WO2021174511A1

WO2021174511A1 - Cover plate, display assembly and display device

Info

Publication number: WO2021174511A1
Application number: PCT/CN2020/078085
Authority: WO
Inventors: 陈启中; 纪冰; 高亮; 李非凡; 张振华; 王东
Original assignee: 京东方科技集团股份有限公司; 成都京东方光电科技有限公司
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2021-09-10
Also published as: CN212256281U

Abstract

Disclosed are a cover plate, a display assembly and a display device, which aim to solve the problem of attaching bubbles at the edge of an AA hole. The cover plate comprises: a transparent substrate (1), which is provided with a visible area (12) and a display area (11) surrounding the visible area (12), wherein the visible area (12) comprises a transmission area (14) and a shading area (13) surrounding the transmission area (14); and a shading part (2), which is located in the shading area (13) of the transparent substrate (1), wherein the shading part (2) comprises at least two shading layers (21), the at least two shading layers (21) are sequentially stacked in a direction perpendicular to the transparent substrate (1), each shading layer (21) annularly surrounds the transmission area (14), and outer side edges (201) of the shading layers (21) sequentially shrink inwards in a direction away from the transparent substrate (1), with the outer side edges (201) being edges close to the display area (11).

Description

Cover plate, display assembly and display device

Technical field

This application relates to the field of display technology, in particular to a cover plate, a display assembly and a display device.

Background technique

As a display component of electronic equipment, OLED display devices have been widely used in various electronic products, and OLED display panels are an important component of display devices. With the advancement of OLED display technology, the camera hole technology has also been greatly developed, and the application of AA Hole technology has now begun. At present, the camera hole is basically designed outside the display area, that is, the water drop screen or the sea screen. Very few camera holes are designed in the display area, that is, AA Hole. For the AA Hole design, the shading ink defining the camera hole on the cover glass (CG, Cover Glass) is in the bonding area of the display module, due to the difference between the ink boundary in the visible area (VA) and the CG surface (ink step surface) There is a height gap with the CG plane), the bonding process is easy to produce bubbles at the contact between the optical adhesive layer (OCA) and the outer boundary of the ink. At present, no structural design plan for reducing the AA Hole bonding bubble has been found.

Summary of the invention

The present application discloses a cover plate, a display assembly and a display device, and the purpose is to improve the problem of the AA Hole edge sticking to the air bubbles.

In order to achieve the above objectives, this application provides the following technical solutions:

A cover plate, including:

A transparent substrate having a visible area and a display area surrounding the visible area, the visible area including a transmission area and a light shielding area surrounding the transmission area;

The light-shielding portion is located in the light-shielding area of the transparent substrate, the light-shielding portion includes at least two light-shielding layers, the at least two light-shielding layers are sequentially stacked in a direction perpendicular to the transparent substrate, and each light-shielding layer surrounds in a ring shape In the transmissive area, in a direction away from the transparent substrate, the outer edges of each light shielding layer are sequentially retracted, and the outer edges are edges close to the display area.

Optionally, the projection pitch of the outer edges of the two adjacent light-shielding layers on the transparent substrate is 0.02 mm-0.15 mm.

Optionally, the thickness of each light shielding layer is 0.006mm-0.008mm.

Optionally, the light-shielding part includes 3 or 4 light-shielding layers.

Optionally, the inner edges of the light shielding layers are aligned, and the inner edges are edges close to the transmission area.

Optionally, the inner diameter of the shading part is 1.98mm-2.18mm, and the outer diameter is 3.46mm-3.66mm.

Optionally, the visible area and the transmission area are both circular areas.

Optionally, the light shielding layer is an ink layer.

A display assembly, including the cover plate described in any one of the above, and further including:

The display module is located on the side of the transparent substrate where the light-shielding layer is provided; the display module is provided with a first hollow area for exposing the transmission area.

Optionally, the display component further includes:

The optical adhesive layer is located between the display module and the transparent substrate; the optical adhesive layer is provided with a second hollow area for exposing the transmission area, and the optical adhesive layer surrounds the second hollow area The edges cover the outer edges of each of the light shielding layers.

Optionally, the diameter of the second hollow area is greater than the diameter of the first hollow area.

Optionally, there is a distance between the projection of the edge of the second hollow area on the transparent substrate and the projection of the inner edge of the light shielding layer on the transparent substrate.

Optionally, the diameter of the second hollow area is 2.75mm-3.05mm.

Optionally, the thickness of the optical adhesive layer is 0.13 mm-0.17 mm.

Optionally, the material of the optical adhesive layer is photosensitive optical adhesive.

Optionally, the display component further includes:

The heat dissipation module is located on the side of the display module away from the transparent substrate; the heat dissipation module is provided with a third hollow area for exposing the transmission area, and the diameter of the third hollow area is larger than the diameter of the third hollow area. The diameter of the second hollow area.

Optionally, the display module is an OLED display module;

The display assembly further includes a polarizer, the polarizer is located between the display module and the optical adhesive layer, and is provided with a fourth hollow area for exposing the transmission area, and an edge of the fourth hollow area The projection on the transparent substrate coincides with the projection of the edge of the first hollow area on the transparent substrate.

A display device includes the display assembly described in any one of the above.

Description of the drawings

FIG. 1 is a schematic structural diagram of a cover plate provided by an embodiment of the application;

2 is a schematic diagram of a partial cross-sectional structure of a cover plate provided by an embodiment of the application;

FIG. 3 is a schematic diagram of a partial cross-sectional structure of a display assembly provided by an embodiment of the application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

As shown in FIG. 1 and FIG. 2, an embodiment of the present application provides a cover plate, including:

The transparent substrate 1 has a visible area 12 and a display area 11 surrounding the visible area 12. The visible area 12 includes a transmission area 14 and a light shielding area 13 surrounding the transmission area 14;

The light-shielding part 2 is located in the light-shielding area 13 of the transparent substrate 1. The light-shielding part 2 includes at least two light-shielding layers 21. At least two light-shielding layers 21 are sequentially stacked in a direction perpendicular to the transparent substrate 1. In the transmissive area 14, along the direction away from the transparent substrate 1, the outer edges 201 of the light shielding layers 21 are sequentially retracted, and the outer edges 201 are edges close to the display area 11.

Specifically, as shown in FIG. 2, the above-mentioned “viewable area 12”, “display area 11”, “transmission area 14”, and “light-shielding area 13” distinguish the transparent substrate 1 according to the position of the area, and do not indicate the transparent substrate. This part of 1 has special functions. For example, in the present application, the "display area 11" of the transparent substrate 1 does not mean that this area of the transparent substrate 1 has a display function, but refers to the area of the transparent substrate 1 corresponding to the display area of the display module, and the display The display area of the module is stacked; specifically, the “stacking” mentioned in this application is only used to illustrate the positional relationship of each structure or each part, and the edges of each layer structure or each part that are “stacked” with each other are not necessarily aligned . In the same way, the “viewable area 12” refers to the part of the area surrounded by the display area 11 as viewed from the side of the transparent substrate 1 away from the light-shielding portion 2. The “viewable area 12” and the display area opening (AA Hole) corresponds to the position, which is specifically stacked with the display area opening (AA Hole) area of the display module; the'shading area 13' and the'transmission area 14' are two parts divided by the'viewing area 12', among which, the'shading area 13' 'Refers to the part of the area covered by the ring-shaped light-shielding portion 2 from the side of the transparent substrate 1 away from the light-shielding portion 2, specifically a ring shape, used to enclose and define the transmission area 14;'transmission area 14' refers to the light-shielded area The area surrounded by 13 is not covered by other structures on the transmission area 14 to allow light to pass through. For example, light can pass through the transmission area 14 to reach the inside of the display assembly, so that the photosensitive element inside the display assembly can obtain light signals.

Specifically, the light-shielding layer is a layer structure with a certain thickness. The “edge” involved in this application refers to the side of the layer structure for the layer structure of the light-shielding layer, and the “edge” involved in this application is Refers to the part adjacent to the'edge' of the layer structure.

In the cover plate provided by the embodiment of the present application, the light-shielding portion 2 includes multiple light-shielding layers 21, and the outer edges 201 of each light-shielding layer 21 are sequentially retracted. The difference in height of the surface) is very small, so, as shown in Figure 2, in the subsequent cover plate bonding process, the bonding glue (such as the optical adhesive layer 4) covers the outer edge of the shading part 2 and the shading part 2 The fitting effect of the outer edge is better, and it is not easy to produce bubbles. Moreover, since the thickness of each light-shielding layer 21 is small and there are fewer edge burrs, the thickness of the light-shielding portion 2 composed of multiple light-shielding layers 21 is easier to control, so that the manufacturing yield of the light-shielding portion 2 can be improved.

In summary, the light-shielding portion of the cover plate has a good yield, and when it is attached to the display module, it is not easy to produce bonding bubbles at the edge of the AA Hole, which can improve the yield of the display assembly.

As shown in FIG. 2, in some embodiments, the light shielding portion 2 may include 3 or 4 light shielding layers 21.

As shown in FIG. 2, in some embodiments, the projection pitch of the outer edges 201 of two adjacent layers of light shielding layer 21 on the transparent substrate 1 is 0.02mm-0.15mm; for example, it can be 0.02mm, 0.04mm, 0.06mm. , 0.08mm, 0.10mm, 0.12mm, 0.15mm, etc.

As shown in FIG. 2, in some embodiments, the thickness of each light shielding layer 21 may be 0.006mm-0.008mm; for example, it may be 0.006mm, 0.007mm, 0.008mm, etc. specifically.

As shown in Figure 2, in some embodiments, the inner diameter of the shading part 2 is 1.98mm-2.18mm, for example, it may be 1.98mm, 2.08mm, 2.18mm, etc.; the outer diameter of the shading part 2 is 3.46mm-3.66mm For example, it can be 3.46mm, 3.56mm, 3.66mm, etc. specifically. Specifically, the light shielding portion 2 has a ring shape, and the inner and outer diameters of the light shielding portion 2 are the inner and outer diameters of the ring.

Of course, the above settings for the inner and outer diameters of the light-shielding portion, the number of light-shielding layers, the thickness of each light-shielding layer, and the projection distance between the outer edges, etc., are only examples of the present application in some specific embodiments. In practical applications, It is not limited to the above numerical settings.

As shown in FIG. 2, in some embodiments, the inner edges 202 of the light shielding layers 21 are aligned, and the inner edges 202 are edges close to the transmission area 14. In the light-shielding portion 2, the inner edges 202 of the light-shielding layers 21 are aligned, which can ensure the contrast of the edges of the transmission area 14, avoid problems such as moiré on the photosensitive element using the transmission area 14 for lighting, and improve the image yield obtained by the photosensitive element.

As shown in FIG. 2, in some embodiments, the visible area 12 and the transmission area 14 are both circular areas to facilitate lighting and ensure the yield of the image obtained by the photosensitive element.

In some embodiments, the light shielding layer 21 may be an ink layer.

In some embodiments, the transparent substrate 1 is a glass substrate or a plastic substrate.

As shown in FIGS. 2 and 3, an embodiment of the present application further provides a display assembly, the display assembly includes any of the above-mentioned cover plates; and further includes:

The display module 3 is located on the side of the transparent substrate 1 where the light-shielding layer 21 is provided; the display module 3 is provided with a first hollow area 30 for exposing the transmission area 14, and the first hollow area 30 is the display area opening (AA Hole) .

As shown in Figures 2 and 3, in some embodiments, the display component provided in the embodiments of the present application further includes:

The optical adhesive layer 4 is located between the display module 3 and the transparent substrate 1; the optical adhesive layer 4 is provided with a second hollow area 40 for exposing the transmission area 14, and the optical adhesive layer 4 surrounds the edge of the second hollow area 40 to cover the shading The outer edge 201 of the layer 21.

Specifically, the optical adhesive layer 4 is used to bond the display module 3 and the transparent substrate 1, and the optical adhesive layer 4 is provided with a second hollow area 40 for exposing the transmission area 14. The light incident from the side of the cover plate can pass through. The second hollow area 40 of the optical adhesive layer 4 and the first hollow area 30 of the display module 3 reach the photosensitive element, so as to realize the function of acquiring an image, such as a camera function.

Specifically, the optical adhesive layer 4 covers the outer edge 201 of each light-shielding layer 21 around the edge of the second hollow area 40. Since the outer edge 201 of each light-shielding layer 21 shrinks in sequence, the step difference of each light-shielding layer 21 (two adjacent ones) The height difference of the step surface of the light shielding layer 21 is small. Therefore, the bonding effect of the optical adhesive layer 4 and the outer edge of each light shielding layer 21 is better, and air bubbles are not easily generated.

As shown in FIGS. 2 and 3, in some embodiments, the diameter of the second hollow area 40 is larger than the diameter of the first hollow area 30, that is, the edge of the optical adhesive layer 4 surrounding the second hollow area 40 surrounds the display module 3 The edges of the first hollowed-out area 30 shrink inward, so that the edge of the optical adhesive layer 4 can be prevented from exceeding the first hollowed-out area 30 during the lamination and extrusion process, so as to block the first hollowed-out area 30 and block the transmission area 14, thereby Ensure the yield rate of display components.

As shown in Figures 2 and 3, in some embodiments, there is a distance between the projection of the edge of the second hollow area 40 on the transparent substrate 1 and the projection of the inner edge 202 of the light shielding layer 21 on the transparent substrate 1, that is, optically The edge of the adhesive layer 4 surrounding the second hollow area 40 is retracted relative to the inner edge 202 of the light-shielding layer 21 surrounding the transmission area 14, so as to prevent the edge of the optical adhesive layer 4 from exceeding the inner edge of the light-shielding layer 21 during the lamination and extrusion process 202, so as to cover and block the transmissive area 14, so as to ensure the yield of the display assembly.

As shown in FIG. 3, in some embodiments, the diameter of the second hollow area 40 may be 2.75mm-3.05mm. For example, it can be 2.75mm, 2.80mm, 2.90mm, 3.00mm, 3.05mm, etc. specifically.

As shown in FIG. 3, in some embodiments, the thickness of the optical adhesive layer 4 is greater than the thickness of the light-shielding portion 2, so as to ensure that the edge of the optical adhesive layer 4 around the second hollow area 40 can better cover the light-shielding layers after the bonding process. The outer edge 201 of 21; Exemplarily, the thickness of the optical adhesive layer 4 may be 0.13 mm-0.17 mm. For example, it can be 0.13mm, 0.15mm, 0.17mm, etc. specifically.

In some embodiments, the material of the optical adhesive layer 4 is photosensitive optical adhesive.

As shown in FIG. 3, in some embodiments, the display component provided in the embodiments of the present application may further include:

The heat dissipation module 5 is located on the side of the display module 3 away from the transparent substrate 1; the heat dissipation module 5 is provided with a third hollow area 50 for exposing the transmissive area 14. The diameter of the third hollow area 50 is larger than that of the second hollow area 40 diameter of.

Specifically, the third hollow area 50 may be used to accommodate a photosensitive element, such as a camera.

Specifically, the heat dissipation module 5 may include a mesh adhesive layer, a foam layer, a polyimide film layer, and a metal film layer that are sequentially attached, wherein the mesh adhesive layer is attached to the display module 3.

As shown in FIG. 3, in some embodiments, the display module 3 may be an OLED display module. Further, the display assembly provided by the embodiment of the present application may further include a polarizer 6. The polarizer 6 is located between the display module 3 and the optical adhesive layer 4, and is provided with a fourth hollow area 60 for exposing the transmission area 14. The projection of the edge of the hollow area 60 on the transparent substrate 1 coincides with the projection of the edge of the first hollow area 30 on the transparent substrate 1.

As shown in FIG. 3, specifically, during the manufacturing process of the display assembly, the display module 3 and the polarizer 6 may be attached first, and then the first hollow area 30 and the fourth hollow area 60 are formed through a punching process; The display module 3 and the polarizer 6 are attached to the cover plate through optical glue, and finally the heat dissipation module 5 with the third hollow area 50 is attached to the side of the display module 3 away from the cover plate.

As shown in FIG. 3, in some embodiments, the first hollow area 30 of the display module 3, the second hollow area 40 of the optical adhesive layer 4, the third hollow area 50 of the heat dissipation module 5, and the fourth hollow area of the polarizer 6 The hollow areas 60 are layered on top of each other, and each of the above hollow areas is circular, and the axis lines can be overlapped.

In some embodiments, the display assembly provided in the embodiments of the present application further includes a photosensitive element, such as a camera module. Specifically, the photosensitive element is accommodated in each of the above-mentioned hollow areas. For example, the camera module may include a circular base and a photosensitive head. As shown in FIG. 3, the circular base (not shown in the figure) is accommodated in the heat dissipation mold. In the third hollow area 50 of the group 5, the photosensitive head (not shown in the figure) is accommodated in the first hollow area 30 and the fourth hollow area 60.

Specifically, the present application also provides a display device, which includes any of the above-mentioned display components.

Specifically, the display device can be applied to display devices with a display area opening (AA Hole) design, such as tablet computers and mobile phones.

In the display device provided by the embodiment of the present application, the cover plate and the AA Hole edge of the display module have a good bonding effect, are not easy to produce bonding bubbles, and the yield of the display device is high.

Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. In this way, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

A cover plate, including:

A transparent substrate having a visible area and a display area surrounding the visible area, the visible area including a transmission area and a light shielding area surrounding the transmission area;

The light-shielding portion is located in the light-shielding area of the transparent substrate, the light-shielding portion includes at least two light-shielding layers, the at least two light-shielding layers are sequentially stacked in a direction perpendicular to the transparent substrate, and each light-shielding layer surrounds in a ring shape In the transmissive area, in a direction away from the transparent substrate, the outer edges of each light shielding layer are sequentially retracted, and the outer edges are edges close to the display area.
3. The cover plate according to claim 1, wherein the projection distance of the outer edges of the two adjacent light-shielding layers on the transparent substrate is 0.02 mm-0.15 mm.
The cover plate according to claim 1, wherein the thickness of each light-shielding layer is 0.006mm-0.008mm.
The cover plate according to claim 1, wherein the light-shielding part includes 3 or 4 light-shielding layers.
8. The cover plate according to claim 1, wherein the inner edges of the light shielding layers are aligned, and the inner edges are edges close to the transmission area.
The cover plate according to any one of claims 1 to 5, wherein the inner diameter of the shading part is 1.98 mm-2.18 mm, and the outer diameter is 3.46 mm-3.66 mm.
The cover plate according to any one of claims 1 to 5, wherein the visible area and the transmission area are both circular areas.
5. The cover plate according to any one of claims 1 to 5, wherein the light shielding layer is an ink layer.
A display assembly, comprising the cover plate according to any one of claims 1-8; and further comprising:

The display module is located on the side of the transparent substrate where the light-shielding layer is provided; the display module is provided with a first hollow area for exposing the transmission area.
9. The display assembly of claim 9, further comprising:

The optical adhesive layer is located between the display module and the transparent substrate; the optical adhesive layer is provided with a second hollow area for exposing the transmission area, and the optical adhesive layer surrounds the second hollow area The edges cover the outer edges of each of the light shielding layers.
10. The display assembly of claim 10, wherein the diameter of the second hollowed-out area is greater than the diameter of the first hollowed-out area.
10. The display assembly of claim 10, wherein there is a distance between the projection of the edge of the second hollow area on the transparent substrate and the projection of the inner edge of the light shielding layer on the transparent substrate.
11. The display assembly of claim 10, wherein the diameter of the second hollow area is 2.75mm-3.05mm.
10. The display assembly of claim 10, wherein the thickness of the optical adhesive layer is 0.13 mm-0.17 mm.
11. The display assembly of claim 10, wherein the material of the optical adhesive layer is photosensitive optical adhesive.
The display assembly of claim 10, further comprising:

The heat dissipation module is located on the side of the display module away from the transparent substrate; the heat dissipation module is provided with a third hollow area for exposing the transmission area, and the diameter of the third hollow area is larger than the diameter of the third hollow area. The diameter of the second hollow area.
9. The display assembly of claim 10, wherein the display module is an OLED display module;

The display assembly further includes a polarizer, the polarizer is located between the display module and the optical adhesive layer, and is provided with a fourth hollow area for exposing the transmission area, and an edge of the fourth hollow area The projection on the transparent substrate coincides with the projection of the edge of the first hollow area on the transparent substrate.
A display device comprising the display assembly according to any one of claims 9-17.