Electronic paper display device and its control and preparation methods

Abstract

This application discloses an electronic paper display device and its control and manufacturing methods, mainly relating to the field of display technology. The electronic paper display device includes an electronic paper display panel, a liquid sand cavity, liquid sand oil, electrically charged sand particles, and a liquid sand control electrode layer. The liquid sand cavity is disposed on the light-emitting surface of the electronic paper display panel. The liquid sand oil and the electrically charged sand particles are both disposed within the liquid sand cavity. The liquid sand control electrode layer is disposed on the side of the liquid sand cavity opposite to the electronic paper display panel, and is used to control the movement of the electrically charged sand particles. Through the above design, the display performance of the electronic paper display device can be enriched while reducing the impact of electrically charged sand particles on the display image.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to an electronic paper display device and its control and preparation methods. Background Technology

[0002] Electronic paper display devices are a special type of display screen that is ultra-thin, rewritable, low-power, portable, and can maintain display even when power is off. To improve the appearance of electronic paper display devices, static decorative films are usually applied to the outside.

[0003] However, this method of applying decorative film lacks dynamic and variable visual effects, and its direct application to the light-emitting surface has a significant impact on the displayed image. Summary of the Invention

[0004] The purpose of this application is to provide an electronic paper display device and its control and preparation methods, which enriches the display performance of the electronic paper display device while reducing the impact of charged sand particles on the display screen.

[0005] This application discloses an electronic paper display device, which includes an electronic paper display panel, a flowing sand cavity, flowing sand oil, electrically charged sand particles, and a flowing sand control electrode layer. The flowing sand cavity is disposed on the light-emitting surface of the electronic paper display panel. The flowing sand oil and the electrically charged sand particles are both disposed in the flowing sand cavity. The flowing sand control electrode layer is disposed on the side of the flowing sand cavity away from the electronic paper display panel, and the flowing sand control electrode layer is used to control the movement of the electrically charged sand particles.

[0006] Optionally, the electronic paper display panel includes an active switch layer, a pixel electrode layer, an electronic paper layer, and a common electrode layer, wherein the active switch layer, the pixel electrode layer, the electronic paper layer, and the common electrode layer are arranged sequentially, the active switch layer includes a plurality of pixel active switches, the pixel electrode layer includes a plurality of pixel electrodes, the plurality of pixel active switches are connected to the plurality of pixel electrodes one by one, and the quicksand cavity is disposed on the side of the active switch layer away from the electronic paper layer; The current-carrying sand particles are negatively polarized.

[0007] Optionally, the spacing between two adjacent pixel electrodes is defined as a pixel interval region; the quicksand control electrode layer includes a mesh-like quicksand control electrode, and the mesh-like quicksand control electrode corresponds to the pixel interval region.

[0008] Optionally, the electronic paper display panel includes an active switch layer, a pixel electrode layer, an electronic paper layer, and a common electrode layer, wherein the active switch layer, the pixel electrode layer, the electronic paper layer, and the common electrode layer are arranged sequentially, and the common electrode layer is located on the side of the pixel electrode layer close to the quicksand control electrode layer; The quicksand control electrode layer includes multiple quicksand control electrodes and multiple quicksand active switches. The multiple quicksand control electrodes are arranged in a matrix, and the quicksand active switches are connected to each of the quicksand control electrodes.

[0009] Optionally, the electronic paper display panel includes multiple pixel units, which are arranged in a matrix; the multiple sand control electrodes correspond one-to-one with the multiple pixel units.

[0010] Optionally, the quicksand control electrode layer includes an upper electrode and a lower electrode, which are respectively disposed on both sides of the quicksand cavity. The upper electrode and the lower electrode are used to control the falling speed of the current-carrying sand particles.

[0011] This application also discloses a control method for an electronic paper display device, the control method for controlling the electronic paper display device, the control method for the electronic paper display device including the following steps: Check if an enable command has been received; Upon receiving an activation command, a control voltage is input to the quicksand control electrode layer to control the movement of the current-carrying sand particles.

[0012] Optionally, the electronic paper display device includes a main area and a surrounding area, the main area being used to display the focus image and the surrounding area being used to display the background image; the quicksand control electrode layer includes multiple quicksand control electrodes and multiple quicksand active switches, the multiple quicksand control electrodes being arranged in a matrix, and the quicksand active switches being connected to the quicksand control electrodes one by one; The direction of the fall of the charged sand particles is defined as the first direction; The step of inputting a control voltage to the quicksand control electrode layer and controlling the movement of the current-carrying sand particles upon receiving an activation command includes: Upon receiving the activation command, a voltage of the same polarity as the charged sand particles is input to the quicksand control electrode in the main area row by row along the first direction; A voltage of opposite polarity to that of the current-carrying sand particles is input row by row along the first direction to the sand control electrode in the surrounding area to control the movement of the current-carrying sand particles.

[0013] Optionally, the electronic paper display device further includes a preparation area located above the main area, and a second direction is defined as the direction along the main area toward the preparation area, wherein the number of the sand control electrodes in each row in the preparation area gradually decreases along the second direction; The step of inputting a voltage of the same polarity as the charged sand particles to the quicksand control electrode in the main area row by row along the first direction upon receiving an activation command includes: Upon receiving an activation command, a voltage of the same polarity as the charged sand particles is input row by row to the sand control electrode in the preparation area along the first direction; A voltage of the same polarity as the current-carrying sand particles is input row by row to the quicksand control electrode in the main region.

[0014] This application also discloses a method for fabricating an electronic paper display device. The method for fabricating an electronic paper display device includes the following steps: A quicksand cavity is set on one side of the light-emitting surface of the electronic paper display panel; The quicksand cavity is filled with quicksand oil and electrically charged sand particles; A flow sand control electrode layer is formed on the side of the flow sand cavity opposite to the electronic paper display panel.

[0015] Compared to existing electronic paper display devices, this application provides a flowing sand cavity on the light-emitting surface of the electronic paper display panel. The flowing sand oil and the charged sand particles are filled in the flowing sand cavity. A flowing sand control electrode layer is provided outside the flowing sand cavity, which is equivalent to the charged sand particles serving as a foreground layer and the electronic paper display panel serving as a background layer. The flowing sand control electrode layer can control the movement of the charged sand particles, thereby affecting the falling path of the charged sand particles. This enriches the display performance of the electronic paper display device while reducing the impact of the charged sand particles on the display image. Attached Figure Description

[0016] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings: Figure 1 This is a schematic diagram of an electronic paper display device according to the first embodiment of this application; Figure 2This is a schematic diagram of an electrically charged sand particle according to the first embodiment of this application; Figure 3 This is a schematic diagram of an electronic paper display panel according to the first embodiment of this application; Figure 4 This is a planar schematic diagram of a mesh quicksand control electrode according to an embodiment of this application; Figure 5 This is a cross-sectional schematic diagram of a mesh quicksand control electrode according to an embodiment of this application; Figure 6 This is a schematic diagram of a quicksand cavity according to an embodiment of this application; Figure 7 This is a schematic diagram of an electronic paper display device according to a second embodiment of this application; Figure 8 This is a schematic diagram of a main area of ​​a second embodiment of this application; Figure 9 This is a schematic diagram showing a one-to-one correspondence between a pixel unit and a quicksand control electrode according to the second embodiment of this application; Figure 10 This is a schematic diagram of a control method for an electronic paper display device according to an embodiment of this application; Figure 11 This is a schematic diagram of a method for controlling the path of electrically charged sand particles according to an embodiment of this application; Figure 12 This is a schematic diagram of a preparation area according to an embodiment of this application; Figure 13 This is a schematic flowchart of a method for manufacturing an electronic paper display device according to an embodiment of this application; Figure 14 This is a schematic diagram of the manufacturing process of an electronic paper display device according to an embodiment of this application.

[0017] Among them, 10 is an electronic paper display device; 100 is an electronic paper display panel; 110 is a pixel unit; 120 is an active switch layer; 121 is a pixel active switch; 130 is a pixel electrode layer; 131 is a pixel electrode; 140 is an electronic paper layer; 141 is black electrophoretic particles; 142 is white electrophoretic particles; 150 is a common electrode layer; 160 is a pixel spacing area; 171 is a main area; 172 is a surrounding area; 173 is a preparation area; 200 is a quicksand cavity; 210 is quicksand oil; 220 is current-carrying quicksand particles; 221 is a core part; 222 is an intermediate layer; 223 is a shell part; 300 is a quicksand control electrode layer; 310 is a mesh quicksand control electrode; 321 is a quicksand control electrode; 322 is a quicksand active switch; 331 is an upper electrode; and 332 is a lower electrode. Detailed Implementation

[0018] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0020] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0023] Example 1: Figure 1 This is a schematic diagram of an electronic paper display device according to the first embodiment of this application. Figure 2 This is a schematic diagram of an electrically charged sand particle according to the first embodiment of this application, as shown below. Figures 1-2 As shown, this application discloses an electronic paper display device 10, which includes an electronic paper display panel 100, a sand cavity 200, sand oil 210, current-carrying sand particles 220, and a sand control electrode layer 300.

[0024] The quicksand cavity 200 is disposed on the light-emitting surface of the electronic paper display panel 100. The quicksand oil 210 and the current-carrying sand particles 220 are both disposed inside the quicksand cavity 200. The quicksand control electrode layer 300 is disposed on the side of the quicksand cavity 200 away from the electronic paper display panel 100. The quicksand control electrode layer 300 is used to control the movement of the current-carrying sand particles 220.

[0025] The electronic paper display panel 100 is used to display images. It can be an electrophoretic display panel, a cholesteric liquid crystal display panel, etc., which can achieve low power consumption and high contrast image display. This application uses the electrophoretic display panel 100 as an example for explanation.

[0026] The flowing sand oil 210 is an insulating liquid with viscosity and dielectric constant. Its function is to provide a medium for suspending and moving the current-carrying sand particles 220, while avoiding excessive adhesion or sedimentation between the current-carrying sand particles 220 and between them and the cavity wall.

[0027] The flowing sand control electrode layer 300 can generate a corresponding electric field distribution in the flowing sand cavity 200. The electric field force drives the current-carrying sand particles 220 to move back and forth or left and right during the falling of the flowing sand oil 210, thereby changing the spatial distribution of the current-carrying sand particles 220 in the flowing sand cavity 200.

[0028] Compared to existing electronic paper display devices, this application provides a sand cavity 200 on the light-emitting surface of the electronic paper display panel 100. The sand oil 210 and the current-charged sand particles 220 are filled in the sand cavity 200. A sand control electrode layer 300 is provided outside the sand cavity 200. This is equivalent to the current-charged sand particles 220 serving as a foreground layer and the electronic paper display panel 100 serving as a background layer. The sand control electrode layer 300 can control the movement of the current-charged sand particles 220, thereby affecting their falling path. This enriches the display performance of the electronic paper display device 10 while reducing the impact of the current-charged sand particles 220 on the display image.

[0029] Moreover, compared to existing quicksand products, this application can update the background of the quicksand layer in real time by changing the screen of the electronic paper display panel 100.

[0030] The charged sand particles 220 include a core portion 221, an intermediate layer 222, and an outer shell portion 223. The intermediate layer 222 encloses the core portion 221, and the outer shell portion 223 encloses the intermediate layer 222. The core portion 221 includes charged particles, the intermediate layer 222 includes an insulating viscous solvent, and the outer shell portion 223 includes a low surface energy polymer material.

[0031] The particle size of the current-charged sand particles 220 can be 10 nm to 5 μm. The core portion 221 can carry a positive or negative charge, and charged groups can be introduced through copolymerization. The intermediate layer 222 encapsulates the core portion 221 to prevent charge neutralization. The outer shell portion 223 is used to cover and prevent the current-charged sand particles 220 from agglomerating, so that the current-charged sand particles 220 have a low interfacial tension in the flowing sand oil 210, thereby reducing adsorption to the wall of the flowing sand cavity 200, ensuring the smooth movement of the current-charged sand particles 220, and further improving the controllability and stability of the flowing sand effect.

[0032] Figure 3 This is a schematic diagram of an electronic paper display panel according to the first embodiment of this application, as shown below. Figure 3 As shown, in this embodiment, the pixel electrode layer 130 of the electronic paper display panel 100 is located between the common electrode layer 150 and the flow control electrode layer 300 of the display panel. Specifically: The electronic paper display panel 100 includes an active switch layer 120, a pixel electrode layer 130, an electronic paper layer 140, and a common electrode layer 150. The active switch layer 120, the pixel electrode layer 130, the electronic paper layer 140, and the common electrode layer 150 are arranged sequentially. The active switch layer 120 includes a plurality of pixel active switches 121, and the pixel electrode layer 130 includes a plurality of pixel electrodes 131. The plurality of pixel active switches 121 are connected to the plurality of pixel electrodes 131 one by one. The quicksand cavity 200 is disposed on the side of the active switch layer 120 away from the electronic paper layer 140.

[0033] The current-carrying sand particles 220 are negatively polarized.

[0034] For example, the electronic paper layer 140 includes black electrophoretic particles 141 and white electrophoretic particles 142, wherein the black electrophoretic particles 141 are negatively charged and the white electrophoretic particles 142 are positively charged.

[0035] When the pixel unit 110 corresponding to the current pixel electrode 131 displays a black image, the pixel electrode 131 is at a positive voltage, the black electrophoretic particles 141 move upward toward the side of the pixel electrode 131, and the white electrophoretic particles 142 move downward toward the side of the common electrode layer 150.

[0036] When the pixel unit 110 corresponding to the current pixel electrode 131 displays a white image, the pixel electrode 131 is at a negative voltage, the black electrophoretic particles 141 move downward toward the side of the common electrode layer 150, and the white electrophoretic particles 142 move upward toward the side of the pixel electrode 131.

[0037] A voltage of +1 or -1 can be applied to the flowing sand control electrode layer 300. Since the current-carrying sand particles 220 are negatively polarized, when the pixel unit 110 displays a black image, the current-carrying sand particles 220 will move closer to the electronic paper display panel 100, while when the pixel unit 110 displays a white image, the current-carrying sand particles 220 will move away from the electronic paper display panel 100.

[0038] In this way, when the pixel unit 110 displays a white image, the current-charged sand particles 220 move away from the electronic paper display panel 100 under the repulsion of the negative voltage, reducing the obstruction of light in that area and making the white image brighter. Only when the pixel unit 110 displays a black image, the current-charged sand particles 220 move closer to the electronic paper display panel 100 under the attraction of the positive voltage. This can reduce the uncertainty caused by irregular movement away from and closer to the electronic paper display panel 100, improve the display effect of the electronic paper display device 10, and at the same time retain the ability for the current-charged sand particles 220 to move perpendicular to the electronic paper display panel 100 during their fall, thus creating a sense of depth in the falling sand particles 220.

[0039] To further reduce the impact of charged sand particles 220 on the screen of the electronic paper display panel 100, this application also sets up a mesh-like flowing sand control electrode 310 in a specific area, specifically: Figure 4 This is a plan view of a mesh-like quicksand control electrode according to an embodiment of this application. Figure 5 This is a cross-sectional schematic diagram of a mesh-like quicksand control electrode according to an embodiment of this application, as shown below. Figures 4-5 As shown, the distance between two adjacent pixel electrodes 131 is defined as the pixel spacing region 160; the quicksand control electrode layer 300 includes a mesh-like quicksand control electrode 310, and the mesh-like quicksand control electrode 310 corresponds to the pixel spacing region 160.

[0040] Wherein, the mesh quicksand control electrode 310 corresponds to the pixel spacing region 160, which can be understood to mean that the orthographic projection of the pixel spacing region 160 is the orthographic projection covering the mesh quicksand control electrode 310.

[0041] In this way, an oblique electric field will be formed between the mesh-like sand control electrode 310 and the pixel electrode 131. When the pixel unit 110 displays a white image, the current-carrying sand particles 220 move away from the electronic paper display panel 100 under the repulsion of the negative voltage and move towards the pixel spacing area 160, thereby further reducing the impact of the current-carrying sand particles 220 on the image of the electronic paper display panel 100.

[0042] Figure 6 This is a schematic diagram of a quicksand cavity according to an embodiment of this application, as shown below. Figure 6 As shown, the quicksand control electrode layer 300 includes an upper electrode 331 and a lower electrode 332. The upper electrode 331 and the lower electrode 332 are respectively disposed on both sides of the quicksand cavity 200. The upper electrode 331 and the lower electrode 332 are used to control the falling speed of the current-carrying sand particles 220.

[0043] It is understood that the upper electrode 331 and the lower electrode 332 are located on both sides of the quicksand cavity 200, and in the falling direction of the current-carrying sand particles 220, since the falling of the current-carrying sand particles 220 is subject to their own gravity and the frictional force of the opposite quicksand oil 210, the falling speed of the current-carrying sand particles 220 can be controlled by forming an electric field between the upper electrode 331 and the lower electrode 332.

[0044] More importantly, after the current-carrying sand particles 220 fall to the bottom, the electronic paper display panel 100 needs to be inverted to reset the current-carrying sand particles 220. At this time, an electric field can be formed between the upper electrode 331 and the lower electrode 332 to accelerate the reset speed of the current-carrying sand particles 220. After the current-carrying sand particles 220 are reset and the electronic paper display device 10 is reset, an electric field can be formed between the upper electrode 331 and the lower electrode 332 to keep the current-carrying sand particles 220 on the upper layer. Thus, when it is necessary to control the falling of the current-carrying sand particles 220, the electric field between the upper electrode 331 and the lower electrode 332 can be changed.

[0045] Example 2: Figure 7 This is a schematic diagram of an electronic paper display device according to a second embodiment of this application. Figure 8 This is a schematic diagram of a main area of ​​a second embodiment of this application, as shown below. Figures 7-8 As shown, unlike the first embodiment, in this embodiment, the common electrode layer 150 is located on the side of the pixel electrode layer 130 closer to the quicksand control electrode layer 300; and the quicksand control electrode layer 300 includes a plurality of quicksand control electrodes 321 arranged in a matrix, specifically: The electronic paper display panel 100 includes an active switching layer 120, a pixel electrode layer 130, an electronic paper layer 140, and a common electrode layer 150. The active switching layer 120, the pixel electrode layer 130, the electronic paper layer 140, and the common electrode layer 150 are arranged sequentially, and the common electrode layer 150 is located on the side of the pixel electrode layer 130 that is close to the sand control electrode layer 300.

[0046] The quicksand control electrode layer 300 includes a plurality of quicksand control electrodes 321 and a plurality of quicksand active switches 322. The plurality of quicksand control electrodes 321 are arranged in a matrix, and the quicksand active switches 322 are connected to the quicksand control electrodes 321 one by one.

[0047] Since the quicksand control electrode layer 300 includes multiple individually controllable quicksand control electrodes 321, the path of the falling quicksand particles 220 can be controlled by controlling the quicksand control electrodes 321 when the current-carrying sand particles 220 fall.

[0048] It can be understood that charging the flowing sand control electrode 321 can be achieved by setting up data lines and scan lines arranged in a vertical and horizontal pattern. The data lines are connected to the source of the flowing sand active switch 322, the drain of the flowing sand active switch 322 is connected to the flowing sand control electrode 321, and the scan lines are connected to the gate of the flowing sand active switch 322, thereby charging the flowing sand control electrode 321 line by line through the data lines and scan lines.

[0049] For example, in a row of three sequentially adjacent sand control electrodes 321, the middle sand control electrode 321 is charged with a voltage of the same polarity as the current-carrying sand particles 220, and the two side sand control electrodes 321 are charged with a voltage of the opposite polarity to the current-carrying sand particles 220. This causes the current-carrying sand particles 220 that originally fell from the middle sand control electrode 321 to move to the left and right.

[0050] For example, the electronic paper display device 10 includes a main area 171 and a surrounding area 172. The main area 171 is used to display the focus image, and the surrounding area 172 is used to display the background image. When the electronic paper display device 10 displays a picture of a person, the area where the person is located can be the main area 171, and the area where the background of the person is located can be the surrounding area 172.

[0051] This allows the movement of the current-carrying sand particles 220 to be controlled by inputting a voltage of the same polarity as the current-carrying sand particles 220 to the sand control electrode 321 in the main region 171 row by row along the falling direction of the current-carrying sand particles 220; and by inputting a voltage of the opposite polarity to the sand control electrode 321 in the surrounding region 172 row by row along the falling direction of the current-carrying sand particles 220.

[0052] This results in fewer charged sand particles 220 falling in the main area 171 and more charged sand particles 220 falling in the surrounding area 172, thereby further enriching the display performance of the electronic paper display device 10 while reducing the impact of charged sand particles 220 on the display screen.

[0053] See Figure 7 One of the quicksand control electrodes 321 can correspond to multiple pixel units 110, that is, the orthographic projection of one quicksand control electrode 321 covers multiple pixel units 110.

[0054] Of course, one of the aforementioned quicksand control electrodes 321 can correspond to one pixel unit 110, that is, the orthographic projection of one quicksand control electrode 321 covers one pixel unit 110. Specifically: Figure 9 This is a schematic diagram showing a one-to-one correspondence between a pixel unit and a flow sand control electrode according to the second embodiment of this application, as shown below. Figure 9 As shown, the electronic paper display panel 100 includes a plurality of pixel units 110, which are arranged in a matrix; the plurality of flow sand control electrodes 321 correspond one-to-one with the plurality of pixel units 110.

[0055] By having multiple sand control electrodes 321 corresponding one-to-one with multiple pixel units 110, the falling path of the current-carrying sand particles 220 outside each pixel unit 110 can be controlled, thereby further improving the fineness and display effect of the displayed image.

[0056] Figure 10 This is a schematic diagram of a control method for an electronic paper display device according to an embodiment of this application, as shown below. Figure 10 As shown, this application also discloses a control method for an electronic paper display device. The control method for the electronic paper display device 10 includes the following steps: Sa1: Detects whether an enable command has been received; Sa2: Upon receiving an activation command, a control voltage is input to the quicksand control electrode layer to control the movement of the current-carrying sand particles.

[0057] This application provides a sand cavity 200 on the light-emitting surface of the electronic paper display panel 100, with the sand oil 210 and the current-carrying sand particles 220 filling the sand cavity 200. A sand control electrode layer 300 is provided outside the sand cavity 200, which is equivalent to the current-carrying sand particles 220 serving as the foreground layer and the electronic paper display panel 100 serving as the background layer. The background of the sand layer can be updated in real time by changing the screen of the electronic paper display panel 100.

[0058] Furthermore, upon receiving an activation command, a control voltage is input to the sand control electrode layer 300 to control the movement of the current-carrying sand particles 220, thereby affecting the falling path of the current-carrying sand particles 220. This enriches the display performance of the electronic paper display device 10 while reducing the impact of the current-carrying sand particles 220 on the display screen.

[0059] Figure 11 This is a schematic diagram of a method for controlling the path of electrically charged sand particles according to an embodiment of this application, combined with... Figure 11 As shown, the electronic paper display device 10 includes a main area 171 and a surrounding area 172. The main area 171 is used to display the focus image, and the surrounding area 172 is used to display the background image. The quicksand control electrode layer 300 includes multiple quicksand control electrodes 321 and multiple quicksand active switches 322. The multiple quicksand control electrodes 321 are arranged in a matrix, and the quicksand active switches 322 are connected to the quicksand control electrodes 321 one by one. The falling direction of the current-carrying sand particles 220 is defined as the first direction.

[0060] The step of Sa2, which inputs a control voltage to the quicksand control electrode layer to control the movement of the current-carrying sand particles upon receiving an activation command, includes: Sa21: Upon receiving an activation command, a voltage of the same polarity as the charged sand particles is input to the quicksand control electrode in the main area, row by row, along the first direction. Sa22: Input a voltage of opposite polarity to the current-carrying sand particles to the sand control electrode in the surrounding area row by row along the first direction to control the movement of the current-carrying sand particles.

[0061] It is understandable that, for example, when the electronic paper display device 10 displays a picture of a person, the area where the person is located can be the main area 171, and the area where the background of the person is located can be the surrounding area 172.

[0062] Here, the movement of the current-carrying sand particles 220 can be controlled by inputting a voltage of the same polarity as the current-carrying sand particles 220 to the sand control electrode 321 in the main area 171 row by row along the falling direction of the current-carrying sand particles 220; and by inputting a voltage of the opposite polarity to the current-carrying sand particles 220 to the sand control electrode 321 in the surrounding area 172 row by row along the falling direction of the current-carrying sand particles 220.

[0063] This allows for a smaller number of charged sand particles 220 falling in the main area 171, while a larger number of charged sand particles 220 falling in the surrounding area 172. This further enhances the display performance of the electronic paper display device 10 while reducing the impact of charged sand particles 220 on the display screen.

[0064] Figure 12 This is a schematic diagram of a preparation area according to an embodiment of this application, in conjunction with... Figure 12 As shown, the electronic paper display device 10 also includes a preparation area 173, which is located above the main area 171. A second direction is defined as the direction along the main area 171 toward the preparation area 173. Along the second direction, the number of each row of the quicksand control electrodes 321 in the preparation area 173 gradually decreases.

[0065] Sa21: Upon receiving an activation command, the step of inputting a voltage of the same polarity as the charged sand particles to the quicksand control electrode in the main region row by row along the first direction includes: Sa211: Upon receiving an activation command, a voltage of the same polarity as the charged sand particles is input to the sand control electrode in the preparation area row by row along the first direction; Sa212: Input a voltage of the same polarity as the current-carrying sand particles to the quicksand control electrode in the main region row by row along the first direction.

[0066] Along the direction from the main region 171 toward the preparation region 173, the number of the quicksand control electrodes 321 in each row of the preparation region 173 gradually decreases; simply put, the width of the preparation region 173 decreases from bottom to top.

[0067] In this way, the current-carrying sand particles 220 will pass through the preparation area 173 before falling into the main area 171. In the preparation area 173, a voltage of the same polarity as the current-carrying sand particles 220 is input to the sand control electrode 321 in the preparation area 173 row by row along the first direction. This can cause the falling current-carrying sand particles 220 to run to the side in advance, thereby further reducing the number of current-carrying sand particles 220 falling in the main area 171, thereby improving the display effect of the electronic paper display device 10.

[0068] Figure 13 This is a schematic flowchart of a method for manufacturing an electronic paper display device according to an embodiment of this application. Figure 14 This is a process diagram illustrating a method for manufacturing an electronic paper display device according to an embodiment of this application, as shown below. Figures 13-14As shown, this application also discloses a method for manufacturing an electronic paper display device. The method for manufacturing an electronic paper display device 10 includes the following steps: Sb1: A quicksand cavity is provided on one side of the light-emitting surface of the electronic paper display panel; Sb2: The quicksand cavity is filled with quicksand oil and electrically charged sand particles; Sb3: A flow sand control electrode layer is formed on the side of the flow sand cavity opposite to the electronic paper display panel.

[0069] By setting a quicksand cavity 200 on the light-emitting surface of the electronic paper display panel 100, the quicksand oil 210 and the current-charged sand particles 220 are filled in the quicksand cavity 200, and a quicksand control electrode layer 300 is set outside the quicksand cavity 200. This is equivalent to the current-charged sand particles 220 serving as the foreground layer and the electronic paper display panel 100 serving as the background layer. The background of the quicksand layer can be updated in real time by changing the screen of the electronic paper display panel 100.

[0070] Furthermore, upon receiving an activation command, a control voltage is input to the sand control electrode layer 300 to control the movement of the current-carrying sand particles 220, thereby affecting the falling path of the current-carrying sand particles 220. This enriches the display performance of the electronic paper display device 10 while reducing the impact of the current-carrying sand particles 220 on the display screen.

[0071] Alternatively, the quicksand cavity 200 can be prepared separately, and quicksand oil 210 and current-carrying sand particles 220 can be filled into the quicksand cavity 200. Then, a quicksand control electrode layer 300 can be set on the quicksand cavity 200 to form a quicksand layer. Finally, the quicksand layer and the electronic paper display panel 100 can be encapsulated together.

[0072] It should be noted that the limitations on each step involved in this solution are not considered as limiting the order of steps, provided that they do not affect the implementation of the specific solution. The steps listed first can be executed first, later, or even simultaneously. As long as this solution can be implemented, it should be considered to fall within the scope of protection of this application.

[0073] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0074] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. An electronic paper display device, characterized in that, The electronic paper display device includes an electronic paper display panel, a sand-filled cavity, sand-filled oil, electrically charged sand particles, and a sand-filled control electrode layer. The sand-filled cavity is disposed on the light-emitting surface of the electronic paper display panel. The sand-filled oil and the electrically charged sand particles are both disposed within the sand-filled cavity. The sand-filled control electrode layer is disposed on the side of the sand-filled cavity opposite to the electronic paper display panel, and is used to control the movement of the electrically charged sand particles.

2. The electronic paper display device according to claim 1, characterized in that, The electronic paper display panel includes an active switch layer, a pixel electrode layer, an electronic paper layer, and a common electrode layer. The active switch layer, the pixel electrode layer, the electronic paper layer, and the common electrode layer are arranged sequentially. The active switch layer includes multiple pixel active switches, and the pixel electrode layer includes multiple pixel electrodes. The multiple pixel active switches are connected to the multiple pixel electrodes one by one. The quicksand cavity is located on the side of the active switch layer away from the electronic paper layer. The current-carrying sand particles are negatively polarized.

3. The electronic paper display device according to any one of claims 2, characterized in that, The distance between two adjacent pixel electrodes is defined as the pixel spacing region; the quicksand control electrode layer includes a mesh-like quicksand control electrode, and the mesh-like quicksand control electrode corresponds to the pixel spacing region.

4. The electronic paper display device according to claim 1, characterized in that, The electronic paper display panel includes an active switch layer, a pixel electrode layer, an electronic paper layer, and a common electrode layer. The active switch layer, the pixel electrode layer, the electronic paper layer, and the common electrode layer are arranged sequentially, and the common electrode layer is located on the side of the pixel electrode layer close to the quicksand control electrode layer. The quicksand control electrode layer includes multiple quicksand control electrodes and multiple quicksand active switches. The multiple quicksand control electrodes are arranged in a matrix, and the quicksand active switches are connected to each of the quicksand control electrodes.

5. The electronic paper display device according to claim 4, characterized in that, The electronic paper display panel includes multiple pixel units, which are arranged in a matrix; the multiple sand control electrodes correspond one-to-one with the multiple pixel units.

6. The electronic paper display device according to claim 1, characterized in that, The quicksand control electrode layer includes an upper electrode and a lower electrode, which are respectively disposed on both sides of the quicksand cavity. The upper electrode and the lower electrode are used to control the falling speed of the current-carrying sand particles.

7. A control method for an electronic paper display device, characterized in that, The control method for the electronic paper display device is used to control the electronic paper display device as described in any one of claims 1-6, and the control method for the electronic paper display device includes the following steps: Check if an enable command has been received; Upon receiving an activation command, a control voltage is input to the quicksand control electrode layer to control the movement of the current-carrying sand particles.

8. The control method for the electronic paper display device according to claim 7, characterized in that, The electronic paper display device includes a main area and a surrounding area. The main area is used to display the focus image, and the surrounding area is used to display the background image. The quicksand control electrode layer includes multiple quicksand control electrodes and multiple quicksand active switches. The multiple quicksand control electrodes are arranged in a matrix, and the quicksand active switches are connected to the quicksand control electrodes one by one. The direction of the fall of the charged sand particles is defined as the first direction; The step of inputting a control voltage to the quicksand control electrode layer and controlling the movement of the current-carrying sand particles upon receiving an activation command includes: Upon receiving the activation command, a voltage of the same polarity as the charged sand particles is input to the quicksand control electrode in the main area row by row along the first direction; A voltage of opposite polarity to that of the current-carrying sand particles is input row by row along the first direction to the sand control electrode in the surrounding area to control the movement of the current-carrying sand particles.

9. The control method for the electronic paper display device according to claim 8, characterized in that, The electronic paper display device further includes a preparation area located above the main area. A second direction is defined as the direction along the main area toward the preparation area. Along the second direction, the number of the sand control electrodes in each row within the preparation area gradually decreases. The step of inputting a voltage of the same polarity as the charged sand particles to the quicksand control electrode in the main area row by row along the first direction upon receiving an activation command includes: Upon receiving an activation command, a voltage of the same polarity as the charged sand particles is input row by row to the sand control electrode in the preparation area along the first direction; A voltage of the same polarity as the current-carrying sand particles is input row by row to the quicksand control electrode in the main region.

10. A method for manufacturing an electronic paper display device, characterized in that, The method for preparing the electronic paper display device is used to prepare the electronic paper display device as described in any one of claims 1-6, and the method for preparing the electronic paper display device includes the following steps: A quicksand cavity is set on one side of the light-emitting surface of the electronic paper display panel; The quicksand cavity is filled with quicksand oil and electrically charged sand particles; A flow sand control electrode layer is formed on the side of the flow sand cavity opposite to the electronic paper display panel.

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