CN116679475B - Cover plate, manufacturing method thereof, display module and display device - Google Patents

Abstract

The application discloses a cover plate, a preparation method thereof, a display module and a display device, wherein the cover plate is applied to the display module, the display module comprises a display panel, the cover plate is arranged on the light emitting side of the display panel, a light adjusting material is doped in the edge area of the cover plate, and the transmittance of the light adjusting material is smaller than that of the main body material of the cover plate.

Description

Cover plate and preparation method thereof, display module and display device

Technical Field

The present application relates to the field of display technology, and in particular to a cover plate and a preparation method thereof, a display module and a display device.

Background Art

At present, as display modules are widely used in terminal smart products, consumers have higher and higher performance requirements for display modules in all aspects. For example, the demand for appearance is becoming more and more exquisite. At the same time, manufacturers are also paying more and more attention to improving product quality and reducing production costs.

In display modules, 2D or 2.5D cover glasses (CG for short) are usually selected. However, 2D and 2.5D cover glasses generally have the problem of light leakage, that is, after the display module is started/lit up in a dark place, the edge of the cover glass, which should have no light leakage, has light emission. The light leakage problem of the cover glass is not easy to detect during the preparation process of the cover glass, resulting in that after the cover glass is used to make the display module, the light leakage can only be discovered when the display module is started/lit up, resulting in a low preparation yield of the display module, which in turn greatly increases the preparation cost of the display module. If display modules with light leakage problems flow into the market, it will seriously affect consumers' user experience and damage the brand image.

Summary of the invention

The embodiments of the present application provide a cover plate and a method for preparing the same, a display module and a display device, which can improve the light leakage problem existing when the cover plate is applied to the display module.

According to a first aspect of an embodiment of the present application, a cover plate is provided for use in a display module, wherein the display module includes a display panel, and the cover plate is arranged on a light-emitting side of the display panel, wherein an edge area of the cover plate is doped with a dimming material, and the transmittance of the dimming material is less than the transmittance of a main material of the cover plate.

In some embodiments, the dimming material is distributed in an island-like suspension in an edge region of the cover plate, and the density of the dimming material decreases in a direction away from the edge region of the cover plate.

In some embodiments, the dimming material has a doping range of 10 μm to 30 μm in a direction away from the edge region of the cover plate.

In some embodiments, the dimming material is rare earth silicate microcrystals.

A second aspect of the embodiments of the present application provides a method for preparing a cover plate, comprising:

providing a cover substrate;

The edge region of the cover plate substrate is doped with dimming material to prepare a cover plate.

According to a third aspect of an embodiment of the present application, a display module is provided, comprising:

Display panel;

A cover plate, disposed on the light-emitting side of the display panel, and an edge area of the cover plate protrudes from the display panel;

The edge region of the cover plate is doped with dimming material, and the transmittance of the dimming material is lower than the transmittance of the main body material of the cover plate.

In some embodiments, the cover plate includes a light incident surface and a light emitting surface that are oppositely disposed, and a side wall located between the light incident surface and the light emitting surface, and the doped dimming material is distributed on the side wall and/or one side of the side wall.

In some embodiments, the display module further includes a shading plate, which is disposed on a side of the cover plate close to the display panel, and the shading plate is disposed opposite to a non-display area of the display panel.

In some embodiments, the display module also includes a middle frame, which is arranged around a multi-layer structure formed by the cover plate, the shading plate and the display panel, and a groove is provided on the inner wall of the middle frame, the notch of the groove faces the edge area of the cover plate, and the groove is adapted to the structure of the cover plate protruding from the edge area of the display panel.

In some embodiments, the display module also includes a polarizing plate and an optical adhesive layer, and the polarizing plate and the optical adhesive layer are arranged between the display panel and the cover plate, the polarizing plate is arranged close to the light emitting side of the display panel, the optical adhesive layer is arranged close to the cover plate, and the orthographic projection of the optical adhesive layer on the cover plate covers a portion of the shading plate.

According to a fourth aspect of the embodiments of the present application, a display device is provided, comprising the display module.

The cover plate provided in the embodiment of the present application is doped with the dimming material in the edge area of the cover plate. On the one hand, the presence of the dimming material makes the transmittance of the edge area doped with the dimming material significantly lower than that of other areas of the cover plate that are not doped with the dimming material. When the light entering the cover plate passes through the edge area doped with the dimming material, a part of the light flux will be lost due to the lower transmittance of the edge area doped with the dimming material, so that the light leakage phenomenon existing when the cover plate is applied to the display module is improved. On the other hand, the dimming material in the edge area doped with the dimming material will form multiple scattering centers, so that the light entering the edge area of the cover plate is easily scattered in the edge area doped with the dimming material, which can also effectively improve the problem of edge light leakage when the cover plate is applied to the display module.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic cross-sectional structural diagram of a 2D cover plate in the prior art provided by the present application;

FIG2 is a schematic cross-sectional structural diagram of a 2.5D cover plate in the prior art provided by the present application;

FIG3 is a schematic optical path diagram of light leakage from a 2D cover plate in the prior art provided by the present application;

FIG4 is a schematic optical path diagram of light leakage from a 2.5D cover plate in the prior art provided by the present application;

FIG5 is a schematic cross-sectional structural diagram of a cover plate provided in an embodiment of the present application;

FIG6 is a schematic cross-sectional structural diagram of another cover plate provided in an embodiment of the present application;

FIG. 7 is a schematic cross-sectional structural diagram of a display module provided in an embodiment of the present application.

DETAILED DESCRIPTION

In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

In the prior art, when 2D and 2.5D cover plates are applied to display modules, there is a light leakage problem at the edges and corners of the 2D and 2.5D cover plates, that is, after starting/lighting up the display module in the dark, there is a light emission phenomenon at the edge of the cover plate that should have no light leakage. Specifically, please refer to the contents shown in Figures 1 and 2, wherein Figure 1 is a schematic cross-sectional structure diagram of a 2D cover plate in the prior art, and Figure 2 is a schematic cross-sectional structure diagram of a 2.5D cover plate in the prior art. As shown in Figures 1 or 2, the cover plate includes a light incident surface 100 close to one side of the display panel and a light incident surface 101 close to the display panel. The light-emitting surface 200 is arranged corresponding to the light-entering surface 100, and the side wall 300 is arranged between the light-entering surface 100 and the light-emitting surface 200 and is used to connect the light-entering surface 100 and the light-emitting surface 200. The side wall includes a first side wall 310 and a second side wall 320, wherein the first side wall 310 and the second side wall 320 are flat surfaces after rough grinding and fine polishing. When light is incident on the light-entering surface 100 of the cover plate, a variety of different light leakage paths are formed in the edge area of the cover plate. For example, FIG. 3 is a schematic light path diagram of the light leakage of the 2D cover plate, and FIG. 3 shows the light Two different light leakage paths are formed in the edge area of the 2D cover plate, wherein light A is reflected on the second side wall 320 and then emitted to the first side wall 310, and then reflected on the first side wall 310 and then emitted to the light exit surface 200 of the cover plate, that is, the path of light A constitutes one light leakage path, and another light B is reflected on the light exit surface 200 of the cover plate and then emitted to the second side wall 320, and then reflected on the second side wall 320 and then emitted to the light exit surface 200 of the cover plate, that is, the path of light B constitutes another light leakage path; illustratively, FIG4 is a light leakage path of the 2.5D cover plate FIG4 is a schematic optical path diagram of a line, wherein two different light leakage paths formed by light in the edge area of the 2.5D cover plate are shown, wherein light C is reflected on the second side wall 320 and then emitted to the first side wall 310, and then reflected on the first side wall 310 and then emitted to the light emitting surface 200 of the cover plate, that is, the path of light C constitutes one light leakage path, and another light D is reflected on the light emitting surface 200 of the cover plate and then emitted to the second side wall 320, and then reflected on the second side wall 320 and then emitted to the light emitting surface 200 of the cover plate, that is, the path of light D constitutes another light leakage path.

In order to solve the problem of light leakage at the edge of the cover plate in the aforementioned display module, the embodiments of the present application provide a cover plate and a preparation method thereof, a display module and a display device, which are used to improve the light leakage problem when the cover plate is applied to a display substrate.

According to a first aspect of an embodiment of the present application, a cover plate is provided for use in a display module, wherein the display module includes a display panel, and the cover plate is arranged on the light-emitting side of the display panel, wherein an edge area of the cover plate is doped with a dimming material, and the transmittance of the dimming material is less than the transmittance of a main material of the cover plate.

Specifically, in the present embodiment, by doping the edge area of the cover plate with dimming material, on the one hand, the presence of the dimming material makes the transmittance of the edge area doped with the dimming material significantly lower than that of other areas of the cover plate that are not doped. When the light entering the cover plate passes through the edge area doped with the dimming material, a part of the luminous flux will be lost due to the lower transmittance of the edge area doped with the dimming material. On the other hand, the dimming material in the edge area doped with the dimming material will form a plurality of scattering centers, so that the light entering the edge area of the cover plate is easily scattered on the surface of the dimming material, resulting in a reduction in the light emitted along the light leakage path as shown in FIG. 3 or 4, thereby effectively improving the problem of edge light leakage when the cover plate is applied to the display module.

Furthermore, the cover plate includes a light incident surface and a light emitting surface that are arranged opposite to each other, and a side wall arranged between the light incident surface and the light emitting surface, and the doped dimming material is distributed on the side wall and/or one side of the side wall.

In this embodiment, considering that when the cover plate is applied to the display module, light leakage generally occurs at the corners or edges of the cover plate, therefore, by distributing the doped dimming material on the side wall and/or one side of the side wall, when the cover plate is applied to the display module, the light leakage problem at the corners and edges of the cover plate can be improved specifically when the cover plate is applied to the display module.

Among them, when dimming material is distributed on the side wall, the side wall is a non-smooth surface containing the dimming material. It can be understood that due to the presence of the dimming material, the side wall has an uneven surface, which makes it difficult for light to be effectively reflected on the side wall, thereby further reducing the light leakage problem at the corners and edges of the cover plate when the cover plate is used in the display module.

Exemplarily, Figure 5 is a schematic cross-sectional structure diagram of a cover plate provided in an embodiment. As shown in Figure 5, the cover plate includes a light incident surface 100 and a light emitting surface 200, and a side wall 300 is arranged between the light incident surface 100 and the light emitting surface 200. The side wall 300 includes a first side wall 310 and a second side wall 320. The side of the first side wall 310 away from the second side wall 320 is connected to the edge of the light emitting surface 200, and the side of the second side wall 320 away from the first side wall 310 is connected to the edge of the light incident surface 100. The first side wall 310 is vertically arranged relative to the light incident surface 100, and the first side wall 310 and the second side wall 320 are arranged at an angle, and the angle formed by the second side wall 320 and the first side wall 310 is an obtuse angle, wherein the dimming material 400 is distributed on one side of the first side wall 310 and the second side wall 320.

Accordingly, in the present embodiment, by doping the edge area of the cover plate with dimming material, on the one hand, the dimming material 400 causes the transmittance of the edge area of the cover plate to be significantly reduced, and the incident light will lose a part of the luminous flux when passing through the edge area doped with the dimming material 400. On the other hand, the light incident into the edge area of the cover plate will be scattered on the surface of the dimming material 400, so that the light reflected at the first side wall 310 and the second side wall 320 is significantly reduced, and the light leakage problem at the corners and edges of the cover plate when the cover plate is applied to the display module can also be effectively improved.

Exemplarily, Figure 6 is a schematic cross-sectional structure diagram of another cover plate provided in an embodiment. As shown in Figure 6, the cover plate includes a light incident surface 100 and a light emitting surface 200, and a side wall 300 is arranged between the light incident surface 100 and the light emitting surface 200. The side wall 300 includes a first side wall 310 and a second side wall 320. The side of the first side wall 310 away from the second side wall 320 is connected to the edge of the light emitting surface 200, and the side of the second side wall 320 away from the first side wall 310 is connected to the edge of the light incident surface 100. The first side wall 310 is vertically arranged relative to the light incident surface 100, and the first side wall 310 and the second side wall 320 are arranged at an angle, and the angle formed by the second side wall 320 and the first side wall 310 is an obtuse angle, wherein the edge area doped with the dimming material 400 is adjacent to the first side wall 310 and the second side wall 320.

Accordingly, in the present embodiment, by doping the edge area of the cover plate with dimming material, on the one hand, the dimming material 400 causes the transmittance of the edge area of the cover plate to be significantly reduced, and the incident light will lose a part of the luminous flux when passing through the edge area doped with the dimming material 400. On the other hand, the light incident into the edge area of the cover plate will be scattered on the surface of the dimming material 400, so that the light reflected at the first side wall 310 and the second side wall 320 is significantly reduced, and the light leakage problem at the corners and edges of the cover plate when the cover plate is applied to the display module can also be effectively improved.

In some embodiments, the dimming material 400 is distributed in an island-like suspension in the edge region of the cover plate, and the density of the dimming material 400 decreases in a direction away from the edge region of the cover plate.

It can be understood that in this embodiment, the dimming material 400 is distributed in an island-like suspended state in the edge area of the cover plate. Therefore, the light incident into the edge area doped with the dimming material 400 is easily scattered on the surface of the dimming material 400, so that the light reflected from the light emitting surface 200 by the side wall 300 is significantly weakened, which is beneficial to improve the light leakage problem when the cover plate is applied to the display module.

Furthermore, in the direction away from the edge area of the cover plate, the density of the dimming material 400 decreases successively, that is, the closer the light incident into the edge area of the cover plate is to the side of the side wall 300, the easier it is to be scattered on the surface of the rare earth silicate microcrystal, so that most of the light incident into the edge area of the cover plate is scattered on the surface of the dimming material 400 and is difficult to be reflected by the side wall 300 and emitted from the light output surface 200.

At the same time, since the density of the dimming material 400 on the side close to the side wall 300 is greater than the density of the dimming material 400 on the side away from the side wall 300, that is, the edge area doped with the dimming material 400 is on the side close to the central area of the cover plate, the doping ratio of the dimming material is lower, and the impact on the transmittance of the cover plate is smaller, thereby ensuring that a certain amount of light can be emitted through the light emitting surface of the cover plate, thereby avoiding negative impact on the display effect of the display module.

In some embodiments, the doping range of the dimming material 400 in the direction away from the edge region of the cover plate is 10 μm-30 μm.

In the present embodiment, it is understandable that if the doping range of the dimming material 400 is greater than 30um, it will affect the light emitting effect of the display module prepared by using the cover plate, so that part of the light that should be emitted from the light emitting surface 200 of the cover plate is scattered on the surface of the dimming material 400, resulting in poor light emitting effect of the prepared display module. If the doping range of the dimming material 400 is less than 10um, there will still be a certain degree of light leakage defects when the cover plate is applied to the display module, resulting in poor yield of the prepared display module.

Furthermore, in this embodiment, the main material of the cover plate includes aluminosilicate, and the dimming material 400 doped in the edge region of the cover plate is selected from at least one of yttrium silicate, scandium silicate, erbium silicate, dysprosium silicate, gadolinium silicate or lanthanum silicate.

A second aspect of the embodiments of the present application provides a method for preparing a cover plate, comprising:

S10, providing a cover substrate;

S20, doping a dimming material in an edge region of the cover plate substrate to prepare a cover plate.

Wherein, the dimming material is rare earth silicate microcrystal.

In this embodiment, taking rare earth silicate microcrystals as an example, the preparation method of the cover plate is explained. Under a high temperature environment, after a certain amount of rare earth oxide is sprayed onto the side wall of the cover plate, the rare earth oxide is immediately attached to the side wall of the cover plate. Thereafter, the rare earth elements in the rare earth oxide gradually migrate from the side wall of the cover plate to the edge area of the cover plate in the form of ion diffusion. In the process of migration, because the main material of the cover plate includes aluminosilicate, the rare earth elements react with the aluminosilicate to form rare earth silicate crystal nuclei. Subsequently, by controlling the temperature, the rare earth silicate crystal nuclei can grow to form rare earth silicate microcrystals. When some rare earth silicate microcrystals reach the side wall of the cover plate and extend out of the side wall during growth, the side wall of the cover plate presents a slightly sandy state.

Specifically, in the present embodiment, the high temperature environment refers to a temperature environment of 600-700°C. It should be noted that due to the difference in rare earth elements in rare earth oxides, the diffusion rate of rare earth elements in the edge area of the cover plate, the formation temperature of rare earth silicate nuclei and the growth temperature of rare earth silicate microcrystals are all different. According to actual needs, the temperature of each stage of the rare earth silicate microcrystals can be controlled to obtain rare earth silicate microcrystals with corresponding particle size distribution, and then rare earth silicate microcrystals are doped in the edge area of the cover plate to improve the light leakage problem existing in the existing cover plate when used for the display module.

Wherein, the rare earth oxide is selected from at least one of yttrium oxide, scandium oxide, erbium oxide, dysprosium oxide, gadolinium oxide or lanthanum oxide. In this embodiment, when the rare earth oxide is selected from at least one of yttrium oxide, scandium oxide, erbium oxide, dysprosium oxide, gadolinium oxide or lanthanum oxide, correspondingly, the rare earth silicate microcrystals are selected from at least one of yttrium silicate microcrystals, scandium silicate microcrystals, erbium silicate microcrystals, dysprosium silicate microcrystals, gadolinium silicate microcrystals or lanthanum silicate microcrystals.

For example, when the oxide used in the preparation process is yttrium oxide, the doping element is yttrium, and the rare earth silicate microcrystals in the prepared doping layer are yttrium silicate microcrystals. When the oxide used in the preparation process is yttrium oxide and scandium oxide, the doping elements are yttrium and scandium, and the rare earth silicate microcrystals in the prepared doping layer are yttrium silicate microcrystals and scandium silicate microcrystals.

It is understandable that due to different doping elements, the particle size of the rare earth silicate microcrystals in the prepared doping layer is also different, so the different rare earth silicate microcrystals formed have different light scattering abilities. The type of rare earth silicate microcrystals used can be screened according to actual needs, and no further detailed description will be given here.

Further, the doping range of the dimming material in the direction away from the edge region of the cover plate is 10 μm-30 μm.

In the present embodiment, it is understandable that if the thickness of the edge area doped with the dimming material 400 is greater than 30um, it will affect the light emitting effect of the display module prepared by using the cover plate, so that part of the light that should be emitted from the light emitting surface 200 of the cover plate is scattered on the surface of the dimming material, resulting in poor light emitting effect of the prepared display module. If the thickness of the edge area doped with the dimming material 400 is less than 10um, the cover plate will still have a certain degree of light leakage defects, resulting in poor yield of the prepared display module.

According to a third aspect of an embodiment of the present application, a display module is provided. As shown in FIG. 7 , the display module includes a display panel 1 and a cover plate 2. The cover plate 2 is arranged on the light-emitting side of the display panel 1, and an edge area 20 of the cover plate 2 protrudes from the display panel 1, wherein the edge area 20 of the cover plate is doped with a dimming material 400, and the transmittance of the dimming material 400 is less than the transmittance of the main material of the cover plate 2.

In this embodiment, the cover plate 2 includes a central area 21 and an edge area 20, the central area 21 of the cover plate 2 is arranged corresponding to the display panel 1, and the edge area 20 of the cover plate 2 is arranged to protrude from the display panel 1, wherein the edge area 20 of the cover plate 2 is doped with a dimming material 400. By doping the dimming material 400 in the edge area 20 of the cover plate 2, on the one hand, the presence of the dimming material 400 makes the transmittance of the edge area 20 doped with the dimming material 400 significantly reduced compared with other areas of the cover plate that are not doped with the dimming material 400, and the light entering the cover plate 2 When passing through the edge area 20 doped with the dimming material 400, a portion of the luminous flux will be lost due to the low transmittance of the edge area 20 doped with the dimming material 400. On the other hand, the dimming material 400 in the edge area 20 doped with the dimming material 400 will form multiple scattering centers, so that the light entering the edge area 20 of the cover plate 2 is easily scattered in the edge area 20 doped with the dimming material 400, resulting in a reduction in the light emitted along the light leakage path, which can also effectively improve the edge light leakage problem when the cover plate 2 is applied to the display module.

In some embodiments, the cover plate 2 includes a light incident surface 100 and a light emitting surface 200 that are oppositely disposed, and a side wall 300 located between the light incident surface 100 and the light emitting surface 200 , and the doped dimming material 400 is distributed on the side wall 300 and/or one side of the side wall 300 .

In this embodiment, considering that when the cover plate 2 is applied to the display module, light leakage generally occurs at the corners or edges of the cover plate 2, therefore, by distributing the doped dimming material 400 on the side wall 300 and/or one side of the side wall 300, when the cover plate 2 is applied to the display module, the light leakage problem at the corners and edges of the cover plate 2 can be improved in a targeted manner.

In this embodiment, when the dimming material 400 is distributed on the side wall 300, the presence of the dimming material 400 causes the side wall 300 to have an uneven surface, which makes it difficult for light to be effectively reflected on the side wall 300, thereby further reducing the light leakage problem at the corners and edges of the cover plate 2 when the cover plate 2 is applied to the display module.

Exemplarily, as shown in Figure 7, the side wall 300 includes a first side wall 310 and a second side wall 320, wherein the first side wall 310 is vertically arranged relative to the light incident surface 100, the second side wall 320 is arranged at an angle to the first side wall 310, and the angle formed by the first side wall 310 and the second side wall 320 is an obtuse angle, the side of the first side wall 310 away from the second side wall 320 is connected to the edge of the light emitting surface 200, and the side of the second side wall 320 away from the first side wall 310 is connected to the edge of the light incident surface 100.

In this embodiment, the doped dimming material 400 is distributed on one side of the first side wall 310 and the second side wall 320. Taking the light leakage path of the light A as an example, when the light is emitted to the second side wall 320 along the original light leakage path, part of the light will be scattered on the surface of the dimming material 400 because the dimming material is distributed on one side of the second side wall 320. At the same time, because the transmittance of the dimming material 400 is lower than the transmittance of the main body material of the cover plate 2, part of the light will be lost when passing through the area doped with the dimming material 400. Even if part of the light still passes through the area where the dimming material 400 is distributed, 0 is reflected on the second side wall 320 and emitted toward the first side wall 310. However, in the process of emitting toward the first side wall 310, since the dimming material 400 is also distributed on one side of the first side wall 310, part of the light will continue to be scattered on the surface of the dimming material 400. At the same time, the transmittance of the dimming material 400 is lower than the transmittance of the main material of the cover plate 2. There is also a part of the light that is lost when passing through the edge area 20 doped with the dimming material 400, which ultimately makes it difficult for the light reflected on the first side wall 310 and emitted toward the light-emitting surface of the cover plate 2 to be perceived by the naked eye.

Similarly, taking the light leakage path of light B as an example, when the light is reflected on the light emitting surface 200 of the cover plate 2 and then emitted to the second side wall 320, since the dimming material 400 is distributed on one side of the second side wall 320, part of the light will be scattered on the surface of the dimming material 400. At the same time, since the transmittance of the dimming material 400 is lower than the transmittance of the main material of the cover plate 2, part of the light will be lost when passing through the edge area 20 doped with the dimming material 400. Even if some of the light still passes through the edge area 20 doped with the dimming material 400 and is emitted to the second side wall 320, The light is reflected toward the light emitting surface 200 of the cover plate 2. However, in the process of being emitted toward the light emitting surface 200 of the cover plate 2, since the dimming material 400 is also distributed on one side of the second side wall 320, part of the light will continue to be scattered on the surface of the dimming material 400. At the same time, since the transmittance of the dimming material 400 is lower than the transmittance of the main material of the cover plate 2, part of the light will be lost when passing through the edge area 20 doped with the dimming material 400, which ultimately makes the light reflected on the second side wall 320 and emitted to the light emitting surface 200 of the cover plate 2 difficult to be perceived by the naked eye.

Furthermore, both the first side wall 310 and the second side wall 320 are non-smooth surfaces including the dimming material 400 .

In this embodiment, the presence of the dimming material 400 causes the first side wall 310 and the second side wall 320 to have uneven surfaces, making it difficult for light to be effectively reflected on the first side wall 310 and the second side wall 320, thereby further reducing the light leakage problem at the corners and edges of the cover plate 2 when the cover plate 2 is applied to the display module.

In some embodiments, the display module further includes a shading plate 3 , which is disposed on a side of the cover plate 2 close to the display panel, and the shading plate 3 is disposed opposite to the non-display area 10 of the display panel 1 .

It should be noted that the display panel 1 includes a display area 11 and a non-display area 10 , wherein the display area 11 is arranged corresponding to the display area of the display module (ie, the AA area in FIG. 7 ).

In this embodiment, a shading plate 3 is provided on the side of the cover plate 2 close to the display panel 1 , and the shading plate 3 is arranged opposite to the non-display area 10 of the display panel 1 . The shading plate 3 can effectively reduce the light incident on the edge area of the cover plate 2 .

In some embodiments, the display module also includes a middle frame 4, which is arranged in a multi-layer structure formed by the cover plate 2, the shading plate 3 and the display panel 1, and the inner wall of the middle frame 4 is provided with a groove 40, the notch of the groove 40 faces the edge area 20 of the cover plate 2, and the groove 40 is adapted to the structure of the cover plate 2 protruding from the edge area 20 of the display panel 1.

Specifically, in the present embodiment, since the edge area 20 of the cover plate 2 protrudes from the display panel, a recess 40 adapted to the structure of the edge area 20 of the cover plate 2 protruding from the display panel 1 is provided on the inner wall of the middle frame 4, so that the cover plate 2 can be stably fixed in the middle frame 4. It can be understood that in order to reduce the gap between the middle frame 4 and the multi-layer structure formed by the cover plate 2, the shading plate 3 and the display panel 1, it is also possible to fill a glue layer at the contact portion between the middle frame and the multi-layer structure, so as to eliminate multiple gaps that may exist between the middle frame and the multi-layer structure through the filled glue layer, thereby enhancing the stability of the multi-layer structure after being fixed to the middle frame 4, and avoiding damage to the display module during movement.

In some embodiments, the display module also includes a polarizing plate 5 and an optical adhesive layer 6, which are arranged between the display panel 1 and the cover plate 2, wherein the polarizing plate 5 is arranged close to the light emitting side of the display panel 1, the optical adhesive layer 6 is arranged close to the cover plate 2, and the orthographic projection of the optical adhesive layer 6 on the cover plate 2 covers a portion of the shading plate 3.

In this embodiment, the polarizing plate 5 is used to adjust the light emitted by the display panel 1 , and the optical adhesive layer 6 is used to stably fix the cover plate 2 to a side of the polarizing plate 5 away from the display panel 1 .

According to a fourth aspect of the embodiments of the present application, a display device is provided, comprising: the cover plate as described in the first aspect, or the cover plate prepared by the method for preparing the cover plate as described in the second aspect, or the display module as described in the third aspect.

It should be noted that the display device provided in the embodiments of the present application may be: electronic paper, mobile phones, tablet computers, televisions, monitors, laptop computers, wearable electronic devices, digital photo frames, navigators, and any other products or components with display functions, and the embodiments of the present application are not specifically limited.

The cover plate provided by the embodiment of the present application, when applied to a display module, is doped with dimming material in the edge area of the cover plate. On the one hand, the presence of the dimming material significantly reduces the transmittance of the edge area doped with the dimming material compared to other areas of the cover plate that are not doped with the dimming material. When the light entering the cover plate passes through the edge area doped with the dimming material, a portion of the light flux will be lost due to the lower transmittance of the edge area doped with the dimming material, thereby improving the light leakage of the cover plate. On the other hand, the dimming material in the edge area doped with the dimming material will form multiple scattering centers, so that the light entering the edge area of the cover plate is easily scattered in the edge area doped with the dimming material, resulting in a reduction in the light emitted along the leakage light path, which can also effectively improve the light leakage problem at the edge of the cover plate.

The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Although preferred embodiments of the present specification have been described, additional changes and modifications may be made to these embodiments by those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present specification. Obviously, those skilled in the art may make various changes and modifications to the present specification without departing from the spirit and scope of the present specification. Thus, if these modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, the present specification is also intended to include these modifications and variations.

Claims (8)

1. The cover plate is applied to a display module, the display module comprises a display panel, the cover plate is arranged on the light emitting side of the display panel, and is characterized in that the cover plate comprises a central area and an edge area, the central area of the cover plate is arranged corresponding to the display panel, the edge area of the cover plate is doped with a dimming material, and the transmittance of the dimming material is smaller than that of the main body material of the cover plate;

The dimming materials are in island-shaped suspension distribution in the edge area of the cover plate, and the density of the dimming materials is sequentially reduced in the direction away from the edge area of the cover plate;

the light-adjusting material is rare earth silicate microcrystal;

The cover plate comprises a light incident surface, a light emergent surface and a side wall, wherein the light incident surface and the light emergent surface are oppositely arranged, the side wall is positioned between the light incident surface and the light emergent surface, and the doped dimming material is distributed on the side wall and/or one side of the side wall.

2. The cover plate according to claim 1, wherein the dimming material is doped in a range of 10 μm-30 μm in a direction away from an edge region of the cover plate.

3. A method for producing a cover sheet according to claim 1 or 2, comprising:

Providing a cover plate substrate;

And doping dimming materials in the edge area of the cover plate substrate to prepare the cover plate.

4. A display module, comprising:

A display panel;

The cover plate according to claim 1 or 2, disposed on a light emitting side of the display panel, and an edge region of the cover plate protrudes from the display panel.

5. The display module of claim 4, further comprising a light shield disposed on a side of the cover plate adjacent to the display panel, the light shield being disposed opposite the non-display area of the display panel.

6. The display module assembly of claim 5, further comprising a middle frame surrounding the cover plate, the light shielding plate, and the display panel, wherein a groove is formed in an inner wall of the middle frame, a notch of the groove faces an edge area of the cover plate, and the groove is matched with the structure of the cover plate protruding out of the edge area of the display panel.

7. The display module of claim 6, further comprising a polarizing plate and an optical adhesive layer, wherein the polarizing plate and the optical adhesive layer are disposed between the display panel and the cover plate, the polarizing plate is disposed near a light emitting side of the display panel, the optical adhesive layer is disposed near the cover plate, and an orthographic projection of the optical adhesive layer on the cover plate covers a portion of the light shielding plate.

8. A display device comprising a display module according to any one of claims 4-7.