CN214541382U

CN214541382U - Cover plate and display module

Info

Publication number: CN214541382U
Application number: CN202120550391.XU
Authority: CN
Inventors: 彭兆基; 张志丹
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-10-29
Anticipated expiration: 2031-03-17

Abstract

The utility model discloses an apron and display module assembly, apron are used for laminating display panel, and the apron includes: the device comprises a main body part and a bending part adjacently arranged on at least one side of the main body part; the bending part is provided with a first curved surface and a second curved surface which are oppositely arranged in the thickness direction, and the curvature of the second curved surface at least part of the bending part is smaller than that of the first curved surface. The utility model discloses can reduce the crooked bad that produces of panel, improve display module's yield.

Description

Cover plate and display module

Technical Field

The utility model relates to a show technical field, concretely relates to apron and display module assembly.

Background

In the information age, the display screen is more and more important as one of the most important carriers of information in the work and life of people. In recent years, in order to improve the visual experience of users, a waterfall screen with a large curvature and a full screen have become mainstream design schemes in the display field.

At present, the flexible screen is attached to the inner side of a curved cover plate by mainly utilizing the flexibility characteristic of the flexible screen to realize a full-screen; however, for a large-curvature display screen, the bending part of the flexible screen is easy to generate the problems of cracks, broken points, black lumps and the like, so that the yield of the display screen is low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an apron and display module assembly aims at improving the yield of big camber display screen.

In a first aspect, an embodiment of the present invention provides a cover plate for protecting a display panel, the cover plate includes: the bending part is provided with a first curved surface and a second curved surface which are oppositely arranged in the thickness direction, and the curvature of the second curved surface at least at part of the bending part is smaller than that of the first curved surface.

According to the present invention, the curvature of the second curved surface at any position on the bending portion is smaller than the curvature of the first curved surface.

According to any one of the preceding embodiments of the first aspect of the present invention, the bending portion includes a first sub-bending portion and a second sub-bending portion, the first sub-bending portion is connected between the second sub-bending portion and the main body portion, wherein the curvature of the second curved surface at any position on the first sub-bending portion is equal to the curvature of the first curved surface, and the curvature of the second curved surface at any position on the second sub-bending portion is smaller than the curvature of the first curved surface.

According to any one of the preceding embodiments of the first aspect of the present invention, the relative main body portion of the bending portion is bent toward the side where the second curved surface is located.

According to any of the preceding embodiments of the first aspect of the present invention, the thickness of at least part of the bending portion decreases gradually in a direction away from the main body portion.

According to any one of the embodiments of the first aspect of the present invention, the thickness of the bent portion gradually decreases in a direction away from the main body portion.

According to any of the preceding embodiments of the first aspect of the present invention, the main body has two preset edges that are arranged relatively in the preset direction, and each preset edge is connected with a bending portion, wherein the bending portion extends along the preset edge.

According to any of the preceding embodiments of the first aspect of the present invention, the bending portion is provided around the entire edge of the main body portion.

According to any one of the embodiments of the first aspect of the present invention, the main body is rectangular-like, the bending portion includes a first portion, a second portion and a third portion, the first portion is disposed on one side of the long side of the main body, the second portion is disposed on one side of the short side of the main body, and the third portion connects the first portion and the second portion; on the same dimension of the bending part, the curvature of the first part is larger than that of the second part, and the curvature of the third part is gradually reduced along the direction far away from the first part on the self extending direction, or on the same dimension of the bending part, the curvature of the first part is larger than or equal to that of the second part, and the curvature of the third part is gradually reduced and then gradually increased along the direction far away from the first part on the self extending direction.

In a second aspect, an embodiment of the present invention provides a display module, including: a flexible display panel having a light exit side; the cover plate according to any of the foregoing embodiments is disposed on the light exit side of the flexible display panel, and the second curved surface of the bending portion faces the flexible display panel.

According to the utility model discloses aforementioned embodiment of second aspect, the display module assembly still includes: the optics glue film sets up between apron and flexible display panel, and the optics glue film includes the edge glue layer portion that glues the layer portion and correspond with the kink with the main part that the main part corresponds, and the thickness of edge glue layer portion reduces gradually along keeping away from the direction that the main part glued the layer portion.

The embodiment of the utility model provides an apron and display module assembly, the apron includes main part and kink, the camber that sets up the second curved surface of at least partial position department on the kink of will lapping is for being less than the camber of first curved surface, during the preparation display screen, can laminate display panel in the second curved surface place side of kink, under the condition of guaranteeing the big camber visual effect of display module assembly outward appearance, can reduce the crooked degree of laminating at the flexible display panel of second curved surface corresponding position department, reduce the bad that the panel bending produced, and then can improve display module assembly's yield.

Drawings

Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.

Fig. 1 is a top view of a cover plate according to an embodiment of the present invention;

FIG. 2 shows a schematic cross-sectional view at A-A in FIG. 1;

fig. 3 is a schematic partial cross-sectional view of a cover plate according to another embodiment of the present invention;

fig. 4 shows a top view of a cover plate provided by a further embodiment of the present invention;

FIG. 5 shows a schematic cross-sectional view at B-B in FIG. 4;

fig. 6 is a top view of a cover plate according to still another embodiment of the present invention;

fig. 7 is a top view of a cover plate according to a further embodiment of the present invention;

fig. 8 is a schematic view illustrating a curvature change of a bent portion of a cover plate according to an embodiment of the present invention;

fig. 9 is a schematic view illustrating a curvature change of a bent portion of a cover plate according to another embodiment of the present invention;

fig. 10 is a schematic top view of a cover plate according to a further embodiment of the present invention;

fig. 11 is a schematic structural diagram of a display module according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a display module according to another embodiment of the present invention.

Description of reference numerals:

100-a cover plate; 110-a body portion; 120-bending part; 120 b-a first curved surface; 120 c-a second curved surface; 121-a first sub-bend; 122-a second sub-bend; 1201-a first part; 1202-a second portion; 1203-third portion;

200-an optical glue layer; 210-bulk glue layer portion; 220-edge glue layer part;

300-a flexible display panel;

l1 — first dimension; l2-second dimension; l3-third dimension.

Detailed Description

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

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

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

In recent years, in order to improve the visual experience of users, a waterfall screen with a large curvature and a full screen have become mainstream design schemes in the display field. At present, the flexible screen is attached to the inner side of the curved cover plate by mainly utilizing the flexible characteristic of the flexible screen to realize the full-face screen, but the larger the curvature of the display screen is, the higher the requirement on the bending of the flexible screen is, and for the large-curvature display screen, the problems of cracks, broken points, black clusters and the like are easily generated at the bending part of the flexible screen, so that the yield of the display screen is lower.

In order to solve the above problem, embodiments of the present invention provide a cover plate and a display module, and various embodiments of the cover plate and the display module will be described below with reference to the accompanying drawings.

An embodiment of the utility model provides an apron, this apron are used for laminating display panel. The Display panel may be an Organic Light Emitting Diode (OLED) Display panel or a Liquid Crystal Display (LCD) Display panel, which is not limited in this application.

An embodiment of the cover plate of the present application is described below with reference to fig. 1 and 2. Fig. 1 shows a top view of a cover plate provided by an embodiment of the present invention; fig. 2 shows a schematic cross-sectional view at a-a in fig. 1.

The boundary between the main body portion 110 and the bent portion 120 is shown in dotted lines in fig. 1 and 2, the dotted lines do not limit the structure of the cover plate 100, and the parts of the cover plate 100 may be integrally provided.

The embodiment of the present invention provides a cover plate 100, which includes a main body 110 and a bending part 120. The bending portion 120 is disposed adjacent to at least one side of the main body portion 110, the bending portion 120 has a first curved surface 120b and a second curved surface 120c disposed opposite to each other in the thickness direction, and the curvature of the second curved surface 120c at least a portion of the bending portion 120 is smaller than that of the first curved surface 120 b.

It is understood that the greater the curvature of the curved surface, the greater the degree of curvature of the curved surface, and the smaller the curvature, the less the degree of curvature of the curved surface.

According to the embodiment of the utility model provides a apron 100 sets up the camber of the second curved surface 120c of at least part position department on the kink 120 into the camber that is less than first curved surface 120b, during the preparation display screen, can laminate display panel in the second curved surface 120c place side of kink 120, can reduce the crooked degree of corresponding position department display panel, reduces the bad that the display panel is crooked to be produced.

Of course, when the cover plate 100 provided by the embodiment of the present invention is used to manufacture a display screen, the display panel can be attached to the side of the first curved surface 120b of the bending portion 120, which is also within the protection scope of the present invention.

In some optional embodiments, the curvature of the second curved surface 120c at any position on the bending portion 120 of the cover plate 100 may be smaller than the curvature of the first curved surface 120b, so as to achieve a large curvature of the first curved surface 120b of the bending portion 120 and a small curvature of the second curved surface 120c, when the display panel is attached to the side of the second curved surface 120c of the bending portion 120 to manufacture the display screen, the first curved surface 120b of the bending portion 120 is an appearance surface of the display screen, which can achieve a visual effect of large curvature on the appearance of the display screen, reduce the overall bending degree of the display panel, and reduce the defects caused by bending of the display panel, thereby improving the yield of the display screen with large curvature.

It is understood that the intersection line of the cross section of the bent portion 120 at any position and the second curved surface 120c is a curve, and in some alternative embodiments, the curvature of the intersection curve may increase first and then decrease along the direction away from the main body portion 110. Of course, the curvature at each position on the intersecting curves may be consistent, and the present application is not limited to this.

Because for the existing display screen, the display panel is usually attached to the concave side of the bending portion 120 of the cover plate 100, in some optional embodiments, the bending portion 120 of the cover plate 100 may be bent toward the side where the second curved surface 120c is located, so that the first curved surface 120b of the bending portion 120 is a convex curved surface, and the second curved surface 120c is a concave curved surface, when the display panel is attached to the concave side of the bending portion 120 to manufacture the display screen, the visual effect of large curvature of the display screen on appearance can be ensured, and the overall bending degree of the display panel can be reduced.

Of course, the bending portion 120 of the cover plate 100 may also be bent toward the side of the first curved surface 120b, so that the first curved surface 120b of the bending portion 120 is a concave curved surface, and the second curved surface 120c is a convex curved surface, and when manufacturing the display module, the display panel may be attached to the convex side of the bending portion 120 to reduce the bending degree of the display panel, which is also within the protection scope of the present application.

Fig. 3 is a schematic partial cross-sectional view of a cover plate according to another embodiment of the present invention. It can be understood that, the bending degree of the end of the bending portion 120 connected to the main body portion 110 is generally small, and the display panel is not prone to be bad when being attached to the position, so as to facilitate the manufacturing of the cover plate 100, as shown in fig. 3, the bending portion 120 of the cover plate 100 may include a first sub-bending portion 121 and a second sub-bending portion 122, the first sub-bending portion 121 is connected between the second sub-bending portion 122 and the main body portion 110, wherein the curvature of the second curved surface 120c at any position on the first sub-bending portion 121 may be equal to the curvature of the first curved surface 120b, and the curvature of the second curved surface 120c at any position on the second sub-bending portion 122 may be smaller than the curvature of the first curved surface 120 b.

The boundary between the first sub-bent portion 121 and the second sub-bent portion 122 is shown in a dotted line in fig. 3, the dotted line does not form a limitation to the structure of the bent portion 120, and each portion of the bent portion 120 may be integrally disposed.

In some optional embodiments, the thickness of at least a portion of the bent portion 120 of the cover plate 100 provided in the embodiments of the present invention may gradually decrease along a direction away from the main body portion 110; the reduction of the curvature of the second curved surface 120c of the portion on the bent portion 120 is achieved by gradually reducing the thickness, which is simple and convenient.

Alternatively, the thickness of the entire bending portion 120 gradually decreases in a direction away from the main body portion 110, that is, the thickness of the bending portion 120 at the end close to the main body portion 110 is larger, and the thickness at the end away from the main body portion 110 is smaller.

The thickness of each position on the main body portion 110 is generally the same, alternatively, the thickness of one end of the bending portion 120 close to the main body portion 110 may be the same as the thickness of the main body portion 110, and the thickness of one end of the bending portion 120 far from the main body portion 110 is smaller than the thickness of the main body portion 110.

In order to ensure the overall structural strength of the cover plate 100, in some alternative embodiments, the thickness of the end of the bent portion 120 away from the main body portion 110 is greater than or equal to 0.3 mm.

Optionally, the thickness of each position on the main body portion 110 and the bent portion 120 of the cover plate 100 is greater than or equal to 0.3 mm.

Fig. 4 shows a top view of a cover plate provided by a further embodiment of the present invention; FIG. 5 shows a schematic cross-sectional view at B-B in FIG. 4; fig. 6 is a top view of a cover plate according to still another embodiment of the present invention. In some optional embodiments, the cover plate 100 provided in the present invention may be a double-curved cover plate 100, the main body 110 may have two preset edges oppositely disposed in a preset direction, and each preset edge may be connected to a bent portion 120, where the bent portion 120 extends along the preset edge.

As shown in fig. 4 and 5, alternatively, the main body portion 110 may be rectangular, the preset direction may be a width direction of the main body portion 110, the two preset edges are two long sides of the main body portion 110, the two bent portions 120 are oppositely disposed in the width direction of the main body portion 110, and each bent portion 120 extends along a length direction of the main body portion 110.

As shown in fig. 6, the preset direction may also be the length direction of the main body 110, two preset edges are two short sides of the main body 110, two bending portions 120 are oppositely disposed in the length direction of the main body 110, and the bending portions 120 extend along the width direction of the main body 110, which is also within the protection scope of the present invention.

Alternatively, the bending portions 120 respectively connected to the two predetermined edges may be symmetrically disposed, so that the structure of the cover plate 100 is symmetrical, and the cover plate 100 has a good appearance. Of course, the bending degree and the extending length of the two bending portions 120 may also be different, and are also within the protection scope of the present invention.

The embodiment of the present invention provides a cover plate 100, the main body portion 110 has a first surface in the thickness direction, and the first surface and the second curved surface 120c of the bending portion 120 are located at the same side of the cover plate 100. The first surface of the main body 110 may be a plane or an arc surface, which is within the protection scope of the present invention.

Alternatively, when the cover plate 100 is a hyperbolic cover plate 100 and the first surface of the main body 110 is an arc surface, the bending direction of the first surface of the main body 110 may be consistent with the bending direction of the second curved surfaces 120c of the two bending portions 120.

Fig. 7 is a top view of a cover plate according to a further embodiment of the present invention; fig. 8 is a schematic view illustrating a curvature change of a bent portion of a cover plate according to an embodiment of the present invention; fig. 9 is a schematic view illustrating a curvature change of a bent portion of a cover plate according to another embodiment of the present invention; fig. 10 is a schematic top view of a cover plate according to still another embodiment of the present invention. In some alternative embodiments, the bending portion 120 may be disposed around the entire edge of the main body portion 110.

For convenience of understanding and explanation, an extending direction of an edge of the main body portion 110 may be defined as an extending direction of the bending portion 120, and a direction from the main body portion 110 to the bending portion 120 or from the bending portion 120 to the main body portion 110 may be defined as a width direction of the bending portion 120.

In some alternative embodiments, as shown in fig. 7, the main body 110 may be rectangular-like, and the two long sides, the two short sides, and the four corners of the main body 110 are connected with the bending portions 120, so that the cover 100 is a four-curved cover 100. The quasi-rectangular shape includes a rectangular shape, a rounded rectangular shape, a parallelogram shape, and the like, and the structure of the cover plate 100 will be described below by taking the main body 110 as a rounded rectangular shape as an example.

Referring to fig. 7, when the main body 110 is a rounded rectangle and the bending portion 120 is disposed around the entire edge of the main body 110, the bending portion 120 may include a first portion 1201, a second portion 1202 and a third portion 1203, the first portion 1201 is disposed on one side of the long side of the main body 110 and extends along the length direction of the main body 110, the second portion 1202 is disposed on one side of the short side of the main body 110 and extends along the width direction of the main body 110, the third portion 1203 is disposed on one side of the rounded edge of the main body 110, and the first portion 1201 is connected to the second portion 1202 through the third portion 1203.

It can be understood that, in the width direction of the bent portion 120, the bent portion 120 has different dimensions, as shown in fig. 7, for example, an inner edge of the bent portion 120 connected to the main body portion 110 is a first dimension L1, an outer edge of the bent portion 120 is a second dimension L2, and the bent portion 120 further has a third dimension L3 between the first dimension L1 and the second dimension L2.

Optionally, the curvatures at the positions of the first portion 1201 and the second portion 1202 are uniform in the same dimension of the bent portion 120.

Since the curved display screen on the existing market generally has a larger long side bending angle and a smaller short side bending angle, optionally, the curvature of the first portion 1201 is larger than that of the second portion 1202 in the same dimension of the bending portion 120.

To enable a smooth transition from the first portion 1201 to the second portion 1202, the third portion 1203 may be smoothly connected to the first portion 1201 and the second portion 1202. Alternatively, as shown in fig. 8, in the same dimension of the bent portion 120, the curvature of the third portion 1203 may gradually decrease in the direction away from the first portion 1201 in the self-extending direction (i.e., in the same dimension of the bent portion 120, the curvature of the third portion 1203 gradually increases in the direction away from the second portion 1202 in the self-extending direction), and the curvature of the position where the third portion 1203 is connected to the first portion 1201 may be consistent with the curvature of the first portion 1201, and the curvature of the position where the third portion 1203 is connected to the second portion 1202 may be consistent with the curvature of the second portion 1202.

It should be noted that, the first portion 1201, the second portion 1202, and the third portion 1203 each have a first curved surface 120b and a second curved surface 120c that are oppositely disposed in the thickness direction, "in the same dimension of the bent portion 120, the curvature of the first portion 1201 is greater than the curvature of the second portion 1202, and the curvature of the third portion 1203, in the extending direction thereof, may gradually decrease along the direction away from the first portion 1201," means that "in the same dimension of the bent portion 120, the curvature of the first curved surface 120b of the first portion 1201 is greater than the curvature of the first curved surface 120b of the second portion 1202, and the curvature of the first curved surface 120b of the third portion 1203, in the extending direction thereof, may gradually decrease along the direction away from the first portion 1201," and/or "in the same dimension of the bent portion 120, the curvature of the second curved surface 120c of the first portion 120c is greater than the curvature of the second curved surface 120c of the second portion 1202, the curvature of the second curved surface 120c of the third portion 1203 may gradually decrease in the direction away from the first portion 1201 in the direction in which it extends.

Alternatively, as shown in fig. 9, in the same dimension of the bending portion 120, the curvature of the third portion 1203 may also gradually decrease and then gradually increase along a direction away from the first portion 1201 in the self-extending direction (i.e., in the same dimension of the bending portion 120, the curvature of the third portion 1203 gradually decreases and then gradually increases along a direction away from the second portion 1202 in the self-extending direction). At this time, in the same dimension of the bending part 120, the curvature of the first portion 1201 may be larger than that of the second portion 1202, so that the long side bending angle of the curved display screen is larger and the short side bending angle is smaller. Of course, the curvature of the first portion 1201 may be less than or equal to the curvature of the second portion 1202, and is within the scope of the present invention.

It should be noted that "the curvature of the third portion 1203 in the same dimension of the bent portion 120 may gradually decrease and then gradually increase along the direction away from the first portion 1201 in the self-extending direction" means "the curvature of the first curved surface 120b of the third portion 1203 gradually decreases and then gradually increases along the direction away from the first portion 1201 in the self-extending direction", and/or "the curvature of the second curved surface 120c of the third portion 1203 in the same dimension of the bent portion 120 gradually decreases and then gradually increases along the direction away from the first portion 1201 in the self-extending direction".

Alternatively, the main body portion 110 of the cover plate 100 may be square-like, which is equivalent to the main body portion 110 being rectangular-like, the length of the long side and the short side of the rectangular-like are the same, and the bent portion 120 is connected to all four sides and four corners of the main body portion 110, in this case, the curvatures at the positions of the bent portion 120 may be uniform in the same dimension of the bent portion 120, that is, the curvatures of the first portion 1201, the second portion 1202, and the third portion 1203 of the bent portion 120 may be uniform.

In other alternative embodiments, as shown in fig. 10, the main body portion 110 of the cover plate 100 may have a circular shape, and the bent portion 120 has a circular ring shape.

Alternatively, the cover plate 100 having a circular or square-like top view may be applied to a display panel of a product or a component having a display function such as a wristwatch.

It is understood that the shape of the cover plate 100 and the main body 110 thereof is not limited to the above shape, and the main body 110 of the cover plate 100 may have other shapes such as an oval shape, a triangular shape, a rounded polygon shape, etc., and is also within the protection scope of the present application.

The material and the manufacturing method of the cover plate 100 are not particularly limited in the present application. When the cover plate 100 is manufactured, the main body 110 and the bent portion 120 may be integrally manufactured or may be separately manufactured, and the material of the main body 110 and the material of the bent portion 120 may be the same or may be different. The main body 110 and the bent portion 120 of the cover plate 100 may be integrally injection molded, and the cover plate 100 may be, for example, a glass cover plate 100 or a plastic cover plate 100, which are all within the scope of the present invention.

Additionally, the embodiment of the utility model provides a display module assembly is still provided. Fig. 11 is a schematic structural diagram of a display module according to an embodiment of the present invention.

As shown in fig. 11, the display module includes a flexible display panel 300 and the cover plate 100 as described above. The flexible display panel 300 has a light exit side, the cover plate 100 is disposed on the light exit side of the flexible display panel 300, and the second curved surface 120c of the bending portion 120 faces the flexible display panel 300. The flexible display panel 300 may be an Organic Light Emitting Diode (OLED) display panel.

According to the embodiment of the present invention, the curvature of the second curved surface 120c of the at least partial position of the bending part 120 is set to be smaller than the curvature of the first curved surface 120b, so that the degree of curvature of the flexible display panel 300 at the corresponding position of the second curved surface 120c of the bending part 120 is smaller, thereby reducing the defect of the flexible display panel 300, and further improving the yield of the display module.

Optionally, the flexible display panel 300 may include a main display portion and a curved display portion adjacently disposed on at least one side of the main display portion, wherein the main display portion is correspondingly attached to the main body portion 110, and the curved display portion is correspondingly attached to the bending portion 120.

Optionally, the curvature of the second curved surface 120c at any position on the bending portion 120 of the cover plate 100 may be smaller than the curvature of the first curved surface 120b, so as to achieve a large curvature of the first curved surface 120b of the bending portion 120 and a small curvature of the second curved surface 120c, which not only can ensure the visual effect of large curvature of the display module in appearance, but also can reduce the bending degree of the whole bent display portion of the flexible display panel 300, thereby improving the yield of the large-curvature display screen.

Fig. 12 is a schematic structural diagram of a display module according to another embodiment of the present invention. As shown in fig. 12, in some optional embodiments, the display module provided in the embodiments of the present invention may further include an optical adhesive layer 200, the optical adhesive layer 200 is disposed between the cover plate 100 and the flexible display panel 300, and the cover plate 100 and the flexible display panel 300 are bonded and attached through the optical adhesive layer 200.

The optical adhesive layer 200 may include a main body adhesive layer portion 210 and an edge adhesive layer portion 220 adjacently disposed on at least one side of the main body adhesive layer portion 210, wherein the main body adhesive layer portion 210 corresponds to the main body portion 110 of the cover plate 100 and is used for bonding the main display portion of the flexible display panel 300 and the main body portion 110 of the cover plate 100, and the edge adhesive layer portion 220 corresponds to the bent portion 120 of the cover plate 100 and is used for bonding the curved display portion of the flexible display panel 300 and the bent portion 120 of the cover plate 100.

Fig. 12 shows a boundary between the main glue layer portion 210 and the edge glue layer portion 220 by a dotted line, the dotted line does not limit the structure of the optical glue layer 200, and each portion of the optical glue layer 200 may be integrally disposed.

Alternatively, the thickness of the edge glue layer portion 220 may gradually decrease in a direction away from the main body glue layer portion 210. In this way, the curvature of the surface of the edge adhesive layer part 220 facing the flexible display panel 300 can be reduced, so that the bending degree of the flexible display panel 300 when being attached to the cover plate 100 is further reduced, and the yield of the large-curvature display screen is improved.

In accordance with the embodiments of the present invention as set forth above, these embodiments do not set forth all of the details nor limit the invention to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention and its various embodiments with various modifications as are suited to the particular use contemplated. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cover plate for attaching a display panel, the cover plate comprising:

the device comprises a main body part and a bending part adjacently arranged on at least one side of the main body part;

the bending part is provided with a first curved surface and a second curved surface which are oppositely arranged in the thickness direction, and the curvature of the second curved surface at least part of the bending part is smaller than that of the first curved surface.

2. The cover plate according to claim 1, wherein the curvature of the second curved surface at any position of the bent portion is smaller than the curvature of the first curved surface.

3. The cover plate according to claim 1, wherein the bending portion comprises a first sub-bending portion and a second sub-bending portion, the first sub-bending portion is connected between the second sub-bending portion and the main body portion, wherein a curvature of the second curved surface at any position of the first sub-bending portion is equal to a curvature of the first curved surface, and a curvature of the second curved surface at any position of the second sub-bending portion is smaller than a curvature of the first curved surface.

4. The cover plate according to claim 1, wherein the bent portion is bent toward the second curved surface side with respect to the main body portion.

5. The cover sheet according to claim 1, wherein the thickness of at least a portion of the bent portion gradually decreases in a direction away from the main body portion.

6. The cover plate according to claim 5, wherein the thickness of the bent portion is gradually reduced in a direction away from the main body portion.

7. The cover plate according to claim 1, wherein the main body portion has two predetermined edges oppositely disposed in a predetermined direction, and each of the predetermined edges is connected to one of the bent portions, wherein the bent portion extends along the predetermined edge.

8. The cover plate according to claim 1, wherein the bent portion is disposed around the entire edge of the main body portion.

9. The cover plate according to claim 8, wherein the main body portion is rectangular-like, the bent portion includes a first portion, a second portion and a third portion, the first portion is disposed on one side of a long side of the main body portion, the second portion is disposed on one side of a short side of the main body portion, and the third portion connects the first portion and the second portion;

in the same dimension of the bent portion, the curvature of the first portion is greater than that of the second portion, and the curvature of the third portion gradually decreases in the direction away from the first portion in the extending direction of the third portion, or in the same dimension of the bent portion, the curvature of the first portion is greater than or equal to that of the second portion, and the curvature of the third portion gradually decreases and then gradually increases in the direction away from the first portion in the extending direction of the third portion.

10. A display module, comprising:

a flexible display panel having a light exit side;

the cover plate according to any one of claims 1 to 9, disposed on the light exit side of the flexible display panel, wherein the second curved surface of the bending portion faces the flexible display panel.

11. The display module assembly of claim 10, wherein the display module assembly further comprises:

the optical adhesive layer is arranged between the cover plate and the flexible display panel and comprises a main body adhesive layer part corresponding to the main body part and an edge adhesive layer part corresponding to the bent part, and the thickness of the edge adhesive layer part is gradually reduced along the direction away from the main body adhesive layer part.