Electronic paper display device and driving method

Abstract

The application discloses an electronic paper display device and a driving method, and relates to the technical field of electronic paper display technology.The electronic paper display device comprises a driving assembly and a display unit, the driving assembly is arranged on the side away from the display surface of the display unit, the driving assembly comprises a scanning unit, the scanning unit comprises a base material, a pixel electrode layer arranged on the base material and a thin film transistor connected to the pixel electrode layer; when a preset distance is formed between the scanning unit and the display unit, a driving electric field is formed between the scanning unit and the display unit, and the display unit displays an image; through the above design, the cost is low, and the product yield is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic paper display, in particular to an electronic paper display device and a driving method. BACKGROUND

[0002] In the electronic paper display (EPD) technology industry, the electronic paper display device is generally composed of an electrophoretic layer and a TFT (Thin Film Transistor) driving electrode matrix layer which are stacked in a top-bottom manner. When the frame is changed, the charged particles in the electrophoretic layer are controlled to move in the vertical direction by the TFT electrode attached to the bottom layer to generate a gray scale effect.

[0003] The biggest feature of the electronic paper display device is the bistable characteristic, which only needs to be driven when the picture is switched, and the image can be maintained for a long time without charging. The resolution of the electronic paper depends on the resolution of the driving electrode matrix, and the electrophoretic layer does not need to be assembled in particular alignment with the electrode.

[0004] However, in the existing electronic paper display device, the TFT substrate needs a high-cost photolithography process, which has high cost and low yield, especially when preparing a large-area TFT substrate, one particle may cause the entire panel to be scrapped, and the yield reduction effect is obvious. SUMMARY

[0005] The purpose of the present application is to provide an electronic paper display device and a driving method with low cost and improved product yield.

[0006] The present application discloses an electronic paper display device, comprising a driving assembly and a display unit, the driving assembly is arranged on the side away from the display surface of the display unit, the driving assembly comprises a scanning unit, the scanning unit comprises a substrate, a pixel electrode layer arranged on the substrate, and a thin film transistor connected to the pixel electrode layer; wherein when a preset distance is formed between the scanning unit and the display unit, a driving electric field is formed between the scanning unit and the display unit, and the display unit displays an image.

[0007] Optionally, the driving assembly further comprises a displacement control unit, the displacement control unit is arranged on the side away from the display surface of the display unit, and the displacement control unit is connected to at least the scanning unit for driving the scanning unit to move.

[0008] Optionally, the size of the scanning unit is smaller than the size of the display area of the display unit; wherein the size of the scanning unit is H, the size of the display area of the display unit is N, and the positioning overlap area of the scanning unit and the display area is C, wherein H=1 / N+C, and the value of N+C is a natural number greater than or equal to 2.

[0009] Optionally, the driving assembly further comprises a control circuit board, the control circuit board is connected with the scanning unit and the displacement control unit respectively; the display unit comprises a plurality of display areas; the displacement control unit moves the scanning unit to the display area represented by the control signal of the control circuit board and sticks to it according to the control signal; the scanning unit drives the thin film transistor and the pixel electrode layer to apply driving electric field to the display unit to form a picture according to the driving signal of the control circuit board.

[0010] Optionally, the displacement control unit comprises a first direction control module and a second direction control module, the control circuit board is connected with the first direction control module and the second direction control module respectively, the first direction control module and the second direction control module are connected with the scanning unit respectively, the first direction control module receives the first direction control signal of the control circuit board to drive the scanning unit to move along the first direction, and the second direction control module receives the second direction control signal of the control circuit board to drive the scanning unit to move along the second direction.

[0011] Optionally, the displacement control unit comprises a first displacement control unit and a second displacement control unit, the first displacement control unit is connected with the display unit, and the second displacement control unit is connected with the scanning unit; the first direction control module and the second direction control module are arranged on the second displacement control unit; the first displacement control unit comprises a driving motor, a first connecting roller, a second connecting roller and a connecting belt, the first connecting roller is arranged opposite to the second connecting roller, the connecting belt is wound on the first connecting roller and the second connecting roller respectively, and the display unit is fixedly connected with the connecting belt; the driving motor is electrically connected with the control circuit board; the second displacement control unit comprises a first motor, a second motor, a third motor, a first moving rod, a second moving rod, a first driving rod and a second driving rod, the first moving rod and the second moving rod are arranged side by side, the first motor is connected with the first moving rod, the second motor is electrically connected with the second moving rod, the first driving rod is arranged perpendicularly to the first moving rod and the second moving rod respectively, and the two ends of the first driving rod are movably connected with the first moving rod and the second moving rod respectively, the second driving rod and the third motor are arranged on the first driving rod respectively, the third motor is electrically connected with the second driving rod, and the display unit is connected with the first driving rod and the second driving rod respectively; the first direction control module is electrically connected with the third motor, and the second direction control module is electrically connected with the first motor and the second motor respectively; the driving motor drives the first connecting roller and the second connecting roller to rotate according to the first control signal of the control circuit board, the connecting belt drives the display unit to move the display area represented by the first control signal to a position corresponding to the scanning unit, and the first motor, the second motor and the third motor move the scanning unit to tightly adhere to the display area represented by the first control signal according to the first control signal of the control circuit board.

[0012] Optionally, the scanning unit further comprises a protective layer, the protective layer is arranged on the side of the pixel electrode layer away from the substrate; the pixel electrode layer comprises a plurality of arrayed pixel electrodes, the spacing between adjacent pixel electrodes is equal; wherein the substrate is made of glass material, and the protective layer is made of high-strength material; the display unit comprises a substrate and a common electrode layer, an electronic ink layer and a protective film layer stacked on the substrate in sequence; the protective film layer is arranged opposite to the protective layer, the substrate is made of flexible transparent material, and the protective film layer is made of polyimide or fluorine material.

[0013] Optionally, the scanning unit is detachable, and the scanning unit comprises a first scanning head and a second scanning head arranged side by side; an area of a pixel electrode layer of the first scanning head is greater than an area of a pixel electrode layer of the second scanning head; or a size of the first scanning head is greater than a size of the second scanning head.

[0014] The application further discloses a driving method for the electronic paper display device.

[0015] According to the preset control rule, the driving assembly drives the scanning unit to be close to a display area of the display unit that needs to be displayed, a driving electric field is formed between the scanning unit and the display unit, and the display area displays an image.

[0016] Optionally, before the step of driving the scanning unit to be close to the display area of the display unit that needs to be displayed according to the preset control rule, the driving assembly drives the scanning unit to be close to a display area of the display unit that needs to be displayed, a driving electric field is formed between the scanning unit and the display unit, and the display area displays an image, the method further comprises the following steps.

[0017] The display area of the display unit is divided into a plurality of sub-display areas, and the plurality of sub-display areas are numbered;

[0018] The preset control rule is generated according to the number of the sub-display areas;

[0019] The control circuit board generates a plurality of control signals according to the preset control rule;

[0020] The step of driving the scanning unit to be close to the display area of the display unit that needs to be displayed according to the preset control rule, the driving assembly drives the scanning unit to be close to a display area of the display unit that needs to be displayed, a driving electric field is formed between the scanning unit and the display unit, and the display area displays an image.

[0021] The first displacement unit drives the display unit to move the sub-display area corresponding to the first control signal to a preset position according to the first control signal of the control circuit board;

[0022] The second displacement unit drives the scanning unit to move to and be close to the sub-display area corresponding to the first control signal according to the first control signal of the control circuit board, a driving electric field is formed between the scanning unit and the sub-display area corresponding to the first control signal, and the sub-display area corresponding to the first control signal displays an image;

[0023] The above steps are repeated until all the sub-display areas display images.

[0024] Compared to existing technologies that combine electrophoretic layers and TFT driving electrode matrix layers in an upper and lower manner to form an electronic paper display device, the electronic paper display device of this application includes a driving component and a display unit. The driving component is disposed on the display surface away from the display unit. The driving component includes a scanning unit, which includes a substrate, a pixel electrode layer disposed on the substrate, and a thin-film transistor connected to the pixel electrode layer. When the scanning unit is in close contact with the display unit, a driving electric field is formed between the scanning unit and the display unit, and the display unit displays an image. That is, the display unit and the driving component are fabricated independently. Only the scanning unit in the driving component needs to be fabricated by photolithography, thereby reducing the risk of scrapping the display unit during the fabrication process, reducing costs, and improving product yield. Attached Figure Description

[0025] 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:

[0026] Figure 1 This is a schematic diagram of the electronic paper display device provided in this application;

[0027] Figure 2 yes Figure 3 A magnified schematic diagram of a portion of region A in the middle;

[0028] Figure 3 yes Figure 2 A schematic diagram of the film structure of the scanning unit and the display unit;

[0029] Figure 4 yes Figure 2 A schematic diagram of the structure in which the scanning unit moves along the Y direction;

[0030] Figure 5 This is a schematic diagram of the structure of the two scanning units and the display unit cooperating according to the first embodiment of this application;

[0031] Figure 6 This application provides a flowchart illustrating the steps of the driving method.

[0032] Figure 7 yes Figure 6 A flowchart illustrating the steps preceding step S1;

[0033] Figure 8 yes Figure 6 A flowchart illustrating the further steps of step S1;

[0034] Figure 9 is Figure 8 The schematic diagram of the step flow before step S12 in the method;

[0035] Figure 10 is Figure 9 The schematic diagram of the further step flow of step S14;

[0036] Figure 11 The structural schematic diagram of the scanning unit and the display unit of the second embodiment of the present application.

[0037] Wherein, 10, electronic paper display device; 100, driving assembly; 110, scanning unit; 111, base material; 112, pixel electrode layer; 113, thin film transistor; 114, protective layer; 115, first scanning head; 116, second scanning head; 117, pixel electrode; 120, displacement control unit; 121, first displacement control unit; 122, second displacement control unit; 123, driving motor; 124, first connecting roller; 125, second connecting roller; 126, connecting belt; 127, first motor; 128, second motor; 129, third motor; 130, first moving rod; 131, second moving rod; 132, first driving rod; 133, second driving rod; 134, first direction control module; 135, second direction control module; 140, control circuit board; 200, display unit; 210, substrate; 220, common electrode layer; 230, electronic ink layer; 240, protective film layer; 250, color resistance layer; 300, fixing member; 310, first fixing member; 320, second fixing member; 400, first detection electrode; 410, second detection electrode. DETAILED DESCRIPTION

[0038] It should be understood that the terms used herein, the specific structure and functional details of the disclosure, are only for the purpose of describing specific embodiments, and are representative, but the present application can be embodied in many alternative forms, and should not be interpreted as being limited to the embodiments described herein.

[0039] In the description of the present application, the terms "first", "second" are only used for description purposes, and cannot be understood as indicating relative importance, or implying the number of the indicated technical features. Therefore, unless otherwise specified, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; the meaning of "multiple" is two or more. In addition, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "second direction", "first direction", etc. are described based on the orientation or relative position relationship shown in the drawings, and are only for the convenience of the simplified description of the present application, and cannot be understood as indicating that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Figure 1 is a structural schematic diagram of an electronic paper display device provided by the present application, Figure 2 is Figure 3 is a partial enlarged structural schematic diagram of the A area in Figure 3 is Figure 2 is a film layer structural schematic diagram of the scanning unit and the display unit of Figure 4 is Figure 2 is a structural schematic diagram of the scanning unit of Figures 1-4 As shown in The present application discloses an electronic paper display device 10, comprising a driving assembly 100 and a display unit 200, the driving assembly 100 is arranged on the side away from the display surface of the display unit 200, the driving assembly 100 comprises a scanning unit 110, the scanning unit 110 comprises a substrate 111, a pixel electrode layer 112 arranged on the substrate 111 and a thin film transistor 113 connected to the pixel electrode layer 112; wherein when a preset distance is formed between the scanning unit 110 and the display unit 200, a driving electric field is formed between the scanning unit 110 and the display unit 200, and the display unit 200 displays an image.

[0041] Compared with the prior art, the electronic paper display device 10 of the application is combined in a manner of stacking the electrophoretic layer and the TFT driving electrode matrix layer, the driving assembly 100 of the electronic paper display device 10 is arranged on the side away from the display surface of the display unit 200, the driving assembly 100 comprises a scanning unit 110, the scanning unit 110 comprises a substrate 111, a pixel electrode layer 112 arranged on the substrate 111 and a thin film transistor 113 connected to the pixel electrode layer 112, and when a preset distance is formed between the scanning unit 110 and the display unit 200, a driving electric field is formed between the scanning unit 110 and the display unit 200, and the display unit 200 displays an image; that is, the display unit 200 and the driving assembly 100 are independently prepared, so that only the scanning unit 110 in the driving assembly 100 needs to be prepared by a photolithography process, thereby reducing the risk of scrapping of the display unit 200 in the preparation process, reducing the cost and improving the product yield.

[0042] The application will be described in detail below with reference to the drawings and optional embodiments.

[0043] First embodiment:

[0044] As shown in Figure 2 , the pixel electrode layer 112 comprises a plurality of pixel electrodes 117 arranged in an array, and the distance between adjacent pixel electrodes 117 is equal, so that the scanning unit 110 drives the display unit 200 to display a complete image with high resolution. The scanning unit 110 further comprises a protective layer 114 arranged on the side of the pixel electrode layer 112 away from the substrate 111; the substrate 111 is made of glass material, and the protective layer 114 is made of high-strength material, such as hardened polymer film, ultra-thin glass, scratch-resistant coating material, etc., for protecting the surface of the scanning unit 110 in contact with the display unit 200; the display unit 200 comprises a substrate 210 and a common electrode layer 220, an electronic ink layer 230 and a protective film layer 240 stacked in sequence on the substrate 210; the substrate 210 is a flexible transparent substrate, and the protective film layer 240 is made of polyimide or Teflon material. The electronic ink layer 230 is an electrophoretic layer of microcapsule particles.

[0045] As shown in Figure 3 , the display unit 200 can further be provided with a color resistance layer 250 arranged between the electronic ink layer and the protective film layer 240, wherein the color resistance layer 250 can be a pixel group color resistance layer 250 or a block-shaped pre-prepared area color resistance layer 250 for cooperating with the driving to display a color picture.

[0046] The preset distance can be 0.03mm-1mm, as Figure 1As shown, the driving assembly 100 further comprises a displacement control unit 120, which is arranged at a side away from the display surface of the display unit 200, and is connected with the scanning unit 110 at least, for driving the scanning unit 110 to move, so that the scanning unit 110 can be controlled to move to the display area required by the display unit 200, and then reach a preset distance with the display area required to be displayed, so as to drive the display area to display the picture, which is flexible in operation; of course, when the scanning unit 110 is driven to be close to the display area required to be displayed, i.e. the preset distance is 0, the voltage of the pixel electrode layer 112 is most stable, and the display effect is best.

[0047] In the preset distance, the size of the preset distance is equal to the thickness of the protective film layer 240, and in the case that the thickness of the protective film layer 240 is not uniform or the protective film layer 240 is not arranged, the above-mentioned preset distance between the scanning unit 110 and the display unit 200 can also form an electric field, but there may be a case that the voltage of the pixel electrode layer 112 is unstable, at this time, at least one first detection electrode can be arranged on the scanning unit 110, and a second detection electrode corresponding to the first detection electrode is arranged on the display unit 200, wherein the orthographic projection of the second detection electrode on the scanning unit completely covers the orthographic projection of the first detection electrode on the scanning unit, so that after the second detection electrode and the first detection electrode are aligned, the capacitance can be automatically measured, the dielectric condition in the preset distance is obtained, and according to the dielectric condition, the voltage required to be given to the pixel electrode layer is determined, so as to real-time adjust the voltage of the pixel electrode, so as to adapt to the non-uniform protective film thickness or distance, and achieve the purpose of uniform display. Of course, the first detection electrode can also be arranged on the display unit, and the second detection electrode is arranged on the scanning unit.

[0048] The size of the scanning unit 110 can be smaller than the size of the display area of the display unit 200, so as to further reduce the manufacturing cost. The size of the scanning unit 110 is H, the size of the display area of the display unit 200 is N, and the positioning overlap area of the scanning unit 110 and the display area is C, wherein H = 1 / N+C, and the value of N+C is a natural number greater than or equal to 2. That is, the display area of the display unit 200 can be divided into multiple sub-display areas, and the total area of the pixel electrode 117 of the scanning unit 110 corresponds to the total area of the common electrode of each sub-display area. The scanning unit 110 is driven to scan and drive the sub-display areas respectively, until the entire display area of the display unit 200 completes the display of the image. The more the number of sub-display areas is, the better. For example, the electronic paper display device 10 is applied to an outdoor poster advertising position. When the outdoor poster advertising position updates the advertising image, it can be refreshed slowly, and it is appropriate to change a picture in several minutes, or to update at night, so that it is not necessary to update in the daytime, thereby improving the efficiency. Of course, the size of the scanning unit 110 can be the same as the size of the display area of the display unit 200, so that only one driving is required.

[0049] The positioning overlap area can be the outer circle part of the display area without the pixel electrode layer 112 of the scanning head and the part that can overlap the display image. Since the scanning unit 110 is relatively small, the display image of the display unit 200 needs to be completed by splicing the image, and there is generally an image overlap area to avoid the appearance of the splicing seam of the image.

[0050] Specifically, as shown in FIG. 2, the display unit 200 is divided into multiple sub-display areas, and the scanning unit 110 is driven to scan and drive the sub-display areas respectively, until the entire display area of the display unit 200 completes the display of the image. Figure 1As shown, the driving assembly 100 further comprises a control circuit board 140 connected with the scanning unit 110 and the displacement control unit 120 respectively; the display unit 200 can comprise a first display area and a second display area; the displacement control unit 120 moves the scanning unit 110 to the first display area and closely adheres to the first display area according to the control signal of the control circuit board 140; the scanning unit 110 drives the thin film transistor 113 and the pixel electrode layer 112 to apply driving electric field to the first display area according to the driving signal of the control circuit board 140, and the first display area displays image picture; then, the displacement control unit 120 moves the scanning unit 110 to the second display area and closely adheres to the second display area according to the control signal of the control circuit board 140, so as to complete image display of the second display area. Of course, when the display area of the display unit 200 is three or more than three, the scanning unit 110 can be continuously driven to move to the corresponding display area.

[0051] In addition, the displacement control unit 120 comprises a first direction control module 134 and a second direction control module 135, the control circuit board 140 is in electrical signal connection with the first direction control module 134 and the second direction control module 135 respectively, the first direction control module 134 and the second direction control module 135 are in electrical signal connection with the scanning unit 110 respectively, the first direction control module 134 receives the first direction control signal of the control circuit board 140 to drive the scanning unit 110 to move in the first direction, and the second direction control module 135 receives the second direction control signal of the control circuit board 140 to drive the scanning unit 110 to move in the second direction. Wherein, the first direction can be horizontal movement towards or away from the display unit 200, and the second direction can be horizontal movement parallel to the display unit 200, so that the movement direction of the scanning unit 110 can be adjusted by the first direction control module 134 and the second direction control module 135, so as to adjust the corresponding accuracy of the display area of the display unit 200.

[0052] In order to further improve the precision of the display area of the scanning unit 110 and the display unit 200, the display unit 200 can be driven to move for corresponding adjustment. Specifically, the displacement control unit 120 includes a first displacement control unit 121 and a second displacement control unit 122. The first displacement control unit 121 is connected with the display unit 200, and the second displacement control unit 122 is connected with the scanning unit 110. The first displacement control unit 121 includes a driving motor 123, a first connecting roller 124, a second connecting roller 125, and a connecting belt 126. The first connecting roller 124 is arranged opposite to the second connecting roller 125. The connecting belt 126 is wound around the first connecting roller 124 and the second connecting roller 125, respectively. The display unit 200 is fixedly connected with the connecting belt 126. The driving motor 123 is electrically connected with the control circuit board 140.

[0053] As shown in Figure 1 The second displacement control unit 122 includes a first motor 127, a second motor 128, a third motor 129, a first moving rod 130, a second moving rod 131, a first driving rod 132, and a second driving rod 133. The first moving rod 130 and the second moving rod 131 are arranged side by side. The first motor 127 is connected with the first moving rod 130. The second motor 128 is electrically connected with the second moving rod 131. The first driving rod 132 is arranged perpendicularly with respect to the first moving rod 130 and the second moving rod 131, respectively. The two ends of the first driving rod 132 are movably connected with the first moving rod 130 and the second moving rod 131, respectively. The second driving rod 133 and the third motor 129 are arranged on the first driving rod 132, respectively. The third motor 129 is electrically connected with the second driving rod 133. The display unit 200 is connected with the first driving rod 132 and the second driving rod 133, respectively. The first direction control module 134 is electrically connected with the third motor 129. The second direction control module 135 is electrically connected with the first motor 127 and the second motor 128, respectively.

[0054] The control circuit board 140 can include a first control signal and a second control signal, the first control signal representing a driving signal of the first display area, and the second control signal representing a driving signal of the second display area. The driving motor 123 drives the first connecting roller 124 and the second connecting roller 125 to rotate according to the first control signal of the control circuit board 140, and the connecting belt 126 drives the display unit 200 to move the first display area to a preset position. The first direction control module 134 receives the first control signal and drives the third motor 129 to drive the second driving rod 133, so that the scanning unit 110 moves in the first direction. The second direction control module 135 receives the first control signal and drives the first motor 127 to drive the first moving rod 130 and the second motor 128 to drive the second moving rod 131, so that the scanning unit 110 moves in the second direction and is tightly attached to the display area represented by the first control signal. The first display area displays an image. Similarly, the second display area displays an image. Figure 1 、 Figure 3 and Figure 4 It can be known that the first direction is the X direction, the second direction is the Y direction, and the moving direction of the first connecting roller 124 and the second connecting roller 125 is the Z direction.

[0055] The scanning unit is detachable and convenient to replace. Figure 5 is a structural schematic view of two scanning units cooperating with the display unit provided by the first embodiment of the present application, as Figure 5As shown, for the display unit 200 with a larger area, in order to improve work efficiency, the scanning unit 110 comprises the first scanning head 115 and the second scanning head 116 arranged side by side, and can drive the display image corresponding to the display area of the display unit 200 at the same time. In addition, the sizes of the two scanning heads can be set to be the same, and the area of the pixel electrode layer 112 of the first scanning head 115 is set to be larger than the area of the pixel electrode layer 112 of the second scanning head 116, so that the first scanning head 115 drives the display of a larger image, and the second scanning head 116 drives the display of a smaller image, and a specific display image combination or special-shaped image is formed according to the display requirement. Of course, the size of the first scanning head 115 is designed to be larger than the size of the second scanning head 116, and the area of the pixel electrode layer 112 of the first scanning head 115 is set to be larger than the area of the pixel electrode layer 112 of the second scanning head 116, which is also possible, and is not limited herein. Of course, when the sizes of the first scanning head 115 and the second scanning head 116 and the pixel electrode layer 112 are the same, the part of the pixel electrode 117 of the first scanning head 115 or the part of the electrode of the second scanning head 116 can be controlled to work to form the required image display. Of course, according to the area of the display unit 200, three or more scanning units 110 can also be provided.

[0056] As shown in the figure, Figure 1 The electronic paper display device 10 further comprises a fixing member 300 for fixing the driving assembly 100 and the display unit 200, the fixing member 300 comprises a first fixing member 310 and a second fixing member 320 arranged oppositely, the first connecting roller 124 is arranged in the first fixing member 310 and movably connected with the first fixing member 310, the second connecting roller 125 is arranged in the second fixing member 320 and movably connected with the second fixing member 320, the first moving rod 130 is connected with the first fixing member 310, and the second moving rod 131 is connected with the second fixing member 320; and the control circuit board 140 can be arranged on the first fixing member 310 or the second fixing member 320.

[0057] Figure 6 The driving method provided by the present application is shown in the step flowchart; as shown in the figure, Figure 6 The present application further discloses a driving method, using the electronic paper display device as described above, comprising the steps of:

[0058] S1: According to the preset control rule, the driving assembly drives the scanning unit to form a preset distance with the display area of the display unit which needs to display, and forms a driving electric field between the scanning unit and the display unit, and the display unit displays an image.

[0059] Figure 7 isFigure 6 the step of driving the scanning unit to abut against the display region of the display unit to be displayed according to the preset control rule, and forming a driving electric field between the scanning unit and the display unit, and displaying an image by the display region. Figure 7

[0060] S2: dividing the display region of the display unit into a plurality of sub-display regions, and numbering the plurality of sub-display regions;

[0061] S3: generating a numbering control rule in a preset order according to the numbering of the sub-display regions;

[0062] S4: generating a plurality of control signals by the control circuit board according to the numbering control rule in the preset order;

[0063] Figure 8 is Figure 6 the further step flow diagram of the step S1 in Figure 8 the step of driving the scanning unit to abut against the display region of the display unit to be displayed according to the preset control rule, and forming a driving electric field between the scanning unit and the display unit, and displaying an image by the display region, comprising:

[0064] S11: driving the display unit to move the sub-display region corresponding to the first control signal to a preset position according to the first control signal of the control circuit board by the first displacement unit;

[0065] S12: driving the scanning unit to abut against the sub-display region corresponding to the first control signal according to the first control signal of the control circuit board by the second displacement unit, forming a driving electric field between the scanning unit and the sub-display region corresponding to the first control signal, and displaying an image by the sub-display region corresponding to the first control signal;

[0066] S13: repeating the above steps until all the sub-display regions display images.

[0067] Of course, if it can also be driven according to the preset display region and driving logic, that is, according to a specific display region, such as the total display region is divided into four sub-display regions, first driving the first numbered region to display images, then driving the third numbered region to display images, then driving the second numbered region to display images, and finally driving the fourth numbered region to display images.

[0068] Figure 9 is Figure 8 the step flow diagram before the step S12 in Figure 9 ​As shown in the figure, the second displacement unit drives the scanning unit to be close to the sub-display area corresponding to the first control signal according to the first control signal of the control circuit board, a driving electric field is formed between the scanning unit and the sub-display area corresponding to the first control signal, and before the sub-display area corresponding to the first control signal displays an image, the method further comprises the steps of:

[0069] S14: The second displacement unit drives the scanning unit to move to the sub-display area corresponding to the first control signal in a preset direction according to the first control signal of the control circuit board.

[0070] Figure 10 is Figure 9 The further step flow chart of step S14 is shown in the figure, Figure 10 As shown in the figure, the step of driving the scanning unit to move to the sub-display area corresponding to the first control signal in a preset direction according to the first control signal of the control circuit board by the second displacement unit comprises the steps of:

[0071] S15: The first direction control module of the second displacement unit drives the scanning unit to move in a first direction according to the first control signal of the control circuit board.

[0072] S16: The second direction control module of the second displacement unit drives the scanning unit to move in a second direction according to the first control signal of the control circuit board.

[0073] Second embodiment:

[0074] Figure 11 The structure diagram of the scanning unit and the display unit of the second embodiment of the application is shown in the figure, Figure 11 As the second embodiment of the application, the embodiment is different from the first embodiment in that the interval between every two adjacent pixel electrodes 117 in the pixel electrode layer 112 is different, the interval between the first pixel electrode 117 and the second pixel electrode 117 is smaller than the interval between the second pixel electrode 117 and the third pixel electrode 117, so that after the driving electric field is formed between the pixel electrode 117 and the common electrode layer 220 according to the display requirement, a display picture with different resolutions can be formed. Of course, it is also possible to realize a specific display image by adjusting the position of the pixel electrode 117.

[0075] It should be noted that the limitations of the steps involved in the present scheme do not limit the order of the steps without affecting the implementation of the specific scheme. The steps written in the front can be executed first, or can be executed later, or even can be executed simultaneously. As long as the scheme can be implemented, it should be considered to belong to the protection scope of the present application.

[0076] It should be noted that the inventive concept of the present application can form a very large number of embodiments, but the length of the application file is limited and cannot list them one by one, so the above described embodiments or technical features can be combined to form new embodiments without conflict, and the combination of each embodiment or technical feature will enhance the original technical effect.

[0077] The above is a further detailed description of the present application in combination with specific optional embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as belonging to the protection scope of the present application.

Claims

1. An electronic paper display device, characterized in that, The device includes a driving component and a display unit. The driving component is disposed on a side of the display surface away from the display unit. The driving component includes a scanning unit, which includes a substrate, a pixel electrode layer disposed on the substrate, and a thin-film transistor connected to the pixel electrode layer. in When a preset distance is formed between the scanning unit and the display unit, a driving electric field is formed between the scanning unit and the display unit, and the display unit displays an image; The driving assembly further includes a displacement control unit, which is disposed on the display surface away from the display unit. The displacement control unit is at least connected to the scanning unit and is used to drive the scanning unit to move. At least one first detection electrode is provided on the scanning unit, and a second detection electrode is provided on the display unit corresponding to the first detection electrode. The orthographic projection of the second detection electrode on the scanning unit completely covers the orthographic projection of the first detection electrode on the scanning unit. When the second detection electrode is aligned with the first detection electrode, the capacitance can be automatically measured to obtain the dielectric condition within a preset distance, so as to finely adjust the voltage of the pixel electrode layer in real time.

2. The electronic paper display device as described in claim 1, characterized in that, The size of the scanning unit is smaller than the size of the display area of ​​the display unit; Wherein, let the size of the scanning unit be H, the size of the display area of ​​the display unit be N, and the positioning overlap area between the scanning unit and the display area be C, where H = 1 / N + C, and the result of N + C is a natural number greater than or equal to 2.

3. The electronic paper display device as described in claim 1, characterized in that, The driving assembly also includes a control circuit board, which is connected to the scanning unit and the displacement control unit respectively; the display unit includes multiple display areas. The displacement control unit moves the scanning unit to the display area represented by the control signal according to the control signal of the control circuit board and attaches it to the display area. The scanning unit drives the thin film transistor and the pixel electrode layer to apply a driving electric field to the display unit according to the driving signal of the control circuit board to form an image.

4. The electronic paper display device as described in claim 3, characterized in that, The displacement control unit includes a first direction control module and a second direction control module. The control circuit board is electrically connected to the first direction control module and the second direction control module respectively. The first direction control module receives a first direction control signal from the control circuit board to drive the scanning unit to move along the first direction. The second direction control module receives a second direction control signal from the control circuit board to drive the scanning unit to move along the second direction.

5. The electronic paper display device as described in claim 4, characterized in that, The displacement control unit includes a first displacement control unit and a second displacement control unit. The first displacement control unit is connected to the display unit, and the second displacement control unit is connected to the scanning unit. A first direction control module and a second direction control module are disposed on the second displacement control unit. The first displacement control unit includes a drive motor, a first connecting roller, a second connecting roller, and a connecting belt. The first connecting roller and the second connecting roller are disposed opposite to each other. The connecting belt is wound around the first connecting roller and the second connecting roller respectively. The display unit is fixedly connected to the connecting belt. The drive motor is electrically connected to the control circuit board. The second displacement control unit includes a first motor, a second motor, a third motor, a first moving rod, a second moving rod, a first driving rod, and a second driving rod. The first moving rod and the second moving rod are arranged side by side. The first motor is connected to the first moving rod, and the second motor is electrically connected to the second moving rod. The first driving rod is perpendicular to both the first and second moving rods, and its two ends are movably connected to both the first and second moving rods. The second driving rod and the third motor are respectively mounted on the first driving rod, and the third motor is electrically connected to the second driving rod. The display unit is connected to both the first and second driving rods. The first direction control module is electrically connected to the third motor, and the second direction control module is electrically connected to both the first and second motors.

6. The electronic paper display device as claimed in claim 1, characterized in that, The scanning unit further includes a protective layer disposed on the side of the pixel electrode layer away from the substrate; the pixel electrode layer includes a plurality of pixel electrodes arranged in an array, with equal spacing between adjacent pixel electrodes; The substrate is made of glass, and the protective layer is made of high-strength material. The display unit includes a substrate and a common electrode layer, an electronic ink layer, and a protective film layer stacked sequentially on the substrate; the protective film layer is disposed opposite to the protective layer, the substrate is made of a flexible transparent material, and the protective film layer is made of polyimide or Teflon material.

7. The electronic paper display device as claimed in claim 6, characterized in that, The scanning unit is detachable, and the scanning unit includes a first scanning head and a second scanning head arranged in parallel. The area of ​​the pixel electrode layer of the first scanning head is larger than the area of ​​the pixel electrode layer of the second scanning head; or The size of the first scanning head is larger than the size of the second scanning head.

8. A driving method for an electronic paper display device as described in any one of claims 1-7, characterized in that, Including the following steps: According to the preset control rules, the driving component drives the scanning unit and the display unit to form a preset distance between the display area to be displayed. When a driving electric field is formed between the scanning unit and the display unit, the display area displays the image.

9. The driving method as described in claim 8, characterized in that, Before the step of driving the scanning unit and the display area to be displayed by the display unit to form a preset distance according to the preset control rules, and before the display area displays an image when a driving electric field is formed between the scanning unit and the display unit, the method further includes the following step: The display area of ​​the display unit is divided into multiple sub-display areas, and the multiple sub-display areas are numbered. Numbering control rules are generated according to a preset order based on the numbering of the sub-display areas; The control circuit board generates multiple control signals according to the numbering control rules in a preset order; The step of driving the scanning unit and the display unit to form a preset distance according to preset control rules, and displaying an image in the display area when a driving electric field is formed between the scanning unit and the display unit, includes: The first displacement unit drives the display unit to move the sub-display area corresponding to the first control signal to a preset position according to the first control signal of the control circuit board; The second displacement unit drives the scanning unit to move to the sub-display area corresponding to the first control signal according to the first control signal and sticks to it. A driving electric field is formed between the scanning unit and the sub-display area corresponding to the first control signal, and the sub-display area corresponding to the first control signal displays an image. Repeat the above steps until all the sub-display areas display the image.

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