CN113867042A

CN113867042A - Display panel and display device

Info

Publication number: CN113867042A
Application number: CN202111166588.4A
Authority: CN
Inventors: 王海亮; 陈木清; 陈建友; 李雅缨; 杨雁; 周婷; 李俊谊
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2021-12-31
Anticipated expiration: 2041-09-30
Also published as: CN113867042B

Abstract

The embodiment of the application provides a display panel and a display device, wherein the display panel comprises a first display area and a second display area surrounding at least part of the first display area, the light passing rate of the first display area is greater than that of the second display area, and the first display area comprises a first substrate, a first liquid crystal layer, a connecting layer and a second substrate; the first display area comprises a first sub-area and a second sub-area, the first sub-area is provided with a first color resistance layer and a first support column, the first color resistance layer is located between the connecting layer and the second substrate, and the first support column is located between the connecting layer and the first substrate; the vertical distance between the first surface of the connecting layer in the second sub-area and the second surface of the first substrate is greater than the vertical distance between the first surface of the connecting layer in the first sub-area and the second surface of the first substrate, the first surface is the surface of the connecting layer facing the first substrate, and the second surface is the light-emitting surface or the backlight surface of the first substrate. The embodiment of the application can improve the image quality shot by the camera under the screen.

Description

Display panel and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a display panel and a display device.

Background

With the development of display technologies, high-screen-ratio display devices are increasingly favored by consumers. To achieve a higher screen ratio, the display device usually sets a Camera Under Panel (CUP) in the display area of the display Panel. However, the inventor of the present application finds that, when the display panel is powered on, the quality of the image shot by the screen camera is poor.

Disclosure of Invention

The embodiment of the application provides a display panel and a display device, and the problem that the image quality shot by a camera under a screen is poor when the display panel is electrified can be solved.

In a first aspect, an embodiment of the present application provides a display panel, where the display panel includes a first display area and a second display area surrounding at least a part of the first display area, a light transmittance of the first display area is greater than a light transmittance of the second display area, and the first display area includes a first substrate, a first liquid crystal layer, a connection layer, and a second substrate that are sequentially stacked;

the first display area comprises a first sub-area and a second sub-area, the first sub-area is provided with a first color resistance layer and first support columns, the second sub-area is not provided with the first color resistance layer and the first support columns, the first color resistance layer is located between the connecting layer and the second substrate, and the first support columns are located between the connecting layer and the first substrate;

a first vertical distance between the first surface of the connecting layer in the second sub-area and the second surface of the first substrate is larger than a second vertical distance between the first surface of the connecting layer in the first sub-area and the second surface of the first substrate, the first surface is a surface of the connecting layer facing the first substrate, and the second surface is a light-emitting surface or a backlight surface of the first substrate.

In a second aspect, embodiments of the present application provide a display device, which includes the display panel provided in the first aspect.

The display panel comprises a first display area and a second display area surrounding at least part of the first display area, wherein the light passing rate of the first display area is greater than that of the second display area, and the first display area comprises a first substrate, a first liquid crystal layer, a connecting layer and a second substrate which are sequentially stacked; the first display area comprises a first sub-area and a second sub-area, the first sub-area is provided with a first color resistance layer and first support columns, the second sub-area is not provided with the first color resistance layer and the first support columns, the first color resistance layer is located between the connecting layer and the second substrate, and the first support columns are located between the connecting layer and the first substrate; a first vertical distance between the first surface of the connecting layer in the second sub-area and the second surface of the first substrate is larger than a second vertical distance between the first surface of the connecting layer in the first sub-area and the second surface of the first substrate, the first surface is a surface of the connecting layer facing the first substrate, and the second surface is a light-emitting surface or a backlight surface of the first substrate. The inventor of the application finds that the diffraction phenomenon of light of the liquid crystal layer in the first display area can be improved by increasing the thickness of the liquid crystal layer in the first display area, so that the imaging resolution of the camera under the screen can be improved, the photographing effect of starburst can be weakened, and the image quality shot by the camera under the screen can be improved. Based on the above finding, in the embodiment of the application, by increasing the first vertical distance between the first surface of the connection layer in the second sub-area of the first display area and the second surface of the first substrate, that is, increasing the thickness of the liquid crystal layer in the second sub-area of the first display area, the imaging resolution of the off-screen camera is improved, the "starburst" photographing effect is weakened, and the image quality photographed by the off-screen camera is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of the deflection of liquid crystal molecules when the display panel is powered on;

fig. 2 is a schematic top view of a display panel according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view of the display panel shown in FIG. 2 along line A-A';

fig. 4 is a schematic top view of a display panel according to an embodiment of the present disclosure;

fig. 5 is a schematic partial top view of a display panel according to an embodiment of the present disclosure;

FIG. 6 is a schematic cross-sectional view of the display panel shown in FIG. 2 taken along line B-B';

fig. 7 is a schematic partial top view of a display panel according to an embodiment of the present disclosure;

FIG. 8 is another cross-sectional view of the display panel shown in FIG. 2 taken along line B-B';

FIG. 9 is a schematic partial cross-sectional view of the display panel shown in FIG. 2 taken along line B-B';

fig. 10 is a schematic partial top view of a display panel according to an embodiment of the present disclosure;

FIG. 11 is a schematic partial cross-sectional view of the display panel shown in FIG. 2 along line B-B';

FIG. 12 is a schematic partial cross-sectional view of the display panel shown in FIG. 2 taken along line B-B';

fig. 13 is a schematic partial top view of a display panel according to an embodiment of the present disclosure;

fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the corresponding claims (the claimed subject matter) and their equivalents. It should be noted that the embodiments provided in the embodiments of the present application can be combined with each other without contradiction.

Before explaining the technical solutions provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically explains the problems existing in the prior art:

as described above, the inventors of the present application have found that, in the related art, there is a problem that when the display panel is powered on, an image captured by the off-screen camera has poor quality.

In order to solve the problem that the quality of an image shot by an off-screen camera is poor when a display panel is powered on, the inventor of the present application firstly carries out research and analysis on the root cause causing the above technical problem, and the specific research and analysis processes are as follows:

the inventors of the present application have found that, as shown in fig. 1, when the display panel is energized, liquid crystal molecules 101 in the display panel are deflected. However, under the influence of the electric field distribution, the liquid crystal molecules 101 in different regions (or different positions) have different deflection directions and/or angles, such as the liquid crystal molecules 101 in the region a in fig. 1 are shifted to the "upper right", the liquid crystal molecules 101 in the region B are shifted to the "lower right", the liquid crystal molecules 101 in the region C are shifted to the "lower left", and the liquid crystal molecules 101 in the region D are shifted to the "upper left". Thus, since the liquid crystal molecules at different positions have an angular difference, a plurality of grating structures (slits) are formed between the groups of liquid crystal molecules having an angular difference on the display panel. The external light can diffract through the grating structure on the display panel, the imaging resolution of the camera under the screen is affected, the starburst photographing effect is brought, and therefore the quality of the image shot by the camera under the screen is poor.

Therefore, based on the findings of the above-described root, the inventors of the present application considered or may reduce the angle difference between the liquid crystal molecules at different positions to reduce or weaken the grating structure formed between the liquid crystal molecules, thereby improving the diffraction phenomenon of light.

For this reason, the inventors of the present application further found through a large number of experiments that by increasing the thickness of the liquid crystal layer in the display panel, the angle difference between liquid crystal molecules at different positions in the liquid crystal layer can be reduced, and the grating structure formed between the liquid crystal molecules can be reduced or weakened. Therefore, the grating structure on the display panel is reduced or weakened, so that the diffraction phenomenon of light of the liquid crystal layer can be improved, the imaging resolution of the camera under the screen is improved, the photographing effect of starburst is weakened, and the image quality photographed by the camera under the screen is improved.

In view of the above research of the inventor, the embodiments of the present application provide a display panel and a display device, which can solve the technical problem existing in the related art that the quality of an image captured by an off-screen camera when the display panel is powered on is poor.

The technical idea of the embodiment of the application is as follows: for a first display area of a display panel corresponding to the camera under the screen, the imaging resolution of the camera under the screen is improved and the photographing effect of the starburst is weakened by increasing the first vertical distance between the first surface of the connecting layer in the second sub-area of the first display area and the second surface of the first substrate, namely increasing the thickness of the liquid crystal layer in the second sub-area of the first display area, so that the image quality shot by the camera under the screen is improved.

The following first describes a display panel provided in an embodiment of the present application.

Fig. 2 is a schematic top view of a display panel according to an embodiment of the present disclosure. FIG. 3 is a cross-sectional view of the display panel shown in FIG. 2 along line A-A'. As shown in fig. 2, the display panel 20 provided in the embodiment of the present application includes a first display area AA1 and a second display area AA2 surrounding at least a portion of the first display area AA 1. The first display area AA1 is an area corresponding to the off-screen camera CUP, and therefore the first display area AA1 may also be referred to as a CUP area. It is easy to understand that, in order to ensure the quality of the image shot by the camera under the screen, the light passing rate of the first display area AA1 is greater than that of the second display area AA2, so as to ensure that more external light can enter the camera under the screen through the first display area AA 1.

As shown in fig. 3, the first display area AA1 includes a first substrate 301, a first liquid crystal layer 302, a connection layer 303, and a second substrate 304, which are sequentially stacked. In practical applications, the first substrate 301 may be referred to as an array substrate, and a combination of the connection layer 303, the second substrate 304 and the first color resist layer 305 may be collectively referred to as a color filter substrate 300, but this is only a name of the embodiment of the present disclosure, and it is not meant that the color filter substrate 300 necessarily includes the connection layer 303, the second substrate 304 and the first color resist layer 305, and the color filter substrate 300 may also include only one or two of the connection layer 303, the second substrate 304 and the first color resist layer 305, and may further include other film layers besides the connection layer 303, the second substrate 304 and the first color resist layer 305, which is not limited in the embodiment of the present disclosure. Illustratively, the connection layer 303 may include a transparent optical glue layer. In the embodiment of the present application, the first display area AA1 may include a first sub-area Q1 and a second sub-area Q2. The first sub-region Q1 is provided with the first color-resist layer 305 and the first support column 306, and the second sub-region Q2 is not provided with the first color-resist layer 305 and the first support column 306. The advantages of this arrangement are: the first display area AA1 can display color pictures through the first sub-area Q1 provided with the first color resistance layer 305, the light passing rate of the first display area AA1 can be increased through the second sub-area Q2 not provided with the first color resistance layer 305, so that more external light can enter the camera under the screen through the first display area AA1, and the quality of images shot by the camera under the screen is improved. With continued reference to fig. 3, the first color resist layer 305 is located between the connection layer 303 and the second substrate 304, and the first support pillar 306 is located between the connection layer 303 and the first substrate 301.

It is to be noted that, in order to reduce the diffraction degree of the first display area AA1 or the second sub-area Q2 to the external light, a first vertical distance h1 between a first surface (surface a shown in fig. 3) of the connection layer 303 in the second sub-area Q2 and a second surface (surface b shown in fig. 3) of the first substrate 301 is greater than a second vertical distance h2 between the first surface of the connection layer 303 in the first sub-area Q1 and the second surface of the first substrate 301, the first surface of the connection layer 303 is a surface of the connection layer 303 facing the first substrate 301, and the second surface of the first substrate 301 is a light emitting surface or a backlight surface of the first substrate 301. The second surface of the first substrate 301 in fig. 3 is described by taking the light emitting surface of the first substrate 301 as an example, but the second surface of the first substrate 301 in fig. 3 may be a backlight surface (surface c shown in fig. 3) of the first substrate 301.

Since the first liquid crystal layer 302 is sandwiched between the first surface of the connection layer 303 and the second surface of the first substrate 301, the thickness of the first liquid crystal layer 302 in the second sub-region Q2 is made larger than that of the first liquid crystal layer 302 in the first sub-region Q1 by adjusting the first vertical distance h1 to be larger than the second vertical distance h2, that is, by increasing the thickness of the first liquid crystal layer 302 in the second sub-region Q2. In this way, since the thickness of the first liquid crystal layer 302 in the second sub-region Q2 is increased, the angle difference between the liquid crystal molecules at different positions of the first liquid crystal layer 302 in the second sub-region Q2 is reduced, and the grating structure formed between the liquid crystal molecules is reduced or weakened, so that the diffraction phenomenon of the first liquid crystal layer 302 in the second sub-region Q2 on light is improved, the imaging resolution of the off-screen camera is improved, the "starburst" photographing effect is weakened, and the image quality photographed by the off-screen camera is improved.

The inventor of the present application further finds that, as the thickness of the first liquid crystal layer 302 in the second sub-region Q2 increases, when the first supporting pillars 306 with the original distribution density act as a support inside the display panel 20, the first display region AA1(CUP region) of the display panel 20 is greatly deformed in the thickness direction, which is not favorable for the first liquid crystal layer 302 in the second sub-region Q2 to maintain the predetermined thickness. In order to further solve the above technical problem found by the inventors of the present application, the embodiment of the present application proposes to increase the distribution density of the first support pillars 306 in the first display area AA1 to increase the supporting capacity of the first support pillars 306 in the first display area AA 1.

Specifically, as shown in fig. 4, in some embodiments of the present application, optionally, the second display area AA2 may be provided with second support pillars 401, and the distribution density of the first support pillars 306 in the first display area AA1 is greater than the distribution density of the second support pillars 401 in the second display area AA 2.

In some specific examples, first substrate 301, connection layer 303, and second substrate 304 may extend to second display area AA 2. The second display area AA2 may include a second liquid crystal layer (not shown in the drawings) interposed between the first substrate 301 and the connection layer 303. The second support column 401 may be positioned in the second liquid crystal layer, i.e., between the first substrate 301 and the connection layer 303 at the second display area AA 2.

In this way, by increasing the distribution density of the first support pillars 306 in the first sub-area AA1, the pressure to be shared by each first support pillar 306 is reduced, so that the supporting capability of the first support pillars 306 in the first sub-area AA1 is increased, the deformation amount of the first sub-area AA1 in the thickness direction is reduced, and the first liquid crystal layer 302 in the second sub-area Q2 is beneficial to maintain a predetermined thickness.

As shown in fig. 5 and 6, according to some embodiments of the present application, optionally, the first sub-region Q1 is adjacent to the second sub-region Q2 in the first edge region s1, the first edge region s1 is provided with a black matrix 501, and the black matrix 501 is located between the connection layer 303 and the second substrate 304. It should be noted that when the first sub-region Q1 and the second sub-region Q2 are arranged in a staggered manner, the first edge region s1 of the first sub-region Q1 may be located on the first side of the first sub-region Q1, or may be located on the second side of the first sub-region Q1. The first side is a side on which the first second sub-region Q2 adjacent to the first sub-region Q1 is located, and the second side is a side on which the second sub-region Q2 adjacent to the first sub-region Q1 is located.

It is noted that the orthographic projection of the first support post 306 on the second substrate 304 overlaps with the orthographic projection of the black matrix 501 on the second substrate 304. Illustratively, the orthographic projection of the black matrix 501 on the second substrate 304 completely covers the orthographic projection of the first support column 306 on the second substrate 304.

Because the black matrix 501 is opaque, at least a part of the first support column 306 is disposed in the opaque region where the black matrix 501 is located, so that the area of the first support column 306 occupying the transparent region in the first display region AA1 can be reduced, the light passing rate of the first display region AA1 is increased, and the quality of images shot by the camera under the screen is improved.

With continued reference to fig. 6, according to some embodiments of the present application, optionally, the first color resistance layer 305 may include color resistance units 305a of multiple colors, and adjacent color resistance units 305a may be different colors. For example, the adjacent color resistance units 305a may be a red color resistance unit and a green color resistance unit, RG or GR; the adjacent color resistance units 305a may be a red color resistance unit and a blue color resistance unit, RB or BR for short; the adjacent color resistance units 305a may be a green color resistance unit and a blue color resistance unit, which are abbreviated as GB or BG. It should be noted that, for one color resistance unit 305a, the color resistance unit 305a may be adjacent to two color resistance units 305a, and the two color resistance units 305a may have different colors, i.e., RGB is formed. It is noted that the black matrix 501 may be located at the boundary between the adjacent color-resisting units 305a, and the orthographic projection of the black matrix 501 on the second substrate 304 may partially overlap the orthographic projection of the first color-resisting layer 305 on the second substrate 304. In other words, the black matrix 501 may extend to the boundary between the adjacent color-resistance units 305 a. Moreover, in the thickness direction of the display panel 20, the thickness of the black matrix 501 may be smaller than the thickness of the first color resist layer 305, that is, at least a portion of the black matrix 501 may be located between the first color resist layer 305 and the second substrate 304.

As such, since the black matrix 501 extends to the boundary between the adjacent color-resisting units 305a, the crosstalk phenomenon between the lights of different colors in the adjacent color-resisting units 305a can be reduced or even eliminated.

As shown in fig. 7, according to some embodiments of the present disclosure, a minimum straight-line distance L between an edge s of the orthographic projection of the first support pillar 306 on the black matrix 501 and the second edge s2 of the black matrix 501 may optionally range from 2 micrometers to 10 micrometers. The second edge s2 of the black matrix 501 may be an edge of the black matrix 501 close to the second sub-region Q2.

The minimum straight-line distance L between the edge s of the orthographic projection of the first support column 306 on the black matrix 501 and the second edge s2 of the black matrix 501 in the embodiment of the present application takes the above value range, mainly because: after a lot of experiments, the inventor of the present application verifies that when the minimum straight-line distance L is less than 2 microns, once the first support pillar 306 is displaced, the first support pillar 306 slides to the second sub-region Q2, so as to reduce the light passing rate of the second sub-region Q2; when the minimum linear distance L is greater than 10 μm, the orthographic projection of the first support pillar 306 on the first substrate at least partially overlaps with the orthographic projection of the first color resist layer 305 on the first substrate, which affects the quality of the picture displayed by the CUP region. And when the minimum linear distance L ranges from 2 micrometers to 10 micrometers, the first support column 306 is prevented from sliding to the second sub-region Q2, and the quality of the picture displayed in the CUP region can be ensured.

The following describes the display panel 20 provided in the embodiment of the present application in detail with reference to specific examples shown in fig. 8, 9, 10, 11, and 12.

As shown in fig. 8, according to some embodiments of the present application, optionally, the first support column 306 may include a first sub-support column 3061, the first sub-support column 3061 extending along a first direction, the first direction including a thickness direction (a Z direction as shown in fig. 8) of the display panel 20. The height of the first sub-support post 3061 in the first direction is greater than or equal to a second vertical distance h2, which is the vertical distance between the first surface of the connection layer 303 in the first sub-region Q1 and the second surface of the first substrate 301, h 2. Here, a case where the height of the first subsidiary support post 3061 in the first direction is greater than the second vertical distance h2 is explained. It is easily understood that when the first sub support post 3061 is placed within the display panel 20, the first sub support post 3061 may be compressed in the first direction to some extent, so the height of the first sub support post 3061 before being uncompressed may be greater than the second vertical distance h2, i.e., the height of the first sub support post 3061 before being uncompressed may be greater than the thickness of the first liquid crystal layer 302 in the first sub region Q1. Of course, regardless of compression, the height of the first sub-support post 3061 in the first direction may also be equal to the second vertical distance h 2.

According to some embodiments of the present disclosure, optionally, the height of the first sub-support post 3061 in the first direction may range from 2.8 micrometers to 3.2 micrometers, for example, the height of the first sub-support post 3061 in the first direction may be 3 micrometers. At present, the height of a support pillar prepared by the existing process is about 3 micrometers, that is, the first sub-support pillar 3061 in the embodiment of the present application can be prepared based on the existing process, and a process route does not need to be changed, which is beneficial to reducing the production cost.

In some embodiments according to the present application, the first sub-support post 3061 may optionally be shaped as a square frustum, circular truncated cone, or other shape. The bottom of the first sub-support post 3061 may be connected with the connection layer 303, and the top of the first sub-support post 3061 may be connected with the second substrate 304. When the first sub-support post 3061 is a square frustum, an orthogonal projection of the bottom of the first sub-support post 3061 on the second substrate may be a square, and a side length of the square may range from 7 micrometers to 10 micrometers. When the first sub-support post 3061 is a circular truncated cone, an orthogonal projection of the bottom of the first sub-support post 3061 on the second substrate may be circular, and a diameter of the circular shape may range from 7 micrometers to 10 micrometers.

With continued reference to fig. 8, in some embodiments according to the present disclosure, the first vertical distance h1 may optionally range from 3.6 microns to 4 microns. That is, the thickness of the first liquid crystal layer 302 in the second sub-region Q2 in the first direction may range from 3.6 micrometers to 4 micrometers. And the value range of the second vertical distance h2 (i.e. the thickness of the first liquid crystal layer 302 in the first sub-region Q1 in the first direction) may include 2.8 micrometers to 3.2 micrometers, for example. For easy understanding, please refer to fig. 3 and 8, in which fig. 3 is a schematic cross-sectional view taken along line a-a 'of fig. 2, and fig. 8 is a schematic cross-sectional view taken along line B-B' of fig. 2, and line a-a 'is perpendicular to line B-B'. As can be seen from fig. 3 and 8, the thickness of the first liquid crystal layer 302 in the second sub-region Q2 in the first direction is greater than the thickness of the first liquid crystal layer 302 in the first sub-region Q1 in the first direction.

Therefore, by increasing the thickness of the first liquid crystal layer 302 in the second sub-region Q2, the angle difference between the liquid crystal molecules at different positions of the first liquid crystal layer 302 in the second sub-region Q2 is reduced, and the grating structure formed between the liquid crystal molecules is reduced or weakened, so that the diffraction phenomenon of the first liquid crystal layer 302 in the second sub-region Q2 to light is improved, the imaging resolution of the camera under the screen is improved, the photographing effect of the starburst is weakened, and the image quality photographed by the camera under the screen is improved.

Unlike the embodiment shown in fig. 8, as shown in fig. 9, according to some embodiments of the present application, the display panel 20 may optionally further include a boss cooperating with the support post. Specifically, the first support column 306 may include a second sub-support column 3062, and the second sub-support column 3062 may extend in a first direction, which may include a thickness direction (a Z direction as shown in fig. 9) of the display panel 20. The display panel 20 may further include bosses 801, and the bosses 801 correspond to the second sub-support posts 3062 one to one. The boss 801 may be located between the second sub-support post 3062 and the first substrate 301, i.e., the boss 801 may be located "below" the second sub-support post 3062, i.e., the side of the second sub-support post 3062 facing the first substrate 301. The orthographic projection of the boss 801 on the first substrate 301 at least partially overlaps the orthographic projection of the second sub-support post 3062 on the first substrate 301, thereby achieving the alignment of the boss 801 with its corresponding second sub-support post 3062. In some specific examples, an orthographic projection of the boss 801 on the first substrate 301 may cover an orthographic projection of the second sub-support post 3062 on the first substrate 301.

In the embodiment shown in fig. 9, the second sub-support post 3062 and the corresponding boss 801 form a support unit 802, and the height of the support unit 802 in the first direction is greater than or equal to the second perpendicular distance h 2. Here, it should be noted that the case that the height of the supporting unit 802 in the first direction is greater than or equal to the second vertical distance h2 is similar to the case that the height of the first sub-supporting column in the first direction is greater than the second vertical distance h2, and is not described herein again.

According to some embodiments of the present application, optionally, the height of the second sub-support post 3062 in the first direction may range from 2.4 microns to 2.8 microns. Optionally, the height of the boss 801 in the first direction may range from 1.2 microns to 1.6 microns.

It is easily understood that the height of the supporting unit 802 in the first direction may be the sum of the heights of the second sub-supporting columns 3062 and the bosses 801 in the first direction, and the value range of the supporting unit 802 may include 3.6 micrometers to 4.4 micrometers. That is, the second vertical distance h2 (i.e., the thickness of the first liquid crystal layer 302 in the first sub-region Q1 in the first direction) may have a value ranging from 3.6 micrometers to 4.4 micrometers, for example. Accordingly, since the height of the supports (the supports are changed to the supporting units 802 by the second sub-supporting columns 3062) in the first liquid crystal layer 302 is increased due to the increase of the bosses 801, the thickness of the first liquid crystal layer 302 in the first direction in the first sub-region Q1 and the thickness of the first liquid crystal layer 302 in the first direction in the second sub-region Q2 can both be set thicker. Illustratively, for example, the first vertical distance h1 (the thickness of the first liquid crystal layer 302 in the second sub-region Q2 in the first direction) may have a value ranging from 4.7 micrometers to 5.1 micrometers.

In this way, by increasing the bosses 801 corresponding to the second sub-support posts 3062, the heights of the supports in the first liquid crystal layer 302 are increased, so that the thicknesses of the first liquid crystal layer 302 in the second sub-region Q2 in the first direction can be set thicker, the angle difference between the liquid crystal molecules at different positions of the first liquid crystal layer 302 in the second sub-region Q2 can be further reduced, the grating structure formed between the liquid crystal molecules is reduced or weakened, the diffraction phenomenon of the first liquid crystal layer 302 in the second sub-region Q2 on light is improved, the imaging resolution of the under-screen camera is improved, the photographing effect of the starburst is weakened, and the image quality of the under-screen camera is improved.

According to some embodiments of the present application, optionally, the height of the second sub support post 3062 in the first direction may take the same height as the height of the first sub support post 3061 in the first direction in the embodiment shown in fig. 8. Specifically, the height of the second sub-support post 3062 in the first direction may range from 2.8 microns to 3.2 microns. The height of the mesa 801 in the first direction may range from 1.2 microns to 1.6 microns. The height of the supporting unit 802 in the first direction may be the sum of the heights of the second sub-supporting post 3062 and the boss 801 in the first direction, and the value range of the supporting unit 802 may include 4 micrometers to 4.8 micrometers. That is, the second vertical distance h2 (i.e., the thickness of the first liquid crystal layer 302 in the first sub-region Q1 in the first direction) may have a value ranging from 3.6 micrometers to 4.4 micrometers, for example. Accordingly, the first vertical distance h1 (the thickness of the first liquid crystal layer 302 in the second sub-region Q2 in the first direction) may have a range of values greater than 5.1 μm.

It should be noted that, when the height of the second sub-support post 3062 in the first direction ranges from 2.4 micrometers to 2.8 micrometers, the second sub-support post 3062 may be a support post with a lower height prepared by the existing process, and may be referred to as an auxiliary support post SPS. When the height of the second sub-support post 3062 in the first direction ranges from 2.8 micrometers to 3.2 micrometers, the second sub-support post 3062 may be another support post with a higher height prepared by the existing process, which may be referred to as a main support post MPS.

Therefore, on the basis of increasing the bosses 801 corresponding to the second sub-support posts 3062, the second sub-support posts 3062 with a larger height and a value range of 2.8 to 3.2 micrometers are further selected, and the height of the support in the first liquid crystal layer 302 is further increased, so that the thickness of the first liquid crystal layer 302 in the second sub-region Q2 in the first direction can be set thicker, and therefore, the angle difference between the liquid crystal molecules at different positions of the first liquid crystal layer 302 in the second sub-region Q2 can be further reduced, the grating structure formed among the liquid crystal molecules is reduced or weakened, the diffraction phenomenon of the first liquid crystal layer 302 in the second sub-region Q2 to light is improved, the imaging resolution of the camera under the screen is improved, the photographing effect of starburst is weakened, and the image quality shot by the camera under the screen is improved.

It should be noted that the shape of the second sub-support post 3062 may be a regular quadrangular frustum, a circular truncated cone, or other shapes. The bottom of the second sub-support post 3062 may be connected with the connection layer 303, and the top of the second sub-support post 3062 may be connected with the second substrate 304. When the second sub-support post 3062 is a square pyramid, an orthographic projection of the bottom of the second sub-support post 3062 on the second substrate may be square. When the second sub-support post 3062 is an SPS, the side length of the square may range from 9 micrometers to 12 micrometers; when the second sub-support post 3062 is an MPS, the side length of the square may range from 7 micrometers to 10 micrometers. When the second sub-support post 3062 is a circular table, an orthographic projection of the bottom of the second sub-support post 3062 on the second substrate may be circular. When the second sub-support post 3062 is SPS, the diameter of the circle may range from 9 microns to 12 microns; when the second sub-support post 3062 is MPS, the diameter of the circle may range from 7 micrometers to 10 micrometers.

With continued reference to fig. 9, in some embodiments according to the present application, optionally, for each boss 801, an orthographic projection of the boss 801 on the first substrate 301 completely covers an orthographic projection of the second sub-support post 3062 corresponding to the boss 801 on the first substrate 301. Specifically, it may be that an orthographic projection of a third surface (surface d shown in fig. 9) of the boss 801 on the first substrate 301 completely covers an orthographic projection of a fourth surface (surface e shown in fig. 9) of the second sub-support post 3062 corresponding to the boss 801 on the first substrate 301, wherein the third surface of the boss 801 is opposite to the fourth surface of the second sub-support post 3062 corresponding to the boss 801.

In this way, since the surface diameter of the boss 801 is larger than the surface diameter of the second sub-support post 3062, even if the second sub-support post 3062 is displaced a small distance, the second sub-support post 3062 can still be positioned on the boss 801, the second sub-support post 3062 is prevented from slipping off, and the stability of the support unit is ensured.

In some embodiments according to the present application, as shown in fig. 10 and fig. 11, optionally, on the basis of the embodiment shown in fig. 9, the first support column 306 may further include a third sub-support column 3063, and the second sub-support column 3062 and the third sub-support column 3063 are arranged in an array in which the second direction (the X direction shown in fig. 10) intersects the third direction (the Y direction shown in fig. 10). In at least one of the second and third directions, the third sub-support posts 3063 are located between adjacent second sub-support posts 3062. For example, in the second direction, the third sub-support posts 3063 are located between adjacent second sub-support posts 3062. It is noted that the height of the third sub-support post 3063 in the first direction is less than the second vertical distance h 2. That is, the height of the third sub support post 3063 in the first direction is less than the thickness of the first liquid crystal layer 302 in the first sub-region Q1 in the first direction.

In this way, the third sub-support post 3063 is added on the basis of the second sub-support post 3062, and when the display panel 20 is pressed by an external force, the third sub-support post 3063 can play a supporting role, so that the display panel 20 is prevented from being seriously deformed.

As shown in fig. 11 and 12, in some specific embodiments of the present application, one third sub-support post 3063 may be disposed between adjacent second sub-support posts 3062 in at least one of the second direction and the third direction, or a plurality of third sub-support posts 3063 may be disposed between adjacent second sub-support posts 3062. As shown in particular in fig. 12, for example, two third sub-support posts 3063 may be disposed between adjacent second sub-support posts 3062.

In the case that a plurality of third sub-support posts 3063 are disposed between adjacent second sub-support posts 3062, since the number of the third sub-support posts 3063 is increased, when the display panel 20 is pressed by an external force, the more number of the third sub-support posts 3063 can play a better supporting role, and the display panel 20 is prevented from being seriously deformed.

It should be noted that the shape of the third sub-support post 3063 may be a regular quadrangular frustum, a circular truncated cone, or other shapes. The bottom of the third sub-support post 3063 may be connected with the connection layer 303, and the top of the third sub-support post 3063 may be connected with the second substrate 304. When the third sub-support post 3063 is a square frustum, an orthogonal projection of the bottom of the third sub-support post 3063 on the second substrate may be a square, and a side length of the square may range from 7 micrometers to 10 micrometers. When the third sub-support post 3063 is a circular truncated cone, an orthogonal projection of the bottom of the third sub-support post 3063 on the second substrate may be circular, and a diameter of the circular shape may range from 7 micrometers to 10 micrometers.

The arrangement interval of the first support columns will be described below with reference to fig. 13. It is to be understood that the first support column may refer to the first sub-support column, the second sub-support column, and a combination of the second sub-support column and the third sub-support column.

As shown in fig. 13, according to some embodiments of the present application, optionally, the first sub-region Q1 may include a plurality of color sub-pixel groups 1101, the second sub-region Q2 may include a plurality of white sub-pixels W, and one color sub-pixel group 1101 and one adjacent white sub-pixel W constitute a pixel unit PX. Each color sub-pixel group 1101 may include a plurality of color sub-pixels 1101a, the plurality of color sub-pixels 1101a in each color sub-pixel group 1101 may be arranged in the second direction (X direction shown in fig. 13), and the color sub-pixel group 1101 and the white sub-pixel W may be arranged in the third direction (Y direction shown in fig. 13).

Accordingly, the first support columns 306 are arranged in an array in which the second direction crosses the third direction. Alternatively, in the second direction, the distance k1 between two adjacent first support pillars 306 is greater than or equal to the extension length l1 of one pixel unit PX in the second direction, and is less than or equal to the extension length l1 of two pixel units PX in the second direction. In the third direction, the distance k2 between two adjacent first support pillars 306 is greater than or equal to the extension length l2 of one pixel unit PX in the third direction, and is less than or equal to the extension length l2 of two pixel units PX in the third direction.

The first support columns 306 in the embodiment of the present application are arranged at the above intervals, mainly because: after a lot of experiments, the inventor of the present application verifies that when the distance between two adjacent first support columns 306 is greater than the extension length l1 of two pixel units PX in the second direction and/or the extension length l2 of two pixel units PX in the third direction, the first support columns 306 have a weak support effect on the display panel 20 due to the low distribution density of the first support columns 306, and the display panel 20 is greatly deformed in the thickness direction thereof; when the distance between two adjacent first support columns 306 is less than the extension length l1 of one pixel unit PX in the second direction and/or the extension length l2 of one pixel unit PX in the third direction, the support capacity of the first support columns 306 already far exceeds the pressure borne by the first support columns 306, and the display panel has a higher production cost and a lower aperture ratio and light passing rate of the first display region due to the higher distribution density of the first support columns 306. The interval arrangement in the embodiment shown in fig. 13 can prevent the display panel from being greatly deformed, reduce the production cost of the display panel, and improve the aperture opening ratio and the light passing rate of the first display area.

It should be noted that when the first support post 306 only includes the first sub-support post 3061 shown in fig. 8, it can be specifically understood that: in the second direction, a distance k1 between two adjacent first sub support posts 3061 is greater than or equal to an extension length l1 of one pixel unit PX in the second direction, and is less than or equal to an extension length l1 of two pixel units PX in the second direction. In the third direction, the distance k2 between two adjacent first sub support posts 3061 is greater than or equal to the extension length l2 of one pixel unit PX in the third direction, and is less than or equal to the extension length l2 of two pixel units PX in the third direction.

When the first support post 306 includes only the second sub-support post 3062 shown in fig. 9, it can be specifically understood that: in the second direction, a distance k1 between two adjacent second sub support posts 3062 is greater than or equal to an extension length l1 of one pixel unit PX in the second direction, and is less than or equal to an extension length l1 of two pixel units PX in the second direction. In the third direction, the distance k2 between two adjacent second sub support posts 3062 is greater than or equal to the extension length l2 of one pixel unit PX in the third direction, and is less than or equal to the extension length l2 of two pixel units PX in the third direction.

When the first support column 306 includes the second sub-support columns 3062 and the third sub-support columns 3063 shown in fig. 11, and only one third sub-support column 3063 is disposed between the adjacent second sub-support columns 3062, it can be specifically understood that: in the second direction, a distance k1 between two adjacent second sub support posts 3062 is greater than or equal to an extension length l1 of one pixel unit PX in the second direction, and is less than or equal to an extension length l1 of two pixel units PX in the second direction. In the third direction, the distance k2 between two adjacent second sub support posts 3062 is greater than or equal to the extension length l2 of one pixel unit PX in the third direction, and is less than or equal to the extension length l2 of two pixel units PX in the third direction. In the second direction, a distance k1 between two adjacent third sub support posts 3063 is greater than or equal to an extension length l1 of one pixel unit PX in the second direction, and is less than or equal to an extension length l1 of two pixel units PX in the second direction. In the third direction, the distance k2 between two adjacent third sub support posts 3063 is greater than or equal to the extension length l2 of one pixel unit PX in the third direction, and is less than or equal to the extension length l2 of two pixel units PX in the third direction.

As shown in fig. 13, according to some embodiments of the present disclosure, each color sub-pixel group 1101 may specifically include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B may be arranged along the second direction, and the color sub-pixel group 1101 and the white sub-pixel W in each pixel unit PX may be arranged along the third direction. The first color resist layer 305 may include a red resist 305R, a green resist 305G and a blue resist 305B corresponding to the sub-pixels of different colors, wherein the red resist 305R corresponds to the red sub-pixel R, the green resist 305G corresponds to the green sub-pixel G, and the blue resist 305B corresponds to the blue sub-pixel B. In some specific examples, the extension length l1 of one pixel unit PX in the second direction may specifically include: the sum of the extending lengths of the red color resist 305r, the green color resist 305g, and the blue color resist 305b in the second direction in one pixel unit PX. The extension length l2 of one pixel unit PX in the third direction may specifically include: the sum of the extension lengths in the third direction of an arbitrary color resist (any one of the red resist 305r, the green resist 305g, and the blue resist 305 b) in one pixel unit PX, the white sub-pixel W, and the black matrix 501 between the arbitrary color resist and the white sub-pixel W.

With continued reference to fig. 13, in accordance with some embodiments of the present application, the first display area AA1 may optionally include a plurality of first sub-areas Q1 and a plurality of second sub-areas Q2. The first sub-regions Q1 and the second sub-regions Q2 each extend in the second direction (X direction shown in fig. 13), and the first sub-regions Q1 and the second sub-regions Q2 are arranged alternately in the third direction (Y direction shown in fig. 13), which may be a row direction, and which may be a column direction. A first sub-region Q1 may comprise only one row of color sub-pixel groups 1101 and a second sub-region Q2 may comprise only one row of color sub-pixel groups 1101Comprising a row of white sub-pixels W. In some specific examples, the extension length lw of the white sub-pixel W in the third direction in one pixel unit PX may be equal to the extension length lQ of one second sub-region in the third direction₂。

Based on the display panel provided by the above embodiment, correspondingly, the application further provides a display device. As shown in fig. 14, the display device 1000 may include the apparatus body 10 and the display panel 20 in the above embodiments, and the display panel 20 is covered on the apparatus body 10. The apparatus body 10 may be provided with various devices, such as a sensing device, a processing device, and the like, but is not limited thereto. The display device 1000 may be a device having a display function, such as a mobile phone, a computer, a tablet computer, a digital camera, a television, and electronic paper, and is not limited herein.

It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For the display panel embodiment and the display device embodiment, the related matters can be referred to the description parts of the pixel driving circuit embodiment and the array substrate embodiment. The present application is not limited to the particular structures described above and shown in the figures. Those skilled in the art may make various changes, modifications and additions after comprehending the spirit of the present application. Also, a detailed description of known techniques is omitted herein for the sake of brevity.

It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the drawings, the specification, and the claims. In the claims, the term "comprising" does not exclude other structures; the quantities relate to "a" and "an" but do not exclude a plurality; the terms "first" and "second" are used to denote a name and not to denote any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Claims

1. The display panel is characterized by comprising a first display area and a second display area surrounding at least part of the first display area, wherein the light passing rate of the first display area is greater than that of the second display area, and the first display area comprises a first substrate, a first liquid crystal layer, a connecting layer and a second substrate which are sequentially stacked;

the first display area comprises a first sub-area and a second sub-area, the first sub-area is provided with a first color resistance layer and a first supporting column, the second sub-area is not provided with the first color resistance layer and the first supporting column, the first color resistance layer is located between the connecting layer and the second substrate, and the first supporting column is located between the connecting layer and the first substrate;

a first vertical distance between a first surface of the connection layer in the second sub-area and a second surface of the first substrate is greater than a second vertical distance between the first surface of the connection layer in the first sub-area and the second surface of the first substrate, the first surface is a surface of the connection layer facing the first substrate, and the second surface is a light emitting surface or a backlight surface of the first substrate.

2. The display panel according to claim 1, wherein the second display region is provided with second support columns, and a distribution density of the first support columns in the first display region is greater than a distribution density of the second support columns in the second display region.

3. The display panel according to claim 1, wherein the first sub-region is adjacent to the second sub-region at a first edge region, the first edge region being provided with a black matrix, the black matrix being located between the connection layer and the second substrate;

the orthographic projection of the first support column on the second substrate is overlapped with the orthographic projection of the black matrix on the second substrate.

4. The display panel according to claim 3, wherein the first color resist layer comprises color resist units of a plurality of colors, adjacent color resist units are different colors, the black matrix is located at a boundary between the adjacent color resist units, and an orthogonal projection of the black matrix on the second substrate partially overlaps an orthogonal projection of the first color resist layer on the second substrate.

5. The display panel according to any one of claims 1 to 4, wherein the first support column comprises a first sub-support column, the first sub-support column extends along a first direction, a height of the first sub-support column in the first direction is greater than or equal to the second perpendicular distance, and the first direction comprises a thickness direction of the display panel.

6. The display panel of claim 5, wherein the first vertical distance has a value in a range from 3.6 micrometers to 4 micrometers.

7. The display panel according to any one of claims 1 to 4, wherein the first support column includes a second sub-support column extending in a first direction, the first direction including a thickness direction of the display panel;

the display panel further comprises bosses, the bosses correspond to the second sub-support columns one to one, the bosses are located between the second sub-support columns and the first substrate, and orthographic projections of the bosses on the first substrate are at least partially overlapped with orthographic projections of the second sub-support columns on the first substrate;

the second sub-supporting column and the boss correspondingly arranged on the second sub-supporting column form a supporting unit, and the height of the supporting unit in the first direction is larger than or equal to the second vertical distance.

8. The display panel according to claim 7, wherein the first support column further comprises a third sub-support column, and the second sub-support column and the third sub-support column are arranged in an array in which the second direction crosses the third direction;

in at least one of the second direction and the third direction, the third sub-support columns are located between adjacent second sub-support columns;

the height of the third sub-support column at the first height is less than the second vertical distance.

9. The display panel according to claim 7 or 8, wherein an orthographic projection of the boss on the first substrate completely covers an orthographic projection of the second sub-support post corresponding to the boss on the first substrate.

10. The display panel according to claim 8, wherein one or more third sub-support columns are disposed between the adjacent second sub-support columns in at least one of the second direction and the third direction.

11. The display panel of claim 7, wherein the first vertical distance has a value in a range from 4.7 micrometers to 5.1 micrometers.

12. The display panel according to claim 1, wherein the first sub-area comprises a plurality of color sub-pixel groups, the second sub-area comprises a plurality of white sub-pixels, and one color sub-pixel group and an adjacent white sub-pixel constitute a pixel unit;

the first support columns are arranged in an array with a second direction and a third direction crossed, the second direction is the arrangement direction of a plurality of color sub-pixels in the color sub-pixel group, and the third direction is the alternate arrangement direction of the color sub-pixel group and the white sub-pixel;

in the second direction, the distance between two adjacent first support columns is greater than or equal to the extension length of one pixel unit in the second direction, and is less than or equal to the extension length of two pixel units in the second direction;

in the third direction, the distance between two adjacent first support columns is greater than or equal to the extension length of one pixel unit in the third direction, and is less than or equal to the extension length of two pixel units in the third direction.

13. The display panel according to claim 12, wherein each of the color sub-pixel groups includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the red sub-pixel, the green sub-pixel, and the blue sub-pixel are arranged along the second direction, and the color sub-pixel group and the white sub-pixel in each of the pixel units are arranged along the third direction;

the first color resistance layer comprises a red color resistance, a green color resistance and a blue color resistance, the red color resistance corresponds to the red sub-pixel, the green color resistance corresponds to the green sub-pixel, and the blue color resistance corresponds to the blue sub-pixel;

the extension length of the pixel unit in the second direction comprises: the sum of the extension lengths of the red color resistance, the green color resistance and the blue color resistance in the pixel unit in the second direction;

the extension length of the pixel unit in the third direction comprises: and the sum of the extension lengths of the arbitrary color resistor, the white sub-pixel and the black matrix between the arbitrary color resistor and the white sub-pixel in the pixel unit in the third direction.

14. The display panel according to claim 13, wherein the first display region includes a plurality of the first sub-regions and a plurality of the second sub-regions;

the first sub-regions and the second sub-regions extend along the row direction, and the first sub-regions and the second sub-regions are arranged in a staggered mode along the column direction;

one of said first sub-regions comprising only one row of said color sub-pixel groups and one of said second sub-regions comprising only one row of said white sub-pixels;

the extension length of the white sub-pixel in the third direction is equal to the extension length of one of the second sub-regions in the third direction.

15. The display panel according to claim 3, wherein a minimum straight-line distance between an edge of an orthographic projection of the first support column on the black matrix and a second edge of the black matrix is in a range from 2 micrometers to 10 micrometers, and the second edge is an edge of the black matrix close to the second sub-area.

16. A display device characterized in that it comprises a display panel as claimed in any one of claims 1 to 15.