the present disclosure do not limit this.

For example, the haze of the third polarizer may include but not limited to: 70%, 75%, 80%, 85% or 90% and so on. For example, the haze of the third polarizer may be about 80%. Here, the embodiments of the present disclosure do not limit this.

For example, the haze of the fourth polarizer may include but not limited to: 30%, 35%, 40%, 41%, 42%, 43%, 44%, 45%, or 50%. For example, the haze of the fourth polarizer may be 40% or 42%. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the display panel may meet any one or more of the following conditions: the haze of the first polarizer may be about 55%; the haze of the second polarizer may be about 80%; The haze of the third polarizer may be about 80%; and the haze of the fourth polarizer may be about 40% or 42%. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, as shown in FIG. 2 , in the direction perpendicular to the display panel, the polarizer with an optical compensation layer includes: a protective layer 21, a first supporting layer 22, and a polarizing layer 23 stacked in sequence. , the second supporting layer 24, the optical compensation layer 25, the adhesive layer 26 and the release layer 27.

In an exemplary embodiment, the polarizing layer in the polarizer is the polarizing layer. For example, the polarizing layer may include but is not limited to be formed using polyvinyl alcohol (Professional Video Assistant, PVA) material. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the optical compensation layer 25 may include: one compensation layer or two compensation layers. For example, one 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 of the present disclosure do not limit this.

In an exemplary embodiment, the range of the in-plane optical path difference compensation value RoZ of the Z-type compensation layer may be about: 220nm≤RoZ≤320nm; the range of the optical path difference compensation value RthZ in the thickness direction of the Z-type compensation layer It is: 0nm≤RoZ≤1nm. For example, the in-plane optical path difference compensation value RoZ of the Z-type compensation layer may be about 270 nm (nanometer), and the optical path difference compensation value RthZ of the Z-type compensation layer in the thickness direction may be about 0.5 nm. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the range of the in-plane optical path difference compensation value Ro+B of the +B type compensation layer is: 14nm≤Ro+B≤34nm; the optical path difference compensation value of the +B type compensation layer in the thickness direction The range of value Rth+B is: -100nm≤Rth+B≤-75nm; the range of in-plane optical path difference compensation value Ro-B of -B type compensation layer is: 106nm≤Ro-B≤126nm; -B type compensation The range of the optical path difference compensation value Rth-B in the thickness direction of the layer is: 71nm≤Rth-B≤91nm. For example, the in-plane optical path difference compensation value Ro+B of the +B type compensation layer can be about 27nm; the optical path difference compensation value Rth+B of the +B type compensation layer in the thickness direction can be about: -87nm; -B type The in-plane optical path difference compensation value Ro-B of the compensation layer may be about 116 nm; the optical path difference compensation value Rth-B of the -B type compensation layer in the thickness direction may be about 81 nm. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the range of the in-plane optical path difference compensation value Ro+A of the +A type compensation layer is: 115nm≤Ro+A≤135nm; the optical path difference compensation value of the +A type compensation layer in the thickness direction The range of the value Rth+A is: 52nm≤Rth+A≤72nm; the range of the in-plane optical path difference compensation value Ro+C of the +C type compensation layer is: 0nm≤Ro+C≤5nm; the range of the +C type compensation layer The range of the optical path difference compensation value Rth+C in the thickness direction is: -107nm≤Rth+C≤-67nm. For example, the in-plane optical path difference compensation value Ro+A of the +A type compensation layer can be about 125nm; the optical path difference compensation value Rth+A of the +A type compensation layer in the thickness direction can be about 62nm; the +C type compensation layer The in-plane optical path difference compensation value Ro+C may be about 0 nm; and the optical path difference compensation value Rth+C in the thickness direction of the +C type compensation layer may be about -97 nm. For another example, the in-plane optical path difference compensation value Ro+A of the +A-type compensation layer can be about 125nm; the optical path difference compensation value Rth+A of the +A-type compensation layer in the thickness direction can be about 62nm; +C-type compensation The in-plane optical path difference compensation value Ro+C of the layer may be about 0 nm; and the optical path difference compensation value Rth+C in the thickness direction of the +C type compensation layer may be about -78 nm. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the polarizing layer is easily hydrolyzed. In order to ensure the properties of the polarizing layer, support layers with high light transmittance, good water resistance and certain mechanical strength can be respectively arranged on both sides of the polarizing layer to carry out Protection, that is, the polarizer layer 23 can be protected by the first support layer 22 and the second support layer 24 in the polarizer.

In an exemplary embodiment, any one or more of the first support layer 22 and the second support layer 24 may include but not limited to adopt: Tri-cellulose acetate (Tri-cellulose Acetate, TAC) material, polyester Polyethylene terephthalate (PET) material, acrylic material, cyclo olefin polymer (Cyclo Olefin Polymer, COP) material, etc. For example, TAC can be no retardation cellulose triacetate (No retardation tac, NRT). Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, any one or more of the first support layer 22 and the second support layer 24 can be a material with HC (Hard Coding) surface treatment, which has relatively high hardness and water and oil repellency The higher HC layer can prevent the polarizer from being scratched and is easier to clean. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the material of the first supporting layer 22 and the material of the second supporting layer 24 may be different.

In an exemplary embodiment, the thickness of the first support layer 22 and the thickness of the second support layer 24 may be different.

For example, the first support layer 22 can be formed with PET material, the thickness of the first support layer 22 can be about 84 microns, and the second support layer 24 can be formed with NRT material, and the thickness of the second support layer 24 can be about 40 microns . Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the adhesive layer 26 may include but not limited to be formed by using pressure sensitive adhesive (Pressure Sensitive Adhesive, PSA) material. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the adhesive layer 26 may be a haze layer, and the haze layer may include: a pressure sensitive adhesive (PSA) and dispersed particles dispersed at least in the pressure sensitive adhesive. In this way, the adhesive layer 26 can disperse the propagation direction of the light while playing the role of adhering the film layers adjacent to it. For example, in the haze layer of any one or more of the second polarizer, the third polarizer and the fourth polarizer, a part of the dispersed particles can be dispersed in the pressure-sensitive adhesive, and another part of the dispersed particles can be dispersed in the pressure-sensitive adhesive. Sensitive adhesive surface, at this time, the haze of the polarizer includes: internal haze and surface haze. For example, in the haze layer of the first polarizer, all dispersed particles can be dispersed in the pressure-sensitive adhesive. At this time, the haze of the first polarizer refers to the internal haze. In this way, since the first polarizer is located in the second One displays the outer surface of the liquid crystal display panel, therefore, the frosted feeling of the display panel can be reduced and the user experience can be improved.

In an exemplary embodiment, the dispersed particles may have a diameter of about 1 micron to 10 microns. For example, the dispersed particles may be about 1 micron, 2 microns, 3 microns, 4 microns, 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, or 10 microns in diameter, among others. Here, the embodiments of the present disclosure do not limit this.

In one exemplary embodiment, the thickness of the adhesive layer 26 may be about 18 microns.

In an exemplary embodiment, the thickness of the release layer 27 may be about 38 microns.

In an exemplary embodiment, the release layer 27 may be formed of PET material.

In an exemplary embodiment, the protective layer 21 may have a thickness of about 50 microns.

In an 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. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the first liquid crystal panel may be a vertical electric field display panel, for example, a vertical alignment (Vertical Alignment, VA) display mode and the like. In this way, the alignment direction of the first liquid crystal panel can be 90 degrees, that is, the optical axis direction of the liquid crystal molecules in the first liquid crystal panel can be 90 degrees. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the second liquid crystal panel may be a horizontal electric field display panel, for example, an Advanced Super Dimension Switch (Advanced Super Dimension Switch, ADS) display mode or an In Plane Switching (In Plane Switching, IPS) display mode wait. In this way, the alignment direction of the second liquid crystal panel can be 0 degree, that is, the optical axis direction of the liquid crystal molecules in the first liquid crystal panel can be 0 degree. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the direction of the optical axes of the liquid crystal molecules in the first liquid crystal panel is perpendicular to the direction of the optical axes of the liquid crystal molecules in the second liquid crystal panel.

In an exemplary embodiment, the display panel further includes: an adhesive layer positioned between the second polarizer and the third polarizer. The bonding adhesive layer is configured to bond the second polarizer and the third polarizer together, so that the first liquid crystal panel and the second liquid crystal panel are bonded together. For example, the material for laminating the adhesive layer may include but not limited to: optical glue (Optically Clear Adhensive, OCA) or OCR (Optical Clear Resin, optically transparent resin) and the like. Here, the embodiments of the present disclosure do not limit this.

In addition, the display panel in the embodiments of the present disclosure may include other necessary components and structures besides the structures listed above, for example, components such as gate lines, data lines, pixel electrodes or common electrodes. Those skilled in the art can make corresponding designs and supplements according to the type of the display panel, which will not be repeated here.

The embodiment of the present disclosure also provides a display panel. FIG. 3 is a second structural schematic diagram of a display panel in an exemplary embodiment of the present disclosure. As shown in FIG. sheet 13, the third polarizer 14, the second liquid crystal panel 15 and the fourth polarizer 16; wherein,

The first polarizer 11, the second polarizer 13, the third polarizer 14 and the fourth polarizer 16 are all polarizers with an optical compensation layer;

The haze of the first polarizer 11 is smaller than the haze of the second polarizer 13, the haze of the second polarizer 13 is equal to the haze of the third polarizer 14, and the haze of the third polarizer 14 is greater than that of the fourth polarizer sheet haze;

The optical axis direction of the first polarizer 11 is parallel to the optical axis direction of the liquid crystal molecules of the first liquid crystal panel 12, the optical axis direction of the second polarizer 13 is parallel to the optical axis direction of the liquid crystal molecules of the second liquid crystal panel 15, and the third The optical axis direction of the 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 .

In an exemplary embodiment, the optical axis direction of the liquid crystal molecules in the first liquid crystal panel may be 90 degrees, the optical axis direction of the liquid crystal molecules in the second liquid crystal panel may be 0 degrees, and 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 can be 0 degrees, and the optical axis direction of the fourth polarizer can be 90 degrees.

In an exemplary embodiment, the haze of the first polarizer may be about 55%; the haze of the second polarizer may be about 80%; the haze of the third polarizer may be about 80%; and The haze of the quadruple polarizer may be about 42%.

The embodiment of the present disclosure also provides a display panel. FIG. 4 is a schematic diagram of a third structure of a display panel in an exemplary embodiment of the present disclosure. As shown in FIG. 4, the display panel may include: a first polarizer 11, a first liquid crystal panel 12, a second Polarizer 13, the third polarizer 14, the second liquid crystal panel 15 and the fourth polarizer 16; wherein,

The optical axis direction of the first polarizer 11 is parallel to the optical axis direction of the liquid crystal molecules of the second liquid crystal panel 15, the optical axis direction of the second polarizer 13 is parallel to the optical axis direction of the liquid crystal molecules of the first liquid crystal panel 12, and the third The optical axis direction of the 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 .

In an 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, and 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.

Take the 31.5UHD BD Cell product as an example in the following. The first liquid crystal panel uses positive wide-temperature liquid crystals with an alignment direction of 90 degrees; the second liquid crystal panel uses negative liquid crystals with an alignment direction of 0 degrees as an example. Through experiments The display panel provided by the embodiment of the present disclosure will be described.

Table 1 shows the experimental results of L0 brightness, L255 brightness and contrast ratio (CR) corresponding to different polarizers. Among them, the first kind of polarizer has no optical compensation layer, and the second kind of polarizer has a Z-type compensation layer. Polarizer, the third kind of polarizer is a polarizer with stacked +B type compensation layer and -B type compensation layer, and the fourth type of polarizer is a polarizer with stacked +A type compensation layer and +C type compensation layer polarizer.

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 L0 brightness of the display panel can be greatly reduced by about 70%. , while the brightness of L255 has only decreased by about 17%. Therefore, the contrast ratio of BD Cell can be greatly improved from 197,000 to 1.799 million (this experiment does not consider the problem of large-view role deviation and rainbow pattern), and can realize a high-contrast display panel .

the	第一种偏光片first polarizer	第二种偏光片second polarizer	第三种偏光片third polarizer	第四种偏光片The fourth polarizer
L0L0	0.00570.0057	0.00050.0005	0.00050.0005	0.00050.0005
L255L255	1122.91122.9	899.625899.625	913.53913.53	938.32938.32
CRCR	19.7万197,000	179.9万1.799 million	182.7万1.827 million	187.7万1.877 million

Table 1 L0 brightness, L255 brightness and contrast ratio (CR) corresponding to different polarizers

As shown in Table 1, comparing the experimental results of the first type of polarizer and the third type of polarizer, it can be found that after the third type of polarizer is installed in the display panel, the L0 brightness of the display panel can be greatly reduced, thus 0.0057 Ni The nit (nit) dropped to 0.0005 nits, while the brightness of L255 only dropped slightly, from 1122.9 nits to 913.53 nits, thus, the contrast of BD Cell could be greatly improved, from 197,000 to 1,827,000 (this experiment did not consider large viewing angle and rainbow patterns), and can realize a high-contrast display panel.

As shown in Table 1, comparing the experimental results of the first type of polarizer and the fourth type of polarizer, it can be found that after the fourth type of polarizer is installed in the display panel, the L0 brightness of the display panel can be greatly reduced, thus 0.0057 Ni The nits dropped to 0.0005 nits, while the brightness of L255 only dropped slightly, from 1122.9 nits to 938.32 nits, thus, the contrast of BD Cell can be greatly improved, from 197,000 to 1,877,000 (this experiment does not consider the role of big vision bias and rainbow patterns), and can achieve a high-contrast display panel.

From the above analysis, it can be seen that the contrast obtained by using a polarizer with an optical compensation layer in a display panel is much higher than that obtained by using a polarizer without an optical compensation layer in a display panel, and can reach over a million levels.

Fig. 5A is a schematic diagram of the improvement effect of the large-scale role deviation under the red screen, Fig. 5B is a schematic diagram of the improvement effect of the large-scale role deviation under the green screen, and Fig. 5C is a schematic diagram of the improvement effect of the large-scale role deviation under the blue screen, wherein each In the group comparison chart, the upper figure shows that a normal (Normal) polarizer is used in the display panel, that is, a polarizer without an optical compensation layer, and the lower left figure shows that a polarizer with an optical compensation layer is used in a display panel and matches O -mode, the figure on the right below shows that a polarizer with an optical compensation layer is used in the display panel and matches E-mode. Wherein, in the exemplary implementation of the present disclosure, when the working mode matches 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, and the first The optical axis direction of one polarizer is 0 degrees, the optical axis direction of the second polarizer may 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 the present disclosure, in the working mode matching E-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, and the first The optical axis direction of the 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.

The problem of large-view role deviation is essentially manifested as light leakage under oblique viewing angles, and different color mixing causes different degrees of color drift in red, green, and blue screens. As shown in Figure 5A to Figure 5C, compared with the color shift effect obtained by using a polarizer without an optical compensation layer, after using a polarizer with an optical compensation layer, by compensating the optical path difference of polarized light, suppression can be achieved. The effect of light leakage can improve the problem of color cast. In addition, the color shift improvement effect of matching O-mode is better than that of E-mode color shift improvement.

The mechanism of the rainbow pattern 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 block moves with the viewing angle, thereby forming a periodic rainbow pattern. After testing, it is found that the haze treatment of polarized light changes the collimation of the optical path, although it will slightly increase the brightness of the side viewing angle and reduce the contrast a little, but the use of high haze polarizers can obviously suppress the rainbow pattern.

As shown in FIG. 6, compared with the control display panel obtained by using a polarizer without an optical compensation layer, the example of the present disclosure is only used in the display panel without taking into account the improvement of the large viewing angle cast and the rainbow pattern. The polarizer with an optical compensation layer provided in the exemplary embodiment can increase the contrast ratio from 197,000 to 1.799 million; compared with a display panel obtained by using a polarizer without an optical compensation layer, the exemplary embodiment of the present disclosure The display panel provided in , by using a polarizer with an optical compensation layer, a haze-treated polarizer, and combining the optical axis direction of the polarizer with the optical axis direction of the liquid crystal molecules, can achieve a large viewing angle while taking into account the improvement In the case of color cast and rainbow pattern problems, the contrast ratio is increased from 197,000 to 991,000. Therefore, the display panel provided in the exemplary embodiments of the present disclosure can achieve a contrast ratio of one million while taking into account the improvement of large-view angle deviation and the obvious suppression of rainbow patterns.

An embodiment of the present disclosure also provides a display device. As shown in FIG. 7 , the display device may include: the display panel in one or more embodiments above, wherein the first liquid crystal panel 12 may include: a first The array substrate 121 and the first counter substrate 122, and the first liquid crystal layer 123 arranged between the first array substrate 121 and the first counter substrate 122; the second liquid crystal panel 15 may include: a second array substrate oppositely arranged 151 and the second opposite substrate 152 , and the second liquid crystal layer 153 disposed between the second array substrate 151 and the second opposite substrate 152 .

In an 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.

In an exemplary embodiment, as shown in FIG. 7 , the display device may further include: a backlight module 31 disposed on the non-display side of the display panel and configured to provide an initial backlight to the second liquid crystal panel 15 . The second liquid crystal panel 15 may be called a sub display panel (Sub Cell), a dimming panel or a light control panel. The second liquid crystal panel 15 is configured to adjust the initial backlight provided by the backlight module 30 and provide adjusted backlight to the first liquid crystal panel 12 . The first liquid crystal panel 12 may be called a main display panel (Main Cell). The first liquid crystal panel 12 is configured to receive the adjusted backlight and display different grayscale colors. In this way, through the deflection angle of the liquid crystal molecules in the liquid crystal layer of the first liquid crystal panel, the brightness of the backlight provided to the second liquid crystal panel can be controlled regionally.

In an exemplary embodiment, the first liquid crystal panel and the second liquid crystal panel may have the same appearance size and function size. For example, the shape and size of the first liquid crystal panel and the second liquid crystal panel are the same, and the shape and size of the display area in the second liquid crystal panel and the light control area in the first liquid crystal panel are all the same, so that the alignment can be bonded to the second liquid crystal panel. After the first liquid crystal panel and the second liquid crystal panel, the light control area may correspond to the display area, so that the backlight emitted by the backlight module is provided to the display area after being regulated by the light control area. For example, the display area in the first liquid crystal panel includes: a plurality of display pixels; the light control area in the second liquid crystal panel includes: a plurality of light control pixels.

In an exemplary embodiment, the first liquid crystal panel may be a liquid crystal panel provided with a color filter layer. The second liquid crystal panel may be a black and white liquid crystal panel without a color filter layer.

In an exemplary embodiment, as shown in FIG. 7 , the first liquid crystal panel 12 may further include: a color filter layer 124 and a black matrix (not shown in the figure) arranged in the same layer. For example, the color filter layer 124 may be disposed on the side of the first array substrate 121 close to the first liquid crystal layer 123, or the color filter layer 124 may be disposed on the side of the first opposite substrate 122 close to the first liquid crystal layer 123. . Here, the embodiments of the present disclosure do not limit this.

In an 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 The light of the color filter unit is filtered to filter out the first color light; the second color filter unit is configured to filter the light passing through the second color filter unit to filter out the second color light; the third color filter unit is configured to The light passing through the third color filter unit is filtered to filter out the third color light. For example, the color filter layer may include: periodically arranged red (R) color filter units, green (G) color filter units, and blue (B) color filter units, or periodically arranged red color filter units, green color filter units, and green color filter units. Film unit, blue color film unit and white (W) color film unit. Here, the embodiments of the present disclosure do not limit this.

In an exemplary embodiment, the display device may include, but is not limited to, any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, or a navigator. Here, the embodiment of the present disclosure does not limit the type of the display device. Other essential components of the display device should be understood by those of ordinary skill in the art, and will not be repeated here, nor should they be used as limitations on the present disclosure.

The above description of the display device embodiment is similar to the above description of the display panel embodiment, and has similar beneficial effects as the display panel embodiment. For the technical details not disclosed in the embodiments of the display device of the present disclosure, those skilled in the art should refer to the descriptions in the embodiments of the display panel of the present disclosure to understand, and details are not repeated here.

Although the embodiments disclosed in the present disclosure are as above, the above-mentioned content is only an embodiment adopted to facilitate understanding of the present disclosure, and is not intended to limit the present disclosure. Anyone skilled in the art to which this disclosure belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this disclosure, but the scope of patent protection of this disclosure must still be The scope defined by the appended claims shall prevail.

Claims

A display panel, comprising: a first polarizer, a first liquid crystal panel, a second polarizer, a third polarizer, a second liquid crystal panel and a fourth polarizer stacked in sequence; wherein,

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;

The haze of the first polarizer is smaller than the haze of the second polarizer, and the haze of the third polarizer is greater than the haze of the fourth polarizer;

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, and the optical axis direction of the second polarizer is parallel to the first The liquid crystal panel is parallel to the optical axis direction of the liquid crystal molecules of the other of 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 fourth polarizer The optical axis direction of the sheet is parallel to the optical axis direction of the first polarizer.
The display panel according to claim 1, wherein the haze of the first polarizer is greater than the haze of the fourth polarizer.
The display panel according to claim 1, wherein the haze of the second polarizer is equal to the haze of the third polarizer.
The display panel according to 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 The ratio 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 haze of the second polarizer and the third polarizer are The ratio between the haze of the second 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 haze of the third polarizer The ratio to the haze of the fourth polarizer is 1.8 to 2.
The display panel according to 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 The haze of the fourth polarizer is 30% to 50%.
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%.
The display panel according to claim 1, wherein the polarizer with an optical compensation layer comprises: an optical compensation layer, and the optical compensation layer comprises: one compensation layer or two compensation layers, and the one compensation layer It is a Z-type compensation layer, and the two compensation layers 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.
The display panel according to claim 7, wherein the range of the in-plane optical path difference compensation value RoZ of the Z-type compensation layer is: 220nm≤RoZ≤320nm; the optical path difference in the thickness direction of the Z-type compensation layer The range of the compensation value RthZ is: 0nm≤RoZ≤1nm.
The display panel according to claim 8, wherein the in-plane optical path difference compensation value RoZ of the Z-type compensation layer is 270 nm, and the optical path difference compensation value RthZ of the Z-type compensation layer in the thickness direction is 0.5 nm .
The display panel according to claim 7, wherein the range of the in-plane optical path difference compensation value Ro+B of the +B-type compensation layer is: 14nm≤Ro+B≤34nm; the range of the +B-type compensation layer The range of the optical path difference compensation value Rth+B in the thickness direction is: -100nm≤Rth+B≤-75nm; the range of the in-plane optical path difference compensation value Ro-B of the -B type compensation layer is: 106nm≤Ro -B≤126nm; the range of the optical path difference compensation value Rth-B in the thickness direction of the -B type compensation layer is: 71nm≤Rth-B≤91nm.
The display panel according to claim 10, wherein the in-plane optical path difference compensation value Ro+B of the +B type compensation layer is 27 nm; the optical path difference compensation value Rth in the thickness direction of the +B type compensation layer +B is: -87nm; the in-plane optical path difference compensation value Ro-B of the -B type compensation layer is: 116nm; the optical path difference compensation value Rth-B in the thickness direction of the -B type compensation layer is: 81nm.
The display panel according to claim 7, wherein the range of the in-plane optical path difference compensation value Ro+A of the +A type compensation layer is: 115nm≤Ro+A≤135nm; The range of the optical path difference compensation value Rth+A in the thickness direction is: 52nm≤Rth+A≤72nm; the range of the in-plane optical path difference compensation value Ro+C of the +C type compensation layer is: 0nm≤Ro+C ≤5nm; the range of the optical path difference compensation value Rth+C in the thickness direction of the +C type compensation layer is: -107nm≤Rth+C≤-67nm.
The display panel according to claim 12, wherein the in-plane optical path difference compensation value Ro+A of the +A-type compensation layer is 125 nm; the optical path difference compensation value Rth of the +A-type compensation layer in the thickness direction +A is 62nm; the in-plane optical path difference compensation value Ro+C of the +C type compensation layer is 0nm; the optical path difference compensation value Rth+C in the thickness direction of the +C type compensation layer is -97nm.
The display panel according to claim 12, wherein the in-plane optical path difference compensation value Ro+A of the +A-type compensation layer is 125 nm; the optical path difference compensation value Rth of the +A-type compensation layer in the thickness direction +A is 62nm; the in-plane optical path difference compensation value Ro+C of the +C type compensation layer is 0nm; the optical path difference compensation value Rth+C in the thickness direction of the +C type compensation layer is -78nm.
The display panel according to claim 12, wherein, in the thickness direction of the display panel, the polarizer with an optical compensation layer comprises: a protective layer, a first supporting layer, a polarizing layer, a second Support layer, optical compensation layer, adhesive layer and release layer.
The display panel according to claim 15, wherein the adhesive layer is a haze layer, and the haze layer comprises: a pressure-sensitive adhesive and dispersed particles, and the dispersed particles are at least dispersed in the pressure-sensitive adhesive.
The display panel according to claim 1, wherein 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 display panel according to claim 1 or 17, 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.
The display panel according to claim 18, 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, and the first The optical axis direction of the 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.
The display panel according to claim 18, 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, and the first The optical axis direction of the 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 degree.
A display device, comprising: the display panel according to any one of claims 1 to 20, wherein the first liquid crystal panel comprises: a first array substrate and a first counter substrate arranged oppositely, and arranged on the The first liquid crystal layer between the first array substrate and the first counter substrate; the second liquid crystal panel includes: a second array substrate and a second counter substrate oppositely arranged, and a A second liquid crystal layer between the array substrate and the second opposite substrate.
The display device according to claim 21, 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 first The optical axis direction of the 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 degree; 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 The degree is 42%.