CN216084142U

CN216084142U - Cover plate, display module and display device

Info

Publication number: CN216084142U
Application number: CN202122346367.7U
Authority: CN
Inventors: 龚伟; 魏向东; 杨皓天; 罗淼; 吴承龙; 沈家铭
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-03-18
Anticipated expiration: 2031-09-27

Abstract

The utility model provides a cover plate, a display module and a display device, relates to the technical field of display, and aims to solve the problem that when the cover plate is bonded with other structures included in a folding screen through a glue material in the existing cover plate structure, if the thickness of the glue material is thinner, bubbles are easily generated between the cover plate and the other structures, and the display effect of the folding screen is influenced. If the thickness of the glue material is thicker, the folding performance of the folding screen is easily influenced. The cover plate includes: the shading layer is positioned on the cover plate body; the segment difference compensation layer and the light shielding layer are arranged on the same layer, and the thickness of the segment difference compensation layer is smaller than or equal to that of the light shielding layer in the direction perpendicular to the cover plate body. The cover plate provided by the utility model is used for covering the display substrate to form a module structure.

Description

Cover plate, display module and display device

Technical Field

The utility model relates to the technical field of display, in particular to a cover plate, a display module and a display device.

Background

In recent years, the foldable screen has attracted attention because of its flexible and changeable display mode. In order to realize the folding function, the cover plate selected for the folding screen needs to have both flexibility and certain strength. The existing cover plate structure has the following problems: when the cover plate is bonded with other structures included by the folding screen through the glue material, if the thickness of the glue material is smaller, bubbles are easily generated between the cover plate and the other structures, and the display effect of the folding screen is influenced. If the thickness of the glue material is thicker, the folding performance of the folding screen is easily influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cover plate, a display module and a display device, which are used for solving the problem that when the cover plate is bonded with other structures included in a folding screen through a glue material in the existing cover plate structure, if the thickness of the glue material is thinner, bubbles are easily generated between the cover plate and the other structures, and the display effect of the folding screen is influenced. If the thickness of the glue material is thicker, the folding performance of the folding screen is easily influenced.

In order to achieve the above purpose, the utility model provides the following technical scheme:

the first aspect of the present invention provides a cover plate applied to a display module, the cover plate comprising:

a cover plate body;

the light shielding layer is positioned on the cover plate body;

the segment difference compensation layer and the light shielding layer are arranged on the same layer, and the thickness of the segment difference compensation layer is smaller than or equal to that of the light shielding layer in the direction perpendicular to the cover plate body; the orthographic projection of the level difference compensation layer on the cover plate body is at least partially overlapped with the cover plate body, and the level difference compensation layer is made of a material different from that of the light shielding layer.

Optionally, the light transmittance of the level difference compensation layer is greater than or equal to 90%, and the hardness of the level difference compensation layer is greater than or equal to 5H.

Optionally, the cover plate includes:

at least two cover plate bodies which are arranged in a stacked manner;

at least one glue layer, wherein the glue layer is positioned between the adjacent cover plate bodies;

the shading layer and the level difference compensation layer are located on the surface of one cover plate body.

Optionally, the cover plate includes:

two cover plate bodies which are arranged in a stacked manner;

the first adhesive layer is positioned between the two cover plate bodies;

the shading layer and the segment difference compensation layer are positioned on the surface, facing the first adhesive layer, of one cover plate body; or the shading layer and the segment difference compensation layer are positioned on the surface, back to the first adhesive layer, of one cover plate body.

Optionally, the cover plate includes:

the first cover plate body, the second cover plate body and the third cover plate body are arranged in a stacked mode;

the first glue layer is positioned between the first cover plate body and the second cover plate body;

the second glue layer is positioned between the second cover plate body and the third cover plate body;

the shading layer and the segment difference compensation layer are positioned on the surface, facing the first adhesive layer, of the first cover plate body; alternatively, the first and second electrodes may be,

the shading layer and the section difference compensation layer are positioned on the surface, back to the first adhesive layer, of the first cover plate body; alternatively, the first and second electrodes may be,

the shading layer and the segment difference compensation layer are positioned on the surface, facing the first adhesive layer, of the second cover plate body; alternatively, the first and second electrodes may be,

the shading layer and the segment difference compensation layer are positioned on the surface, facing the second adhesive layer, of the second cover plate body; alternatively, the first and second electrodes may be,

the light shielding layer and the section difference compensation layer are positioned on the surface, facing the second adhesive layer, of the third cover plate body; alternatively, the first and second electrodes may be,

the shading layer and the segment difference compensation layer are located on the surface, back to the second adhesive layer, of the third cover plate body.

Optionally, the cover plate further includes:

the hard layer is located the apron body, the apron includes whole the apron body all is located same one side of hard layer, hard layer with at least one has between the light shield layer the apron body.

Optionally, the level difference compensation layer and the hard layer are made of the same material.

Based on the technical scheme of the cover plate, the second aspect of the utility model provides a display module, which comprises the cover plate, and the display module further comprises a display substrate, wherein the display substrate is bonded with the cover plate through a bonding layer.

Optionally, the thickness d of the bonding layer satisfies: d is more than or equal to 25 mu m and less than or equal to 50 mu m.

Optionally, the light-shielding layer and the level difference compensation layer in the cover plate are located between the display substrate and the hard layer.

Optionally, the display substrate includes a display area and a peripheral area surrounding the display area;

at least part of the orthographic projection of the light shielding layer in the cover plate on the display substrate is located in the peripheral area, and at least part of the orthographic projection of the level difference compensation layer in the cover plate on the display substrate is located in the display area.

Optionally, the display area comprises a hole area and a hole peripheral area surrounding the hole area; the orthographic projection of part of the light shielding layer on the display substrate is located in the hole peripheral area, and the orthographic projection of part of the level difference compensation layer on the display substrate is located in the hole area.

Optionally, the display module further includes:

the supporting plate is positioned on one side, back to the cover plate, of the display substrate;

the optical film material is positioned between the cover plate and the display substrate.

Based on the above technical solution of the display module, a second aspect of the utility model provides a display device, which includes the above display module.

The cover plate is provided with the step difference compensation layer which is the same as the light shielding layer, so that the surface of the cover plate with the light shielding layer and the step difference compensation layer is flat, and the flatness of one side, facing the display substrate, of the cover plate is guaranteed when the cover plate is bonded with the display substrate.

Therefore, when the cover plate provided by the utility model is bonded with the display substrate through the bonding layer, the overlapping amount and high absorptivity of the bonding layer and the light shielding layer do not need to be considered, and even if the thickness of the bonding layer is small, bubbles are not formed on the bonding surface of the cover plate and the display substrate, so that the purposes of reducing the whole thickness of the cover plate and improving the bending performance are achieved.

Moreover, when the cover plate provided by the utility model is bonded with the display substrate through the bonding layer, the thickness of the bonding layer can be well compatible with the folding performance and the whole machine design.

In addition, when the cover plate provided by the utility model is bonded with the display substrate through the bonding layer, the frame width of the cover plate does not need to be increased, and the development trend of narrow frames is facilitated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic cross-sectional view of a cover plate in the related art;

fig. 2 is a rubber material for bonding a cover plate in the related art;

FIG. 3 is a schematic diagram illustrating the bonding of a cover plate to a plastic material according to the related art;

FIG. 4 is an enlarged schematic view of the structure of FIG. 3 encircled by a dashed line;

FIG. 5 is a schematic view of a display module according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a cover plate according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a cover plate according to an embodiment of the present invention;

FIG. 8 is a second cross-sectional view of a cover plate according to an embodiment of the present invention;

FIG. 9 is a third schematic cross-sectional view of a cover plate according to an embodiment of the present invention;

FIG. 10 is a fourth cross-sectional view of a cover plate according to an embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view of a cover plate according to an embodiment of the present invention;

FIG. 12 is a sixth cross-sectional view of a cover plate according to an embodiment of the present invention;

FIG. 13 is a seventh cross-sectional view of a cover plate according to an embodiment of the present invention;

fig. 14 is an eighth schematic cross-sectional view of a cover plate according to an embodiment of the utility model;

FIG. 15 is a schematic cross-sectional view of a ninth embodiment of a cover plate according to the present invention;

fig. 16 is a tenth cross-sectional view of the cover plate according to the embodiment of the present invention.

Detailed Description

In order to further explain the cover plate, the display module and the display device provided by the embodiment of the utility model, the following detailed description is made in conjunction with the accompanying drawings of the specification.

As shown in fig. 1 to 3, since the cover plate is provided with the ink layer (e.g., mark 20), the ink layer may have a step difference, which results in that the surface of the cover plate attached to the folding screen is uneven. When the cover plate is bonded with other structures included in the folding screen through the glue material 45, the part of the glue material 45 located in the overlapping area 44 is bonded with the ink layer, and the part of the glue material located in the filling area 43 is bonded with the periphery of the ink layer and is used for filling the step formed by the ink layer.

As shown in fig. 3 and 4, if the thickness of the glue material is small, the effect of filling the step difference with the glue material is poor, and air bubbles 46 are generated at the step difference position, which affects the display effect of the foldable screen. Folding screens have very stringent requirements for thickness, and any increase in thickness requires compromises in folding performance and overall design. If the thickness of setting up the glued material is thicker, then influence the folding performance and the complete machine design of folding screen easily.

In addition, if the contact area between the glue material and the ink layer is increased, the problem is overcome, the width of the frame of the cover plate needs to be increased, and the development trend of the narrow frame of the folding screen is back to the back.

Referring to fig. 5 and 7, an embodiment of the present invention provides a cover plate applied to a display module, where the cover plate includes: the light shielding layer 20 is positioned on the cover plate body 10; the level difference compensation layer 30 and the light shielding layer 20 are arranged on the same layer, and in the direction perpendicular to the cover plate body 10, the thickness of the level difference compensation layer 30 is smaller than or equal to that of the light shielding layer 20; an orthographic projection of the level difference compensation layer 30 on the cover plate body 10 at least partially overlaps with the cover plate body 10, and the level difference compensation layer 30 is made of a different material from the light shielding layer 20.

As shown in fig. 7, it is illustrated that the level difference compensation layer 30 has a thickness equal to that of the light-shielding layer 20.

As shown in fig. 16, it is illustrated that the level difference compensation layer 30 has a smaller thickness than the light-shielding layer 20. With this arrangement, the level difference compensation layer 30 can also compensate for the level difference generated by the light-shielding layer 20.

For example, the cover body 10 is made of colorless plastic resin material with flexible property, such as cpi (color polymer), PET, etc. Alternatively, a thinned glass structure such as UTG (ultra Thin glass) or the like may be used.

Illustratively, the light-shielding layer 20 includes an ink layer. When the cover plate is combined with the display substrate 60, the light shielding layer 20 is used for shielding the non-display area of the display substrate 60.

For example, the light shielding layer 20 and the level difference compensation layer 30 are both disposed on the same surface of the cover plate body 10, and in a direction perpendicular to the cover plate body 10, the thickness of the level difference compensation layer 30 is equal to the thickness of the light shielding layer 20, and the level difference compensation layer 30 can compensate for the level difference generated by the light shielding layer 20. Illustratively, the level difference compensation layer 30 is formed using a coating process.

For example, on the same surface of the cover plate body 10, the layout region of the light shielding layer 20 is complementary to the layout region of the level difference compensation layer 30. The layout region of the light-shielding layer 20 and the layout region of the level difference compensation layer 30 constitute the entire layout region of the surface.

As can be seen from the specific structure of the cover plate, in the cover plate provided in the embodiment of the present invention, the level difference compensation layer 30 is provided on the same layer as the light-shielding layer 20, and the surface of the cover plate on which the light-shielding layer 20 and the level difference compensation layer 30 are formed is made flat, so that when the cover plate is bonded to the display substrate 60, the flatness of the side of the cover plate facing the display substrate 60 is ensured.

Therefore, when the cover plate provided by the embodiment of the present invention is bonded to the display substrate 60 through the adhesive layer 42, it is not necessary to consider the overlapping amount and high absorptivity of the adhesive layer 42 and the light shielding layer 20, and bubbles are not formed on the bonding surface of the cover plate and the display substrate 60 even if the thickness of the adhesive layer 42 is small, so that the purpose of reducing the thickness of the entire cover plate and improving the bending performance is achieved.

Moreover, when the cover plate provided by the utility model is bonded with the display substrate 60 through the bonding layer 42, the thickness of the bonding layer 42 can be well compatible with the folding performance and the whole machine design.

In addition, when the cover plate provided by the embodiment of the utility model is bonded with the display substrate 60 through the bonding layer 42, the frame width of the cover plate does not need to be increased, which is beneficial to the development trend of narrow frames.

In some embodiments, the light transmittance of the level difference compensation layer 30 is greater than or equal to 90%, and the hardness of the level difference compensation layer 30 is greater than or equal to 5H.

The light transmittance of the segment difference compensation layer 30 is greater than or equal to 90%, the light extraction rate of the segment difference compensation layer 30 to the display module is reduced to the minimum, and the display quality of the display module is guaranteed.

The hardness of the segment difference compensation layer 30 is larger than or equal to 5H, so that the overall strength of the cover plate is improved, and the overall folding strength of the display module is well guaranteed.

As shown in fig. 8 to 10, in some embodiments, the cover plate includes:

at least two cover bodies (such as a first cover body 11 and a second cover body 12) arranged in a stacked manner;

at least one glue layer (e.g., first glue layer 40) between adjacent cover bodies;

the light shielding layer 20 and the level difference compensation layer 30 are located on the surface of one of the cover bodies.

Illustratively, the adjacent cover plate bodies are bonded through a glue layer.

For example, the at least two cover plate bodies may be made of the same material or different materials.

For example, the light shielding layer 20 and the level difference compensation layer 30 are located on a surface of one of the cover plate bodies 10, and the surface may be a surface facing the adhesive layer or a surface facing away from the adhesive layer.

Illustratively, the glue layer is Optical Clear Adhesive (OCA).

In the cover plate provided by the embodiment, the cover plate comprises at least two cover plate bodies and at least one layer of adhesive layer, so that the strength of the cover plate is further improved.

In the cover plate provided by the above embodiment, by arranging the light shielding layer 20 and the level difference compensation layer 30 on the surface of one of the cover plate bodies, the flatness of the side of the cover plate facing the display substrate 60 is ensured, bubbles are prevented from being generated on the bonding surface between the cover plate and the display substrate 60, and the folding performance and the overall design are well compatible.

As shown in fig. 8 to 10, in some embodiments, the cover plate includes:

two cover plate bodies which are arranged in a stacked manner;

the first glue layer 40 is positioned between the two cover plate bodies, and the first glue layer 40 is positioned between the two cover plate bodies;

the shading layer 20 and the level difference compensation layer 30 are located on the surface of one of the cover plate bodies facing the first glue layer 40; alternatively, the light shielding layer 20 and the level difference compensation layer 30 are located on a surface of one of the cover bodies, which faces away from the first adhesive layer 40.

Illustratively, the cover plate comprises a first cover plate body 11 and a second cover plate body 12 which are arranged in a stacked manner, and a glue layer located between the first cover plate body 11 and the second cover plate body 12.

For example, the light shielding layer 20 and the level difference compensation layer 30 are located on a surface of the first cover body 11 facing the first glue layer 40.

For example, the light shielding layer 20 and the level difference compensation layer 30 are located on a surface of the first cover body 11 opposite to the first glue layer 40.

For example, the light shielding layer 20 and the level difference compensation layer 30 are located on a surface of the second cover body 12 facing the first glue layer 40.

For example, the light shielding layer 20 and the level difference compensation layer 30 are located on a surface of the second cover body 12 opposite to the first adhesive layer 40.

Illustratively, the first cover body 11 is made of CPI or PET, the first glue layer 40 is made of OCA, and the second cover body 12 is made of CPI or UTG.

The cover plate comprises two cover plate bodies and the first glue layer 40 located between the two cover plate bodies, and the strength of the cover plate is further improved.

In the cover plate provided in the above embodiment, the light shielding layer 20 and the level difference compensation layer 30 are disposed on the surface of one of the cover plate bodies facing the first glue layer 40; or, the shading layer 20 and the level difference compensation layer 30 are located on the surface of one of the cover plate bodies, which is opposite to the first adhesive layer 40, so that the flatness of one side of the cover plate, which faces the display substrate 60, is ensured, bubbles are prevented from being generated on the bonding surface between the cover plate and the display substrate 60, and the folding performance and the whole machine design are well compatible.

As shown in fig. 11-15, in some embodiments, the cover plate includes:

a first cover body 11, a second cover body 12 and a third cover body 13 which are arranged in a stacked manner;

a first glue layer 40, wherein the first glue layer 40 is located between the first cover body 11 and the second cover body 12;

a second glue layer 41, wherein the second glue layer 41 is located between the second cover body 12 and the third cover body 13;

the light shielding layer 20 and the level difference compensation layer 30 are located on the surface of the first cover plate body 11 facing the first glue layer 40; alternatively, the first and second electrodes may be,

the light shielding layer 20 and the level difference compensation layer 30 are located on the surface of the first cover plate body 11 opposite to the first glue layer 40; alternatively, the first and second electrodes may be,

the shading layer 20 and the level difference compensation layer 30 are located on the surface of the second cover plate body 12 facing the first glue layer 40; alternatively, the first and second electrodes may be,

the light shielding layer 20 and the level difference compensation layer 30 are located on the surface of the second cover body 12 facing the second glue layer 41; alternatively, the first and second electrodes may be,

the light shielding layer 20 and the level difference compensation layer 30 are located on the surface of the third cover plate body 13 facing the second glue layer 41; alternatively, the first and second electrodes may be,

the light shielding layer 20 and the level difference compensation layer 30 are located on the surface of the third cover plate body 13 opposite to the second glue layer 41.

Illustratively, the first cover body 11 is CPI or PET, the second cover body 12 is UTG, and the third cover body 13 is PET.

For example, OCA is used for the first glue layer 40 and the second glue layer 41.

The cover plate comprises three cover plate bodies and a first glue layer 40 and a second glue layer 41 which are positioned between the cover plate bodies, and the strength of the cover plate is further improved.

In the cover plate provided in the above embodiment, the light shielding layer 20 and the level difference compensation layer 30 are disposed on the surface of one of the cover plate bodies facing the glue layer; or, the shading layer 20 and the segment difference compensation layer 30 are located on the surface of one of the cover plate bodies, which is opposite to the glue layer, so that the flatness of one side of the cover plate, which faces the display substrate 60, is ensured, bubbles are prevented from being generated on the bonding surface between the cover plate and the display substrate 60, and the folding performance and the whole machine design are well compatible.

As shown in fig. 7 to 15, in some embodiments, the cover plate further includes:

the hard layer 50 is located on the cover plate body, all the cover plate bodies included in the cover plate are located on the same side of the hard layer 50, and at least one cover plate body is arranged between the hard layer 50 and the shading layer 20.

For example, when the cover plate includes the first cover plate body 11, the second cover plate body 12 and the first glue layer 40, the hard layer 50 is located on a surface of the first cover plate body 11 facing away from the first glue layer 40, or the hard layer 50 is located on a surface of the second cover plate body 12 facing away from the first glue layer 40.

For example, when the cover plate includes the first cover plate body 11, the second cover plate body 12, the third cover plate body 13, the first glue layer 40 and the second glue layer 41, the second cover plate body 12 is located between the first cover plate body 11 and the second cover plate body 12, the hard layer 50 is located on a surface of the first cover plate body 11 facing away from the first glue layer 40, or the hard layer 50 is located on a surface of the third cover plate body 13 facing away from the second glue layer 41.

Illustratively, the light transmittance of the hard layer 50 is greater than or equal to 90%, and the hardness of the level difference compensation layer 30 is greater than or equal to 5H.

Illustratively, the level difference compensation layer 30 and the hard layer 50 are made of the same material.

Illustratively, the hard layer 50 covers the entire surface of the cover body.

For example, the hard layer 50 and the light shielding layer 20 are not located on the same surface of the same cover body.

In the cover plate provided in the above embodiment, the strength of the cover plate is further enhanced by providing the hard layer 50 on the cover plate body.

As shown in fig. 5, an embodiment of the present invention further provides a display module, which includes the cover plate provided in the foregoing embodiment, and the display module further includes a display substrate 60, where the display substrate 60 is bonded to the cover plate through a bonding layer 42.

Illustratively, the display substrate 60 includes an organic light emitting diode display substrate 60.

Illustratively, the adhesive layer 42 includes an OCA glue layer.

Illustratively, the display substrate 60 includes a base, and a driving circuit layer and a light emitting function layer disposed on the base. After the display substrate 60 is attached to the cover plate, the driving circuit layer and the light emitting function layer are both located between the substrate and the cover plate.

In the cover plate provided in the above embodiment, the level difference compensation layer 30 is provided on the same layer as the light-shielding layer 20, and the surface of the cover plate on which the light-shielding layer 20 and the level difference compensation layer 30 are formed is made flat, so that when the cover plate is bonded to the display substrate 60, the flatness of the cover plate on the side facing the display substrate 60 is ensured.

Therefore, in the display module according to the embodiment of the present invention, when the cover plate is bonded to the display substrate 60 through the adhesive layer 42, the overlapping amount and the high absorption of the adhesive layer 42 and the light shielding layer 20 do not need to be considered, and even if the thickness of the adhesive layer 42 is small, bubbles are not formed on the bonding surface of the cover plate and the display substrate 60, so that the purpose of reducing the overall thickness of the display module and improving the bending performance is achieved.

In addition, in the display module provided by the embodiment of the utility model, when the cover plate is bonded with the display substrate 60 through the bonding layer 42, the thickness of the bonding layer 42 can be well compatible with the folding performance and the whole design.

In addition, in the display module provided by the embodiment of the utility model, when the cover plate is bonded with the display substrate 60 through the bonding layer 42, the frame width of the cover plate and the frame of the display substrate 60 do not need to be increased, which is beneficial to the development trend of narrow frames.

As shown in fig. 5, in some embodiments, the thickness d of the adhesive layer 42 satisfies: d is more than or equal to 25 mu m and less than or equal to 50 mu m.

The thickness d of the bonding layer 42 is set to be not less than 25 μm and not more than 50 μm, so that the bending performance of the display module can be further improved while the bonding performance of the cover plate and the display substrate 60 is better ensured.

As shown in fig. 5, in some embodiments, the light-shielding layer 20 and the level difference compensation layer 30 disposed in the cover plate are located between the display substrate 60 and the hard layer 50.

For example, after the cover plate is attached to the display substrate 60, the hard layer 50 is located on a side of the cover plate opposite to the display substrate 60.

The bending performance of the display module can be better improved by the arrangement mode.

As shown in fig. 5, in some embodiments, the display substrate 60 includes a display area and a peripheral area (i.e., a non-display area) surrounding the display area;

at least part of the orthographic projection of the light shielding layer 20 in the cover plate on the display substrate 60 is located in the peripheral area, and at least part of the orthographic projection of the level difference compensation layer 30 in the cover plate on the display substrate 60 is located in the display area.

Illustratively, the orthographic projection of the light shielding layer 20 in the cover plate on the display substrate 60 covers the peripheral area, and the orthographic projection of the level difference compensation layer 30 in the cover plate on the display substrate 60 covers the display area.

For example, the light shielding layer 20 is used to shield the structure in the peripheral area of the display substrate 60, so as to ensure the display quality of the display substrate 60.

The light transmittance of the level difference compensation layer 30 is 90% or more, and does not affect the light output amount of the display region.

As shown in fig. 6, in some embodiments, the display area includes an aperture region and an aperture perimeter region surrounding the aperture region; part of the orthographic projection of the light shielding layer 20 on the display substrate 60 is located in the hole peripheral area, and part of the orthographic projection of the level difference compensation layer 30 on the display substrate 60 is located in the hole area.

Illustratively, the hole area is used for arranging a camera and the like. And a signal wire is arranged in the peripheral area of the hole. Part of the orthographic projection of the light shielding layer 20 on the display substrate 60 is located in the hole periphery area, and the hole periphery area can be shielded. The orthographic projection of part of the level difference compensation layer 30 on the display substrate 60 is positioned in the hole area, so that the normal use of the camera in the hole area is ensured.

As shown in fig. 5, in some embodiments, the display module further includes:

a support plate 90, wherein the support plate 90 is located on a side of the display substrate 60 facing away from the cover plate;

an optical film 70, wherein the optical film 70 is located between the cover plate and the display substrate 60.

Illustratively, the optical film 70 includes a polarizer.

Illustratively, the cover plate is bonded to the optical film 70 by OCA glue. The optical film material 70 is bonded to the display substrate 60 by OCA glue.

Illustratively, the display substrate 60 is bonded to the supporting plate 90 by a glue material.

Illustratively, the support plate 90 is disposed at a side of the display substrate 60 on which the base is seated.

The embodiment of the utility model also provides a display device which comprises the display module provided by the embodiment.

The display device may be: the display device comprises a television, a display, a digital photo frame, a mobile phone, a tablet personal computer and any other product or component with a display function, wherein the display device further comprises a flexible circuit board, a printed circuit board, a back plate and the like.

In the display module provided by the above embodiment, when the cover plate is bonded to the display substrate 60 through the bonding layer 42, the overlapping amount and high absorptivity of the bonding layer 42 and the light shielding layer 20 do not need to be considered, and even if the thickness of the bonding layer 42 is small, bubbles are not formed on the bonding surface of the cover plate and the display substrate 60, so that the purpose of reducing the whole thickness of the display module and improving the bending performance is achieved. Moreover, when the cover plate provided by the utility model is bonded with the display substrate 60 through the bonding layer 42, the thickness of the bonding layer 42 can be well compatible with the folding performance and the whole machine design. In addition, in the display module assembly provided by the above embodiment, when the cover plate is bonded to the display substrate 60 through the bonding layer 42, the frame width of the cover plate and the frame of the display substrate 60 do not need to be increased, which is beneficial to the development trend of narrow frames.

The display device provided by the embodiment of the utility model has the beneficial effects when comprising the display module, and the description is omitted.

It should be noted that "same layer" in the embodiments of the present invention may refer to a film layer on the same structural layer. Or, for example, the film layer on the same layer may be a layer structure formed by forming a film layer for forming a specific pattern by using the same film forming process and then patterning the film layer by using the same mask plate through a one-time patterning process. Depending on the specific pattern, one patterning process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous. These specific patterns may also be at different heights or have different thicknesses.

In the embodiments of the methods of the present invention, the sequence numbers of the steps are not used to limit the sequence of the steps, and for those skilled in the art, the sequence of the steps is not changed without creative efforts.

It should be noted that, in the present specification, all the embodiments are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the method embodiments, since they are substantially similar to the product embodiments, they are described simply, and reference may be made to the partial description of the product embodiments for relevant points.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected," "coupled," or "connected," and the like, are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides a cover plate, its characterized in that is applied to the display module assembly, the cover plate includes:

a cover plate body;

the light shielding layer is positioned on the cover plate body;

2. The sheathing according to claim 1, wherein the light transmittance of the level difference compensation layer is greater than or equal to 90%, and the hardness of the level difference compensation layer is greater than or equal to 5H.

3. The cover sheet according to claim 1, wherein the cover sheet comprises:

at least two cover plate bodies which are arranged in a stacked manner;

4. The cover sheet according to claim 3, wherein the cover sheet comprises:

two cover plate bodies which are arranged in a stacked manner;

the first adhesive layer is positioned between the two cover plate bodies;

5. The cover sheet according to claim 3, wherein the cover sheet comprises:

6. The cover sheet according to any one of claims 1 to 5, further comprising:

7. The cover sheet according to claim 6, wherein the level difference compensation layer and the hard layer are made of the same material.

8. A display module, comprising the cover plate as claimed in any one of claims 1 to 7, and further comprising a display substrate bonded to the cover plate via an adhesive layer.

9. The display module assembly according to claim 8, wherein the thickness d of the adhesive layer satisfies: d is more than or equal to 25 mu m and less than or equal to 50 mu m.

10. The display module of claim 8, wherein the light-shielding layer and the step compensation layer of the cover plate are disposed between the display substrate and the hard layer.

11. The display module of claim 8, wherein the display substrate comprises a display area and a peripheral area surrounding the display area;

12. The display module of claim 11, wherein the display area comprises an aperture region and an aperture perimeter region surrounding the aperture region; the orthographic projection of part of the light shielding layer on the display substrate is located in the hole peripheral area, and the orthographic projection of part of the level difference compensation layer on the display substrate is located in the hole area.

13. The display module assembly of claim 8, wherein the display module assembly further comprises:

14. A display device, comprising the display module according to any one of claims 8 to 13.