Electronic paper display device and driving method

Abstract

The invention discloses an electronic paper display device and a driving method, and relates to the technical field of electronic paper display, the electronic paper display device comprises a driving assembly and a display unit, the driving assembly is arranged on one side far away from a display surface of the display unit, and 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; 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; through the design, the cost is low, and the product yield is high.

Description

Technical Field

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

[0002] The electronic paper display (EPD) technology industry currently generally uses an electrophoretic layer and a TFT (Thin Film Transistor) driving electrode matrix layer to form an electronic paper display device. When changing frames, the TFT electrodes attached to the bottom layer control the vertical movement of the charged particles in the electrophoretic layer to produce a grayscale effect.

[0003] The biggest feature of electronic paper display devices is that they are bistable. They only need to be driven when switching images, and the image can be maintained for a long time without being charged. The resolution of electronic paper depends on the resolution of the driving electrode matrix, and the electrophoretic layer does not need to be specially assembled with the electrode.

[0004] However, in existing electronic paper display devices, the TFT substrate requires a high-cost photolithography process, which is costly and has a low yield. Especially when preparing large-area TFT substrates, a single particle may ruin the entire panel, significantly reducing the yield. Summary of the invention

[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 component and a display unit, wherein the driving component is arranged on a side away from a display surface of the display unit, and the driving component comprises a scanning unit, wherein 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 component further includes a displacement control unit, which is disposed on a side away from the display surface of the display unit, and the displacement control unit is at least connected to the scanning unit to drive 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, let the size of the scanning unit be H, let the size of the display area of ​​the display unit be N, let the positioning overlapping area between the scanning unit and the display area be C, wherein H=1 / N+C, wherein the result of N+C is a natural number greater than or equal to 2.

[0009] Optionally, the driving component also includes a control circuit board, which is respectively connected to the scanning unit and the displacement control unit; 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 adheres to it, and 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 a picture.

[0010] Optionally, the displacement control unit includes a first direction control module and a second direction control module, the control circuit board is respectively telecommunication-connected to the first direction control module and the second direction control module, the first direction control module and the second direction control module are respectively telecommunication-connected to the scanning unit, the first direction control module receives a first direction control signal from the control circuit board to drive the scanning unit to move in a first direction, and the second direction control module receives a second direction control signal from the control circuit board to drive the scanning unit to move in a second direction.

[0011] Optionally, 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; the first direction control module and the second direction control module are arranged on the second displacement control unit, the first displacement control unit includes a driving motor, a first connecting roller, a second connecting roller and a connecting belt, the first connecting roller and the second connecting roller are arranged opposite to each other, the connecting belt is respectively wound around the first connecting roller and the second connecting roller, and the display unit is fixedly connected to the connecting belt; the driving 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 in parallel, the first motor is connected to the first moving rod, the second motor is electrically connected to the second moving rod, the first driving rod The first moving rod and the second moving rod are respectively arranged vertically, and the two ends of the first driving rod are respectively movably connected with the first moving rod and the second moving rod, the second driving rod and the third motor are respectively arranged on the first driving rod, 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, and the connecting belt drives the display unit to move the display area represented by the first control signal to the position corresponding to the scanning unit, and the first motor, the second motor, and the third motor move the scanning unit and make it close 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 also includes a protective layer, which is arranged on a side of the pixel electrode layer away from the substrate; the pixel electrode layer includes a plurality of pixel electrodes arranged in an array, and 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 includes a substrate and a common electrode layer, an electronic ink layer and a protective film layer stacked in sequence on the substrate; the protective film layer is arranged 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.

[0013] Optionally, 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.

[0014] The present application also discloses a driving method for the electronic paper display device as described above, comprising the steps of:

[0015] According to the preset control rules, the driving component drives the scanning unit to be close to the display area that needs to be displayed by the display unit, 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 to be displayed according to a preset control rule, forming a driving electric field between the scanning unit and the display unit, and causing the display area to display an image, the step further includes:

[0017] Dividing a display area of ​​the display unit into a plurality of sub-display areas, and numbering the plurality of sub-display areas;

[0018] Generate a preset control rule according to the number of the sub-display area;

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

[0020] The step of driving the scanning unit to be close to the display area of ​​the display unit to be displayed according to the preset control rule, forming a driving electric field between the scanning unit and the display unit, and displaying an image in the display area includes:

[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 the sub-display area corresponding to the first control signal according to the first control signal of the control circuit board and to be close to the sub-display area, so that 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 with the prior art solution of combining an electronic paper display device by stacking an electrophoretic layer and a TFT driving electrode matrix layer on an upper and lower layer, the electronic paper display device of the present application includes a driving component and a display unit, wherein the driving component is arranged on a side of a display surface away from the display unit, and the driving component includes a scanning unit, which includes a substrate, a pixel electrode layer arranged on the substrate, and a thin film transistor connected to the pixel electrode layer; wherein, when the scanning unit is close to 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 prepared independently, so that only the scanning unit in the driving component needs to be prepared by a photolithography process, thereby reducing the risk of scrapping the display unit during the preparation process, while reducing costs and improving product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] Figure 1 is a schematic diagram of the structure of the electronic paper display device provided by the present application;

[0027] Figure 2 yes Figure 3 A schematic diagram of the local enlarged structure of the middle A area;

[0028] Figure 3 yes Figure 2 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 of the scanning unit moving along the Y direction;

[0030] Figure 5 It is a schematic diagram of the structure of the cooperation between two scanning units and a display unit provided in the first embodiment of the present application;

[0031] Figure 6 A schematic diagram of the steps of the driving method provided in this application;

[0032] Figure 7 yes Figure 6 Schematic diagram of the steps before step S1;

[0033] Figure 8 yes Figure 6 A schematic flow chart of further steps of step S1;

[0034] Fig. 9 yes Figure 8 Schematic diagram of the steps before step S12;

[0035] Fig.10 yes Fig. 9 A schematic diagram of a further step flow chart of step S14;

[0036] Fig.11 It is a schematic structural diagram of a scanning unit and a display unit according to the second embodiment of the present application.

[0037] Among them, 10, electronic paper display device; 100, driving component; 110, scanning unit; 111, substrate; 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, a third motor; 130, a first moving rod; 131, a second moving rod; 132, a first driving rod; 133, a second driving rod; 134, a first direction control module; 135, a second direction control module; 140, a control circuit board; 200, a display unit; 210, a substrate; 220, a common electrode layer; 230, an electronic ink layer; 240, a protective film layer; 250, a color resist layer; 300, a fixing member; 310, a first fixing member; 320, a second fixing member; 400, a first detection electrode; 410, a second detection electrode. DETAILED DESCRIPTION

[0038] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

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

[0040] Figure 1 is a schematic diagram of the structure of the electronic paper display device provided by the present application, Figure 2 yes Figure 3 A schematic diagram of the local enlarged structure of the A area in the middle. Figure 3 yes Figure 2 Schematic diagram of the film structure of the scanning unit and the display unit. Figure 4 yes Figure 2 The schematic diagram of the structure of the scanning unit moving along the Y direction is as follows Figure 1-Figure 4 As shown, the present application discloses an electronic paper display device 10, including a driving component 100 and a display unit 200, wherein the driving component 100 is arranged on a side of a display surface away from the display unit 200, and the driving component 100 includes a scanning unit 110, and the scanning unit 110 includes 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 solution of combining an electronic paper display device 10 by stacking an electrophoretic layer and a TFT driving electrode matrix layer on an upper and lower layer, the driving component 100 of the electronic paper display device 10 of the present application is arranged on a side of the display surface away from the display unit 200, and the driving component 100 includes a scanning unit 110, and the scanning unit 110 includes 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; that is, the display unit 200 and the driving component 100 are independently prepared, so that only the scanning unit 110 in the driving component 100 needs to be prepared by a photolithography process, thereby reducing the risk of scrapping the display unit 200 during the preparation process, while reducing costs and improving product yield.

[0042] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0043] First embodiment:

[0044] Among them, Figure 2 As shown, the pixel electrode layer 112 includes a plurality of pixel electrodes 117 arranged in an array, and the spacing 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 also includes a protective layer 114, which is 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, anti-scratch coating material, etc., for protecting the surface of the scanning unit 110 in contact with the display unit 200; the display unit 200 includes a substrate 210 and a common electrode layer 220, an electronic ink layer 230 and a protective film layer 240 sequentially stacked 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] like Figure 3 As shown, the display unit 200 may also be provided with a color resist layer 250, and the color resist layer 250 is provided between the electronic black water layer and the protective film layer 240, wherein the color resist layer 250 may be a pixel group color resist layer 250, or a block-shaped pre-layout regional color resist layer 250, which is used to cooperate with the driving to display a color picture.

[0046] The preset distance may be 0.03 mm to 1 mm. Figure 1As shown, the driving component 100 also includes a displacement control unit 120, and the displacement control unit 120 is arranged on a side of the display surface away from the display unit 200. The displacement control unit 120 is connected to at least the scanning unit 110, and is used to drive the scanning unit 110 to move. In this way, the scanning unit 110 can be controlled to move to the area to be displayed according to the area to be displayed by the display unit 200. After reaching a preset distance with the area to be displayed, the display area can be driven to display the picture, and the operation is flexible; of course, when the scanning unit 110 is driven to be close to the area to be displayed, that is, when the preset distance is 0, the voltage of the pixel electrode layer 112 is most stable and the display effect is best.

[0047] The size of the preset distance is equal to the thickness of the protective film layer 240. When the thickness of the protective film layer 240 is uneven or the protective film layer 240 is not provided, the preset distance between the scanning unit 110 and the display unit 200 can also form an electric field, but there may be a situation where the voltage of the pixel electrode layer 112 is unstable. At this time, at least one first detection electrode can be provided on the scanning unit 110, and a second detection electrode can be provided on the display unit 200 corresponding to the first detection electrode, wherein the positive projection of the second detection electrode on the scanning unit completely covers the positive projection of the first detection electrode on the scanning unit. In this way, after the second detection electrode is aligned with the first detection electrode, the capacitance can be automatically measured to obtain the dielectric condition within the preset spacing, and the voltage required to be given to the rubber electrode layer can be determined according to the dielectric condition, so as to fine-tune the voltage of the pixel electrode in real time to adapt to the uneven thickness or spacing of the protective film and achieve the purpose of uniform display. Of course, the first detection electrode can also be provided on the display unit, and the second detection electrode can be provided on the scanning unit.

[0048] Since the preparation process of the scanning unit 110 requires the preparation of the TFT circuit and the pixel electrode layer 112, the preparation process is relatively complicated. Therefore, the size of the scanning unit 110 can be made smaller than the size of the display area of ​​the display unit 200, so as to further reduce the preparation cost; let the size of the scanning unit 110 be H, let the size of the display area of ​​the display unit 200 be N, let the positioning overlap area of ​​the scanning unit 110 and the display area be C, where H=1 / N+C, where the result 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 a plurality of 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, so that the scanning unit 110 is driven to scan and drive the corresponding sub-display areas respectively until the entire display area of ​​the display unit 200 completes displaying the image. The more sub-display areas are set, the better. For example, the electronic paper display device 10 is applied to outdoor poster advertising space. When the outdoor poster advertising space updates the advertising image, it can be refreshed slowly, and it is also appropriate to change a picture every few minutes, or update it at night, so it does not need to be updated during the day, which improves efficiency. Of course, the size of the scanning unit 110 can also be the same as the display area of ​​the display unit 200, so that it only needs to be driven once to be close.

[0049] The above-mentioned positioning overlapping area can be the display area and the outer circle part of the scanning head where the pixel electrode layer 112 is not set, and the part that may overlap with the display screen; since the scanning unit 110 is made relatively small, the display screen of the display unit 200 needs to be completed by splicing the screen, and there will generally be an overlapping area of ​​the screen to avoid the appearance of splicing seams without screen.

[0050] Specifically, Figure 1As shown, the driving component 100 also includes a control circuit board 140, and the control circuit board 140 is connected to the scanning unit 110 and the displacement control unit 120 respectively; the display unit 200 may include 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 it according to the control signal of the control circuit board 140, and the scanning unit 110 drives the thin film transistor 113 and the pixel electrode layer 112 to apply the 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 the image picture, and then, the displacement control unit 120 moves the scanning unit 110 to the second display area and closely adheres to it according to the control signal of the control circuit board 140, so as to complete the image display of the second display area. Of course, when the display area of ​​the display unit 200 is three or more, it is sufficient to continue to drive the scanning unit 110 to move to the corresponding display area.

[0051] In addition, the displacement control unit 120 includes a first direction control module 134 and a second direction control module 135, the control circuit board 140 is respectively connected to the first direction control module 134 and the second direction control module 135, the first direction control module 134 and the second direction control module 135 are respectively connected to the scanning unit 110, the first direction control module 134 receives a first direction control signal from the control circuit board 140 to drive the scanning unit 110 to move in a first direction, and the second direction control module 135 receives a second direction control signal from the control circuit board 140 to drive the scanning unit 110 to move in a second direction. The first direction may be a horizontal movement in a direction close to or away from the display unit 200, and the second direction may be a horizontal movement in a direction parallel to the display unit 200, so that the movement direction of the scanning unit 110 can be adjusted accordingly by the first direction control module 134 and the second direction control module 135 to adjust the accuracy of the corresponding to the display area of ​​the display unit 200.

[0052] In order to further improve the accuracy of the correspondence between the scanning unit 110 and the display area of ​​the display unit 200, the display unit 200 can also 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 to the display unit 200, and the second displacement control unit 122 is connected to 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 and the second connecting roller 125 are arranged opposite to each other, the connecting belt 126 is respectively wound around the first connecting roller 124 and the second connecting roller 125, and the display unit 200 is fixedly connected to the connecting belt 126; the driving motor 123 is electrically connected to the control circuit board 140;

[0053] like Figure 1 As shown, 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 in parallel, the first motor 127 is connected to the first moving rod 130, the second motor 128 is electrically connected to the second moving rod 131, the first driving rod 132 is vertically arranged with the first moving rod 130 and the second moving rod 131 respectively, and the first driving rod 13 The two ends of the first moving rod 130 and the second moving rod 131 are movably connected respectively, the second driving rod 133 and the third motor 129 are respectively arranged on the first driving rod 132, the third motor 129 is electrically connected to the second driving rod 133, the display unit 200 is respectively connected to the first driving rod 132 and the second driving rod 133; the first direction control module 134 is electrically connected to the third motor 129, and the second direction control module 135 is electrically connected to the first motor 127 and the second motor 128;

[0054] The control circuit board 140 may include a first control signal and a second control signal, wherein the first control signal represents a driving signal for the first display area, and the second control signal represents a driving signal for 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 along 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 along the second direction and then closely contacts the display area represented by the first control signal. The first display area displays an image, and so on, so as to complete the driving of the second display area to display 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 can be easily replaced. Figure 5 is a schematic diagram of the structure of the cooperation between two scanning units and a display unit provided in the first embodiment of the present application, such as Figure 5As shown, for a display unit 200 with a relatively large area, in order to improve work efficiency, the scanning unit 110 includes a first scanning head 115 and a second scanning head 116 arranged in parallel, which can simultaneously drive the display image corresponding to the display area of ​​the display unit 200. 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 a larger image can be driven to display by the first scanning head 115, while the second scanning head 116 is driven to display a smaller image, so as to form a specific display image combination or a special-shaped image according to display needs. Of course, it is also possible to design the size of the first scanning head 115 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 to be larger than the area of ​​the pixel electrode layer 112 of the second scanning head 116, which is not limited here. Of course, when the sizes of the first scanning head 115 and the second scanning head 116 are consistent with the size of the pixel electrode layer 112, it is also possible to control and drive part of the pixel electrodes 117 of the first scanning head 115 or part of the electrodes of the second scanning head 116 to form a desired image display. Of course, according to the area of ​​the display unit 200, more than three scanning units 110 can also be provided.

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

[0057] Figure 6 The present application provides a step flow diagram of the driving method; Figure 6 As shown, the present application also discloses a driving method, using the electronic paper display device as described above, comprising the steps of:

[0058] S1: According to a preset control rule, the driving component drives the scanning unit to form a preset distance between the scanning unit and the display area to be displayed by the display unit, a driving electric field is formed between the scanning unit and the display unit, and the display unit displays an image.

[0059] Figure 7 yes Figure 6 The flow chart of the steps before step S1 is as follows: Figure 7 As shown, according to the preset control rule, the driving component drives the scanning unit to form a preset distance between the display area to be displayed by the display unit, and a driving electric field is formed between the scanning unit and the display unit, and before the step of displaying an image in the display area, the step further includes:

[0060] S2: dividing the display area of ​​the display unit into a plurality of sub-display areas, and numbering the plurality of sub-display areas;

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

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

[0063] Figure 8 yes Figure 6 The S1 step further steps flow chart is as follows Figure 8 As shown, according to the preset control rule, the driving component drives the scanning unit to be close to the display area that the display unit needs to display, and when a driving electric field is formed between the scanning unit and the display unit, the step of displaying an image in the display area includes:

[0064] S11: 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;

[0065] S12: 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 the sub-display area corresponding to the first control signal displays an image;

[0066] S13: The above steps are repeated until all the sub-display areas display images.

[0067] Of course, if it can also be driven according to a preset display area and driving logic, that is, according to a specific display area, for example, the display area is divided into four sub-display areas, the first numbered area is driven to display an image first, then the third numbered area is driven to display an image, then the second numbered area is driven to display an image, and finally the fourth numbered area is driven to display an image.

[0068] Fig. 9 yes Figure 8 The schematic diagram of the steps before step S12 in FIG. Fig. 9As shown, 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, and a driving electric field is formed between the scanning unit and the sub-display area corresponding to the first control signal. Before the sub-display area corresponding to the first control signal displays an image, the step of:

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

[0070] Fig.10 yes Fig. 9 A further step flow chart of step S14 is as follows: Fig.10 As shown, the second displacement unit drives the scanning unit to move in a preset direction to the sub-display area corresponding to the first control signal according to the first control signal of the control circuit board, including:

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

[0073] Second embodiment:

[0074] Fig.11 is a schematic diagram of the structure of the scanning unit and the display unit of the second embodiment of the present application. Fig.11 As shown, as the second embodiment of the present application, this embodiment is different from the first embodiment in that the spacing between each two adjacent pixel electrodes 117 in the pixel electrode layer 112 is different, and the spacing between the first pixel electrode 117 and the second pixel electrode 117 is smaller than the spacing 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 needs, a display screen with different resolutions can be formed. Of course, it is also possible to achieve a specific display image by adjusting the position of the pixel electrode 117.

[0075] It should be noted that the limitations on the various steps involved in this solution, without affecting the implementation of the specific solution, are not deemed to limit the order of the steps. The steps written in front can be executed first, or later, or even simultaneously. As long as this solution can be implemented, it should be deemed to fall within the scope of protection of this application.

[0076] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0077] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. An electronic paper display device, characterized in that: The device comprises a driving component and a display unit, wherein the driving component is arranged at a side away from a display surface of the display unit, the driving component comprises a scanning unit, and 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; 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.

2. The electronic paper display device according to claim 1, characterized in that: The driving assembly further includes a displacement control unit, which is disposed on a side away from the display surface of 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.

3. The electronic paper display device according to claim 2, characterized in that: The size of the scanning unit is smaller than the size of the display area of ​​the display unit; Among them, let the size of the scanning unit be H, let the size of the display area of ​​the display unit be N, let the positioning overlapping area of ​​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.

4. The electronic paper display device according to claim 2, wherein: The driving component further includes a control circuit board, and the control circuit board is connected to the scanning unit and the displacement control unit respectively; the display unit includes a plurality of display areas; The displacement control unit moves the scanning unit to the display area represented by the control signal and adheres to it according to the control signal of the control circuit board. 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 a picture.

5. The electronic paper display device according to claim 4, characterized in that: The displacement control unit includes a first direction control module and a second direction control module. The control circuit board is respectively connected to the first direction control module and the second direction control module by telecommunications. The first direction control module receives a first direction control signal from the control circuit board to drive the scanning unit to move in a 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 in a second direction.

6. The electronic paper display device according to claim 5, characterized in that: The displacement control unit comprises 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; 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 and the second connecting roller are arranged opposite to each other, the connecting belt is respectively wound around the first connecting roller and the second connecting roller, and the display unit is fixedly connected to the connecting belt; the driving 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 in parallel, the first motor is connected to the first moving rod, the second motor is electrically connected to the second moving rod, the first driving rod is vertically arranged with 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 respectively arranged on the first driving rod, the third motor is electrically connected to the second driving rod, and the display unit is connected to the first driving rod and the second driving rod respectively; the first direction control module is electrically connected to the third motor, and the second direction control module is electrically connected to the first motor and the second motor respectively.

7. The electronic paper display device according to claim 1, characterized in that: The scanning unit further comprises a protective layer, which is arranged on a side of the pixel electrode layer away from the substrate; the pixel electrode layer comprises a plurality of pixel electrodes arranged in an array, and 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 sequentially stacked on the substrate; the protective film layer is arranged 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.

8. The electronic paper display device according to claim 7, characterized in that: The scanning unit is detachable, and comprises 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 that of the second scanning head.

9. A driving method for the electronic paper display device according to any one of claims 1 to 8, characterized in that: Includes steps: According to a preset control rule, the driving component drives the scanning unit to form a preset distance with the display area that the display unit needs to display. When a driving electric field is formed between the scanning unit and the display unit, the display area displays an image.

10. The driving method according to claim 11, characterized in that: According to the preset control rule, the driving component drives the scanning unit to form a preset distance with the display area to be displayed by the display unit, and when a driving electric field is formed between the scanning unit and the display unit, before the step of displaying an image in the display area, the step further includes: Dividing the display area of ​​the display unit into a plurality of sub-display areas, and numbering the plurality of sub-display areas; Generating a numbering control rule in a preset order according to the numbering of the sub-display area; The control circuit board generates a plurality of control signals according to the numbering control rules in a preset order; 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 rule, and when a driving electric field is formed between the scanning unit and the display unit, the display area displays an image, 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 of the control circuit board and to be close to the sub-display area, so that 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; The above steps are repeated until all the sub-display areas display images.

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