A display panel, a display device, and a method of manufacturing.

Abstract

This invention discloses a display panel, a display device, and a manufacturing method. One embodiment of the display panel includes: an array substrate, a counter substrate, and a sealant disposed in a non-display area for aligning the array substrate and the counter substrate. The counter substrate includes a first substrate; a black matrix layer disposed on the first substrate, the black matrix layer including a first annular opening disposed in the non-display area, surrounding the display area and penetrating the black matrix layer; an annular auxiliary pad disposed on the black matrix layer; a first planarization layer covering the annular auxiliary pad and the black matrix layer; and at least one annular spacer wall disposed on the first planarization layer. In the orthographic projection of the first substrate, the annular auxiliary pad surrounds the annular spacer wall, the sealant surrounds the annular auxiliary pad, and the first annular opening surrounds the sealant. The display panel provided by this invention can improve the cell thickness unevenness problem of liquid crystal display panels while avoiding electrostatic discharge defects, and has practical application value.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel, display device, and manufacturing method. Background Technology

[0002] In LCD panels, a low-impedance black matrix is ​​typically used. This causes static electricity generated in the non-display areas to be transmitted to the display area through the black matrix, resulting in poor electrostatic discharge (ESD). Specifically, when static electricity accumulates to a certain level in electronic products, ESD can lead to electrostatic damage, affecting the performance and shortening the lifespan of the electronic products. Especially for some low-frequency products, accumulated static charge in the display area can easily cause screen flickering. Summary of the Invention

[0003] To address at least one of the aforementioned problems, a first aspect of the present invention provides a display panel, comprising a display area and a non-display area surrounding the display area, including an array substrate, a counter substrate disposed opposite to the array substrate, and a sealing adhesive disposed in the non-display area for mounting the array substrate and the counter substrate; wherein the counter substrate includes

[0004] First substrate;

[0005] A black matrix layer disposed on the first substrate, the black matrix layer including a first annular opening disposed in the non-display area, surrounding the display area and penetrating the black matrix layer;

[0006] An annular auxiliary pad, located in the non-display area and surrounding the display area, is disposed on the black matrix layer;

[0007] A first planarization layer covering the annular auxiliary pad, the black matrix layer, and the exposed first substrate; and

[0008] At least one annular spacer wall located in the non-display area and surrounding the display area is disposed on the first planarization layer;

[0009] The orthographic projection of the annular auxiliary pad on the first substrate surrounds the orthographic projection of the annular spacer wall on the first substrate, the orthographic projection of the sealing adhesive on the first substrate surrounds the orthographic projection of the annular auxiliary pad on the first substrate, and the orthographic projection of the first annular opening on the first substrate surrounds the orthographic projection of the sealing adhesive on the first substrate.

[0010] For example, in some embodiments of the display panel provided in this application, the black matrix layer further includes a second annular opening disposed in the non-display area, surrounding the display area and penetrating the black matrix layer;

[0011] The orthographic projection of the annular septum wall on the first substrate surrounds the orthographic projection of the second annular opening on the first substrate.

[0012] For example, in some embodiments of the present application, the display panel further includes a resin layer covering the second annular opening, wherein the orthographic projection of the second annular opening on the first substrate falls into the orthographic projection of the resin layer on the first substrate.

[0013] For example, in some embodiments of the display panel provided in this application, the second annular opening is located at a distance of 0.55 mm or more from the outer edge of the display area on the side closest to the display area.

[0014] For example, in some embodiments of the display panel provided in this application, the thickness of the resin layer is greater than or equal to 0.3 μm compared to the thickness of the first planarization layer in a direction perpendicular to the first substrate.

[0015] For example, in some embodiments of the display panel provided in this application, the outer edge of the black matrix layer is greater than or equal to 0.2 mm and less than or equal to 0.3 mm from the outer edge of the display panel;

[0016] The first planarization layer covers the outer edge of the black matrix layer.

[0017] For example, in some embodiments of the display panel provided in this application, the width of the first annular opening is greater than or equal to 0.03 mm.

[0018] For example, in some embodiments of the display panel provided in this application, the thickness of the annular auxiliary pad is greater than or equal to 0.4 μm compared to the thickness of the first planarization layer in a direction perpendicular to the first substrate.

[0019] For example, in some embodiments of the present application, the display panel further includes a partition wall disposed in the display area for supporting the array substrate and the opposing substrate;

[0020] In the direction perpendicular to the first substrate, the height of the annular septum wall is the same as the height of the septum wall.

[0021] For example, in some embodiments of the present application, the array substrate includes a second substrate and a second planarization layer disposed on the second substrate. The second planarization layer includes at least one third annular opening disposed in the non-display area, surrounding the display area and penetrating the second planarization layer.

[0022] The orthographic projection of the third annular opening on the second substrate falls into the orthographic projection of the sealing adhesive on the second substrate;

[0023] After the array substrate and the opposing substrate are assembled, the orthographic projection of the third annular opening on the second substrate is greater than or equal to 0.3 mm from the orthographic projection of the first annular opening on the second substrate.

[0024] A second aspect of the present invention provides a display device including a display panel as described in the first aspect.

[0025] A third aspect of the present invention provides a method for manufacturing a display panel as described in the first aspect, comprising:

[0026] A black matrix layer is formed on the first substrate;

[0027] The black matrix layer is patterned to form a first annular opening disposed in the non-display area of ​​the display panel, surrounding the display panel and penetrating the black matrix layer;

[0028] An annular auxiliary pad, located in the non-display area and surrounding the display area, is formed on the black matrix layer;

[0029] A first planarization layer is formed covering the annular auxiliary pad, the black matrix layer, and the exposed first substrate;

[0030] At least one annular spacer wall is formed on the first planarization layer, located in the non-display area and surrounding the display area, wherein the orthographic projection of the annular auxiliary pad on the first substrate surrounds the orthographic projection of the annular spacer wall on the first substrate, the orthographic projection of the sealing adhesive on the first substrate surrounds the orthographic projection of the annular auxiliary pad on the first substrate, and the orthographic projection of the first annular opening on the first substrate surrounds the orthographic projection of the sealing adhesive on the first substrate.

[0031] The beneficial effects of this invention are as follows:

[0032] This invention addresses existing problems by providing a display panel, display device, and manufacturing method. By sequentially surrounding the display area with annular partition walls, annular auxiliary pads, and a first annular opening in different layers of the non-display area, it effectively prevents static electricity from entering the display area, improves the support performance of the non-display area, and balances the cell thickness of the display panel. This overcomes the problems existing in the prior art, effectively improves the display effect, extends the service life of the display panel, and enhances the user experience, thus having broad application prospects. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This diagram illustrates the structure of a display panel according to an embodiment of the present invention.

[0035] Figure 2 A top view of the display panel according to an embodiment of the present invention is shown;

[0036] Figure 3 A schematic diagram of the structure of the display panel according to another embodiment of the present invention is shown;

[0037] Figure 4 A schematic diagram of the structure of the display panel according to another embodiment of the present invention is shown;

[0038] Figure 5 A schematic diagram of the structure of the display panel according to another embodiment of the present invention is shown;

[0039] Figure 6 A schematic diagram of the structure of the display panel according to another embodiment of the present invention is shown;

[0040] Figure 7 A top view of the display panel according to another embodiment of the present invention is shown;

[0041] Figure 8 A flowchart illustrating a manufacturing method according to an embodiment of the present invention is shown. Detailed Implementation

[0042] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments and accompanying drawings, further explains the invention. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.

[0043] It should be noted that the terms "on," "formed on," and "set on" used in this document can indicate that one layer is directly formed or set on another layer, or that one layer is indirectly formed or set on another layer, meaning that there are other layers between the two layers. In this document, unless otherwise stated, the term "located on the same layer" means that two layers, components, elements, or parts can be formed through the same patterning process, and that these two layers, components, elements, or parts are generally formed of the same material. In this document, unless otherwise stated, the description of "patterning process" generally includes steps such as photoresist coating, exposure, development, etching, and photoresist stripping. The description of "one-time patterning process" refers to a process that uses a single photomask to form patterned layers, components, elements, etc.

[0044] In related technologies, the method of grooves in the black matrix layer on the outside of the sealing glue is usually used to avoid static electricity problems. However, some charge still enters the display area. At the same time, the grooves in the black matrix layer and the partition walls in the non-display area to increase the support performance of the non-display area cause the film layer in the non-display area to bulge, resulting in uneven cell thickness.

[0045] In response to the above situation, such as Figure 1 As shown, one embodiment of the present invention provides a display panel, including a display area 200 and a non-display area 100 surrounding the display area 200. The display panel includes an array substrate 20, an opposing substrate 10 disposed opposite to the array substrate 20, and a sealing adhesive 30 disposed in the non-display area 100 for mounting the array substrate 20 and the opposing substrate 10; wherein, the opposing substrate 10 includes

[0046] First substrate 11;

[0047] A black matrix layer 12 is disposed on the first substrate 11, the black matrix layer 12 including a first annular opening 121 disposed in the non-display area 100, surrounding the display area 200 and penetrating the black matrix layer 12;

[0048] An annular auxiliary pad 13 is disposed on the black matrix layer 12 in the non-display area 100 and surrounding the display area 200;

[0049] The first planarization layer 14 covers the annular auxiliary pad 13, the black matrix layer 12, and the exposed first substrate 11; and

[0050] At least one annular spacer wall 15 located in the non-display area 100 and surrounding the display area 200 is disposed on the first planarization layer 14;

[0051] The orthographic projection of the annular auxiliary pad 13 on the first substrate 11 surrounds the orthographic projection of the annular spacer wall 15 on the first substrate 11, the orthographic projection of the sealing adhesive 30 on the first substrate 11 surrounds the orthographic projection of the annular auxiliary pad 15 on the first substrate 11, and the orthographic projection of the first annular opening 121 on the first substrate 11 surrounds the orthographic projection of the sealing adhesive 30 on the first substrate 11.

[0052] In this embodiment, as Figure 1 and Figure 2 As shown, Figure 2 This is a top view of the display panel. Figure 1 for Figure 2 In the cross-sectional view at AA', a first annular opening 121 is provided at the edge of the black matrix layer 12 near the display panel and on the side of the sealing adhesive 30 away from the display area. The first annular opening 121 divides the black matrix layer into two independent parts 122 and 123. Specifically, the width of the first annular opening in this embodiment is greater than or equal to 0.03 mm, thereby preventing static electricity from entering to a certain extent. At the same time, an annular spacer wall 15 is provided in the non-display area 100 near the display area 200 to improve the support performance of the non-display area 100. Considering that the first annular opening 121 and the annular spacer wall 15 cause uneven cell thickness due to the protrusion of the film layer in the non-display area, an annular auxiliary pad 13 is provided on the black matrix layer 12 on the side of the annular spacer wall 15 away from the display area 200. Specifically, in the direction perpendicular to the first substrate, the thickness of the annular auxiliary pad in this embodiment is greater than or equal to 0.4 μm compared to the thickness of the first planarization layer, thereby increasing the thickness of the film layer in the non-display area and effectively improving the cell thickness uniformity of the non-display area. In other words, by setting annular partition walls, annular auxiliary pads, and a first annular opening sequentially around the display area in different layers of the non-display area, this embodiment can not only effectively prevent static electricity from entering the display area, but also improve the support performance of the non-display area and balance the cell thickness of the display panel, thereby making up for the problems existing in the prior art, effectively improving the display effect, improving the service life of the display panel, and thus improving the user experience, and has broad application prospects.

[0053] Considering that electrostatic charges may enter the display area and affect the display effect of the display panel, in an optional embodiment, such as Figure 3 As shown, the black matrix layer 12 further includes a second annular opening 124 disposed in the non-display area 100, surrounding the display area 200 and penetrating the black matrix layer 12; the orthographic projection of the annular spacer wall 15 on the first substrate 11 surrounds the orthographic projection of the second annular opening 124 on the first substrate 11.

[0054] In this embodiment, by providing a second annular opening 124 on the black matrix layer 12 at a position near the display area of ​​the annular partition wall, the black matrix layer is again divided into two mutually insulated parts, thereby further preventing electrostatic charges from entering the display area and blocking the influence of external charges on the display area, thus further improving the antistatic performance of the display panel. Specifically, the second annular opening 124 is located at least 0.55 mm away from the outer edge of the display area 200 on the side near the display area 200.

[0055] Considering that a partition wall for supporting the array substrate and the opposing substrate is provided in the display area, the height of the annular partition wall in this embodiment is the same as the height of the partition wall in the direction perpendicular to the first substrate. That is, by providing an annular partition wall with the same height as the partition wall in the display area in the non-display area, the support performance of the non-display area of ​​the display panel is effectively increased, thereby improving the display effect of the display panel.

[0056] Considering that openings near the display area in the black matrix layer can easily cause light leakage, in an optional embodiment, such as Figure 4 As shown, the opposing substrate further includes a resin layer 125 covering the second annular opening 124, and the orthographic projection of the second annular opening 124 on the first substrate 11 falls into the orthographic projection of the resin layer 125 on the first substrate 11.

[0057] In this embodiment, by covering the second annular opening with a resin layer 125, the light leakage problem caused by the second annular opening is effectively solved, thereby further improving the display effect of the display panel. Specifically, in the direction perpendicular to the first substrate, the thickness of the resin layer is greater than or equal to 0.3 μm compared to the thickness of the first planarization layer, fully covering the second annular opening to avoid light transmission.

[0058] Considering that the flush design of the black matrix layer with the display panel can easily introduce electrostatic charges, in an optional embodiment, such as Figure 5 As shown, the outer edge of the black matrix layer 12 is greater than or equal to 0.2 mm and less than or equal to 0.3 mm from the outer edge of the display panel, and the first planarization layer covers the outer edge of the black matrix layer.

[0059] In this embodiment, by recessing the black matrix layer relative to the first substrate 11 to form a notch 126, the first planarization layer covers the outer edge of the black matrix layer 12. This further isolates external charges from entering the display panel through the black matrix layer 12 via the insulating first planarization layer. In other words, the non-flush-edge arrangement of the black matrix layer further improves the anti-static performance of the display panel.

[0060] In an optional embodiment, such as Figure 6As shown, the array substrate 20 includes a second substrate 21 and a second planarization layer 22 disposed on the second substrate 21. The second planarization layer 22 includes at least one third annular opening 23 disposed in the non-display area 100, surrounding the display area 200 and penetrating the second planarization layer 22. The orthographic projection of the third annular opening 23 on the second substrate 21 falls into the orthographic projection of the sealing adhesive 30 on the second substrate 21. After the array substrate 20 and the opposing substrate 10 are assembled, the orthographic projection of the third annular opening 23 on the second substrate 21 is greater than or equal to 0.3 mm from the orthographic projection of the first annular opening 121 on the second substrate 21.

[0061] This embodiment further prevents external charges from entering the display panel by matching the positions of the first annular interface 121 on the opposing substrate 10, the third annular opening 23 on the array substrate 20, and the sealing adhesive 30 used to align the array substrate 20 and the opposing substrate 10, thereby effectively improving the display effect of the display panel.

[0062] like Figure 6 and Figure 7 The image shown is a specific embodiment of this application. Figure 7 This is a top view of the display panel. Figure 6 for Figure 7 The cross-sectional view at BB' shows a second annular opening 124 located in the non-display area 100 of the opposing substrate 10 near the display area 200, and a resin layer 125 covering the second annular opening 124. The second annular opening 124 prevents external charges from entering the display area of ​​the display panel, while the resin layer 125 prevents light leakage caused by the second annular opening 124. Two annular spacers 151 and 152 are located on the planarization layer 14 on the side of the second annular opening 124 and resin layer 125 away from the display area to improve the support performance of the non-display area. An annular auxiliary pad 13 is provided on the black matrix layer on the side away from the display area to raise the display film layer, so that the cell thickness of the non-display area is more uniform and flat. On the side of the sealing glue away from the display area, a first annular opening 121 is provided on the black matrix layer to prevent external charges from entering the display panel. Thus, in the direction away from the display area in the non-display area, by providing annular spacer walls, annular auxiliary pads, annular openings and resin layers on different layers, it is not only possible to effectively prevent static electricity from entering the display area, but also to improve the support performance of the non-display area and balance the cell thickness of the display panel, effectively improving the display effect of the display panel, thereby improving the user experience, and has broad application prospects.

[0063] Corresponding to the display panel provided in the above embodiments, one embodiment of this application also provides a method for manufacturing the above-mentioned display panel, such as... Figure 8 As shown, it includes:

[0064] A black matrix layer is formed on the first substrate;

[0065] The black matrix layer is patterned to form a first annular opening disposed in the non-display area of ​​the display panel, surrounding the display panel and penetrating the black matrix layer;

[0066] An annular auxiliary pad, located in the non-display area and surrounding the display area, is formed on the black matrix layer;

[0067] A first planarization layer is formed covering the annular auxiliary pad, the black matrix layer, and the exposed first substrate;

[0068] At least one annular spacer wall is formed on the first planarization layer, located in the non-display area and surrounding the display area, wherein the orthographic projection of the annular auxiliary pad on the first substrate surrounds the orthographic projection of the annular spacer wall on the first substrate, the orthographic projection of the sealing adhesive on the first substrate surrounds the orthographic projection of the annular auxiliary pad on the first substrate, and the orthographic projection of the first annular opening on the first substrate surrounds the orthographic projection of the sealing adhesive on the first substrate.

[0069] This embodiment, by setting annular partition walls, annular auxiliary pads, and a first annular opening sequentially around the display area in different layers of the non-display area, not only effectively prevents static electricity from entering the display area, but also improves the support performance of the non-display area and balances the cell thickness of the display panel. This overcomes the problems existing in the prior art, effectively improves the display effect, extends the lifespan of the display panel, and ultimately enhances the user experience, demonstrating broad application prospects. Specific implementation details of this embodiment are found in the foregoing embodiments and will not be repeated here.

[0070] Another embodiment of the present invention provides a display device including the above-mentioned display panel, and the display device is a liquid crystal display device, which can be any product or component with display function such as mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame or navigator.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A display panel, comprising a display area and a non-display area surrounding the display area, characterized in that, It includes an array substrate, a counter substrate disposed opposite to the array substrate, and a sealing adhesive disposed in the non-display area for aligning the array substrate and the counter substrate; wherein, the counter substrate includes First substrate; A black matrix layer disposed on the first substrate, the black matrix layer including a first annular opening disposed in the non-display area, surrounding the display area and penetrating the black matrix layer, the width of the first annular opening being greater than or equal to 0.03 mm; An annular auxiliary pad, located in the non-display area and surrounding the display area, is disposed on the black matrix layer; A first planarization layer covering the annular auxiliary pad, the black matrix layer, and the exposed first substrate, wherein, in a direction perpendicular to the first substrate, the thickness of the annular auxiliary pad is greater than or equal to 0.4 μm compared to the thickness of the first planarization layer; and The display panel includes at least one annular spacer wall located in the non-display area and surrounding the display area on the first planarization layer. The display panel also includes a spacer wall disposed in the display area for supporting the array substrate and the opposing substrate. In the direction perpendicular to the first substrate, the height of the annular spacer wall is the same as the height of the spacer wall. The orthographic projection of the annular auxiliary pad on the first substrate surrounds the orthographic projection of the annular spacer wall on the first substrate, the orthographic projection of the sealing adhesive on the first substrate surrounds the orthographic projection of the annular auxiliary pad on the first substrate, and the orthographic projection of the first annular opening on the first substrate surrounds the orthographic projection of the sealing adhesive on the first substrate. The annular spacer wall, the annular auxiliary pad, the sealing adhesive, and the first annular opening form a combined structure.

2. The display panel according to claim 1, characterized in that, The black matrix layer also includes a second annular opening disposed in the non-display area, surrounding the display area and penetrating the black matrix layer; The orthographic projection of the annular septum wall on the first substrate surrounds the orthographic projection of the second annular opening on the first substrate.

3. The display panel according to claim 2, characterized in that, The opposing substrate further includes a resin layer covering the second annular opening, wherein the orthographic projection of the second annular opening on the first substrate falls into the orthographic projection of the resin layer on the first substrate.

4. The display panel according to claim 3, characterized in that, The second annular opening is located at least 0.55 mm from the outer edge of the display area on the side closest to the display area. and / or In a direction perpendicular to the first substrate, the thickness of the resin layer is greater than or equal to 0.3 μm compared to the thickness of the first planarization layer.

5. The display panel according to claim 1, characterized in that, The outer edge of the black matrix layer is greater than or equal to 0.2 mm and less than or equal to 0.3 mm from the outer edge of the display panel; The first planarization layer covers the outer edge of the black matrix layer.

6. The display panel according to claim 1, characterized in that, The array substrate includes a second substrate and a second planarization layer disposed on the second substrate. The second planarization layer includes at least one third annular opening disposed in the non-display area, surrounding the display area and penetrating the second planarization layer. The orthographic projection of the third annular opening on the second substrate falls into the orthographic projection of the sealing adhesive on the second substrate; After the array substrate and the opposing substrate are assembled, the orthographic projection of the third annular opening on the second substrate is greater than or equal to 0.3 mm from the orthographic projection of the first annular opening on the second substrate.

7. A display device, characterized in that, Includes the display panel as described in any one of claims 1-6.

8. A method for manufacturing a display panel as described in any one of claims 1-6, characterized in that, include: A black matrix layer is formed on the first substrate; The black matrix layer is patterned to form a first annular opening disposed in the non-display area of ​​the display panel, surrounding the display area of ​​the display panel and penetrating the black matrix layer, wherein the width of the first annular opening is greater than or equal to 0.03 mm; An annular auxiliary pad, located in the non-display area and surrounding the display area, is formed on the black matrix layer; A first planarization layer is formed covering the annular auxiliary pad, the black matrix layer, and the exposed first substrate, wherein the thickness of the annular auxiliary pad is greater than or equal to 0.4 μm compared to the thickness of the first planarization layer in a direction perpendicular to the first substrate; At least one annular spacer wall is formed on the first planarization layer, located in the non-display area and surrounding the display area. The display panel also includes a spacer wall disposed in the display area for supporting the array substrate and the opposing substrate. In a direction perpendicular to the first substrate, the height of the annular spacer wall is the same as the height of the spacer wall. The orthographic projection of the annular auxiliary pad on the first substrate surrounds the orthographic projection of the annular spacer wall on the first substrate. The orthographic projection of the sealing adhesive on the first substrate surrounds the orthographic projection of the annular auxiliary pad on the first substrate. The orthographic projection of the first annular opening on the first substrate surrounds the orthographic projection of the sealing adhesive on the first substrate. The annular spacer wall, the annular auxiliary pad, the sealing adhesive, and the first annular opening form a combined structure.

Images