Display panel and display device

Abstract

The application discloses a display panel and a display device, wherein the display panel comprises a color resistance layer and an electronic paper layer stacked from top to bottom, the color resistance layer comprises a plurality of color resistances and a plurality of black matrices, the black matrices are arranged between adjacent color resistances, a white space region is arranged between the adjacent color resistances, the black matrices are attached to color resistance side walls at two ends of the white space region, and a white space light transmission area is formed between the two black matrices of each white space region; the electronic paper layer comprises a plurality of first transparent cavities and a plurality of second transparent cavities, each first transparent cavity is stacked below a corresponding color resistance, and each second transparent cavity is stacked below a corresponding white space region. The color deviation problem in the related art can be solved through the display panel structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] Color electronic paper is a new display technology, which has excellent display effect and energy saving and environmental protection characteristics. It can present rich and colorful images and text, and is suitable for various fields. However, the structure of the color electronic paper currently has the problem of low brightness. In order to solve the problem of low brightness, the related technology increases the white space area around the color resistance to improve the pixel display brightness, but this way will have obvious color deviation problem. SUMMARY

[0003] The present application provides a display panel and a display device to solve the color deviation problem in the related art.

[0004] According to a first aspect of the embodiments of the present application, a display panel is provided, comprising a color resistance layer and an electronic paper layer stacked from top to bottom, the color resistance layer comprising a plurality of color resistances and a plurality of black matrices, the black matrices being arranged between adjacent color resistances, and a white space area being arranged between adjacent color resistances, characterized in that the black matrix is attached to the color resistance sidewall at both ends of the white space area, and a white space light transmission area is formed between the two black matrices of each white space area; the electronic paper layer comprises a plurality of first transparent cavities and a plurality of second transparent cavities, each first transparent cavity being stacked below the corresponding color resistance, and each second transparent cavity being stacked below the corresponding white space area.

[0005] In one possible implementation, the first transparent cavity is a positive refractive material, and the second transparent cavity is a negative refractive material, or the first transparent cavity is a negative refractive material, and the second transparent cavity is a positive refractive material.

[0006] In one possible implementation, the display panel further comprises a reflective layer stacked below the electronic paper layer, the reflective layer being used for reflecting part of natural light incident from the white space light transmission area to the color resistance layer.

[0007] In one possible implementation, a first reflective coating is arranged on the reflective layer, and a second reflective coating is arranged on one side inner wall of the second transparent cavity; the second reflective coating is used for reflecting natural light to the first reflective coating, and the first reflective coating refracts the natural light from the other side of the second transparent cavity into the first transparent cavity, and reflects the natural light to the corresponding color group through the first transparent cavity.

[0008] In a possible implementation, the black matrix has a cross section in the direction of the natural light incidence in a trapezoidal structure or a triangular structure, the trapezoidal structure includes a side waist away from the color resistance layer, and one side of the side waist of the black matrix is provided with a third reflective coating; the triangular structure includes a side away from the color resistance layer, and one side of the side of the black matrix is provided with a third reflective coating.

[0009] In a possible implementation, the first transparent cavity contains black charged particles, one side of the first transparent cavity is provided with a first control electrode, and the top of the first transparent cavity is provided with a second control electrode; when a negative voltage is applied to the first control electrode, the black charged particles are adsorbed to one side of the first transparent cavity, so that the light rays refracted from the other side of the first transparent cavity can be reflected to the corresponding color resistance, and the display panel displays a bright state; when a negative voltage is applied to the second control electrode, the black charged particles are adsorbed to the top of the first transparent cavity, and the light rays in the electronic paper layer are absorbed, and the display panel displays a dark state.

[0010] In a possible implementation, the first transparent cavity and the second transparent cavity have different refractive indexes, the cross section of the second transparent cavity in the direction of the natural light incidence has an inverted triangular shape, and the two sides of the inverted triangular shape are the junctions of the first transparent cavity and the second transparent cavity; the natural light is incident to one side of the second transparent cavity through the blank light transmission area, is refracted into the first transparent cavity, and is reflected to the corresponding color group through the first transparent cavity.

[0011] In a possible implementation, the first transparent cavity has a refractive index greater than that of the second transparent cavity.

[0012] In a possible implementation, the display panel further includes a reflective layer stacked below the electronic paper layer, the reflective layer includes black charged particles and white charged particles, and the reflective layer is provided with a third control electrode below; when a positive voltage is applied to the third control electrode, the white charged particles are adsorbed to the reflective layer, and the light rays incident to the electronic paper layer are reflected, and the display panel displays a bright state; when a negative voltage is applied to the third control electrode, the black charged particles are adsorbed to the reflective layer, and the light rays incident to the electronic paper layer are absorbed, and the display panel displays a dark state.

[0013] According to a second aspect of the embodiments of the present application, a display device is also provided, including the display panel of any of the foregoing.

[0014] The display panel and the display device provided by the embodiment of the present application, the display panel comprises a color resistance layer and an electronic paper layer stacked from top to bottom, the color resistance layer comprises a plurality of color resistances and a plurality of black matrices, the black matrices are arranged between adjacent color resistances, and a white space area is arranged between the adjacent color resistances, and the black matrices are attached to the color resistance side walls at both ends of the white space area, and a white space light transmission area is formed between the two black matrices of each white space area; the electronic paper layer comprises a plurality of first transparent cavities and a plurality of second transparent cavities, each first transparent cavity is stacked below a corresponding color resistance, and each second transparent cavity is stacked below a corresponding white space area. In this way, the black matrices are added between the color resistances to block and reduce the area of the white space area, thereby improving the color deviation problem, meanwhile, the white space light transmission area is left between the two black matrices to ensure a certain display brightness improvement effect, and after the light enters the white space area, the light is refracted in the corresponding first transparent cavity and the second transparent cavity, so that the light reflected to the adjacent color resistance is more uniform, and the color deviation degree is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 is a display panel structure schematic diagram of a white space design in the prior art;

[0017] Figure 2 is a structure schematic diagram of a display panel according to the embodiment of the present application;

[0018] Figure 3 is a first bright state display schematic diagram according to the embodiment of the present application;

[0019] Figure 4 is a first dark state display schematic diagram according to the embodiment of the present application;

[0020] Figure 5 is a trapezoidal shape schematic diagram of a black matrix according to the embodiment of the present application;

[0021] Figure 6 is a second bright state display schematic diagram according to the embodiment of the present application;

[0022] Figure 7 is a second dark state display schematic diagram according to the embodiment of the present application;

[0023] Figure 8 is a light path schematic diagram in which the refractive index of the first transparent cavity is greater than the refractive index of the second transparent cavity according to the embodiment of the present application.

[0024] 1-color resist layer; 2-electronic paper layer; 3-reflective layer; 11-void area; 12-black matrix; 13-color resist; 21-first transparent cavity; 22-second transparent cavity; 23-first control electrode; 24-second control electrode; 31-first reflective coating; 221-second reflective coating; 211-black charged particles; 121-third reflective coating. DETAILED DESCRIPTION

[0025] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should belong to the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0027] Embodiment 1

[0028] Reference Figure 1 As Figure 1 As shown in the left void area 11 in FIG. 1, the ideal state of the conventional void design is that the natural light is vertically incident, and after being reflected by the reflective layer, it is vertically emitted from the void area, and the void area displays white light, so as to improve the display brightness. However, to achieve this effect, the void area needs to be small enough to make the angle of the incident light small enough to be close to the collimated light. If the void area is too large, it will cause a larger angle of light to be incident, as shown in the right void area in FIG. 1. After being reflected, the light with a large angle of incidence has a certain probability of being incident on the color resist adjacent to the void area, resulting in a relative increase in the brightness displayed by the color resist, and a color deviation problem. Figure 1

[0029] ​The above situation has two main problems. First, when the display panel displays monochrome, the intended color may shift due to large-angle light incident on adjacent color resistors, resulting in a mixed-color shift problem. For example, if the intended color is only red, some blue light may be mixed in. Second, because this probabilistic situation cannot guarantee that the intensity of the reflected natural light from each blank area will be consistent across all color resistors, the color is difficult to control, leading to an impure color shift problem.

[0030] Based on this, embodiments of this application provide a display panel. Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application. For example... Figure 2 As shown, the display panel may include: a color resist layer 1 and an electronic paper layer 2 stacked from top to bottom. The color resist layer includes multiple color resists 13 and multiple black matrices 12. The black matrices are disposed between adjacent color resists, and a white space area 11 is provided between adjacent color resists. The black matrices are attached to the sidewalls of the color resists at both ends of the white space area, and a white space light-transmitting area is formed between the two black matrices in each white space area. The electronic paper layer includes multiple first transparent cavities 21 and multiple second transparent cavities 22. Each first transparent cavity is stacked below the corresponding color resist, and each second transparent cavity is stacked below the corresponding white space area.

[0031] The color resist layer comprises multiple color resists arranged horizontally, including red (R), green (G), and blue (B) color resists, to achieve color display. A black matrix (BM), also known as a black matrix, is placed between adjacent color resists to block light.

[0032] A blank area is provided between adjacent color resists. Black matrices are attached to the sidewalls of the color resists at both ends of the blank area to isolate the RGB color resists and prevent color mixing. A light-transmitting blank area is formed between the two black matrices in each blank area, allowing some natural light to enter the electronic paper layer from the blank area. This embodiment reduces the area of ​​the blank area by adding BM blocking between the color resists, thus improving the color shift problem. At the same time, the light-transmitting blank area between the two BMs ensures a certain improvement in display brightness. Furthermore, after the light enters from the blank area, it is refracted in the corresponding first and second transparent cavities, making the light reflected to the adjacent color resists more uniform and reducing the degree of color shift.

[0033] In one embodiment of this example, the first transparent cavity is a positive refractive material and the second transparent cavity is a negative refractive material, or the first transparent cavity is a negative refractive material and the second transparent cavity is a positive refractive material.

[0034] In this embodiment, either the first transparent cavity or the second transparent cavity can be made of a positive refractive material, and the other can be made of a negative refractive material. (Refer to...) Figure 2In the embodiment, the first transparent cavity is a positive refractive material, and the second transparent cavity is a negative refractive material.

[0035] When the natural light is incident on the second transparent cavity to the first transparent cavity, the refracted light and the incident light are located on the same side of the interface normal, that is, a negative refraction phenomenon occurs; when the light is incident on the color resistance from the first transparent cavity, the refracted light and the incident light are located on the opposite side of the interface normal, that is, a positive refraction phenomenon occurs. By using the positive / negative refractive materials in combination, more light can pass through the color resistance and be emitted, and the color deviation problem is reduced.

[0036] In an embodiment of the embodiment, the display panel further comprises a reflective layer stacked below the electronic paper layer, the reflective layer being configured to reflect part of the natural light incident from the blank light transmission area to the color resistance layer.

[0037] Referring to Figure 3 A reflective layer 3 is further provided below the electronic paper layer, and the reflective layer can include white charged particles. The white charged particles can reflect light, and the reflective layer reflects the light incident to the bottom of the electronic paper layer outward, and is mainly used to reflect part of the natural light incident from the blank light transmission area to the color resistance layer, and is also used to reflect part of the natural light incident from the color resistance back to the color resistance to display colors.

[0038] In the embodiment, a first reflective coating 31 is provided on the reflective layer, and a second reflective coating 221 is provided on one side of the inner wall of the second transparent cavity; the second reflective coating is configured to reflect the natural light to the first reflective coating, and the first reflective coating is configured to refract the natural light from the other side of the second transparent cavity into the first transparent cavity, and reflect the natural light to the corresponding color group through the first transparent cavity.

[0039] For example, a second reflective coating is provided on the right side of the inner wall of the second transparent cavity, and the second reflective coating is configured to reflect the natural light to the first reflective coating, and the first reflective coating is configured to refract the natural light from the other side of the second transparent cavity into the first transparent cavity, and reflect the natural light to the corresponding color group through the first transparent cavity. Figure 3 When the natural light is incident on the second transparent cavity to the first transparent cavity, the refracted light and the incident light are located on the same side of the interface normal, that is, a negative refraction phenomenon occurs; when the light is incident on the color resistance from the first transparent cavity, the refracted light and the incident light are located on the opposite side of the interface normal, that is, a positive refraction phenomenon occurs. By using the positive / negative refractive materials in combination, more light can pass through the color resistance and be emitted, and the color deviation problem is reduced.

[0040] In the embodiment, the part of the natural light incident from the white space light transmission area and incident to one side (for example, the left side) of the second transparent cavity can be refracted to the color resistance layer on the left side directly through the positive and negative refractive material interface on the left side; the natural light incident to the other side (the right side) of the second transparent cavity can be refracted to the color resistance layer on the same side (for example, the left side) again after being reflected by the reflective coating on the right side. Through the structure of the embodiment, the natural light from each white space area is refracted to the color resistance layer on the same side as much as possible, and the color influence of other color resistance layers is reduced in monochromatic display, thereby reducing the color deviation and improving the light utilization.

[0041] If the second transparent cavity is set to be transparent, the natural light incident from the white space light transmission area to the second transparent cavity vertically can be reflected by the reflective layer at the bottom and then exit from the white space light transmission area vertically. Therefore, the white space area appears white, and the overall display panel is prone to whitening. In another embodiment of the present embodiment, the second transparent cavity is filled with scattering particles.

[0042] In the embodiment, the second transparent cavity is filled with scattering particles. After the natural light from the white space light transmission area enters the second transparent cavity, the natural light is dispersed by the scattering particles in the second transparent cavity, so that the natural light is transmitted to the surrounding, and the opportunity of light exiting from the color resistance layer is increased. Figure 3 After the natural light enters the second transparent cavity, the natural light is dispersed by the scattering particles. When the dispersed light is incident to both sides of the second transparent cavity, the light can be refracted from the second transparent cavity to the first transparent cavity and then exit from the corresponding color resistance layer. In the embodiment, the second transparent cavity is filled with scattering particles, so that the light exiting from the color resistance layer is increased, the color display purity and color saturation are improved, the light utilization is improved, the light exiting from the white space light transmission area is reduced, and the whitening degree is reduced.

[0043] In the embodiment, the second transparent cavity below the white space area is filled with scattering particles. The structure can maximize the light exiting from the color resistance layer after the incident natural light is scattered and reflected, and improve the light utilization.

[0044] In another embodiment of the present embodiment, the cross section of the black matrix along the direction of the incident natural light is a trapezoidal structure or a triangular structure. The trapezoidal structure includes a side waist away from the color resistance layer, and the third reflective coating 121 is arranged on one side of the side waist of the black matrix. The triangular structure includes a side away from the color resistance layer, and the third reflective coating is arranged on one side of the side of the black matrix.

[0045] To avoid the natural light incident on the black matrix being absorbed by the black matrix, causing the natural light to be unable to enter the electronic paper layer, the third reflective coating is arranged on the surface of the black matrix. When the natural light is incident on the black matrix, the third reflective coating on the surface of the black matrix reflects the natural light to the white space light transmission area, and the natural light enters the electronic paper layer, thereby improving the utilization rate of light. In addition, the black matrix is arranged in a structure of being narrow at the top and wide at the bottom. The specific shape of the black matrix being narrow at the top and wide at the bottom can be selected according to actual needs, including but not limited to a right-angled triangle as shown in Figure 3 or a right-angled trapezoid as shown in Figure 5 . The right-angled triangle can increase more incident natural light, and the right-angled trapezoid can improve the light shielding effect and hinder color mixing. The narrow top structure of the black matrix increases the range of the external natural light incident, so that the natural light at a large angle can also enter the inside of the display panel, thereby improving the overall display brightness of the display panel. The wide bottom structure of the black matrix reduces the influence of the light rays emitted from the white space light transmission area after being reflected by the natural light, thereby reducing the utilization rate of the natural light, and further improving the optical utilization rate.

[0046] In another embodiment of the present embodiment, the first transparent cavity contains black charged particles, one side of the first transparent cavity is provided with a first control electrode, and the top of the first transparent cavity is provided with a second control electrode. When a negative voltage is applied to the first control electrode, the black charged particles are adsorbed to one side of the first transparent cavity, so that the light rays refracted from the other side of the first transparent cavity and the light rays incident from the color resistance can be reflected to the corresponding color resistance, and the display panel displays a bright state. When a negative voltage is applied to the second control electrode, the black charged particles are adsorbed to the top of the first transparent cavity, and the light rays in the electronic paper layer are absorbed, so that the light rays cannot be emitted through the color resistance, and the display panel displays a dark state.

[0047] The first transparent cavity contains black charged particles, and the black particles are positively charged and can absorb light. A first control electrode 23 is arranged on one side (for example, the left side) of the first transparent cavity, and a second control electrode 24 is arranged on the top of the first transparent cavity. The black charged particles are attracted to the corresponding position through the electrodes. As shown in Figure 3 , when a negative voltage is applied to the first control electrode, the black charged particles are adsorbed to the left side of the first transparent cavity, so that the light rays refracted from the right side of the first transparent cavity and the light rays incident from the color resistance can be reflected to the color resistance above, and the display panel displays a bright state, that is, the state of displaying the picture of the display panel. As shown in Figure 4 , when a negative voltage is applied to the second control electrode, the black charged particles are adsorbed to the top of the first transparent cavity, and the reflected light rays in the electronic paper layer are absorbed, and the light rays incident from the color resistance are blocked, so that the light rays cannot be emitted through the color resistance, and the display panel displays a dark state, that is, the state of the display panel being powered off and not displaying the picture.

[0048] The ambient light is incident from the blank light transmission area, and is reflected and is likely to be emitted from the blank light transmission area again. Although the display brightness is improved, when displaying a single color or mixed color, some ambient light components are involved, and the color purity of the display is low and the saturation is not high. To this end, in another embodiment of the present embodiment, the refractive index of the first transparent cavity and the second transparent cavity is different, the shape of the section of the second transparent cavity along the direction of the natural light entering is an inverted triangle, and the two sides of the inverted triangle are the junctions of the first transparent cavity and the second transparent cavity; the natural light incident through the blank light transmission area is incident to one side of the second transparent cavity (triangular light transmission part), and is refracted into the first transparent cavity and reflected by the first transparent cavity to the corresponding color group.

[0049] As shown in Figure 6 , the natural light incident through the blank light transmission area is incident to the left and right sides of the second transparent cavity (triangular light transmission part), that is, the junctions of the first transparent cavity and the second transparent cavity. At this time, the light incident to the left side will be finally propagated to the left color barrier for emission, and the light incident to the right side will be finally propagated to the right color barrier for emission. The present embodiment can uniformly distribute the natural light to the left and right color barriers through the isosceles triangle structure, so that the natural light uniformly distributed to each color barrier is close to consistent, avoiding the color deviation problem caused by uneven distribution of the incident natural light in the conventional blank design, and the incident natural light is finally propagated to the two color barriers for emission, thereby greatly reducing the light emitted from the blank area, and higher purity color display can be realized.

[0050] In the present embodiment, the refractive index of the first transparent cavity is less than the refractive index of the second transparent cavity.

[0051] In the present embodiment, the refractive index n1 of the first transparent cavity is different from the refractive index n2 of the second transparent cavity, and preferably n1 < n2. As shown in Figure 8 , if n1 > n2, part of the light is reflected from the second transparent cavity to the first transparent cavity, and the refracted light rays in the first transparent cavity have a larger angle, and the light backflow phenomenon as shown in Figure 8 will occur, that is, the natural light is reflected back into the second transparent cavity after passing through the reflection layer, and is finally absorbed by the upper black matrix, thereby reducing the light utilization rate. Therefore, in the present embodiment, the refractive index of the first transparent cavity is less than the refractive index of the second transparent cavity, and the light path diagram as shown in Figure 6 , part of the light is refracted from the second transparent cavity to the first transparent cavity, and the refracted light rays in the first transparent cavity have a smaller angle, and the natural light is reflected to the adjacent color barrier after passing through the reflection layer, thereby further improving the light utilization rate.

[0052] In the embodiment, the display panel further comprises a reflective layer stacked below the electronic paper layer, the reflective layer comprising black charged particles and white charged particles, and a third control electrode is arranged below the reflective layer; when a positive voltage is applied to the third control electrode, the white charged particles are adsorbed to the reflective layer, and the light incident to the electronic paper layer is reflected, and the display panel displays a bright state; when a negative voltage is applied to the third control electrode, the black charged particles are adsorbed to the reflective layer, and the light incident to the electronic paper layer is absorbed, and the display panel displays a dark state.

[0053] In the embodiment, the black charged particles and the white charged particles are placed in the lowermost layer (i.e., the reflective layer), and the state transition thereof can be controlled by the electrode. The black particles are positively charged, and the white particles are negatively charged. A third control electrode is arranged below the reflective layer, and the black charged particles or the white charged particles are attracted to the corresponding position by applying positive or negative voltage to the electrode. As shown in FIG. 6, when a positive voltage is applied to the third control electrode, the white charged particles are adsorbed to the reflective layer, so that the light refracted from the right side of the first transparent cavity and the light incident from the color barrier can be reflected to the color barrier above, and the display panel displays a bright state. As shown in FIG. 7, when a negative voltage is applied to the third control electrode, the black charged particles are adsorbed to the reflective layer, and the light incident to the electronic paper layer and the light incident from the color barrier are absorbed, and the light cannot be emitted through the color barrier, and the display panel displays a dark state. Figure 6 Figure 7 As shown in FIG. 7, when a negative voltage is applied to the third control electrode, the black charged particles are adsorbed to the reflective layer, and the light incident to the electronic paper layer and the light incident from the color barrier are absorbed, and the light cannot be emitted through the color barrier, and the display panel displays a dark state.

[0054] Embodiment 2

[0055] In the embodiment, a display device is also provided, and the display device comprises the display panel as described above. For the implementation of the above embodiments and preferred embodiments, the description has been made and will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and contemplated.

[0056] It should be noted that each of the above modules can be implemented by software or hardware, and for the latter, the implementation can be achieved in the following ways, but is not limited thereto: all the above modules are located in the same processor; or the above modules are located in different processors in any combination.

[0057] Optionally, specific examples in the embodiment can refer to the examples described in the above embodiments and optional embodiments, and the embodiment will not be repeated here.

[0058] The serial numbers of the embodiments of the present application described above are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0059] ​In the above-described embodiments of the present application, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0060] In several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. Among them, the above-mentioned device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or modules shown or discussed can be indirect coupling or communication connection through some interface, unit or module, and can be electrical or other forms.

[0061] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0062] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0063] The integrated unit, if realized in the form of software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the essential part or all or part of the technical solutions that make contributions to the prior art can be embodied in the form of software product, which is stored in a computer storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The foregoing computer storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic or optical disk and various program code storage media.

[0064] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A display panel comprising a color resist layer and an electronic paper layer stacked from top to bottom, wherein the color resist layer comprises a plurality of color resists, and a blank area is provided between adjacent color resists, characterized in that, The color resist layer also includes multiple black matrices, which are attached to the color resist sidewalls at both ends of the white area, and a white light-transmitting area is formed between the two black matrices in each white area; The electronic paper layer includes multiple first transparent cavities and multiple second transparent cavities. Each first transparent cavity is stacked below the corresponding color resist, and each second transparent cavity is stacked below the corresponding blank area. The first transparent cavity is made of a positive refractive material, and the second transparent cavity is made of a negative refractive material, or the first transparent cavity is made of a negative refractive material, and the second transparent cavity is made of a positive refractive material; The interior of the second transparent cavity is filled with scattering particles.

2. The display panel according to claim 1, characterized in that, The display panel also includes a reflective layer stacked below the electronic paper layer, which is used to reflect a portion of the natural light incident from the blank light-transmitting area to the color resist layer.

3. The display panel according to claim 2, characterized in that, The reflective layer is provided with a first reflective coating, and the inner wall of one side of the second transparent cavity is provided with a second reflective coating; the second reflective coating is used to reflect natural light to the first reflective coating, and the first reflective coating refracts the natural light from the other side of the second transparent cavity into the first transparent cavity, and reflects it to the corresponding color group through the first transparent cavity.

4. The display panel according to claim 1, characterized in that, The cross-section of the black matrix along the direction of natural light incidence is a trapezoidal or triangular structure that is narrower at the top and wider at the bottom. The trapezoidal structure includes a side waist away from the color resist layer, and a third reflective coating is provided on one side of the black matrix side waist. The triangular structure includes a side away from the color resist layer, and a third reflective coating is provided on one side of the black matrix side.

5. The display panel according to claim 1, characterized in that, The first transparent cavity contains black charged particles, a first control electrode is provided on one side of the first transparent cavity, and a second control electrode is provided on the top of the first transparent cavity; When a negative voltage is applied to the first control electrode, the black charged particles are adsorbed onto one side of the first transparent cavity, so that the light refracted from the other side of the first transparent cavity can be reflected to the corresponding color resist, and the display panel displays a bright state; When a negative voltage is applied to the second control electrode, the black charged particles are attracted to the top of the first transparent cavity, absorbing the light in the electronic paper layer, and the display panel displays a dark state.

6. The display panel according to claim 1, characterized in that, The first transparent cavity and the second transparent cavity have different refractive indices. The cross-section of the second transparent cavity along the direction of natural light incidence is an inverted triangle, and the two sides of the inverted triangle are the junctions of the first transparent cavity and the second transparent cavity. Natural light passes through the white space and enters one side of the second transparent cavity, refracts into the first transparent cavity, and is reflected by the first transparent cavity to the corresponding color group.

7. The display panel according to claim 6, characterized in that, The refractive index of the first transparent cavity is greater than that of the second transparent cavity.

8. The display panel according to any one of claims 6 to 7, characterized in that, The display panel also includes a reflective layer stacked below the electronic paper layer, the reflective layer including black charged particles and white charged particles, and a third control electrode is disposed below the reflective layer; When a positive voltage is applied to the third control electrode, the white charged particles are attracted to the reflective layer, reflecting the light incident on the electronic paper layer, and the display panel displays a bright state; When a negative voltage is applied to the third control electrode, the black charged particles are adsorbed onto the reflective layer, absorbing the light incident on the electronic paper layer, and the display panel displays a dark state.

9. A display device, characterized in that, The display device includes a display panel as described in any one of claims 1-8.

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