TFT printed electronic paper display module and preparation method thereof

Abstract

The invention discloses a TFT (Thin Film Transistor) printed electronic paper display module and a preparation method thereof, and the TFT printed electronic paper display module comprises a printed transistor, a common electrode and a driving electrode which are at least arranged on one side of the printed transistor, and electronic paper of which the two ends are electrically connected with the common electrode and the driving electrode respectively, the printed transistor comprises a flexible substrate, a gate electrode layer and a first dielectric layer which are printed on the front surface of the flexible substrate, a source electrode layer and a drain electrode layer and a semiconductor layer which are printed on the front surface of the first dielectric layer, and a second dielectric layer printed on the semiconductor layer; and the driving electrode is electrically connected with the source electrode layer or the drain electrode layer. The display module has the advantages that the display module is flexible, can be bent and is more durable and wider in application range; double-sided display can be realized; existing chemical sputtering and etching are replaced, zero wastewater discharge is realized, and the method is more environment-friendly; the multi-element display function of the TFT display module can be utilized to realize multi-element display, so that the display content of the electronic paper in the unit area is richer.

Description

Technical Field

[0001] The present invention relates to the field of display modules, and in particular to a TFT printed electronic paper display module and a preparation method thereof. Background Art

[0002] There are two technologies in the current electronic paper display module industry. The first is the printed segmented screen carrier board combined module display technology. The printed segmented screen carrier board combined module display technology refers to a display solution that combines segmented screens and printing technology. This technology is usually used in LCD screens, especially in scenarios where specific characters and numbers need to be displayed, such as electronic watches, calculators, instruments, etc. The segmented screen, also known as the segmented screen, is a special LCD screen that can only display or not display fixed patterns at specified locations, and is mainly used to display numbers and characters. The defect of this method is that the pattern to be displayed must be printed and then combined with electronic paper to form a display module. Therefore, this technology has great limitations on the displayed content, and can only display pre-printed patterns, so the displayed content becomes single. The second is the glass substrate etching TFT combined module display technology. The glass substrate etching TFT combined module display technology refers to the semiconductor material and ITO (indium tin oxide) stored in the designed order on the glass substrate for photoresist coating, and then etching and cleaning to form a part of the circuit, which has the advantage of diversified display patterns. The defects of the second method include that the overall structure of the product is relatively thick; the product cannot be bent; and the manufacturing process of the entire carrier is a glass substrate sputtering and chemical etching method, which adds a huge burden to environmental pollution.

[0003] In view of this, it is necessary to provide a TFT printed electronic paper display module and a preparation method thereof. Summary of the invention

[0004] The present invention provides a TFT printed electronic paper display module and a preparation method thereof, which effectively solves the problems of existing electronic paper display modules such as being unable to bend, unable to display multiple elements, and polluting the environment during production.

[0005] The technical solution adopted by the present invention is: A TFT printed electronic paper display module comprises a printed transistor, a common electrode and a driving electrode at least arranged on one side of the printed transistor, and electronic paper with two ends electrically connected to the common electrode and the driving electrode respectively. The printed transistor comprises a flexible substrate, a gate electrode layer and a first dielectric layer printed on the front of the flexible substrate, a source electrode layer, a drain electrode layer and a semiconductor layer printed on the front of the first dielectric layer, and a second dielectric layer printed on the semiconductor layer. The driving electrode is electrically connected to the source electrode layer or the drain electrode layer.

[0006] Furthermore, the common electrode includes a first common electrode, the driving electrode includes a first driving electrode, the first common electrode and the first driving electrode are arranged on the front of the printed transistor, the first common electrode is printed on the front of the second dielectric layer, and the first driving electrode is electrically connected to the drain electrode layer.

[0007] Furthermore, the common electrode includes a second common electrode, the driving electrode includes a second driving electrode, the first common electrode and the second driving electrode are arranged on the back of the printed transistor, the flexible substrate is provided with a No. 1 through hole, the first dielectric layer is provided with a No. 2 through hole, the second common electrode is printed on the back of the flexible substrate, and the second driving electrode is printed on the back of the flexible substrate and is electrically connected to the drain electrode layer through the No. 1 through hole and the No. 2 through hole.

[0008] Furthermore, the flexible substrate is one of PI film, PET film and POF film.

[0009] Furthermore, the source electrode and the drain electrode are both made of conductive gold paste material.

[0010] Furthermore, the semiconductor layer is made of carbon nanotube material.

[0011] A method for preparing a TFT printed electronic paper display module, the method being used to prepare the TFT printed electronic paper display module, comprising the following steps: S1. Pre-treating the flexible substrate; S2. When the electronic paper is arranged on the back of the flexible substrate, the flexible substrate is drilled, and a gate electrode layer is printed on the front of the drilled flexible substrate; when the electronic paper is not arranged on the back of the flexible substrate, the gate electrode layer is directly printed on the front of the flexible substrate using a flat screen printer; S3. When electronic paper is disposed on the back of the flexible substrate, a first dielectric layer is printed on the gate electrode layer using a flat screen printer, and holes are drilled on the first dielectric layer; when electronic paper is not disposed on the back of the flexible substrate, holes do not need to be drilled on the first dielectric layer; S4. When electronic paper is provided on the back of the flexible substrate, a driving electrode and a common electrode are printed on the back of the flexible substrate, and then a source electrode and a drain electrode are printed on the gate electrode layer using a flat screen printer; when electronic paper is not provided on the back of the flexible substrate, a source electrode and a drain electrode are directly printed on the gate electrode layer using a flat screen printer; S5, disposing a semiconductor layer so that the semiconductor layer is electrically connected to the source electrode and the drain electrode; S6, when it is only necessary to set the electronic paper on the back of the flexible substrate, assemble the electronic paper so that the two ends of the electronic paper are electrically connected to the common electrode and the driving electrode on the back of the flexible substrate respectively, and the assembly is completed; when it is necessary to set the electronic paper on the front of the flexible substrate, directly enter S8; S7. Print a common electrode and a driving electrode on the front side of the semiconductor layer, and then assemble the electronic paper so that two ends of the electronic paper are electrically connected to the common electrode and the driving electrode located on the front side of the flexible substrate, respectively.

[0012] Furthermore, the pretreatment method of S1 is to use IR and resistance wire heating heat treatment oven to perform dimensional stability treatment on the cleaned flexible substrate.

[0013] Furthermore, the method of drilling holes in the flexible substrate in S2 is laser drilling or CNC drilling.

[0014] Furthermore, the specific method of assembling the electronic paper in S7 and S6 is to use a hydraulic press or a vacuum fast pressing device to stick the electronic paper on the driving electrode and the common electrode.

[0015] Beneficial effects of the invention: Compared with traditional glass-based electronic paper display modules, the display module of the present application is thinner overall, and the present application adopts a printing process to prepare transistors. The display module of the present application is flexible and can be bent, is more durable, and has a wider range of applications.

[0016] The display module of the present application can realize double-sided display and can be used in scenes such as stations and terminals with large traffic flow, large space, and large demand for display information, effectively reducing the number of traditional single-sided display devices and saving costs and installation space.

[0017] The display module of the present application adopts a printing process to replace the existing chemical sputtering and etching, achieving zero wastewater discharge and being more environmentally friendly.

[0018] Compared with the traditional broken-code screen electronic paper display module, the display module of the present application can utilize the multi-display function of the TFT display module to realize multi-display, making the electronic paper display content within the unit area richer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall schematic diagram of a TFT printed electronic paper display module provided in an embodiment of the present application, in which electronic paper is installed on both sides of a flexible substrate.

[0020] Figure 2 This is an overall schematic diagram of a TFT printed electronic paper display module provided in an embodiment of the present application, in which electronic paper is installed on the back of a flexible substrate.

[0021] Figure 3 This is an overall schematic diagram of a TFT printed electronic paper display module provided in an embodiment of the application, in which electronic paper is installed on the front side of a flexible substrate.

[0022] Figure 4This is a control schematic diagram of the TFT printed electronic paper display module provided in the embodiment of the present application cooperating with an external control system.

[0023] Figure 5 A schematic diagram of the matrix structure of a TFT printed electronic paper display module provided in an embodiment of the present application.

[0024] Figure 6 This is a control schematic diagram of the TFT printed electronic paper display module and MCU provided in the embodiment of the present application.

[0025] Figure 7 A schematic diagram of an equivalent circuit of a TFT printed electronic paper display module provided in an embodiment of the present application.

[0026] Figure 8 This is a schematic diagram of another equivalent circuit of the TFT printed electronic paper display module provided in an embodiment of the present application.

[0027] Markings in the figure are: 1, electronic paper; 2, flexible substrate; 3, gate electrode layer; 4, first dielectric layer; 5, source electrode layer; 6, drain electrode layer; 7, semiconductor layer; 8, second dielectric layer; 9, first common electrode; 10, first drive electrode; 11, second common electrode; 12, second drive electrode. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the first embodiment provided by the present application is a TFT printed electronic paper display module, comprising a printed transistor and a common electrode and a driving electrode arranged on at least one side of the printed transistor, and an electronic paper 1 whose two ends are electrically connected to the common electrode and the driving electrode respectively, wherein the printed transistor comprises a flexible substrate 2, a gate electrode layer 3 and a first dielectric layer 4 printed on the front side of the flexible substrate 2, a source electrode layer 5 and a drain electrode layer 6 and a semiconductor layer 7 printed on the front side of the first dielectric layer 4, and a second dielectric layer 8 printed on the semiconductor layer 7, and the driving electrode is electrically connected to the source electrode layer 5 or the drain electrode layer 6.

[0030] It should be noted that the electronic paper 1 is an existing structure, and the core component of the electronic paper 1 is electronic ink (E Ink), which is a special material composed of millions of tiny microcapsules, each of which contains positively charged white particles and negatively charged black particles suspended in a clean liquid. When an electric field is applied, these particles move according to the direction of the electric field, thereby displaying different colors. For example, when a negative electric field is applied, the white particles rise to the top of the microcapsule and appear white, while the black particles sink to the bottom and appear black. Conversely, when a positive electric field is applied, the black particles rise and appear black, while the white particles sink and appear white. The Vscan end represents the source electrode and the drain electrode. For ease of understanding and description, they are collectively referred to as the source and drain electrodes in the following.

[0031] In actual use, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the display module of the present application is controlled by an external control system MCU. When actually used, the IO terminal of the MCU outputs the voltage to the displacement buffer, and the gate electrode layer 3 (Vdata terminal) provides positive and negative charges and pressurizes the source electrode and the drain electrode under the control of the MCU through the serial port input (multiple parallel port outputs realize the control of multiple channels). The source and drain electrodes (Vscan terminal) are scanned to a saturated state to realize the graphic conversion of the electronic paper 1. The first step is to send a positive charge signal to pressurize the gate electrode layer 3 (Vdata terminal), so that when the source and drain electrodes (Vscan terminal) are scanned to a saturated voltage, the driving electrode is used to make the electronic paper 1 electrode work and start the electronic paper 1 display. The second step is to send a negative charge signal to pressurize the gate electrode layer 3 (Vdata terminal), so that when the source and drain electrodes (Vscan terminal) are scanned to a saturated voltage, the driving electrode (Vdrive) works to start the electronic paper 1 (EINK) display pattern conversion.

[0032] In the above design, the thickness of the entire display module is lower and can be displayed when bent, which can achieve diversified display and make the display content richer.

[0033] Specifically: Figure 1 and Figure 3 As shown, the common electrode includes a first common electrode 9, and the driving electrode includes a first driving electrode 10. The first common electrode 9 and the first driving electrode 10 are arranged on the front of the printed transistor. The first common electrode 9 is printed on the front of the second dielectric layer 8, and the first driving electrode 10 is electrically connected to the drain electrode layer 6.

[0034] In actual use, the first driving electrode 10 and the first common electrode 9 are electrically connected to two ends of the same electronic paper 1 .

[0035] In the above design, after the first common electrode 9 and the first driving electrode 10 are electrically connected to two ends of the same electronic paper 1 , the normal operation of the electronic paper 1 can be ensured.

[0036] Specifically: Figure 1 and Figure 2 As shown, the common electrode includes a second common electrode 11, the driving electrode includes a second driving electrode 12, the first common electrode 9 and the second driving electrode 12 are arranged on the back of the printed transistor, the flexible substrate 2 is provided with a No. 1 through hole, the first dielectric layer 4 is provided with a No. 2 through hole, the second common electrode 11 is printed on the back of the flexible substrate 2, and the second driving electrode 12 is printed on the back of the flexible substrate 2 and is electrically connected to the drain electrode layer 6 through the No. 1 through hole and the No. 2 through hole.

[0037] In the above design, the second driving electrode 12 and the second common electrode 11 are respectively connected to two ends of the same electronic paper 1 , so that the normal operation of the electronic paper 1 can be ensured.

[0038] Specifically, the flexible substrate 2 is a PI film, a PET film, a POF film, etc.

[0039] In the above design, the PI film, PET film and POF film all have good plasticity, which can ensure that the substrate can be bent during use.

[0040] Specifically, the source electrode layer 5 and the drain electrode layer 6 are both made of conductive gold paste materials.

[0041] In the above design, the conductive gold paste can be screen printed and has good low resistance and high conductivity.

[0042] Specifically: the semiconductor layer 7 is made of carbon nanotube material.

[0043] In the above design, the carbon nanotube material has excellent electrical and thermal conductivity, and has the characteristics of light weight and high strength. Using the carbon nanotube material as the semiconductor layer 7 can effectively meet the performance of the transistor.

[0044] The second embodiment provided in the present application is a method for preparing a TFT printed electronic paper 1 display module, the method being used to prepare the TFT printed electronic paper display module, comprising the following steps: S1, pre-treating the flexible substrate 2; S2. When the electronic paper 1 is disposed on the back of the flexible substrate 2, the flexible substrate 2 is drilled, and the gate electrode layer 3 is printed on the front of the drilled flexible substrate 2; when the electronic paper 1 is not disposed on the back of the flexible substrate 2, the gate electrode layer 3 is directly printed on the front of the flexible substrate 2 using a flat screen printer; S4. When the electronic paper 1 is disposed on the back of the flexible substrate 2, a first dielectric layer 4 is printed on the gate electrode layer 3 using a flat screen printer, and holes are drilled on the first dielectric layer 4. When the electronic paper 1 is not disposed on the back of the flexible substrate 2, holes do not need to be drilled on the first dielectric layer 4. S5. When the electronic paper 1 is disposed on the back of the flexible substrate 2, the driving electrode and the common electrode are printed on the back of the flexible substrate 2, and then the source electrode and the drain electrode are printed on the gate electrode layer 3 using a flat screen printer; when the electronic paper 1 is not disposed on the back of the flexible substrate 2, the source electrode and the drain electrode are directly printed on the gate electrode layer 3 using a flat screen printer; S6, disposing the semiconductor layer 7 so that the semiconductor layer 7 is electrically connected to the source electrode and the drain electrode; S7, when it is only necessary to set the electronic paper 1 on the back side of the flexible substrate 2, assemble the electronic paper 1 so that the two ends of the electronic paper 1 are respectively electrically connected to the common electrode and the driving electrode on the back side of the flexible substrate 2, and the assembly is completed; when it is necessary to set the electronic paper 1 on the front side of the flexible substrate 2, directly enter S8; S8, printing a common electrode and a driving electrode on the front side of the semiconductor layer 7, and then assembling the electronic paper 1 so that two ends of the electronic paper 1 are electrically connected to the common electrode and the driving electrode located on the front side of the flexible substrate 2, respectively.

[0045] In the above design, the transistor is produced by printing process, and then the printed transistor is assembled with the electronic paper 1 to form a display module, which can make the entire display module have good flexibility and can be bent at different angles. The entire production process will not produce wastewater similar to glass substrate sputtering and chemical etching, reducing pollution to the environment. It can also achieve a thinner thickness of the entire display module and enhance the application range of the product.

[0046] Specifically, the pretreatment method of S1 is to use IR and resistance wire heating heat treatment oven to perform dimensional stability treatment on the cleaned flexible substrate 2.

[0047] In the above design, the use of IR and resistance wire heating heat treatment drying tunnel and oven can effectively dry the cleaned flexible substrate 2.

[0048] Specifically, the method of drilling holes in the flexible substrate 2 in S2 is laser drilling or CNC drilling.

[0049] In the above design, drilling the flexible substrate 2 by laser or CNC drilling can ensure the accuracy of drilling the flexible substrate 2 .

[0050] Specifically, the specific method of assembling the electronic paper 1 in S7 and S8 is: using a hydraulic press or a vacuum fast pressing device to stick the electronic paper 1 on the driving electrode and the common electrode.

[0051] In the above design, the strong power of the hydraulic press or vacuum quick pressing equipment can be used to ensure a firm connection between the electronic paper 1 and the common electrode and the driving electrode.

[0052] like Figure 3 As shown, the third embodiment provided by the present application is a TFT printed electronic paper 1 display module, including a printed transistor and a common electrode and a driving electrode arranged on the front of the printed transistor, and an electronic paper 1 electrically connected to the common electrode and the driving electrode. The printed transistor includes a flexible substrate 2, a gate electrode layer 3 and a first dielectric layer 4 printed on the front of the flexible substrate 2, a source electrode layer 5 and a drain electrode layer 6 and a semiconductor layer 7 printed on the front of the first dielectric layer 4, and a second dielectric layer 8 printed on the semiconductor layer 7.

[0053] In the above design, the electronic paper 1 is displayed on the front side of the flexible substrate 2 .

[0054] like Figure 2 As shown, the fourth embodiment provided by the present application is a TFT printed electronic paper 1 display module, comprising a printed transistor, a common electrode and a driving electrode arranged on the back of the printed transistor, and an electronic paper 1 electrically connected to the common electrode and the driving electrode, wherein the printed transistor comprises a flexible substrate 2, a gate electrode layer 3 and a first dielectric layer 4 printed on the front of the flexible substrate 2, a source electrode layer 5 and a drain electrode layer 6 and a semiconductor layer 7 printed on the front of the first dielectric layer 4, and a second dielectric layer 8 printed on the semiconductor layer 7. The flexible substrate 2 is provided with a No. 1 through hole, the first dielectric layer 4 is provided with a No. 2 through hole, the second common electrode 11 is printed on the back of the flexible substrate 2, and the second driving electrode 12 layer is printed on the back of the flexible substrate 2 and is electrically connected to the drain electrode layer 6 through the No. 1 through hole and the No. 2 through hole.

[0055] In the above design, the electronic paper 1 is displayed on the back of the flexible substrate 2, which can meet the use of the display module in unconventional environments.

[0056] like Figure 1As shown, the fifth embodiment provided by the present application is a TFT printed electronic paper 1 display module, comprising a printed transistor, a common electrode and a driving electrode arranged on the front of the printed transistor, and an electronic paper 1 electrically connected to the common electrode and the driving electrode, wherein the printed transistor comprises a flexible substrate 2, a gate electrode layer 3 and a first dielectric layer 4 printed on the front of the flexible substrate 2, a source electrode layer 5 and a drain electrode layer 6 and a semiconductor layer 7 printed on the front of the first dielectric layer 4, and a second dielectric layer 8 printed on the semiconductor layer 7. The common electrode comprises a first common electrode 9, and the driving electrode comprises a first driving electrode 10, wherein the first common electrode 9 and the first driving electrode 10 are arranged on the front of the printed transistor, the first common electrode 9 is printed on the front of the second dielectric layer 8, and the first driving electrode 10 layer is electrically connected to the drain electrode layer 6. The common electrode further includes a second common electrode 11, and the driving electrode further includes a second driving electrode 12. The first common electrode 9 and the second driving electrode 12 are arranged on the back of the printed transistor, the flexible substrate 2 is provided with a No. 1 through hole, the first dielectric layer 4 is provided with a No. 2 through hole, the second common electrode 11 is printed on the back of the flexible substrate 2, and the second driving electrode 12 is printed on the back of the flexible substrate 2 and passes through the No. 1 through hole and the No. 2 through hole to be electrically connected to the drain electrode layer 6. The first common electrode 9 and the first driving electrode 10 are respectively connected to the two ends of one electronic paper 1, and the second common electrode 11 and the second driving electrode 12 are respectively connected to the two ends of another electronic paper 1.

[0057] In the above design, two pieces of electronic paper 1 can display content simultaneously, so that the entire display module can display information in different directions, and can be widely used in scenes with large traffic flow and large space such as exhibition halls, railway platforms and terminals.

[0058] To further explain in detail, it should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A TFT printed electronic paper display module, characterized in that: An electronic paper (1) comprising a printed transistor and a common electrode and a driving electrode at least arranged on one side of the printed transistor, and two ends electrically connected to the common electrode and the driving electrode respectively. The printed transistor comprises a flexible substrate (2), a gate electrode layer (3) and a first dielectric layer (4) printed on the front of the flexible substrate (2), a source electrode layer (5) and a drain electrode layer (6) and a semiconductor layer (7) printed on the front of the first dielectric layer (4), and a second dielectric layer (8) printed on the semiconductor layer (7); the driving electrode is electrically connected to the source electrode layer (5) or the drain electrode layer (6).

2. The TFT printed electronic paper display module according to claim 1, characterized in that: The common electrode comprises a first common electrode (9), and the drive electrode comprises a first drive electrode (10). The first common electrode (9) and the first drive electrode (10) are arranged on the front side of the printed transistor, the first common electrode (9) is printed on the front side of the second dielectric layer (8), and the first drive electrode (10) is electrically connected to the drain electrode layer (6).

3. The TFT printed electronic paper display module according to claim 1 or 2, characterized in that: The common electrode comprises a second common electrode (11), the drive electrode comprises a second drive electrode (12), the second common electrode (11) and the second drive electrode (12) are arranged on the back of the printed transistor, the flexible substrate (2) is provided with a first through hole, the first dielectric layer (4) is provided with a second through hole, the second common electrode (11) is printed on the back of the flexible substrate (2), the second drive electrode (12) is printed on the back of the flexible substrate (2) and passes through the first through hole and the second through hole to be electrically connected to the drain electrode layer (6).

4. The TFT printed electronic paper display module according to claim 1, characterized in that: The flexible substrate (2) is one of a PI film, a PET film and a POF film.

5. The TFT printed electronic paper display module according to claim 1, characterized in that: The source electrode layer (5) and the drain electrode layer (6) are both made of conductive gold paste material.

6. The TFT printed electronic paper display module according to claim 1, characterized in that: The semiconductor layer (7) is made of carbon nanotube material.

7. A method for preparing a TFT printed electronic paper display module, the method being used to prepare the TFT printed electronic paper display module according to any one of claims 1 to 6, characterized in that: The steps include: S1, pre-treating the flexible substrate (2); S2. When the electronic paper (1) is disposed on the back of the flexible substrate (2), the flexible substrate (2) is drilled, and a gate electrode layer (3) is printed on the front of the drilled flexible substrate (2); when the electronic paper (1) is not disposed on the back of the flexible substrate (2), the gate electrode layer (3) is directly printed on the front of the flexible substrate (2) using a flat screen printer; S3. When the electronic paper (1) is disposed on the back of the flexible substrate (2), a first dielectric layer (4) is printed on the gate electrode layer (3) using a flat screen printer, and holes are drilled in the first dielectric layer (4); when the electronic paper (1) is not disposed on the back of the flexible substrate (2), it is not necessary to drill holes in the first dielectric layer (4); S4. When the electronic paper (1) is disposed on the back of the flexible substrate (2), the driving electrode and the common electrode are printed on the back of the flexible substrate (2), and then the source electrode and the drain electrode are printed on the gate electrode layer (3) using a flat screen printer; when the electronic paper (1) is not disposed on the back of the flexible substrate (2), the source electrode and the drain electrode are directly printed on the gate electrode layer (3) using a flat screen printer; S5, disposing a semiconductor layer (7) so that the semiconductor layer (7) is electrically connected to the source electrode and the drain electrode; S6, when it is only necessary to arrange the electronic paper (1) on the back side of the flexible substrate (2), assemble the electronic paper (1) so that the two ends of the electronic paper (1) are respectively electrically connected to the common electrode and the driving electrode located on the back side of the flexible substrate (2), and the assembly is completed; when it is necessary to arrange the electronic paper (1) on the front side of the flexible substrate (2), directly proceed to S8; S7, printing a common electrode and a driving electrode on the front side of the semiconductor layer (7), and then assembling the electronic paper (1) so that two ends of the electronic paper (1) are electrically connected to the common electrode and the driving electrode located on the front side of the flexible substrate (2), respectively.

8. The method for preparing a TFT printed electronic paper display module according to claim 7, characterized in that: The pretreatment method of S1 is to use IR and resistance wire heating heat treatment oven to treat the cleaned flexible substrate (2) for dimensional stability.

9. The method for preparing a TFT printed electronic paper display module according to claim 7, characterized in that: The method for drilling holes in the flexible substrate (2) in S2 is laser drilling or CNC drilling.

10. The method for preparing a TFT printed electronic paper display module according to claim 7, characterized in that: The specific method for assembling the electronic paper (1) in S7 and S6 is: using a hydraulic press or a vacuum fast pressing device to stick the electronic paper (1) on the driving electrode and the common electrode.

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