CN113641044A - Display panel and display device - Google Patents

Abstract

The application relates to the technical field of display, in particular to a display panel and a display device. The display panel includes: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate, the liquid crystal layer is arranged between the first substrate and the second substrate, a pixel electrode is arranged on the surface, close to the liquid crystal layer, of the first substrate, a spacer is arranged between the first substrate and the second substrate, the spacer is in contact with the pixel electrode, the spacer comprises a body and conductive materials dispersed in the body, and the conductive materials are in contact with each other after the body is extruded, so that the spacer is changed into a conductor from an insulator. The display panel can reduce the signal voltage of the stressed pressing part of the spacer, and avoid the rearrangement of liquid crystal molecules at the pressing part, thereby avoiding the phenomenon of uneven brightness of scratches and finally improving the product quality.

Description

Display panel and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a display panel and a display device.

Background

Trace Mura (indentation) is understood as a scratch uneven brightness phenomenon, which is a phenomenon that Mura (uneven brightness) appears on a display along a line of a scratching position after a surface of the display is scratched by a hard member without damaging a surface film layer, and the Mura cannot disappear in a short time. The principle of Trace Mura is that when the display panel is stressed, the liquid crystal molecules with large inclination angles at the stressed positions are extruded and rearranged to change the light transmittance, and after the stress is removed, the rearranged liquid crystal molecules can not return to the original positions in a short time under the action of an electric field, so that the display effect is influenced, and the product quality is finally influenced.

Disclosure of Invention

An object of the present application is to provide a display panel and a display device, which aim to solve the technical problem of how to reduce the Trace Mura phenomenon of the display panel.

In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:

in a first aspect, the present application provides a display panel comprising:

the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate, the liquid crystal layer is arranged between the first substrate and the second substrate, the first substrate is close to the surface of the liquid crystal layer and is provided with a pixel electrode, a spacer is arranged between the first substrate and the second substrate and is in contact with the pixel electrode, the spacer comprises a body and a conductive material dispersed in the body, and the conductive material is in contact with each other after the body is extruded, so that the spacer is changed into a conductor from an insulator.

In one embodiment, one end of the spacer abuts against the first substrate, and the other end of the spacer abuts against the second substrate.

In one embodiment, a contact portion of the spacer with the pixel electrode is provided with a conductive film.

In one embodiment, the contact portion of the spacer and the pixel electrode is provided with a conductive tip structure, and the tip of the tip structure faces the spacer.

In one embodiment, the volume fraction of the conductive material in the body is 10% to 40%.

In one embodiment, the spacer includes a first end portion contacting the pixel electrode and a second end portion not contacting the pixel electrode; wherein the volume fraction of the conductive material in the first end portion is 20% -60%, and the volume fraction of the conductive material in the second end portion is 5% -20%.

In one embodiment, the conductive material particle size in the first end portion is larger than the conductive material particle size in the second end portion.

In one embodiment, the conductive material is selected from at least one of metal nanoparticles and carbon nanomaterials.

In one embodiment, the metal nanoparticles are selected from at least one of gold nanoparticles, silver nanoparticles, copper nanoparticles, and aluminum nanoparticles;

and/or the carbon nanomaterial is selected from at least one of carbon nanotubes and graphene nanoplatelets.

According to the display panel, the conductive material is dispersed in the spacer between the first substrate and the second substrate, and the spacer is in contact with the pixel electrode on the first substrate; because the body of the spacer is a non-conductive organic material, the spacer is an insulator under the action of no external force, when the spacer is extruded under the action of the external force, the body is compressed, the conductive material parts are contacted with each other, so that the spacer is changed into a conductor from the insulator, and after the spacer is extruded and changed into the conductor, the signal of the pixel electrode at the pressed part is attenuated, thus the signal voltage at the pressed part can be reduced by utilizing Loading loss (Loading), the liquid crystal molecules at the pressed part are prevented from being rearranged, the phenomenon of Trace Mura can be avoided, and the product quality of the display panel is finally improved.

In a second aspect, the present application provides a display device comprising the display panel of the present application and a backlight module for providing illumination for the display panel.

The display device comprises a display panel, wherein a conductive material is dispersed in a spacer of a liquid crystal layer of the display panel, and the spacer is in contact with a pixel electrode on a first substrate; because the shock insulator is changed into a conductor after being compressed by the action of external force, the pixel electrode signal of the pressed part can be attenuated, so that the signal voltage of the pressed part is reduced by utilizing the Loading loss, the liquid crystal molecules of the pressed part are prevented from being rearranged, Trace Mura can be prevented from being generated, and the product quality of the display device can be finally improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present application;

FIG. 2 is a schematic view of the display panel shown in FIG. 1 after being pressed;

FIG. 3 is a schematic diagram of a pixel electrode voltage signal provided by an embodiment of the present application; wherein, a is a pixel electrode voltage signal before pressing, and b is a pixel electrode voltage signal after pressing;

fig. 4 is a schematic structural diagram of a display panel according to a second embodiment of the present application;

FIG. 5 is a schematic view of the display panel shown in FIG. 4 after being pressed;

fig. 6 is a schematic structural diagram of a display panel according to a third embodiment of the present application;

FIG. 7 is a schematic view of the display panel shown in FIG. 6 after being pressed;

fig. 8 is a schematic structural diagram of a display panel according to a fourth embodiment of the present application;

fig. 9 is a schematic structural view of a display device provided in a fifth embodiment of the present application;

wherein, in the figures, the respective reference numerals:

10-a first substrate, 11-a pixel electrode, 20-a second substrate, 30-a liquid crystal layer, 31-a spacer, 311-a body, 312-a conductive material, 313-a first end, 314-a second end, 32-a conductive film, 33-a tip structure, 301-liquid crystal molecules, 40-a backlight module.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the present application, "at least one" means one or more, "plural" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The first embodiment:

the present embodiment provides a display panel, as shown in fig. 1 and 2, including:

a first substrate 10;

a second substrate 20 disposed opposite to the first substrate 10;

a liquid crystal layer 30 between the first substrate 10 and the second substrate 20;

the surface of the first substrate 10 close to the liquid crystal layer 30 is provided with a pixel electrode 11, a spacer 31 is arranged between the first substrate 10 and the second substrate 20, the spacer 31 is in contact with the pixel electrode 11, the spacer 31 comprises a body 311 and a conductive material 312 dispersed in the body 311, and the conductive material 312 is in contact with each other after the body 311 is pressed, so that the spacer 31 is changed from an insulator to a conductor.

In the display panel provided in this embodiment, the conductive material 312 is dispersed in the spacer 31, and the spacer 31 contacts the pixel electrode 11 on the first substrate 10; because the body 311 of the spacer 31 is made of a non-conductive organic material, the spacer 31 is an insulator without an external force, as shown in fig. 1; when the spacer 31 is pressed by an external force, the body 311 is compressed, as shown in fig. 2, the conductive material 312 contacts with each other to change the spacer 31 from an insulator to a conductor, and the spacer 31 is pressed to be converted into a conductor, so that the signal of the pixel electrode 11 at the pressed portion is attenuated, and thus the signal voltage at the pressed portion can be reduced by using Loading loss (Loading), and the liquid crystal molecules 301 at the pressed portion are prevented from being rearranged, thereby avoiding the generation of Trace Mura, and finally improving the quality of the display panel product.

Specifically, the first substrate 10 may be an array substrate, and the second substrate 20 may be a color filter substrate. More specifically, the spacer 31 may be a main spacer, such that one end of the main spacer abuts against the first substrate 10 and the other end abuts against the second substrate 20, and the main spacer contacts with the pixel electrode 11 on the first substrate 10, so that the spacer 31 may have better response to an external force generating Mura, and at this time, the spacer 31 may be disposed on the first substrate 10 or the second substrate 20. Of course, the spacer 31 may be an auxiliary spacer, such that one end of the auxiliary spacer abuts against the first substrate 10 and the other end of the auxiliary spacer does not contact with the second substrate 20, and in this case, the spacer 31 is disposed on the first substrate 10.

Specifically, the body 311 of the Spacer (Spacer) 31 is a nonconductive organic material, and is generally selected from resin-based organic materials, for example, a resin selected from propylene-based resin, ethylene propylene elastic resin, polyester resin, and the like; more specifically, the Spacer 31 may be a Photo Spacer (PS).

The thickness of the spacer 31 (i.e., the height between the first substrate 10 and the second substrate 20) may be 2 μm to 6 μm, the shape of the spacer 31 may be circular, elliptical, truncated cone, or cylindrical, and the specific size is not limited, and may be, for example, 10 μm × 10 μm to 40 μm × 40 μm. Since the spacer 31 has a relatively thick thickness and a relatively large volume compared to the electrode layer, when the spacer 31 is compressed by extrusion and then converted into a conductor, the signal of the pixel electrode 11 at the pressed portion is attenuated, as shown in fig. 3, so that the actual voltage signal is reduced, thereby avoiding rearrangement of the liquid crystal molecules 301 at the pressed portion and generation of Trace Mura.

It should be noted that the term force or compression in this application refers generally to the external force that is currently capable of producing Mura, which corresponds to a threshold value. When the display panel is not influenced by external force or the external force is smaller than the threshold value, most of the conductive materials 312 dispersed in the spacer 31 in the display panel are separated from each other, and the spacer 31 is not conductive; when the external force is greater than or equal to the threshold value, the body 311 of the spacer 31 in the display panel of the present application is compressed, and at least parts of the originally dispersed conductive materials 312 are in contact with each other, so that the spacer 31 becomes a conductor, when the external force is removed again, the body 311 is restored, and the dispersed conductive materials 312 are separated from each other again to insulate the spacer 31.

Specifically, the conductive material 312 in the spacer 31 is selected from at least one of metal nanoparticles and carbon nanomaterials. Specifically, the metal nanoparticles are at least one selected from gold nanoparticles, silver nanoparticles, copper nanoparticles and aluminum nanoparticles, and the carbon nanomaterial is at least one selected from carbon nanotubes and graphene nanoplatelets. The metal nanoparticles and the carbon nanomaterial can be well dispersed in the body 311 of the spacer 31, and have good conductivity when contacting with each other. In one embodiment, the volume percentage of the conductive material 312 in the spacer 31 is 10% to 40% of the total volume of the body 311, that is, the total volume of the conductive material 312 is 10% to 40% of the total volume of the body 311, and under the above volume percentage condition, the conductive material 312 can be better contacted by the spacer 31 under pressure, so as to become a conductor.

The conductive material 312 is sized to be dispersed through the thickness of the spacer 31. For example, when the conductive material 312 is selected from metal nanoparticles, the particle size of the metal nanoparticles may be 100nm to 1000 nm; when the conductive material 312 is selected from a carbon nanotube or a graphene nanosheet, the size of the carbon nanotube can be 2nm × 100 nm-100 nm × 1 μm; the size of the graphene nano sheet can be 2nm multiplied by 200nm to 20nm multiplied by 1 mu m. The nanoscale material referred to in the present application may be a material having a size of 1nm to 1000 nm.

Second embodiment:

the present embodiment provides a display panel, as shown in fig. 4 and 5, including: a first substrate 10; a second substrate 20 disposed opposite to the first substrate 10; a liquid crystal layer 30 between the first substrate 10 and the second substrate 20; the surface of the first substrate 10 close to the liquid crystal layer 30 is provided with a pixel electrode 11, a spacer 31 is arranged between the first substrate 10 and the second substrate 20, one end of the spacer 31 is abutted against the first substrate 10, the other end of the spacer 31 is abutted against the second substrate 20, the spacer 31 is contacted with the pixel electrode 11, and a conductive film 32 is arranged at the contact part of the spacer 31 and the pixel electrode 11; the spacer 31 includes a body 311 and a conductive material 312 dispersed in the body 311, and the conductive material 312 is in contact with each other after the body 311 is pressed, so that the spacer 31 is changed from an insulator to a conductor.

Spacer the continuous conductive film 32 is a flat conductive film without gaps, and when the spacer 31 is pressed by an external force, the conductive materials 312 at least partially contact each other to change the spacer 31 from an insulator to a conductor, and the conductive film 32 can better increase the conductivity of the spacer 31 when contacting the pixel electrode 11. In addition, the optional schemes of the material, thickness, etc. of the body 311 and the conductive material 312 of the spacer 31 of the first embodiment can be used in the display panel shown in fig. 4, which has all the advantages of the spacer 31 provided by the first embodiment, and thus, the description thereof is omitted.

The third embodiment:

the present embodiment provides a display panel, as shown in fig. 6 and 7, including: a first substrate 10; a second substrate 20 disposed opposite to the first substrate 10; a liquid crystal layer 30 between the first substrate 10 and the second substrate 20; a pixel electrode 11 is arranged on the surface of the first substrate 10 close to the liquid crystal layer 30, a spacer 31 is arranged between the first substrate 10 and the second substrate 20, one end of the spacer 31 abuts against the first substrate 10, the other end abuts against the second substrate 20, the spacer 31 contacts with the pixel electrode 11, a conductive tip structure 33 is arranged at the contact part of the spacer 31 and the pixel electrode 11, and the tip of the tip structure 33 faces the spacer 31; the spacer 31 includes a body 311 and a conductive material 312 dispersed in the body 311, and the conductive material 312 is in contact with each other after the body 311 is pressed, so that the spacer 31 is changed from an insulator to a conductor.

The tip structure 33 may be a layer of conductive tip-like material, and is disposed between the spacer 31 and the pixel electrode 11, and the tip of the tip structure 33 faces the spacer 31. When the spacer 31 is pressed by an external force, the conductive materials 312 at least partially contact each other to change the spacer 31 from an insulator to a conductor, and the tip structures 33 can penetrate the surface of the adjacent spacer 31 to be in contact with the conductive materials 312 in the spacer 31, so as to further increase the conductivity of the spacer 31 and the pixel electrode 11. In addition, the optional schemes of the material, thickness, etc. of the body 311 and the conductive material 312 of the spacer 31 of the first embodiment can be used in the display panel shown in fig. 6, which has all the advantages of the spacer 31 provided by the first embodiment, and thus, the description thereof is omitted.

The fourth embodiment:

the present embodiment provides a display panel, as shown in fig. 8, including: a first substrate 10; a second substrate 20 disposed opposite to the first substrate 10; a liquid crystal layer 30 between the first substrate 10 and the second substrate 20; wherein, the surface of the first substrate 10 close to the liquid crystal layer 30 is provided with a pixel electrode 11, a spacer 31 is arranged between the first substrate 10 and the second substrate 20, one end of the spacer 31 is abutted with the first substrate 10, the other end is abutted with the second substrate 20, the spacer 31 is contacted with the pixel electrode 11, the spacer 31 comprises a body 311 and a conductive material 312 dispersed in the body 311, and the spacer 31 comprises a first end 313 contacted with the pixel electrode 11 and a second end not contacted with the pixel electrode 11; the volume percentage of the conductive material in the first end portion 313 is 20% -60%, and the volume percentage of the conductive material in the second end portion 314 is 5% -20%. For example, the spacer 31 may be divided into the first end portion 313 and the second end portion 314 having the same thickness, and since the volume distribution density of the conductive material in the first end portion 313 is greater than that of the conductive material in the second end portion 314, the conductivity of the spacer 31 contacting the pixel electrode 11 may be better increased when the spacer 31 is compressed by an external force.

Specifically, the particle size of the conductive material in the first end 313 of the spacer 31 is larger than the particle size of the conductive material in the second end 314. For example, taking metal nanoparticles as an example, the metal nanoparticles in the first end portion 313 may have a particle size of 500nm to 800nm, and the metal nanoparticles in the second end portion 314 may have a particle size of 100nm to 400 nm; thus, when the spacer 31 is pressed by an external force, the conductivity of the spacer 31 in contact with the pixel electrode 11 can be further increased.

Fifth embodiment:

the present embodiment provides a display device, as shown in fig. 9, the display device includes a display panel and a backlight module 40 for providing illumination for the display panel, specifically, the display panel includes: a first substrate 10; a second substrate 20 disposed opposite to the first substrate 10; the liquid crystal display panel comprises a liquid crystal layer 30 located between a first substrate 10 and a second substrate 20, wherein a pixel electrode 11 is arranged on the surface of the first substrate 10 close to the liquid crystal layer 30, a spacer 31 is arranged between the first substrate 10 and the second substrate 20, the spacer 31 is in contact with the pixel electrode 11, the spacer 31 comprises a body 311 and conductive materials 312 dispersed in the body 311, and the conductive materials 312 are in contact with each other after the body 311 is extruded, so that the spacer 31 is changed from an insulator to a conductor.

The display device provided by the embodiment includes a display panel specific to the embodiment of the present application, in which a conductive material 312 is dispersed in a spacer 31 of a liquid crystal layer 30 of the display panel, and the spacer 31 is in contact with a pixel electrode 11 on a first substrate 10; the spacer 31 is changed from an insulator into a conductor under the stress action, so that signals of the pixel electrode 11 at the stress part are attenuated, the signal voltage at the stress part is reduced by utilizing the Loading loss, the liquid crystal molecules at the pressing part are prevented from being rearranged, Trace Mura can be prevented from being generated, and the product quality of the display device can be improved finally.

Specifically, the display device provided in the embodiment of the present application may be provided with the display panels provided in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment, so that all options of the display panel may be used in the display device, and the display device has all advantages of the display panel provided in the embodiments, and is not described herein again.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate, the liquid crystal layer is arranged between the first substrate and the second substrate, the surface of the first substrate, which is close to the liquid crystal layer, is provided with a pixel electrode, and a spacer is arranged between the first substrate and the second substrate.

2. The display panel according to claim 1, wherein one end of the spacer abuts against the first substrate, and the other end of the spacer abuts against the second substrate.

3. The display panel according to claim 1, wherein a contact portion of the spacer with the pixel electrode is provided with a conductive film.

4. The display panel according to claim 1, wherein a contact portion of the spacer with the pixel electrode is provided with a conductive tip structure, a tip of the tip structure facing the spacer.

5. The display panel of claim 1, wherein the conductive material comprises 10% to 40% by volume of the body.

6. The display panel according to claim 4, wherein the spacer includes a first end portion in contact with the pixel electrode and a second end portion not in contact with the pixel electrode; wherein the volume percentage of the conductive material in the first end portion is 20% -60%, and the volume percentage of the conductive material in the second end portion is 5% -20%.

7. The display panel of claim 6, wherein the conductive material grain size in the first end portion is larger than the conductive material grain size in the second end portion.

8. The display panel according to any one of claims 1 to 7, wherein the conductive material is selected from at least one of metal nanoparticles and carbon nanomaterials.

9. The display panel according to claim 8, wherein the metal nanoparticles are selected from at least one of gold nanoparticles, silver nanoparticles, copper nanoparticles, and aluminum nanoparticles;

and/or the carbon nanomaterial is selected from at least one of carbon nanotubes and graphene nanoplatelets.

10. A display device comprising a display panel as claimed in any one of claims 1 to 9 and a backlight module for providing illumination to said display panel.

Images