Electronic paper display device and display equipment

Abstract

The invention relates to the technical field of optical display, in particular to an electronic paper display device and display equipment. The first substrate and the second substrate are oppositely arranged, the driving layer is arranged on the first substrate, the electrophoresis layer is located between the driving layer and the second substrate, the electrophoresis layer is isolated by the pixel wall to form a plurality of sub-pixels, each sub-pixel comprises ink particles and electrified transparent liquid, and the driving layer is used for driving the electrified transparent liquid to extrude the ink particles to gather towards the pixel wall. The detection module is used for acquiring real-time light intensity values of the sub-pixels; the processing module is used for obtaining a light intensity difference value according to the real-time light intensity value and a light intensity preset value, and adjusting the electric field intensity of the driving layer according to the light intensity difference value. When the ink of the electronic paper flows back, the light intensity difference value is increased, and the processing module enhances the electric field intensity of the driving layer according to the light intensity difference value to maintain the shrinkage state of the ink, so that the contrast ratio of the electronic paper is increased, and the display effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of optical display, and in particular to an electronic paper display device and a display apparatus. Background Art

[0002] Electronic paper displays utilize external light sources to display images. Compared to liquid crystal displays (LCDs), electronic paper displays do not require a backlight, allowing for clear viewing even in strong sunlight. Due to their power savings, high reflectivity, and high contrast ratio, electronic paper displays are now widely used in e-readers and other electronic devices. However, existing electronic paper displays struggle to maintain the ink's contraction, leading to ink backflow and poor display quality. Summary of the Invention

[0003] The purpose of this application is to provide an electronic paper display device and a display equipment.

[0004] The present application provides an electronic paper display device, comprising: a display screen, comprising a first substrate, a second substrate, an electrophoretic layer, a drive layer and a pixel wall, wherein the first substrate and the second substrate are arranged opposite to each other, the drive layer is arranged on the first substrate, the electrophoretic layer is located between the drive layer and the second substrate, the electrophoretic layer is isolated by the pixel wall to form a plurality of sub-pixels, each of the sub-pixels comprises ink particles and a charged transparent liquid, the drive layer is used to drive the charged transparent liquid to squeeze the ink particles to gather toward the pixel wall; a detection module, arranged between the first substrate and the second substrate, the detection module is used to obtain real-time light intensity values ​​of the sub-pixels; a processing module, electrically connected to the detection module and the drive layer, respectively, the processing module is used to obtain a light intensity difference based on the real-time light intensity value and a preset light intensity value, and adjust the electric field strength of the drive layer according to the light intensity difference.

[0005] In an exemplary embodiment of the present application, the processing module is used to obtain a light intensity difference based on the real-time light intensity value and the preset light intensity value, and the step of adjusting the electric field strength of the driving layer according to the light intensity difference includes: if the ambient light intensity remains unchanged and the ink particles flow back, the light intensity difference increases, and the processing module is used to increase the electric field strength of the driving layer according to the light intensity difference to prevent the ink particles from flowing back.

[0006] In an exemplary embodiment of the present application, the processing module is used to obtain a light intensity difference based on the real-time light intensity value and the preset light intensity value, and the step of adjusting the electric field strength of the driving layer according to the light intensity difference includes: if the ambient light intensity increases and the ink particles flow back, the light intensity difference increases, and the processing module is used to enhance the electric field strength of the driving layer according to the light intensity difference to prevent the ink particles from flowing back.

[0007] In an exemplary embodiment of the present application, when no voltage is applied to the driving layer, the ink particles are spread flat on a side close to the driving layer; when a voltage is applied to the driving layer, the driving layer drives the charged transparent liquid to move toward a side close to the driving layer, and the charged transparent liquid squeezes the ink particles to move toward the pixel wall.

[0008] In an exemplary embodiment of the present application, the processing module includes a calculation module and an adjustment module, the calculation module is used to obtain a waveform compensation value according to the light intensity difference between the real-time light intensity value and the light intensity preset value; the adjustment module increases the electric field strength of the driving layer according to the waveform compensation value.

[0009] In an exemplary embodiment of the present application, the electronic paper display device further includes a reflective base plate and a filter film layer, the reflective base plate is arranged between the driving layer and the electrophoretic layer, the filter film layer is arranged between the second substrate and the electrophoretic layer, and the detection module is arranged on the reflective base plate and / or the detection module is arranged on the filter film layer.

[0010] In an exemplary embodiment of the present application, when the detection module is arranged on the reflective base plate, the detection module is used to detect the transmitted light of the sub-pixel to obtain the real-time transmitted light intensity value of the sub-pixel; when the detection module is arranged on the filter film layer, the detection module is used to detect the reflected light of the sub-pixel to obtain the real-time reflected light intensity value of the sub-pixel.

[0011] In an exemplary embodiment of the present application, the driving layer includes a first electrode and a second electrode that are correspondingly arranged, and the detection module is arranged between the first electrode and the sub-pixel, or the detection module is arranged between the second electrode and the sub-pixel.

[0012] In an exemplary embodiment of the present application, the electronic paper display device further includes a first hydrophobic insulating layer and a second hydrophobic insulating layer, wherein the first hydrophobic insulating layer is arranged between the reflective base plate and the electrophoretic layer; and the second hydrophobic insulating layer is arranged between the filter film layer and the electrophoretic layer.

[0013] The present application also provides a display device, comprising the electronic paper display apparatus.

[0014] An electronic paper display device and display apparatus according to the present invention has the following advantageous effects: a first substrate and a second substrate are disposed opposite each other, a drive layer is disposed on the first substrate, and an electrophoretic layer is disposed between the drive layer and the second substrate. The electrophoretic layer is separated by pixel walls to form a plurality of sub-pixels, each of which comprises ink particles and a charged transparent liquid. The drive layer is configured to drive the charged transparent liquid to squeeze the ink particles toward the pixel walls, causing the ink to contract. Ambient light is transmitted and reflected through the charged transparent liquid, thereby realizing an electronic paper display image. A detection module is disposed between the first and second substrates and is configured to obtain real-time light intensity values ​​of the sub-pixels. A processing module is electrically connected to the detection module and the drive layer, respectively, and is configured to determine a light intensity difference between the real-time light intensity value and a preset light intensity value, and to adjust the electric field strength of the drive layer based on the light intensity difference. When ink in the electronic paper flows back, the light intensity difference increases. The processing module increases the electric field strength of the drive layer based on the light intensity difference to maintain the contracted state of the ink, thereby increasing the contrast of the electronic paper and improving the display effect.

[0015] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0018] Figure 1 is a planar schematic diagram of an electronic paper display device according to an embodiment of the present invention;

[0019] Figure 2 is a control schematic diagram of an electronic paper display device according to an embodiment of the present invention;

[0020] Figure 3 1 is a schematic cross-sectional view taken along line AA of a first embodiment of an electronic paper display device according to an embodiment of the present invention, wherein ink particles are spread on a side close to the driving layer;

[0021] Figure 4 yes Figure 3 Schematic cross-sectional view of ink particles in a contracted state;

[0022] Figure 5 is a schematic cross-sectional view of ink particles at different shrinkage thicknesses in an electronic paper display device according to an embodiment of the present invention;

[0023] Figure 6 FIG. 1 is a cross-sectional schematic diagram of a second embodiment of an electronic paper display device along AA in an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 10. Display screen; 11. First substrate; 12. Second substrate; 13. Electrophoretic layer; 131. Sub-pixels; 132. Ink particles; 133. Charged transparent liquid; 14. Drive layer; 15. Pixel wall; 20. Detection module; 30. Processing module; 31. Calculation module; 32. Adjustment module; 40. Reflective base plate; 50. Filter film layer; 61. First electrode; 62. Second electrode; 63. Control circuit; 71. First hydrophobic insulating layer; 72. Second hydrophobic insulating layer. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] The terms "first", "second" and "third" in the embodiments of the present application are only used for descriptive purposes and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second" and "third" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally also include steps or units that are not listed, or may optionally also include other steps or units inherent to these processes, methods, products or devices.

[0028] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] Electronic paper displays utilize external light sources to display images. Compared to liquid crystal displays (LCDs), electronic paper displays do not require a backlight, allowing for clear viewing even in strong sunlight. Due to their power savings, high reflectivity, and high contrast ratio, electronic paper displays are now widely used in e-readers and other electronic devices. However, existing electronic paper displays struggle to maintain the contraction of the ink, resulting in ink backflow and reduced contrast, thus affecting the display quality.

[0030] In order to solve the above technical problems, refer to Figures 1 to 3 As shown, the present application provides an electronic paper display device, including a display screen 10, a detection module 20, and a processing module 30; the display screen 10 includes a first substrate 11, a second substrate 12, an electrophoretic layer 13, a driving layer 14, and a pixel wall 15. The first substrate 11 and the second substrate 12 are arranged opposite each other, the driving layer 14 is arranged on the first substrate 11, and the electrophoretic layer 13 is located between the driving layer 14 and the second substrate 12. The electrophoretic layer 13 is isolated by the pixel wall 15 to form a plurality of sub-pixels 131. The sub-pixels 131 each include ink particles 132 and a charged transparent liquid 133. The driving layer 14 is used to drive the charged transparent liquid 133 to squeeze the ink particles 132 to gather toward the pixel wall 15. Thus, the driving layer 14 is used to drive the charged transparent liquid 133 to squeeze the ink particles 132 to gather toward the pixel wall 15, so that the ink is in a contracted state, and ambient light is transmitted and reflected in the charged transparent liquid 133, thereby realizing the electronic paper display image. The detection module 20 is disposed between the first substrate 11 and the second substrate 12. It is used to obtain the real-time light intensity value of the sub-pixel 131. The processing module 30 is electrically connected to the detection module 20 and the driver layer 14, respectively. The processing module 30 is used to determine the light intensity difference between the real-time light intensity value and the preset light intensity value, and to adjust the electric field strength of the driver layer 14 based on the light intensity difference. Therefore, when the ink in the electronic paper flows back, the light intensity difference increases. The processing module 30 increases the electric field strength of the driver layer 14 based on the light intensity difference to maintain the ink's contraction state, thereby enhancing the contrast of the electronic paper and improving the display effect.

[0031] In some embodiments, the electronic paper is an electrowetting electronic paper (EWD). Ink reflow is a key phenomenon in EWD. This refers to the phenomenon in which ink that has contracted or spread due to the electrowetting effect partially or completely returns to its original state due to changes in interfacial tension when the electric field is turned off or the voltage changes. This application primarily addresses the issue of ink reflow in a contracted state.

[0032] In some embodiments, reference Figure 3As shown, when the electronic paper display device is turned off, the applied voltage of the driving layer 14 disappears, the charged transparent liquid 133 moves away from the driving layer 14, and the shrunk ink particles 132 spread on the side close to the driving layer 14. Since the ink particles 132 absorb and block the ambient light, the display disappears. Figure 4 As shown, when the electronic paper display device is turned on, a voltage is applied to the driving layer 14 to drive the charged transparent liquid 133 to move toward the driving layer 14, thereby squeezing the ink particles 132 to gather toward the pixel wall 15 to form a contracted state. Since the ink particles 132 are in a contracted state on the side of the pixel wall 15, the charged transparent liquid 133 is located between the ink particles 132 on both sides, and the ambient light can pass through the charged transparent liquid 133 to form a display image.

[0033] In some embodiments, electronic paper can be divided into monochrome electronic paper and color electronic paper according to the display color. Monochrome electronic paper realizes grayscale display through the movement of black and white charged particles and only supports black and white or single tones (such as red, yellow, etc.); color electronic paper sets a filter film layer 50 on the black and white ink layer, but the color saturation is low, presenting a "light color" effect.

[0034] In some embodiments, the detection module 20 is a photoelectric sensor. A photoelectric sensor is a device that converts light signals into electrical signals using the photoelectric effect. It can detect parameters such as the presence, distance, color, and brightness of an object. Its core principle is to sense changes in light through a photosensitive element, thereby triggering or adjusting the circuit output signal. It is widely used in industrial automation, consumer electronics, medical equipment and other fields.

[0035] In some embodiments, reference Figure 2 and Figure 3As shown, the processing module 30 is configured to obtain a light intensity difference based on the real-time light intensity value and the preset light intensity value. The step of adjusting the electric field strength of the driving layer 14 based on the light intensity difference includes: if the ambient light intensity remains unchanged and the ink particles 132 are backflowing, the light intensity difference increases, and the processing module 30 is configured to increase the electric field strength of the driving layer 14 based on the light intensity difference to prevent the ink particles 132 from backflowing. When the electronic paper display device is turned on, after one or more frames of image signals are input, the driving layer 14 applies a continuous voltage to cause the charged transparent liquid 133 to move toward the driving layer 14. The charged transparent liquid 133 squeezes the ink particles 132 to the side near the pixel wall 15, squeezing the ink particles 132 into a contracted state. Once the contracted state of the ink particles 132 stabilizes, the image signal of the current frame can be maintained. If the ambient light intensity remains unchanged and the ink particles 132 are backflowing, the real-time light intensity value of the sub-pixel 131 obtained by the detection module 20 decreases, and the light intensity difference increases. If the ambient light intensity increases and the ink particles 132 flow back, the light intensity difference increases. The processing module 30 is configured to increase the electric field strength of the drive layer 14 based on the light intensity difference to prevent the ink particles 132 from flowing back. When the electronic paper display device is turned on, during one or more frames of image signals, the drive layer 14 applies a continuous voltage, causing the charged transparent liquid 133 to move toward the drive layer 14. The charged transparent liquid 133 squeezes the ink particles 132 to the side close to the pixel wall 15, squeezing the ink particles 132 into a contracted state. Once the contracted state of the ink particles 132 stabilizes, the image signal of the current frame can be maintained. If the ambient light intensity increases and the ink particles 132 flow back, the real-time light intensity value of the sub-pixel 131 obtained by the detection module 20 decreases, and the light intensity difference also increases. The processing module 30 increases the electric field strength of the driving layer 14 according to the light intensity difference when the ambient light intensity remains unchanged or increases, thereby increasing the attraction of the electric field on the charged transparent liquid 133, thereby keeping the reflowing ink particles 132 in the initial contracted state to prevent the ink particles 132 from flowing back and improving the display effect of the electronic paper.

[0036] In some embodiments, reference Figure 2 and Figure 3 As shown, if the ambient light intensity remains unchanged and the ink particles 132 reflow, the light intensity difference is a first difference. If the ambient light intensity increases and the ink particles 132 reflow, the light intensity difference is a second difference, and the second difference is greater than the first difference. That is, the light intensity difference is greater when the ambient light intensity increases compared to when the ambient light intensity remains unchanged. If the ambient light intensity remains unchanged and the ink particles 132 reflow, the electric field strength is a first electric field. If the ambient light intensity increases and the ink particles 132 reflow, the electric field strength is a second electric field. The second electric field is greater than the first electric field, thereby increasing the contrast of the display screen 10.

[0037] In some embodiments, to enhance display quality, it is necessary to prevent the ink particles 132 from flowing back when each frame of image signal is input. Furthermore, during the transition between multiple frames of image, the contraction state of the ink particles 132 needs to be changed to increase the contrast of the display screen 10. When the display screen 10 is in the off state and the external light is extremely dim, the processing module 30 does not process the light intensity value to prevent accidental touches.

[0038] In some embodiments, reference Figure 5 As shown, the contraction state of the ink particles 132 can be divided into multiple contraction states according to the contraction thickness. When image signals of different frames are input, the driving voltage applied by the driving layer 14 is different, and the attraction to the charged transparent liquid 133 is different. Therefore, the squeezing force of the charged transparent liquid 133 on the ink particles 132 is different, resulting in different contraction thicknesses of the ink particles 132. Figure 5 (a) The applied voltage V is 0, and the ink particles 132 are spread flat in the pixel area; Figure 5 (b) The applied voltage V is a first voltage V1, and the shrinkage thickness of the ink particles 132 is a first thickness D1; Figure 5 (c) The applied voltage V is a second voltage V2, at which point the shrinkage thickness of the ink particles 132 is a second thickness D2; Figure 5 (d) The applied voltage V is a third voltage V3, and the contracted thickness of the ink particles 132 is a third thickness D3; wherein the contracted thickness is inversely proportional to the voltage intensity, that is, the first voltage is less than the second voltage, and the second voltage is less than the third voltage; the first thickness is greater than the second thickness, and the second thickness is greater than the third thickness.

[0039] In some embodiments, reference Figure 2 and Figure 6 As shown, the concentration of the ink particles 132 is greater than the concentration of the charged transparent liquid 133; when the driving layer 14 is not applied with a voltage, the ink particles 132 are spread on the side close to the driving layer 14; Figure 3As shown, when a voltage is applied to the drive layer 14, the drive layer 14 drives the charged transparent liquid 133 to move toward the side closest to the drive layer 14. The charged transparent liquid 133 squeezes the ink particles 132 toward the pixel wall 15. As a result, the concentration of ink particles 132 is greater than that of the charged transparent liquid 133. The charged transparent liquid 133 is not charged water. Due to the incompatibility between ink particles 132 and water, when no voltage is applied to the drive layer 14, the ink particles 132 are spread flat under the charged transparent liquid 133 under the action of gravity. At this time, the display screen 10 presents a black screen and is in the off or off state. When a voltage is applied to the drive layer 14, the drive layer 14 drives the charged transparent liquid 133 to move toward the side closest to the drive layer 14. The charged transparent liquid 133 squeezes the ink particles 132 toward the pixel wall 15, causing the ink to be in a contracted state. At this time, the display screen 10 presents an image and is in the on state.

[0040] In some embodiments, reference Figure 2 As shown, the processing module 30 includes a calculation module 31 and an adjustment module 32. The calculation module 31 is used to determine a waveform compensation value based on the difference between the real-time light intensity value and the preset light intensity value. The adjustment module 32 increases the electric field strength of the driver layer 14 based on the waveform compensation value. The calculation module 31 and the adjustment module 32 work together to optimize the design of electronic paper displays in dynamic environments. By real-time monitoring of ambient light intensity, the electric field strength of the driver layer 14 is intelligently adjusted to compensate for issues such as decreased display contrast and ink backflow caused by varying illumination, ensuring that the screen maintains optimal display quality in complex scenes such as strong outdoor light and low indoor light. The detection module 20 integrated into the reflective base plate 40 and / or the filter layer 50 collects ambient light data in real time, ensuring rapid response to changes in illumination. The preset value is determined by the display mode (e.g., "Reading Mode" is preset to between 200 lux and 500 lux, and "Outdoor Mode" is preset to between 1000 lux and 2000 lux), supporting user customization or system adaptive adjustment. After the calculation module 31 receives the sensor data, it adopts an incremental PID control algorithm to generate a waveform compensation value based on the light intensity difference through a nonlinear mapping function. It is also possible to build a self-learning database in the real device to record historical illumination data, combine time and geographical location (through the GPS module) to predict illumination trends, and pre-compensate in advance to reduce response delays. And by automatically performing zero-point calibration at regular intervals, the sensor drift error is eliminated and the compensation accuracy is improved. After receiving the waveform compensation value output by the calculation module 31, the adjustment module 32 converts the compensation value into a voltage increment of the electric field of the drive layer 14 through a high-voltage drive circuit. The real-time drive voltage is the sum of the basic drive voltage of the current display content and the voltage increment. During waveform compensation, the compensation voltage is loaded in a ramp form to avoid sudden voltage causing particle oscillation. The pulse frequency is increased under strong light to accelerate particle response, and the pulse frequency is reduced under weak light to save power consumption.

[0041] In some embodiments, reference Figure 3 and Figure 6 As shown, the electronic paper display device also includes a reflective base plate 40 and a filter film layer 50. The reflective base plate 40 is arranged between the driving layer 14 and the electrophoretic layer 13, the filter film layer 50 is arranged between the second substrate 12 and the electrophoretic layer 13, and the detection module 20 is arranged on the reflective base plate 40 and / or the detection module 20 is arranged on the filter film layer 50. The reflective base plate 40 is located between the driving layer 14 and the electrophoretic layer 13, and adopts a high-reflectivity nano-coating material (such as a vacuum-evaporated aluminum layer, etc.). It can also be anodized on the surface to form a honeycomb microstructure, which effectively reduces the loss of diffuse reflected light. The surface of the reflective base plate 40 can be coated with a light-absorbing black matrix to avoid reflective interference from the driving layer 14 circuit, making the black display purer. The reflective base plate 40 is embedded with a copper mesh layer to evenly conduct heat from the driving chip to ensure display stability in a high-temperature environment. The filter layer 50 comprises RGB quantum dot filters, an anti-reflective coating, and a flexible barrier layer. The RGB quantum dot filters utilize a pixel-level spray coating process to achieve high color gamut coverage, while the anti-reflective coating utilizes a multi-layer structure formed by alternating coatings to reduce surface reflectivity. The flexible barrier layer is based on polyimide, extending the life of the electrophoretic fluid. This design compensates for color deviations in the electrophoretic particles through the RGB quantum dot filters, dynamically adjusting their transmittance to enhance brightness in strong light and contrast in low light.

[0042] In some embodiments, reference Figure 3 As shown, when the detection module 20 is disposed on the reflective base plate 40, the detection module 20 is used to detect the transmitted light of the sub-pixel 131 to obtain the real-time transmitted light intensity value of the sub-pixel 131; Figure 6 As shown, when the detection module 20 is positioned within the filter layer 50, it detects the reflected light from the sub-pixel 131 to obtain the real-time reflected light intensity value of the sub-pixel 131. The detection module 20 is embedded within the reflective backplane 40 and utilizes a miniaturized array of photosensitive elements, with each sub-pixel 131 corresponding to an independent sensor. After ambient light passes through the electrophoretic layer 13, some of the light is absorbed or scattered by particles. The remaining transmitted light is captured by the detection module 20 before being reflected by the reflective backplane 40. The detection module 20, integrated into the edge of the filter layer 50 in thin film form, utilizes a non-invasive optical fiber grid to collect the intensity of light reflected from the sub-pixel 131 surface through the principle of total internal reflection. After being modulated by the filter layer 50, the ambient light is reflected back toward the viewer by the electrophoretic layer 13. Part of the reflected light is captured by the optical fiber to avoid obstructing the active display area.

[0043] In some embodiments, reference Figure 3 and Figure 6As shown, the drive layer 14 includes corresponding first and second electrodes 61, 62. The detection module 20 is located between the first electrode 61 and the sub-pixel 131, or between the second electrode 62 and the sub-pixel 131. The drive layer 14 adopts a dual-electrode architecture, and the detection module 20 can achieve precise monitoring and dynamic compensation of the driving electric field and particle motion. Depending on the installation position of the detection module 20, the system can adapt to different display scenarios and optimize control accuracy and response speed. The first and second electrodes 61, 62 are transparent conductive layers.

[0044] In some embodiments, reference Figure 3 and Figure 6 As shown, the drive layer 14 also includes a control circuit 63, which is responsible for converting the image signal into a precise electric field drive signal and coordinating the movement of the electrophoretic particles to achieve the target display effect. The control circuit 63 uses low-temperature polysilicon or oxide semiconductor technology. Each sub-pixel 131 corresponds to a thin-film transistor to ensure high-speed signal transmission. It includes a gate driver, a source driver, a timing controller and a power management module. The gate driver is integrated at the edge of the glass substrate and activates the target row pixels by row-by-row scanning. The source driver outputs the grayscale voltage to the data line. The timing controller outputs the grayscale voltage to the data line, and the power management module provides multiple voltages.

[0045] In some embodiments, reference Figure 3 and Figure 6 As shown, the electronic paper display device further includes a first hydrophobic insulating layer 71 and a second hydrophobic insulating layer 72. The first hydrophobic insulating layer 71 is disposed between the reflective substrate 40 and the electrophoretic layer 13; the second hydrophobic insulating layer 72 is disposed between the filter layer 50 and the electrophoretic layer 13. The first hydrophobic insulating layer 71 and the second hydrophobic insulating layer 72 are prepared using a spin coating process or an inkjet printing process, and their materials may include at least one of polyimide, a fluorinated polymer, and silicon dioxide. The first hydrophobic insulating layer 71 and the second hydrophobic insulating layer 72 are used to isolate the charged transparent liquid 133 and ink particles 132 of the sub-pixel 131, ensuring the sealing performance of the sub-pixel 131.

[0046] In the present application, when the electronic paper display device is turned on, after a frame of image signal is input, the driving layer 14 applies a continuous voltage to make the charged transparent liquid 133 move toward the driving layer 14. The charged transparent liquid 133 squeezes the ink particles 132 to the side close to the pixel wall 15, squeezing the ink particles 132 to form a contracted state. When the contracted state of the ink particles 132 is stable, the image signal of the current frame can be maintained. If the ambient light intensity remains unchanged and the ink particles 132 flow back, the real-time light intensity value of the sub-pixel 131 obtained by the detection module 20 is weakened, and the light intensity difference increases. The processing module 30 increases the electric field strength of the driving layer 14 according to the light intensity difference to enhance the attraction of the electric field on the charged transparent liquid 133, thereby keeping the returning ink particles 132 in the initial contracted state to prevent the ink particles 132 from flowing back and enhance the display effect of the electronic paper. When the electronic paper display device is turned on, during the transition between multiple image frames, the driver layer 14 changes the voltage of each image signal, causing the contraction state of the ink particles 132 to change. If the ambient light intensity increases and the contrast of the display screen 10 decreases, the real-time light intensity value of the sub-pixel 131 obtained by the detection module 20 decreases, and the light intensity difference increases. The processing module 30 increases the electric field strength of the driver layer 14 based on the light intensity difference, thereby strengthening the electric field's attraction to the charged transparent liquid 133. This reduces the contracted thickness of the ink particles 132, increases the transmittance or reflectivity of the electronic paper, and improves the contrast of the display screen 10. When the display screen 10 is off and the external light is extremely dim, the processing module 30 does not process the light intensity value to prevent accidental touches.

[0047] The present application also provides a display device, comprising the above-mentioned electronic paper display apparatus.

[0048] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electronic paper display device, characterized in that: include: A display screen includes a first substrate, a second substrate, an electrophoretic layer, a drive layer, and a pixel wall. The first and second substrates are arranged opposite each other, the drive layer is provided on the first substrate, the electrophoretic layer is located between the drive layer and the second substrate, the electrophoretic layer is isolated by the pixel wall to form a plurality of sub-pixels, each of the sub-pixels includes ink particles and a charged transparent liquid, and the drive layer is used to drive the charged transparent liquid to squeeze the ink particles toward the pixel wall. a detection module, disposed between the first substrate and the second substrate, the detection module being configured to obtain a real-time light intensity value of the sub-pixel; A processing module is electrically connected to the detection module and the driving layer respectively, and is used to obtain a light intensity difference according to the real-time light intensity value and a preset light intensity value, and adjust the electric field intensity of the driving layer according to the light intensity difference.

2. The electronic paper display device according to claim 1, wherein: The processing module is configured to obtain a light intensity difference value according to the real-time light intensity value and a preset light intensity value, and the step of adjusting the electric field intensity of the driving layer according to the light intensity difference includes: If the ambient light intensity remains unchanged and the ink particles flow back, the light intensity difference increases, and the processing module is used to increase the electric field intensity of the driving layer according to the light intensity difference to prevent the ink particles from flowing back.

3. The electronic paper display device according to claim 1, wherein: The processing module is configured to obtain a light intensity difference value according to the real-time light intensity value and a preset light intensity value, and the step of adjusting the electric field intensity of the driving layer according to the light intensity difference includes: If the ambient light intensity increases and the ink particles flow back, the light intensity difference increases, and the processing module is used to increase the electric field intensity of the driving layer according to the light intensity difference to prevent the ink particles from flowing back.

4. The electronic paper display device according to claim 1, wherein: When no voltage is applied to the driving layer, the ink particles are spread flat on a side close to the driving layer; When a voltage is applied to the driving layer, the driving layer drives the charged transparent liquid to move toward a side close to the driving layer, and the charged transparent liquid squeezes the ink particles to move toward the pixel wall.

5. The electronic paper display device according to claim 1, wherein: The processing module includes a calculation module and an adjustment module. The calculation module is used to obtain a waveform compensation value according to the light intensity difference between the real-time light intensity value and the light intensity preset value; the adjustment module increases the electric field intensity of the driving layer according to the waveform compensation value.

6. The electronic paper display device according to claim 1, wherein: The electronic paper display device also includes a reflective base plate and a filter film layer, the reflective base plate is arranged between the driving layer and the electrophoretic layer, the filter film layer is arranged between the second substrate and the electrophoretic layer, and the detection module is arranged on the reflective base plate and / or the detection module is arranged on the filter film layer.

7. The electronic paper display device according to claim 6, wherein: When the detection module is provided on the reflective base plate, the detection module is used to detect the transmitted light of the sub-pixel to obtain the real-time transmitted light intensity value of the sub-pixel; When the detection module is disposed on the filter layer, the detection module is used to detect the reflected light of the sub-pixel to obtain the real-time reflected light intensity value of the sub-pixel.

8. The electronic paper display device according to claim 6, wherein: The driving layer includes a first electrode and a second electrode that are correspondingly arranged. The detection module is arranged between the first electrode and the sub-pixel, or the detection module is arranged between the second electrode and the sub-pixel.

9. The electronic paper display device according to claim 6, wherein: The electronic paper display device further includes a first hydrophobic insulating layer and a second hydrophobic insulating layer. The first hydrophobic insulating layer is provided between the reflective base plate and the electrophoretic layer; the second hydrophobic insulating layer is provided between the filter film layer and the electrophoretic layer.

10. A display device, characterized in that: The electronic paper display device comprises the electronic paper display device according to any one of claims 1 to 9.

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