Modularized electronic ink screen

Abstract

The invention relates to the technical field of electronic ink screens, in particular to a modular electronic ink screen which is formed by integrating a plurality of electronic price tags, the plurality of electronic price tags have linkage and can realize an integral display function, the modular electronic ink screen comprises the plurality of electronic price tags and an integral screen which is limited and spliced through a metal middle frame, and a protection panel is mounted on the upper surface of the screen. A rear cover is mounted on the lower surface; the main control chip processor STM32G070CBT6 is connected with each electronic price tag through a driving module, is additionally provided with a plurality of screen controllers, is internally provided with a Bluetooth module supporting a Bluetooth protocol 5.0 and below, and is matched with an external intrinsic safety mobile phone or tablet computer, and the main control chip processor STM32G070CBT6 and the external intrinsic safety mobile phone or tablet computer are in communication connection after being matched; and the battery assembly is used for supplying power to the main control chip processor STM32G070CBT6 according to the instruction received by the NFC antenna. According to the invention, the cost is greatly reduced, the display of the content of various boards with different sizes and different specifications can be met, and the maintenance is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic ink screens, and in particular to a modular electronic ink screen. Background Art

[0002] Electronic ink screen is a display technology that imitates the display effect of paper. It has the characteristics of low power consumption, readability in sunlight, and wide viewing angle. It can truly replace the traditional static printed boards underground one to one, and the potential market demand is huge.

[0003] The existing large-size integrated electronic ink screens on the market have high production costs due to the monopoly of electronic paper basic core material manufacturers and the corresponding complex production process. At the same time, due to the special structure of the screen, once a problem occurs, the maintenance cost may be very high, which limits its widespread application in the coal mining field. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a modular electronic ink screen, which greatly reduces the cost, can meet the display of the content of signboards of various sizes and specifications, and is easy to maintain.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A modular electronic ink screen is formed by integrating a number of electronic price tags, which are linked and can realize the overall display function, mainly including: A plurality of electronic price tags are spliced ​​into an integral screen through a metal middle frame, a protective panel is installed on the upper surface of the screen, and a back cover is installed on the lower surface; The main control chip processor STM32G070CBT6 is connected to each electronic price tag through a driver module, plus multiple screen controllers, with a built-in Bluetooth module that supports Bluetooth protocol 5.0 and below, and is paired with an external intrinsically safe mobile phone or tablet. After pairing is completed, the main control chip processor STM32G070CBT6 and the external intrinsically safe mobile phone or tablet are connected to achieve communication; The battery assembly is used to supply power to the main control chip processor STM32G070CBT6 according to the instructions received by the NFC antenna.

[0006] Furthermore, when the battery assembly needs to supply power, the NFC function of the peripheral intrinsically safe mobile phone or tablet is used to approach the NFC antenna to light up the chip on the main control board and send a clock signal to the main control chip processor STM32G070CBT6. Through the Ι²C communication protocol, the optocoupler D2 sends a signal to the power control board, and the battery assembly starts to supply the main control board with a power supply voltage of 5V. Through the linear regulator D3, the 5V is reduced to 3.3V to power the main control chip processor STM32G070CBT6.

[0007] Furthermore, the battery assembly includes an intrinsically safe battery and an intrinsically safe power supply circuit. The intrinsically safe battery adopts a wireless power supply method. The intrinsically safe power supply circuit adopts a three-level electronic protection circuit and a one-level resistor current limiting circuit. The three-level electronic protection circuit is composed of an overvoltage circuit and an overcurrent circuit. The positive and negative outputs of the first-level electronic protection circuit constitute the positive and negative poles of the 5V power supply of the second-level electronic protection circuit, and the positive and negative outputs of the second-level electronic protection circuit constitute the positive and negative poles of the 5V power supply of the third-level electronic protection circuit.

[0008] Furthermore, when the content needs to be adjusted, the modular electronic ink screen of the present invention includes the following steps: after the content to be edited is completed on the peripheral intrinsically safe mobile phone or tablet, the data is sent down, and the main control chip processor STM32G070CBT6 processes the data information and outputs a signal, and uses SPI control, and the clock and data signals are sent to the driving module through the 24PIN pin header end at the X1 position of the FPC line connection; when the driving module receives the data information and the clock signal, it will process the data information and the clock signal respectively, convert the data information into information that can be recognized by the screen, and adjust the cycle of the driving clock signal at the same time, and send the adjusted clock signal to each electronic price tag, and each electronic price tag automatically responds and recognizes the corresponding data in the order defined by the serial port.

[0009] Furthermore, the driving module is provided with a boost short-circuit protection circuit, which includes a unidirectional thyristor Q1, a voltage stabilizing diode VD6, a 0.1UF capacitor C17, a 1K resistor RT2 and a 10K resistor R4. The boost outputs VGH and VHL in the screen are connected to the cathode K of the unidirectional thyristor Q1, the first end of the 0.1UF capacitor C17 and the 1K RT2, the gate G of the unidirectional thyristor Q1 is connected to the first end of the 10K resistor R4, the second end of the 0.1UF capacitor C17 and the 1K resistor RT2 is connected to the second end of the 10K resistor R4, and is connected to the anode of the voltage stabilizing diode VD6, and the cathode of the voltage stabilizing diode VD6 is grounded. The voltage of VGH and VHL is limited to within ±16V, and the current is 200ma.

[0010] In order to further reduce the cost, the present invention can adopt a design in which the fixed content in the overall display content is completed by traditional printing technology, and the content that needs to be changed in time is completed by electronic technology.

[0011] The present invention integrates the electronic price tag into a large-size electronic ink screen through modularization, which can meet the display of the content of signboards of various sizes and specifications, while greatly reducing the cost, and the modularization is convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 A module block diagram of a modular electronic ink screen according to an embodiment of the present invention.

[0013] Figure 2 This is a power supply circuit diagram of the battery assembly in an embodiment of the present invention.

[0014] Figure 3 It is the first-level electronic protection circuit in the embodiment of the present invention.

[0015] Figure 4 This is the second-level electronic protection circuit in the embodiment of the present invention.

[0016] Figure 5 This is the third-level electronic protection circuit in the embodiment of the present invention.

[0017] Figure 6 This is the SPI communication circuit of the electronic ink screen in the embodiment of the present invention.

[0018] Figure 7 This is a boost protection circuit for an electronic ink screen in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0020] Based on the characteristics of relatively mature electronic price tag technology, relatively low cost, relatively weak monopoly, and very convenient acquisition, the present invention has developed a modular electronic ink screen, such as Figure 1 As shown, including: Several electronic price tags are spliced ​​into an integral screen through a metal middle frame limiter, a protective panel is installed on the upper surface of the screen, and a back cover is installed on the lower surface. Several electronic price tags are linked and can realize the overall display function; The main control chip processor STM32G070CBT6 is connected to each electronic price tag through a driver module, plus multiple screen controllers, with a built-in Bluetooth module that supports Bluetooth protocol 5.0 and below, and is paired with an external intrinsically safe mobile phone or tablet. After pairing is completed, the main control chip processor STM32G070CBT6 and the external intrinsically safe mobile phone or tablet are connected to achieve communication; The battery assembly is used to supply power to the main control chip processor STM32G070CBT6 according to the instructions received by the NFC antenna. Specifically, when power is needed, Figure 2 As shown, through the NFC function of the peripheral intrinsically safe mobile phone or tablet, close to the NFC antenna, the chip on the main control board is lit up, and a clock signal is sent to the main control chip processor STM32G070CBT6. Through the Ι²C communication protocol, the optocoupler D2 sends a signal to the power control board, and the battery assembly starts to supply the main control board with a power supply voltage of 5V. Through the linear regulator D3, 5V is reduced to 3.3V to power the main control chip processor STM32G070CBT6.

[0021] In this embodiment, the battery assembly includes an intrinsically safe battery and an intrinsically safe power supply circuit. The intrinsically safe battery adopts a wireless power supply method. The intrinsically safe power supply circuit adopts a three-level electronic protection circuit and a primary resistor current limiting circuit. The three-level electronic protection circuit is composed of an overvoltage circuit and an overcurrent circuit. Specifically: like Figure 3As shown, the first-level electronic protection circuit includes a voltage detection chip N1, an overcurrent detection chip U1, a switch tube Q1, a step-down voltage regulator tube D2, a current sampling resistor R17, a level conversion transistor P4, a self-locking transistor P1, a unlocking MOS tube PM2, a resistor driving transistor N2, a voltage dividing resistor R11, a voltage dividing resistor R12, a bypass resistor R14, a leakage resistor R15, an oscillation suppression capacitor C4, an ESD protection resistor R16, a gate resistor R22, a gate voltage regulator tube D3, a delay capacitor C1 and a driving resistor R23. The positive pole of the 5V power supply is connected to the bypass resistor R14, the other end of the bypass resistor R14 is connected to the cathode of the voltage detection chip N1, and the anode of the voltage detection chip N1 is connected to the negative pole of the 5V power supply. The No. 1 voltage-dividing resistor R11 and the No. 2 voltage-dividing resistor R12 are connected in series, connected to the positive and negative electrodes of the 5V power supply, and the center point is connected to the reference end of the No. 1 voltage detection chip N1. The emitter of the No. 1 level conversion transistor P4 is connected to the positive electrode of the 5V power supply, the base of the No. 1 level conversion transistor P4 is connected to the cathode of the No. 1 voltage detection chip N1 through a resistor, and the collector of the No. 1 level conversion transistor P4 is connected to the current sampling end of the No. 1 overcurrent detection chip U1 through a No. 1 resistor R18. The cathode of the No. 1 buck regulator D2 is connected to the positive electrode of the 5V power supply, and the anode of the No. 1 buck regulator D2 is connected to the No. 1 leakage resistor R15 and the No. 1 ESD protection resistor R16. The other end of the No. 1 leakage resistor R15 is connected to the negative electrode of the 5V power supply. The other end of the No. 1 ESD protection resistor R16 is connected to the VDD of the No. 1 overcurrent detection chip U1. The No. 1 oscillation suppression capacitor C4 is connected to the VDD and VSS of the No. 1 overcurrent detection chip U1. The VSS of the No. 1 overcurrent detection chip U1 is connected to the negative electrode of the 5V power supply, the No. 1 current sampling resistor R17 is connected to the negative electrode of the 5V power supply, the other end of the No. 1 current sampling resistor R17 is connected to the negative electrode of the first-level protection output, and at the same time is connected to the sampling end of the No. 1 overcurrent detection chip U1 through a resistor. The output pin of the No. 1 overcurrent detection chip U1 drives the transistor N2 through a No. 1 resistor, and the collector of the No. 1 resistor-driven transistor N2 is connected to the gate of the No. 1 switch tube Q1 through a resistor. The source of the No. 1 switch tube Q1 is connected to the positive electrode of the 5V power supply, and the drain of the No. 1 switch tube Q1 is connected to the positive electrode of the first-level protection output. The No. 1 gate resistor R22 and the No. 1 gate voltage regulator D3 are connected in parallel to the source and gate of the No. 1 switch tube Q1. The emitter of the No. 1 self-locking transistor P1 is connected to the source of the No. 1 switch tube Q1, the collector of the No. 1 self-locking transistor P1 is connected to the gate of the No. 1 switch tube Q1, and the base of the No. 1 self-locking transistor P1 is connected to the source of the No. 1 unlocking MOSFET PM2 through the No. 3 driving resistor R2. The drain of the No. 1 unlocking MOSFET PM2 is connected to the drain of the No. 1 switch tube Q1. The No. 1 delay capacitor C1 is connected between the source and gate of the No. 1 unlocking MOSFET PM2. The positive and negative outputs of the first-stage electronic protection circuit constitute the positive and negative poles of the 5V power supply of the second-stage electronic protection circuit.

[0022] like Figure 4As shown, the second-level electronic protection circuit includes a No. 2 voltage detection chip N3, a No. 2 overcurrent detection chip U2, a No. 2 switch tube Q2, a No. 2 step-down voltage regulator tube D5, a No. 2 current sampling resistor R31, a No. 2 level conversion transistor P5, a No. 2 self-locking transistor P2, a No. 2 unlocking MOS tube PM3, a No. 2 resistor driving transistor N4, a No. 3 voltage dividing resistor R25, a No. 4 voltage dividing resistor R25, a No. 2 bypass resistor R28, a No. 2 leakage resistor R29, a No. 2 oscillation suppression capacitor C5, a No. 2 ESD protection resistor R30, a No. 2 gate resistor R36, a No. 2 gate voltage regulator tube D6, a No. 2 delay capacitor C2 and a No. 2 driving resistor R5. The positive pole of the 5V power supply is connected to the No. 2 bypass resistor R28, the other end of the No. 2 bypass resistor R28 is connected to the cathode of the No. 2 voltage detection chip N3, and the anode of the No. 2 voltage detection chip N3 is connected to the negative pole of the 5V power supply. The third voltage-dividing resistor R25 and the fourth voltage-dividing resistor R25 are connected in series, connected to the positive and negative electrodes of the 5V power supply, and the center point is connected to the reference end of the second voltage detection chip N3. The emitter of the second level conversion transistor P5 is connected to the positive electrode of the 5V power supply, the base of the second level conversion transistor P5 is connected to the cathode of the second voltage detection chip N3 through a resistor, and the collector of the second level conversion transistor P5 is connected to the current sampling end of the second overcurrent detection chip U2 through the second resistor R32. The cathode of the second buck regulator D5 is connected to the positive electrode of the 5V power supply, and the anode of the second buck regulator D5 is connected to the second leakage resistor R29 and the second ESD protection resistor R30. The other end of the second leakage resistor R29 is connected to the negative electrode of the 5V power supply. The other end of the second ESD protection resistor R30 is connected to the VDD of the second overcurrent detection chip U2. The second oscillation suppression capacitor C5 is connected to the VDD and VSS of the second overcurrent detection chip U2. The VSS of the No. 2 overcurrent detection chip U2 is connected to the negative electrode of the 5V power supply, the No. 2 current sampling resistor R31 is connected to the negative electrode of the 5V power supply, the other end of the No. 2 current sampling resistor R31 is connected to the negative electrode of the first-level protection output, and at the same time is connected to the sampling end of the No. 2 overcurrent detection chip U2 through a resistor. The output pin of the No. 2 overcurrent detection chip U2 drives the transistor N4 through a No. 2 resistor, and the collector of the No. 2 resistor-driven transistor N4 is connected to the gate of the No. 2 switch tube Q2 through a resistor. The source of the No. 2 switch tube Q2 is connected to the positive electrode of the 5V power supply, and the drain of the No. 2 switch tube Q2 is connected to the positive electrode of the first-level protection output. The No. 2 gate resistor R36 and the No. 2 gate voltage regulator D6 are connected in parallel to the source and gate of the No. 2 switch tube Q2. The emitter of the second self-locking transistor P2 is connected to the source of the second switch tube Q2, the collector of the second self-locking transistor P2 is connected to the gate of the second switch tube Q2, and the base of the second self-locking transistor P2 is connected to the source of the second unlocking MOSFET PM3 through the second driving resistor R5. The drain of the second unlocking MOSFET PM3 is connected to the drain of the second switch tube Q2. The second delay capacitor C2 is connected between the source and gate of the second unlocking MOSFET PM3. The positive and negative outputs of the second-level electronic protection circuit constitute the positive and negative electrodes of the 5V power supply of the third-level electronic protection circuit.

[0023] like Figure 5 As shown, the third-level electronic protection circuit includes a No. 3 voltage detection chip N5, a No. 3 overcurrent detection chip U3, a No. 3 switch tube Q3, a No. 3 step-down voltage regulator tube D93, a No. 3 current sampling resistor R53, a No. 3 level conversion transistor P6, a No. 3 self-locking transistor P3, a No. 3 unlocking MOS tube PM4, a No. 3 resistor driving transistor N6, a No. 5 voltage dividing resistor R44, a No. 6 voltage dividing resistor R45, a No. 3 bypass resistor R50, a No. 3 leakage resistor R51, a No. 3 oscillation suppression capacitor C6, a No. 3 ESD protection resistor R52, a No. 3 gate resistor R58, a No. 3 gate voltage regulator tube D10, a No. 3 delay capacitor C3 and a No. 3 driving resistor R57. The positive pole of the 5V power supply is connected to the No. 3 bypass resistor R50, the other end of the No. 3 bypass resistor R50 is connected to the cathode of the No. 3 voltage detection chip N5, and the anode of the No. 3 voltage detection chip N5 is connected to the negative pole of the 5V power supply. The No. 5 voltage-dividing resistor R44 and the No. 6 voltage-dividing resistor R45 are connected in series, connected to the positive and negative electrodes of the 5V power supply, and the center point is connected to the reference end of the No. 3 voltage detection chip N5. The emitter of the No. 3 level conversion transistor P6 is connected to the positive electrode of the 5V power supply, the base of the No. 3 level conversion transistor P6 is connected to the cathode of the No. 3 voltage detection chip N5 through a resistor, and the collector of the No. 3 level conversion transistor P6 is connected to the current sampling end of the No. 3 overcurrent detection chip U3 through the No. 3 resistor R54. The cathode of the No. 3 buck regulator D93 is connected to the positive electrode of the 5V power supply, and the anode of the No. 3 buck regulator D93 is connected to the No. 3 leakage resistor R51 and the No. 3 ESD protection resistor R52. The other end of the No. 3 leakage resistor R51 is connected to the negative electrode of the 5V power supply. The other end of the No. 3 ESD protection resistor R52 is connected to the VDD of the No. 3 overcurrent detection chip U3. The No. 3 oscillation suppression capacitor C6 is connected to the VDD and VSS of the No. 3 overcurrent detection chip U3. The VSS of the No. 3 overcurrent detection chip U3 is connected to the negative electrode of the 5V power supply, the No. 3 current sampling resistor R53 is connected to the negative electrode of the 5V power supply, and the other end of the No. 3 resistor R54 is connected to the output negative electrode of the first-level electronic protection circuit, and is connected to the sampling end of the No. 3 overcurrent detection chip U3 through a resistor. The output pin of the No. 3 overcurrent detection chip U3 drives the transistor N6 through a No. 3 resistor, and the collector of the No. 3 resistor-driven transistor N6 is connected to the gate of the No. 3 switch tube Q3 through a resistor. The source of the No. 3 switch tube Q3 is connected to the positive electrode of the 5V power supply, and the drain of the No. 3 switch tube Q3 is connected to the positive electrode of the first-level protection output. The No. 3 gate resistor R58 and the No. 3 gate voltage regulator D10 are connected in parallel to the source and gate of the No. 3 switch tube Q3. The emitter of the No. 3 self-locking transistor P3 is connected to the source of the No. 3 switch tube Q3, the collector of the No. 3 self-locking transistor P3 is connected to the gate of the No. 3 switch tube Q3, and the base of the No. 3 self-locking transistor P3 is connected to the source of the No. 3 unlocking MOSFET PM4 through the No. 4 resistor R8. The drain of the No. 3 unlocking MOSFET PM4 is connected to the drain of the No. 3 switch tube Q3. The No. 3 delay capacitor C3 is connected between the source and gate of the No. 3 unlocking MOSFET PM4.

[0024] like Figure 7 As shown, the electronic ink screen is designed with a boost protection circuit, which includes a unidirectional thyristor Q1, a voltage stabilizing diode VD6, a 0.1UF capacitor C17, a 1K resistor RT2 and a 10K resistor R4. The boost outputs VGH and VHL in the screen are connected to the cathode K of the unidirectional thyristor Q1, the first end of the 0.1UF capacitor C17 and the 1K resistor RT2, the gate G of the unidirectional thyristor Q1 is connected to the first end of the 10K resistor R4, the second end of the 0.1UF capacitor C17 and the 1K resistor RT2 is connected to the second end of the 10K resistor R4, and is connected to the anode of the voltage stabilizing diode VD6, and the cathode of the voltage stabilizing diode VD6 is grounded. The voltage of VGH and VHL is limited to within ±16V, and the current is 200ma.

[0025] When this specific implementation is used, Figure 6 As shown, after the content to be edited is completed on the peripheral intrinsically safe mobile phone or tablet, the data is sent down, and the main control chip processor STM32G070CBT6 processes the data information and outputs it through the signal end. Using SPI control, the clock and data signals are connected to the 24PIN header end at the X1 position through the FPC line and sent to the driver module; when the driver module receives the data information and the clock signal, it will process the data information and the clock signal respectively, convert the data information into information that can be recognized by the screen, and adjust the cycle of the driving clock signal at the same time, and send the adjusted clock signal to each electronic price tag. The electronic price tag automatically responds and recognizes the corresponding data in the order defined by the serial port. The entire data transmission works automatically, and no manual operation is required in the middle.

[0026] In order to further reduce costs, the fixed content in the overall display content of a modular electronic ink screen of the present invention is completed by traditional printing technology, and the content that needs to be changed in time is completed by electronic technology.

[0027] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A modular electronic ink screen, characterized in that: It is composed of several electronic price tags, which are linked and can realize the overall display function, including: A plurality of electronic price tags are spliced ​​into an integral screen through a metal middle frame, a protective panel is installed on the upper surface of the screen, and a back cover is installed on the lower surface; The main control chip processor STM32G070CBT6 is connected to each electronic price tag through a driver module, plus multiple screen controllers, with a built-in Bluetooth module that supports Bluetooth protocol 5.0 and below, and is paired with an external intrinsically safe mobile phone or tablet. After pairing is completed, the main control chip processor STM32G070CBT6 and the external intrinsically safe mobile phone or tablet are connected to achieve communication; The battery assembly is used to supply power to the main control chip processor STM32G070CBT6 according to the instructions received by the NFC antenna.

2. A modular electronic ink screen as claimed in claim 1, characterized in that: Through the NFC function of the peripheral intrinsically safe mobile phone or tablet, close to the NFC antenna, the chip on the main control board is lit up and the clock signal is sent to the main control chip processor STM32G070CBT6. Through the Ι²C communication protocol, the optocoupler (D2) sends a signal to the power control board. The battery assembly starts to supply the main control board with a power supply voltage of 5V. Through the linear regulator (D3), the 5V is reduced to 3.3V to power the main control chip processor STM32G070CBT6.

3. The modular electronic ink screen according to claim 1, characterized in that: The battery assembly comprises an intrinsically safe storage battery and an intrinsically safe power supply circuit, and the intrinsically safe storage battery adopts a wireless power supply mode.

4. A modular electronic ink screen as claimed in claim 3, characterized in that: The power supply intrinsic safety circuit adopts a three-level electronic protection circuit and a first-level resistor current limiting circuit. The three-level electronic protection circuit is composed of an overvoltage circuit and an overcurrent circuit. The positive and negative outputs of the first-level electronic protection circuit constitute the positive and negative poles of the 5V power supply of the second-level electronic protection circuit, and the positive and negative outputs of the second-level electronic protection circuit constitute the positive and negative poles of the 5V power supply of the third-level electronic protection circuit.

5. The modular electronic ink screen according to claim 1, characterized in that: After the content to be edited is completed on the peripheral intrinsically safe mobile phone or tablet, the data is sent down, and the main control chip processor STM32G070CBT6 processes the data information and outputs the signal. Using SPI control, the clock and data signals are sent to the driver module through the FPC line connecting the 24PIN header at the X1 position; When the driver module receives the data information and the clock signal, it will process the data information and the clock signal respectively, convert the data information into information that can be recognized by the screen, adjust the cycle of the driving clock signal, and send the adjusted clock signal to each electronic price tag. Each electronic price tag automatically responds and recognizes the corresponding data in the order defined by the serial port.

6. The modular electronic ink screen according to claim 1, characterized in that: The driving module is provided with a boost short-circuit protection circuit, which includes a unidirectional thyristor (Q1), a voltage-stabilizing diode (VD6), a 0.1UF capacitor (C17), a 1K resistor (RT2) and a 10K resistor (R4). The boost outputs VGH and VHL in the screen are connected to the cathode (K) of the unidirectional thyristor (Q1), the first ends of the 0.1UF capacitor (C17) and the 1K resistor (RT2), the gate (G) of the unidirectional thyristor (Q1) is connected to the first end of the 10K resistor (R4), the second ends of the 0.1UF capacitor (C17) and the 1K resistor (RT2) are connected to the second end of the 10K resistor (R4), and are connected together with the anode of the voltage-stabilizing diode (VD6), and the cathode of the voltage-stabilizing diode (VD6) is grounded.

7. The modular electronic ink screen according to claim 1, characterized in that: The fixed content in the overall display is completed using traditional printing technology, while the content that needs to be changed in a timely manner is completed using electronic technology.

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