Self-driven electronic price tag system based on radio frequency energy and control method thereof

Abstract

The invention discloses a self-driven electronic price tag system based on radio frequency energy and a control method thereof, and aims to solve the problems that the cost is increased due to the fact that an existing electronic price tag system is powered by a battery, and environmental pollution is easily caused due to improper battery charge loss. According to the invention, an electronic price tag system composed of a handheld energy-information integrated transmitter, a self-driven electronic price tag and system-matched upper computer software is constructed, and batch updating and point-to-point updating of the self-driven electronic price tag can be rapidly completed; energy is supplied to the self-driven electronic price tag in the form of radio frequency energy through the handheld energy-information integrated transmitter, the self-driven electronic price tag is awakened in a dormancy mode, energy is optimally utilized, the self-driven electronic price tag does not need to be charged or a battery does not need to be additionally placed, use of a charging wire and the battery is greatly reduced, and environmental pollution and movement cost are reduced. The invention belongs to the technical field of wireless sensing.

Description

Technical Field

[0001] The present invention relates to an electronic price tag system and a control method, and in particular to a self-driven electronic price tag system based on radio frequency energy and a control method thereof. The present invention belongs to the field of wireless sensor technology. Background Art

[0002] Radio frequency energy is a kind of electromagnetic wave energy. The radio frequency energy in the environment is mainly emitted by TV base stations, mobile signal base stations, and mail machines. These radio frequency energies provide a wireless transmission path for signals, and are also a way of energy transmission. If radio frequency energy can be used for energy supply, the use of consumables such as charging cables and batteries can be reduced, which is of great value to energy conservation and emission reduction.

[0003] With the development of smart retail, electronic price tag systems (ESLS) have gradually replaced traditional paper price tags, with the advantages of flexible price modification and real-time information update. However, most existing electronic price tags rely on batteries, which need to be replaced regularly, increasing operating costs, and improper disposal will pollute the environment, which is not in line with the concept of green and sustainable development. Summary of the invention

[0004] The present invention aims to solve the problem that the existing electronic price tag system uses battery power supply, which increases the cost and improper battery charging and discharging easily causes environmental pollution, and further proposes a self-driven electronic price tag system based on radio frequency energy and a control method thereof.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] The present invention comprises a handheld energy-communication integrated transmitter, a self-driven electronic price tag and a host computer software;

[0007] The handheld integrated energy and communication transmitter is used for radio frequency energy transmission and data transmission, and can transmit radio frequency energy of a specific band to drive the electronic price tag to work, and send commodity display information to the electronic price tag;

[0008] The self-driven electronic price tag is used to receive electromagnetic wave energy and commodity data information emitted by the transmitter, and display the commodity price interface through the ink screen;

[0009] The host computer software is used to edit the address information and display content of the price tag, and burn the product information into the transmitter through the data connection line.

[0010] Furthermore, the handheld integrated energy and communication transmitter includes a lithium battery, a power management circuit, a charging interface, a power indicator light, a power button switch, a radio frequency signal switch, a first microcontroller, first to fourth indicator lights, an SD card, a USB interface, a first communication chip, a first communication antenna, an LCD, a power switch, a radio frequency signal source, a power amplifier, and an energy transmitting antenna.

[0011] Furthermore, the self-driven electronic price tag includes a second communication chip, a second communication antenna, a second microcontroller, an ink screen, an energy collection antenna, a rectifier and matching, and an energy management circuit.

[0012] Furthermore, the host computer software includes but is not limited to the following functions: price tag display, inserting pictures, text, shapes, templates, QR codes, barcodes and other information, modifying color, font, font size, burning, equipment detection, price tag information query, batch import of price tag information, and batch burning.

[0013] A control method for a self-driven electronic price tag system based on radio frequency energy comprises the following steps:

[0014] Step 1: The host computer software imports the price tag information list by combining database import and custom editing, and connects the handheld integrated transmitter through the USB interface to burn the update information;

[0015] Step 2: The first microcontroller stores the update information in the SD card, the No. 1 indicator light displays the information interaction status between the handheld integrated transmitter and the host computer software in real time, and the LCD screen displays the burning status;

[0016] Step 3: The handheld integrated energy and communication transmitter is set to a mobile working state by the host computer, the power button switch is turned on, the RF signal switch is turned on so that the first microcontroller controls the power switch to turn on, the RF signal source enhances the RF signal through the power amplifier, and transmits RF energy through the energy transmitting antenna. The No. 3 indicator light indicates the power-on state of the handheld integrated energy and communication transmitter, and the No. 4 indicator light indicates the power-on state of the RF signal source, that is, the power switch is turned on;

[0017] Step 4: The energy receiving antenna of the self-driven electronic price tag receives energy, wakes up the self-driven electronic price tag through rectification matching and energy management circuit, and waits for the second communication chip to receive the address information reading request;

[0018] Step 5: The first microcontroller controls the first communication chip to send an address information reading request to the self-driving electronic price tag through the first communication antenna, the second communication chip returns information to the second microcontroller, and the second microcontroller returns the local address information;

[0019] Step 6: The handheld integrated transmitter matches the update information corresponding to the address of the self-driving electronic price tag in the local database and sends it to the self-driving electronic price tag;

[0020] Step 7: After the self-driven electronic price tag receives the information, the second microcontroller determines the update information content according to the command code Update_Flag.

[0021] Step 8: The handheld integrated transmitter is aimed at the self-driving electronic price tags to be updated one by one, and steps S3 to S7 are repeated continuously to update the price tag information.

[0022] Furthermore, in step three, only when the radio frequency signal switch is pressed, the first microcontroller controls the power switch to turn on.

[0023] Furthermore, in step five, the first microcontroller of the handheld integrated transmitter sends an address read request to the self-driving electronic price tag through the first communication chip. At this time, the self-driving electronic price tag is in a waiting state for price tag information update and will return the local address in the FLASH of the second microcontroller.

[0024] Furthermore, in step 7, the update information command code Update_Flag is checked. If Update_Flag=00, the second microcontroller directly enters the sleep mode; if Update_Flag=01, the price tag information is updated; if Update_Flag=10, the price tag address is updated; if Update_Flag=11, the price tag address and the price tag information are updated at the same time. After completing the corresponding responses of Update_Flag=01, 10, and 11, the second microcontroller returns the update success information, enters the sleep mode, the LCD screen displays the update success, and the No. 2 indicator light is on to indicate the update success.

[0025] Furthermore, in step eight, after the information update is completed, the self-driving electronic price tag enters a sleep mode.

[0026] The beneficial effects of the present invention are:

[0027] 1. The present invention uses a handheld integrated transmitter to drive a self-driving electronic price tag and a control method thereof, constructs an electronic price tag system consisting of a handheld integrated transmitter, a self-driving electronic price tag and a system-matching host computer software, and can quickly complete batch updates and point-to-point updates of self-driving electronic price tags.

[0028] 2. The present invention uses a handheld integrated energy and communication transmitter to supply energy to the self-driven electronic price tag in the form of radio frequency energy, as well as the dormancy and awakening of the self-driven electronic price tag, thereby achieving optimal energy utilization. The self-driven electronic price tag does not require charging or additional placement of batteries, which greatly reduces the use of charging cables and batteries, and reduces environmental pollution and movement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the overall structural diagram of the present invention;

[0030] Figure 2 It is a schematic diagram of the workflow of the host computer software of the present invention;

[0031] Figure 3 It is a schematic diagram of the working process of the handheld energy-communication integrated transmitter of the present invention;

[0032] Figure 4 It is a schematic diagram of the working process of the self-driven electronic price tag of the present invention. DETAILED DESCRIPTION

[0033] Implementation method 1: A self-driving electronic price tag system based on radio frequency energy described in this implementation method includes a handheld integrated energy and communication transmitter, a self-driving electronic price tag and a host computer software;

[0034] The handheld integrated energy and communication transmitter is used for radio frequency energy transmission and data transmission, and can transmit radio frequency energy of a specific band to drive the electronic price tag to work, and send commodity display information to the electronic price tag;

[0035] The self-driven electronic price tag is used to receive electromagnetic wave energy and product data information emitted by the transmitter, and display the product price interface through the ink screen. Since the ink screen does not consume power when in standby mode, the display can be maintained for a long time. The energy source of the electronic price tag is only the handheld integrated transmitter, and there is no battery inside, so as to reduce maintenance costs and environmental pollution.

[0036] The host computer software is used to edit the address information and display content of the price tag, connect to the handheld integrated transmitter through the USB interface, and write the edited price tag information into the SD card of the transmitter.

[0037] like Figure 1 As shown, the solid line indicates energy flow, and the dotted line indicates signal transmission. The lithium battery supplies power to the handheld integrated transmitter through the power management circuit. The power button switch controls the on and off of the power. The No. 3 indicator light indicates the on and off status of the handheld integrated transmitter. The power management circuit is connected to the charging interface, and the lithium battery can be charged through an external power supply. The power indicator light indicates the charging status during charging. When the lithium battery is low on power, the power indicator light indicates the low power status.

[0038] Figure 1In the figure, the first microcontroller is the control core of the handheld integrated energy and information transmitter, and the No. 1 indicator light and LCD indicate the information interaction status between the handheld integrated energy and information transmitter and the upper computer software. The RF signal switch controls the start and stop of the RF signal source through the first microcontroller connected to the power switch, and the No. 4 indicator light indicates the start and stop of the RF signal source. The RF signal generated by the RF signal source is amplified by the power amplifier and sent through the energy transmitting antenna. The first communication chip is connected to the first microcontroller and is used to send a communication signal to the electronic price tag. The self-driving electronic price tag receives RF energy through the energy receiving antenna, and converts the energy into stable electrical energy through rectification matching and energy management circuit to supply the second microcontroller and the second communication chip. The second communication chip is connected to the second microcontroller to receive and send communication signals. The second microcontroller controls the update of the display content of the ink screen, and the No. 2 indicator light and LCD indicate the information interaction status between the handheld integrated energy and information transmitter and the self-driving electronic price tag.

[0039] like Figure 2 As shown, the host computer software includes but is not limited to the following functions: price tag display, inserting pictures, text, shapes, templates, QR codes, barcodes and other information, modifying color, font, font size, burning, device detection, price tag information query, price tag information batch import, batch burning.

[0040] The host computer software can connect to the price tag information database, which contains edited update information, which can be directly imported into the self-driving electronic price tag through the host computer. Custom modifications can also be made according to actual conditions through the editing function provided by the host computer software.

[0041] When the host computer is connected to the handheld energy-communication integrated transmitter via a USB interface, power can be supplied to the handheld energy-communication integrated transmitter via the USB interface.

[0042] The workflow of the host computer software is as follows: the host computer software is connected to the database, obtains the update information list from the database, and performs custom editing in the host computer software. The host computer software is connected to the handheld integrated transmitter via the USB interface, sets its working mode, stores the update information in its SD card, and the No. 1 indicator light indicates the information interaction status. When set to mobile working mode, the process ends. When set to fixed working mode, wait for the handheld integrated transmitter to return the update success information of the self-driven electronic price tag to the host computer. After receiving the update success information, inform the batch burning machine to transmit once and wait for the transmission completion information. After receiving the transmission completion information, inform the handheld integrated transmitter to start the second update.

[0043] like Figure 3As shown, the handheld integrated energy and communication transmitter includes a lithium battery, a power management circuit, a charging interface, a power indicator light, a power button switch, a radio frequency signal switch, a first microcontroller, the first to fourth indicator lights, an SD card, a USB interface, a first communication chip, a first communication antenna, an LCD, a power switch, a radio frequency signal source, a power amplifier, and an energy transmitting antenna.

[0044] When the power button switch is pressed, the lithium battery and the power management circuit power the handheld integrated transmitter, and the microcontroller 1 starts to work. The first microcontroller is connected to indicator lights 1, 2, 3, and 4, and indicator lights 1, 2, 3, and 4 indicate the working status of the handheld integrated transmitter. Indicator light No. 1 indicates the information interaction status between the handheld integrated transmitter and the host computer software, indicator light No. 2 indicates the information interaction status between the handheld integrated transmitter and the self-driven electronic price tag, indicator light No. 3 indicates the on and off status of the handheld integrated transmitter, and indicator light No. 4 indicates the switch status of the RF signal source. The first microcontroller is connected to the SD card, and the SD card stores the information sent by the host computer. The first microcontroller is connected to the USB interface, connected to the host computer and interacts with information. The first microcontroller is connected to the first communication chip, and the first communication chip is connected to the first communication antenna to interact with the self-driven electronic price tag. The first microcontroller is connected to the LCD, and the LCD displays the host computer burning status information and the price tag information update status information. The power switch is connected to the RF signal source, and the RF signal switch is connected to the first microcontroller. When pressed, the first microcontroller controls the power switch to turn on. The RF signal source is connected to the power amplifier, which amplifies the RF signal. The RF signal transmits the RF energy to the self-driven electronic price tag through the energy transmitting antenna to provide energy for the self-driven electronic price tag. The power management circuit is connected to the charging interface, and the lithium battery can be charged through an external charging cable. The power indicator light indicates the charging status during charging. When the lithium battery is low on power, the power indicator light indicates the low power status.

[0045] The handheld integrated transmitter has two working states, a fixed working state and a mobile working state, and the two states are set by the host computer. When it is in a fixed working state, it will not send an address read request, and directly send update information to the self-driving electronic price tag. The handheld integrated transmitter is connected to the host computer through a USB interface. When it is in a mobile working state, it will send an address read request and match its update information according to the address of the self-driving electronic price tag.

[0046] The working process of the handheld integrated transmitter is as follows: turn on the power button switch, the handheld integrated transmitter is powered on, the No. 3 indicator light indicates the power-on status, and the power indicator light indicates the battery power. The handheld integrated transmitter is connected to the host computer software through the USB interface, and the edited price tag information is burned into the SD card. During this period, the No. 1 indicator light and LCD indicate the burning progress. Turn on the RF signal switch, control the first microcontroller to turn on the power switch, the RF signal source and the power amplifier start to transmit RF energy, and the No. 4 indicator light indicates the RF signal transmission status. According to the pre-setting of the host computer software, determine whether the current state is a fixed working state or a mobile working state. If it is a fixed working state, the update information is burned in the SD card sequence, and the update success information is waited. After receiving the update success information, the No. 2 indicator light and LCD indicate that the update is successful, and then the update success information is returned to the host computer, waiting for the next burn notification. When the next burn notification is received, the next burn is started. If it is a mobile working state, send an address read request. After receiving the price tag address, compare the address in the SD card, send the corresponding update information, and wait for the update success information. After receiving the update success information, the No. 2 indicator light and the LCD indicate that the update is successful.

[0047] like Figure 4 As shown, the self-driven electronic price tag includes components such as a second communication chip, a second communication antenna, a second microcontroller, an ink screen, an energy collection antenna, a rectifier matching, and an energy management circuit.

[0048] The self-driving electronic price tag receives information transmitted by the first communication antenna of the handheld integrated energy and communication transmitter through the second communication antenna. The first communication antenna is connected to the second communication chip, and the second communication chip is connected to the second microcontroller. The information is processed by the second microcontroller and sent to the ink screen connected to the second microcontroller, and the price tag information is displayed on the ink screen. The energy receiving antenna receives the radio frequency energy emitted by the energy transmitting antenna of the handheld integrated energy and communication transmitter. The radio frequency energy is rectified, matched and energy-managed to power other devices in the self-driving electronic price tag.

[0049] The working process of the self-driven electronic price tag is as follows: the energy receiving antenna collects RF energy and powers the self-driven electronic price tag through rectification matching and energy management circuits. After the price tag wakes up, the second microcontroller starts to confirm whether the local address can be detected in the local FLASH sector. If the local address is detected, enter the price tag information update waiting state and wait for the address read request. After receiving the address read request, send the local address and wait for the update information to be burned. After receiving the update information, update the corresponding information according to the command code Update_Flag. After the update is completed, return the update success information, enter the sleep mode, and the ink screen remains displayed. If the local address cannot be detected, enter the address burning waiting state and wait for the update information to be burned. After receiving the update information, the command code Update_Flag is fixed to 11, and the information is updated according to the command. After the update is completed, return the update success information, enter the sleep mode, and the ink screen remains displayed.

[0050] Preferably, the host computer software can be connected to the batch burning machine and the handheld integrated transmitter at the same time, and the handheld integrated transmitter is placed vertically above the batch burning machine, that is, in a fixed working state. The self-driving electronic price tag is placed on the conveyor belt surface of the batch burning machine in the form of an assembly line. At this time, there is no address information in the FLASH of the self-driving electronic price tag, and all are in the address burning waiting state. When the self-driving electronic price tag successfully burns the address, it returns the burning success information to the handheld integrated transmitter, and the No. 2 indicator light indicates that the burning is successful. The handheld integrated transmitter then returns this information to the host computer software, and the host computer software instructs the batch burning machine to perform a price tag transmission. After the transmission is completed, it notifies the host computer, and then the host computer notifies the handheld integrated transmitter to start the next burning. By analogy, the address burning of all self-driving electronic price tags is completed.

[0051] Preferably, the update information burned into the handheld integrated transmitter by the host computer includes: command code Update_Flag, update address information, price tag information. When Update_Flag = 00, the update address information and price tag information are empty; when Update_Flag = 01, the update address information is empty, and the price tag information is not empty; when Update_Flag = 10, the update address information is not empty, and the price tag information is empty; when Update_Flag = 11, the update address information and price tag information are not empty.

[0052] Preferably, when the self-driven electronic price tag is in the address burning waiting state on the batch burning machine, the address burning information sent by the handheld integrated transmitter is the update information of the command code Update_Flag=11 as described in claim 6, that is, the update address information is not empty and the price tag information is not empty. If so, the first price tag information entry can be completed while burning the price tag address, greatly improving efficiency. At this time, the update information is burned in sequence according to the information order in the SD card of the finger integrated transmitter.

[0053] Embodiment 2: The control method of a self-driven electronic price tag system based on radio frequency energy described in this embodiment includes the following steps:

[0054] S1: The host computer software imports the price tag information list by combining database import with custom editing, and connects the handheld integrated transmitter through the USB interface to burn and update the information.

[0055] S2: The first microcontroller stores the update information in the SD card, the No. 1 indicator light displays the information interaction status between the handheld integrated transmitter and the host computer software in real time, and the LCD screen displays the burning status.

[0056] S3: The finger energy integrated transmitter is set to mobile working state by the host computer, the power button is turned on, the RF signal switch is turned on so that the first microcontroller controls the power switch to turn on, the RF signal source enhances the RF signal through the power amplifier, and transmits RF energy through the energy transmitting antenna. The No. 3 indicator light indicates the power-on state of the handheld energy integrated transmitter, and the No. 4 indicator light 4 indicates the power-on state of the RF signal source, that is, the power switch is turned on.

[0057] It can be seen from S3 that only when the RF signal switch is pressed, the first microcontroller will control the power switch to open, that is, when the host computer software burns update information to the handheld energy-communication integrated transmitter, the RF signal source path is turned off to save energy.

[0058] S4: The energy receiving antenna of the self-driven electronic price tag receives energy, wakes up the self-driven electronic price tag through rectification matching and energy management circuit, and waits for the second communication chip to receive the address information reading request.

[0059] S5: The first microcontroller controls the first communication chip to send an address information reading request to the self-driving electronic price tag through the first communication antenna, the second communication chip returns information to the second microcontroller, and the second microcontroller returns the local address information.

[0060] It can be seen from S5 that the first microcontroller of the handheld integrated transmitter sends an address read request to the self-driving electronic price tag through the first communication chip. At this time, the self-driving electronic price tag is in a waiting state for price tag information update and will return the local address in the FLASH of the second microcontroller.

[0061] S6: The handheld integrated transmitter matches the update information corresponding to the address of the self-driving electronic price tag in the local database and sends it to the self-driving electronic price tag.

[0062] S7: After receiving the information, the self-driving electronic price tag checks the update information command code Update_Flag. If Update_Flag=00, the second microcontroller directly enters the sleep mode; if Update_Flag=01, the price tag information is updated; if Update_Flag=10, the price tag address is updated; if Update_Flag=11, the price tag address and price tag information are updated at the same time. After completing the corresponding responses of Update_Flag=01, 10, and 11, the second microcontroller returns the update success information and enters the sleep mode. The LCD screen displays the update success, and the No. 2 indicator light is on to indicate the update success.

[0063] It can be seen from S7 that after the self-driving electronic price tag receives the update information, the second microcontroller determines the content of the update information according to the command code Update_Flag. The command code can reduce the power consumption and information volume of each update, and it is not necessary to refresh the ink screen every time the self-driving electronic price tag is awakened, and it avoids false awakening and reduces power consumption.

[0064] S8: The handheld integrated transmitter is aimed at the self-driving electronic price tags to be updated one by one, and steps S3 to S7 are repeated continuously to update the price tag information.

[0065] As can be seen from S8, after the information is updated, the self-driven electronic price tag enters sleep mode to save energy. The ink screen feature ensures that the display content can be maintained even when the power is off, ensuring that the price tag information is displayed for a long time.

[0066] The first microcontroller appearing in the above text corresponds to the microcontroller 1 in the accompanying drawing; the second microcontroller corresponds to the microcontroller 2 in the accompanying drawing; the first communication chip 1 corresponds to the communication chip 1 in the accompanying drawing; the second communication chip corresponds to the communication chip 2 in the accompanying drawing; indicator lights 1-4 correspond to indicator lights 1, 2, 3, 4 in the drawing; the first communication antenna corresponds to the communication antenna 1 in the accompanying drawing; the second communication antenna corresponds to the communication antenna 2 in the accompanying drawing.

[0067] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement made to the above embodiments without departing from the content of the technical solution of the present invention, based on the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A self-driven electronic price tag system based on radio frequency energy, characterized in that: The system comprises a handheld integrated transmitter, a self-driven electronic price tag and a host computer software; The handheld integrated energy and communication transmitter is used for radio frequency energy transmission and data transmission, and can transmit radio frequency energy of a specific band to drive the electronic price tag to work, and send commodity display information to the electronic price tag; The self-driven electronic price tag is used to receive electromagnetic wave energy and commodity data information emitted by the transmitter, and display the commodity price interface through the ink screen; The host computer software is used to edit the address information and display content of the price tag, and burn the product information into the transmitter through the data connection line.

2. The self-driven electronic price tag system based on radio frequency energy according to claim 1, characterized in that: The handheld integrated energy and communication transmitter includes a lithium battery, a power management circuit, a charging interface, a power indicator light, a power button switch, a radio frequency signal switch, a first microcontroller, first to fourth indicator lights, an SD card, a USB interface, a first communication chip, a first communication antenna, an LCD, a power switch, a radio frequency signal source, a power amplifier, and an energy transmitting antenna.

3. The self-driven electronic price tag system based on radio frequency energy according to claim 1, characterized in that: The self-driven electronic price tag includes a second communication chip, a second communication antenna, a second microcontroller, an ink screen, an energy collection antenna, a rectifier and a matching circuit, and an energy management circuit.

4. The self-driven electronic price tag system based on radio frequency energy according to claim 1, characterized in that: The host computer software includes but is not limited to the following functions: price tag display, inserting pictures, text, shapes, templates, QR codes, barcodes and other information, modifying color, font, font size, burning, equipment detection, price tag information query, price tag information batch import, batch burning.

5. A control method for a self-driven electronic price tag system based on radio frequency energy, characterized in that: The method comprises the following steps: Step 1: The host computer software imports the price tag information list by combining database import and custom editing, and connects the handheld integrated transmitter through the USB interface to burn the update information; Step 2: The first microcontroller stores the update information in the SD card, the first indicator light displays the information interaction status between the handheld integrated transmitter and the host computer software in real time, and the LCD screen displays the burning status; Step 3: The handheld integrated energy and communication transmitter is set to a mobile working state by the host computer, the power button switch is turned on, the RF signal switch is turned on so that the first microcontroller controls the power switch to turn on, the RF signal source enhances the RF signal through the power amplifier, and transmits RF energy through the energy transmitting antenna. The third indicator light indicates the power-on state of the handheld integrated energy and communication transmitter, and the fourth indicator light indicates the power-on state of the RF signal source, that is, the power switch is turned on; Step 4: The energy receiving antenna of the self-driven electronic price tag receives energy, wakes up the self-driven electronic price tag through rectification matching and energy management circuit, and waits for the second communication chip to receive the address information reading request; Step 5: The first microcontroller controls the first communication chip to send an address information reading request to the self-driving electronic price tag through the first communication antenna, the second communication chip returns information to the second microcontroller, and the second microcontroller returns the local address information; Step 6: The handheld integrated transmitter matches the update information corresponding to the address of the self-driving electronic price tag in the local database and sends it to the self-driving electronic price tag; Step 7: After the self-driven electronic price tag receives the information, the second microcontroller determines the update information content according to the command code Update_Flag. Step 8: The handheld integrated transmitter is aimed at the self-driving electronic price tags to be updated one by one, and steps S3 to S7 are repeated continuously to update the price tag information.

6. The self-driven electronic price tag system based on radio frequency energy according to claim 5, characterized in that: In step three, only when the radio frequency signal switch is pressed, the first microcontroller will control the power switch to turn on.

7. The self-driven electronic price tag system based on radio frequency energy according to claim 5, characterized in that: In step five, the first microcontroller of the handheld integrated transmitter sends an address read request to the self-driving electronic price tag through the communication chip 1. At this time, the self-driving electronic price tag is in a waiting state for the price tag information to be updated, and the local address in the FLASH of the second microcontroller is returned.

8. The self-driven electronic price tag system based on radio frequency energy according to claim 5, characterized in that: In step 7, the update information command code Update_Flag is checked. If Update_Flag=00, the second microcontroller directly enters the sleep mode; if Update_Flag=01, the price tag information is updated; If Update_Flag = 10, the price tag address is updated; if Update_Flag = 11, the price tag address and price tag information are updated at the same time. After completing the corresponding responses of Update_Flag = 01, 10, and 11, the second microcontroller returns the update success information, enters the sleep mode, the LCD screen displays the update success, and the second indicator light turns on to indicate the update success.

9. The self-driven electronic price tag system based on radio frequency energy according to claim 5, characterized in that: In step eight, after the information update is completed, the self-driving electronic price label enters the sleep mode.

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