CN114709196B

CN114709196B - Display device and cover plate thereof

Info

Publication number: CN114709196B
Application number: CN202210282065.4A
Authority: CN
Inventors: 祝奇枫; 宛方
Original assignee: Wuhan Tianma Microelectronics Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2026-02-06
Anticipated expiration: 2042-03-22
Also published as: CN114709196A

Abstract

This application discloses a display device and its cover plate. The cover plate is used for a display panel and includes: a transparent substrate having a first surface and a second surface facing each other, the second surface being for facing the display surface of the display panel; and an electrostatic discharge layer located on the first surface, the impedance of the electrostatic discharge layer in a first direction being less than the impedance in a second direction; wherein the first direction is parallel to the first surface, and the second direction is perpendicular to the first surface. This application enables the cover plate to release static electricity laterally when it has static electricity on the side near the first surface, by transmitting the static electricity from the central area of the cover plate to the surrounding edge areas in a direction parallel to the first surface. This prevents the static electricity from being transmitted towards the display panel in a direction perpendicular to the first surface, thereby avoiding the generation of induced charges in the display panel and thus avoiding display defects caused by this.

Description

Display device and cover plate thereof

Technical Field

The application relates to the technical field of display devices, in particular to a display device and a cover plate thereof.

Background

Along with the continuous progress of scientific technology, more and more display devices are widely applied to the daily life of people and work, so that great convenience is brought to the daily life and work of people, and the display devices become an indispensable important tool for people at present.

At present, a display device generally adopts a touch display panel, and can respond to touch operation of a user while realizing an image display function so as to facilitate touch detection. When touch operation is performed, static electricity is formed on the surface of the display device, electromagnetic interference can be generated by the static electricity, and image display quality is affected.

Therefore, how to integrate an effective antistatic structure in a display device is a problem to be solved in the technical field of display devices.

Disclosure of Invention

In view of this, the present application provides a display device and a cover plate thereof, and the scheme is as follows:

a cover plate for a display panel, the cover plate comprising:

A transparent substrate having opposite first and second surfaces, the second surface for facing a display surface of the display panel;

An electrostatic discharge layer located on the first surface, the electrostatic discharge layer having a smaller impedance in the first direction than in the second direction;

wherein the first direction is parallel to the first surface and the second direction is perpendicular to the first surface.

The technical scheme of the application also provides a display device, which comprises:

A display panel;

the cover plate is arranged on the display surface of the display panel.

As can be seen from the foregoing description, in the display device and the cover plate thereof provided by the technical solution of the present application, the electrostatic discharge layer is disposed on the first surface of the cover plate far from the display surface of the display panel, and the impedance of the electrostatic discharge layer in the first direction is smaller than the impedance in the second direction, so that the conductivity of the electrostatic discharge layer has anisotropy, and the conductivity in the first direction is stronger than the conductivity in the second direction, so that when the cover plate has static electricity on one side close to the first surface, the static electricity can be transferred from the middle area of the cover plate to the peripheral edge area in the direction parallel to the first surface, so as to realize the lateral discharge of the static electricity, and avoid the static electricity from being transferred in the direction perpendicular to the first surface toward the display panel, thereby avoiding the induced charges in the display panel and further avoiding the poor display caused thereby.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings required for the description of the embodiments or the prior art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the provided drawings without inventive effort to those skilled in the art.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the application, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the application, without affecting the effect or achievement of the objective.

FIG. 1 is a schematic diagram of a display device with anti-static function;

fig. 2 is a schematic structural diagram of a cover plate according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of an electrostatic discharge layer according to an embodiment of the present application;

fig. 4 is a schematic diagram of different distribution states of conductive particles in an electrostatic discharge layer according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another electrostatic discharge layer according to an embodiment of the present application;

fig. 6 is a schematic structural view of another cover plate according to the embodiment of the present application, which is based on the above embodiment;

FIG. 7 is a schematic structural view of a cover plate according to another embodiment of the present application;

fig. 8 is a schematic structural view of a cover plate according to another embodiment of the present application, which is based on the above embodiment;

fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which it is shown, however, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

When a user performs a touch operation on the display device, static electricity is generated on the surface of the display device. If the display device has no effective static electricity leading-out path, when static electricity changes outside the display device, induced charges are generated in the display panel due to static electricity induction, and the induced charges can interfere display control signals transmitted by signal lines in the display panel, so that display unevenness, stripes and other display bad problems are caused. Taking an OLED display device as an example, since the OLED light emitting element is sensitive to static electricity, induced charges caused by the static electricity may cause the OLED light emitting element to shift electrically, so that a problem of lighting stealing occurs when the OLED light emitting element is not required to be lighted, and when the OLED light emitting element is required to be lighted, problems of uneven display, stripes and the like occur due to uneven brightness and color shift caused by the electric shift.

To prevent electrostatic interference, a conventional implementation is shown in fig. 1.

Referring to fig. 1, fig. 1 is a schematic structural view of a display device having an antistatic function, the display device including:

A display panel 11 having a first surface and a second surface disposed opposite to each other, wherein the first surface is a display surface of the display panel 11;

the cover plate 12 is arranged on the first surface, and the cover plate 12 is adhered and fixed on the first surface of the display panel 11 through the optical adhesive 13;

The back support structure 14 provided on the second surface, the back support structure 14 including a plurality of functional layers sequentially stacked in a direction perpendicular to the display panel 11 (i.e., a vertical direction of fig. 1). In the manner shown in fig. 1, the back support structure 14 includes at least a prosthetic tape 141, foam 142, and a metal layer 143 stacked in this order in a direction in which the first surface of the display panel 11 is directed to the second surface, and the metal layer 143 may be a Cu layer.

If the display panel is an OLED panel, the first surface of the display panel 11 may be provided with a polarizer 15 in order to reduce the reflectivity of the display panel to external ambient light. Wherein, the cover plate 12 is adhered and fixed on one side of the polarizer 15, which is away from the display panel 11, through the optical adhesive 13.

The conductive layer in the display panel 11 is electrically connected to the metal layer 143 in the back support structure 14 through the flexible circuit board 16, specifically, one end of the flexible circuit board 16 is connected to the conductive layer in the display panel 11, and the other end is bent to the back of the display device, and is connected to the metal layer 143 in the back support structure 14 through the conductive cloth 17.

The anti-static operation principle of the display device shown in fig. 1 is that when static electricity 151 is generated by touch operation or other factors, induced charges 152 are generated in the conductive layer of the display panel 11 due to static electricity induction, and the induced charges 152 are conducted to the metal layer 143 of the back support structure 14 through the flexible circuit board 16 and the conductive cloth 17 for release.

Taking the display panel 11 as an OLED display panel as an example, although the display device shown in fig. 1 can achieve an antistatic effect to a certain extent, test results show that when static electricity with a large amount of electricity is generated by friction of a copper bar, the electric charge is easily transferred downwards into the display panel, and the problems of lighting, uneven display, stripes and the like of the OLED light-emitting elements in the display panel still exist due to the static electricity. This is because, when the static electricity 151 with a large electric quantity is generated on the surface of the cover plate 11, the display device shown in fig. 1 can release the induced charges 152, but the static electricity 151 on the surface of the cover plate 11 has no guiding path, and the static electricity 151 on the outer surface of the cover plate 11 cannot be released in time, and there is still a certain electromagnetic interference in the display panel 11.

In the embodiment of the present application, the display device is an OLED display device. Obviously, in the embodiment of the application, the display device is not limited to be an OLED display device, but may be other types of display devices, such as an LCD display device, an electronic paper display device, an LED display device, a micro LED display device, and the like, which all generate a poor display problem when being subjected to electrostatic interference. In the embodiment of the present application, the type of the display device is not particularly limited.

In view of this, an embodiment of the present application provides a display device and a cover plate thereof, where in the technical solution of the present application, an electrostatic discharge layer is disposed on a first surface of the cover plate away from a display surface of a display panel, and impedance of the electrostatic discharge layer in a first direction is smaller than impedance in a second direction, so that conductivity of the electrostatic discharge layer has anisotropy, and conductivity in the first direction is stronger than conductivity in the second direction, so that when static electricity is disposed on a side of the cover plate near the first surface, the static electricity can be transferred from a middle area of the cover plate to peripheral edge areas in a direction parallel to the first surface, so as to achieve lateral discharge of the static electricity, and avoid transfer of the static electricity in a direction perpendicular to the first surface toward the display panel, thereby avoiding induction charges generated in the display panel, and avoiding poor display caused thereby.

In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a cover plate according to an embodiment of the present application, where the cover plate is used for a display panel, and as shown in fig. 2, the cover plate includes:

a transparent substrate 21 having a first surface S1 and a second surface S2 opposite to each other, the second surface S2 being for facing a display surface of the display panel;

an electrostatic discharge layer 22 located on the first surface S1, the electrostatic discharge layer 22 having a smaller impedance in the first direction X than in the second direction Y;

wherein the first direction X is parallel to the first surface S1, and the second direction Y is perpendicular to the first surface S1.

In the cover plate provided by the embodiment of the application, the electrostatic discharge layer 22 is arranged on the first surface S1 of the cover plate far away from the display surface of the display panel, and the impedance of the electrostatic discharge layer 22 in the first direction X is smaller than the impedance in the second direction Y, so that the conductivity of the electrostatic discharge layer 22 has anisotropy, and the conductivity in the first direction X is stronger than the conductivity in the second direction Y, so that when the cover plate has static electricity on one side close to the first surface S1, the static electricity can be transferred from the middle area of the cover plate to the peripheral edge area in the direction parallel to the first surface S1, thereby realizing the transverse discharge of the static electricity, avoiding the transfer of the static electricity in the direction perpendicular to the first surface towards the display panel, and avoiding the generation of induced charges in the display panel, thereby avoiding the poor display problem caused by the induced charges.

In addition, in the technical scheme of the embodiment of the application, static electricity can be transferred from the middle area of the cover plate to the peripheral edge area in the direction parallel to the first surface S1, so that static electricity is prevented from accumulating in the middle area of the cover plate, induced charges caused by the static electricity to the display panel below are avoided, and the problem of poor display caused by the static electricity is avoided.

The transparent substrate 21 may be a glass substrate, a transparent plastic plate or a plate made of other transparent insulating materials, and the material of the transparent substrate 21 may be selected according to the requirements according to the embodiment of the present application, and the material of the transparent substrate 21 is not particularly limited.

As can be seen from the above description, in the cover plate provided by the embodiment of the present application, the impedance of the static electricity release layer 22 in the first direction X is smaller than the impedance in the second direction Y, so that the plane direction resistance of the cover plate can be reduced, the vertical direction resistance of the cover plate can be increased, when static electricity is generated on the friction surface of the cover plate, the static electricity in the horizontal direction can be reduced, and the static electricity is prevented from being transferred to the display panel below the cover plate through the cover plate, thereby solving the problem of poor display caused by static electricity, avoiding the interference of static electricity on the display panel, and improving the antistatic performance of the display device.

Experimental results show that compared with the mode shown in FIG. 1, when the copper bar rubs the display device to enable a large amount of static electricity to be generated on the surface of the display device, the display device adopting the cover plate provided by the embodiment of the application has the advantages that the anti-static performance is remarkably improved, and the problem of poor display caused by static electricity can be effectively prevented.

Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of an electrostatic discharge layer according to an embodiment of the present application, and fig. 4 is a schematic diagram of different distribution states of conductive particles in an electrostatic discharge layer according to an embodiment of the present application, in which the electrostatic discharge layer 22 includes:

A conductive mesh 31 provided on the first surface, the conductive mesh 31 having a plurality of mesh cells 311;

Conductive particles 32 located within the grid cells 311;

Wherein the distribution states of the plurality of conductive particles 32 in the same grid cell 311 are different when there is static electricity and no static electricity. Specifically, fig. 4 is a schematic diagram of different distribution states of conductive particles in an electrostatic discharge layer according to an embodiment of the present application, as shown in the left diagram of fig. 4, conductive particles 32 are discretely distributed in a grid unit 311 in a non-electrostatic state, and as shown in the right diagram of fig. 4, conductive particles 32 are collected in the grid unit 311 based on electrostatic force in a static state.

When the touch operation is performed, the finger rubs against the surface of the cover plate, and the friction force causes static electricity, and the static electricity discharge layer 22 deforms to collect the conductive particles 32. The reason why the static electricity discharge layer 22 deforms to cause the conductive particles 32 to gather is that the space in the grid cells 311 has a compression deformation component in the lateral direction in the sliding direction if it is sliding friction on the surface of the cover plate, so that the interval between the conductive particles 32 in the grid cells 311 becomes small, and the gathering is generated, and if it is pressing friction on the surface of the cover plate, the static electricity discharge layer 22 is depressed downward by vertically pressing the cover plate, and the horizontal component of the depression tends to pull the interval between the conductive particles 32, and the gathering is generated.

The minimum spacing between adjacent conductive particles 32 is different due to static electricity and non-static electricity, and the resistance of the static discharge layer 22 in the first direction X is related to the minimum distance, the smaller the resistance, and conversely, the larger the resistance. The conductive particles 32 are discretely distributed in the grid cells 311 in a non-electrostatic state, the minimum distance between adjacent conductive particles 32 is L1, the conductive particles 32 are gathered in the grid cells 311 based on electrostatic force in the electrostatic state, the minimum distance between adjacent conductive particles 32 is L2, L2 is less than L1, and L2 is greater than or equal to 0. Because L2 is smaller than L1, when there is static electricity, the static electricity discharge layer 22 has a smaller resistance in the first direction X, so that static electricity is transferred from the middle to the edge in the plane of the static electricity discharge layer 22, and static electricity is prevented from accumulating on the cover plate.

The display device has a display area and a bezel area surrounding the display area. According to the embodiment of the application, the static electricity on the cover plate can be transferred from the middle to the edge, so that the static electricity is conducted from the display area to the frame area, and the interference of the static electricity on the image display effect of pixels in the display area is avoided.

The shape of the grid cells 311 in the conductive grid 31 may be polygonal, circular, elliptical, or the like.

Referring to fig. 5, fig. 5 is a schematic structural diagram of another electrostatic discharge layer according to an embodiment of the present application, and in the electrostatic discharge layer shown in fig. 5, a conductive mesh 31 includes a graphene film. The mode is based on a grid structure of a unique two-dimensional honeycomb form of a two-dimensional graphene material, 6 carbon atoms 312 form an equal hexagonal structure on a two-dimensional plane in a surrounding mode, and the mode is directly based on an inherent grid structure of the two-dimensional graphene material without preparing a grid pattern by a separate process. And the graphene material has good conductivity on a two-dimensional plane, and the conductivity is 455S/cm.

The conductive mesh 31 may be provided to include at least one layer of graphene film. Optionally, in an embodiment of the present application, the conductive mesh 31 includes a graphene film. When a graphene film is used as the conductive grid 31, by matching with the conductive particles 32, the electrostatic discharge layer 22 can realize a good electrostatic discharge function in the first direction, and the resistance in the second direction is relatively large compared with the resistance in the first direction, so that static electricity is prevented from being conducted downwards into the display panel. Obviously, in other ways, the conductive mesh 31 may also be provided to include a plurality of graphene films.

In the embodiment of the application, when the graphene film is adopted as the conductive grid 31, the thickness of the graphene film is set to be 10nm-20nm, and in the thickness range, the integrity of the two-dimensional honeycomb lattice structure of the graphene film is ensured while the thickness of the graphene film is thinner, and the graphene film has higher light transmittance and has the visible light transmittance of more than 85%.

In the embodiment of the present application, the conductive particles 32 are metal particles with a particle size not exceeding 10nm, for example, the particle size of the conductive particles 32 may be 1nm, 3nm, or 4 nm. The conductive particles 32 are nano-sized metal particles, so that the antistatic performance of the display device is improved, and the influence of the excessive particles on the luminous display effect of the display panel can be avoided.

The conductive particles 32 may be provided mixed in an elastic gum base material, with the elastic gum base material between the conductive particles 32 when there is no static electricity, and the static electricity causes the conductive particles 32 to converge and elastically compress the elastic gum base material between the conductive particles 32 when there is static electricity. When the static electricity is removed, the conductive particles 32 are restored to the original dispersed state by the restoring force of the elastic deformation of the colloidal substrate.

Referring to fig. 6, fig. 6 is a schematic structural diagram of another cover plate according to the embodiment of the present application, and based on the above embodiment, in the manner shown in fig. 6, the electrostatic discharge layer 22 includes a metal mesh layer 41 and an anisotropic conductive adhesive layer 42 stacked in the second direction X. In this way, the metal mesh layer 41 with a desired pattern structure may be formed by etching a metal layer, the mesh pattern structure may be set based on the requirement, and the metal mesh layer 41 in the electrostatic discharge layer 22 may have various designs, not limited to the lattice structure of molecules.

The metal mesh has good conductivity, and can better gather and transmit the anisotropic conductive adhesive layer 42 to generate transverse current due to static electricity so as to quickly conduct the static electricity from the display area to the frame area of the display device.

In the manner shown in fig. 6, the metal mesh layer 41 is located on the first surface S1, and the anisotropic conductive adhesive layer 42 is located on a side of the metal mesh layer 41 facing away from the first surface S1, and fills the mesh structure of the metal mesh layer 41. In this way, the metal mesh layer 41 with the required pattern structure is formed on the first surface S1, then the anisotropic conductive adhesive layer 42 is formed above the metal mesh layer 41, so that better surface flatness can be achieved through the anisotropic conductive adhesive layer 42, and meanwhile, the metal mesh layer 41 can be better attached to the first surface S1 through the anisotropic conductive adhesive layer 42, so that attachment stability and reliability between film layers are ensured.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a cover plate according to another embodiment of the present application, which is different from the manner shown in fig. 6 in that, in the manner shown in fig. 7, the anisotropic conductive adhesive layer 42 is located on the first surface S1, and the metal mesh layer 41 is located on the side of the anisotropic conductive adhesive layer 42 facing away from the first surface S1. In this way, the metal mesh layer 41 is closer to the touch surface of the cover plate, so that static electricity can be more quickly collected, and the static electricity can be more quickly conducted from the display area to the frame area of the display device.

In the manner shown in fig. 7, in order to secure flatness of the outer side surface of the cover plate, a planarization layer may be provided which further includes a cover metal mesh layer 41. The planarization layer may be a multi-layer insulating protective layer in the following embodiments.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a cover plate according to another embodiment of the present application, and based on the above embodiment, the cover plate shown in fig. 8 further includes an insulation protection layer 23, where the insulation protection layer 23 is located on a side of the static electricity discharge layer 22 facing away from the first surface S1. Wherein the insulating protection layer 23 is at least used for preventing the electrostatic discharge layer 22 from being worn out due to touch operation. Further, an insulating protective layer 23 can be further provided as an anti-fingerprint film for weakening and decomposing the visibility of fingerprint grease in touch operation, so as to play a role in preventing fingerprints.

In the manner shown in fig. 8, only the manner shown in fig. 1 is used for schematic illustration, and it is obvious that the insulating protective layer 23 may be provided in the cover plate according to any of the foregoing manners, and the description of the embodiment of the present application is not repeated.

In the embodiment of the application, the cover plate is used for the display device, and because the embodiment of the application can enable the static electricity on the cover plate to be transferred from the middle to the edge, the static electricity is conducted from the display area to the frame area, and the static electricity is prevented from being accumulated above the display area, thereby avoiding the bad influence of the static electricity on the display effect. In addition, compared with the mode shown in fig. 1, even if the cover plate provided by the embodiment of the application does not have a conductive path for transmitting static electricity to the metal layer on the back surface of the display device, the negative influence of the static electricity on the display effect can be effectively avoided because the static electricity is transmitted to the frame area far away from the display area.

Based on the above embodiment, another embodiment of the present application further provides a display device, where the knight-errant device is shown in fig. 9.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present application, where the display device includes:

A display panel 51;

the cover plate 52 according to any one of the above embodiments, the cover plate 52 is provided on the display surface of the display surface 51.

In the embodiment of the application, the display device comprises, but is not limited to, electronic equipment with a display function, such as a mobile phone, a tablet personal computer, intelligent wearable equipment and the like.

When the finger 53 of the user touches the cover plate 52, static electricity 54 is generated at the touch position, and the static electricity on the cover 52 is transferred from the middle to the edge by the cover plate 52 according to the above embodiment, so that the static electricity 54 is far away from the display panel 51 in the first direction X, and adverse effects on the display effect of the display panel 51 are avoided.

Because the embodiment of the application can transfer the static electricity of the cover plate 52 from the middle to the edge, the static electricity is conducted from the display area to the frame area, and the static electricity is prevented from being accumulated above the display area, thereby avoiding the bad influence of the static electricity on the display effect. In addition, compared with the mode shown in fig. 1, as shown in fig. 8, the display device can not have a conductive path for transmitting static electricity to the metal layer on the back of the display device, and the bad influence of the static electricity on the display effect can be effectively avoided because the static electricity is transmitted to the frame area far away from the display area.

In the embodiment of the present application, the cover plate 52 may be a flat plate cover plate, and has a first area and a second area surrounding the first area, where the first area is opposite to the display area of the display device, and the second area is opposite to the frame area of the display device. At this time, in the second direction Y, there is no overlapping portion between the second region and the display panel 51, and the static electricity 54 is conducted to the edge of the second region, so even if the static electricity 54 cannot be timely discharged at the edge of the cover plate 52, the influence on the display panel is small, even no.

In addition, at least part of the static electricity 54 can be consumed in the transverse transmission process, and after the static electricity 54 is transmitted away from the area of the display panel 51, the interference of the static electricity 54 on the display panel is further reduced, so that a conductive path of the static electricity transmitted to a metal layer on the back of the display device becomes unnecessary to design, and the static electricity 54 on the edge of the cover plate 52 can be naturally released by contacting other objects in the use process of a user.

In other embodiments, the cover 52 may be a curved cover. The edge portion of the cover plate 52 is bent toward one side of the display panel 51, thereby realizing a narrow bezel or even a full-screen design without a bezel. The static electricity 54 can be conducted to the frame area far away from the display area in the mode so as to be far away from the display panel 51, and adverse effects of the static electricity on the display effect can be effectively avoided.

In other implementations, the side of the display panel 51 facing away from the display surface has a metal member, and the static electricity protection layer of the cover plate 52 is connected with the metal member to form a static electricity discharge path, so as to avoid the static electricity 54 from accumulating at the edge of the cover plate 52.

In the embodiment of the application, the cover plate 52 may be adhered and fixed to the display panel 51 by optical cement. If the display panel 51 is an OLED display panel, the display side of the display panel may also be provided with a polarizer in order to reduce reflection of ambient light. The cover plate 52 is attached and fixed to one side of the polarizer, which faces away from the display panel 51. The back support structure is provided on a side of the display panel 51 facing away from the display surface, and comprises a plurality of functional layers stacked in sequence in a direction in which the cover plate 52 is directed toward the display panel 51, and at least comprises a prosthetic tape, foam and a metal layer, which may be a Cu layer, stacked in sequence in this direction. At this time, the film structure of the display device may be as shown with reference to fig. 1.

In the present specification, each embodiment is described in a progressive manner, or a parallel manner, or a combination of progressive and parallel manners, and each embodiment is mainly described as a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

It should be noted that in the description of the present application, it is to be understood that the drawings and descriptions of the embodiments are illustrative and not restrictive. Like diagramming marks throughout the embodiments of the specification identify like structures. In addition, the drawings may exaggerate the thicknesses of some layers, films, panels, regions, etc. for understanding and ease of description. It will also be understood that when an element such as a layer, film, region or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present. In addition, "on" means positioning an element on or under another element, but not essentially on the upper side of the other element according to the direction of gravity.

The terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

It is further noted that relational terms such as first and second, and the like are 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. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an 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 article or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of additional like elements in an article or apparatus that comprises such an element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

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

an electrostatic discharge layer on the first surface, the electrostatic discharge layer having a smaller impedance in a first direction than in a second direction;

Wherein the first direction is parallel to the first surface and the second direction is perpendicular to the first surface;

The electrostatic discharge layer comprises a conductive grid arranged on the first surface, wherein the conductive grid is provided with a plurality of grid cells, conductive particles positioned in the grid cells, the conductive particles are discretely distributed in the grid cells in a static-free state, and the conductive particles are gathered in the grid cells based on electrostatic force in the static-free state;

Or the electrostatic discharge layer comprises a metal grid layer and an anisotropic conductive adhesive layer which are laminated in the second direction.

2. The cover sheet of claim 1 wherein the conductive mesh comprises a graphene film.

3. The cover sheet of claim 2, wherein the graphene film has a thickness of 10nm to 20nm.

4. The cover sheet of claim 1, wherein the conductive particles are metal particles having a particle size of not more than 10nm.

5. The cover plate of claim 1, wherein the metal mesh layer is located on the first surface, the anisotropic conductive adhesive layer is located on a side of the metal mesh layer facing away from the first surface, and fills the mesh structure of the metal mesh layer.

6. The cover plate of claim 1, wherein the anisotropic conductive adhesive layer is located on the first surface, and the metal mesh layer is located on a side of the anisotropic conductive adhesive layer facing away from the first surface.

7. The cover sheet of any one of claims 1-6 further comprising an insulation shield layer on a side of the static discharge layer facing away from the first surface.

8. A display device, comprising:

A display panel;

The cover sheet according to any one of claims 1 to 7, wherein the cover sheet is provided on a display surface of the display panel.

9. The display device of claim 8, wherein a side of the display panel facing away from the display surface has a metal member, and the electrostatic protection layer of the cover plate is connected to the metal member.