Electronic shelf label with positioning function

Abstract

The utility model discloses a kind of electronic shelf label with positioning function, including battery, bluetooth chip, radio frequency antenna circuit, buzzer drive circuit, buzzer, screen drive circuit, display screen, indicator light circuit and storage circuit;The utility model takes bluetooth chip as core control unit, integrates wireless communication, peripheral drive control, data interaction and the like function, while buzzer drive circuit, screen drive circuit, storage circuit and the like module are directly connected with bluetooth chip port, reduce redundant components and wiring complexity, facilitate equipment miniaturization and cost reduction.

Description

Technical Field

[0001] This utility model relates to the field of detection circuit technology, specifically to an electronic shelf label with positioning function. Background Technology

[0002] The development of smart warehousing has made the demand for precise positioning of goods on shelves increasingly urgent. However, existing smart warehouse management systems with positioning capabilities are mainly suitable for large enterprises due to their high cost and complex deployment, making them difficult to popularize among small and medium-sized enterprises (such as small supermarkets and warehouses). These scenarios urgently need low-cost, low-power, easy-to-deploy, and flexible positioning solutions.

[0003] Current mainstream electronic shelf label positioning technologies have significant drawbacks: AOA Bluetooth positioning: High hardware cost (requires dedicated tags and gateways), and dense deployment of gateways is required to improve accuracy (further increasing costs), and positioning accuracy is easily affected by environmental interference.

[0004] UWB's positioning: High hardware cost and huge power consumption (far exceeding Bluetooth) result in short tag battery life and frequent maintenance.

[0005] Rail-bound label positioning: Deployment is extremely cumbersome (reference labels need to be installed and marked at preset positions on the rail), and the label positions are fixed and cannot be moved flexibly.

[0006] Therefore, existing technologies generally suffer from core defects such as high cost, high power consumption, complex deployment, or poor flexibility, making it difficult to meet the practical needs of small and medium-sized warehouses. Utility Model Content

[0007] In view of this, the main objective of this utility model is to provide an electronic shelf label with positioning function.

[0008] To achieve the above objectives, the technical solution of this utility model is implemented as follows: This utility model embodiment provides an electronic shelf label with positioning function, including: Battery, Bluetooth chip, RF antenna circuit, buzzer driver circuit, buzzer, screen driver circuit, display screen, indicator light circuit and storage circuit; The battery is connected to the VCC terminal of the Bluetooth chip, the buzzer driver circuit, and the screen driver circuit respectively, for power supply. The signal output terminal of the Bluetooth chip is connected to the signal input terminal of the buzzer driver circuit, the signal input terminal of the screen driver circuit, and the signal input terminal of the indicator light circuit, respectively. The signal output terminal of the buzzer driver circuit is connected to the signal input terminal of the buzzer. The signal output terminal of the screen driving circuit is connected to the signal input terminal of the display screen. The Bluetooth chip is communicatively connected to the radio frequency antenna circuit for positioning signal transmission; The Bluetooth chip is communicatively connected to the storage circuit for data storage and interaction.

[0009] In the above scheme, the radio frequency antenna circuit includes an antenna, a second inductor, a third inductor, a fourth inductor, a fifth inductor, an eleventh capacitor, a twenty-seventh capacitor, and a twenty-eighth capacitor. The first end of the fourth inductor is connected to the first end of the third inductor and the RF terminal of the Bluetooth chip. The second end of the third inductor is connected to the first end of the second inductor and the first end of the eleventh capacitor. The second end of the second inductor is connected to the first end of the twenty-seventh capacitor and the first end of the fifth inductor. The second end of the fifth inductor is connected to the first end of the twenty-eighth capacitor and the antenna. The second ends of the fourth inductor, the eleventh capacitor, the twenty-seventh capacitor, and the twenty-eighth capacitor are all grounded.

[0010] In the above scheme, the buzzer driving circuit includes a buzzer driving chip, a 26th capacitor, a 29th capacitor, a 30th capacitor, a 31st capacitor, and a 33rd capacitor. The power output terminal of the battery is connected to the first terminal of the 30th capacitor, the first terminal of the 26th capacitor, and the VDD terminal of the buzzer driving chip, respectively. The second terminals of the 30th capacitor and the 26th capacitor are both grounded. The CP2 terminal of the buzzer driving chip is connected in series with the 31st capacitor and then connected to the CN2 terminal of the buzzer driving chip. The CP1 terminal of the buzzer driving chip is connected to the CN1 terminal of the buzzer driving chip. The VOUT terminal of the buzzer driving chip is connected in series with the 29th capacitor and then grounded. The VO1 terminal of the buzzer driving chip is connected to the first terminal of the buzzer. The VO2 terminal of the buzzer driving chip is connected to the second terminal of the buzzer. The EN1 terminal of the buzzer driving chip is connected to the EN2 terminal of the buzzer driving chip and the GPIO12 terminal of the Bluetooth chip, respectively. The DIN terminal of the buzzer driving chip is connected to the GPIO11 terminal of the Bluetooth chip.

[0011] In the above scheme, the screen driving circuit includes a second resistor, a third resistor, a fourth resistor, a second capacitor, a fourth capacitor, a fifth capacitor, a seventeenth capacitor, a first inductor, a first diode, a second diode, a third diode, and a first transistor. The power output terminal of the battery is connected to the first terminal of the fourth resistor and the first terminal of the seventeenth capacitor, respectively. The second terminal of the seventeenth capacitor is grounded. The second terminal of the fourth resistor is connected to the first terminal of the first inductor, the first terminal of the fifth capacitor, and the first terminal of the second capacitor, respectively. The second terminal of the second capacitor is connected to the second terminal of the fifth capacitor and then grounded. The second terminal of the first inductor is connected to the first terminal of the first capacitor, the anode of the third diode, and the emitter of the first transistor, respectively. The second terminal of the first capacitor is connected to the anode of the first diode and the cathode of the second diode, respectively. The cathode of the first diode is grounded. The cathode of the third diode is connected to the fourth capacitor in series and then grounded. The collector of the first transistor is connected to the first terminal of the third resistor. The second terminal of the third resistor is connected to the first terminal of the second resistor and then grounded. The second terminal of the second resistor is connected to the base of the first transistor.

[0012] In the above scheme, the PREVGL terminal of the display screen is connected to the positive terminal of the second diode, the PREVGH terminal of the display screen is connected to the negative terminal of the third diode, the base of the first transistor is connected to the GDR terminal of the display screen, and the RESE terminal of the display screen is connected to the collector of the first transistor.

[0013] In the above scheme, the DIS_BUSY terminal of the display screen is connected to the GPIO09 terminal of the Bluetooth chip, the DIS_RES terminal of the display screen is connected to the GPIO10 terminal of the Bluetooth chip, the DIS_D / C terminal of the display screen is connected to the GPIO20 terminal of the Bluetooth chip, the DIS_CS terminal of the display screen is connected to the GPIO22 terminal of the Bluetooth chip, the DIS_SCL terminal of the display screen is connected to the GPIO15 terminal of the Bluetooth chip, and the DIS_SDA terminal of the display screen is connected to the GPIO21 terminal of the Bluetooth chip.

[0014] In the above scheme, the indicator light circuit includes a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a twelfth resistor, a fourteenth resistor, and a fifteenth resistor. The power output terminal of the battery is connected to the positive terminals of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode, respectively. The negative terminal of the first light-emitting diode is connected to the GPIO08 terminal of the Bluetooth chip after being connected in series with the twelfth resistor. The negative terminal of the second light-emitting diode is connected to the GPIO03 terminal of the Bluetooth chip after being connected in series with the fourteenth resistor. The negative terminal of the third light-emitting diode is connected to the GPIO02 terminal of the Bluetooth chip after being connected in series with the fifteenth resistor.

[0015] In the above scheme, the storage circuit includes a memory, a thirteenth resistor, and a thirty-second capacitor. The output terminal of the power supply is connected to the WP terminal of the memory, the first terminal of the thirty-second capacitor, the VCC terminal of the memory, and the first terminal of the thirteenth resistor, respectively. The second terminal of the thirteenth resistor is connected to the HOLD terminal of the memory. The second terminal of the thirty-second capacitor is grounded. The Flash_DO terminal of the memory is connected to the GPIO16 terminal of the Bluetooth chip. The Flash_DI terminal of the memory is connected to the GPIO17 terminal of the Bluetooth chip. The Flash_CS terminal of the memory is connected to the GPIO18 terminal of the Bluetooth chip. The Flash_CLK terminal of the memory is connected to the GPIO19 terminal of the Bluetooth chip.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention uses a Bluetooth chip as the core control unit, integrating functions such as wireless communication, peripheral device drive control, and data interaction. At the same time, modules such as the buzzer drive circuit, screen drive circuit, and storage circuit are directly connected to the Bluetooth chip port, reducing redundant components and wiring complexity, and facilitating device miniaturization and cost reduction. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this invention, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of an electronic shelf label with positioning function according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the Bluetooth chip in an electronic shelf label with positioning function according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the radio frequency antenna circuit in an electronic shelf label with positioning function according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the buzzer drive circuit in an electronic shelf label with positioning function according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the screen driving circuit in an electronic shelf label with positioning function according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the indicator light circuit in an electronic shelf label with positioning function according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the storage circuit in an electronic shelf label with positioning function according to an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that the terms "first", "second", "third", etc. are only for the convenience of distinguishing and describing the same components, and do not indicate or imply the number of the components referred to. They should not be construed as limitations on this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0020] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0021] This utility model embodiment provides an electronic shelf label with positioning function, such as Figure 1-7 As shown, it includes: Battery, Bluetooth chip MU1, RF antenna circuit, buzzer driver circuit, buzzer BZ1, screen driver circuit, display screen J1, indicator light circuit and storage circuit; The battery is connected to the VCC terminal of the Bluetooth chip MU1, the buzzer driver circuit, and the screen driver circuit respectively, for power supply. The signal output terminal of the Bluetooth chip MU1 is connected to the signal input terminal of the buzzer driver circuit, the signal input terminal of the screen driver circuit, and the signal input terminal of the indicator light circuit, respectively. The signal output terminal of the buzzer driver circuit is connected to the signal input terminal of the buzzer BZ1. The signal output terminal of the screen driving circuit is connected to the signal input terminal of the display screen J1; The Bluetooth chip MU1 is communicatively connected to the radio frequency antenna circuit and is used for positioning signal transmission; The Bluetooth chip MU1 is communicatively connected to the storage circuit for data storage and interaction.

[0022] like Figure 3 As shown, the radio frequency antenna circuit includes antenna ANT1, second inductor L2, third inductor L3, fourth inductor L4, fifth inductor L5, eleventh capacitor C11, twenty-seventh capacitor C27, and twenty-eighth capacitor C28. The first end of the fourth inductor L4 is connected to the first end of the third inductor L3 and the RF terminal of Bluetooth chip MU1. The second end of the third inductor L3 is connected to the first end of the second inductor L2 and the first end of the eleventh capacitor C11. The second end of the second inductor L2 is connected to the first end of the twenty-seventh capacitor C27 and the first end of the fifth inductor L5. The second end of the fifth inductor L5 is connected to the first end of the twenty-eighth capacitor C28 and antenna ANT1. The second ends of the fourth inductor L4, the eleventh capacitor C11, the twenty-seventh capacitor C27, and the twenty-eighth capacitor C28 are all grounded.

[0023] like Figure 2 and Figure 4 As shown, the buzzer driver circuit includes a buzzer driver chip U4, a 26th capacitor C26, a 29th capacitor C29, a 30th capacitor C30, a 31st capacitor C31, and a 33rd capacitor C33. The power output terminal of the battery is connected to the first terminal of the 30th capacitor C30, the first terminal of the 26th capacitor C26, and the VDD terminal of the buzzer driver chip U4, respectively. The second terminals of the 30th capacitor C30 and the 26th capacitor C26 are both grounded. The CP2 terminal of the buzzer driver chip U4 is connected in series with the 31st capacitor C31 and then connected to the CN2 terminal of the buzzer driver chip U4. The CP1 terminal of the buzzer driver chip U4 is connected to the CN1 terminal of the buzzer driver chip U4. The VOUT terminal of the buzzer driver chip U4 is connected to ground after being connected in series with the 29th capacitor C29. The VO1 terminal of the buzzer driver chip U4 is connected to the first terminal of the buzzer BZ1. The VO2 terminal of the buzzer driver chip U4 is connected to the second terminal of the buzzer BZ1. The EN1 terminal of the buzzer driver chip U4 is connected to the EN2 terminal of the buzzer driver chip U4 and the GPIO12 terminal of the Bluetooth chip MU1. The DIN terminal of the buzzer driver chip U4 is connected to the GPIO11 terminal of the Bluetooth chip MU1.

[0024] like Figure 2 and Figure 5As shown, the screen driving circuit includes a second resistor R2, a third resistor R3, a fourth resistor R4, a second capacitor C2, a fourth capacitor C4, a fifth capacitor C5, a seventeenth capacitor C17, a first inductor L1, a first diode D1, a second diode D2, a third diode D3, and a first transistor Q1. The power output terminal of the battery is connected to the first terminal of the fourth resistor R4 and the first terminal of the seventeenth capacitor C17, respectively. The second terminal of the seventeenth capacitor C17 is grounded. The second terminal of the fourth resistor R4 is connected to the first terminal of the first inductor L1, the first terminal of the fifth capacitor C5, and the first terminal of the second capacitor C2, respectively. The second terminal of the second capacitor C2 is connected to... The second terminal of the fifth capacitor C5 is connected to ground. The second terminal of the first inductor L1 is connected to the first terminal of the first capacitor C1, the positive terminal of the third diode D3, and the emitter of the first transistor Q1. The second terminal of the first capacitor C1 is connected to the positive terminal of the first diode D1 and the negative terminal of the second diode D2. The negative terminal of the first diode D1 is grounded. The negative terminal of the third diode D3 is connected to the fourth capacitor C4 in series and then grounded. The collector of the first transistor Q1 is connected to the first terminal of the third resistor R3. The second terminal of the third resistor R3 is connected to the first terminal of the second resistor R2 and then grounded. The second terminal of the second resistor R2 is connected to the base of the first transistor Q1.

[0025] like Figure 2 and Figure 5 As shown, the PREVGL terminal of the display screen J1 is connected to the positive terminal of the second diode D2, the PREVGH terminal of the display screen J1 is connected to the negative terminal of the third diode D3, the base of the first transistor Q1 is connected to the GDR terminal of the display screen J1, and the RESE terminal of the display screen J1 is connected to the collector of the first transistor Q1.

[0026] like Figure 2 and Figure 5 As shown, the DIS_BUSY terminal of the display screen J1 is connected to the GPIO09 terminal of the Bluetooth chip MU1, the DIS_RES terminal of the display screen J1 is connected to the GPIO10 terminal of the Bluetooth chip MU1, the DIS_D / C terminal of the display screen J1 is connected to the GPIO20 terminal of the Bluetooth chip MU1, the DIS_CS terminal of the display screen J1 is connected to the GPIO22 terminal of the Bluetooth chip MU1, the DIS_SCL terminal of the display screen J1 is connected to the GPIO15 terminal of the Bluetooth chip MU1, and the DIS_SDA terminal of the display screen J1 is connected to the GPIO21 terminal of the Bluetooth chip MU1.

[0027] like Figure 2 and Figure 6As shown, the indicator circuit includes a first light-emitting diode (LED1), a second light-emitting diode (LED2), a third light-emitting diode (LED3), a twelfth resistor (R12), a fourteenth resistor (R14), and a fifteenth resistor (R15). The power output terminal of the battery is connected to the positive terminals of the first light-emitting diode (LED1), the second light-emitting diode (LED2), and the third light-emitting diode (LED3), respectively. The negative terminal of the first light-emitting diode (LED1) is connected in series with the twelfth resistor (R12) and then connected to the GPIO08 terminal of the Bluetooth chip MU1. The negative terminal of the second light-emitting diode (LED2) is connected in series with the fourteenth resistor (R14) and then connected to the GPIO03 terminal of the Bluetooth chip MU1. The negative terminal of the third light-emitting diode (LED3) is connected in series with the fifteenth resistor (R15) and then connected to the GPIO02 terminal of the Bluetooth chip MU1.

[0028] like Figure 2 and Figure 7 As shown, the storage circuit includes a memory U3, a thirteenth resistor R13, and a thirty-second capacitor C32. The output terminal of the power supply is connected to the WP terminal of the memory U3, the first terminal of the thirty-second capacitor C32, the VCC terminal of the memory U3, and the first terminal of the thirteenth resistor R13. The second terminal of the thirteenth resistor R13 is connected to the HOLD terminal of the memory U3. The second terminal of the thirty-second capacitor C32 is grounded. The Flash_DO terminal of the memory U3 is connected to the GPIO16 terminal of the Bluetooth chip MU1. The Flash_DI terminal of the memory U3 is connected to the GPIO17 terminal of the Bluetooth chip MU1. The Flash_CS terminal of the memory U3 is connected to the GPIO18 terminal of the Bluetooth chip MU1. The Flash_CLK terminal of the memory U3 is connected to the GPIO19 terminal of the Bluetooth chip MU1.

[0029] The working principle of this utility model is as follows: like Figure 1-7 As shown, the working principle of this solution is based on the Bluetooth chip MU1 as the core control unit, which coordinates various functional modules to realize functions such as wireless communication, status display, audio and visual prompts, and data storage. The specific workflow is as follows: 1. Working principle of power supply system The battery provides power to the entire circuit, distributing electrical energy through the following paths: Power is directly supplied to the VCC terminal of the Bluetooth chip MU1 to ensure the operation of the main control unit; Power is supplied to the buzzer driver circuit (VDD terminal of buzzer driver chip U4), and power supply noise is filtered through the 30th capacitor C30 and the 26th capacitor C26 to ensure stable operation of the driver chip. The power supply to the screen driving circuit is limited by the fourth resistor R4, and then a stable voltage is provided to the display screen J1 and related driving components (such as the first inductor L1 and the first transistor Q1) through a filter network composed of the seventeenth capacitor C17, the second capacitor C2, and the fifth capacitor C5. Power is supplied to the indicator light circuit and the storage circuit, providing operating voltage to the first light-emitting diode LED1, the second light-emitting diode LED2, the third light-emitting diode LED3 and the storage device U3 respectively, and suppressing power fluctuations through components such as the thirty-second capacitor C32.

[0030] 2. Bluetooth Communication and Radio Frequency Transmission Principles The Bluetooth chip MU1 connects to the radio frequency antenna circuit via its RF terminal to enable wireless signal transmission and reception. During transmission, the radio frequency signal output by the Bluetooth chip MU1 undergoes impedance adjustment through a matching network composed of the fourth inductor L4, the third inductor L3, the second inductor L2, and the fifth inductor L5 to reduce signal reflection. The eleventh capacitor C11, the twenty-seventh capacitor C27, and the twenty-eighth capacitor C28 are used to filter out high-frequency noise and ensure signal purity, which is ultimately radiated into space through the antenna ANT1. During reception, the external signal captured by antenna ANT1 is filtered by the matching network and then transmitted to Bluetooth chip MU1 to complete the reception of positioning signals or control commands.

[0031] 3. Buzzer driving principle The Bluetooth chip MU1 sends control signals (such as pulse width modulation signals PWM) to the DIN terminal of the buzzer driver chip U4 through the GPIO11 terminal, and at the same time controls the enable state of the driver chip through the GPIO12 terminal (connected to the EN1 / EN2 terminal). The buzzer driver chip U4 internally forms an oscillation circuit with the thirty-first capacitor C31 through the CP1 / CN1 and CP2 / CN2 terminals to convert the input signal into a driving voltage; The driving voltage is output to the buzzer BZ1 through the VO1 and VO2 terminals, causing it to vibrate and produce sound, thus realizing the sound and light prompt function (such as alarm, operation feedback). The twenty-ninth capacitor, C29, is used to stabilize the output voltage of the driver chip and prevent sound distortion.

[0032] 4. Display screen driving and control principles The screen driver circuit provides operating voltage and control signals to the display screen J1: After being converted by components such as the first inductor L1 and the third diode D3, the power supply provides voltage to the PREVGH terminal (high voltage drive) of the display screen J1; The circuit consisting of the second diode D2 and the first diode D1 provides a stable voltage to the PREVGL terminal (low-voltage drive) of the display screen J1; The first transistor Q1 is controlled by the GDR terminal of the display screen J1. By adjusting the reset signal (RESE terminal) of the display screen through the on / off state, it works with the third resistor R3 and the second resistor R2 to achieve current limitation. Bluetooth chip MU1 communicates with display J1 via GPIO interface: GPIO09 (DIS_BUSY) detects the busy / idle status of the display screen, GPIO10 (DIS_RES) controls the reset, and GPIO20 (DIS_D / C) distinguishes between data and command signals. Serial data transmission is achieved through GPIO22 (DIS_CS) chip select control, in conjunction with GPIO15 (DIS_SCL) and GPIO21 (DIS_SDA), to refresh the display of images or text.

[0033] 5. Indicator lights and status feedback principle The battery provides positive voltage to the first light-emitting diode LED1, the second light-emitting diode LED2, and the third light-emitting diode LED3. Their negative terminals are connected to the GPIO08, GPIO03, and GPIO02 terminals of the Bluetooth chip MU1 through the twelfth resistor R12, the fourteenth resistor R14, and the fifteenth resistor R15, respectively. The Bluetooth chip MU1 controls the high and low levels of the GPIO interface to turn the corresponding LEDs on or off or blink, providing intuitive feedback on the device status (such as power on, Bluetooth connection, data transmission, etc.).

[0034] 6. Data storage and interaction principles Memory U3 communicates with Bluetooth chip MU1 via SPI interface: The Bluetooth chip MU1 uses GPIO16 (Flash_DO) to receive data output from the memory, GPIO17 (Flash_DI) to send write data, GPIO18 (Flash_CS) to control the chip select, and GPIO19 (Flash_CLK) to provide the clock signal. The thirteenth resistor R13 pulls the HOLD terminal of memory U3 to the power supply to prevent communication interruption caused by interference during data transmission. The thirty-second capacitor C32 filters power supply noise and ensures stable VCC voltage for memory U3; The Bluetooth chip MU1 can write device configuration information, operation logs, and received external data to the storage U3, or read historical data for processing, thus realizing local data storage and interaction.

[0035] In summary, under the coordinated control of the Bluetooth chip MU1, the modules work together through standardized interfaces and stable drive circuits to complete core functions such as wireless communication, status display, audio and visual prompts, and data storage, making them suitable for smart terminal scenarios that require portability and reliability.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. An electronic shelf label with positioning function, characterized in that, include: Battery, Bluetooth chip, RF antenna circuit, buzzer driver circuit, buzzer, screen driver circuit, display screen, indicator light circuit and storage circuit; The battery is connected to the VCC terminal of the Bluetooth chip, the buzzer driver circuit, and the screen driver circuit respectively, for power supply. The signal output terminal of the Bluetooth chip is connected to the signal input terminal of the buzzer driver circuit, the signal input terminal of the screen driver circuit, and the signal input terminal of the indicator light circuit, respectively. The signal output terminal of the buzzer driver circuit is connected to the signal input terminal of the buzzer. The signal output terminal of the screen driving circuit is connected to the signal input terminal of the display screen. The Bluetooth chip is communicatively connected to the radio frequency antenna circuit for positioning signal transmission; The Bluetooth chip is communicatively connected to the storage circuit for data storage and interaction.

2. The electronic shelf label with positioning function according to claim 1, characterized in that, The radio frequency antenna circuit includes an antenna, a second inductor, a third inductor, a fourth inductor, a fifth inductor, an eleventh capacitor, a twenty-seventh capacitor, and a twenty-eighth capacitor. The first end of the fourth inductor is connected to the first end of the third inductor and the RF terminal of the Bluetooth chip. The second end of the third inductor is connected to the first end of the second inductor and the first end of the eleventh capacitor. The second end of the second inductor is connected to the first end of the twenty-seventh capacitor and the first end of the fifth inductor. The second end of the fifth inductor is connected to the first end of the twenty-eighth capacitor and the antenna. The second ends of the fourth inductor, the eleventh capacitor, the twenty-seventh capacitor, and the twenty-eighth capacitor are all grounded.

3. An electronic shelf label with positioning function according to claim 2, characterized in that, The buzzer driver circuit includes a buzzer driver chip, a 26th capacitor, a 29th capacitor, a 30th capacitor, a 31st capacitor, and a 33rd capacitor. The power output terminal of the battery is connected to the first terminal of the 30th capacitor, the first terminal of the 26th capacitor, and the VDD terminal of the buzzer driver chip, respectively. The second terminals of the 30th capacitor and the 26th capacitor are both grounded. The CP2 terminal of the buzzer driver chip is connected in series with the 31st capacitor and then connected to the CN2 terminal of the buzzer driver chip. The CP1 terminal of the buzzer driver chip is connected to the CN1 terminal of the buzzer driver chip. The VOUT terminal of the buzzer driver chip is connected in series with the 29th capacitor and then grounded. The VO1 terminal of the buzzer driver chip is connected to the first terminal of the buzzer. The VO2 terminal of the buzzer driver chip is connected to the second terminal of the buzzer. The EN1 terminal of the buzzer driver chip is connected to the EN2 terminal of the buzzer driver chip and the GPIO12 terminal of the Bluetooth chip, respectively. The DIN terminal of the buzzer driver chip is connected to the GPIO11 terminal of the Bluetooth chip.

4. An electronic shelf label with positioning function according to claim 3, characterized in that, The screen driving circuit includes a second resistor, a third resistor, a fourth resistor, a second capacitor, a fourth capacitor, a fifth capacitor, a seventeenth capacitor, a first inductor, a first diode, a second diode, a third diode, and a first transistor. The power output terminal of the battery is connected to the first terminal of the fourth resistor and the first terminal of the seventeenth capacitor, respectively. The second terminal of the seventeenth capacitor is grounded. The second terminal of the fourth resistor is connected to the first terminal of the first inductor, the first terminal of the fifth capacitor, and the first terminal of the second capacitor, respectively. The second terminal of the second capacitor is connected to the second terminal of the fifth capacitor and then grounded. The second terminal of the first inductor is connected to the first terminal of the first capacitor, the anode of the third diode, and the emitter of the first transistor, respectively. The second terminal of the first capacitor is connected to the anode of the first diode and the cathode of the second diode, respectively. The cathode of the first diode is grounded. The cathode of the third diode is connected to the fourth capacitor in series and then grounded. The collector of the first transistor is connected to the first terminal of the third resistor. The second terminal of the third resistor is connected to the first terminal of the second resistor and then grounded. The second terminal of the second resistor is connected to the base of the first transistor.

5. An electronic shelf label with positioning function according to claim 4, characterized in that, The PREVGL terminal of the display screen is connected to the positive terminal of the second diode, the PREVGH terminal of the display screen is connected to the negative terminal of the third diode, the base of the first transistor is connected to the GDR terminal of the display screen, and the RESE terminal of the display screen is connected to the collector of the first transistor.

6. An electronic shelf label with positioning function according to claim 5, characterized in that, The display screen's DIS_BUSY terminal is connected to the Bluetooth chip's GPIO09 terminal, the display screen's DIS_RES terminal is connected to the Bluetooth chip's GPIO10 terminal, the display screen's DIS_D / C terminal is connected to the Bluetooth chip's GPIO20 terminal, the display screen's DIS_CS terminal is connected to the Bluetooth chip's GPIO22 terminal, the display screen's DIS_SCL terminal is connected to the Bluetooth chip's GPIO15 terminal, and the display screen's DIS_SDA terminal is connected to the Bluetooth chip's GPIO21 terminal.

7. An electronic shelf label with positioning function according to claim 6, characterized in that, The indicator light circuit includes a first LED, a second LED, a third LED, a twelfth resistor, a fourteenth resistor, and a fifteenth resistor. The power output terminal of the battery is connected to the positive terminals of the first LED, the second LED, and the third LED, respectively. The negative terminal of the first LED is connected in series with the twelfth resistor and then connected to the GPIO08 terminal of the Bluetooth chip. The negative terminal of the second LED is connected in series with the fourteenth resistor and then connected to the GPIO03 terminal of the Bluetooth chip. The negative terminal of the third LED is connected in series with the fifteenth resistor and then connected to the GPIO02 terminal of the Bluetooth chip.

8. An electronic shelf label with positioning function according to claim 7, characterized in that, The storage circuit includes a memory, a thirteenth resistor, and a thirty-second capacitor. The output terminal of the power supply is connected to the WP terminal of the memory, the first terminal of the thirty-second capacitor, the VCC terminal of the memory, and the first terminal of the thirteenth resistor, respectively. The second terminal of the thirteenth resistor is connected to the HOLD terminal of the memory. The second terminal of the thirty-second capacitor is grounded. The Flash_DO terminal of the memory is connected to the GPIO16 terminal of the Bluetooth chip. The Flash_DI terminal of the memory is connected to the GPIO17 terminal of the Bluetooth chip. The Flash_CS terminal of the memory is connected to the GPIO18 terminal of the Bluetooth chip. The Flash_CLK terminal of the memory is connected to the GPIO19 terminal of the Bluetooth chip.

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