Display panel and display device

Abstract

A display panel and a display device, the display panel includes a first substrate (11) and a second substrate (12); the first substrate (11) includes a first base (1101) and a black matrix layer (111) disposed on the first base (1101); the second substrate (12) includes a second base (1201) and a plurality of first signal lines (121) disposed on the second base (1201), and a plurality of first signal lines (121) are provided with extensions along the second direction (Y) and arranged along the fourth direction (W), and in the curved surface where the second substrate (12) is located, the fourth direction (W) intersects with the second direction (Y); the black matrix layer (111) includes a plurality of first body structures (a1) corresponding to the plurality of first signal lines (121), and a first compensation structure (b1) is provided on one side of at least one first body structure (a1), and in the curved surface where the first substrate (11) is located, the first body structure (a1) and the first compensation structure (b1) extend along the second direction (Y) and are arranged along the fourth direction (W), and in the curved surface where the first substrate (11) is located, the fourth direction (W) intersects with the second direction (Y); the orthographic projection of any one of the first signal lines (121) on the second substrate (12) is located within the orthographic projection range of the corresponding first body structure (a1) and the first compensation structure (b1) on the second substrate (12).

Description

Technical Field

[0001] Embodiments of the present disclosure relate to, but are not limited to, the field of display technology, and particularly to a display panel and a display device. Background Art

[0002] In recent years, curved display panels have received more favor due to their better viewing angle characteristics and wide field of view. Curved display panels have been widely used in large-sized display products such as computers, televisions (TVs), medical monitoring devices, and in-vehicle central control devices. Summary of the Invention

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

[0004] Embodiments of the present disclosure provide a display panel, including: a first substrate and a second substrate disposed opposite to each other, wherein the first substrate and the second substrate are in a curved surface structure;

[0005] The first substrate includes a first base, and a black matrix layer disposed on a side of the first base close to the second substrate;

[0006] The second substrate includes a second base, and a plurality of first signal lines disposed on a side of the second base close to the first substrate, the plurality of first signal lines extending in a second direction and arranged in a fourth direction, and the fourth direction intersects with the second direction within the curved surface where the second substrate is located;

[0007] The black matrix layer includes a plurality of first body structures corresponding to the plurality of first signal lines, and a first compensation structure is disposed on one side of at least one of the first body structures. Within the curved surface where the first substrate is located, the first body structures and the first compensation structure extend in the second direction and are arranged in the fourth direction, and the fourth direction intersects with the second direction within the curved surface where the first substrate is located;

[0008] A positive projection of any one of the first signal lines on the second substrate is located within a positive projection range of the corresponding first body structure and the first compensation structure on the second substrate.

[0009] In an exemplary embodiment, the display panel is bent toward the side of the second substrate away from the first substrate. In the fourth direction, in any set of the first body structure and the first compensation structure, the first compensation structure is located between the first body structure and the first median line; or, the display panel is bent toward the side of the first substrate away from the second substrate. In the fourth direction, in any set of the first body structure and the first compensation structure, the first body structure is located between the first compensation structure and the first median line; wherein, the first median line is the median line of the display panel extending in the second direction.

[0010] In an exemplary embodiment, the display panel includes a first side and a second side oppositely arranged in the fourth direction. On the curved surface where the display panel is located, between the first median line and the first side, the size of the first compensation structure gradually decreases in the fourth direction from the first compensation structure near the third median line position to the first compensation structure far from the third median line position; between the first median line and the second side, the size of the first compensation structure gradually decreases in the fourth direction from the first compensation structure near the fourth median line position to the first compensation structure far from the fourth median line position;

[0011] The third median line is the median line of the display panel extending in the second direction located between the first median line and the first side, and the fourth median line is the median line of the display panel extending in the second direction located between the first median line and the second side.

[0012] In an exemplary embodiment, within the curved surface where the display panel is located, the display panel is divided into multiple regions in the fourth direction. The multiple regions include a first region and two kth regions, where 2 ≤ k ≤ N, and N is a positive integer greater than or equal to 2. For any value of k, the two corresponding regions are symmetrically arranged with respect to the first median line in the fourth direction;

[0013] The sizes of the multiple first compensation structures located in the first region are the same in the fourth direction, and the sizes of the multiple first compensation structures located in the regions corresponding to the same value of k are the same in the fourth direction.

[0014] In an exemplary embodiment, N = 3. The multiple regions include a first region, two second regions, and two third regions. The first region is symmetrically arranged with respect to the first median line in the fourth direction, the two second regions are symmetrically arranged with respect to the first median line in the fourth direction, and the two third regions are symmetrically arranged with respect to the first median line in the fourth direction;

[0015] A display panel located between the first middle line and the first side, where the first region and the third region are symmetrically arranged with respect to the third middle line in the fourth direction, and the second region is symmetrically arranged with respect to the third middle line in the fourth direction; A display panel located between the first middle line and the second side, where the first region and the third region are symmetrically arranged with respect to the fourth middle line in the fourth direction, and the second region is symmetrically arranged with respect to the fourth middle line in the fourth direction.

[0016] In an exemplary embodiment, within the curved surface where the display panel is located, on each side of the first middle line, N - 2 concentric annular regions are divided. The region at the inner center position of the annular region is the first region, and the region at the outer periphery of the annular region is the Nth region. Any one of the Jth regions on the display panel includes two, where J ranges from 1 to N. The two Jth regions are located on both sides of the first middle line and are symmetric with respect to the first middle line in the fourth direction. Any one of the Jth regions is symmetrically arranged with respect to the second middle line, and the second middle line is the middle line along which the display panel extends in the fourth direction.

[0017] The dimensions of the multiple first compensation structures located at the first region position in the fourth direction are the same, and the dimensions of the multiple first compensation structures located in the regions corresponding to the same J value in the fourth direction are the same.

[0018] In an exemplary embodiment, N = 3. The multiple regions include two first regions, two second regions, and two third regions. The second region is an annular region. The first region is located at the central position of the annular region of the second region, and the third region is located at the outer peripheral region of the annular region of the second region.

[0019] In an exemplary embodiment, on the curved surface where the display panel is located, on the same side of the first middle line, the dimensions of the first compensation structures gradually decrease in the fourth direction from the first compensation structures in the region close to the central position of the annular region to the first compensation structures in the region far from the central position of the annular region.

[0020] In an exemplary embodiment, within the curved surface where the display panel is located, the dimension of the first compensation structure in the fourth direction is set according to at least one of the dimensions of the first substrate and the second substrate in the bending direction, the dimensions of the first substrate and the second substrate in the second direction, the dimensions of the first substrate and the second substrate in the fourth direction, and the radius of curvature of the display panel. The radius of curvature of the display panel is the radius of curvature of the curved surface where the display panel is located.

[0021] In an exemplary embodiment, within the curved surface where the display panel is located, the dimension of the first compensation structure in the fourth direction is proportional to the dimensions of the first substrate and the second substrate in the bending direction.

[0022] In an exemplary embodiment, when the dimensions of the first substrate and the second substrate in the second direction, the dimensions of the first substrate and the second substrate in the fourth direction, and the radius of curvature of the display panel all remain unchanged, the dimension of the first compensation structure in the fourth direction has a linear relationship with the sum of the dimensions of the first substrate and the second substrate in the bending direction.

[0023] In an exemplary embodiment, in a display panel with a size of 14.6 inches and a radius of curvature of 780 millimeters, the relationship between the dimension of the first compensation structure in the fourth direction and the dimensions of the first substrate and the second substrate in the bending direction is expressed by the following formula:

[0024] y = 30.314x - 0.1673;

[0025] where x is the sum of the dimensions of the first substrate and the second substrate in the bending direction, and y is the dimension of the first compensation structure in the fourth direction; x is greater than or equal to 0.3 micrometers and less than or equal to 1 micrometer; y is greater than or equal to 8 micrometers and less than or equal to 30 micrometers.

[0026] In an exemplary embodiment, within the curved surface where the display panel is located, the dimension of the first compensation structure in the fourth direction is proportional to the dimensions of the first substrate and the second substrate in the fourth direction.

[0027] In an exemplary embodiment, when the dimensions of the first substrate and the second substrate in the bending direction, the aspect ratio of the display panel, and the radius of curvature of the display panel all remain unchanged, the dimension of the first compensation structure in the fourth direction has a linear relationship with the dimensions of the first substrate and the second substrate in the fourth direction; the aspect ratio is the ratio of the dimension of the display panel in the second direction to the dimension of the display panel in the fourth direction.

[0028] In an exemplary embodiment, in a display panel where the dimensions of the first substrate and the second substrate in the bending direction are both 0.2 micrometers, the radius of curvature is 780 millimeters, and the aspect ratio of the display panel is 55%, the relationship between the dimension of the first compensation structure in the fourth direction and the dimensions of the first substrate and the second substrate in the fourth direction is expressed by the following formula:

[0029] y = 0.0364x + 0.0131;

[0030] where x is the dimension of the first substrate and the second substrate in the fourth direction, and y is the dimension of the first compensation structure in the fourth direction; x is greater than or equal to 250 millimeters and less than or equal to 550 millimeters; y is greater than or equal to 8 micrometers and less than or equal to 20 micrometers.

[0031] In an exemplary embodiment, in a display panel where the dimensions of the first substrate and the second substrate in the bending direction are both 0.2 mm, the radius of curvature is 780 mm, and the aspect ratio of the display panel is 37%, the relationship between the dimension of the first compensation structure in the fourth direction and the dimensions of the first substrate and the second substrate along the fourth direction is expressed by the following formula:

[0032] y = 0.0231x - 0.1021;

[0033] where x is the dimension of the first substrate and the second substrate along the fourth direction, and y is the dimension of the first compensation structure along the fourth direction; x is greater than or equal to 250 mm and less than or equal to 550 mm; y is greater than or equal to 5 μm and less than or equal to 15 μm.

[0034] In an exemplary embodiment, within the range where the aspect ratio is greater than or equal to 10% and less than or equal to 60%, when the radius of curvature, the dimensions of the first substrate and the second substrate in the bending direction, and the dimensions of the first substrate and the second substrate along the fourth direction remain unchanged, the dimension of the first compensation structure in the fourth direction is proportional to the aspect ratio;

[0035] The aspect ratio is the ratio of the dimension of the display panel in the second direction to the dimension of the display panel in the fourth direction.

[0036] In an exemplary embodiment, in a display panel where the radius of curvature is 780 mm, the dimensions of the first substrate and the second substrate in the bending direction are both 0.15 mm, and the dimensions of the first substrate and the second substrate along the fourth direction are 327.7 mm, the relationship between the dimension of the first compensation structure in the fourth direction and the aspect ratio is expressed by the following formula:

[0037] y = 19.536x - 1.823;

[0038] where x is the aspect ratio of the display panel, and y is the dimension of the first compensation structure along the fourth direction; the value range of x is greater than or equal to 10% and less than or equal to 60%; y is greater than or equal to 0.9 μm and less than or equal to 9 μm.

[0039] In an exemplary embodiment, the dimension of the first compensation structure in the fourth direction is proportional to the displacement of the display panel in the bending direction;

[0040] The displacement of the display panel in the bending direction is the vertical distance between the midline position of the curved surface structure of the display panel extending in the second direction and the midpoint position of the connection line between the two ends of the curved surface structure of the display panel.

[0041] In an exemplary embodiment, when the dimensions of the first substrate and the second substrate in the second direction, the dimensions of the first substrate and the second substrate in the fourth direction, and the dimensions of the first substrate and the second substrate in the bending direction remain unchanged, the dimension of the first compensation structure in the fourth direction has a linear relationship with the displacement amount of the display panel in the bending direction.

[0042] In an exemplary embodiment, in a display panel with a size of 12.3 inches and the dimensions of the first substrate and the second substrate in the bending direction both being 0.2 mm, the dimension of the first compensation structure in the fourth direction and the displacement amount of the display panel in the bending direction are expressed by the following formula:

[0043] y = 0.5221x - 0.017;

[0044] where x is the displacement amount of the display panel in the bending direction, and y is the dimension of the first compensation structure in the fourth direction; the value range of x is greater than or equal to 2 mm and less than or equal to 14 mm; y is greater than or equal to 1 μm and less than or equal to 8 μm.

[0045] In an exemplary embodiment, the displacement amount of the display panel in the bending direction and the radius of curvature of the display panel have the following relationship:

[0046] M = R – R*cos((L / 2) / R);

[0047] where L is the dimension of the display panel in the fourth direction, R is the radius of curvature of the surface where the display panel is located, and M is the displacement amount in the bending direction of the display panel. In an exemplary embodiment, the radius of curvature R can be 780 mm to 5000 mm, and the displacement amount M in the bending direction of the display panel can be 2 mm to 14 mm.

[0048] In an exemplary embodiment, the black matrix layer further includes a second compensation structure, and the second compensation structure and the first compensation structure are symmetrically arranged with respect to the midline extending in the second direction of the first body structure.

[0049] In an exemplary embodiment, the first substrate further includes a plurality of color resist elements disposed on the side of the first substrate close to the second substrate. In the surface where the first substrate is located, the plurality of color resist elements are alternately arranged with the first body structure and the first compensation structure in the fourth direction and extend in the second direction.

[0050] In an exemplary embodiment, the first substrate is further provided with a first alignment layer and a plurality of support structures. The black matrix layer and the plurality of color resist elements are located between the first alignment layer and the first substrate, and the support structures are disposed on the side of the first alignment layer close to the second substrate;

[0051] The black matrix layer further includes a plurality of third body structures corresponding to the plurality of support structures, and at least one of the third body structures is provided with a third compensation structure. In the curved surface where the first substrate is located, in a fourth direction, the third compensation structure is located on one side of the third body structure.

[0052] The orthographic projection of the support structure on the second substrate is within the orthographic projection ranges of the third body structure and the third compensation structure on the second substrate; there is an overlapping area between the third body structure and the first body structure; the dimensions of the third body structure and the third compensation structure in the fourth direction are greater than the dimensions of the first body structure and the first compensation structure in the fourth direction.

[0053] In an exemplary embodiment, in the curved surface where the display panel is located, the dimension of the third compensation structure in the fourth direction is set in the same manner as the dimension of the first compensation structure in the fourth direction.

[0054] In an exemplary embodiment, the display panel bends toward the side of the second substrate away from the first substrate. In the fourth direction, in any set of the third body structure and the third compensation structure, the third compensation structure is located between the third body structure and the first center line; or, the display panel bends toward the side of the first substrate away from the second substrate. In the fourth direction, in any set of the third body structure and the third compensation structure, the third body structure is located between the third compensation structure and the first center line; wherein, the first center line is the center line of the display panel extending in the second direction.

[0055] In an exemplary embodiment, a plurality of second signal lines and vias are further provided on the side of the second substrate close to the first substrate. The second signal lines extend in the fourth direction in the curved surface where the second substrate is located and are arranged in the second direction.

[0056] The black matrix layer further includes a plurality of second body structures corresponding to the plurality of second signal lines. The plurality of second body structures extend in the fourth direction in the curved surface where the first substrate is located and are arranged in the second direction.

[0057] The orthographic projection of the plurality of second signal lines and the vias on the second substrate is within the orthographic projection range of the corresponding second body structure on the second substrate.

[0058] There is an overlapping area between the first body structure, the second body structure, and the third body structure.

[0059] In an exemplary embodiment, the black matrix layer further includes a fourth compensation structure, and the fourth compensation structure and the third compensation structure are symmetrically arranged with respect to the midline of the third body structure extending in the second direction.

[0060] In an exemplary embodiment, the black matrix layer further includes a fifth compensation structure and a sixth compensation structure, and the fifth compensation structure and the sixth compensation structure are symmetrically arranged with respect to the midline of the third body structure extending in the fourth direction.

[0061] An embodiment of the present disclosure also provides a display device, including the display panel described in any of the above embodiments.

[0062] Other aspects will be apparent after reading and understanding the drawings and the detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The drawings are used to provide a further understanding of the technical solutions of the present disclosure, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present disclosure, and do not constitute a limitation to the technical solutions of the present disclosure. The shape and size of each component in the drawings do not reflect the true scale, and the purpose is only to schematically illustrate the content of the present disclosure.

[0064] Figure 1a Shown is a schematic cross-sectional structure diagram of the display panel provided by the embodiment of the present disclosure in an unbent state;

[0065] Figure 1b Shown is a schematic cross-sectional structure diagram of the display panel provided by the embodiment of the present disclosure;

[0066] Figure 1c Shown is a schematic cross-sectional structure diagram of the display panel provided by the embodiment of the present disclosure;

[0067] Figure 1d Shown is a schematic partial planar structure diagram of the display panel provided by the embodiment of the present disclosure;

[0068] Figure 1e Shown is a schematic partial planar structure diagram of the display panel provided by the embodiment of the present disclosure;

[0069] Figure 1f Shown is a schematic cross-sectional structure diagram of the display panel provided by the embodiment of the present disclosure in an unbent state;

[0070] Figure 2a Shown is a schematic planar structure diagram of a simulated display panel provided by an exemplary embodiment of the present disclosure;

[0071] Figure 2b Shown is a schematic cross-sectional structure diagram of a simulated display panel provided by an exemplary embodiment of the present disclosure;

[0072] Figure 2c and Figure 2d The figure shows a misalignment distribution diagram of a simulated display panel according to an exemplary embodiment of the present disclosure;

[0073] Figure 2e The figure shows a schematic diagram of light leakage of a curved display panel;

[0074] Figure 2f The figure shows a misalignment distribution diagram of a simulated display panel provided by an exemplary embodiment of the present disclosure;

[0075] Figure 2g The figure shows a misalignment distribution diagram of a simulated display panel provided by an exemplary embodiment of the present disclosure;

[0076] Figure 3a The figure shows a schematic diagram of the relationship between the maximum misalignment amount of a simulated curved display panel and the substrate thickness;

[0077] Figure 3b The figure shows a schematic diagram of the relationship between the maximum misalignment amount of a simulated curved display panel and the substrate thickness;

[0078] Figure 3c The figure shows a schematic diagram of the relationship between the maximum misalignment amount of a simulated curved display panel and the length of the display surface;

[0079] Figure 3d The figure shows a schematic diagram of the relationship between the maximum misalignment amount of a simulated curved display panel and the aspect ratio of the display panel;

[0080] Figure 4a The figure shows a schematic diagram of light leakage of a curved display panel;

[0081] Figure 4b The figure shows a schematic diagram of light leakage of a curved display panel with a special-shaped structure;

[0082] Figure 5a The figure shows a schematic cross-sectional structure diagram of a display panel;

[0083] Figure 5b The figure shows a schematic diagram of a partial planar structure of the display panel in an unbent state;

[0084] Figure 6a The figure shows a partial planar structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0085] Figure 6b The figure shows a schematic cross-sectional structure diagram of a display panel;

[0086] Figure 6c The figure shows a schematic cross-sectional structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0087] Figure 6d Shown is a schematic cross-sectional structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0088] Figure 7a Shown is a schematic partial planar structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0089] Figure 7b Shown is a schematic cross-sectional structure diagram of a display panel;

[0090] Figure 7c Shown is a schematic cross-sectional structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0091] Figure 7d Shown is a schematic cross-sectional structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0092] Figure 8 Shown is a schematic partial planar structure diagram of a display surface provided by an exemplary embodiment of the present disclosure;

[0093] Figure 9a Shown is a schematic partial planar structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0094] Figure 9b Shown is a schematic partial planar structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0095] Figure 10a Shown is a schematic partial planar structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0096] Figure 10b Shown is a schematic partial planar structure diagram of a display panel provided by an exemplary embodiment of the present disclosure;

[0097] Figure 11 Shown is a schematic planar structure diagram of a display panel area division provided by an exemplary embodiment of the present disclosure;

[0098] Figure 12 Shown is a schematic planar structure diagram of a display panel area division provided by an exemplary embodiment of the present disclosure. Detailed implementation manners

[0099] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The embodiments can be implemented in multiple different forms. It is easy for those of ordinary skill in the art to understand the fact that the manner and content can be transformed into various forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited only to the content described in the following embodiments. Without conflict, the embodiments and features in the embodiments of the present disclosure can be combined arbitrarily with each other. To keep the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of some known functions and known components are omitted. The accompanying drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design

[0100] The drawing ratios in the present disclosure can be used as a reference in actual processes, but are not limited thereto. For example, the thickness and spacing of each film layer, and the width and spacing of each signal line can be adjusted according to the actual situation. The drawings described in the present disclosure are only schematic diagrams of the structures, and one embodiment of the present disclosure is not limited to the shapes or values shown in the drawings, etc.

[0101] The ordinal numbers such as "first", "second", "third", etc. in this specification are set to avoid confusion of the components, rather than to limit the quantity.

[0102] In this specification, for convenience, terms indicating orientation or positional relationships such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to describe the positional relationships of the components with reference to the accompanying drawings. This is only for the convenience of describing this specification and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present disclosure. The positional relationships of the components are appropriately changed according to the directions describing each component. Therefore, it is not limited to the terms described in the specification, and can be appropriately replaced according to the situation.

[0103] In this specification, unless otherwise clearly defined and limited, the terms "mounted", "connected", and "connected" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate member, or the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0104] In this specification, "electrically connected" includes the case where components are connected together through an element having a certain electrical effect. The "element having a certain electrical effect" is not particularly limited as long as it can transfer electrical signals between the components to be connected. Examples of the "element having a certain electrical effect" include not only electrodes and wirings, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having one or more functions.

[0105] In this specification, "parallel" means a state where the angle formed by two straight lines is -10° or more and 10° or less, and thus, it can include a state where the angle is -5° or more and 5° or less. Additionally, "perpendicular" means a state where the angle formed by two straight lines is 80° or more and 100° or less, and thus, it can include a state where the angle is 85° or more and 95° or less.

[0106] In this specification, "film" and "layer" can be interchanged. For example, sometimes "conductive layer" can be changed to "conductive film". Similarly, sometimes "insulating film" can be changed to "insulating layer".

[0107] Triangles, rectangles, trapezoids, pentagons, hexagons, etc. in this specification are not strictly defined and can be approximate triangles, rectangles, trapezoids, pentagons, hexagons, etc. There can be some small deformations due to tolerances, chamfers, arc edges, and deformations, etc.

[0108] "About" in this disclosure means not strictly limiting the boundary and allowing values within the process and measurement error range.

[0109] The "thickness" in this disclosure is the dimension of the film layer in the direction perpendicular to the substrate.

[0110] One criterion for measuring a curved display panel is curvature, which can represent the degree of curvature of the curved display panel. For a curved display panel with a determined size, the smaller the curvature, the larger the arc of the display panel and the smaller the degree of curvature. The reciprocal of the radius of curvature is the curvature. The larger the radius of curvature, the smaller the degree of curvature of the display panel, and the smaller the radius of curvature, the larger the degree of curvature of the display panel. Due to differences in the usage environments of different types of products, there are different requirements for size and curvature. Common radii of curvature are 2000 mm, 3000 mm, etc., and there is a trend towards smaller radii of curvature (such as 1500 mm, 750 mm) to adapt to different application scenarios or usage environments.

[0111] For a thin-film transistor liquid crystal display panel, it generally includes a color filter substrate, an array substrate, and a liquid crystal layer located between the color filter substrate and the array substrate, etc. The curved surface is generally achieved by cold bending or hot bending to form different curvature bending shapes. Affected by the Young's modulus and Poisson's ratio of the material, the internal structure will change during bending, and the color filter substrate and the array substrate are prone to misalignment and offset, and it is easy to produce problems such as color crosstalk and poor image quality. In addition, due to the influence of the photoelastic characteristics of the substrate after being subjected to bending external forces, a phase difference is generated. Coupled with the anisotropy of the liquid crystal, macroscopically, light leakage will occur under the dark state picture effect. As the curvature radius of the bend decreases, the stress increases and the light leakage becomes more obvious.

[0112] An embodiment of the present disclosure provides a display panel, as Figures 1b to 1c shown, which may include a first substrate 11 and a second substrate 12 arranged opposite to each other, and the first substrate 11 and the second substrate 12 are curved surface structures;

[0113] The first substrate 11 may include a first base 1101, and a black matrix layer 111 provided on one side of the first base 1101 close to the second substrate 12;

[0114] The second substrate 12 may include a second base 1201, and a plurality of first signal lines 121 provided on one side of the second base 1201 close to the first substrate 11. The plurality of first signal lines 121 extend along the second direction Y and are arranged along the fourth direction W. In the curved surface where the second substrate 12 is located, the fourth direction W intersects the second direction Y;

[0115] The black matrix layer 111 may include a plurality of first body structures a1 corresponding to the plurality of signal lines 121. A first compensation structure b1 is provided on one side of at least one first body structure a1. In the curved surface where the first substrate 11 is located, the first body structure a1 and the first compensation structure b1 extend along the second direction Y and extend along the fourth direction. In the curved surface where the first substrate 11 is located, the fourth direction intersects the second direction;

[0116] The orthographic projection of any one of the first signal lines 121 on the second substrate 12 is located within the orthographic projection range of the corresponding first body structure a1 and the first compensation structure b1 on the second substrate 12.

[0117] For the display panel provided by the embodiment of the present disclosure, by providing a first compensation structure on one side of at least one first body structure in the black matrix layer, the orthographic projection of the first signal line on the second substrate is located within the orthographic projection range of the corresponding first body structure and the first compensation structure on the second substrate, which largely avoids the phenomena of color crosstalk in the curved surface display panel and light leakage under the dark state picture effect of the display panel.

[0118] In an exemplary embodiment, within the curved surface where the second substrate 12 is located (or within the curved surface where the first substrate 11 is located, or within the curved surface where the display panel is located), the fourth direction W is perpendicular to the second direction Y, that is, the fourth direction W is the direction in which the curvature of the curved surface where the display panel is located extends.

[0119] In an exemplary embodiment, as Figure 1b shown, the display panel is bent toward the side of the second substrate 12 away from the first substrate 11. In the fourth direction W, among any set of the first body structure a1 and the first compensation structure b1, the first compensation structure b1 is located between the first body structure a1 and the first median line; wherein, the first median line is the median line (Q-Q) along which the display panel extends in the second direction Y. In Figure 1b the structure shown, the center of curvature of the curved surface where the display panel is located is on the side of the first substrate 11 away from the second substrate 12.

[0120] In an exemplary embodiment, as Figure 1a and Figure 1d shown, respectively, are Figure 1b the schematic cross-sectional structure diagram and the schematic plan structure diagram of the display panel in the unbent state. The orthographic projection of the first signal line 121 on the second substrate 12 is within the orthographic projection range of the corresponding first body structure a1 on the second substrate 12, and the orthographic projection of the median line along which the first body structure a1 extends in the second direction Y on the second substrate 12 overlaps with the orthographic projection of the median line along which the first signal line 121 extends in the second direction Y on the second substrate 12. Among any set of the first body structure a1 and the first compensation structure b1, the first compensation structure b1 is located between the first body structure a1 and the first median line Q-Q.

[0121] In an exemplary embodiment, as Figure 1c shown, the display panel is bent toward the side of the first substrate 11 away from the second substrate 12. In the fourth direction, among any set of the first body structure a1 and the first compensation structure b1, the first body structure a1 is located between the first compensation structure b1 and the first median line; wherein, the first median line is the median line (Q-Q) along which the display panel extends in the second direction Y. In Figure 1c the structure shown, the center of curvature of the curved surface where the display panel is located is on the side of the second substrate 12 away from the first substrate 11.

[0122] In an exemplary embodiment, as Figure 1e and Figure 1f shown, respectively, are Figure 1cSchematic plan view and schematic cross-sectional view of the display panel in an unbent state. The orthographic projection of the first signal line 121 on the second substrate 12 is within the orthographic projection range of the corresponding first body structure a1 on the second substrate 12, and the orthographic projection of the center line of the first body structure a1 extending along the second direction Y on the second substrate 12 overlaps with the orthographic projection of the center line of the corresponding first signal line 121 extending along the second direction Y on the second substrate 12. In the fourth direction W, in any set of the first body structure a1 and the first compensation structure b1, the first body structure a1 is located between the first compensation structure b1 and the first center line, as Figure 1e shown; wherein, the first center line is the center line (Q-Q) of the display panel along the second direction Y.

[0123] In the embodiments of the present disclosure, the first signal line 121 may be a data signal line, the first substrate 11 may be a color filter substrate, and the second substrate 12 may be an array substrate.

[0124] In an exemplary embodiment, within the curved surface of the display panel, the dimension of the first compensation structure b1 along the fourth direction W may be set according to at least one of the dimensions of the first substrate 1101 and the second substrate 1201 along the bending direction, the dimensions of the first substrate 11 and the second substrate 12 along the second direction Y, the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W, and the radius of curvature R of the display panel. The radius of curvature R of the display panel is the radius of curvature of the curved surface where the display panel is located.

[0125] In the embodiments of the present disclosure, understanding the dimensions of the first substrate 1101 and the second substrate 1201 along the bending direction may be the thicknesses of the first substrate 1101 and the second substrate 1201. Understanding the dimensions of the first substrate 11 and the second substrate 12 along the second direction Y may be the widths of the first substrate 11 and the second substrate 12 or the width of the display panel. Understanding the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W may be the lengths of the first substrate 11 and the second substrate 12 or the length of the display panel.

[0126] In an exemplary embodiment, within the curved surface of the display panel, the dimension of the first compensation structure b1 along the fourth direction W is proportional to the dimensions of the first substrate 1101 and the second substrate 1201 in the bending direction.

[0127] In an exemplary embodiment, when the dimensions of the first substrate 11 and the second substrate 13 along the second direction Y, the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W, and the radius of curvature of the display panel remain unchanged, the dimension of the first compensation structure b1 along the fourth direction W has a linear relationship with the sum of the dimensions of the first substrate 1101 and the second substrate 1201 along the bending direction. As Figure 3a shown, the dimension of the first compensation structure b1 in the fourth direction W may beFigure 3a The maximum misalignment amount of the vertical coordinate, and there is a linear relationship between the dimension of the first compensation structure b1 in the fourth direction W and the dimensions of the first substrate 1101 and the second substrate 1201 in the bending direction. Figure 3a In this case, the substrate thickness of the horizontal coordinate can be the sum of the dimensions (i.e., thicknesses) of the first substrate 1101 and the second substrate 1201 in the bending direction.

[0128] In an exemplary embodiment, in a display panel with a size of 14.6 inches and a curvature radius of 780 millimeters, the relationship between the dimension of the first compensation structure b1 in the fourth direction W and the dimensions of the first substrate 11 and the second substrate 12 in the bending direction can be expressed by the following formula:

[0129] y = 30.314x - 0.1673;

[0130] Where x is the sum of the dimensions of the first substrate 1101 and the second substrate 1201 in the bending direction, and y is the dimension of the first compensation structure b1 along the fourth direction W; x is greater than or equal to 0.3 micrometers and less than or equal to 1 micrometer; y is greater than or equal to 8 micrometers and less than or equal to 30 micrometers.

[0131] In an exemplary embodiment, within the curved surface where the display panel is located, the dimension of the first compensation structure b1 in the fourth direction W is proportional to the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W.

[0132] In an exemplary embodiment, within the curved surface where the display panel is located, when the dimensions of the first substrate 1101 and the second substrate 1201 in the bending direction, the aspect ratio of the display panel, and the curvature radius of the display panel all remain unchanged, the dimension of the first compensation structure b1 along the fourth direction W has a linear relationship with the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W; the aspect ratio is the ratio of the dimension of the display panel along the second direction Y to the dimension of the display panel along the fourth direction W. As Figure 3c shown, the dimension of the first compensation structure b1 in the fourth direction W can be Figure 3c the maximum misalignment amount of the vertical coordinate, and the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W can be Figure 3c the substrate length of the horizontal coordinate in this case, and the dimension of the first compensation structure b1 in the fourth direction W and the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W can have a linear relationship.

[0133] In an exemplary embodiment, in a display panel where the dimensions of the first substrate 1101 and the second substrate 1201 in the bending direction are both 0.2 micrometers, the radius of curvature is 780 millimeters, and the aspect ratio of the display panel is 55%, the relationship between the dimension of the first compensation structure b1 in the fourth direction W and the dimensions of the first substrate 11 and the second substrate 12 in the fourth direction W can be expressed by the following formula:

[0134] y = 0.0364x + 0.0131;

[0135] where x is the dimension of the first substrate 11 and the second substrate 12 in the fourth direction W, and y is the dimension of the first compensation structure b1 in the fourth direction W; x is greater than or equal to 250 millimeters and less than or equal to 550 millimeters; y is greater than or equal to 8 micrometers and less than or equal to 20 micrometers.

[0136] In an exemplary embodiment, in a display panel where the dimensions of the first substrate 1101 and the second substrate 1102 in the bending direction are both 0.2 millimeters, the radius of curvature is 780 millimeters, and the aspect ratio of the display panel is 37%, the relationship between the dimension of the first compensation structure b1 in the fourth direction W and the dimensions of the first substrate 11 and the second substrate 12 in the fourth direction W can be expressed by the following formula:

[0137] y = 0.0231x - 0.1021;

[0138] where x is the dimension of the first substrate 11 and the second substrate 12 in the fourth direction W, and y is the dimension of the first compensation structure b1 in the fourth direction W; x is greater than or equal to 250 millimeters and less than or equal to 550 millimeters; y is greater than or equal to 5 micrometers and less than or equal to 15 micrometers.

[0139] In an exemplary embodiment, in a display panel where the aspect ratio is greater than or equal to 10% and less than or equal to 60%, when the radius of curvature of the display panel, the dimensions of the first substrate 1101 and the second substrate 1201 in the bending direction, and the dimensions of the first substrate 11 and the second substrate 12 in the fourth direction W remain unchanged, the dimension of the first compensation structure b1 in the fourth direction W is proportional to the aspect ratio; as Figure 3d shown, the dimension of the first compensation structure b1 in the fourth direction W can be Figure 3d the maximum misalignment amount of the ordinate in

[0140] In an exemplary embodiment, as Figure 3dAs shown, in a display panel with a radius of curvature of 780 mm, the dimensions of the first substrate 1101 and the second substrate 1201 along the bending direction are both 0.15 mm, and the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W are 327.7 mm, the relationship between the dimension of the first compensation structure b1 in the fourth direction W and the aspect ratio can be expressed by the following formula:

[0141] y = 19.536x - 1.823;

[0142] where x is the aspect ratio of the display panel, and y is the dimension of the first compensation structure b1 in the fourth direction W; the value range of x is greater than or equal to 10% and less than or equal to 60%; y is greater than or equal to 0.9 μm and less than or equal to 9 μm.

[0143] In an exemplary embodiment, the dimension of the first compensation structure b1 in the fourth direction W can be proportional to the displacement of the display panel along the bending direction;

[0144] The displacement of the display panel along the bending direction is the vertical distance between the midline position of the curved display panel extending along the second direction Y and the midpoint position of the line connecting the two ends of the curved display panel. As Figure 2b shown, M is the displacement of the display panel along the bending direction.

[0145] In an exemplary embodiment, when the dimensions of the first substrate 11 and the second substrate 12 along the second direction Y, the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W, and the dimensions of the first substrate 1101 and the second substrate 1201 along the bending direction remain unchanged, the dimension of the first compensation structure b1 in the fourth direction W and the displacement of the display panel along the bending direction are linearly related. As Figure 3b shown, the dimension of the first compensation structure b1 in the fourth direction W can be Figure 3b the maximum misalignment amount of the ordinate in. In an exemplary embodiment, within the range of the radius of curvature from 780 mm to 2000 mm, when the dimensions of the first substrate 11 and the second substrate 12 along the second direction Y, the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W, and the dimensions of the first substrate 1101 and the second substrate 1201 along the bending direction remain unchanged, the dimension of the first compensation structure b1 in the fourth direction W and the displacement of the display panel along the bending direction are linearly related.

[0146] In an exemplary embodiment, as Figure 3b shown, in a display panel with a size of 12.3 inches and the dimensions of the first substrate 1101 and the second substrate 1102 along the bending direction both being 0.2 mm, the dimension of the first compensation structure b1 in the fourth direction W and the displacement of the display panel along the bending direction are expressed by the following formula:

[0147] y = 0.5221x - 0.017;

[0148] Wherein, x is the displacement of the display panel along the bending direction, and y is the dimension of the first compensation structure b1 along the fourth direction W; the value range of x is greater than or equal to 2 mm and less than or equal to 14 mm; y is greater than or equal to 1 μm and less than or equal to 8 μm.

[0149] In an exemplary embodiment, the displacement of the display panel along the bending direction and the radius of curvature of the display panel have the following relationship:

[0150] M = R – R*cos((L / 2) / R);

[0151] As Figure 2b shown, L is the dimension of the display panel along the fourth direction W, R is the radius of curvature of the surface where the display panel is located, and M is the displacement in the bending direction of the display panel. In an exemplary embodiment, the radius of curvature R can be 780 mm to 5000 mm, and the displacement M in the bending direction of the display panel can be 2 mm to 14 mm.

[0152] In an exemplary embodiment, as Figure 8 shown, the black matrix layer 111 may further include a second compensation structure b2, and the second compensation structure b2 and the first compensation structure b1 are symmetrically arranged with respect to the midline extending along the second direction Y of the first body structure a1. In the embodiments of the present disclosure, the first compensation structure b1 and the second compensation structure b2 are symmetrically arranged on both sides of the first body structure a1, and the compensation method is simple, which can simplify the process.

[0153] In an exemplary embodiment, as shown in FIG. 1, the first substrate 11 further includes a plurality of color resist elements 112 disposed on the side of the first substrate 1101 close to the second substrate 12. In the surface where the first substrate 11 is located, the plurality of color resist elements 112 and the first body structure a1 and the first compensation structure b1 are alternately arranged in the fourth direction W and extend along the second direction Y.

[0154] In an exemplary embodiment, as Figure 6a , Figure 6c and Figure 10a shown, the first substrate 11 is further provided with a first alignment layer 113 and a plurality of support structures 103. The black matrix layer 111 and the plurality of color resist elements 112 are located between the first alignment layer 113 and the first substrate 1101, and the support structures 103 are disposed on the side of the first alignment layer 113 close to the second substrate 12;

[0155] The black matrix layer may further include a plurality of third body structures a3 corresponding to the plurality of support structures 103. At least one third body structure a3 is provided with a third compensation structure b3. In the curved surface where the first substrate 11 is located, in the fourth direction W, the third compensation structure b3 is located on one side of the third body structure a3.

[0156] The orthographic projection of the support structure 103 on the second substrate 12 is within the range of the orthographic projections of the third body structure a3 and the third compensation structure b3 on the second substrate 12; there is an overlapping area between the third body structure a3 and the first body structure a1; the dimensions of the third body structure a3 and the third compensation structure b3 in the fourth direction W are greater than the dimensions of the first body structure a1 and the first compensation structure b1 in the fourth direction W.

[0157] In an exemplary embodiment, in the curved surface where the display panel is located, the dimension of the third compensation structure a3 in the fourth direction W is set in the same manner as the dimension of the first compensation structure a1 in the fourth direction W. That is, the dimension of the third compensation structure b3 in the fourth direction W is set according to at least one of the dimensions of the first substrate 1101 and the second substrate 1201 in the bending direction of the display panel, the dimensions of the first substrate 11 and the second substrate 12 in the second direction Y, the dimensions of the first substrate 11 and the second substrate 12 in the fourth direction W, and the radius of curvature of the display panel. The radius of curvature of the display panel is the radius of curvature of the curved surface where the display panel is located.

[0158] In an exemplary embodiment, as Figure 6a 、 Figure 6c and Figure 10a shown, the display panel is bent toward the side of the second substrate 12 away from the first substrate 11. In the fourth direction W, in any set of the third body structure a3 and the third compensation structure b3, the third compensation structure b3 is located between the third body structure a3 and the first median line, where the first median line is the median line extending along the second direction Y in the curved surface where the display panel is located.

[0159] In an exemplary embodiment, as Figure 7a 、 Figure 7c and Figure 10b shown, the display panel is bent toward the side of the first substrate 11 away from the second substrate 12. In the fourth direction W, in any set of the third body structure a3 and the third compensation structure b3, the third body structure a3 is located between the third compensation structure b3 and the first median line, where the first median line is the median line extending along the second direction Y in the curved surface where the display panel is located.

[0160] In an embodiment of the present disclosure, by providing a third compensation structure b3 on one side of the third body a1, in a state where the display panel is bent, the support structure 103 on the display panel can be blocked by the corresponding third body structure a3 and the third compensation structure b3, thereby avoiding light leakage or color crosstalk phenomena caused by misalignment of the first substrate 11 and the second substrate 12 due to bending of the display panel.

[0161] In an exemplary embodiment, as Figure 10a and Figure 10b shown, on a side of the second substrate 1201 close to the first substrate 11, a plurality of second signal lines 122 and vias 123 are further provided. The second signal lines 122 extend in a fourth direction W within the curved surface where the second substrate 12 is located and are arranged along a second direction Y;

[0162] The black matrix layer 111 may further include a plurality of second body structures a2 corresponding to the plurality of second signal lines 122. The plurality of second body structures a2 extend in the fourth direction W within the curved surface where the first substrate 11 is located, are arranged along the second direction Y, and are arranged along the fourth direction W;

[0163] Orthogonal projections of the plurality of second signal lines 122 and the vias 123 on the second substrate 12 are within the range of the orthogonal projections of the corresponding second body structures a2 on the second substrate 12;

[0164] There are overlapping regions among the first body structure a1, the second body structure a2, and the third body structure a3.

[0165] In an exemplary embodiment, as shown in FIG. 9, the black matrix layer 111 may further include a fourth compensation structure b4, and the fourth compensation structure b4 is symmetrically arranged with respect to the third compensation structure b3 about the midline extending in the second direction Y with respect to the third body structure a3.

[0166] In an exemplary embodiment, as shown in FIG. 9, the black matrix layer 111 may further include a fifth compensation structure b5 and a sixth compensation structure b6, and the fifth compensation structure b5 and the sixth compensation structure b6 are symmetrically arranged with respect to the midline of the third body structure a3 extending in the fourth direction W. In the structure shown in FIG. 9, the third compensation structure b3 to the sixth compensation structure b6 may be provided on the third body structure a3, so that the support structure 103 can be completely blocked by the third body structure a3 and the third compensation structure b3 to the sixth compensation structure b6. When the support structure 103 scratches the alignment layer on the first substrate 11 or the second substrate 12, the liquid crystal layer between the first substrate 11 and the second substrate 12 usually exhibits alignment anomalies in the scratched area of the alignment layer, resulting in display anomalies. The third body structure a3 on the black matrix layer and the third compensation structure b3 to the sixth compensation structure b6 provided around the third body structure a3 can block the area where the display anomaly is caused by the support structure 103 scratching the alignment layer, thereby minimizing the problem of display anomalies caused by the support structure 103 scratching the alignment layer on the display panel.

[0167] In the structure shown in FIG. 9, St2 is the dimension of the third compensation structure b3 and the fourth compensation structure b4 in the fourth direction, and St3 is the dimension of the fifth compensation structure b5 and the sixth compensation structure b6 in the second direction Y.

[0168] In an exemplary embodiment of the present disclosure, a plurality of first black matrix structures 1111, a plurality of second black matrix structures 1112, and a plurality of third black matrix structures 1113 may be provided on the black matrix layer 111; any one of the first black matrix structures 1111 may be composed of the first body structure a1 and the first compensation structure b1 provided on one side of the first body structure; or any one of the first black matrix structures 1111 may be composed of the first body structure a1, the first compensation structure b1, and the second compensation structure b2; any one of the second black matrix structures 1112 may be composed of the second body structure a2; and any one of the third black matrix structures 1113 may be composed of the third body structure a3 and the third compensation structure b3 to the sixth compensation structure b6 provided around the third body structure.

[0169] In an exemplary embodiment, the plurality of first black matrix structures 1111, the plurality of second black matrix structures 1112, and the plurality of third black matrix structures 1113 may be an integrally formed structure.

[0170] In an exemplary embodiment, as Figure 1c , Figure 11 , Figure 12As shown, the display panel includes a first side D1 and a second side D2 that are oppositely arranged along a fourth direction W. On the surface where the display panel is located, between the first median line Q-Q and the first side D1, the size of the first compensation structure b1 gradually decreases along the fourth direction W from the first compensation structure b1 near the third median line P-P to the first compensation structure b1 far from the third median line P-P; between the first median line Q-Q and the second side D2, the size of the first compensation structure b1 gradually decreases along the fourth direction W from the first compensation structure b1 near the fourth median line O-O to the first compensation structure b1 far from the fourth median line O-O.

[0171] The third median line P-P is the median line of the display panel extending along the second direction located between the first median line Q-Q and the first side D1, and the fourth median line O-O is the median line of the display panel extending along the second direction Y located between the first median line Q-Q and the second side D2.

[0172] As Figure 6b shown, in the case where the first compensation structure b1 is not provided in the first body structure a1, in the display panel area between the first median line Q-Q and the first side D1, the size of the misalignment amount Shift gradually decreases along the fourth direction from the misalignment amount Shift near the third median line P-P to the misalignment amount Shift far from the third median line P-P. For example, both the misalignment amount Shift2 and the misalignment amount Shift1 are located between the third median line P-P and the first median line Q-Q, and the size of the misalignment amount Shift2 along the fourth direction W is greater than the size of the misalignment amount Shift1 along the fourth direction W (in the fourth direction W, the misalignment amount Shift2 is located between the third median line P-P and the misalignment amount Shift1); correspondingly, in the display panel area between the first median line Q-Q and the first side D1, the size of the first compensation structure b1 gradually decreases along the fourth direction from the first compensation structure b1 near the third median line P-P to the first compensation structure b1 far from the third median line P-P. For example, as Figure 6c shown, the compensation amount St12 of the first compensation structure b1 is greater than the compensation amount St11 of the first compensation structure b1 along the fourth direction W (the compensation amount St12 is located between the third median line P-P and the compensation amount St11).

[0173] In an exemplary embodiment, within the surface where the display panel is located, the display panel can be divided into multiple regions along the fourth direction W. The multiple regions include a first region H1 and two k-th regions Hk, where 2 ≤ k ≤ N, and N is a positive integer greater than or equal to 2. For any value of k, the two regions Hk are symmetrically arranged along the fourth direction W with respect to the first median line; the sizes of the multiple first compensation structures b1 located in the first region H1 are the same along the fourth direction W, and the sizes of the multiple first compensation structures 1 located in the region Hk corresponding to the same value of k are the same along the fourth direction W. In an exemplary embodiment, as Figure 11As shown, N = 3. The multiple regions include a first region H1, two second regions H2, and two third regions H3. The first region H1 is symmetrically arranged with respect to the first median line Q-Q along the fourth direction W. The two second regions H2 are symmetrically arranged with respect to the first median line Q-Q along the fourth direction W. The two third regions H3 are symmetrically arranged with respect to the first median line Q-Q along the fourth direction W. In an exemplary embodiment, for the display panel located between the first median line Q-Q and the first side D1, the first region H1 and the third region H3 are symmetrically arranged with respect to the third median line P-P along the fourth direction W, and the second region H2 is symmetrically arranged with respect to the third median line P-P along the fourth direction W. For the display panel located between the first median line Q-Q and the second side D2, the first region H1 and the third region H3 are symmetrically arranged with respect to the fourth median line O-O along the fourth direction W, and the second region H2 is symmetrically arranged with respect to the fourth median line O-O along the fourth direction W.

[0174] In an exemplary embodiment, in Figure 11 the divided regions as shown, on the display panel of the first median line Q-Q close to the first side D1, on the same side of the third median line P-P, the size of the first compensation structure b1 gradually decreases along the fourth direction W from the first compensation structure b1 in the region close to the third median line P-P to the first compensation structure b1 in the region far from the third median line P-P. On the display panel of the first median line Q-Q close to the second side D2, on the same side of the fourth median line O-O, the size of the first compensation structure b1 gradually decreases along the fourth direction W from the first compensation structure b1 in the region close to the fourth median line O-O to the first compensation structure b1 in the region far from the fourth median line O-O.

[0175] In an exemplary embodiment, in Figure 11 the divided regions as shown, on the display panel of the first median line Q-Q close to the first side D1, on the same side of the third median line P-P, the size of the third compensation structure b3 gradually decreases along the fourth direction W from the third compensation structure b3 in the region close to the third median line P-P to the third compensation structure b3 in the region far from the third median line P-P. On the display panel of the first median line Q-Q close to the second side D2, on the same side of the fourth median line O-O, the size of the third compensation structure b3 gradually decreases along the fourth direction W from the third compensation structure b3 in the region close to the fourth median line O-O to the third compensation structure b3 in the region far from the fourth median line O-O.

[0176] In an exemplary embodiment, within the curved surface where the display panel is located, on each side of the first median line Q-Q, it is divided into N-2 concentric annular regions. The region at the inner center position of the annular region is the first region T1, and the region at the outer periphery of the annular region is the Nth region Tn. Any Jth region TJ on the display panel includes two, where J ranges from 1 to N. The two Jth regions TJ are located on both sides of the first median line Q-Q and are symmetric with respect to the first median line in the fourth direction W. Any Jth region TJ is symmetrically arranged with respect to the second median line, and the second median line is the median line of the display panel extending in the fourth direction W. The dimensions of the multiple first compensation structures b1 located at the first region T1 along the fourth direction W are the same, and the dimensions of the multiple first compensation structures b1 located in the region corresponding to the same J value in the region TJ are the same. In an exemplary embodiment, as Figure 12 shown, N = 3. The multiple regions include two first regions T1, two second regions T2, and two third regions T3. The second region is the T2 annular region. The first region T1 is located at the center position of the annular region of the second region T2, and the third region T3 is located at the outer peripheral region of the annular region of the second region T2.

[0177] In an exemplary embodiment, on the curved surface where the display panel is located, on the same side of the first median line Q-Q, the dimensions of the first compensation structures b1 gradually decrease along the fourth direction W from the first compensation structures b1 in the region closer to the center position of the annular region to the first compensation structures b1 in the region farther from the center position of the annular region.

[0178] In an exemplary embodiment, on the display panel on the side of the first median line Q-Q closer to the first side D1, the dimensions of the third compensation structures b3 gradually decrease along the fourth direction W from the third compensation structures b3 in the region closer to the third median line P-P to the third compensation structures b3 in the region farther from the third median line P-P; on the display panel on the side of the first median line Q-Q closer to the second side D2, the dimensions of the third compensation structures b3 gradually decrease along the fourth direction W from the third compensation structures b3 in the region closer to the fourth median line O-O to the third compensation structures b3 in the region farther from the fourth median line O-O.

[0179] In an exemplary embodiment, on the curved surface where the display panel is located, on the same side of the first median line, the dimensions of the third compensation structures b3 and the fourth compensation structures b4 gradually decrease along the fourth direction W from the third compensation structures b3 and the fourth compensation structures b4 in the region closer to the center position of the annular region to the third compensation structures b3 and the fourth compensation structures b4 in the region farther from the center position of the annular region.

[0180] In the embodiments of the present disclosure, the first compensation structure b1 to the fourth compensation structure b4 may be arranged in the same manner in terms of the dimension along the fourth direction W. For example, b1 to b4 are all arranged according to at least one of the dimensions of the first substrate 1101 and the second substrate 1201 along the bending direction, the dimensions of the first substrate 11 and the second substrate 12 along the second direction Y, the dimensions of the first substrate 11 and the second substrate 12 along the fourth direction W, and the radius of curvature of the display panel.

[0181] In an exemplary embodiment, on the curved surface where the display panel is located, on the same side of the first median line Q-Q, the dimension of the second compensation structure b2 from the region close to the center position of the annular region to the region far from the center position of the annular region along the fourth direction W gradually decreases.

[0182] In the embodiments of the present disclosure, by providing the compensation structure on the first body structure a1, the second body structure a2, and the third body structure a3, it is possible to avoid the phenomena of light leakage and color crosstalk caused by the misalignment of the first substrate 11 and the second substrate 12 after the display panel is bent. At the same time, when the display panel is in the dark state, the degree of light leakage of the display panel can be reduced to a certain extent.

[0183] In the embodiments of the present disclosure, in the curved display panel, the orthographic projection of the center line position of the first black matrix structure 1111 (including the first body structure a1 and the first compensation structure b1) along the second direction Y on the first substrate 11 may overlap with the orthographic projection of the first signal line 121 on the first substrate 11. The orthographic projection of the center position of the third black matrix structure 1113 (including the third body structure a3 and the third compensation structure) on the first substrate 11 may overlap with the orthographic projection of the center line position of the support structure 103 on the first substrate.

[0184] Before the display panel is bent, the orthographic projection of the support structure 103 on the first substrate 11 may be located in the central region of the orthographic projection of the third body structure a3 on the first substrate 11.

[0185] In the embodiments of the present disclosure, before manufacturing the curved display panel, a curved surface simulation model of the display panel may be established through simulation software (such as Ansysworkbench software) to simulate the misalignment amount between the first body structure a1 on the first substrate 11 and the data signal line 121 on the second substrate 12. The first body structure a1 is compensated according to the simulated misalignment amount. In the embodiments of the present disclosure, the misalignment amount of the actual product may be measured by actually manufacturing the curved display panel. As Figure 2aAs shown, the display panel with a curved surface structure can simulate the distribution of the misalignment amount through a curved surface model. The curved surface simulation model can simply simulate the color filter substrate 11, the array substrate 12, the sealant 101 in the display panel, and the fixed axis H for determining the bending center position of the display panel. The radius of curvature R of the display panel is calculated by loading the displacement amount in the third direction Z. As Figure 2b shown, the relationship between the displacement amount M in the third direction Z and the radius of curvature R can be expressed by the following formula:

[0186] M = R – R * cos((L / 2) / R);

[0187] wherein, L is the length of the display panel along the fourth direction W, R is the radius of curvature, M is the displacement amount in the third direction Z, and the value of the angle F is (L / 2) / R.

[0188] In the embodiment of the present disclosure, the displacement amount M loaded in the third direction Z can be the distance between the center position of the curved surface display panel and the midpoint position of the connection line between both ends of the curved surface display panel.

[0189] In the embodiment of the present disclosure, after the display panel is bent (in Figure 2b it is bent in the opposite direction of the third direction Z), a displacement amount M is generated in the bending direction, and a misalignment will occur between the color filter substrate 11 and the array substrate 12 in the display panel. The misalignment amount shift = the position of the color filter substrate - the position of the array substrate. As Figure 2c and Figure 2d shown, they are the distribution diagrams of the misalignment amounts generated between the color filter substrate 11 and the array substrate 12 observed from different perspectives. At different positions in the display panel, the magnitudes of the misalignment amount shift are different. Among them, the depth of the color c1 only represents different offset amounts or misalignment amounts on the left side of the midline extending along the second direction Y of the display panel (i.e., the misalignment amount generated between the upper and lower substrates in the area of the display panel between the first midline Q-Q and the first side D1), and the depth of the color c2 only represents different offset amounts or misalignment amounts on the right side of the midline extending along the second direction Y of the display panel (i.e., the misalignment amount generated between the upper and lower substrates in the area of the display panel between the first midline Q-Q and the second side D2). In Figure 2c and Figure 2d 110 represents the misalignment amount distribution on the left side of the midline along the second direction Y of the display panel (i.e., the misalignment amount distribution between the upper and lower substrates in the area of the display panel between the first midline Q-Q and the first side D1), and 120 represents the misalignment amount distribution on the right side of the midline along the second direction Y of the display panel (i.e., the misalignment amount distribution between the upper and lower substrates in the area of the display panel between the first midline Q-Q and the second side D2). The simulated misalignment amount can be close to or the same as the size of the first compensation structure b1 along the fourth direction W.

[0190] In an embodiment of the present disclosure, during the bending process of the display panel, stress birefringence of the color filter substrate 11 and the array substrate 12 generates a phase difference. Additionally, due to the influence of the liquid crystal anisotropy characteristics, light leakage often occurs. The light leakage can be evaluated by the transmittance in the dark state and can be obtained through the following formula:

[0191]

[0192] Where τ xy represents the shear force inside the color filter substrate 11 and the array substrate 12 under the action of an external force, t represents the thickness of the color filter substrate 11 and the array substrate 12 (which can be the dimension of the first substrate 11 and the second substrate 12 along the bending direction), SOC represents the photoelastic coefficient of the color filter substrate 11 and the array substrate 12, T represents the degree of light leakage of the display panel, and the degree of light leakage T is positively correlated with the square of the thickness of the substrate and the square of the shear force τ xy .

[0193] In an exemplary embodiment, the degree of light leakage T can be evaluated by the square distribution of the shear force τ xy , and the degree of light leakage T is positively correlated with the square distribution of the shear force τ xy , as shown in Figure 2e .

[0194] In an embodiment of the present disclosure, in the simulation model, the color filter substrate 11 can be referred to as the upper substrate, and the array substrate 12 can be referred to as the lower substrate; wherein, the substrates in the upper and lower substrates can be referred to as glass. In the simulated model, the upper substrate can be simplified into a model with only the first substrate 1101, and the lower substrate can be simplified into a model with only the second substrate 1201.

[0195] The following will combine with Figures 2a to 2d to detail the simulation results of the misalignment amount shift of the upper and lower substrates after the curved display panel is bent:

[0196] (1) Since the periphery of the display panel is fixed by the sealant 101, the misalignment amount shift of the upper and lower substrates is divided into the left and right sides of the fixed axis H (the bending center position, which can also be the position of the first center line Q-Q) in the first direction X, and offsets to both sides of the fixed axis H, that is, offsets in the opposite direction of the first direction X from the fixed axis H and offsets in the first direction X from the fixed axis H, as shown in Figure 2a and Figure 2c . The dimension of the misalignment amount after bending can be the dimension of the first compensation structure b1 along the fourth direction W.

[0197] (2) There is a first central axis (i.e., the above-mentioned third median line P-P) between the fixed shaft H and the first side D1, and a second central axis (i.e., the above-mentioned fourth median line O-O) between the fixed shaft H and the second side D2. Due to the fixing effect of the peripheral sealing adhesive 101 of the display panel, the misalignment shift of the upper and lower substrates gradually decreases in the fourth direction W from the position close to the first central axis to the position close to the sealing adhesive 101 and the fixed shaft H; the misalignment shift of the upper and lower substrates gradually decreases in the fourth direction W from the position close to the second central axis to the position close to the sealing adhesive 101 and the fixed shaft H. That is, the misalignment shift is non-uniformly distributed on the display panel. The misalignment shift distribution structure observed in the XY plane in Figure 2 is actually the orthographic projection of the misalignment shift along the fourth direction W on the plane where the first direction X and the second direction Y are located.

[0198] (3) The maximum misalignment shift usually appears at the positions of the first central axis and the second central axis, and the misalignment shift is slightly different due to the difference in the size ratio of the display panel. As Figure 2f and Figure 2g show, there are certain differences in the misalignment shift of display panels with different aspect ratios. Figure 2f The figure shows the misalignment shift distribution diagram of the upper and lower substrates of a simulated display panel with an aspect ratio of 16:9. Figure 2g The figure shows the misalignment shift distribution diagram of the upper and lower substrates of a simulated display panel with an aspect ratio of 16:6. It can be seen from the simulation results that the misalignment shift of the upper and lower substrates of the display panel with an aspect ratio of 16:9 is greater than that of the display panel with an aspect ratio of 16:6.

[0199] Generally, the misalignment shift of the upper and lower substrates is generally related to the base thickness, curvature radius (which can be called the bending radius), size of the display panel, and aspect ratio of the display panel. The factors related to the misalignment shift can also include the materials of the substrates and the sealing adhesive. The following simulation is based on the maximum misalignment shift of the same materials of glass and sealing adhesive for comparison:

[0200] (1) When the size, aspect ratio, and bending radius of the display panel are the same, the greater the total base thickness of the upper and lower substrates, the greater the maximum misalignment shift. As Figure 3a shows, the maximum shift has a linear relationship with the substrate thickness. In the exemplary embodiment of the present disclosure, Figure 3a in the simulation relationship between the substrate thickness and the maximum misalignment shift, the size of the display substrate can be 14.6 inches, and the curvature radius of the display panel can be 780 mm.

[0201] (2) When the size, aspect ratio, and substrate thickness of the display panel are the same (for example, the size of the display panel can be 12.3 inches, and the thickness of the upper and lower substrates can both be 0.2 mm), the smaller the bending radius R (which can be called the curvature radius R), the larger the maximum misalignment shift; as Figure 3b shown, the maximum misalignment shift is proportional to the displacement M along the third direction Z. Figure 3b In it, R5000 represents a curvature radius of 5000 mm, R3000 represents a curvature radius of 3000 mm, R2000 represents a curvature radius of 2000 mm, and R780 represents a curvature radius of 780 mm.

[0202] (3) When the aspect ratio, bending radius (i.e., curvature radius), and substrate thickness of the display panel are the same (for example, the curvature radius of the display panel is 780 mm, and the thickness of the upper and lower substrates is both 0.2 mm), the smaller the size of the display panel along the fourth direction W, the smaller the misalignment shift between the upper and lower substrates, and the maximum misalignment shift has a linear relationship with the size of the display panel along the fourth direction. As Figure 3c shown, for a display panel with a curvature radius of 780 mm, when the substrate length L (the size of the display panel along the fourth direction W) increases from 250 mm to about 550 mm (corresponding to the size of the display panel being about 10 inches to 22 inches), the maximum misalignment shift has a linear relationship with the substrate length. Figure 3c In it, S11 is the relationship between the maximum misalignment shift and the substrate length when the aspect ratio of the simulated display panel is W / L = 55%. The maximum misalignment shift can be calculated by the following approximate formula: y = 0.0364x + 0.0131, where y represents the maximum misalignment shift and x represents the substrate length; S12 is the relationship between the maximum misalignment shift and the substrate length when the aspect ratio of the simulated display panel is W / L = 37%. The maximum misalignment shift can be calculated by the following approximate formula: y = 0.0231x - 0.1021, where y represents the maximum misalignment shift and x represents the substrate length.

[0203] (4) When the bending radius (i.e., curvature radius) and substrate thickness of the display panel are the same (for example, the length of the display panel along the fourth direction W is 327.7 mm, the curvature radius of the display panel is 780 mm, and the thickness of the upper and lower substrates is both 0.15 mm), the smaller the aspect ratio of the display panel, the smaller the misalignment shift between the upper and lower substrates. As Figure 3d shown, when the aspect ratio W / L > 10%, the maximum misalignment shift is basically linearly related to the aspect ratio W / L.

[0204] Based on the above simulation results, it is possible to preliminarily expand the design of the size, bending radius (radius of curvature), and substrate thickness of the display panel for different requirements and different situations, so as to design a display panel that meets different requirements and different application scenarios.

[0205] In the embodiments of the present disclosure, for a display panel applied to an irregular structure scenario, such as a vehicle-mounted curved display, since it has a locally smaller aspect ratio, the misalignment shift of the upper and lower substrates of a general display panel is generally smaller than that of a display panel with a normal shape, and the light leakage degree is small. Taking a 15.6-inch display panel (with a radius of curvature of 780 mm, the thickness of both the upper and lower substrates is 0.15 mm, the width of the display panel is W = 128.2 mm, and the length of the display panel is L = 373.8 mm) as an example, in the case of using a non-irregular display panel, the maximum misalignment shift of the upper and lower substrates is 6.1 microns; while in the case of using an irregular display panel, the maximum misalignment shift of the upper and lower substrates is 4.3 microns. For a conventional vehicle-mounted pixel of 50 microns × 150 microns, when using a black matrix (abbreviated as BM) for unilateral compensation, the estimated opening (which can be called the transmittance) difference is 5%, and when using a black matrix for bilateral compensation, the estimated opening difference is 10%. As Figure 4a shown, it is a schematic diagram of the light leakage distribution of a 15.6-inch non-irregular display panel. Figure 4b shown is a schematic diagram of the light leakage distribution of a 15.6-inch irregular display panel. Figure 4a and Figure 4b shown can be a schematic diagram of light leakage formed under the same stepped gray level. From Figure 4a and Figure 4b it can be seen that for display panels of the same size, the light leakage degree of the display panel with an irregular design is weaker than that of the display panel with a non-irregular design. Therefore, due to the weaker light leakage degree, the display effect of the display panel with an irregular design is better than that of the display panel with a non-irregular design.

[0206] In an exemplary embodiment, for a non-curved liquid crystal display panel, such as Figure 5a and Figure 5bAs shown, the color filter substrate 11 may include a first substrate 1101, a black matrix layer 111 (BM), color resist elements 112, and a first alignment layer 113 covering the black matrix layer 111 and the color resist elements 112 disposed on the first substrate 1101. The color resist elements 112 may include a first color resist element 1121, a second color resist element 1122, and a third color resist element 1123. The black matrix layer 111 may include a first black matrix structure 1111, a second black matrix structure 1112, and a third black matrix structure 1113. The array substrate 12 may include a second substrate 1201, data signal lines 121 (SD), gate signal lines 122 (Gate), vias 123, pixel electrodes 124, and a second alignment layer 125 covering the pixel electrodes 124 disposed on the second substrate 1201. A liquid crystal layer 102 and a support structure 103 (PS) are provided between the color filter substrate 11 and the array substrate 12. The support structure 103 may include a main support structure 1031 (Main PS) and an auxiliary support structure 1032 (Sub PS). In the embodiments of the present disclosure, the main support structure 1031 (Main PS) is disposed on the upper and lower substrates. In the normal state, the main support structure 1031 can contact the lower substrate, playing a role in supporting the upper and lower substrates. The auxiliary support structure 1032 does not contact the lower substrate in the normal state. After pressing the display panel, the auxiliary support structure 1032 can contact the lower substrate, playing an auxiliary supporting role.

[0207] In the embodiments of the present disclosure, the main function of the black matrix layer 111 is for light shielding, and it may be formed by one or more of a light resin, a black resin, and a chromium material.

[0208] In an exemplary embodiment, the first black matrix structure 1111 may be used to divide pixels. The first black matrix structure 1111 and the data signal lines 121 both extend along the second direction Y. The dimension of the first black matrix structure 1111 along the fourth direction W is greater than the dimension of the data signal lines 121 along the fourth direction W. The orthographic projection of the data signal lines 121 on the array substrate 12 falls within the orthographic projection of the first black matrix structure 1111 on the array substrate 12, and the orthographic projection of the first black matrix structure 1111 on the array substrate 12 is symmetric about the midline extending along the second direction Y of the orthographic projection of the data signal lines 121 on the array substrate 12 along the fourth direction W. In the case where the process of manufacturing the display panel fluctuates, it can keep the pixel aperture unchanged and reduce the display defects caused by color crosstalk at large viewing angles. With this design method for the first black matrix structure 1111 and the data signal lines 121, the relationship between the dimension BM_Data of the first black matrix 1111 along the first direction X and the dimension SD CD of the data signal lines 121 along the first direction X can be as follows:

[0209]

[0210] When the upper and lower substrates (i.e., the color filter substrate 11 and the array substrate 12) are aligned and there is a certain fluctuation on one side of the first black matrix structure 1111, it will not affect the function of the black matrix layer 111 to divide pixels and avoid color crosstalk.

[0211] In an exemplary embodiment, the second black matrix structure 1112 is used to block the gate signal line 122 (Gate) and the via 123 on the array substrate 12 (a thin film transistor is also provided on the array substrate 12, and the via is a connection via between the thin film transistor and the pixel electrode 124). Both the second black matrix structure 1112 and the gate signal line 122 extend along the fourth direction W, and the orthographic projections of the gate signal line 122 and the via 123 on the array substrate 12 fall within the orthographic projection range of the second black matrix 1112 on the array substrate 12.

[0212] In an exemplary embodiment, the third black matrix structure 1113 is used to block the support structure 103. The third black matrix structure 1113 may include a first sub-black matrix structure 11131 for blocking the main support structure 1031 (Main PS) and a second sub-black matrix structure 11132 for blocking the auxiliary support structure 1032 (Sub PS). The orthographic projection of the main support structure 1031 on the array substrate 12 falls within the orthographic projection range of the first sub-black matrix structure 11131 on the array substrate 12, and the orthographic projection of the auxiliary support structure 1032 on the array substrate 12 falls within the orthographic projection range of the first sub-black matrix structure 11131 on the array substrate 12. In an exemplary embodiment, the center position of the orthographic projection of the main support structure 1031 on the array substrate 12 coincides with the center position of the orthographic projection of the first sub-black matrix structure 11131 on the array substrate 12, and the center position of the orthographic projection of the auxiliary support structure 1032 on the array substrate 12 coincides with the center position of the orthographic projection of the first sub-black matrix structure 11131 on the array substrate 12. Both the support structure 103 and the third black matrix structure 1113 are symmetric structures with a center line extending along the fourth direction W. The third black matrix structure 1113 has a certain outward expansion compensation relative to the support structure 103 (by providing the third compensation structure b3 to the sixth compensation structure b6 in the third body structure a3), which can enable the first alignment layer 113 (PI) and the second alignment layer 125 to be normally aligned, and can avoid the light leakage defect caused by the second alignment layer 125 on one side of the array substrate 12 being scratched by the support structure 103 after an external force.

[0213] The following compensations are made for the black matrix structures in the black matrix 111 of the curved display panel. The following several compensation methods are proposed from the compensation position and the compensation size (i.e., the size of the compensation structure along the fourth direction in the display panel), as shown in Table 1:

[0214] Table 1 Black Matrix Compensation Modes

[0215]

[0216] In Table 1, the first direction X represents the positive projection of the misalignment amount of the display panel along the fourth direction W in the first direction X.

[0217] Among the six compensation modes in Table 1, Mode 2 has the largest pixel aperture loss. The compensation structure has a large coverage area, resulting in a low aperture ratio. Mode 5 has the smallest aperture loss (higher aperture ratio), but has a greater risk of light leakage. For a display panel with a low pixel density unit (Pixels Per Inch, abbreviated as PPI) < 150, bilateral compensation of BM_Data has little impact on the aperture. Taking a display panel with a size of 14.6 inches (pixel size 168.3 microns * 168.3 microns) and a bending radius R of 780 mm as an example, compared with the compensation mode of bilateral compensation of 7 microns on both sides of the black matrix structure BM, the pixel aperture ratio of the compensation mode of unilateral compensation of 7 microns on the black matrix structure can be increased by 10%. In an exemplary embodiment, the aperture ratio can be the ratio of the area of the light-transmissible part of the pixel to the total area of the pixel, or the aperture ratio can be the ratio of the area through which light can pass after removing the blocked part of the black matrix layer 111 and the wiring part in the pixel to the overall area of the pixel, or the aperture ratio can be the ratio of the light-transmissible part to the overall area of the pixel in the overall area of the pixel.

[0218] The compensation modes of the first black matrix structure 1111 and the third black matrix structure 1113 are described below:

[0219] (1) BM_Data Offset Direction Compensation - Asymmetric Compensation

[0220] As shown in Figures 6a to 6c , the display panel bends towards the side away from the first substrate 11 of the second substrate 12. Before the display panel bends (as shown in Figure 6a ), in the plane of the display panel, for any one of the first black matrix structures 1111, a first compensation structure b1 is set on the side close to the first median line Q-Q, with a compensation amount of St1, and no compensation structure may be set on the side far from the first median line. Figure 6b In the case where the first compensation structure is not set, after the display panel bends, a misalignment amount shift occurs between each first black matrix structure 1111 and the corresponding signal line 121 along the fourth direction W on the side close to the first median line. Figure 6a The compensation amount St1 of the first compensation structure b1 along the fourth direction W in Figure 6b is the same (equal or approximate) as the corresponding misalignment amount shift along the fourth direction W in Figure 6cA curved display panel formed by bending a first compensation structure b1 is provided on one side of a first black matrix structure 1111 close to a first center line Q-Q. After the display panel is bent, the positive projection of a first signal line 121 on a first substrate 11 falls within the positive projection range of the first black matrix structure 1111 on the first substrate 11. When the first compensation structure b1 is reasonably set, the positive projection of the center line of the first signal line 121 extending along a second direction Y on the first substrate 11 overlaps with the positive projection of the center line of the first black matrix structure 1111 extending along the second direction Y on the first substrate 11.

[0221] As Figures 6b to 6d shown is a schematic cross-sectional view after the display panel is bent. Figure 6b The structure shown does not compensate the first black matrix structure 1111 before the display panel is bent. Figure 6c And Figure 6d The structure shown compensates the first black matrix structure 1111 before the display panel is bent. The compensation amount St1 is the dimension of the first compensation structure b1 along a fourth direction W.

[0222] As Figures 7a to 7d shown, the display panel is bent along the side of the first substrate 11 away from the second substrate 12. The first compensation structure b1 is provided on the side of the first body structure a1 away from the first center line Q-Q, and the first compensation amount St1 is equal to or close to the corresponding misalignment amount Shift (as Figure 7b shown).

[0223] As Figures 7b to 7d shown is a schematic cross-sectional view after the display panel is bent. Figure 7b The structure shown does not compensate the first body structure a1 before the display panel is bent. Figure 7c And Figure 7d The structure shown compensates the first body structure a1 before the display panel is bent.

[0224] In the compensation methods shown in FIGS. 6 and 7, the first compensation structure b1 is provided only on one side of the first body structure a1.

[0225] (2) Compensation on both sides of BM_Data - symmetric with respect to SD

[0226] As Figure 8 shown, before the display panel is bent, in the plane of the display panel, for any first black matrix structure 1111 located on both sides of the first center line, a first compensation amount St1 (i.e., the dimension of the first compensation structure and the second compensation structure along the fourth direction) is compensated along a first direction X on the side close to the first center line and on the side away from the first center line. That is, Figure 8 shown, the first compensation structure b1 and the second compensation structure b2 are provided on both sides of the first body structure a1.

[0227] (3) BM_PS XY-direction simultaneous compensation

[0228] As shown in FIG. 9, before the display panel is bent, in the plane of the display panel, for any third black matrix structure 1113, a second compensation amount St2 (the dimension of the third compensation structure b3 along the fourth direction W) is compensated on both the side away from the first center line and the side close to the first center line along the first direction X, and a third compensation amount St3 (the dimensions of the fifth compensation structure b5 and the sixth compensation structure b6 along the second direction Y) is compensated on both the side away from the second center line and the side close to the second center line along the second direction Y, where the second center line is the center line of the display panel extending along the first direction (extending along the fourth direction after the display panel is bent).

[0229] (4) BM_PS offset direction compensation

[0230] As shown in FIG. 10, before the display panel is bent, in the plane of the display panel, a second compensation amount St2 is compensated on one side of any third black matrix structure 1113 along the first direction X. The second compensation amount St2 can be the dimension of the third compensation structure b3 along the first direction X before the display panel is bent and the dimension of the third compensation structure b3 along the fourth direction after the display panel is bent.

[0231] For the above (1)-(4) compensation methods, the magnitude of the compensation amount can be without regional distinction, and all compensation positions are compensated according to the maximum misalignment amount, or each black matrix structure is compensated according to the misalignment amount of its own position; another compensation method is to divide the display panel into different regions according to the distribution of the misalignment amount shift after the display panel is bent, and the compensation amount of each region is generally consistent with the misalignment amount of that region. The specific compensation method for dividing regions can refer to the description of compensation by region division shown in Figure 11 and Figure 12 shown above.

[0232] Figure 11 and Figure 12The method of dividing different regions for compensation as shown. Since the misalignment amounts of each region are different, the compensation amounts of each black matrix structure will also be different, which usually leads to inconsistent aperture ratios of the overall display panel and thus inconsistent brightness of the display panel in different regions. The brightness consistency of different regions can be achieved by adjusting the backlight brightness of the display panel (for example, increasing the backlight current in the place with a large compensation amount), or the problem of inconsistent brightness of the display panel can be improved by adjusting the pixel electrodes 124 (PITO) on the second substrate 12 in different regions (such as adjusting the size of the pixel electrode 124 along the fourth direction in the same pixel; when there are multiple pixel electrodes 124 in the same pixel, the distance between the multiple pixel electrodes 124 along the fourth direction and the size of the pixel electrode 124 along the first direction can be adjusted simultaneously), or the problem of inconsistent brightness of the display panel can be improved by the matching design of the liquid crystal cell thickness (for example, adding a film layer on the liquid crystal layer in the region with a low aperture ratio to reduce the transmittance so that the overall transmittance of the display panel remains consistent). In the embodiments of the present disclosure, one or more of the above methods of adjusting the pixel electrodes 124 in different regions, the matching design of the liquid crystal cell thickness, and adjusting the backlight brightness of different regions can be adopted to improve the problem of inconsistent brightness in different regions of the display panel.

[0233] The embodiments of the present disclosure also provide a display device, including the display panel described in any of the above embodiments.

[0234] In the embodiments of the present disclosure, the display device can be an electronic device with a display function such as a mobile phone, a computer, a television (TV), a medical monitoring device, a vehicle-mounted central control device, etc.

[0235] For the display panel and the display device provided by the embodiments of the present disclosure, by arranging the first compensation structure on one side of only a first body structure in the black matrix layer, the positive projection of the first signal line on the second substrate is located within the positive projections of the corresponding first body structure and the first compensation structure on the second substrate, which largely avoids the phenomenon of color crosstalk in the curved display panel and light leakage in the dark state picture effect of the display panel.

[0236] The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0237] Without conflict, the features in the embodiments of the present disclosure, that is, the embodiments, can be combined with each other to obtain new embodiments.

[0238] Although the implementation manners disclosed in the embodiments of the present disclosure are as above, the content is only the implementation manners adopted for facilitating the understanding of the embodiments of the present disclosure, and is not used to limit the embodiments of the present disclosure. Any person skilled in the art within the field to which the embodiments of the present disclosure pertain may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the embodiments of the present disclosure. However, the scope of patent protection of the embodiments of the present disclosure shall still be subject to the scope defined by the appended claims.

Claims

1. A display panel, comprising: A first substrate and a second substrate which are oppositely arranged, and the first substrate and the second substrate are curved surface structures; The first substrate includes a first base, and a black matrix layer provided on a side of the first base close to the second substrate; The second substrate includes a second base, and a plurality of first signal lines provided on a side of the second base close to the first substrate. The plurality of first signal lines extend in a second direction and are arranged in a fourth direction. In the curved surface where the second substrate is located, the fourth direction intersects with the second direction; The black matrix layer includes a plurality of first body structures corresponding to the plurality of first signal lines. A first compensation structure is provided on one side of at least one of the first body structures. In the curved surface where the first substrate is located, the first body structure and the first compensation structure extend in the second direction and are arranged in the fourth direction. In the curved surface where the first substrate is located, the fourth direction intersects with the second direction; The orthographic projection of any one of the first signal lines on the second substrate is located within the orthographic projection ranges of the corresponding first body structure and the first compensation structure on the second substrate; The display panel includes a first side and a second side which are oppositely arranged in the fourth direction. On the curved surface where the display panel is located, between the first median line and the first side, the dimension in the fourth direction of the first compensation structure from the position close to the third median line to the position far from the third median line gradually decreases; between the first median line and the second side, the dimension in the fourth direction of the first compensation structure from the position close to the fourth median line to the position far from the fourth median line gradually decreases; The first median line is the median line of the display panel extending in the second direction, the third median line is the median line of the display panel extending in the second direction between the first median line and the first side, and the fourth median line is the median line of the display panel extending in the second direction between the first median line and the second side.

2. The display panel according to claim 1, wherein, The display panel bends towards the side of the second substrate away from the first substrate. In the fourth direction, in any group of the first body structure and the first compensation structure, the first compensation structure is located between the first body structure and the first median line; or, the display panel bends towards the side of the first substrate away from the second substrate. In the fourth direction, in any group of the first body structure and the first compensation structure, the first body structure is located between the first compensation structure and the first median line.

3. The display panel according to claim 1, wherein, In the curved surface where the display panel is located, the display panel is divided into a plurality of regions in the fourth direction. The plurality of regions include a first region and two k-th regions, where 2 ≤ k ≤ N, and N is a positive integer greater than or equal to 2. For any two regions corresponding to a value of k, they are symmetrically arranged with respect to the first median line in the fourth direction; The dimensions of the plurality of first compensation structures located in the first region are the same in the fourth direction, and the dimensions of the plurality of first compensation structures located in the regions corresponding to the same value of k are the same in the fourth direction.

4. The display panel according to claim 3, wherein, N = 3, the multiple regions include a first region, two second regions, and two third regions. The first region is symmetrically arranged with respect to the first median line along the fourth direction. The two second regions are symmetrically arranged with respect to the first median line along the fourth direction. The two third regions are symmetrically arranged with respect to the first median line along the fourth direction. For the display panel located between the first median line and the first side, the first region and the third region are symmetrically arranged with respect to the third median line along the fourth direction, and the second region is symmetrically arranged with respect to the third median line along the fourth direction. For the display panel located between the first median line and the second side, the first region and the third region are symmetrically arranged with respect to the fourth median line along the fourth direction, and the second region is symmetrically arranged with respect to the fourth median line along the fourth direction.

5. The display panel according to claim 1, wherein, In the curved surface where the display panel is located, on each side of the first median line, it is divided into N - 2 concentric annular regions. The region at the inner center position of the annular region is the first region, and the region at the outer periphery of the annular region is the Nth region. Any one of the Jth regions on the display panel includes two, where J ranges from 1 to N. The two Jth regions are located on both sides of the first median line and are symmetric with respect to the first median line in the fourth direction. Any one of the Jth regions is symmetrically arranged with respect to the second median line, and the second median line is the median line of the display panel extending along the fourth direction. The dimensions of the multiple first compensation structures located at the position of the first region are the same along the fourth direction. The dimensions of the multiple first compensation structures located in the region corresponding to the same J value are the same along the fourth direction.

6. The display panel according to claim 5, wherein, N = 3, the multiple regions include two first regions, two second regions, and two third regions. The second region is an annular region. The first region is located at the central position of the annular region of the second region, and the third region is located at the outer peripheral region of the annular region of the second region.

7. The display panel according to claim 6, wherein On the curved surface where the display panel is located, on the same side of the first median line, the dimension of the first compensation structure gradually decreases along the fourth direction from the first compensation structure in the region closer to the central position of the annular region to the first compensation structure in the region farther from the central position of the annular region.

8. The display panel according to claim 5, wherein, On the curved surface where the display panel is located, on the same side of the first median line, the dimension of the first compensation structure gradually decreases along the fourth direction from the first compensation structure in the region closer to the central position of the annular region to the first compensation structure in the region farther from the central position of the annular region.

9. The display panel according to claim 1, wherein, In the curved surface where the display panel is located, the dimension of the first compensation structure along the fourth direction is set according to at least one of the dimensions of the first substrate and the second substrate along the bending direction, the dimensions of the first substrate and the second substrate along the second direction, the dimensions of the first substrate and the second substrate along the fourth direction, and the curvature radius of the display panel. The curvature radius of the display panel is the curvature radius of the curved surface where the display panel is located.

10. The display panel according to any one of claims 1 to 9, wherein, In the curved surface where the display panel is located, the dimension of the first compensation structure along the fourth direction is proportional to the dimensions of the first substrate and the second substrate along the bending direction.

11. The display panel according to claim 10, wherein, When the dimensions of the first substrate and the second substrate in the second direction, the dimensions of the first substrate and the second substrate in the fourth direction, and the radius of curvature of the display panel all remain unchanged, the dimension of the first compensation structure in the fourth direction has a linear relationship with the sum of the dimensions of the first substrate and the second substrate in the bending direction.

12. The display panel according to any one of claims 1 to 9, wherein, Within the curved surface where the display panel is located, the dimension of the first compensation structure in the fourth direction is proportional to the dimensions of the first substrate and the second substrate in the fourth direction.

13. The display panel according to claim 12, wherein, When the dimensions of the first substrate and the second substrate in the bending direction, the aspect ratio of the display panel, and the radius of curvature of the display panel all remain unchanged, the dimension of the first compensation structure in the fourth direction has a linear relationship with the dimensions of the first substrate and the second substrate in the fourth direction; the aspect ratio is the ratio of the dimension of the display panel in the second direction to the dimension of the display panel in the fourth direction.

14. The display panel according to any one of claims 1 to 9, wherein, Within the range where the aspect ratio is greater than or equal to 10% and less than or equal to 60%, when the radius of curvature, the dimensions of the first substrate and the second substrate in the bending direction, and the dimensions of the first substrate and the second substrate in the fourth direction all remain unchanged, the dimension of the first compensation structure in the fourth direction is proportional to the aspect ratio. The aspect ratio is the ratio of the dimension of the display panel in the second direction to the dimension of the display panel in the fourth direction.

15. The display panel according to any one of claims 1 to 9, wherein, The dimension of the first compensation structure in the fourth direction is proportional to the displacement of the display panel in the bending direction. The displacement of the display panel in the bending direction is the vertical distance between the midline position of the display panel extending in the second direction of the curved surface structure and the midpoint position of the line connecting the two ends of the display panel of the curved surface structure.

16. The display panel according to claim 15, wherein, When the dimensions of the first substrate and the second substrate in the second direction, the dimensions of the first substrate and the second substrate in the fourth direction, and the dimensions of the first substrate and the second substrate in the bending direction all remain unchanged, the dimension of the first compensation structure in the fourth direction has a linear relationship with the displacement of the display panel in the bending direction.

17. The display panel according to claim 15, wherein, The displacement of the display panel in the bending direction has the following relationship with the radius of curvature of the display panel: M = R – R * cos((L / 2) / R); Wherein, L is the dimension of the display panel in the fourth direction, R is the radius of curvature of the curved surface where the display panel is located, and M is the displacement in the bending direction of the display panel.

18. The display panel according to any one of claims 1 to 9, wherein, The black matrix layer further includes a second compensation structure, and the second compensation structure and the first compensation structure are symmetrically arranged with respect to the midline extending in the second direction of the first body structure.

19. The display panel according to any one of claims 1 to 9, wherein, The first substrate further includes a plurality of color resist elements disposed on the side of the first substrate close to the second substrate. Within the curved surface where the first substrate is located, the plurality of color resist elements are alternately arranged with the first body structure and the first compensation structure in the fourth direction and extend in the second direction.

20. The display panel according to claim 19, wherein, The first substrate is further provided with a first alignment layer and a plurality of support structures. The black matrix layer and the plurality of color resist elements are located between the first alignment layer and the first substrate, and the support structures are arranged on a side of the first alignment layer close to the second substrate; The black matrix layer further includes a plurality of third body structures corresponding to the plurality of support structures. At least one of the third body structures is provided with a third compensation structure. In the curved surface where the first substrate is located, the third compensation structure is located on one side of the third body structure in a fourth direction; The orthographic projection of the support structure on the second substrate is located within the orthographic projection ranges of the third body structure and the third compensation structure on the second substrate; There is an overlapping area between the third body structure and the first body structure; the dimensions of the third body structure and the third compensation structure in the fourth direction are greater than the dimensions of the first body structure and the first compensation structure in the fourth direction.

21. The display panel according to claim 20, wherein, The display panel is bent toward a side of the second substrate away from the first substrate. In the fourth direction, in any set of the third body structure and the third compensation structure, the third compensation structure is located between the third body structure and the first midline; or, the display panel is bent toward a side of the first substrate away from the second substrate. In the fourth direction, in any set of the third body structure and the third compensation structure, the third body structure is located between the third compensation structure and the first midline; wherein, the first midline is the midline along which the display panel extends in a second direction.

22. The display panel according to claim 21, wherein, A plurality of second signal lines and vias are further provided on a side of the second substrate close to the first substrate. The second signal lines extend in the fourth direction in the curved surface where the second substrate is located and are arranged along the second direction; The black matrix layer further includes a plurality of second body structures corresponding to the plurality of second signal lines. The plurality of second body structures extend in the fourth direction in the curved surface where the first substrate is located and are arranged along the second direction; The orthographic projections of the plurality of second signal lines and the vias on the second substrate are located within the orthographic projection range of the corresponding second body structure on the second substrate; There is an overlapping area among the first body structure, the second body structure, and the third body structure.

23. The display panel according to claim 21, wherein, The black matrix layer further includes a fourth compensation structure, and the fourth compensation structure is symmetrically arranged with respect to the midline of the third body structure extending in the second direction with the third compensation structure.

24. The display panel according to claim 20, wherein, The black matrix layer further includes a fifth compensation structure and a sixth compensation structure, and the fifth compensation structure and the sixth compensation structure are symmetrically arranged with respect to the midline of the third body structure extending in the fourth direction.

25. A display device, including at least one display panel according to any one of claims 1 to 24.

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