Display panel and display device

Abstract

The invention discloses a display panel and a display device.The display panel comprises a color resistance layer and an electronic paper layer which are stacked from top to bottom, the color resistance layer comprises a plurality of color resistors and a plurality of black matrixes, the black matrixes are arranged between the adjacent color resistors, blank areas are arranged between the adjacent color resistors, the black matrixes are attached to the side walls of the color resistors at the two ends of the blank areas, and the electronic paper layer is arranged on the electronic paper layer. A blank-leaving light-transmitting area is formed between the two black matrixes of each blank-leaving 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 the corresponding color resistor, and each second transparent cavity is stacked below the corresponding blank area. Through the display panel structure, the problem of color cast in related technologies can be solved.

Description

Technical Field

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

[0002] Color electronic paper is an emerging display technology with excellent display effects and energy-saving and environmental protection features. It can present colorful images and texts and is applicable to a variety of fields. However, the current structure of color electronic paper has the problem of low brightness. To solve the low brightness problem, related technologies increase the pixel display brightness by adding a blank area around the color block, but this method will have obvious color deviation problems. Summary of the invention

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

[0004] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising a color resist layer and an electronic paper layer stacked from top to bottom, the color resist layer comprising a plurality of color resists and a plurality of black matrices, the black matrices being arranged between adjacent color resists, and blank areas being arranged between adjacent color resists, characterized in that the black matrices are attached to the color resist side walls at both ends of the blank areas, and a blank light-transmitting area is formed between two black matrices in each blank area; the electronic paper layer comprises a plurality of first transparent cavities and a plurality of second transparent cavities, each of the first transparent cavities being stacked below a corresponding color resist, and each of the second transparent cavities being stacked below a corresponding blank area.

[0005] In a possible implementation, 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.

[0006] In a possible implementation, the display panel further includes a reflective layer stacked below the electronic paper layer, and the reflective layer is used to reflect part of the natural light incident from the blank light-transmitting area to the color-resistance layer.

[0007] In a possible implementation, a first reflective coating is provided on the reflective layer, and a second reflective coating is provided on an inner wall of one side of the second transparent cavity; 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 is reflected to the corresponding color group through the first transparent cavity.

[0008] In a possible embodiment, the cross-section of the black matrix along the direction of incidence of natural light is a trapezoidal structure or a triangular structure that is narrow at the top and wide 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 surface of the black matrix side waist. The triangular structure includes a side edge away from the color resist layer, and a third reflective coating is provided on one surface of the black matrix side edge.

[0009] In a possible embodiment, the first transparent cavity includes 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 to 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 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, absorb the light in the electronic paper layer, 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 indices, and the cross-section of the second transparent cavity along the direction of incidence of natural light is in the shape of an inverted triangle, and two sides of the inverted triangle are the junctions of the first transparent cavity and the second transparent cavity; natural light passes through the blank light-transmitting area and is incident on one side of the second transparent cavity, refracted into the first transparent cavity, and reflected to the corresponding color group through the first transparent cavity.

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

[0012] In a possible embodiment, the display panel also includes a reflective layer stacked below the electronic paper layer, the reflective layer includes 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, reflect the light incident to 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 to the reflective layer, absorb the light incident to the electronic paper layer, 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 further provided, comprising the display panel as described in any one of the above items.

[0014] A display panel and a display device proposed in an embodiment of the present application include a color resist layer and an electronic paper layer stacked from top to bottom, wherein the color resist layer includes a plurality of color resists and a plurality of black matrices, wherein the black matrix is ​​arranged between adjacent color resists, and a blank area is arranged between adjacent color resists, and the black matrix is ​​attached to the color resist side walls at both ends of the blank area, and a blank light-transmitting area is formed between two black matrices in each blank area; the electronic paper layer includes a plurality of first transparent cavities and a plurality of second transparent cavities, wherein each first transparent cavity is stacked under a corresponding color resist, and each second transparent cavity is stacked under a corresponding blank area. In this way, black matrix shielding is added between the color resists, the blank area is reduced, and the color deviation problem is improved. At the same time, a blank light-transmitting area is left between the two black matrices, which ensures a certain display brightness improvement effect, and after the light enters from the blank area, it is refracted in the corresponding first transparent cavity and the second transparent cavity, so that the light reflected to the adjacent color resist is more uniform, and the degree of color deviation is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 1 It is a schematic diagram of a display panel structure with a blank design in the prior art;

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

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

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

[0020] Figure 5 Schematic diagram of a trapezoidal shape of a black matrix in an embodiment of the present application;

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

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

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

[0024] 1-color resistance layer; 2-electronic paper layer; 3-reflection layer; 11-blank area; 12-black matrix; 13-color resistance; 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 enable those skilled in the art to better understand the present application, the technical solutions 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 embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within 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", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] Example 1

[0028] Reference Figure 1 ,like Figure 1 As shown in the blank area 11 on the left side of the middle, the ideal state of conventional blank design is that natural light is incident vertically, reflected by the reflective layer and then emitted vertically from the blank area, and the blank area displays white light, thereby improving the display brightness. However, to achieve this effect, the blank area needs to be small enough so that the angle of the incident light is small enough to be close to the incident collimated light. If the blank area is too large, it will cause light to be incident at a larger angle, such as Figure 1 As shown in the blank area on the right side of the middle, after being reflected, the incident light at a large angle has a certain probability of being incident on the color resistance adjacent to the blank area, causing the brightness of the color resistance to increase relatively and causing a color cast problem.

[0029] In the above situation, on the one hand, when the display panel displays a single color, the color that is intended to be displayed may be deviated due to the large-angle light incident on the adjacent color block, that is, the color shift problem of mixed colors. For example, originally only red was intended to be displayed, but some blue light was included. On the other hand, due to this probabilistic situation, it is impossible to ensure that the intensity of the natural light incident on each color block is consistent after being reflected from each blank area, and the color is inconvenient to adjust, resulting in the problem of impure color shift.

[0030] Based on this, an embodiment of the present application provides a display panel. Figure 2 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application. 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 a plurality of color resists 13 and a plurality of black matrices 12, the black matrix is ​​arranged between adjacent color resists, a blank area 11 is arranged between adjacent color resists, the black matrix is ​​attached to the color resist side walls at both ends of the blank area, and a blank light-transmitting area is formed between the two black matrices in each blank area; the electronic paper layer includes a plurality of first transparent cavities 21 and a plurality of second transparent cavities 22, each of the first transparent cavities is stacked below the corresponding color resist, and each of the second transparent cavities is stacked below the corresponding blank area.

[0031] The color resist layer includes multiple color resists arranged horizontally, including red color resist (R), green color resist (G) and blue color resist (B) to achieve color display. A black matrix is ​​set between adjacent color resists, and the black matrix BM (Black Matrix) is also called a black matrix, which can be used for light shielding.

[0032] A blank area is provided between adjacent color blocks, and the black matrix is ​​attached to the side walls of the color blocks at both ends of the blank area to isolate the RGB color blocks to prevent mixing of different colors. A blank light-transmitting area is formed between the two black matrices in each blank area to allow part of the natural light to enter the electronic paper layer from the blank area. This embodiment reduces the area of ​​the blank area and improves the color deviation problem by adding BM shielding between the color blocks. At the same time, a blank light-transmitting area is left between the two BMs to ensure a certain display brightness improvement effect. After the light enters the blank area, it is refracted in the corresponding first transparent cavity and the second transparent cavity, which can make the light reflected to the adjacent color block more uniform and reduce the degree of color deviation.

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

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

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

[0036] In one implementation of this embodiment, the display panel further includes a reflective layer stacked below the electronic paper layer, and the reflective layer is used to reflect part of the natural light incident from the blank light-transmitting area to the color-resistance layer.

[0037] Reference Figure 3 A reflective layer 3 is also provided below the electronic paper layer. The reflective layer may include white charged particles. The white charged particles can reflect light. The reflective layer reflects the light incident to the bottom of the electronic paper layer outward. It is mainly used to reflect part of the natural light incident from the blank light-transmitting 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 color.

[0038] In this embodiment, a first reflective coating 31 is provided on the reflective layer, and a second reflective coating 221 is provided on the inner wall of one side of the second transparent cavity; 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 is reflected to the corresponding color group through the first transparent cavity.

[0039] Take the second reflective coating on the right inner wall of the second transparent cavity as an example for explanation. Figure 3 , natural light is incident on the right inner wall of the second transparent cavity from the blank light-transmitting area, and is reflected to the reflective layer based on the second reflective coating on the right inner wall of the second transparent cavity. The natural light is then reflected to the left side of the second transparent cavity based on the first reflective coating on the reflective layer. Then, the natural light is negatively refracted from the left side of the second transparent cavity to enter the bottom of the first transparent cavity, and is reflected to the top of the first transparent cavity by the reflective layer at the bottom of the first transparent cavity. Then, the natural light is positively refracted from the top of the first transparent cavity to enter the corresponding color group, presenting the color corresponding to the color resistance.

[0040] In this embodiment, part of the natural light incident from the blank light-transmitting area, when incident on one side (for example, the left side) of the second transparent cavity, can be directly refracted through the positive and negative refractive material interface on the left to the color resist on the left to exit; when incident on the other side (the right side) of the second transparent cavity, it is reflected by the reflective coating on the right and then incident on the positive and negative refractive material interface on the left again, and is also refracted to the color resist on the same side (i.e., the left side) to exit. Through the structure of this embodiment, the natural light from each blank area is emitted from the adjacent color resist on the same side as much as possible, and when displaying in monochrome, the color influence of other color resists is reduced, thereby reducing the occurrence of color deviation and improving the utilization rate of light.

[0041] If the second transparent cavity is set to be purely transparent, natural light is incident vertically from the blank light-transmitting area to the second transparent cavity, and after being reflected by the reflective layer at the bottom, it will be emitted vertically from the blank light-transmitting area. Therefore, the blank area appears white, and the entire display panel is prone to whitening. In this regard, in another implementation of this embodiment, the second transparent cavity is filled with scattering particles.

[0042] In this embodiment, scattering particles are filled in the second transparent cavity. After natural light enters the second transparent cavity from the blank light-transmitting area, it is dispersed by the scattering particles in the second transparent cavity, so that the natural light spreads to the surroundings, increasing the chance of light emitting from the color-resisting layer. Figure 3 , natural light is incident on the second transparent cavity and then dispersed by the scattering particles. When the scattered light is incident on both sides of the second transparent cavity, it can be directly negatively refracted from the second transparent cavity to the first transparent cavity, and then emitted from the corresponding color block. In this embodiment, by filling the second transparent cavity with scattering particles, the light emitted from the color block is increased, the color display purity and color saturation are improved, and the light utilization rate is improved, while the light emitted from the blank light-transmitting area is reduced, and the degree of whitening is reduced.

[0043] In this embodiment, scattering particles are filled in the second transparent cavity below the blank area. This structure can maximize the transmission of incident natural light from the color-resisting layer after being scattered and reflected, thereby improving light utilization.

[0044] In another implementation of the present embodiment, the cross-section of the black matrix along the direction of incidence of natural light is a trapezoidal structure or a triangular structure that is narrow at the top and wide at the bottom. The trapezoidal structure includes a side waist away from the color resist layer, and a third reflective coating 121 is provided on one surface of the black matrix side waist. The triangular structure includes a side edge away from the color resist layer, and a third reflective coating is provided on one surface of the black matrix side edge.

[0045] In order to prevent the natural light incident on the black matrix from being absorbed by the black matrix, so that the natural light cannot enter the electronic paper layer, the third reflective coating is set on the surface of the black matrix in this embodiment. When the natural light is incident on the black matrix, the third reflective coating on the surface of the black matrix is ​​reflected to the blank light-transmitting area and enters the electronic paper layer, thereby improving the utilization rate of light. In addition, the black matrix is ​​set to a structure with a narrow top and a wide bottom in this embodiment. The specific shape of the narrow top and a wide bottom can be selected according to actual needs, including but not limited to the following: Figure 3 The right triangle shown or Figure 5 The right-angled trapezoid shown in the figure, among which the right-angled triangle can increase more incident natural light, and the right-angled trapezoid can improve the shading effect and hinder color mixing. The upper narrow structure of the black matrix increases the incident range of external natural light, allowing natural light at a large angle to enter the display panel, thereby improving the overall display brightness of the display panel. The lower wide structure of the black matrix reduces the impact of reduced natural light utilization caused by light emitted from the blank light-transmitting area after natural light is reflected, which can further improve optical utilization.

[0046] In another implementation of this embodiment, the first transparent cavity includes 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 to one side of the first transparent cavity, so that the light refracted into the first transparent cavity from the other side 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, absorbing the light in the electronic paper layer, and the light cannot be emitted through the color resistance, and the display panel displays a dark state.

[0047] The first transparent cavity contains black charged particles, which are positively charged and can absorb light. A first control electrode 23 is set on one side (such as the left side) of the first transparent cavity, and a second control electrode 24 is set on the top of the first transparent cavity. The electrodes attract the black charged particles to the corresponding positions. Figure 3 As shown, when a negative voltage is applied to the first control electrode, the black charged particles are adsorbed on the left side of the first transparent cavity, so that the light refracted from the right side of the first transparent cavity and the light incident from the color resistor can be reflected to the color resistor above, and the display panel displays a bright state, which is the state of the display panel displaying a picture. Figure 4 As shown, when a negative voltage is applied to the second control electrode, the black charged particles are adsorbed on the top of the first transparent cavity, absorbing the light reflected in the electronic paper layer and blocking the light incident from the color block. The light cannot be emitted through the color block, and the display panel shows a dark state, which is the state in which the display panel is turned off and no picture is displayed.

[0048] External light is incident from the blank light-transmitting area, and after being reflected, it is highly likely to be emitted from the blank light-transmitting area again. Although the display brightness is improved, some external light components will be involved when displaying a single color or mixed colors. At this time, the displayed color purity is low and the saturation is not high. In this regard, in another implementation of this embodiment, the refractive indexes of the first transparent cavity and the second transparent cavity are different, and the cross-section of the second transparent cavity along the direction of the 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; the natural light passes through the blank light-transmitting area and is incident on one side of the second transparent cavity, refracted into the first transparent cavity, and reflected to the corresponding color group through the first transparent cavity.

[0049] like Figure 6 As shown, the natural light incident through the blank light-transmitting area will be incident on the left and right sides of the second transparent cavity (triangular light-transmitting portion), that is, the junction of the first transparent cavity and the second transparent cavity. At this time, the light incident on the left side will eventually be transmitted to the left color block for exit, and the light incident on the right side will eventually be transmitted to the right color block for exit. This embodiment uses an isosceles triangle structure to evenly distribute natural light to the left and right color blocks, so that the intensity of natural light evenly distributed to each color block is close to the same, avoiding the color deviation problem caused by uneven distribution of incident natural light in conventional blank designs, and the incident natural light will eventually be transmitted to the color blocks on both sides before exiting, which greatly reduces the light emitted from the blank area, and a higher purity color display can be achieved at this time.

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

[0051] In this embodiment, the refractive index n1 of the first transparent cavity is different from the refractive index n2 of the second transparent cavity, preferably, n1<n2. Figure 8 As shown in the optical path diagram of n1>n2, if n1>n2, part of the light goes from the second transparent cavity to the first transparent cavity, and the refracted light in the first transparent cavity has a larger angle, which will appear as shown in the figure. Figure 8 The phenomenon of light backflow shown in the figure, that is, natural light is reflected back into the second transparent cavity after passing through the reflective layer, and is finally absorbed by the upper black matrix, which will reduce the light utilization rate. Therefore, in this embodiment, the refractive index of the first transparent cavity is set to be smaller than the refractive index of the second transparent cavity, such as Figure 6 In the optical path schematic diagram of n1<n2 shown in the figure, part of the light is refracted from the second transparent cavity to the first transparent cavity, the refracted light angle in the first transparent cavity is smaller, and the natural light is reflected to the adjacent color resistance after passing through the reflective layer, further improving the light utilization rate.

[0052] In this embodiment, the display panel also includes a reflective layer stacked under the electronic paper layer, the reflective layer includes black charged particles and white charged particles, and a third control electrode is arranged under the reflective layer; when a positive voltage is applied to the third control electrode, the white charged particles are adsorbed to the reflective layer, reflect the light incident to 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 to the reflective layer, absorb the light incident to the electronic paper layer, and the display panel displays a dark state.

[0053] In this embodiment, the black charged particles and the white charged particles are placed in the bottom layer (i.e., the reflective layer), and their state transitions can be controlled by electrodes. The black particles are positively charged, and the white particles are negatively charged. A third control electrode is set below the reflective layer, and positive and negative voltages are applied to the electrode to attract the black charged particles or the white charged particles to the corresponding position. Figure 6 As shown, 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 resistance can be reflected to the color resistance above, and the display panel displays a bright state. Figure 7 As shown, when a negative voltage is applied to the third control electrode, the black charged particles are adsorbed to the reflective layer, absorbing the light incident to the electronic paper layer and the light incident from the color filter. The light cannot be emitted through the color filter, and the display panel shows a dark state.

[0054] Example 2

[0055] In this embodiment, a display device is also provided, and the display device includes a display panel as described above. For implementing the above embodiments and preferred implementations, what has been described will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for 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 conceivable.

[0056] It should be noted that the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0057] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

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

[0059] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0060] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0061] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0062] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0063] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a computer storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned computer storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or CD-ROM and other media that can store program codes.

[0064] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection 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 further includes a plurality of black matrices, the black matrices being attached to the color-resist sidewalls at both ends of the blank area, and a blank light-transmitting area is formed between two black matrices in each blank area; The electronic paper layer includes a plurality of first transparent cavities and a plurality of second transparent cavities, each of the first transparent cavities is stacked under a corresponding color resist, and each of the second transparent cavities is stacked under a corresponding blank area.

2. The display panel according to claim 1, characterized in that: The first transparent cavity is made of positive refractive material, and the second transparent cavity is made of negative refractive material, or the first transparent cavity is made of negative refractive material, and the second transparent cavity is made of positive refractive material.

3. The display panel according to claim 1, characterized in that: The display panel further includes a reflective layer stacked below the electronic paper layer, and the reflective layer is used to reflect part of the natural light incident from the blank light-transmitting area to the color-resistance layer.

4. The display panel according to claim 2, characterized in that: A first reflective coating is provided on the reflective layer, and a second reflective coating is provided on an inner wall of one side of the second transparent cavity; 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 is reflected to the corresponding color group through the first transparent cavity.

5. 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 structure or a triangular structure that is narrow at the top and wide at the bottom. The trapezoidal structure includes a side away from the color resist layer, and a third reflective coating is provided on one surface of the black matrix side. The triangular structure includes a side away from the color resist layer, and a third reflective coating is provided on one surface of the black matrix side.

6. The display panel according to claim 1, characterized in that: The first transparent cavity includes black charged particles, a first control electrode is disposed on one side of the first transparent cavity, and a second control electrode is disposed 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 to 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 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, absorbing the light in the electronic paper layer, and the display panel displays a dark state.

7. The display panel according to claim 1, characterized in that: The refractive indexes of the first transparent cavity and the second transparent cavity are different, and the cross-section of the second transparent cavity along the direction of the natural light incidence is in the shape of an inverted triangle, and two sides of the inverted triangle are the junctions of the first transparent cavity and the second transparent cavity; Natural light passes through the blank light-transmitting area and is incident on one side of the second transparent cavity, refracted into the first transparent cavity, and reflected to the corresponding color group through the first transparent cavity.

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

9. The display panel according to any one of claims 7 to 8, characterized in that: 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, reflecting the light incident to 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 to the reflective layer, absorbing the light incident to the electronic paper layer, and the display panel displays a dark state.

10. A display device, characterized in that: The display device comprises the display panel as described in claims 1 to 9 above.

Images