Electronic paper display panel, control method thereof and display device

Abstract

The invention discloses an electronic paper display panel, a control method of the electronic paper display panel and a display device, and mainly relates to the technical field of display. An electrophoretic reflection layer is arranged on an array substrate and located on the side, facing a filtering substrate, of the array substrate; the controllable light reflection layer, the color filter layer and the common electrode layer are sequentially arranged on the side, facing the array substrate, of the filter substrate. The color filter layer comprises a plurality of sub color resistors, the sub color resistors are arranged at intervals, a color resistor gap is defined between every two adjacent sub color resistors, and the projection of the controllable light reflection layer is located on the color resistor gaps; the common electrode layer can control light irradiated to the controllable light reflecting layer to be reflected to the side, away from the light filtering substrate, of the color light filtering layer or to the side, away from the color light filtering layer, of the light filtering substrate, and through the design, the brightness of the electronic paper display panel can be improved when the light intensity of the external environment is weak; when the light intensity of the external environment is high, the display problem of bright lines is avoided.

Description

Technical Field

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

[0002] With the development of digital technology, more and more display devices are entering people's lives, such as electronic paper (EP) electronic paper display panels. Since electronic paper display panels can maintain display for a long time in the case of power failure, and have the advantages of lightness, thinness, low power consumption, and simple process, they are becoming more and more popular. 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, but adding a color film substrate to the current electronic paper display panel will reduce the brightness of the electronic paper display panel; Therefore, a light reflecting structure or a light guiding structure is set between the sub-color resists. However, setting a light reflecting structure between the sub-color resists will cause the electronic paper display panel to have bright lines when the ambient light is bright, while setting a light guiding structure between the sub-color resists will not be conducive to improving the brightness of the electronic paper display panel when the ambient light is dark. Summary of the invention

[0003] The purpose of the present application is to provide an electronic paper display panel and a control method and a display device thereof, which can improve the brightness of the electronic paper display panel when the external ambient light intensity is weak and avoid the display problem of bright lines when the external ambient light intensity is high.

[0004] The present application discloses an electronic paper display panel, which includes an array substrate, an electrophoretic reflective layer, a filter substrate, a controllable light reflective layer, a color filter layer and a common electrode layer; The array substrate and the filter substrate are arranged opposite to each other, the electrophoretic reflective layer is arranged on the array substrate and is located on a side of the array substrate facing the filter substrate, and the controllable light reflective layer, the color filter layer and the common electrode layer are arranged in sequence on a side of the filter substrate facing the array substrate; The color filter layer includes a plurality of sub-color blocks, each of which is arranged at intervals, and a gap between two adjacent sub-color blocks is defined as a color block gap, and the projection of the controllable light reflection layer is located in the color block gap; The common electrode layer can control the light irradiated to 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.

[0005] Optionally, a particle channel is provided on the filter substrate, the controllable light reflection layer includes a plurality of white electrophoretic particles, the white electrophoretic particles are located in the particle channel, and the common electrode layer is used to control the up and down movement of the white electrophoretic particles.

[0006] Optionally, the particle channel includes a first inclined surface and a second inclined surface relative to each other, 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°.

[0007] Optionally, the multiple sub-color resists include green color resist, red color resist and blue color resist, and the particle channel between the red color resist and the green color resist is defined as a first particle channel, the particle channel between the red color resist and the blue color resist is defined as a second particle channel, and the particle channel between the green color resist and the blue color resist is also defined as a second particle channel, and the depth of the second particle channel is greater than the depth of the first particle channel.

[0008] The present application also discloses a control method for an electronic paper display panel, the control method for an electronic paper display panel is used to control the electronic paper display panel, and the steps of the control method for an electronic paper display panel include: Detecting the intensity of light irradiated onto the electronic paper display panel; When the light intensity is higher than a preset intensity range, the common electrode layer controls the light irradiated to the controllable light reflection layer to be reflected toward the 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 onto the controllable light reflection layer to be reflected toward the side of the filter substrate away from the color filter layer.

[0009] Optionally, the controllable light reflecting layer includes a plurality of white electrophoretic particles, and when the light intensity is higher than a preset intensity range, the step of controlling the common electrode layer to reflect the light irradiated onto the controllable light reflecting layer toward a side of the color filter layer away from the filter substrate comprises: When the light intensity is higher than a preset intensity range, the common electrode layer drives the white electrophoretic particles to move upward, so as to control the light irradiated to the controllable light reflection layer to be reflected toward the side of the color filter layer away from the filter substrate.

[0010] Optionally, 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 to the controllable light reflection layer to be reflected toward the side of the color filter layer away from the filter substrate, comprising: When the light intensity is higher than a preset intensity range, obtaining a display voltage of the pixel electrode; A first preset voltage is input to the common electrode layer, and a second preset voltage having a preset difference with the display voltage is input to the pixel electrode, so as to keep the voltage difference between the pixel electrode and the common electrode layer in each pixel unit area unchanged, and drive the white electrophoretic particles to move upward, wherein the preset difference is a negative number.

[0011] Optionally, when the light intensity is lower than a preset intensity range, the step of controlling the common electrode layer to reflect the light irradiated onto the controllable light reflection layer toward a side of the filter substrate away from the color filter layer comprises: When the light intensity is lower than the preset intensity range, a third preset voltage is output to the common electrode layer to drive the white electrophoretic particles to move downward, so as to control the light irradiated to the controllable light reflection layer to be reflected toward the side of the filter substrate away from the color filter layer; An original working voltage is input to the common electrode layer.

[0012] Optionally, the method for controlling the electronic paper display panel further includes: Get the information of the displayed image and get the average grayscale of the displayed image. When the average grayscale of the displayed image is higher than a preset brightness range, the common electrode layer controls the light irradiated onto the controllable light reflection layer to be reflected toward a side of the filter substrate away from the color filter layer; When the average grayscale of the displayed image is lower than a preset brightness range, the common electrode layer controls 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.

[0013] The present application also discloses a display device, which includes a detection module, a voltage control module and an electronic paper display panel. The detection module is used to detect the intensity of light irradiated on the electronic paper display panel. The voltage control module is used to obtain the light intensity detected by the detection module and determine whether it exceeds a 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.

[0014] Compared with the existing electronic paper display panel, the electronic paper display panel of the present application sets a controllable light reflection layer at the position of the sub-color block interval, and controls the light irradiated to the controllable light reflection layer to be reflected toward 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, through the common electrode layer. In this way, when the ambient light intensity of the electronic paper display panel is low, the controllable light reflection layer can be controlled to act as a white color block, and directly reflect light outward to increase the brightness of the electronic paper display panel; when the ambient light intensity of the electronic paper display panel 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 the problem of bright lines will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings: Figure 1 is a schematic diagram of an electronic paper display panel according to the first embodiment of the present application; Figure 2 is a schematic diagram of an array substrate according to the first embodiment of the present application; Figure 3 is a schematic plan view of a particle channel of the first embodiment of the present application; Figure 4 is a schematic diagram of a first particle channel and a second particle channel of the first embodiment of the present application; Figure 5 is a schematic diagram of a sub-color resist of the first embodiment of the present application; Figure 6 is a schematic diagram of a display device according to an embodiment of the present application; Figure 7 is a schematic diagram of a control method of an electronic paper display panel according to an embodiment of the present application; Figure 8 is a schematic diagram of a common electrode layer according to an embodiment of the present application; Fig. 9 is a schematic diagram of an electronic paper display panel according to a second embodiment of the present application; Fig.10 It is a schematic diagram of an electronic paper display panel of the third embodiment of the present application.

[0016] 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, filter substrate; 500, controllable light reflection layer; 510, particle groove channel; 511, first inclined surface; 512, second inclined surface; 521, first particle channel; 522, second particle channel; 530, base layer; 540, hemispherical groove; 550, barrier wall; 560, white electrophoretic particle; 600, color filter layer; 610, sub-color resistance; 611, first color resistance part; 612, second color resistance part; 620, color resistance gap; 630, light channel; 641, green color resistance; 642, red color resistance; 643, blue color resistance; 700, common electrode layer; 710, common electrode. DETAILED DESCRIPTION

[0017] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0018] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "plurality" means two or more. The term "including" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may exist or be added.

[0019] In addition, terms indicating orientation or positional relationships, such as “center,” “lateral,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside,” are described based on the orientation or relative positional relationships shown in the accompanying drawings and are merely simplified descriptions for the convenience of describing the present application. They do not indicate that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present application.

[0020] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0022] Embodiment 1: Figure 1 is a schematic diagram of an electronic paper display panel according to the first embodiment of the present application. Figure 1 As shown, Figure 1 The direction indicated by the dashed arrow represents the propagation direction of part of the light. The present application discloses an electronic paper display panel 100, which includes an array substrate 200, an electrophoretic reflection layer 300, a filter substrate 400, a controllable light reflection layer 500, a color filter layer 600 and a common electrode layer 700.

[0023] The array substrate 200 and the filter substrate 400 are arranged opposite to each other, the electrophoretic reflective layer 300 is arranged on the array substrate 200 and is located on the side of the array substrate 200 facing the filter substrate 400, and the controllable light reflective layer 500, the color filter layer 600 and the common electrode layer 700 are arranged in sequence on the side of the filter substrate 400 facing the array substrate 200.

[0024] The color filter layer 600 includes a plurality of sub-color resists 610, each of which is arranged at intervals, and a color resist gap 620 is defined between two adjacent sub-color resists 610, and the projection of the controllable light reflecting layer 500 is located on the color resist gap 620; the common electrode layer 700 can control the light irradiated to the controllable light reflecting layer 500 to be reflected toward the side of the color filter layer 600 away from the filter substrate 400, or to be reflected toward the side of the filter substrate 400 away from the color filter layer 600.

[0025] Figure 2 is a schematic diagram of an array substrate according to the first embodiment of the present application, Figure 2As shown, 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 areas 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, the drain of the active switch 223 is connected to the pixel electrode 231, and each of the pixel unit areas 240 is provided with an active switch 223 and a pixel electrode 231.

[0026] Exemplarily, the electrophoretic reflective layer 300 of the present application is a microcapsule structure, including a plurality of microcapsules, each of which 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 the picture.

[0027] The present application detects the intensity of light irradiated onto 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 onto the controllable light reflection layer 500 to be reflected toward the side of the color filter layer 600 away from the filter substrate 400; in this way, when the intensity of the external ambient light is high, the color deviation at the edge of the sub-color resist 610 can be further reduced, the color saturation can be enhanced, and the color performance of the electronic paper display panel 100 can be improved, and the controllable light reflection layer 500 can be prevented from directly reflecting light outwards, resulting in the phenomenon of bright lines appearing at the gaps between the sub-color resists 610.

[0028] When the light intensity is lower than a preset intensity range, the common electrode layer 700 can be used to control the light irradiated to the controllable light reflecting layer 500 to be reflected toward the side of the filter substrate 400 away from the color filter layer 600. This is equivalent to adding a white color resistance, which can increase the display brightness of the electronic paper display panel 100 when the ambient light intensity is lower than the preset intensity range to achieve brightness uniformity.

[0029] Compared with the existing electronic paper display panel, the electronic paper display panel 100 of the present application sets a controllable light reflection layer 500 at the position of the color block interval, and controls the light irradiated to the controllable light reflection layer 500 to be reflected toward the side of the color filter layer 600 away from the filter substrate 400, or to be reflected toward the side of the filter substrate 400 away from the color filter layer 600 through the common electrode layer 700. 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 block, and the light can be directly reflected outward to increase 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.

[0030] Exemplarily, the width of the color block gap 620 is equal to the width of the sub-color block 610. This embodiment is explained by taking the example that the controllable light reflecting layer 500 is directly set in the filter substrate 400. A particle channel 510 is set on the filter substrate 400. The controllable light reflecting layer 500 includes a plurality of white electrophoretic particles 560. The white electrophoretic particles 560 are located in the particle channel 510. The common electrode layer 700 is used to control the up and down movement of the white electrophoretic particles 560.

[0031] The white electrophoretic particles 560 are negatively charged, so the white electrophoretic particles 560 can be driven to move downward by inputting positive electricity into the common electrode layer 700, and can be driven to move upward by inputting negative electricity into the common electrode layer 700. By setting a particle channel 510 on the filter substrate 400 and then filling the white electrophoretic particles 560 in the channel, the direction of reflection of light irradiated on the controllable light reflection layer 500 can be controlled by controlling the movement of the white electrophoretic particles 560. In addition, by opening the particle channel 510 on the filter substrate 400, the thickness of the electronic paper display panel 100 can be reduced, thereby reducing the attenuation of light.

[0032] The particle channel 510 includes a first inclined surface 511 and a second inclined surface 512 opposite to each other, wherein the angle between the first inclined surface 511 and a surface of the filter substrate 400 close to the array substrate 200 is greater than 90°, and the angle between the second inclined surface 512 and a surface of the filter substrate 400 close to the array substrate 200 is greater than 90°. In short, the cross-sectional shape of the particle channel 510 is triangular.

[0033] Preferably, the angle between the first inclined surface 511 and the side of the filter substrate 400 close to the array substrate 200 is in the range of 115°-135°, and the angle between the second inclined surface 512 and the side of the filter substrate 400 close to the array substrate 200 is in the range of 115°-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 on the distant sub-color resist 610 after being irradiated by the white electrophoretic particles 560, thereby improving the color performance of the electronic paper display panel 100.

[0034] Figure 3 is a schematic plan view of a particle channel of the first embodiment of the present application, such as Figure 3 As shown, a hemispherical groove 540 and a barrier wall 550 are also provided on the filter substrate 400. The barrier 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 blocks 610, that is, at the color block gap 620. The orthographic projection of the hemispherical groove 540 is located between four adjacent sub-color blocks 610 arranged in a field shape. The hemispherical groove 540 is hemispherical in shape, and the hemispherical groove 540 is also filled with white electrophoretic particles 560.

[0035] The method of setting the hemispherical groove 540 and the particle channel 510 on the filter substrate 400 is to first print the shape of the hemispherical groove 540 and the particle channel 510 on one side of the master mold, and then pour liquid PI liquid on the master mold, wait for cooling and then demold.

[0036] In this way, when the ambient light intensity of the electronic paper display panel 100 is high, the common electrode layer 700 is used to control the white electrophoretic particles 560 to move upward, and when the light is irradiated on the first inclined surface 511 and the second inclined surface 512 of the particle channel 510, it will be reflected on the sub-color resists 610 on both sides of the particle channel 510, and when the light is irradiated on the inner wall of the hemispherical groove 540, it will be reflected on 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.

[0037] See also Figure 1 In the present application, the ratio of the spatial volume within each individual particle channel 510 to the total volume of the white electrophoretic particles 560 within the particle channel 510 is 3:2, and the ratio of the spatial volume within each individual hemispherical groove 540 to the total volume of the white electrophoretic particles 560 within the hemispherical groove 540 is 3:2. Under the action of the common electrode layer 700, the white electrophoretic particles 560 are gathered at the top ends of the particle channel 510 and the hemispherical groove 540.

[0038] In this way, the light irradiated perpendicularly to the first inclined surface 511 and the second inclined surface 512 will not be directly reflected to the outside. The light irradiated to the particle channel 510 and the lower part of the hemispherical groove 540 can directly pass through the particle channel 510 and the hemispherical groove 540 to enter the surface, 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 viewed at a wide viewing angle.

[0039] The thickness of the filter substrate 400 is defined as d1, the depth of the particle channel 510 and the hemispherical groove 540 is defined as d2, the thickness of the electrophoretic reflective layer 300 is defined as d3, the width of the particle channel 510 is defined as d4, and 0< d2 ≤1 / 2 d1, 0≤1 / 2d4≤1 / 2d3, thereby controlling and guiding the reflection of external light while ensuring the strength of the filter substrate 400.

[0040] like Figure 4 As shown, the multiple sub-color resists 610 of the present application include a green color resist 641, a red color resist 642 and a blue color resist 643, and the particle channel 510 between the red color resist 642 and the green color resist 641 is defined as a first particle channel 521, and the particle channel 510 between the red color resist 642 and the blue color resist 643 is defined as a second particle channel 522, and the particle channel 510 between the green color resist 641 and the blue color resist 643 is also defined as a second particle channel 522, and the depth of the second particle channel 522 is greater than the depth of the first particle channel 521.

[0041] In this way, when the intensity of external light is high, that is, 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 is irradiated to the white electrophoretic particles 560 in the second particle channel 522 next to the blue color resist 643, most of the light will be reflected in the direction of the blue color resist 643, thereby passing through the blue color resist 643 and irradiating the electrophoretic reflective layer 300 below, thereby increasing the amount of light in the blue color resist 643, balancing the different light transmittance characteristics of different color resists, and avoiding the problem of color deviation of the electronic paper display panel 100.

[0042] Figure 5 is a schematic diagram of a sub-color resist of the first embodiment of the present application, such as Figure 5As shown, in order to further improve the display brightness of the electronic paper display panel 100, the present application further sets a light channel 630 in the middle of each sub-color resist 610. Specifically, the sub-color resist 610 includes a first color resist portion 611, a second color resist portion 612 and a light channel 630. The light channel 630 is located between the first color resist portion 611 and the second color resist portion 612. The light channel 630 divides the sub-color resist 610 into two, so that light can directly enter the electronic paper display panel 100 through the light channel 630, thereby increasing the amount of light entering the electronic paper display panel 100, thereby improving the display brightness.

[0043] Exemplarily, the width of the color resist gap 620 , the width of the first color resist portion 611 , and the width of the second color resist portion 612 are all equal. When the white electrophoretic particle 560 is located at the lower part of the particle channel 510 , the white electrophoretic particle 560 can act as a white color resist to improve the display brightness of the electronic paper display panel 100 .

[0044] Figure 6 is a schematic diagram of a display device according to an embodiment of the present application. Figure 6 As shown, the present application also discloses a display device 10, which 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 intensity of light irradiated onto the electronic paper display panel 100, and the voltage control module 30 is used to obtain the light intensity detected by the detection module 20, and 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.

[0045] The voltage control module 30 can also control the voltage of the pixel electrode 231 at the same time, so that the detection module 20 detects the intensity of light 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, thereby only controlling the voltage of the common electrode layer 700, or controlling the voltage of the common electrode layer 700 and the pixel electrode 231.

[0046] Among them, the detection module 20 can be set on one side of the light emitting surface of the electronic paper display panel 100 and in the non-display area, so that the detected light intensity is more accurate, and multiple detection modules 20 can be set in the non-display area, the light intensity obtained by the detection module 20 is summarized and the data with large differences are removed, and then the average is calculated.

[0047] Figure 7 is a schematic diagram of a control method of an electronic paper display panel according to an embodiment of the present application. Figure 7As shown, the present application also discloses a control method of an electronic paper display panel 100, the control method of the electronic paper display panel 100 is used to control the electronic paper display panel 100, and the steps of the control method of the electronic paper display panel 100 include: S1: Detect the intensity of light irradiated onto the electronic paper display panel; S2: when the light intensity is higher than a preset intensity range, the common electrode layer controls the light irradiated onto the controllable light reflection layer to be reflected toward a side of the color filter layer away from the filter substrate; S3: When the light intensity is lower than a preset intensity range, the common electrode layer controls the light irradiated onto the controllable light reflection layer to be reflected toward the side of the filter substrate away from the color filter layer.

[0048] The intensity of the light irradiated onto the electronic paper display panel 100 may be detected by the detection module 20 . Exemplarily, the detection module 20 includes a light sensor for detecting the intensity of the light.

[0049] The voltage control module 30 stores a preset intensity range value. By comparing the detected light intensity with the stored preset intensity range, when the detected light intensity is higher than the preset intensity range, negative electricity is passed through the common electrode layer 700, so that the light irradiated to the controllable light reflection layer 500 is reflected and passes through the sub-color resistor 610 to enter the electronic paper display panel 100; when the detected light intensity is lower than the preset intensity range, positive electricity is passed through the common electrode layer 700, so that the light irradiated to the controllable light reflection layer 500 is directly reflected out.

[0050] Compared with the existing electronic paper display panel, the electronic paper display panel 100 of the present application sets a controllable light reflection layer 500 at the position between the sub-color resists 610, and controls the light irradiated to the controllable light reflection layer 500 to be reflected toward the side of the color filter layer 600 away from the filter substrate 400, or to be reflected toward the side of the filter substrate 400 away from the color filter layer 600, through the common electrode layer 700. In this way, when the intensity of the ambient light in which the electronic paper display panel 100 is located is low, the controllable light reflection layer 500 can be controlled to act as a white color resist, and the brightness of the electronic paper display panel 100 can be increased by directly reflecting the light outward; when the intensity of the ambient light in which the electronic paper display panel 100 is located 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.

[0051] Moreover, the present application does not need to add an electrode to independently control the controllable light reflecting layer 500, but uses the existing common electrode layer 700 in the electronic paper display panel 100 to control the controllable light reflecting layer 500 to guide light, making the structure of the electronic paper display panel 100 simpler.

[0052] 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 also includes a control circuit board 40. The voltage control module 30 is directly connected to the source driver chip in the control circuit board 40 to obtain information about the display screen, thereby obtaining the average grayscale of the screen.

[0053] For example, the data voltage is directly obtained from the source driver chip, and the average grayscale of the display screen is evaluated by the average of the data voltage.

[0054] S4: Acquire information of the display image and obtain the average grayscale of the display image; S5: When the average grayscale of the displayed image is higher than a preset brightness range, the common electrode layer controls the light irradiated onto the controllable light reflection layer to be reflected toward a side of the filter substrate away from the color filter layer; S6: When the average grayscale of the displayed image is lower than a preset brightness range, the common electrode layer controls the light irradiated onto the controllable light reflection layer to be reflected toward a side of the color filter layer away from the filter substrate.

[0055] The preset brightness range is also pre-stored in the voltage control module 30. The average grayscale of the display screen of the electronic paper display panel 100 is obtained through the voltage control module 30. Then, when the average grayscale of the display screen is higher than the preset brightness range, the common electrode layer 700 controls the light irradiated to the controllable light reflection layer 500 to be reflected toward the side of the filter substrate 400 away from the color filter layer 600. When the average grayscale of the display screen is lower than the preset brightness range, the common electrode layer 700 controls the light irradiated to the controllable light reflection layer 500 to be reflected toward the side of the color filter layer 600 away from the filter substrate 400.

[0056] Compared with the existing electronic paper display panel, the electronic paper display panel 100 of the present application sets a controllable light reflection layer 500 at the position between the sub-color resists 610, and controls the light irradiated to the controllable light reflection layer 500 to be reflected toward the side of the color filter layer 600 away from the filter substrate 400, or to be reflected toward the side of the filter substrate 400 away from the color filter layer 600 through the common electrode layer 700. In this way, when the average grayscale 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 resist, and directly reflect the light outward to increase the brightness of the electronic paper display panel 100; when the average grayscale 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 the problem of bright lines will not occur.

[0057] Specifically, the present application controls the reflection angle of light by controlling the position of the white electrophoretic particles 560, the controllable light reflecting layer 500 includes a plurality of white electrophoretic particles 560, S2: when the light intensity is higher than a preset intensity range, the common electrode layer 700 controls the light irradiated to the controllable light reflecting layer 500 to reflect toward the side of the color filter layer 600 away from the filter substrate 400, the step includes: S21: When the light intensity is higher than a preset intensity range, the common electrode layer drives the white electrophoretic particles to move upward, so as to control the light irradiated onto the controllable light reflection layer to be reflected toward a side of the color filter layer away from the filter substrate.

[0058] When the common electrode layer 700 drives the white electrophoretic particles 560 to move upward, only the voltage of the common electrode layer 700 may be changed, or the voltages of the common electrode layer 700 and the pixel electrode layer 230 may be changed simultaneously.

[0059] Preferably, the present application can control the movement of the white electrophoretic particles 560 of the controllable light reflective layer 500 by simultaneously changing the voltage of the common electrode layer 700 and the pixel electrode layer 230, thereby avoiding affecting the electrophoretic reflective layer 300 below and avoiding the problem of abnormal images. The details are as follows: S21: 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 to the controllable light reflection layer to be reflected toward the side of the color filter layer away from the filter substrate, comprising: S211: when the light intensity is higher than a preset intensity range, obtaining a display voltage of the pixel electrode; S212: Input a first preset voltage to the common electrode layer, and input a second preset voltage to the pixel electrode, the voltage difference between the pixel electrode and the common electrode layer in each pixel unit area being a preset difference, and drive the white electrophoretic particles to move upward, wherein the preset difference is a negative number.

[0060] 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 in the control circuit board 40 , and the display voltage is the working voltage of the pixel electrode 231 under the current display panel.

[0061] Exemplarily, the original working 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 second preset voltage of +11V is re-charged into the pixel electrode 231 through the voltage control module 30; when the display voltage of the pixel electrode 231 is -15V, the second preset voltage of -19V is re-charged into the pixel electrode 231 through the voltage control module 30, thereby keeping the voltage difference between the pixel electrode 231 and the common electrode layer 700 unchanged, and also realizing the controllable upward movement of the white electrophoretic particles 560.

[0062] 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 is a schematic diagram of a common electrode layer in one embodiment of the present application, such as Figure 8 As shown, the common electrode layer 700 includes a plurality of independent common electrodes 710, the length direction of each common electrode 710 is consistent with the length direction of the scanning line 222, and the orthographic projection of each common electrode 710 covers a row of pixel electrodes 231 connected to a scanning line 222 and covers part of the particle channel 510 and part of the hemispherical groove 540 between two vertically adjacent rows of pixel electrodes 231.

[0063] S212: Input a first preset voltage to the common electrode layer, and input a second preset voltage to the pixel electrode whose difference with the display voltage is a preset difference, so as to keep the voltage difference between the pixel electrode and the common electrode layer in each pixel unit area unchanged, and drive the white electrophoretic particles to move upward, wherein the preset difference is a negative number.

[0064] While inputting a second preset voltage having a preset difference with the display voltage to the pixel electrodes 231 in the same row, inputting a first preset voltage only to a common electrode 710 overlapping with the projection of the pixel electrodes 231 in the same row, thereby ensuring that the voltages of the common electrodes 710 and the pixel electrodes 231 above and below the electrophoretic reflective layer 300 in the electronic paper display panel 100 change simultaneously, rather than directly changing the voltage of the entire common electrode 710, thereby avoiding abnormal screen images.

[0065] For example, the display device 10 further includes a common electrode driver chip 50, which is connected to the common electrode 710. The common electrode driver chip 50 controls the voltage input of the common electrode 710, and inputs the first preset voltage to only one common electrode 710 whose projection overlaps with the pixel electrodes 231 in the same row while inputting the second preset voltage whose difference with the display voltage is the preset difference to the pixel electrodes 231 in the same row. The common electrode driver chip 50 can be directly disposed on the filter substrate 400. In addition, the common electrode driver chip 50 is also connected to the Tcon chip in the control circuit board 40, and monitors the signal from the Tcon chip to the source driver chip, so as to realize that while inputting the second preset voltage whose difference with the display voltage is the preset difference to the pixel electrodes 231 in the same row, only inputting the first preset voltage to only one common electrode 710 whose projection overlaps with the pixel electrodes 231 in the same row.

[0066] S3: When the light intensity is lower than a preset intensity range, the common electrode layer controls the light irradiated to the controllable light reflection layer to be reflected toward the side of the filter substrate away from the color filter layer, comprising: S311: when the light intensity is lower than the preset intensity range, outputting a third preset voltage to the common electrode layer to drive the white electrophoretic particles to move downward, so as to control the light irradiated to the controllable light reflection layer to be reflected toward the side of the filter substrate away from the color filter layer; S312: Inputting an original working voltage to the common electrode layer.

[0067] When the light intensity is lower than the preset intensity range, since the white electrophoretic particles 560 originally in the particle channel 510 and the hemispherical groove 540 need to be pulled 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.

[0068] When the third preset voltage is output to the common electrode 710, only the voltage of the common electrode layer 700 may be changed. After the white electrophoretic particles 560 are controlled to move downward, the original working voltage is input to the common electrode layer 700. This does not require changing the voltage of the pixel electrode 231, and is easier to control.

[0069] Of course, it is also possible that, while the third preset voltage is output to the common electrode layer 700, the fourth preset voltage is also output to the pixel electrode 231. Specifically: S321: when the light intensity is lower than a preset intensity range, obtaining a display voltage of the pixel electrode; S322: Input a third preset voltage to the common electrode layer, and input a fourth preset voltage to the pixel electrode, the voltage difference between the pixel electrode and the common electrode layer in each pixel unit area being a preset difference, and drive the white electrophoretic particles to move downward, wherein the preset difference is a positive number.

[0070] 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 .

[0071] 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 fourth preset voltage of +20V is re-charged into the pixel electrode 231 through the voltage control module 30; when the display voltage of the pixel electrode 231 is -15V, the second preset voltage is -10V, thereby keeping the voltage difference between the pixel electrode 231 and the common electrode layer 700 unchanged, and also achieving the controllable downward movement of the white electrophoretic particles 560.

[0072] Embodiment 2: Fig. 9 is a schematic diagram of an electronic paper display panel according to the second embodiment of the present application. Fig. 9 As shown in the figure, different from the first embodiment, the controllable light reflection layer 500 in this embodiment is arranged 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 arranged between the filter substrate 400 and the color filter layer 600. A particle channel 510 is arranged on the base layer 530. The white electrophoretic particles 560 are located in the particle channel 510. The common electrode layer 700 is used to control the white electrophoretic particles. The electrophoretic particles 560 move up and down, and a hemispherical groove 540 and a barrier wall 550 are also provided on the base layer 530. The barrier wall 550 separates the particle channel 510 from 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 field shape. The hemispherical groove 540 is hemispherical in shape, and the hemispherical groove 540 is also filled with white electrophoretic particles 560.

[0073] 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, the process of setting the particle channel 510 and the hemispherical groove 540 on the base layer 530 of this embodiment is simpler, and there is no need to thicken the array substrate 210, and it will not damage the protective effect of the array substrate 210 on the electronic paper display panel 100.

[0074] Embodiment 3: Fig.10 is a schematic diagram of an electronic paper display panel according to the third embodiment of the present application, such as Fig.10 As shown, different from the first embodiment, the controllable light reflection layer 500 of this embodiment is arranged between the sub-color resists 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 arranged between the sub-color resists 610. A particle channel 510 is arranged on the base layer 530. The white electrophoretic particles 560 are located in the particle channel 510. The common electrode layer 700 is used to control the white electrophoretic particles 560 to move up and down. A hemispherical groove 540 and a barrier wall 550 are also provided on the base layer 530. The barrier wall 550 separates the particle channel 510 from the hemispherical groove 540. The particle channel 510 is located between two adjacent sub-color resists 610, that is, at the color resist gap 620. The hemispherical groove 540 is located between four adjacent sub-color resists 610 arranged in a field shape. The hemispherical groove 540 is hemispherical in shape, and is also filled with white electrophoretic particles 560.

[0075] 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, this embodiment reduces the thickness of the electronic paper display panel 100 by setting the controllable light reflection layer 500 between the sub-color resists 610, and the light does not need to pass through a thick color resist to be reflected to the sub-color resist 610 after irradiating the controllable light reflection layer 500, which can reduce the loss of light and improve the brightness of the electronic paper display panel 100.

[0076] More importantly, there is no need to reduce the number of white electrophoretic particles to avoid the bright line problem that occurs when viewing at a wide viewing angle.

[0077] It should be noted that the limitations on the various steps involved in this solution, without affecting the implementation of the specific solution, are not deemed to limit the order of the steps. The steps written in front can be executed first, or later, or even simultaneously. As long as this solution can be implemented, it should be deemed to fall within the scope of protection of this application.

[0078] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0079] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. An electronic paper display panel, characterized in that: The electronic paper display panel comprises an array substrate, an electrophoretic reflective layer, a filter substrate, a controllable light reflective layer, a color filter layer and a common electrode layer; The array substrate and the filter substrate are arranged opposite to each other, the electrophoretic reflective layer is arranged on the array substrate and is located on a side of the array substrate facing the filter substrate, and the controllable light reflective layer, the color filter layer and the common electrode layer are arranged in sequence on a side of the filter substrate facing the array substrate; The color filter layer includes a plurality of sub-color blocks, each of which is arranged at intervals, and a color block gap is defined between two adjacent sub-color blocks, and the projection of the controllable light reflecting layer is located on the color block gap; the common electrode layer can control the light irradiated to the controllable light reflecting layer to be reflected toward the side of the color filter layer away from the filter substrate, or to be reflected toward the side of the filter substrate away from the color filter layer.

2. The electronic paper display panel according to claim 1, characterized in that: A particle channel is arranged on the filter substrate, the controllable light reflection layer comprises a plurality of white electrophoretic particles, the white electrophoretic particles are located in the particle channel, and the common electrode layer is used to control the white electrophoretic particles to move up and down.

3. The electronic paper display panel according to claim 2, characterized in that: The particle channel includes a first inclined surface and a second inclined surface relative to each other, wherein 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, characterized in that: The multiple sub-color resists include green color resist, red color resist and blue color resist, and the particle channel between the red color resist and the green color resist is defined as a first particle channel, the particle channel between the red color resist and the blue color resist is defined as a second particle channel, and the particle channel between the green color resist and the blue color resist is also defined as a second particle channel, and the depth of the second particle channel is greater than the depth of the first particle channel.

5. A method for controlling 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 to 4, and the steps of the control method of the electronic paper display panel include: Detecting the intensity of light irradiated onto the electronic paper display panel; When the light intensity is higher than a preset intensity range, the common electrode layer controls the light irradiated to the controllable light reflection layer to be reflected toward the 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 onto the controllable light reflection layer to be reflected toward the 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, characterized in that: The controllable light reflecting layer comprises a plurality of white electrophoretic particles, and when the light intensity is higher than a preset intensity range, the common electrode layer controls the light irradiated to the controllable light reflecting layer to be reflected toward the side of the color filter layer away from the filter substrate, comprising: When the light intensity is higher than a preset intensity range, the common electrode layer drives the white electrophoretic particles to move upward, so as to control the light irradiated to the controllable light reflection layer to be reflected toward the 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 when the light intensity is higher than a preset intensity range so as to control the light irradiated to the controllable light reflection layer to be reflected toward the side of the color filter layer away from the filter substrate comprises: When the light intensity is higher than a preset intensity range, obtaining a display voltage of the pixel electrode; A first preset voltage is input to the common electrode layer, and a second preset voltage having a preset difference with the display voltage is input to the pixel electrode, so as to keep the voltage difference between the pixel electrode and the common electrode layer in each pixel unit area unchanged, and drive the white electrophoretic particles to move upward, wherein the preset difference is a negative number.

8. The control method of the electronic paper display panel according to claim 6, characterized in that: The step of controlling the common electrode layer to reflect the light irradiated onto the controllable light reflection layer toward the side of the filter substrate away from the color filter layer when the light intensity is lower than the preset intensity range comprises: When the light intensity is lower than the preset intensity range, a third preset voltage is output to the common electrode layer to drive the white electrophoretic particles to move downward, so as to control the light irradiated to the controllable light reflection layer to be reflected toward the side of the filter substrate away from the color filter layer; An original working voltage is input to the common electrode layer.

9. The control method of the electronic paper display panel according to claim 5, characterized in that: The steps of the electronic paper display panel control method further include: Get the information of the displayed image and get the average grayscale of the displayed image. When the average grayscale of the displayed image is higher than a preset brightness range, the common electrode layer controls the light irradiated onto the controllable light reflection layer to be reflected toward a side of the filter substrate away from the color filter layer; When the average grayscale of the displayed image is lower than a preset brightness range, the common electrode layer controls 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.

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 to 4, wherein the detection module is used to detect the intensity of light irradiated onto the electronic paper display panel, and the voltage control module is used to obtain the light intensity detected by the detection module and determine whether it exceeds a 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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