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 and a printing structure, the body structural part is provided with a containing cavity, and the first control circuit and the printing structure are located in the containing cavity; the printing structure comprises a first substrate layer and a thin film transistor layer which are stacked in the first direction, and the thin film transistor layer is electrically connected with the first control circuit; the electronic paper display panel comprises a second substrate layer, a first common electrode layer and an electronic ink layer which are stacked in the second direction, and a thin film transistor is not formed on the first common electrode layer; the first control circuit is used for controlling an electric field between the thin film transistor layer and the first common electrode layer according to a to-be-printed picture so as to control the positions of ink particles of the electronic ink layer, so that the electronic paper display panel displays the to-be-printed picture. 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 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 to reduce production costs.

[0005] In order to achieve the above-mentioned object, in a first aspect, an embodiment of the present application provides an electronic paper printing device, the electronic paper printing device comprising: a main body structure, a first control circuit and a printing structure, the main body structure is provided with a receiving cavity, the first control circuit and the printing structure are located in the receiving cavity;

[0006] The printing structure comprises a first substrate layer and a thin film transistor layer stacked along a first direction, wherein the thin film transistor layer is electrically connected to the first control circuit; the first direction faces a printing surface of the electronic paper printing device, and the printing surface is used to contact a display surface of the electronic paper display panel;

[0007] The first control circuit 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, the thin film transistor layer includes a thin film transistor circuit layer and a pixel electrode layer stacked along a first direction, and the pixel electrode layer includes a plurality of pixel electrodes;

[0009] The first control circuit is specifically used to output a first driving signal to the thin film transistor layer according to the image to be printed, and the first driving signal is specifically used to control the driving electric field between each pixel electrode of the pixel electrode layer and the first common electrode layer.

[0010] In a possible implementation manner of the first aspect, an insulating layer is provided on a side of the thin film transistor layer away from the first substrate layer.

[0011] In a possible implementation manner of the first aspect, the main body structure is provided with a handle and a function button, 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, 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] 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;

[0014] The wireless communication unit is used to receive the picture to be printed;

[0015] The logic driving unit is used to output the first driving signal to the thin film transistor layer.

[0016] In a possible implementation manner of the first aspect, the electronic paper printing device further includes an input module electrically connected to the first control circuit;

[0017] The electronic paper printing device can receive the picture to be printed sent by the terminal device through the wireless communication unit, or the electronic paper printing device can receive the picture to be printed through the input module; the input module includes: a keyboard and / or a printer.

[0018] In a possible implementation manner of the first aspect, a display screen is further provided on the main body structure, and the first control circuit is electrically connected to the display screen for controlling the display screen to display the image to be printed.

[0019] 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 second 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 second direction is toward the display surface of the electronic paper display panel.

[0020] In a possible implementation manner of the first aspect, the second substrate layer is made of polyimide or PET; and a protective film layer is attached to a side of the electronic ink layer away from the first common electrode layer.

[0021] 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 and a printing structure, the main body structure is provided with a receiving cavity, the first control circuit and the printing structure are located in the receiving cavity; the printing structure includes a first substrate layer and a thin film transistor layer stacked along a first direction, and the thin film transistor layer is electrically connected to the first control circuit; the first direction faces the printing surface of the electronic paper printing device, and the printing surface is used to contact the display surface of the electronic paper display panel; the electronic paper display panel includes a first substrate layer, a first common electrode layer and an electronic ink layer stacked along the first direction; no thin film transistor is formed on the first common electrode layer, and the second direction faces the display surface of the electronic paper display panel; the first control circuit 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 thin film transistors on the entire surface, which can reduce the preparation cost and defect rate of thin film transistors prepared on the entire surface of the electronic paper display panel, thereby reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a first electronic paper display device provided in an embodiment of the present application;

[0023] Figure 2 A top view of the electronic paper display device provided in an embodiment of the present application;

[0024] Figure 3 A top view of an electronic paper printing device provided in an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of the structure of a second electronic paper display device provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 1-electronic paper printing device; 11-body structure; 111-keyboard; 112-handle; 113-function key; 1131-on / off key; 1132-erase key; 1133-shortcut key; 114-display screen; 12-first control circuit; 13-printing structure; 131-first substrate layer; 132-thin film transistor layer; 1321-thin film transistor circuit layer; 1322-pixel electrode layer; 133-insulating layer;

[0028] 2-electronic paper display panel; 21-second substrate layer; 22-first common electrode layer; 23-electronic ink layer; 24-protective film layer; 25-second common electrode layer. DETAILED DESCRIPTION

[0029] 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.

[0030] Electronic ink display technology is a type of electronic paper 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 is divided into microcapsule structure or microcup structure according to the electrophoresis type.

[0031] 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.

[0032] Figure 1 This is a schematic diagram of the structure of a first electronic paper display device provided in an embodiment of the present application. Figure 2 This is a top view of the electronic paper display device provided in the embodiment of the present application. Figure 1 and Figure 2 As shown, the electronic paper display device may include an electronic paper printing device 1 and an electronic paper display panel 2 .

[0033] The electronic paper printing device 1 may include a main body structure 11, a first control circuit 12 and a printing structure 13. 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 second direction. The electronic paper printing device 1 has a printing surface, which may contact the display surface of the electronic paper display panel 2. The contact area between the printing surface and the display surface is a printing area. The area of ​​the printing area may be positively correlated with the area of ​​the thin film transistor layer 132. The specific area may be set as required. Figure 1 The first direction may be from top to bottom, that is, the first direction is the direction from the printing surface to the display surface, and the second direction is parallel to the first direction and opposite to the direction.

[0034] 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. The main body structure 11 is provided with a receiving cavity (not shown in the figure), and the first control circuit 12 and the printed structure 13 can be located in the receiving cavity. The receiving cavity can be provided with an opening facing the display surface of the electronic paper display panel 2, so that the printed structure 13 can contact the display surface. The shape of the opening can be circular, rectangular or other shapes. The printed structure 13 may include a first substrate layer 131 and a thin film transistor layer 132 stacked along a first direction, and the thin film transistor layer 132 may be electrically connected to the first control circuit 12.

[0035] In the electronic paper display panel 2, the second substrate layer 21 can be a hard substrate, such as a glass substrate, so as to reduce costs. The second substrate layer 21 can also be a flexible substrate to improve the flexibility of the electronic paper display panel 2. The material can be polyimide (PI) or polyethylene terephthalate (PET), etc., so that the electronic paper display panel 2 can be easily fixed on the surface of a curved or irregular object, realizing a full-fit design between the electronic paper display panel 2 and the fixed surface, thereby increasing the application range of the electronic paper display panel 2.

[0036] The first common electrode layer 22 can be a metal sheet that does not require semiconductor processing, so the surface has good flatness, which can not only reduce production costs and production difficulties, but also facilitate the formation of an electronic ink layer 23 above the first common electrode layer 22. Since the first common electrode layer 22 can be arranged below the electronic ink layer 23, the material may not be transparent conductive metal, so as to further reduce costs. For example, the material can be copper, molybdenum, chromium, and nickel-chromium alloy. The materials of the second substrate layer 21 and the first common electrode layer 22 can be selected according to actual needs, and the embodiment of the present application does not impose any special restrictions on this.

[0037] The electronic ink layer 23 can change the position of charged colored particles (or ink particles) in microcapsules or microcups under the action of a 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.

[0038] 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 display screen. 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.

[0039] 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.

[0040] For ease of description, the following is an example in which the electronic paper display panel 2 displays white when the driving electric field is a positive electric field and displays black when the driving electric field is a negative electric field.

[0041] The first control circuit 12 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 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 132 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.

[0042] 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 12, 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 111 and / or a printer, etc., and the input module is electrically connected to the first control circuit 12 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 12 in a wireless or wired manner, so that the user can input the content to be printed.

[0043] The electronic paper display panel 2 may not be connected to a power source to reduce power consumption. The first control circuit 12 may output a first drive signal to the thin film transistor layer 132 according to the image to be printed. The first drive signal may be an electric field array signal, which is used to control the drive electric field between the thin film transistor layer 132 and the first common electrode layer 22, so that a potential difference is generated between the thin film transistor layer 132 and the first common electrode layer 22. The ink particles corresponding to the printing surface may undergo electrophoretic motion under the action of the drive electric field. Therefore, when the electronic paper display panel 2 is not powered on, a voltage may be applied only to the thin film transistor layer 132 of the electronic paper printing device 1, and the electronic paper display panel 2 may display the image to be printed, thereby realizing flexible printing of a local area of ​​the electronic paper display panel 2. This solution may be applied to scenes such as teaching drawing and printing, printing small advertisements or small notices on bulletin boards, etc., to realize flexible intelligent bistable display.

[0044] Specifically, the thin film transistor layer 132 may include a thin film transistor circuit layer 1321 and a pixel electrode layer 1322 stacked along a first direction. The thin film transistor circuit layer 1321 may include a plurality of thin film transistors, and the pixel electrode layer 1322 may include a plurality of pixel electrodes. Each thin film transistor may be electrically connected to a pixel electrode in the pixel electrode layer 1322 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 will not be described in detail in the embodiments of the present application.

[0045] The first control circuit 12 can output a first driving signal to the thin film transistor layer 132 according to the image to be printed. The first driving signal can control the driving electric field between each pixel electrode of the pixel electrode layer 1322 and the first common electrode layer 22, thereby realizing pixel-level display image control.

[0046] The embodiment of the present application prepares the thin film transistor on the first substrate layer 131 in the electronic paper printing device 1, thereby reducing the process area of ​​the semiconductor process, thereby improving the product yield and preparation cost. In addition, since the first common electrode layer 22 does not need to be provided with complex circuit routing, the frame distance can be reduced, and the frameless design of the electronic paper display panel 2 can be realized.

[0047] 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.

[0048] Considering that the electronic paper printing device 1 will be worn when sliding relative to the electronic paper display panel 2, a protective film layer 24 may be attached to the side of the electronic ink layer 23 away from the first common electrode layer 22, and an insulating layer 133 is provided on the side of the thin film transistor layer 132 away from the first substrate layer 131, so that the wear of the electronic ink layer 23 and the thin film transistor layer 132 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 an organic polymer material with high insulation, the material of the insulating layer 133 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 insulating layer 133 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.

[0049] See also Figure 3 The main body structure 11 may be provided with a handle 112, a function key 113 and a display screen 114 to improve the convenience of using the electronic paper printing device 1. The handle 112 may be formed integrally with the main body structure 11, thereby simplifying the structure. The handle 112 may also be provided with a metal member (not shown) electrically connected to the first control circuit 12, and the metal member may be exposed on the handle 112 to serve as a grounding point of the electronic paper printing device 1.

[0050] The function button 113 may be electrically connected to the first control circuit 12, and the first control circuit 12 may also be used to execute a corresponding control function according to a trigger signal of the function button 113. Figure 3 , the function key 113 may include at least one of the following: a switch key 1131, an erase key 1132, and one or more shortcut keys 1133. The user can control the working state of the electronic paper printing device 1 through the switch key 1131. The erase key 1132 can be used to erase the content displayed on the electronic paper display panel 2. For example, after the user presses the erase key 1132, the first control circuit 12 can control the driving electric field applied between the pixel electrode layer 1322 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 1132 so that it can only erase lines, or only erase colors, single color blocks, etc.

[0051] The shortcut key 1133 can be used to trigger the first control circuit 12 to output a drive signal corresponding to the target printing screen to the thin film transistor layer 132. The target printing screen can be a horizontal line, a vertical line, and a commonly used graphic and text. The display screen 114 can be electrically connected to the first control circuit 12 to display the screen to be printed. In some embodiments, the electronic paper printing device 1 can also be equipped with a photodetector electrically connected to the first control circuit 12. The photodetector can detect the displacement of the electronic paper printing device 1 and generate a displacement signal, convert the displacement signal into an electrical pulse signal and transmit it to the first control circuit 12. After processing and conversion, the first control circuit 12 can control the movement of the cursor arrow on the display screen 114, so that when the user prints a large screen, the screen to be printed can be split and any sub-screen to be printed can be selected for printing. The working principle of the photodetector can refer to the prior art, and the embodiments of the present application will not be repeated here.

[0052] 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 common electrode layer 25 disposed between the protective film layer 24 and the electronic ink layer 23. The second common electrode layer 25 may be a hollow structure, that is, a plurality of array-arranged opening areas are provided on the second common electrode layer 25. When the electronic paper printing device 1 is printing, for example, a positive electric field is applied, since the second common electrode layer 25 has a plurality of opening areas, the electronic paper printing device 1 can still generate a driving electric field between the thin film transistor layer 132 and the first common electrode layer 22, so that the white ink particles move upward and the black ink particles move downward.

[0053] Furthermore, the electronic paper display panel 2 may further include a second control circuit and a reset key (not shown), and the second control circuit may be electrically connected to the second common electrode layer 25 and the reset key, respectively. When the electronic paper display panel 2 is powered on, the reset key may generate a reset signal after being triggered and transmit it to the second control circuit, and the second control circuit may output a second drive signal to the second common electrode layer 25 after receiving the reset signal, so as to control the electric field applied between the second common electrode layer 25 and the first common electrode layer 22, so that the electronic paper display panel 2 displays a pure color picture.

[0054] The embodiment of the present application provides an electronic paper printing device and an electronic paper display panel, wherein the electronic paper printing device includes a main body structure, a first control circuit and a printing structure, wherein the main body structure is provided with a receiving cavity, wherein the first control circuit and the printing structure are located in the receiving cavity; the printing structure includes a first substrate layer and a thin film transistor layer stacked along a first direction, wherein the thin film transistor layer is electrically connected to the first control circuit; the first direction faces the printing surface of the electronic paper printing device, and the printing surface is used to contact the display surface of the electronic paper display panel; the electronic paper display panel includes a first substrate layer, a first common electrode layer and an electronic ink layer stacked along a first direction; no thin film transistor is formed on the first common electrode layer, and the second direction faces the display surface of the electronic paper display panel; the first control circuit 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 thin film transistors on the entire surface, which can reduce the preparation cost and defect rate of preparing thin film transistors on the entire surface, thereby reducing the production cost.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 and a printed structure, wherein the main body structure is provided with a receiving cavity, and the first control circuit and the printed structure are located in the receiving cavity; The printing structure comprises a first substrate layer and a thin film transistor layer stacked along a first direction, wherein the thin film transistor layer is electrically connected to the first control circuit; the first direction faces a printing surface of the electronic paper printing device, and the printing surface is used to contact a display surface of the electronic paper display panel; The first control circuit 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 thin film transistor layer includes a thin film transistor circuit layer and a pixel electrode layer stacked along a first direction, and the pixel electrode layer includes a plurality of pixel electrodes; The first control circuit is specifically used to output a first driving signal to the thin film transistor layer according to the image to be printed, and the first driving signal is specifically used to control the driving electric field between each pixel electrode of the pixel electrode layer and the first common electrode layer.

3. The electronic paper printing device according to claim 1, characterized in that: An insulating layer is disposed on a side of the thin film transistor layer away from the first substrate layer.

4. The electronic paper printing device according to claim 1, characterized in that: The main body structure is provided with a handle and a function button, 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, 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.

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 driving 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. The electronic paper printing device according to claim 5, characterized in that: The electronic paper printing device further includes an input module electrically connected to the first control circuit; The electronic paper printing device can receive the picture to be printed sent by the terminal device through the wireless communication unit, or the electronic paper printing device can receive the picture to be printed through the input module; The input module includes: a keyboard and / or a printer.

7. The electronic paper printing device according to any one of claims 1 to 6, characterized in that: The main body structure is also provided with a display screen, and the first control circuit is electrically connected to the display screen and is used to control the display screen to display the picture to be printed.

8. An electronic paper display panel, characterized in that: include: A second substrate layer, a first common electrode layer and an electronic ink layer stacked along a second direction; No thin film transistor is formed on the first common electrode layer. 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 the ink particles of the electronic ink layer; the second direction is toward the display surface of the electronic paper display panel.

9. The electronic paper display panel according to claim 8, characterized in that: The material of the second substrate layer is polyimide or PET; and a protective film layer is attached to a side of the electronic ink layer away from the first common electrode layer.

10. The electronic paper display panel according to claim 9, characterized in that: The electronic paper display panel further includes: a second control circuit, a reset button, and a second common electrode layer disposed between the protective film 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 common electrode layer and the reset key, respectively, and is used to output a second drive signal to the second common electrode layer after receiving a reset signal from the reset key. The second drive signal is used to control the 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.

Images