CN114217468B

CN114217468B - Display panel, manufacturing method thereof and display device

Info

Publication number: CN114217468B
Application number: CN202111629493.1A
Authority: CN
Inventors: 吴玲; 方丽婷; 沈柏平
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2023-09-01
Anticipated expiration: 2041-12-28
Also published as: CN114217468A

Abstract

The application provides a display panel and a manufacturing method thereof, and a display device, wherein the display panel comprises a color film substrate, an array substrate and a liquid crystal layer between the color film substrate and the array substrate, one side of the color film substrate, which is far away from the array substrate, is provided with a cover plate, at least part of a first part of the array substrate, which is positioned in a blind hole area, is sunken towards one side of the color film substrate relative to a second part, which is positioned in a non-blind hole area, which is towards the color film substrate, the shape of the first surface of the cover plate is arranged, so that at least part of a third part of the color film substrate, which is positioned in the blind hole area, is sunken towards one side, which is far away from the array substrate relative to a fourth part, which is positioned in the non-blind hole area, the projection of the sunken part of the array substrate on the first surface of the cover plate and the sunken part of the first surface are provided with overlapping areas, namely, the array substrate and the color film substrate are deformed towards the same direction in the blind hole area, and the deformed positions are overlapped, the uniformity of thickness of the liquid crystal box in the blind hole area is improved, and imaging distortion of a photosensitive device in the blind hole area is improved.

Description

Display panel, manufacturing method thereof and display device

Technical Field

The present application relates to the field of display, and in particular, to a display panel, a method for manufacturing the same, and a display device.

Background

With the innovation and development of display technology, the concept of screen occupation ratio is more and more important, and the space occupied by the photosensitive device in the screen is particularly important for realizing full-screen display.

The under-screen photosensitive device technology is that on the premise of not damaging the integrity of a screen, the full-screen display can be realized, and the screen display is divided into two parts: a conventional display area and an under-screen photosensitive device area. The blind hole comprehensive screen is used as a high-screen-ratio comprehensive screen solution, is an important point of research and development of current panel manufacturers, is provided with a photosensitive device firmware installation position, has no display function in the blind hole, and is provided with a normal display area outside the blind hole. However, the current blind hole full screen has the problem that imaging of a photosensitive device is distorted.

Disclosure of Invention

Accordingly, the present application is directed to a display panel, a method for manufacturing the same, and a display device for reducing distortion of imaging of a photosensitive device at a blind via.

The embodiment of the application provides a display panel, which is provided with a blind hole area and a non-blind hole area outside the blind hole area, and comprises the following components:

a color film substrate, an array substrate and a liquid crystal layer positioned between the color film substrate and the array substrate;

at least part of the first part of the array substrate, which is positioned in the blind hole area, is sunken towards one side of the color film substrate relative to the second part of the array substrate, which is positioned in the non-blind hole area;

The cover plate is positioned on one side of the color film substrate, which is away from the array substrate; the cover plate is attached to the color film substrate; the surface of the cover plate, which faces the color film, is used as a first surface, and at least part of the first surface, which is positioned in the fifth part of the blind hole area, is recessed towards the side, which is away from the array substrate, relative to the sixth part, which is positioned in the non-blind hole area, so that at least part of the third part, which is positioned in the blind hole area, of the color film substrate is recessed towards the side, which is away from the array substrate, relative to the fourth part, which is positioned in the non-blind hole area; the projection of the concave part of the array substrate on the first surface of the cover plate and the area where the concave part of the first surface is located have an overlapping area.

The embodiment of the application provides a display device, which comprises a photosensitive device and a display panel; the photosensitive device is located on one side, away from the color film substrate, of the array substrate, and the projection of the photosensitive device on the surface of the array substrate and the blind hole area are provided with overlapping areas.

The embodiment of the application provides a manufacturing method of a display panel, wherein the display panel comprises a blind hole area and a non-blind hole area outside the blind hole area, and the method comprises the following steps:

Fixing a color film substrate and an array substrate; a liquid crystal layer is arranged between the color film substrate and the array substrate; at least part of the first part of the array substrate, which is positioned in the blind hole area, is sunken towards one side of the color film substrate relative to the second part of the array substrate, which is positioned in the non-blind hole area; at least part of the third part of the color film substrate, which is positioned in the blind hole area, is sunken towards one side of the array substrate relative to the fourth part of the non-blind hole area;

a cover plate is arranged on one side of the color film substrate, which is away from the array substrate; the cover plate is attached to the color film substrate; the surface of the cover plate, which faces the color film substrate, is used as a first surface, at least part of the first surface, which is positioned in the fifth part of the blind hole area, is sunken towards the side, which is away from the array substrate, relative to the sixth part, which is positioned in the non-blind hole area, of the first surface, and at least part of the third part, which is positioned in the blind hole area, of the color film substrate, after the color film substrate is attached to the cover plate, is sunken towards the side, which is away from the array substrate, relative to the fourth part, which is positioned in the non-blind hole area, of the second surface; the projection of the concave part of the array substrate on the first surface of the cover plate and the area where the concave part of the first surface is located have an overlapping area.

The embodiment of the application provides a display panel and a manufacturing method thereof, and a display device, wherein the display panel can be provided with a blind hole area and a non-blind hole area outside the blind hole area, the display panel comprises a color film substrate, an array substrate and a liquid crystal layer between the color film substrate and the array substrate, a cover plate is arranged on one side of the color film substrate, which is away from the array substrate, of the color film substrate, at least part of the array substrate is recessed towards one side of the color film substrate relative to a second part of the blind hole area, which is located in the blind hole area, of the array substrate, the shape of the cover plate towards the first surface of the color film substrate is arranged, for example, at least part of the first surface of the fifth part of the blind hole area is recessed towards one side away from the array substrate relative to a sixth part of the non-blind hole area, so that at least part of the color film substrate is recessed towards one side away from the array substrate, the projection of the recessed part of the array substrate on the first surface of the cover plate is provided with a cover plate, that is overlapped with the area towards the same direction relative to the second part of the blind hole area, that is located in the first surface of the blind hole area, and the liquid crystal layer is located in the first surface of the recessed part, and the liquid crystal layer is located in the blind hole area.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are some embodiments of the application and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an ideal display panel;

FIG. 2 is a schematic diagram of a structure after bonding a color film substrate and an array substrate;

FIG. 3 is a schematic diagram of a display panel according to the present embodiment;

FIG. 4 is a schematic diagram of a blind hole region liquid crystal cell thickness in the prior art;

FIG. 5 is a schematic view of a blind hole in the prior art;

fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present application;

FIG. 9 is a schematic diagram illustrating a cover plate according to an embodiment of the application;

fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of another display panel according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another display panel according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the present application;

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

fig. 15 is a flowchart of a method for manufacturing a display panel according to an embodiment of the application.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.

In the following detailed description of the embodiments of the present application, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the application is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

In the existing display panel, the blind hole full-face screen is used as a high-screen-ratio full-face screen solution, is an important point of research and development of current panel manufacturers, the blind hole position is a photosensitive device firmware installation position, no display function is arranged in the blind hole, and a normal display area is arranged outside the blind hole. Referring to fig. 1, a schematic structural diagram of an ideal display panel at present includes a color film substrate 13, an array substrate 11, and a liquid crystal layer 12 between the color film substrate 13 and the array substrate 11, wherein a cover plate 14 is disposed on a side of the color film substrate 13 facing away from the array substrate 11, the display panel has a blind hole area 101 and a non-blind hole area 102 outside the blind hole area 101, and the blind hole area 101 may be provided with a photosensitive device.

In order to improve the optical transmittance and uniformity of the blind hole area 101 and ensure the imaging quality of the photosensitive device arranged in the blind hole area 101, the color film substrate 13 of the blind hole area 101 and the structure affecting light transmission in the array substrate 11 are designed to be open, for example, no support column is arranged in the blind hole area 101, so that the liquid crystal supporting capability of the blind hole area 101 is limited, after the color film substrate 13 and the array substrate 11 are attached, the color film substrate 13 and the array substrate 11 are recessed inwards under the action of gravity and atmospheric pressure, so that the thickness of a liquid crystal box between the color film substrate 13 and the array substrate 11 in the blind hole area is uneven, and the structure is shown in reference to fig. 2 after the color film substrate 13 and the array substrate 11 are attached.

After the color film substrate 13 is attached to the cover plate 14 on the side away from the array substrate 11, the shape of the color film substrate 13 is affected by the cover plate 14, so that the color film substrate 13 extends along the surface of the cover plate 14, as shown in fig. 3, a schematic structural diagram of a practical display panel at present is shown, in which the array substrate 11 in the blind hole area 101 is recessed downward, and the color film substrate 13 is not recessed, so that the thickness of the liquid crystal cell in the blind hole area 101 is uneven, and the middle thin edge is thick. Referring to fig. 4, a schematic diagram of a thickness of a liquid crystal cell in a blind hole area is shown, in which blind holes are taken as an example, an abscissa in the drawing is a diameter coordinate X of the round hole, a unit is a micrometer (um), an ordinate is a thickness of the liquid crystal cell (cell gap), a unit is a micrometer (um), it can be seen from the drawing that the thickness of the liquid crystal cell in an edge area is about 8.3um, the thickness of the liquid crystal cell in a central area is about 6.1um, and the non-uniformity of the thickness of the liquid crystal cell is relatively obvious. Referring to fig. 5, a schematic view of a blind hole is shown, in which the optical paths in the blind hole area in the radial direction are different due to the uneven thickness of the liquid crystal cell, so that distortion exists in the photographed pattern of the photosensitive device.

Based on this, the embodiment of the application provides a display panel and a manufacturing method thereof, and a display device, wherein the display panel can be provided with a blind hole area and a non-blind hole area outside the blind hole area, the display panel comprises a color film substrate, an array substrate and a liquid crystal layer between the color film substrate and the array substrate, one side of the color film substrate, which is away from the array substrate, is provided with a cover plate, at least part of a first part of the array substrate, which is located in the blind hole area, is recessed towards one side of the color film substrate relative to a second part, which is located in the non-blind hole area, and the shape of a first surface, such as a shape of the cover plate, which is located in a fifth part of the blind hole area, which is located at least part of the first surface, is recessed towards one side, which is away from the array substrate relative to a sixth part, which is located in the non-blind hole area, at least part of the color film substrate in the third part of the blind hole area is sunken towards one side deviating from the array substrate relative to the fourth part of the non-blind hole area, the projection of the sunken part of the array substrate on the first surface of the cover plate and the region where the sunken part of the first surface is located are provided with overlapping regions, that is, the first part of the array substrate in the blind hole area and the third part of the color film substrate in the blind hole area deform towards the same direction, and the deformed positions are overlapped, so that the uniformity of the distance between the color film substrate and the array substrate in the blind hole area is improved, the uniformity of the thickness of the liquid crystal box in the blind hole area is improved, the problem that the thickness of the liquid crystal box in the blind hole area is uneven due to the fact that the blind hole area is only sunken by the array substrate is solved, and the imaging distortion of a photosensitive device in the blind hole area is improved.

For a better understanding of the technical solutions and technical effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.

Referring to fig. 6, fig. 7, and fig. 8, which are schematic structural diagrams of a display panel according to an embodiment of the present application, the display panel may include a color film substrate 23 and an array substrate 21, and a liquid crystal layer 22 located between the color film substrate 23 and the array substrate 21, where the color film substrate 23 and the array substrate 21 are disposed opposite to each other. The color film substrate 23 is a substrate facing the user during use, and the array substrate 21 is a substrate facing the photosensitive device during use. The photosensitive device may be, for example, a camera or the like.

The array substrate 21 includes a first substrate and a first functional layer, where the first functional layer includes thin film transistors arranged in an array, at least one thin film transistor is disposed corresponding to each pixel, and a material of the first substrate may be glass or polyimide. The color film substrate 23 may include a second substrate and a second functional layer, the second functional layer includes a color filter, the same pixel includes a set of color filters, the set of color filters includes a red filter, a green filter, and a blue filter, and the material of the second substrate may be glass or polyimide, etc.

The color film substrate 23 and the array substrate 21 are oppositely arranged, and the shapes of the color film substrate and the array substrate are consistent, so that the thickness of the liquid crystal layer 22 between the color film substrate and the array substrate is relatively uniform. For example, the color film substrate 23 and the array substrate 21 may be both planar substrates, so as to form a planar display panel, as shown in fig. 6; the color film substrate 23 and the array substrate 21 may be curved substrates, and thus form a curved (curved) display panel, as shown in fig. 7 and 8. Specifically, the curvature centers of the color film substrate 23 and the array substrate 21 are located at one side of the color film substrate 23 away from the array substrate 21, that is, in terms of the whole display panel, the center of the color film substrate 23 is concave outside the display panel, the center of the array substrate 21 is convex outside the display panel, and when the plane size of the display panel is large, the display panel is set to be a curved surface, so that a user can have good stereoscopic impression when watching, because the line of sight of the user is nearly perpendicular to each direction of the surface of the display panel when watching, no parallax exists at each position of the display panel, and the user at one side of the color film substrate 23 has good watching experience.

When the curvature range of the curved surface display panel is too small, the display effect is close to that of the planar display panel, the stereoscopic impression can be weakened, and when the curvature range of the curved surface display panel is too large, the display effect at the edge is affected, so that the curvature range of the curved surface display panel can be 500-5000 mm, and the stereoscopic impression of a user and the edge display effect of the display panel can be considered. Specifically, the curvature ranges of the color film substrate 23 and the array substrate 21 may be 1000 to 3000mm, that is, 500 to 5000mm, and specifically, 1000 to 3000mm.

It should be noted that "concave" and "convex" referred to in the embodiments of the present application are relative concepts, and for one surface, it is outwardly embodied as concave and inwardly embodied as convex, and conversely, it is outwardly embodied as concave and inwardly embodied as convex.

For ease of illustration, directions may be defined for "concave" and "convex: a partial region of one surface is recessed in a first direction, indicating that the recessed partial surface of the surface is closer to an endpoint of the first direction relative to a surface of a non-recessed region; in practice, a partial region of one surface is convex in a first direction, also indicating that the convex partial surface of that surface is closer to the end point of the first direction than the surface of the non-convex region. That is, a partial region of one surface is concave in a first direction, and a partial region of one surface is convex in the first direction, characterizing the same shape.

In addition, a partial region of one unitary structure is recessed in a first direction, and a partial region of each of opposite surfaces of the unitary structure is recessed in the first direction.

For example, the first structure has opposite a-surface and B-surface, and the direction of the a-surface to the B-surface is referred to as a first direction, and the X-region of the a-surface of the substrate is recessed in the first direction, which indicates that the a-surface of the first structure in the X-region is closer to the B-surface (i.e., closer to the end point of the first direction) than the a-surface of the other region than the X-region; the X-region of the B-surface of the substrate is recessed toward the first direction, indicating that the first structure is further away from the a-surface (i.e., closer to the end point of the first direction) at the B-surface of the X-region than at other regions than the X-region; the X-region of the first structure is recessed in a first direction, indicating that the X-region of the a-surface of the first structure is recessed in the first direction, and the X-region of the B-surface of the first structure is recessed in the first direction, i.e. the a-surface of the first structure is closer to the B-surface than the a-surfaces of other regions than the X-region (i.e. closer to the end point of the first direction), whereas the B-surface of the first structure is further away from the a-surface than the B-surface of other regions than the X-region (i.e. closer to the end point of the first direction), in effect the a-surface of the first structure is outwardly embodied as a recess and the B-surface of the first structure is outwardly embodied as a protrusion. The first structure may be an array substrate 21, a color film substrate 23 or a cover plate 24.

The color film substrate 23 and/or the array substrate 21 are provided with liquid crystal support columns 221, and the liquid crystal support columns 221 are used for supporting liquid crystal, so that a fixed distance is reserved between the color film substrate 23 and the array substrate 21, and the thickness uniformity of the liquid crystal layer 22 is facilitated.

Specifically, the array substrate 21 may have a first alignment film, where the first alignment film is located on a side of the first functional layer facing away from the first substrate, and the color film substrate 23 may have a second alignment film, where the second alignment film is located on a side of the second functional layer facing away from the second substrate.

When the array substrate 21 has the liquid crystal support columns 221, the liquid crystal support columns 221 are disposed between the first functional layer and the first alignment film, and the liquid crystal support columns 221 protrude from the first functional layer toward the color film substrate 23, the first alignment film covers the first functional layer and the liquid crystal support columns 221, so that the first alignment film and the second alignment film on top of the liquid crystal support columns 221 are in contact, thereby supporting the first substrate and the second substrate with the liquid crystal support columns 221.

When the color film substrate 23 has the liquid crystal support columns 221, the liquid crystal support columns 221 are disposed between the second functional layer and the second alignment film, and the liquid crystal support columns 221 protrude from the second functional layer toward the array substrate 21, the second alignment film covers the second functional layer and the liquid crystal support columns 221, so that the second alignment film on top of the liquid crystal support columns 221 contacts the first alignment film, thereby supporting the first and second substrate substrates with the liquid crystal support columns 221.

When the color film substrate 23 and the array substrate 21 both have the liquid crystal support columns 221, the liquid crystal support columns of the array substrate 21 may be denoted as first support columns, the liquid crystal support columns of the color film substrate 23 may be denoted as second support columns, the first support columns are located between the first functional layer and the first alignment film, the second support columns are located between the second functional layer and the second alignment film, the first support columns protrude from the first functional layer toward the color film substrate 23, the first alignment film covers the first functional layer and the first support columns, the second support columns protrude from the second functional layer toward the array substrate 21, and the second alignment film covers the second functional layer and the second support columns.

The first alignment film positioned on the top of the first support column can be in contact with the second alignment film on the top of the second support column, so that the first support column and the second support column are oppositely arranged to be used as a liquid crystal support column 221 between the first substrate and the second substrate together, and the sum of the thicknesses of the first support column, the second support column, the first alignment film and the second alignment film is equal to the distance between the first functional layer and the second functional layer; or the first alignment film on top of the first support column may be in contact with the second alignment film covering the second functional layer, and the second alignment film on top of the second support column may be in contact with the first alignment film covering the first functional layer, so that the first support column and the second support column are alternately arranged, each respectively serving as the liquid crystal support column 221 between the first substrate and the second substrate, at this time, the sum of the thicknesses of the first support column, the first alignment film and the second alignment film is equal to the distance between the first functional layer and the second functional layer, and the sum of the thicknesses of the second support column, the first alignment film and the second alignment film is also equal to the distance between the first functional layer and the second functional layer.

For convenience of description, the direction from the color film substrate 23 to the array substrate 21 may be referred to as "up", and the direction from the array substrate 21 to the color film substrate 23 may be referred to as "down", where in the structural embodiment of the display panel, "up" and "down" are provided for convenience of description, and are independent of the placement directions of the color film substrate 23 and the array substrate 21 and independent of gravity.

In the embodiment of the application, the display panel is provided with the blind hole area 201 and the non-blind hole area 202 outside the blind hole, the blind hole area 201 is used for arranging the photosensitive device without a display function, and the non-blind hole area 202 is used for realizing a normal display function, so that the light transmittance of the display panel in the blind hole area 201 is larger than that of the non-blind hole area 202, and the photosensitive device in the blind hole area 201 can have a better shooting effect.

Specifically, the structures affecting light transmission in the color film substrate 23 and the array substrate 21 of the blind hole area 201 may be designed as open holes, i.e. the blind hole area 201 may not be provided with the first functional layer and the second functional layer, i.e. the color filter and the thin film transistor; or no film layer affecting light transmission in the first functional layer and the second functional layer may be disposed in the blind hole region 201, for example, no metal layer or metal interconnection line is disposed, and the metal layer may be a gate metal layer, a source metal layer, and a drain metal layer. In addition, the blind via region 201 may not be provided with the liquid crystal support columns 221 to ensure high light transmittance of the blind via region 201, so that the liquid crystal support columns 221 are disposed in the non-blind via region 202. In addition, when the display panel has a touch function, the blind hole area 201 is not provided with a touch layer or a film layer influencing light transmission in the touch layer, for example, the blind hole area 201 is not provided with a touch signal line.

Currently, the application of the display panel provided with the blind hole area 201 is relatively wide, and the vehicle-mounted (automatic) oversized display screen is a current and future trend, and the provision of the blind hole area 201 in the vehicle-mounted display screen is an important development direction in the field. Aiming at display panels of different scenes, the size setting of the blind hole area 201 is gradually diversified, and the blind hole area 201 with larger size can be compatible with larger photosensitive devices, so that the larger-sized blind hole area 201 is compatible with higher-performance photosensitive devices, and more obvious pits are more easily formed in the larger-sized blind hole area 201, so that narrow frames are not facilitated to be realized; the blind hole region 201 with a smaller size is not easy to have obvious depressions, is beneficial to realizing a narrow frame, but cannot be compatible with a photosensitive device with a larger area. In some vehicle-mounted display scenes, the blind hole area 201 can be set to have a larger size so as to be compatible with high-performance photosensitive devices, and meanwhile, imaging distortion can be reduced through the arrangement of the cover plate in the embodiment of the application, so that the blind hole area 201 is compatible with the high-performance photosensitive devices and has smaller imaging distortion, for example, the diameter range of the blind hole area 201 is 3-100 mm, and specifically, the blind hole area can be 6-52 mm.

In the embodiment of the application, the blind hole area 201 is not provided with the liquid crystal support column 221, so that when the size of the blind hole area 201 is larger, the array substrate 21 and the color film substrate 23 of the blind hole area 201 are easy to be recessed inwards, so that the thickness of the liquid crystal layer 22 of the blind hole area 201 is uneven, and the characteristics of thin middle and thick edge are mainly reflected, so that the image distortion is easy to exist when the photosensitive device arranged in the blind hole area 201 is photographed.

In the embodiment of the application, the color film substrate 23 can be provided with a certain concave in the blind hole area 201, so that the color film substrate 23 and the array substrate 21 are concave in the blind hole area 201 at the same time, the liquid crystal layer 22 of the blind hole area 201 has uniform thickness, and the distortion of the photosensitive device of the blind hole area 201 is improved. Specifically, a portion of the array substrate 21 located in the blind hole area 201 may be referred to as a first portion, and a portion of the array substrate 21 located in the non-blind hole area 202 may be referred to as a second portion, where at least a portion of the first portion is recessed toward the color film substrate 23 with respect to the second portion; the portion of the color film substrate 23 located in the blind hole region 201 may be denoted as a third portion, and the portion of the color film substrate 23 located in the non-blind hole region 202 may be denoted as a fourth portion, where at least a portion of the third portion is recessed toward a side facing away from the array substrate 21 with respect to the fourth portion. That is, there is a recessed portion in the first portion and a recessed portion in the third portion.

In particular, the projection of the concave area of the array substrate 21 on the surface of the color film substrate 23 and the area where the concave area of the color film substrate 23 is located have overlapping areas, that is, in the overlapping areas, the array substrate 21 and the color film substrate 23 are concave towards the same direction, and the distance between the two is relatively uniform.

As a possible implementation manner, the whole area of the first portion may be used as a concave area, the whole area of the third portion may be used as a concave area, as shown in fig. 6 and 7, that is, the whole first portion of the array substrate 21 located in the blind hole area 201 may be set to be concave toward the color film substrate 23 with respect to the second portion of the non-blind hole area 202, the whole third portion of the color film substrate 23 located in the blind hole area 201 may be concave toward the side away from the array substrate 21 with respect to the fourth portion located in the non-blind hole area 202, and since the first portion of the blind hole area 201 and the third portion of the blind hole area 201 are disposed opposite to each other, the concave area of the array substrate 21 and the concave area of the color film substrate 23 are opposite to each other, and the projections of the two in the longitudinal direction have overlapping areas, so that the thickness of the liquid crystal cell in the blind hole area 201 has higher uniformity. Wherein the central position of the first portion is recessed to a greater extent, and the central position of the third portion is recessed to a greater extent.

As another possible embodiment, the partial area 2001 of the first portion may be used as a concave area, the partial area 2002 of the third portion may be used as a concave area, as shown in fig. 8, that is, a portion of the array substrate 21 located in the blind hole area 201 may be set to be concave toward the color film substrate 23 with respect to the second portion of the non-blind hole area 202, a portion of the color film substrate 23 located in the third portion of the blind hole area 201 is concave toward the side away from the array substrate 21 with respect to the fourth portion located in the non-blind hole area 202, and a projection of the concave area of the array substrate 21 on the surface of the color film substrate 23 and an area where the concave area of the color film substrate 23 is located have an overlapping area. The concave area of the array substrate 21 is generally located at the center of the first portion, and the concave area of the color film substrate 23 is generally located at the center of the third portion.

In the embodiment of the application, the recess distance of the central area of the first portion and the recess distance of the central position of the third portion may be set to be relatively close, that is, the difference between the recess distance of the central position of the first portion and the recess distance of the central position of the third portion is smaller than a preset value, and the preset value may be an allowable maximum error value, which is determined according to the process capability and the photosensitive device parameters.

Specifically, the recess distance of the portion of the array substrate 21 located at the center position of the blind hole region 201 is determined according to the difference between the theoretical cell thickness of the liquid crystal layer located at the center position of the blind hole region and the actual cell thickness of the liquid crystal layer located at the center position of the blind hole region when the color film substrate and the cover plate are not bonded. This is because after the color film substrate 23 and the array substrate 21 are attached, the color film substrate 23 in the blind hole region 201 has an upward recess, and the array substrate 21 in the blind hole region 201 has a downward recess, so that the actual cell thickness of the liquid crystal layer is smaller than the theoretical cell thickness. Generally, the recess distance of the portion of the array substrate 21 located at the center of the blind hole area 201 is substantially the same as the recess distance of the portion of the color film substrate 21 located at the center of the blind hole area 201, so that the recess distance of the portion of the array substrate 21 located at the center of the blind hole area 201 can be calculated by testing the actual thickness of the liquid crystal layer located at the center of the blind hole area.

Specifically, the recess distance of the portion of the array substrate 21 located at the center position of the blind hole region 201 may be a half of the difference between the theoretical cell thickness d1 (e.g., the cell thickness in fig. 1) of the liquid crystal layer located at the center position of the blind hole region and the actual cell thickness d2 (e.g., the cell thickness in fig. 2) of the liquid crystal layer, which is expressed as (d 1-d 2)/2. The recess distance of the portion of the color film substrate 23 located at the center position of the blind hole area 201 is determined according to the difference between the theoretical cell thickness of the liquid crystal layer located at the center position of the blind hole area and the actual cell thickness of the liquid crystal layer located at the center position of the blind hole area when the color film substrate and the cover plate are not attached, for example, the recess distance may be half of the difference between the theoretical cell thickness d1 and the actual cell thickness d2 of the liquid crystal layer located at the center position of the blind hole area, so that the distance between the array substrate 21 and the color film substrate 23 in the blind hole area 201 is relatively uniform.

In this embodiment of the present application, the display panel may further include a cover plate 24 located on a side of the color film substrate 23 facing away from the array substrate 21, where the cover plate 24 is attached to the color film substrate 23, and by setting the cover plate 24, a portion of the color film substrate 23 located in the third portion of the blind hole area 201 is recessed toward a side facing away from the array substrate 21 relative to a fourth portion located in the non-blind hole area 202, as shown in fig. 6, 7 and 8. The thickness of the cover plate 24 is greater than that of the color film substrate 23, so that the cover plate 24 has larger rigidity and smaller deformation under the same stress, and when the color film substrate 23 has a recess facing the array substrate 21 and the cover plate 24 does not have a recess, the shape of the color film substrate 23 is easily influenced by the shape of the cover plate 24 to reduce the recess degree or even deform into the absence of the recess after the cover plate 24 is attached to the color film substrate 23. Therefore, the cover plate 24 where the blind hole area 201 may be disposed may also have a recess, specifically, a surface of the cover plate 24 facing the color film substrate 23 may be denoted as a first surface, a portion of the first surface located in the blind hole area 201 may be denoted as a fifth portion, a portion of the first surface located in the non-blind hole area 202 may be denoted as a sixth portion, and at least a portion of the fifth portion may be disposed to be recessed toward a side facing away from the array substrate 21 with respect to the sixth portion, so that at least a portion of the third portion of the color film substrate 23 located in the blind hole area 201 is recessed toward a side facing away from the array substrate 21 with respect to the fourth portion located in the non-blind hole area 202, specifically, a surface of the third portion facing the cover plate 24 is bonded to the fifth portion, and a surface of the fourth portion facing the cover plate 24 is bonded to the sixth portion.

Of course, when the entire area of the first portion is taken as the concave area and the entire area of the third portion is taken as the concave area, the entire area of the fifth portion may be set as the concave area; when the partial region of the first portion is used as the concave region and the partial region of the third portion is used as the concave region, the partial region of the fifth portion may be set as the concave region, and the projection of the concave region of the first surface of the cover plate 24 on the surface of the color film substrate 23 and the region where the concave region of the color film substrate 23 is located have overlapping regions. When the concave area of the array substrate 21 is located at the center of the first portion and the concave area of the color film substrate 23 is located at the center of the third portion, the concave area of the first surface of the cover plate 24 is located at the center of the fifth portion.

In particular, the recess distance y of the recess region of the first surface of the cover plate 24 may be determined according to the recess distance x of the recess region of the array substrate 21, so that after the cover plate 24 is attached to the color film substrate 23, the recess region of the color film substrate 23 may also have the recess distance y, and the difference between the recess distance x and the recess distance y is smaller than a preset value.

In the embodiment of the present application, the recess distance x and the recess distance y may be represented by a recess distance distribution, for example, the recess distance y distribution of the recess region of the first surface of the cover plate 24 may be determined according to the recess distance x distribution of each position of the recess region of the array substrate 21, so as to determine the recess distance distribution of the recess region of the color film substrate 23; the recess distance x and the recess distance y may also be represented by a recess distance of the center position of the recess region, for example, the recess distance y of the center position of the recess region of the first surface of the cover plate 24 may be determined according to the recess distance x of the center position of the recess region of the array substrate 21, thereby determining the recess distance of the center position of the recess region of the color film substrate 23.

The depression distance of the portion of the array substrate 21 located at the center of the blind hole region 201 may be half of the difference between the theoretical cell thickness d1 (e.g., the cell thickness in fig. 1) of the liquid crystal layer located at the center of the blind hole region and the actual cell thickness d2 (e.g., the cell thickness in fig. 2) of the liquid crystal layer, expressed as (d 1-d 2)/2, and the depression distance of the portion of the first surface of the cover plate 24 located at the center of the blind hole region 201 may be half of the difference between the theoretical cell thickness d1 (e.g., the cell thickness in fig. 1) of the liquid crystal layer located at the center of the blind hole region and the actual cell thickness d2 (e.g., the cell thickness in fig. 2) of the liquid crystal layer, and may be expressed as (d 1-d 2)/2.

In the embodiment of the present application, the surface of the cover plate 24 facing away from the color film substrate 23 may be denoted as a second surface, where the second surface is a surface facing the user after the display panel is put into use. The portion of the second surface located in the blind hole region 201 may be referred to as a seventh portion, the portion of the second surface located in the non-blind hole region 202 may be referred to as an eighth portion, and at least a portion of the seventh portion may be disposed to protrude toward a side away from the array substrate 21 with respect to the eighth portion, and the protruding position of the seventh portion and the recessed position of the fifth portion may be disposed opposite to each other, so that the thickness of the cover plate 24 is substantially the same, and thus the light passes through the cover plate 24 having substantially the same thickness in the blind hole region and has less distortion.

Of course, the seventh portion may not have a protrusion with respect to the second portion, i.e. the seventh portion and the eighth portion may form a smooth plane or curved surface, so that no additional protrusion needs to be provided towards the second surface of the user, which does not affect the aesthetic appearance and improves the user experience.

In the embodiment of the present application, the cover plate 24 may be formed by a thermal bending process, so that the first surface of the cover plate 24 located in the fifth portion of the blind hole region 201 is at least partially recessed toward a side facing away from the array substrate 21 relative to the sixth portion located in the non-blind hole region 202. Specifically, the material of the cover plate 24 may be glass, referring to fig. 9, which is a schematic diagram of a forming manner of a cover plate in an embodiment of the present application, the initial plate 24 ' is heated to a softening point, referring to fig. 9A, the initial plate 24 ' is placed in a smooth mold, force is applied to the glass by the mold to bend the glass to form, and after cooling, the shape of the initial plate 24 ' is fixed to form the cover plate 24 having a concave area on the first surface, referring to fig. 9B. Of course, the first surface of the cover plate 24 may also have concave regions and the second surface may have convex regions by applying force to the glass through the mold.

According to practical requirements, one blind hole area 201 may be disposed in the same display panel, or a plurality of blind hole areas 201 may be disposed.

Specifically, when one blind hole area 201 is provided, the blind hole area 201 is provided at different positions, so that the photosensitive devices of the blind hole area 201 are opposite to different positions, and objects at different positions are photographed. The blind hole region 201 may be disposed in a central region of the display panel, as shown in fig. 6, 7 and 8, and the blind hole region 201 may also be disposed in an edge region of the display panel, as shown in fig. 10, which is a schematic structural diagram of another display panel according to an embodiment of the present application.

Specifically, when the blind hole areas 201 are disposed, the blind hole areas 201 may face different positions, so that the photosensitive devices of the blind hole areas 201 face different positions, and objects at different positions are photographed. The blind hole regions 201 may be disposed in a central region and/or an edge region of the display panel, and referring to fig. 11, 12 and 13, schematic structural diagrams of three other display panels according to an embodiment of the present application are provided. For example, the plurality of blind hole regions 201 may be all disposed in the central region, as shown with reference to fig. 11; the blind hole regions 201 may be disposed in the edge region, as shown in fig. 12; the plurality of blind hole regions 201 may also have a portion disposed in the center region and another portion disposed in the edge region, as shown with reference to fig. 13.

The embodiment of the application provides a display panel, which can be provided with a blind hole area and a non-blind hole area outside the blind hole area, wherein the display panel comprises a color film substrate, an array substrate and a liquid crystal layer between the color film substrate and the array substrate, one side of the color film substrate, which is away from the array substrate, is provided with a cover plate, at least part of a first part of the array substrate, which is positioned in the blind hole area, is sunken towards one side of the color film substrate relative to a second part, which is positioned in the non-blind hole area, a shape of the cover plate, which is positioned towards the first surface of the color film substrate, for example, at least part of a fifth part, which is positioned in the blind hole area, is sunken towards one side, which is away from the array substrate relative to a sixth part, which is positioned in the non-blind hole area, at least part of the color film substrate in the third part of the blind hole area is sunken towards one side deviating from the array substrate relative to the fourth part of the non-blind hole area, the projection of the sunken part of the array substrate on the first surface of the cover plate and the region where the sunken part of the first surface is located are provided with overlapping regions, that is, the first part of the array substrate in the blind hole area and the third part of the color film substrate in the blind hole area deform towards the same direction, and the deformed positions are overlapped, so that the uniformity of the distance between the color film substrate and the array substrate in the blind hole area is improved, the uniformity of the thickness of the liquid crystal box in the blind hole area is improved, the problem that the thickness of the liquid crystal box in the blind hole area is uneven due to the fact that the blind hole area is only sunken by the array substrate is solved, and the imaging distortion of a photosensitive device in the blind hole area is improved.

Based on the display panel provided by the above embodiment, the embodiment of the application further provides a display device, and referring to fig. 14, which is a schematic structural diagram of the display device provided by the embodiment of the application, the display device includes a photosensitive device 30 and the aforementioned display panel, the photosensitive device 30 is located on a side of the array substrate 21 facing away from the color film substrate 23, and the projection of the photosensitive device 30 on the surface of the array substrate 21 and the blind hole area 201 have overlapping areas. The light sensing device 30 may be a photodetector, a light sensing device, or the like, and the display device may be a vehicle-mounted display device.

Based on the display panel provided by the foregoing embodiment, the embodiment of the present application further provides a method for manufacturing a display panel, and referring to fig. 15, which is a flowchart of the method for manufacturing a display panel provided by the embodiment of the present application, the display panel includes a blind hole area 201 and a non-blind hole area 202 outside the blind hole area 201, and the method may include:

s101, fixing the color film substrate 23 and the array substrate 21, and referring to FIG. 2.

In the embodiment of the application, the color film substrate 23 and the array substrate 21 are oppositely arranged. The color film substrate 23 is a substrate facing the user during use, and the array substrate 21 is a substrate facing the photosensitive device during use. The photosensitive device may be, for example, a camera or the like. The array substrate 21 includes a first substrate and a first functional layer, where the first functional layer includes thin film transistors arranged in an array, at least one thin film transistor is disposed corresponding to each pixel, and a material of the first substrate may be glass or polyimide. The color film substrate 23 may include a second substrate and a second functional layer, the second functional layer includes a color filter, the same pixel includes a set of color filters, the set of color filters includes a red filter, a green filter, and a blue filter, and the material of the second substrate may be glass or polyimide, etc.

The color film substrate 23 and the array substrate 21 are oppositely arranged, and the shapes of the color film substrate and the array substrate are consistent, so that the thickness of the liquid crystal layer 22 between the color film substrate and the array substrate is relatively uniform. For example, the color film substrate 23 and the array substrate 21 may be planar substrates, so as to form a planar display panel; the color film substrate 23 and the array substrate 21 may be curved substrates, so as to form a curved (curved) display panel.

In the embodiment of the application, the display panel is provided with the blind hole area 201 and the non-blind hole area 202 outside the blind hole, the blind hole area 201 is used for arranging the photosensitive device without a display function, and the non-blind hole area 202 is used for realizing a normal display function, so that the light transmittance of the display panel in the blind hole area 201 is larger than that of the non-blind hole area 202, and the photosensitive device in the blind hole area 201 can have a better shooting effect. Specifically, the structures affecting light transmission in the color film substrate 23 and the array substrate 21 of the blind hole area 201 may be designed as open holes, i.e. the blind hole area 201 may not be provided with the first functional layer and the second functional layer, i.e. the color filter and the thin film transistor; or no film layer affecting light transmission in the first functional layer and the second functional layer may be disposed in the blind hole region 201, for example, no metal layer or metal interconnection line is disposed, and the metal layer may be a gate metal layer, a source metal layer, and a drain metal layer. In addition, the blind via region 201 may not be provided with the liquid crystal support columns 221 to ensure high light transmittance of the blind via region 201, so that the liquid crystal support columns 221 are disposed in the non-blind via region 202. In addition, when the display panel has a touch function, the blind hole area 201 is not provided with a touch layer or a film layer influencing light transmission in the touch layer, for example, the blind hole area 201 is not provided with a touch signal line.

The color film substrate 23 and the array substrate 21 can be paired, frame glue can be coated on the color film substrate 23, liquid crystal is dripped on the array substrate 21, vacuum is pumped in a vacuum chamber after the color film substrate 23 and the array substrate 21 are paired, air between the color film substrate 23 and the array substrate 21 is pumped away, vacuum is broken after the vacuum degree reaches a preset value, and the frame glue is extruded under the action of atmospheric pressure, so that the color film substrate 23 and the array substrate 21 are firmly bonded together. When the size of the blind hole area 201 is larger, the array substrate 21 and the color film substrate 23 in the blind hole area 201 are prone to be recessed inwards, specifically, a portion of the array substrate 21 located in the blind hole area 201 may be referred to as a first portion, a portion of the array substrate 21 located in the non-blind hole area 202 may be referred to as a second portion, and at least a portion of the first portion is recessed towards one side of the color film substrate relative to the second portion; the portion of the color film substrate 23 located in the blind hole region 201 is denoted as a third portion, and the portion of the color film substrate 23 located in the non-blind hole region 202 is denoted as a fourth portion, so that at least part of the third portion is recessed toward the side of the array substrate relative to the fourth portion. The color film substrate 23 may be located below the array substrate 21, and since the blind hole area is not provided with the liquid crystal support columns, the array substrate 21 in the blind hole area may be concave, while the color film substrate 23 in the blind hole area may be concave upward, as shown in fig. 2, so that the thickness of the liquid crystal cell in the blind hole area may be uneven.

S102, a cover plate 24 is arranged on one side of the color film substrate 23, which is far away from the array substrate 21, and the color film substrate is shown with reference to fig. 6-8 and 10-13.

In this embodiment of the present application, the display panel may further include a cover plate 24 located on a side of the color film substrate 23 facing away from the array substrate 21, where the cover plate 24 is attached to the color film substrate 23. The thickness of the cover plate 24 is greater than that of the color film substrate 23, so that the cover plate 24 has larger rigidity and smaller deformation under the same stress, and when the color film substrate 23 is concave and the cover plate 24 is not concave, the shape of the color film substrate 23 is easily affected by the shape of the cover plate 24 to reduce the concave degree or even deform into no concave after the cover plate 24 is attached to the color film substrate 23.

That is, the color film substrate 23 may be disposed to have a certain recess in the blind hole region 201, so that the color film substrate 23 and the array substrate 21 simultaneously have recesses in the blind hole region 201, so that the liquid crystal layer 22 in the blind hole region 201 has a uniform thickness, and distortion of the photosensitive device in the blind hole region 201 is improved. Specifically, a portion of the array substrate 21 located in the blind hole area 201 may be referred to as a first portion, and a portion of the array substrate 21 located in the non-blind hole area 202 may be referred to as a second portion, where at least a portion of the first portion is recessed toward the color film substrate 23 with respect to the second portion; the portion of the color film substrate 23 located in the blind hole region 201 may be denoted as a third portion, and the portion of the color film substrate 23 located in the non-blind hole region 202 may be denoted as a fourth portion, where at least a portion of the third portion is recessed toward a side facing away from the array substrate 21 with respect to the fourth portion. That is, there is a recessed portion in the first portion and a recessed portion in the third portion.

As a possible implementation manner, the whole area of the first portion may be used as a concave area, the whole area of the third portion may be used as a concave area, as shown in fig. 6 and 7, that is, the whole first portion of the array substrate 21 located in the blind hole area 201 may be set to be concave toward the color film substrate 23 with respect to the second portion of the non-blind hole area 202, and the whole third portion of the color film substrate 23 located in the blind hole area 201 may be set to be concave toward the side away from the array substrate 21 with respect to the fourth portion of the non-blind hole area 202.

As another possible embodiment, the partial area 2001 of the first portion may be used as a concave area, the partial area 2002 of the third portion may be used as a concave area, as shown in fig. 8, that is, a portion of the array substrate 21 located in the blind hole area 201 may be set to be concave toward the color film substrate 23 with respect to the second portion of the non-blind hole area 202, a portion of the color film substrate 23 located in the third portion of the blind hole area 201 is concave toward the side away from the array substrate 21 with respect to the fourth portion located in the non-blind hole area 202, and a projection of the concave area of the array substrate 21 on the surface of the color film substrate 23 and an area where the concave area of the color film substrate 23 is located have an overlapping area.

Therefore, the cover plate 24 where the blind hole area 201 may be disposed may also have a recess, specifically, a surface of the cover plate 24 facing the color film substrate 23 may be denoted as a first surface, a surface facing away from the color film substrate 23 may be denoted as a second surface, a portion of the first surface located in the blind hole area 201 may be denoted as a fifth portion, a portion of the first surface located in the non-blind hole area 202 may be denoted as a sixth portion, at least a portion of the fifth portion may be disposed to be recessed toward a side facing away from the array substrate 21 with respect to the sixth portion, and by disposing the cover plate 24, the color film substrate 23 is disposed in the third portion located in the blind hole area 201 to be recessed toward a side facing away from the array substrate 21 with respect to a fourth portion located in the non-blind hole area 202 after being bonded to the cover plate 24, wherein the surface facing the cover plate 24 and the fifth portion of the third portion are bonded, and the surface facing the cover plate 24 of the fourth portion is bonded to the sixth portion. Specifically, the projection of the concave portion of the array substrate 21 on the first surface of the cover plate 24 and the area where the concave portion of the first surface of the cover plate 24 is located have overlapping areas.

In the embodiment of the present application, the cover plate 24 may be formed by a thermal bending process, so that at least a portion of the fifth portion of the first surface located in the blind hole region 201 is recessed toward a side facing away from the array substrate 21 relative to the sixth portion located in the non-blind hole region 202.

Specifically, the material of the cover plate 24 may be glass, the initial plate 24 ' is heated to a softening point, the initial plate 24 ' is placed in a smooth mold, force is applied to the glass by the mold to bend the glass into a shape, and the shape of the initial plate 24 ' is fixed after cooling to form the cover plate 24 having a concave region on the first surface. Of course, the first surface of the cover plate 24 may also have concave regions and the second surface may have convex regions by applying force to the glass through the mold.

The initial plate 24' is obtained by cutting, and is heated after being cleaned, after the cover plate 24 with the concave area on the first surface is obtained, the cover plate 24 can be polished and strengthened, then the cover plate 24 is attached to the color film substrate 23, and the cover plate 24 is attached to the color film substrate 23 by using optical cement.

The embodiment of the application provides a manufacturing method of a display panel, the display panel can be provided with a blind hole area and a non-blind hole area outside the blind hole area, after a color film substrate and an array substrate are fixed, a cover plate can be arranged on one side of the color film substrate, which is far away from the array substrate, a liquid crystal layer is arranged between the color film substrate and the array substrate, at least part of the array substrate is sunken towards one side of the color film substrate relative to a second part which is positioned in the non-blind hole area, at least part of the color film substrate is sunken towards one side of the array substrate relative to a fourth part which is positioned in the non-blind hole area, one side surface of the cover plate, which is positioned towards the color film substrate, is marked as a first surface, at least part of the first surface is sunken towards one side, which is far away from the array substrate, relative to a sixth part which is positioned in the non-blind hole area, in a fifth part of the blind hole area, at least part of the color film substrate in the third part of the blind hole area is sunken towards one side deviating from the array substrate relative to the fourth part of the non-blind hole area, the projection of the sunken part of the array substrate on the first surface of the cover plate and the region where the sunken part of the first surface is located are provided with overlapping regions, that is, the first part of the array substrate in the blind hole area and the third part of the color film substrate in the blind hole area deform towards the same direction, and the deformed positions are overlapped, so that the uniformity of the distance between the color film substrate and the array substrate in the blind hole area is improved, the uniformity of the thickness of the liquid crystal box in the blind hole area is improved, the problem that the thickness of the liquid crystal box in the blind hole area is uneven due to the fact that the blind hole area is only sunken by the array substrate is solved, and the imaging distortion of a photosensitive device in the blind hole area is improved.

When introducing elements of various embodiments of the present application, the articles "a," "an," "the," and "said" are intended to mean that there are one or more of the elements. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements other than the listed elements.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing is merely a preferred embodiment of the present application, and the present application has been disclosed in the above description of the preferred embodiment, but is not limited thereto. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present application or modifications to equivalent embodiments using the methods and technical contents disclosed above, without departing from the scope of the technical solution of the present application. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A display panel having a blind via region and a non-blind via region outside the blind via region, comprising:

2. The display panel of claim 1, wherein all first portions of the array substrate in the blind hole region are recessed toward a side of the color film substrate relative to second portions of the array substrate in the non-blind hole region, and all third portions of the array substrate in the blind hole region are recessed toward a side of the array substrate facing away from fourth portions of the array substrate relative to the non-blind hole region.

3. The display panel of claim 1, wherein the cover plate is configured to recess the first surface at least partially in a fifth portion of the blind via region toward a side facing away from the array substrate with respect to a sixth portion of the non-blind via region by a thermal bending process.

4. The display panel according to claim 1, wherein a difference between a recess distance of a center position of the first portion and a recess distance of a center position of the third portion is smaller than a preset value.

5. The display panel of claim 1, wherein the color film substrate and the array substrate are curved substrates, and the centers of curvature of the color film substrate and the array substrate are located at a side of the color film substrate facing away from the array substrate.

6. The display panel of claim 5, wherein the color film substrate and the array substrate have a curvature ranging from 500 to 5000mm.

7. The display panel of claim 1, wherein the display panel comprises a plurality of blind via regions.

8. The display panel of claim 7, wherein the plurality of blind via regions are disposed in a center region and/or an edge region of the display panel.

9. The display panel of claim 1, wherein the light transmittance of the display panel in the blind hole region is greater than the light transmittance of the non-blind hole region.

10. The display panel of claim 1, wherein the array substrate comprises a first substrate and a first functional layer, and the color film substrate comprises a second substrate and a second functional layer.

11. The display panel according to claim 1, wherein the color film substrate and/or the array substrate has liquid crystal support columns disposed in the non-blind holes for supporting liquid crystal.

12. The display panel of claim 1, wherein the blind hole region has a diameter ranging from 3mm to 100mm.

13. The display panel according to claim 1, wherein a recess distance of a portion of the cover plate located at a center position of the blind hole region is half a difference between a theoretical cell thickness of the liquid crystal layer located at the center position of the blind hole region and an actual cell thickness of the liquid crystal layer located at the center position of the blind hole region when the color film substrate and the cover plate are not bonded.

14. A display device comprising a light-sensing device and the display panel of any one of claims 1-13; the photosensitive device is located on one side, away from the color film substrate, of the array substrate, and the projection of the photosensitive device on the surface of the array substrate and the blind hole area are provided with overlapping areas.

15. A method of manufacturing a display panel, the display panel comprising a blind via region and a non-blind via region outside the blind via region, the method comprising:

a cover plate is arranged on one side of the color film substrate, which is away from the array substrate; the cover plate is attached to the color film substrate; the surface of the cover plate, which faces the color film substrate, is used as a first surface, at least part of the first surface, which is positioned in the fifth part of the blind hole area, is sunken towards the side, which is away from the array substrate, relative to the sixth part, which is positioned in the non-blind hole area, so that after the color film substrate is attached to the cover plate, at least part of the third part, which is positioned in the blind hole area, is sunken towards the side, which is away from the array substrate, relative to the fourth part, which is positioned in the non-blind hole area; the projection of the concave part of the array substrate on the first surface of the cover plate and the area where the concave part of the first surface is located have an overlapping area.

16. The method of claim 15, wherein all first portions of the array substrate in the blind hole region are recessed toward a side of the color film substrate relative to second portions of the array substrate in the non-blind hole region, all third portions of the array substrate in the blind hole region are recessed toward a side of the array substrate relative to fourth portions of the array substrate in the non-blind hole region, and all fifth portions of the array substrate in the blind hole region are recessed toward a side of the array substrate relative to sixth portions of the array substrate in the non-blind hole region.

17. The method of claim 15, wherein the cover plate is formed by a thermal bending process such that at least a portion of the first surface in the fifth portion of the blind via region is recessed toward a side facing away from the array substrate relative to the sixth portion in the non-blind via region.

18. The method of claim 15, wherein a difference between the recess distance of the center position of the first portion and the recess distance of the center position of the fifth portion is less than a preset value.