Electronic paper display panel, control method thereof, and display device

Abstract

The present application discloses an electronic paper display panel, its control method and a display device, mainly relating to the field of display technology. The electrophoretic reflection layer is disposed on the array substrate and on the side of the array substrate facing the filter substrate. The controllable light reflection layer, the color filter layer and the common electrode layer are sequentially disposed on the side of the filter substrate facing the array substrate; the color filter layer includes a plurality of sub-color resistors, each sub-color resistor is disposed at intervals, and the space between two adjacent sub-color resistors is defined as a color resistor gap, and the projection of the controllable light reflection layer is located on the color resistor gap; the common electrode layer can control the light irradiated onto the controllable light reflection layer to be reflected to the side of the color filter layer away from the filter substrate, or to be reflected to the side of the filter substrate away from the color filter layer. Through the above design, the brightness of the electronic paper display panel can be improved when the intensity of the external ambient light is weak, and the problem of bright line display can be avoided when the intensity of the external ambient light is high.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to an electronic paper display panel, a control method thereof, and a display device. Background Art

[0002] With the development of digital technologies, more and more display devices have entered people's lives, such as electronic paper (EP) display panels. Since electronic paper display panels can maintain the display for a long time when powered off and have the advantages of being light, thin, low power consumption, and simple in process, they are increasingly favored by people. With the urgent demand for color electronic paper display panels, adding a color film substrate structure to the existing electronic paper display panel is an important way to achieve color electronic paper display. However, after adding a color film substrate to the current electronic paper display panel, the brightness of the electronic paper display panel will decrease;

[0003] Therefore, a light reflection structure or a light guiding structure is adopted between sub-color resistors. However, when a light reflection structure is provided between sub-color resistors, a bright line problem will occur in the electronic paper display panel when the ambient light is relatively bright, and when a light guiding structure is provided between sub-color resistors, it is not conducive to improving the brightness of the electronic paper display panel when the ambient light is relatively dim. Summary of the Invention

[0004] The purpose of the present application is to provide an electronic paper display panel, a control method thereof, and a display device, which can improve the brightness of the electronic paper display panel when the intensity of external ambient light is weak and avoid the display problem of bright lines when the intensity of external ambient light is high.

[0005] The present application discloses an electronic paper display panel, which includes an array substrate, an electrophoretic reflection layer, a filter substrate, a controllable light reflection layer, a color filter layer, and a common electrode layer;

[0006] The array substrate and the filter substrate are disposed opposite to each other. The electrophoretic reflection layer is disposed on the array substrate and on the side of the array substrate facing the filter substrate. The controllable light reflection layer, the color filter layer, and the common electrode layer are sequentially disposed on the side of the filter substrate facing the array substrate;

[0007] The color filter layer includes a plurality of sub-color resistors, and each sub-color resistor is disposed at intervals. A color resistor gap is defined between two adjacent sub-color resistors, and the projection of the controllable light reflection layer is located in the color resistor gap;

[0008] The common electrode layer can control the light irradiated onto the controllable light reflection layer to be reflected toward the side of the color filter layer away from the filter substrate or toward the side of the filter substrate away from the color filter layer.

[0009] Optionally, particle channels are provided on the filter substrate. The controllable light reflection layer includes a plurality of white electrophoretic particles located within the particle channels, and the common electrode layer is used to control the up and down movement of the white electrophoretic particles.

[0010] Optionally, the particle channels include an opposite first inclined surface and second inclined surface. The angle between the first inclined surface and the surface of the filter substrate close to the array substrate is greater than 90°, and the angle between the second inclined surface and the surface of the filter substrate close to the array substrate is greater than 90°.

[0011] Optionally, the plurality of sub-color resists include a green color resist, a red color resist, and a blue color resist. The particle channel between the red color resist and the green color resist is defined as the first particle channel, the particle channel between the red color resist and the blue color resist is defined as the second particle channel, and the particle channel between the green color resist and the blue color resist is also defined as the second particle channel. The depth of the second particle channel is greater than the depth of the first particle channel.

[0012] The present application also discloses a control method for an electronic paper display panel. The control method for the electronic paper display panel is used to control the electronic paper display panel, and the steps of the control method for the electronic paper display panel include:

[0013] Detect the light intensity irradiated on the electronic paper display panel;

[0014] When the light intensity is higher than a preset intensity range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to the side of the color filter layer away from the filter substrate;

[0015] When the light intensity is lower than a preset intensity range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to the side of the filter substrate away from the color filter layer.

[0016] Optionally, the controllable light reflection layer includes a plurality of white electrophoretic particles. When the light intensity is higher than a preset intensity range, the step of the common electrode layer controlling the light irradiated on the controllable light reflection layer to be reflected to the side of the color filter layer away from the filter substrate includes:

[0017] When the light intensity is higher than a preset intensity range, the common electrode layer drives the white electrophoretic particles to move upward to control the light irradiated on the controllable light reflection layer to be reflected to the side of the color filter layer away from the filter substrate.

[0018] Optionally, when the light intensity is higher than the preset intensity range, the step of driving the white electrophoretic particles upward by the common electrode layer to control the light irradiated on the controllable light reflection layer to be reflected toward the side of the color filter layer away from the filter substrate includes:

[0019] When the light intensity is higher than the preset intensity range, obtain the display voltage of the pixel electrode;

[0020] Input a first preset voltage to the common electrode layer, and input a second preset voltage with a preset difference from the display voltage to the pixel electrode, keep the voltage difference between the pixel electrode and the common electrode layer within each pixel unit area unchanged, and drive the white electrophoretic particles upward, where the preset difference is a negative number.

[0021] Optionally, when the light intensity is lower than the preset intensity range, the step of the common electrode layer controlling the light irradiated on the controllable light reflection layer to be reflected toward the side of the filter substrate away from the color filter layer includes:

[0022] When the light intensity is lower than the preset intensity range, output a third preset voltage to the common electrode layer, drive the white electrophoretic particles downward, to control the light irradiated on the controllable light reflection layer to be reflected toward the side of the filter substrate away from the color filter layer;

[0023] Input the original working voltage to the common electrode layer.

[0024] Optionally, the steps of the control method of the electronic paper display panel further include:

[0025] Obtain the information of the display screen to obtain the average gray level of the display screen,

[0026] When the average gray level of the display screen is higher than the preset brightness range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected toward the side of the filter substrate away from the color filter layer;

[0027] When the average gray level of the display screen is lower than the preset brightness range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected toward the side of the color filter layer away from the filter substrate.

[0028] The present application also discloses a display device, the display device includes a detection module, a voltage control module and an electronic paper display panel, the detection module is used to detect the light intensity irradiated on the electronic paper display panel, the voltage control module is used to obtain the light intensity detected by the detection module, and judge whether it exceeds the preset intensity range, and control the voltage of the common electrode layer, and the detection module, the voltage control module and the electronic paper display panel are connected.

[0029] Compared with the existing electronic paper display panel, the electronic paper display panel of the present application is provided with a controllable light reflection layer at the position of the sub-color resist interval, and the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to the side of the color filter layer away from the filter substrate, or to the side of the filter substrate away from the color filter layer. In this way, when the ambient light intensity where the electronic paper display panel is located is low, the controllable light reflection layer can be controlled to act as a white color resist, directly reflecting light outward to improve the brightness of the electronic paper display panel; when the ambient light intensity where the electronic paper display panel is located is high, the light can be guided into the electronic paper display panel, thereby improving the color performance of the electronic paper display panel and avoiding the problem of bright lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, are used to illustrate the implementation manners of the present application, and are used to explain the principles of the present application together with the written description. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0031] Figure 1 is a schematic diagram of an electronic paper display panel according to the first embodiment of the present application;

[0032] Figure 2 is a schematic diagram of an array substrate according to the first embodiment of the present application;

[0033] Figure 3 is a plan view of a particle channel according to the first embodiment of the present application;

[0034] Figure 4 is a schematic diagram of a first particle channel and a second particle channel according to the first embodiment of the present application;

[0035] Figure 5 is a schematic diagram of a sub-color resist according to the first embodiment of the present application;

[0036] Figure 6 is a schematic diagram of a display device according to an embodiment of the present application;

[0037] Figure 7 is a schematic diagram of a control method of an electronic paper display panel according to an embodiment of the present application;

[0038] Figure 8 is a schematic diagram of a common electrode layer according to an embodiment of the present application;

[0039] Figure 9It is a schematic diagram of an electronic paper display panel according to the second embodiment of the present application;

[0040] Figure 10 It is a schematic diagram of an electronic paper display panel according to the third embodiment of the present application.

[0041] Among them, 10, display device; 20, detection module; 30, voltage control module; 40, control circuit board; 50, common electrode driving chip; 100, electronic paper display panel; 200, array substrate; 210, array substrate; 220, active switch layer; 221, data line; 222, scanning line; 223, active switch; 230, pixel electrode layer; 231, pixel electrode; 240, pixel unit area; 300, electrophoretic reflection layer; 400, light filtering substrate; 500, controllable light reflection layer; 510, particle channel; 511, first inclined surface; 512, second inclined surface; 521, first particle channel; 522, second particle channel; 530, base layer; 540, hemispherical groove; 550, partition wall; 560, white electrophoretic particles; 600, color filter layer; 610, sub-color resist; 611, first color resist part; 612, second color resist part; 620, color resist gap; 630, light channel; 641, green color resist; 642, red color resist; 643, blue color resist; 700, common electrode layer; 710, common electrode. Detailed implementation manners

[0042] It should be understood that the terms, the specific structures and functional details disclosed here are only for the purpose of describing specific embodiments, which are representative, but the present application can be specifically implemented in many alternative forms and should not be construed as being limited only to the embodiments set forth herein.

[0043] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating relative importance or implicitly indicating the quantity of the indicated technical features. Thus, unless otherwise specified, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; the meaning of "a plurality" is two or more. The term "comprising" and any deformation thereof means inclusive without exclusion, and there may be or be added one or more other features, integers, steps, operations, units, components and / or combinations thereof.

[0044] In addition, terms indicating orientation or positional relationships such as "center", "horizontal", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are described based on the orientation or relative positional relationships shown in the drawings, and are only for the sake of simplifying the description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0045] In addition, unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0046] The present application will be described in detail below with reference to the drawings and optional embodiments.

[0047] Embodiment 1:

[0048] Figure 1 is a schematic diagram of an electronic paper display panel according to a first embodiment of the present application. As Figure 1 shown, Figure 1 the direction indicated by the dashed arrow in the figure represents the propagation direction of part of the light. The present application discloses an electronic paper display panel 100, and the electronic paper display panel 100 includes an array substrate 200, an electrophoretic reflection layer 300, a light filtering substrate 400, a controllable light reflection layer 500, a color filter layer 600, and a common electrode layer 700.

[0049] The array substrate 200 and the light filtering substrate 400 are disposed opposite to each other. The electrophoretic reflection layer 300 is disposed on the array substrate 200 and on the side of the array substrate 200 facing the light filtering substrate 400. The controllable light reflection layer 500, the color filter layer 600, and the common electrode layer 700 are sequentially disposed on the side of the light filtering substrate 400 facing the array substrate 200.

[0050] The color filter layer 600 includes a plurality of sub-color resistors 610. Each sub-color resistor 610 is disposed at intervals, and a color resistor gap 620 is defined between two adjacent sub-color resistors 610. The projection of the controllable light reflection layer 500 is located on the color resistor gap 620. The common electrode layer 700 can control the light irradiated onto the controllable light reflection layer 500 to be reflected to the side of the color filter layer 600 away from the light filtering substrate 400, or to be reflected to the side of the light filtering substrate 400 away from the color filter layer 600.

[0051] Figure 2 is a schematic diagram of an array substrate according to a first embodiment of the present application. In combination with Figure 2 as shown, wherein the array substrate 200 includes an array substrate 210, an active switch layer 220, and a pixel electrode layer 230. The pixel electrode layer 230 includes a plurality of pixel electrodes 231. The active switch layer 220 includes a data line 221, a scan line 222, and an active switch 223. The data line 221 and the scan line 222 are arranged in a criss-cross manner and define a plurality of pixel unit regions 240. The gate of the active switch 223 is connected to the scan line 222, the source of the active switch 223 is connected to the data line 221, and the drain of the active switch 223 is connected to the pixel electrode 231. An active switch 223 and a pixel electrode 231 are disposed in each pixel unit region 240.

[0052] Exemplarily, the electrophoretic reflection layer 300 of the present application is a microcapsule structure, including a plurality of microcapsules. Each microcapsule is filled with black electrophoretic particles and white electrophoretic particles 560. An electric field is formed between the common electrode layer 700 and the pixel electrode 231 to drive the black electrophoretic particles and the white electrophoretic particles 560 in the microcapsules to move, so as to reflect light for displaying an image.

[0053] The present application detects the light intensity irradiated on the electronic paper display panel 100; then when the light intensity is higher than a preset intensity range, the common electrode layer 700 can be used to control the light irradiated on the controllable light reflection layer 500 to be reflected to the side of the color filter layer 600 away from the filter substrate 400; in this way, when the external ambient light intensity is relatively high, further reduce the color deviation at the edge position of the sub-color resistor 610, enhance the color saturation, improve the color performance of the electronic paper display panel 100, and also prevent the phenomenon of bright lines appearing at the gaps of the sub-color resistor 610 due to the direct external reflection of the controllable light reflection layer 500.

[0054] When the light intensity is lower than the preset intensity range, the common electrode layer 700 can be used to control the light irradiated on the controllable light reflection layer 500 to be reflected to the side of the filter substrate 400 away from the color filter layer 600. This is equivalent to adding a white color resistor, which can improve the display brightness of the electronic paper display panel 100 when the ambient light intensity is lower than the preset intensity range, so as to achieve brightness uniformity.

[0055] Compared with the existing electronic paper display panel, the electronic paper display panel 100 of the present application is provided with a controllable light reflection layer 500 at the position of the color resistor interval, and the common electrode layer 700 controls the light irradiated onto the controllable light reflection layer 500 to be reflected to the side of the color filter layer 600 away from the filter substrate 400, or to the side of the filter substrate 400 away from the color filter layer 600. In this way, when the ambient light intensity where the electronic paper display panel 100 is located is relatively low, the controllable light reflection layer 500 can be controlled to act as a white color resistor, directly reflecting light outward to increase the brightness of the electronic paper display panel 100; when the ambient light intensity where the electronic paper display panel 100 is located is relatively high, the light can be guided into the electronic paper display panel 100, thereby improving the color performance of the electronic paper display panel 100 and avoiding the problem of bright lines.

[0056] Exemplarily, the width of the color resistor gap 620 is equal to the width of the sub-color resistor 610. In this embodiment, the case where the controllable light reflection layer 500 is directly disposed in the filter substrate 400 is taken as an example for explanation. Particle channels 510 are provided on the filter substrate 400. The controllable light reflection layer 500 includes a plurality of white electrophoretic particles 560. The white electrophoretic particles 560 are located in the particle channels 510. The common electrode layer 700 is used to control the up and down movement of the white electrophoretic particles 560.

[0057] The white electrophoretic particles 560 are negatively charged. Therefore, by inputting positive electricity to the common electrode layer 700, the white electrophoretic particles 560 can be driven to move downward, and by inputting negative electricity to the common electrode layer 700, the white electrophoretic particles 560 can be driven to move upward. By providing particle channels 510 on the filter substrate 400 and then filling the channels with white electrophoretic particles 560, the reflection direction of the light irradiated onto the controllable light reflection layer 500 can be controlled by controlling the movement of the white electrophoretic particles 560. Moreover, by opening particle channels 510 on the filter substrate 400, the thickness of the electronic paper display panel 100 can be reduced, thereby reducing the attenuation of light.

[0058] The particle channels 510 include opposite first inclined surfaces 511 and second inclined surfaces 512. The included angle between the first inclined surface 511 and the surface of the filter substrate 400 close to the array substrate 200 is greater than 90°, and the included angle between the second inclined surface 512 and the surface of the filter substrate 400 close to the array substrate 200 is greater than 90°. Simply put, the cross-sectional shape of the particle channels 510 is triangular.

[0059] Preferably, the included angle between the first inclined surface 511 and the surface of the filter substrate 400 close to the array substrate 200 ranges from 115° to 135°, and the included angle between the second inclined surface 512 and the surface of the filter substrate 400 close to the array substrate 200 ranges from 115° to 135°. When the white electrophoretic particles 560 are attached to the first inclined surface 511 and the second inclined surface 512, most of the light can be prevented from being reflected onto the distant sub-color resist 610 after irradiating the white electrophoretic particles 560, thereby improving the color performance of the electronic paper display panel 100.

[0060] Figure 3 is a schematic plan view of a particle channel according to the first embodiment of the present application. As Figure 3 shown, a hemispherical groove 540 and a partition wall 550 are further provided on the filter substrate 400. The partition wall 550 separates the particle channel 510 and the hemispherical groove 540. The orthographic projection of the particle channel 510 is located between two adjacent sub-color resists 610, that is, at the color resist gap 620. The orthographic projection of the hemispherical groove 540 is located between four adjacent sub-color resists 610 arranged in a "tian" character shape. The shape of the hemispherical groove 540 is hemispherical, and the hemispherical groove 540 is also filled with white electrophoretic particles 560.

[0061] The method of providing the hemispherical groove 540 and the particle channel 510 on the filter substrate 400 can be to print the shapes of the hemispherical groove 540 and the particle channel 510 on one side of the master mold first, and then pour liquid PI on the master mold and wait for it to cool and demold.

[0062] When the ambient light intensity where the electronic paper display panel 100 is located is relatively high, the common electrode layer 700 is used to control the upward movement of the white electrophoretic particles 560. When the light irradiates the first inclined surface 511 and the second inclined surface 512 of the particle channel 510, it will be reflected onto the sub-color resists 610 on both sides of the particle channel 510. When the light irradiates the inner wall of the hemispherical groove 540, it will be reflected onto the sub-color resists 610 around the hemispherical groove 540, thereby avoiding the problem of bright spots or dark spots appearing at the intersection of the four sub-color resists 610.

[0063] See again Figure 1 , in the present application, the ratio of the space volume in each individual particle channel 510 to the total volume of the white electrophoretic particles 560 in the particle channel 510 is 3:2, and the ratio of the space volume in each individual hemispherical groove 540 to the total volume of the white electrophoretic particles 560 in the hemispherical groove 540 is 3:2. Under the action of the common electrode layer 700, the white electrophoretic particles 560 converge at the top ends of the particle channel 510 and the hemispherical groove 540.

[0064] In this way, the light irradiated perpendicular to the first inclined surface 511 and the second inclined surface 512 will not all be directly reflected to the outside. The light irradiated to the lower part of the particle channel 510 and the hemispherical groove 540 can directly pass through the particle channel 510 and the hemispherical groove 540 and enter the panel, thereby reducing light loss, further improving the color performance of the electronic paper display panel 100, and avoiding the problem of seeing bright lines when viewing at a large viewing angle.

[0065] Define the thickness of the filter substrate 400 as d1, the depth of the particle channel 510 and the hemispherical groove 540 as d2, the thickness of the electrophoretic reflection layer 300 as d3, and the width of the particle channel 510 as d4. It satisfies 0 < d2 ≤ 1 / 2 d1, 0 ≤ 1 / 2d4 ≤ 1 / 2d3, so as to control the reflection of external light while ensuring the strength of the filter substrate 400.

[0066] As Figure 4 shown, multiple sub-color resistors 610 of the present application include a green color resistor 641, a red color resistor 642, and a blue color resistor 643. Define the particle channel 510 between the red color resistor 642 and the green color resistor 641 as the first particle channel 521, define the particle channel 510 between the red color resistor 642 and the blue color resistor 643 as the second particle channel 522, and define the particle channel 510 between the green color resistor 641 and the blue color resistor 643 as the second particle channel 522 as well. The depth of the second particle channel 522 is greater than the depth of the first particle channel 521.

[0067] In this way, when the intensity of external light is relatively high, that is, when it exceeds the preset intensity range, the common electrode layer 700 controls the white electrophoretic particles 560 in the second particle channel 522 to move upward. When the light irradiates the white electrophoretic particles 560 in the second particle channel 522 beside the blue color resistor 643, most of the light will be reflected in the direction of the blue color resistor 643, thereby passing through the blue color resistor 643 and irradiating the electrophoretic reflection layer 300 below, thereby increasing the amount of light of the blue color resistor 643, balancing the characteristics of different color resistors with different light transmittance, and avoiding the problem of color deviation of the electronic paper display panel 100.

[0068] Figure 5 It is a schematic diagram of a sub-color resistor according to the first embodiment of the present application. As Figure 5As shown, in order to further improve the display brightness of the electronic paper display panel 100, a light channel 630 is also provided in the middle of each sub-color resistor 610. Specifically, the sub-color resistor 610 includes a first color resistor portion 611, a second color resistor portion 612, and a light channel 630. The light channel 630 is located between the first color resistor portion 611 and the second color resistor portion 612. The light channel 630 divides the sub-color resistor 610 into two parts, so that light can directly enter the electronic paper display panel 100 through the light channel 630, increasing the amount of light entering the electronic paper display panel 100, thereby improving the display brightness.

[0069] Exemplarily, the widths of the color resistor gaps 620, the first color resistor portion 611, and the second color resistor portion 612 are all equal. When the white electrophoresis particles 560 are located at the lower part of the particle channel 510, the white electrophoresis particles 560 can act as a white color resistor to improve the display brightness of the electronic paper display panel 100.

[0070] Figure 6 is a schematic diagram of a display device according to an embodiment of the present application. As Figure 6 shown, the present application also discloses a display device 10. The display device 10 includes a detection module 20, a voltage control module 30, and an electronic paper display panel 100. The detection module 20 is used to detect the light intensity irradiated on the electronic paper display panel 100. The voltage control module 30 is used to obtain the light intensity detected by the detection module 20, determine whether it exceeds a preset intensity range, and control the voltage of the common electrode layer 700. The detection module 20, the voltage control module 30, and the electronic paper display panel 100 are connected.

[0071] The voltage control module 30 can also control the voltage of the pixel electrode 231 at the same time. In this way, when the detection module 20 detects the light intensity irradiated on the electronic paper display panel 100, and then transmits the light intensity information to the voltage control module 30, the voltage control module 30 determines the relationship between the light intensity and the preset intensity range, so as to control only the voltage of the common electrode layer 700, or control the voltages of the common electrode layer 700 and the pixel electrode 231.

[0072] Among them, the detection module 20 can be provided on one side of the light-emitting surface of the electronic paper display panel 100 and in the non-display area. In this way, the detected light intensity is more accurate, and multiple detection modules 20 can be provided in the non-display area. The light intensities obtained by the detection modules 20 are aggregated, and the data with large differences are removed, and then the average value is calculated.

[0073] Figure 7 is a schematic diagram of a control method for an electronic paper display panel according to an embodiment of the present application. As Figure 7As shown in the figure, the present application also discloses a control method for an electronic paper display panel 100. The control method for the electronic paper display panel 100 is used to control the electronic paper display panel 100. The steps of the control method for the electronic paper display panel 100 include:

[0074] S1: Detect the light intensity irradiated on the electronic paper display panel;

[0075] S2: When the light intensity is higher than the preset intensity range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to the side of the color filter layer away from the filter substrate;

[0076] S3: When the light intensity is lower than the preset intensity range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to the side of the filter substrate away from the color filter layer.

[0077] Among them, detecting the light intensity irradiated on the electronic paper display panel 100 can be detected by the detection module 20. Exemplarily, the detection module 20 includes a light sensor for detecting the light intensity.

[0078] The preset intensity range value is stored in the voltage control module 30. By comparing the detected light intensity with the stored preset intensity range, when the detected light intensity is higher than the preset intensity range, a negative charge is applied to the common electrode layer 700, so that after the light irradiated on the controllable light reflection layer 500 is reflected, it passes through the sub-color resistor 610 and enters the electronic paper display panel 100; when the detected light intensity is lower than the preset intensity range, a positive charge is applied to the common electrode layer 700, so that the light irradiated on the controllable light reflection layer 500 is directly reflected out.

[0079] Compared with the existing electronic paper display panel, the electronic paper display panel 100 of the present application is provided with a controllable light reflection layer 500 at the position where the sub-color resistors 610 are spaced apart, and the common electrode layer 700 is used to control the light irradiated on the controllable light reflection layer 500 to be reflected to the side of the color filter layer 600 away from the filter substrate 400, or to the side of the filter substrate 400 away from the color filter layer 600. In this way, when the ambient light intensity of the electronic paper display panel 100 is low, the controllable light reflection layer 500 can be controlled to act as a white color resistor, directly reflecting light outward to improve the brightness of the electronic paper display panel 100; when the ambient light intensity of the electronic paper display panel 100 is high, the light can be guided into the electronic paper display panel 100, thereby improving the color performance of the electronic paper display panel 100, and the problem of bright lines will not occur.

[0080] Moreover, this application does not require additional electrodes for independently controlling the controllable light reflection layer 500. Instead, the common electrode layer 700 originally in the electronic paper display panel 100 is used to control the controllable light reflection layer 500 to direct light, making the structure of the electronic paper display panel 100 simpler.

[0081] Moreover, the voltage control module 30 can also obtain information about the display screen of the electronic paper display panel 100. Specifically, the display device 10 further includes a control circuit board 40. The voltage control module 30 is directly connected to the source driver chip inside the control circuit board 40 to obtain information about the display screen, thereby obtaining the average gray level of the screen.

[0082] For example, directly obtain the data voltage from the source driver chip, and evaluate the average gray level of the display screen through the average value of the data voltage.

[0083] S4: Obtain information about the display screen to obtain the average gray level of the display screen;

[0084] S5: When the average gray level of the display screen is higher than the preset brightness range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to the side of the filter substrate away from the color filter layer;

[0085] S6: When the average gray level of the display screen is lower than the preset brightness range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to the side of the color filter layer away from the filter substrate.

[0086] The preset brightness range is also pre-stored in the voltage control module 30. By obtaining the average gray level of the display screen of the electronic paper display panel 100 through the voltage control module 30, when the average gray level of the display screen is higher than the preset brightness range, the common electrode layer 700 controls the light irradiated on the controllable light reflection layer 500 to be reflected to the side of the filter substrate 400 away from the color filter layer 600. When the average gray level of the display screen is lower than the preset brightness range, the common electrode layer 700 controls the light irradiated on the controllable light reflection layer 500 to be reflected to the side of the color filter layer 600 away from the filter substrate 400.

[0087] Compared with the existing electronic paper display panel, the electronic paper display panel 100 of the present application is provided with a controllable light reflection layer 500 at the position where the sub-color resistors 610 are spaced apart, and the common electrode layer 700 controls the light irradiated onto the controllable light reflection layer 500 to be reflected to the side of the color filter layer 600 away from the filter substrate 400, or to the side of the filter substrate 400 away from the color filter layer 600. In this way, when the average gray level of the display screen of the electronic paper display panel 100 is higher than the preset brightness range, the controllable light reflection layer 500 can be controlled to act as a white color resistor to directly reflect light outward to increase the brightness of the electronic paper display panel 100; when the average gray level of the display screen of the electronic paper display panel 100 is lower than the preset brightness range, the light can be guided into the electronic paper display panel 100, thereby improving the color performance of the electronic paper display panel 100 and avoiding the problem of bright lines.

[0088] Specifically, the present application controls the reflection angle of light by controlling the position of the white electrophoretic particles 560. The controllable light reflection layer 500 includes a plurality of white electrophoretic particles 560. S2: When the light intensity is higher than the preset intensity range, the steps for the common electrode layer 700 to control the light irradiated onto the controllable light reflection layer 500 to be reflected to the side of the color filter layer 600 away from the filter substrate 400 include:

[0089] S21: When the light intensity is higher than the preset intensity range, the common electrode layer drives the white electrophoretic particles to move upward to control the light irradiated onto the controllable light reflection layer to be reflected to the side of the color filter layer away from the filter substrate.

[0090] Among them, when the common electrode layer 700 drives the white electrophoretic particles 560 to move upward, the voltage of only the common electrode layer 700 can be changed, or the voltages of both the common electrode layer 700 and the pixel electrode layer 230 can be changed simultaneously.

[0091] Preferably, by changing the voltages of both the common electrode layer 700 and the pixel electrode layer 230 simultaneously in the present application, while controlling the movement of the white electrophoretic particles 560 in the controllable light reflection layer 500, it is possible to avoid affecting the underlying electrophoretic reflection layer 300 and avoid problems such as abnormal images. Specifically as follows:

[0092] S21: When the light intensity is higher than the preset intensity range, the steps for the common electrode layer to drive the white electrophoretic particles to move upward to control the light irradiated onto the controllable light reflection layer to be reflected to the side of the color filter layer away from the filter substrate include:

[0093] S211: When the light intensity is higher than the preset intensity range, obtain the display voltage of the pixel electrode;

[0094] S212: Apply a first preset voltage to the common electrode layer, and apply a second preset voltage to the pixel electrode, the difference between which and the display voltage is a preset difference. Keep the voltage difference between the pixel electrode and the common electrode layer within each pixel unit area unchanged, and drive the white electrophoretic particles to move upward, where the preset difference is a negative number.

[0095] Among them, the voltage control module 30 can directly obtain the display voltage of the pixel electrode 231 in each pixel unit area 240 in the picture from the source driver chip in the control circuit board 40, and the display voltage is the operating voltage of the pixel electrode 231 under the current display panel.

[0096] Exemplarily, the original operating voltage of the common electrode 710 is +1V. In order to control the upward movement of the white electrophoretic particles 560, the first preset voltage is a negative voltage, the first preset voltage is -3V, and the preset difference is -4. In this way, when the display voltage of the pixel electrode 231 is +15V, the voltage control module 30 recharges the pixel electrode 231 with a second preset voltage of +11V; when the display voltage of the pixel electrode 231 is -15V, the voltage control module 30 recharges the pixel electrode 231 with the second preset voltage of -19V, so as to keep the voltage difference between the pixel electrode 231 and the common electrode layer 700 unchanged, and also realize the controllable upward movement of the white electrophoretic particles 560.

[0097] Since the voltage of the pixel electrode 231 is changed row by row, the present application also improves the common electrode layer 700. Figure 8 It is a schematic diagram of a common electrode layer according to an embodiment of the present application, as Figure 8 shown. The common electrode layer 700 includes multiple independent common electrodes 710. The length direction of each common electrode 710 is the same as the length direction of the scan line 222. The orthographic projection of each common electrode 710 covers a row of pixel electrodes 231 connected by a scan line 222, as well as a part of the particle channel 510 and a part of the hemispherical groove 540 between two longitudinally adjacent rows of pixel electrodes 231.

[0098] In the step of S212: Apply a first preset voltage to the common electrode layer, and apply a second preset voltage to the pixel electrode, the difference between which and the display voltage is a preset difference. Keep the voltage difference between the pixel electrode and the common electrode layer within each pixel unit area unchanged, and drive the white electrophoretic particles to move upward, where the preset difference is a negative number.

[0099] While inputting a second preset voltage with a preset difference from the display voltage to the pixel electrodes 231 in the same row, only a common electrode 710 that overlaps in projection with the pixel electrodes 231 in the same row is input with a first preset voltage, so as to ensure that the voltages of the common electrode 710 and the pixel electrodes 231 above and below the electrophoresis reflection layer 300 in the electronic paper display panel 100 change simultaneously, rather than directly changing the voltage of the entire common electrode 710, thus avoiding the phenomenon of abnormal images.

[0100] Exemplarily, the display device 10 further includes a common electrode driving chip 50. The common electrode driving chip 50 is connected to the common electrode 710, and the common electrode driving chip 50 controls the voltage input of the common electrode 710. While inputting a second preset voltage with a preset difference from the display voltage to the pixel electrodes 231 in the same row, only a common electrode 710 that overlaps in projection with the pixel electrodes 231 in the same row is input with a first preset voltage. The common electrode driving chip 50 can be directly disposed on the filter substrate 400. And the common electrode driving chip 50 is also connected to the Tcon chip in the control circuit board 40 to monitor the signal sent by the Tcon chip to the source driving chip, so as to realize that while inputting a second preset voltage with a preset difference from the display voltage to the pixel electrodes 231 in the same row, only a common electrode 710 that overlaps in projection with the pixel electrodes 231 in the same row is input with a first preset voltage.

[0101] S3: When the light intensity is lower than the preset intensity range, the step of the common electrode layer controlling the light irradiated onto the controllable light reflection layer to be reflected to the side of the filter substrate away from the color filter layer includes:

[0102] S311: When the light intensity is lower than the preset intensity range, output a third preset voltage to the common electrode layer to drive the white electrophoresis particles to move downward, so as to control the light irradiated onto the controllable light reflection layer to be reflected to the side of the filter substrate away from the color filter layer;

[0103] S312: Input the original working voltage to the common electrode layer.

[0104] When the light intensity is lower than the preset intensity range, since it is necessary to pull the white electrophoresis particles 560 originally in the particle channels 510 and the hemispherical grooves 540 to move downward, a positive charge needs to be output to the common electrode layer 700. The third preset voltage can be greater than the original working voltage or equal to the original working voltage.

[0105] Among them, when outputting the third preset voltage to the common electrode 710, the voltage of only the common electrode layer 700 can be changed. After the downward movement of the white electrophoretic particles 560 is completed under control, the original working voltage is input to the common electrode layer 700. In this way, it is not necessary to change the voltage of the pixel electrode 231, making it easier to control.

[0106] Of course, it is also possible that while outputting the third preset voltage to the common electrode layer 700, the fourth preset voltage is also output to the pixel electrode 231. Specifically:

[0107] S321: When the light intensity is lower than the preset intensity range, obtain the display voltage of the pixel electrode;

[0108] S322: Input the third preset voltage to the common electrode layer, and input the fourth preset voltage whose difference from the display voltage is a preset difference to the pixel electrode, keep the voltage difference between the pixel electrode and the common electrode layer within each pixel unit area unchanged, and drive the white electrophoretic particles to move downward. Among them, the preset difference is a positive number.

[0109] Among them, the voltage control module 30 can directly obtain the display voltage of the pixel electrode 231 of each pixel unit area 240 in the picture from the source driver chip inside the control circuit board 40.

[0110] Exemplarily, the original working voltage of the common electrode 710 is +1V. In order to control the downward movement of the white electrophoretic particles 560, the third preset voltage is a positive number. Exemplarily, the third preset voltage is +6V, and the preset difference is 5. In this way, when the display voltage of the pixel electrode 231 is +15V, the voltage control module 30 re-injects a voltage with a fourth preset voltage of +20V to the pixel electrode 231; when the display voltage of the pixel electrode 231 is -15V, the second preset voltage is -10V, so as to keep the voltage difference between the pixel electrode 231 and the common electrode layer 700 unchanged, and also achieve the controllable downward movement of the white electrophoretic particles 560.

[0111] Embodiment 2:

[0112] Figure 9 It is a schematic diagram of an electronic paper display panel according to the second embodiment of the present application, as Figure 9As shown, different from the first embodiment, in this embodiment, the controllable light reflection layer 500 is disposed between the filter substrate 400 and the color filter layer 600. Specifically, the controllable light reflection layer 500 includes a base layer 530 and a plurality of white electrophoretic particles 560. The base layer 530 is disposed between the filter substrate 400 and the color filter layer 600. A particle channel 510 is provided on the base layer 530. The white electrophoretic particles 560 are located within the particle channel 510. The common electrode layer 700 is used to control the up and down movement of the white electrophoretic particles 560. A hemispherical groove 540 and a partition wall 550 are also provided on the base layer 530. The partition wall 550 separates the particle channel 510 and the hemispherical groove 540. The orthographic projection of the particle channel 510 is located between two adjacent sub-color resistors 610, that is, at the color resistor gap 620. The orthographic projection of the hemispherical groove 540 is located between four adjacent sub-color resistors 610 arranged in a "tian" character shape. The shape of the hemispherical groove 540 is hemispherical, and the hemispherical groove 540 is also filled with white electrophoretic particles 560.

[0113] The base layer 530 of this embodiment includes an insulating material or a passivation layer material process. Compared with the solution of the first embodiment, in this embodiment, the process of providing the particle channel 510 and the hemispherical groove 540 on the base layer 530 is simpler, and there is no need to thicken the array substrate 210, nor will it damage the protection effect of the array substrate 210 on the electronic paper display panel 100.

[0114] Embodiment 3:

[0115] Figure 10 is a schematic diagram of an electronic paper display panel according to the third embodiment of the present application. As Figure 10 shown, different from the first embodiment, in this embodiment, the controllable light reflection layer 500 is disposed between the sub-color resistors 610. Specifically, the controllable light reflection layer 500 includes a base layer 530 and a plurality of white electrophoretic particles 560. The base layer 530 is disposed between the sub-color resistors 610. A particle channel 510 is provided on the base layer 530. The white electrophoretic particles 560 are located within the particle channel 510. The common electrode layer 700 is used to control the up and down movement of the white electrophoretic particles 560. A hemispherical groove 540 and a partition wall 550 are also provided on the base layer 530. The partition wall 550 separates the particle channel 510 and the hemispherical groove 540. The particle channel 510 is located between two adjacent sub-color resistors 610, that is, at the color resistor gap 620. The hemispherical groove 540 is located between four adjacent sub-color resistors 610 arranged in a "tian" character shape. The shape of the hemispherical groove 540 is hemispherical, and the hemispherical groove 540 is also filled with white electrophoretic particles 560.

[0116] The base layer 530 of this embodiment includes an insulating material or a passivation layer material process. Compared with the solution of the first embodiment, in this embodiment, by disposing the controllable light reflection layer 500 between the sub-color resists 610, the thickness of the electronic paper display panel 100 is reduced, and the light, after irradiating on the controllable light reflection layer 500, is reflected toward the sub-color resists 610 without passing through a very thick color resist, which can reduce the light loss and improve the brightness of the electronic paper display panel 100.

[0117] Moreover, and more importantly, there is no need to avoid the bright line problem that occurs when viewing from a large angle by reducing the number of white electrophoretic particles.

[0118] It should be noted that the limitations of the various steps involved in this solution, without affecting the implementation of the specific solution, do not determine the order of execution of the steps. The steps written in the front can be executed first, or can be executed later, or even can be executed simultaneously. As long as the solution can be implemented, it should be regarded as falling within the protection scope of this application.

[0119] It should be noted that the inventive concept of this application can form a very large number of embodiments, but the space of the application documents is limited and cannot list them all. Therefore, on the premise of no conflict, the above-described embodiments or the technical features can be combined arbitrarily to form new embodiments. After the combination of the embodiments or technical features, the original technical effect will be enhanced.

[0120] The above content is a further detailed description of this application in combination with specific optional implementation manners, and it cannot be determined that the specific implementation of this application is only limited to these descriptions. For those of ordinary skill in the technical field to which this application belongs, without departing from the concept of this application, several simple deductions or substitutions can still be made, and all should be regarded as falling within the protection scope of this application.

Claims

1. An electronic paper display panel, characterized in that, The electronic paper display panel includes an array substrate, an electrophoretic reflection layer, a filter substrate, a controllable light reflection layer, a color filter layer, and a common electrode layer; The array substrate and the filter substrate are disposed opposite to each other. The electrophoretic reflection layer is disposed on the array substrate and on a side of the array substrate facing the filter substrate. The controllable light reflection layer, the color filter layer, and the common electrode layer are sequentially disposed on a side of the filter substrate facing the array substrate; The color filter layer includes a plurality of sub-color resistors, and each of the sub-color resistors is disposed at intervals, defining a color resistor gap between two adjacent sub-color resistors. The projection of the controllable light reflection layer is located on the color resistor gap; the controllable light reflection layer includes a plurality of white electrophoretic particles, and the common electrode layer is used to control the up and down movement of the white electrophoretic particles. The common electrode layer can control the light irradiated on the controllable light reflection layer to be reflected to a side of the color filter layer away from the filter substrate, or to be reflected to a side of the filter substrate away from the color filter layer.

2. The electronic paper display panel according to claim 1, wherein Particle channels are provided on the filter substrate, and the white electrophoretic particles are located in the particle channels.

3. The electronic paper display panel according to claim 2, wherein, The particle channels include opposite first inclined surfaces and second inclined surfaces. The angle between the first inclined surface and a surface of the filter substrate close to the array substrate is greater than 90°, and the angle between the second inclined surface and a surface of the filter substrate close to the array substrate is greater than 90°.

4. The electronic paper display panel according to claim 3, wherein The plurality of sub-color resistors include a green color resistor, a red color resistor, and a blue color resistor. The particle channel between the red color resistor and the green color resistor is defined as a first particle channel, the particle channel between the red color resistor and the blue color resistor is defined as a second particle channel, and the particle channel between the green color resistor and the blue color resistor is also defined as a second particle channel. The depth of the second particle channel is greater than the depth of the first particle channel.

5. A control method for an electronic paper display panel, characterized in that, The control method of the electronic paper display panel is used to control the electronic paper display panel according to any one of claims 1-4 above. The steps of the control method of the electronic paper display panel include: Detecting the light intensity irradiated on the electronic paper display panel; When the light intensity is higher than a preset intensity range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to a side of the color filter layer away from the filter substrate; When the light intensity is lower than a preset intensity range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to a side of the filter substrate away from the color filter layer.

6. The control method of the electronic paper display panel according to claim 5, wherein The controllable light reflection layer includes a plurality of white electrophoretic particles. When the light intensity is higher than a preset intensity range, the step of the common electrode layer controlling the light irradiated on the controllable light reflection layer to be reflected to a side of the color filter layer away from the filter substrate includes: When the light intensity is higher than a preset intensity range, the common electrode layer drives the white electrophoretic particles to move upward to control the light irradiated on the controllable light reflection layer to be reflected to a side of the color filter layer away from the filter substrate.

7. The control method of the electronic paper display panel according to claim 6, characterized in that, The step of driving the white electrophoretic particles to move upward by the common electrode layer to control the light irradiated on the controllable light reflection layer to be reflected to the side away from the filter substrate of the color filter layer when the light intensity is higher than the preset intensity range includes: When the light intensity is higher than the preset intensity range, obtain the display voltage of the pixel electrode; Input a first preset voltage to the common electrode layer, and input a second preset voltage with a preset difference from the display voltage to the pixel electrode, keep the voltage difference between the pixel electrode and the common electrode layer within each pixel unit area unchanged, and drive the white electrophoretic particles to move upward, where the preset difference is a negative number.

8. The control method of the electronic paper display panel according to claim 6, wherein The step of controlling the light irradiated on the controllable light reflection layer to be reflected to the side away from the color filter layer of the filter substrate by the common electrode layer when the light intensity is lower than the preset intensity range includes: When the light intensity is lower than the preset intensity range, output a third preset voltage to the common electrode layer to drive the white electrophoretic particles to move downward to control the light irradiated on the controllable light reflection layer to be reflected to the side away from the color filter layer of the filter substrate; Input the original working voltage to the common electrode layer.

9. The control method of the electronic paper display panel according to claim 5, wherein The steps of the control method of the electronic paper display panel further include: Obtain the information of the display screen to obtain the average gray level of the display screen, When the average gray level of the display screen is higher than the preset brightness range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to the side away from the color filter layer of the filter substrate; When the average gray level of the display screen is lower than the preset brightness range, the common electrode layer controls the light irradiated on the controllable light reflection layer to be reflected to the side away from the filter substrate of the color filter layer.

10. A display device, characterized in that, The display device includes a detection module, a voltage control module, and an electronic paper display panel as described in any one of claims 1-4. The detection module is used to detect the light intensity irradiated on the electronic paper display panel. The voltage control module is used to obtain the light intensity detected by the detection module, judge whether it exceeds the preset intensity range, and control the voltage of the common electrode layer. The detection module, the voltage control module, and the electronic paper display panel are connected.

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