Electronic paper printing equipment and electronic paper display panel

Abstract

The invention provides electronic paper printing equipment and an electronic paper display panel. The electronic paper printing equipment comprises a body structural part, a first control circuit arranged in the body structural part and a rolling printing structure arranged on the body structural part. The rolling printing structure comprises a rolling shaft fixed to the body structural part, and an electric connector, a first substrate layer and a thin film transistor layer which are arranged on the rolling shaft in a sleeving mode and stacked from inside to outside. The electronic paper display panel comprises a first substrate layer, a first common electrode layer and an electronic ink layer; a thin film transistor is not formed on the first common electrode layer, and the first control circuit is electrically connected with the thin film transistor layer through an electric connector and used for controlling a driving electric field between the thin film transistor layer and the first common electrode layer according to a picture to be printed so as to control the positions of ink particles of the electronic ink layer. And enabling the electronic paper display panel to display the picture to be printed. According to the technical scheme, the production cost can be reduced.

Description

Technical Field

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

[0002] Electronic paper based on bistable display technology has the advantages of low power consumption, no need for backlight, large viewing angle and high contrast. It has been widely used in products such as electronic labels, bus timetables, electronic bulletin boards, mobile phone screens, e-book readers and wearable electronic devices.

[0003] In the preparation process of related electronic paper display devices, it is usually necessary to use semiconductor processes (coating, exposure, development, etching, etc.) to prepare thin film transistors on the entire surface of the array substrate of the display panel. This design method of preparing thin film transistors on the entire surface of the array substrate will result in higher production costs as the size of the display panel increases. Summary of the invention

[0004] In view of this, the present application provides an electronic paper printing device and an electronic paper display panel for reducing production costs.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, an embodiment of the present application provides an electronic paper printing device, comprising: a main body structure, a first control circuit arranged in the main body structure, and a rolling printing structure arranged on the main body structure;

[0006] The rolling printing structure comprises a roller fixed on the main structure, and an electrical connector, a first substrate layer and a thin film transistor layer which are sleeved on the roller and stacked from inside to outside;

[0007] The first control circuit is electrically connected to the thin film transistor layer through the electrical connector, and is used to control the driving electric field between the thin film transistor layer and the first common electrode layer of the electronic paper display panel according to the picture to be printed, so as to control the position of ink particles in the electronic ink layer of the electronic paper display panel, so that the electronic paper display panel displays the picture to be printed.

[0008] In a possible implementation manner of the first aspect, a position detection structure electrically connected to the first control circuit is further provided on the main body structure, and the position detection structure is used to detect position movement information of the rolling printing structure on the display surface of the electronic paper display panel;

[0009] The first control circuit is specifically used to: output a first drive signal to the thin film transistor layer according to the position movement information and the picture to be printed, and the first drive signal is specifically used to control the driving electric field between the thin film transistor layer at the target position and the first common electrode layer to control the position of ink particles in the electronic ink layer of the electronic paper display panel, so that the electronic paper display panel displays the picture to be printed at the target position.

[0010] In a possible implementation manner of the first aspect, a rolling protection layer is disposed on the periphery of the thin film transistor layer.

[0011] In a possible implementation manner of the first aspect, the main body structure is provided with a handle, a function button and / or a contact, the function button is electrically connected to the first control circuit, and the first control circuit is further used to execute a corresponding control function according to a trigger signal of the function button;

[0012] The function keys include at least one of the following: an on / off key, an erase key, a first reset key, and one or more shortcut keys, wherein the shortcut keys are used to trigger the first control circuit to output a drive signal corresponding to a target printing screen to the thin film transistor layer;

[0013] The first control circuit is further configured to: after receiving a first reset signal from a first reset key, output a first reset drive signal to the electronic paper display panel through the contact, so as to instruct the electronic paper display panel to display a solid color picture according to the first reset drive signal;

[0014] The main body structure is also provided with a display screen, and the first control circuit is electrically connected to the display screen for controlling the display screen to display the picture to be printed.

[0015] In a possible implementation manner of the first aspect, the first control circuit includes a processing unit, a storage unit electrically connected to the processing unit, a wireless communication unit, and a logic drive unit;

[0016] The wireless communication unit is used to receive the picture to be printed;

[0017] The logic driving unit is used to output the first driving signal to the thin film transistor layer.

[0018] In a second aspect, an embodiment of the present application provides an electronic paper display panel, comprising: a second substrate layer, a first common electrode layer and an electronic ink layer stacked along a first direction, wherein no thin film transistor is formed on the first common electrode layer, and the first common electrode layer and the thin film transistor layer of the electronic paper printing device can form a driving electric field under the driving action of the electronic paper printing device to control the position of ink particles in the electronic ink layer; the first direction is toward the display surface of the electronic paper display panel.

[0019] In a possible implementation manner of the second aspect, a protective film layer is provided on a side of the electronic ink layer away from the second substrate layer;

[0020] A positioning mark layer is arranged between the electronic ink layer and the protective film layer, and the positioning mark layer includes a base layer and a plurality of positioning marks arranged in an array on the base layer; the positioning marks are used to enable the electronic paper printing device to determine the position movement information of the rolling printing structure on the display surface.

[0021] In a possible implementation of the second aspect, the base layer is made of polyimide, the protective film layer is made of the same material as the base layer, and the positioning mark is evaporated on the base layer.

[0022] In a possible implementation manner of the first aspect, the electronic paper display panel further includes: a second control circuit, a second reset button, and a second common electrode layer disposed between the positioning mark layer and the electronic ink layer, wherein the second common electrode layer is a hollow structure;

[0023] The second control circuit is electrically connected to the second reset key and the second common electrode layer, respectively, and is used to output a second drive signal to the second common electrode layer after receiving a second reset signal from the second reset key, so as to control the drive electric field between the second common electrode layer and the first common electrode layer so that the electronic paper display panel displays a solid color picture.

[0024] In a possible implementation manner of the first aspect, the electronic paper display panel is further provided with a conductive contact electrically connected to the second control circuit, and the conductive contact is used to transmit a first reset drive signal output by the electronic paper printing device through a contact to the second control circuit;

[0025] The second control circuit is further configured to output the second driving signal to the second common electrode layer according to the first reset driving signal.

[0026] The electronic paper printing device and electronic paper display panel provided in the embodiment of the present application include: a main body structure, a first control circuit arranged in the main body structure, and a rolling printing structure arranged on the main body structure; the rolling printing structure includes a roller fixed on the main body structure, and an electrical connector, a first substrate layer, and a thin film transistor layer sleeved on the roller and stacked from the inside to the outside; the electronic paper display panel includes a first substrate layer, a first common electrode layer, and an electronic ink layer; no thin film transistor is formed on the first common electrode layer, and the first control circuit is electrically connected to the thin film transistor layer through an electrical connector, and is used to control the electric field between the thin film transistor layer and the first common electrode layer according to the picture to be printed, so as to control the position of the ink particles of the electronic ink layer, so that the electronic paper display panel displays the picture to be printed. By setting the thin film transistor layer in the electronic paper printing device, the first common electrode layer in the electronic paper display panel does not need to prepare the thin film transistor on the whole surface, so that the preparation cost and defect rate of the thin film transistor prepared on the whole surface of the electronic paper display panel can be reduced, thereby reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a first electronic paper display device provided in an embodiment of the present application;

[0028] Figure 2 A top view of the electronic paper display device provided in an embodiment of the present application;

[0029] Figure 3 for Figure 2 A magnified schematic diagram of the middle A area;

[0030] Figure 4 A schematic diagram of the structure of a second electronic paper display device provided in an embodiment of the present application;

[0031] Figure 5 This is a schematic structural diagram of a third electronic paper display device provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1-electronic paper printing device; 11-body structure; 111-handle; 112-function key; 1121-on / off key; 1122-erase key; 1123-shortcut key; 113-display screen; 114-contact; 115-first reset key; 12-rolling printing structure; 121-roller; 122-electric connector; 123-first substrate layer; 124-thin film transistor layer; 1241-thin film transistor circuit layer; 1242-pixel electrode layer; 125-rolling protection layer; 13-first control circuit; 14-position detection structure;

[0034] 2-electronic paper display panel; 21-second substrate layer; 22-first common electrode layer; 23-electronic ink layer; 24-protective film layer; 25-positioning mark layer; 251-base layer; 252-marking layer; 2521-positioning mark; 26-second common electrode layer; 27-conductive contact. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application. The terms used in the implementation method section of the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0036] Electronic ink technology is an electronic paper display technology that does not emit light itself, relies on natural light reflection to form images, and maintains static images in a bistable state without the need for electricity. After the electric field is removed, the display image will continue to display and will not disappear. Electronic ink can be divided into microcapsule structure or microcup structure according to the electrophoresis type.

[0037] The embodiment of the present application provides an electronic paper printing device and an electronic paper display panel, which are used to reduce production costs. For ease of description, the electronic paper printing device and the electronic paper display panel are collectively referred to as an electronic paper display device below.

[0038] Figure 1 A schematic diagram of the structure of a first electronic paper display device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the electronic paper display device may include an electronic paper printing device 1 and an electronic paper display panel 2. The electronic paper printing device 1 may include a body structure 11, a rolling printing structure 12 disposed on the body structure 11, and a first control circuit 13 disposed in the body structure 11. The electronic paper display panel 2 may include a second substrate layer 21, a first common electrode layer 22, and an electronic ink layer 23 stacked along a first direction. The contact surface of the rolling printing structure 12 with the display surface of the electronic paper display panel 2 during printing is the printing surface. Figure 1 The first direction may be from bottom to top, that is, the first direction is the direction from the printing surface to the display surface.

[0039] Specifically, in the electronic paper printing device 1, the material of the main body structure 11 can be plastic, so as to reduce the weight of the main body structure 11. Of course, the main body structure 11 can also be made of other materials, which can be selected according to actual needs. The rolling printing structure 12 may include a roller 121 fixed on the main body structure 11, and an electrical connector 122, a first substrate layer 123 and a thin film transistor layer 124 that are stacked from the inside to the outside and sleeved on the roller 121. The electrical connector 122 may include components such as bearings, conductive rings or slip rings. When the rolling printing structure 12 is rolling printed on the display surface of the electronic paper display panel 2, the inner side wall of the electrical connector 122 can rotate synchronously with the roller 121, and the outer side wall can be relatively stationary with the first substrate layer 123, thereby improving the connectivity of the circuit, so that the rolling printing structure 12 can also maintain electrical connection with the first control circuit 13 during the rotation process.

[0040] The printing width of the rolling printing structure 12 can be set according to actual needs. The specific structure and principle of the electrical connector 122 can refer to the prior art, and the embodiments of the present application will not be repeated here. The first substrate layer 123 can be a hard substrate, such as a glass substrate, so that the cost can be reduced. The first substrate layer 123 can also be a flexible substrate to improve the flexibility of the rolling printing structure 12. The material can be polyimide (PI) or polyethylene terephthalate, etc., so that a certain degree of deformation can occur when it is pressed. In this way, when the surface flatness of the electronic paper display panel 2 is poor, printing can also be performed normally, thereby improving the practicality and applicability of the electronic paper printing device 1.

[0041] The thin film transistor layer 124 may include a thin film transistor circuit layer 1241 disposed on the periphery of the electrical connector 122 and a pixel electrode layer 1242 formed on the thin film transistor circuit layer 1241. The thin film transistor circuit layer 1241 may include a plurality of thin film transistors, the pixel electrode layer 1242 may include a plurality of pixel electrodes, and each thin film transistor may be electrically connected to a pixel electrode in the pixel electrode layer 1242 in a one-to-one correspondence, so as to apply a voltage to the pixel electrode. The material of the pixel electrode may be indium tin oxide, etc., which is not particularly limited in the embodiment of the present application.

[0042] In the electronic paper display panel 2, the material of the second substrate layer 21 can refer to the relevant description of the first substrate layer 123. When the material of the second substrate layer 21 is PI, it is convenient to fix the electronic paper display panel 2 on the surface of a curved or irregular object, realize the full fitting design of the electronic paper display panel 2 and the fixed surface, and expand the application range of the electronic paper display device.

[0043] The first common electrode layer 22 can be a metal sheet that does not need to be processed by a semiconductor process, so the surface has good flatness, which can not only reduce the production cost and difficulty, but also facilitate the formation of the electronic ink layer 23 above the first common electrode layer 22. By preparing the thin film transistor in the electronic paper printing device 1, the process area of ​​the semiconductor process in the electronic paper display panel 2 can be reduced, thereby improving the product yield and preparation cost. In addition, since the first common electrode layer 22 does not need to be set with complex circuit routing, the frame distance can be reduced, and the frameless design of the electronic paper display panel 2 can be realized.

[0044] In addition, compared to existing electronic paper display devices, when a fault occurs in the electronic paper printing device 1 and / or the electronic paper display panel 2 in the embodiment of the present application, for example, a fault occurs in the electronic paper display panel 2, only the electronic paper display panel 2 can be replaced, thereby reducing the maintenance cost of the electronic paper display device.

[0045] Since the first common electrode layer 22 can be disposed below the electronic ink layer 23, the material can also be made of opaque conductive metals such as copper, molybdenum, chromium, and nickel-chromium alloy to further reduce costs. The material of the first common electrode layer 22 can be selected according to actual needs, and the embodiment of the present application does not impose any particular limitation on this.

[0046] The electronic ink layer 23 can change the position of the ink particles (or electrophoretic particles) in the microcapsules or microcups under the action of the driving electric field, thereby realizing the display of images and texts. Taking the electronic ink layer 23 using a microcapsule structure as an example, the electronic ink layer 23 can include millions of microcapsules, each of which can contain negatively charged white electrophoretic particles and positively charged black electrophoretic particles, and suspended in a transparent liquid.

[0047] When the electronic ink layer 23 is acted upon by a driving electric field, according to the principle of positive and negative attraction, the electrophoretic particles can move upward or downward under the action of the electric field force, so that black or white can be displayed on the electronic paper display panel 2. For example, in the case of a positive electric field, the white electrophoretic particles are attracted to move upward, and the black electrophoretic particles are repelled to move downward, and the display screen shows white. Similarly, in the case of a negative electric field, the white electrophoretic particles are repelled to move downward, and the black electrophoretic particles are attracted to move upward, and the display screen shows black. Of course, the white electrophoretic particles can also be positively charged, and correspondingly, the black electrophoretic particles can be negatively charged. The electrophoretic particles can also include particles of other colors, such as red electrophoretic particles. The embodiments of the present application only take black and white as examples.

[0048] When the direction and intensity of the driving electric field change, the moving direction and moving speed of the electrophoretic particles may also change. In the embodiment of the present application, the electronic ink layer 23 may be a microcapsule structure or a microcup structure, and the embodiment of the present application does not impose any particular limitation on this.

[0049] For ease of description, the following is an example in which white electrophoretic particles are negatively charged, black electrophoretic particles are positively charged, and they display white in a positive electric field and display black in a negative electric field.

[0050] The first control circuit 13 may include a processing unit, a storage unit electrically connected to the processing unit, a wireless communication unit, and a logic drive unit. Among them, the wireless communication unit can be used to receive the picture to be printed. For example, the wireless communication unit can establish a wireless connection with the terminal device to receive the picture to be printed sent by the user through the terminal device; the storage unit can be used to store the picture to be printed. The processing unit can generate an electrical signal according to the picture to be printed, and the logic drive unit is used to output the first drive signal to the thin film transistor layer 124 according to the electrical signal. In some embodiments, the logic drive unit can also be integrated in the processing unit. The electronic paper printing device 1 can also be provided with a Universal Serial Bus (USB) power interface, and the USB power supply provides power to the electronic paper printing device 1 through the USB power interface.

[0051] The screen to be printed may be an image, text, table, etc., and the acquisition method may include but is not limited to receiving through a wireless communication unit, acquiring from a storage unit, and acquiring through an input module electrically connected to the first control circuit 13, so that the electronic paper printing device 1 can print the screen to be printed from a variety of sources on the electronic paper display panel 2. Among them, the input module may include a keyboard and / or a printer, etc., and the input module is electrically connected to the first control circuit 13 through an input and output port set on the electronic paper printing device 1. The keyboard can also be connected to the first control circuit 13 in a wireless or wired manner, so that the user can input the content to be printed.

[0052] In some embodiments, the electronic paper display panel 2 may not be connected to a power source to reduce power consumption. When a user uses the electronic paper printing device 1 for printing, the first control circuit 13 may output a first drive signal to the thin film transistor layer 124 according to the picture to be printed. The first drive signal may be an electric field array signal. When the rolling printing structure 12 contacts the display surface, the first drive signal may control the generation of a drive electric field between the pixel electrode layer 1242 and the first common electrode layer 22, so that a potential difference is generated between each pixel electrode and the first common electrode layer 22. The electrophoretic particles may undergo electrophoretic motion under the action of the drive electric field and display the picture to be printed on the electronic paper display panel 2. Therefore, the electronic paper display panel 2 may only apply a drive voltage to the pixel electrode layer 1242 without being powered on, and may also realize pixel-level control of the position of the ink particles, thereby realizing flexible printing of a local area of ​​the electronic paper display panel 2.

[0053] This solution can be applied to scenes such as advertising columns, wall advertising areas, teaching areas, and interior decoration to achieve flexible intelligent bistable display. For example, in interior decoration, users can fix the electronic paper display panel 2 on the wall of the living room, and then use the electronic paper printing device 1 to roll out wallpaper images of different styles or background decorations such as large-area maps to change the decoration style of the living room.

[0054] Considering that the rolling printing structure 12 will cause wear when rolling printing on the display surface, a protective film layer 24 may be attached to the side of the electronic ink layer 23 away from the second substrate layer 21, and a rolling protective layer 125 may be provided on the periphery of the thin film transistor layer 124, so that the wear of the electronic ink layer 23 and the thin film transistor layer 124 can be reduced, thereby improving the service life of the electronic paper display panel 2 and the electronic paper printing device 1. The material of the protective film layer 24 may be PI, and since PI is a highly insulating organic polymer material, the material of the rolling protective layer 125 may be the same as that of the protective film layer 24, so that when the user presses the electronic paper printing device 1 on the electronic paper display panel 2 for printing, the protective film layer 24 and the rolling protective layer 125 can buffer the pressing force, thereby reducing the damage to the electronic paper display panel 2 caused by the pressing force, and extending the service life of the electronic paper display panel 2.

[0055] In a possible implementation, a position detection structure 14 electrically connected to the first control circuit 13 may be further provided on the main structure 11, and the position detection structure 14 may be used to detect the position movement information of the rolling printing structure 12 on the display surface, and the effective detection width of the position detection structure 14 is D. The position movement information may include information such as the rolling speed, the rolling direction, and the rolling distance, and the position detection structure 14 may include a charge-coupled device (CCD) and an acceleration sensor.

[0056] For example, during rolling printing, the position detection structure 14 can obtain the position movement information, and the first control circuit 13 can output the first drive signal to the thin film transistor layer 124 according to the position movement information and the picture to be printed. The rolling speed can be proportional to the intensity of the driving electric field. For example, when the rolling speed is fast, the intensity of the driving electric field applied by the first drive signal between the thin film transistor layer 124 and the first common electrode layer 22 also increases to speed up the movement speed of the ink particles, thereby avoiding the situation where the contact time between the rolling printing structure 12 and the display surface is reduced, resulting in printing errors. Among them, the corresponding relationship between the electric field intensity and the rolling speed can be pre-stored in the storage unit.

[0057] When the area of ​​the picture to be printed is large, the electronic paper printing device 1 can also divide the picture to be printed according to the width of the picture to be printed and the printing width of the rolling printing structure 12, so as to facilitate subsequent splicing into a complete picture to be printed.

[0058] Exemplarily, the first control circuit 13 can divide the screen to be printed into multiple sub-screens to be printed, and number each sub-screen to be printed. The number can be an Arabic number, and when printing each sub-screen to be printed, the number is also printed on the electronic paper display panel 2. The number of each sub-screen to be printed can be printed in multiples. In this way, when the electronic paper printing device 1 is rolling, for example, deliberately printing a crooked photo, the electronic paper printing device 1 can determine the sub-screen to be printed based on the position movement information and the number, so that the sub-screen to be printed can be spliced ​​and printed.

[0059] The position detection structure 14 can also generate a sub-image to be printed corresponding to the number of the currently printed image, so as to facilitate repeated printing. In some embodiments, the electronic paper printing device 1 can also print the image to be printed at a specific position (or target position) of the electronic paper display panel 2 according to the number of the sub-image to be printed, the area and position movement information of the sub-image to be printed, such as repeated printing at an unclear position, so as to improve the display quality of the electronic paper display device.

[0060] See also Figures 1 to 3In order to improve the accuracy of the position detection structure 14, a positioning mark layer 25 may be provided between the electronic ink layer 23 and the protective film layer 24. The positioning mark layer 25 may include a base layer 251 and a mark layer 252 formed on the base layer 251. The mark layer 252 includes a plurality of positioning marks 2521 arranged in an array. The position detection structure 14 may determine the position movement information of the rolling printing structure 12 on the display surface according to the positioning marks 2521. The distance between adjacent positioning marks 2521 is L, and L is less than the effective detection width D of the position detection structure 14, so that the position detection structure 14 generates the position movement information according to the positioning marks 2521, thereby improving the accuracy of the position movement information generated by the position detection structure 14.

[0061] The material of the base layer 251 can be the same as that of the protective film layer 24, for example, the material of the base layer 251 can also be PI, thereby reducing the difficulty of preparation. The positioning mark 2521 can be metal and formed on the base layer 251 by evaporation. The shape can be "+", "T" or dot, etc. Figure 3 Take “+” as an example.

[0062] In some embodiments, the positioning mark 2521 may also be a number, so as to further improve the accuracy of the position detection structure 14. The positioning mark 2521 is exemplified below as a number.

[0063] The distance between adjacent positioning marks 2521 is known, and the position detection structure 14 can determine the moving distance of the rolling printing structure 12 according to the positioning marks 2521, so as to perform rolling or repeated printing according to the moving distance. The position detection structure 14 can also confirm whether the printing position is in the effective display area, whether the printing direction is horizontal and / or vertical, and whether printing has been completed according to the positioning marks 2521.

[0064] In addition, when performing splicing printing, for example, when the position detection structure 14 determines that the current area to be printed covers the printed area (it is detected that the positioning mark 2521 of the first printed area is greater than one column), that is, the printing area overlaps, the first control circuit 13 can prevent the generation of an electric potential difference between the pixel electrode layer 1242 corresponding to the repeated area and the first common electrode layer 22, and start splicing the screen to be printed in the non-repeated area. This can maintain the integrity of the printed screen while allowing the screen to be printed to be completely printed on the display panel, thereby improving the reliability of the electronic paper display device.

[0065] In a possible display mode, the position detection structure 14 can also further improve the positioning accuracy of the position detection structure 14 according to the positioning mark 2521 of the mark layer 252 and the number of the sub-image to be printed.

[0066] See also Figure 3 The main body structure 11 may be provided with a handle 111, a function key 112 and a display screen 113 to improve the convenience of using the electronic paper printing device 1. The handle 111 may be formed integrally with the main body structure 11, thereby simplifying the structure. The handle 111 may also be provided with a metal member (not shown) electrically connected to the first control circuit 13, and the metal member may be exposed on the handle 111 to serve as a grounding point of the electronic paper printing device 1.

[0067] The function button 112 may be electrically connected to the first control circuit 13, and the first control circuit 13 may also be used to execute a corresponding control function according to a trigger signal of the function button 112. Figure 3 , the function key 112 may include at least one of the following: a power key 1121, an erase key 1122, and one or more shortcut keys 1123. The user can control the working state of the electronic paper printing device 1 through the power key 1121. The erase key 1122 can be used to erase the content displayed on the electronic paper display panel 2. For example, after the user presses the erase key 1122, the first control circuit 13 can control the driving electric field applied between the pixel electrode layer 1242 and the first common electrode layer 22, for example, applying a positive electric field to change the position of the ink particles, so that the printed area displays a pure color picture of a white picture, and the original display content is erased. In some embodiments, the user can also customize the erase key 1122 so that it can only erase lines, or only erase colors, single color blocks, etc.

[0068] The shortcut key 1123 can be used to trigger the first control circuit 13 to output a drive signal corresponding to a target printing screen to the thin film transistor layer 124. The target printing screen can be horizontal lines, vertical lines, and common graphics, etc. The display screen 113 can be electrically connected to the first control circuit 13 to display the screen to be printed.

[0069] Figure 4 A schematic diagram of the structure of a second electronic paper display device provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the electronic paper display panel 2 may further include a second control circuit, a second reset button (not shown), and a second common electrode layer 26 disposed between the positioning mark layer 25 and the electronic ink layer 23. The second common electrode layer 26 may be a hollow structure, that is, a plurality of array-arranged opening areas are provided on the second common electrode layer 26. The second control circuit may be electrically connected to the second reset button and the second common electrode layer 26, respectively, and after receiving the second reset signal of the second reset button, the second drive signal may be output to the second common electrode layer 26, so that a drive electric field is generated between the first common electrode layer 22 and the second common electrode layer 26, so as to achieve the technical effect that the electronic paper display panel 2 displays a pure color picture (i.e., erases the display picture).

[0070] In addition, since the second common electrode layer 26 has multiple opening areas, the electronic paper printing device 1 can still generate a driving electric field between the thin film transistor layer 124 and the first common electrode layer 22, such as applying a positive electric field to make the white ink particles in the printing area move upward and the black ink particles move downward, so that the picture can be displayed normally.

[0071] For further information, see Figure 5 , the electronic paper display panel 2 may also be provided with a conductive contact 27 electrically connected to the second control circuit, and correspondingly, the main body structure 11 may also be provided with a contact 114 and a first reset key 115 electrically connected to the first control circuit 13. The first control circuit 13 may provide power to the second control circuit through the contact 114 and the conductive contact 27, when the contact 114 and the conductive contact 27 are in contact. The first control circuit 13 may also output a first reset drive signal to the second control circuit through the contact 114 and the conductive contact 27 after receiving the first reset signal of the first reset key 115, and the first reset drive signal is used to instruct the second control circuit to output a second drive signal to the second common electrode layer 26 to control the electric field applied between the second common electrode layer 26 and the first common electrode layer 22, so that the electronic paper display panel 2 displays a pure color picture. In some embodiments, the first reset signal and the first reset drive signal may be the same signal.

[0072] The electronic paper printing device and electronic paper display panel provided in the embodiment of the present application include: a main body structure, a first control circuit arranged in the main body structure, and a rolling printing structure arranged on the main body structure; the rolling printing structure includes a roller fixed on the main body structure, and an electrical connector, a first substrate layer and a thin film transistor layer arranged on the roller from the inside to the outside; the electronic paper display panel includes a first substrate layer, a first common electrode layer and an electronic ink layer; no thin film transistor is formed on the first common electrode layer, and the first control circuit is electrically connected to the thin film transistor layer through an electrical connector, and is used to control the electric field between the thin film transistor layer and the first common electrode layer according to the picture to be printed, so as to control the position of the ink particles of the electronic ink layer, so that the electronic paper display panel displays the picture to be printed. The technical solution provided in the present application can reduce the production cost. In the embodiment of the present application, the thin film transistor layer is arranged in the electronic paper printing device, so that the first common electrode layer in the electronic paper display panel does not need to prepare the thin film transistor on the whole surface, which can reduce the preparation cost and defect rate of the thin film transistor on the whole surface of the electronic paper display panel, thereby reducing the production cost.

[0073] It should be understood that in the description of the present application specification and the appended claims, the terms "include", "comprises", "has" and any variations thereof are intended to cover non-exclusive inclusions and mean "including but not limited to", unless otherwise specifically emphasized.

[0074] In the description of this application, unless otherwise specified, " / " indicates that the objects associated with each other are in an "or" relationship. For example, A / B can represent A or B. "And / or" in this application is used to describe the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0075] Furthermore, in the description of the present application, unless otherwise specified, "plurality" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items.

[0076] In addition, in the description of the present application, it should be understood that the terms "longitudinal", "horizontal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0077] In the present application, unless otherwise clearly specified and limited, the terms "connection", "connected", etc. should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in this application according to the specific circumstances.

[0078] In addition, in the description of the present specification and the appended claims, the terms "first", "second", etc. are used to distinguish similar objects, but not necessarily to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein; the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0079] In the embodiments of the present application, the words "exemplarily" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0080] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic paper printing device, characterized in that: include: A main body structure, a first control circuit disposed in the main body structure, and a rolling printing structure disposed on the main body structure; The rolling printing structure comprises a roller fixed on the main structure, and an electrical connector, a first substrate layer and a thin film transistor layer which are sleeved on the roller and stacked from inside to outside; The first control circuit is electrically connected to the thin film transistor layer through the electrical connector, and is used to control the driving electric field between the thin film transistor layer and the first common electrode layer of the electronic paper display panel according to the picture to be printed, so as to control the position of ink particles in the electronic ink layer of the electronic paper display panel, so that the electronic paper display panel displays the picture to be printed.

2. The electronic paper printing device according to claim 1, characterized in that: The main body structure is also provided with a position detection structure electrically connected to the first control circuit, and the position detection structure is used to detect the position movement information of the rolling printing structure on the display surface of the electronic paper display panel; The first control circuit is specifically used to: output a first drive signal to the thin film transistor layer according to the position movement information and the picture to be printed, and the first drive signal is specifically used to control the driving electric field between the thin film transistor layer and the first common electrode layer at the target position, so as to control the position of ink particles in the electronic ink layer of the electronic paper display panel, so that the electronic paper display panel displays the picture to be printed at the target position.

3. The electronic paper printing device according to claim 1, characterized in that: A rolling protection layer is arranged on the periphery of the thin film transistor layer.

4. The electronic paper printing device according to any one of claims 1 to 3, characterized in that: The main body structure is provided with a handle, a function button and / or a contact, the function button is electrically connected to the first control circuit, and the first control circuit is also used to execute a corresponding control function according to a trigger signal of the function button; The function keys include at least one of the following: an on / off key, an erase key, a first reset key, and one or more shortcut keys, wherein the shortcut keys are used to trigger the first control circuit to output a drive signal corresponding to a target printing screen to the thin film transistor layer; The first control circuit is further configured to: after receiving a first reset signal from a first reset key, output a first reset drive signal to the electronic paper display panel through the contact, so as to instruct the electronic paper display panel to display a solid color picture according to the first reset drive signal; The main body structure is also provided with a display screen, and the first control circuit is electrically connected to the display screen for controlling the display screen to display the picture to be printed.

5. The electronic paper printing device according to claim 2, characterized in that: The first control circuit includes a processing unit, a storage unit electrically connected to the processing unit, a wireless communication unit and a logic drive unit; The wireless communication unit is used to receive the picture to be printed; The logic driving unit is used to output the first driving signal to the thin film transistor layer.

6. An electronic paper display panel, characterized in that: include: A second substrate layer, a first common electrode layer and an electronic ink layer are stacked along a first direction, no thin film transistor is formed on the first common electrode layer, and the first common electrode layer and the thin film transistor layer of the electronic paper printing device can form a driving electric field under the driving action of the electronic paper printing device to control the position of ink particles in the electronic ink layer; the first direction is toward the display surface of the electronic paper display panel.

7. The electronic paper display panel according to claim 6, characterized in that: A protective film layer is provided on a side of the electronic ink layer away from the second substrate layer; A positioning mark layer is arranged between the electronic ink layer and the protective film layer, and the positioning mark layer includes a base layer and a plurality of positioning marks arranged in an array on the base layer; the positioning marks are used to enable the electronic paper printing device to determine the position movement information of the rolling printing structure of the electronic paper printing device on the display surface.

8. The electronic paper display panel according to claim 7, characterized in that: The base layer is made of polyimide, the protective film layer is made of the same material as the base layer, and the positioning mark is evaporated on the base layer.

9. The electronic paper display panel according to claim 7, characterized in that: The electronic paper display panel further includes: a second control circuit, a second reset button, and a second common electrode layer disposed between the positioning mark layer and the electronic ink layer, wherein the second common electrode layer is a hollow structure; The second control circuit is electrically connected to the second reset key and the second common electrode layer, respectively, and is used to output a second drive signal to the second common electrode layer after receiving a second reset signal from the second reset key, so as to control the drive electric field between the second common electrode layer and the first common electrode layer so that the electronic paper display panel displays a solid color picture.

10. The electronic paper display panel according to claim 9, characterized in that: The electronic paper display panel is further provided with a conductive contact electrically connected to the second control circuit, and the conductive contact is used to transmit a first reset driving signal output by the electronic paper printing device through a contact to the second control circuit; The second control circuit is further configured to output the second driving signal to the second common electrode layer according to the first reset driving signal.

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