Passive electronic tag display device

Abstract

The utility model relates to the technical field of electronic tags, in particular to a passive electronic tag display device, which comprises a solar photovoltaic unit, a super capacitor energy storage unit, an ultrahigh frequency antenna, an ultrahigh frequency chip, a main control unit and an electronic paper display unit, the main control unit is electrically connected with the super-capacitor energy storage unit, the ultrahigh frequency chip and the electronic paper display unit, the solar photovoltaic unit is electrically connected with the super-capacitor energy storage unit, and the ultrahigh frequency antenna is electrically connected with the ultrahigh frequency chip, so that long-distance data transmission can be realized, the electronic tag can be permanently continued, and the service life of the electronic tag is prolonged. A built-in battery is prevented from being used for supplying power to the electronic tag, so that the convenience of commodity management is improved, and the management cost of a shopping mall is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electronic tag technology, and in particular to a passive electronic tag display device. Background Technology

[0002] Currently, shopping malls generally use electronic tags to display product information, such as product number, product name, product specifications, product price, and product origin, in order to achieve unified management of products.

[0003] However, since existing electronic tags are generally powered by built-in batteries, the batteries must be replaced or new electronic tags must be replaced in time when the battery is depleted. This makes it impossible to guarantee the permanent battery life of existing electronic tags. Moreover, existing electronic tags only support short-range data transmission (i.e., NFC is required to read and update data), which brings many inconveniences to product management and increases product management costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a passive electronic tag display device that can not only realize long-distance data transmission, but also enable the electronic tag to have a permanent battery life, avoiding the need to use a built-in battery to power the electronic tag, thereby improving the convenience of merchandise management and reducing the management cost of shopping malls.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A passive electronic tag display device includes a solar photovoltaic unit, a supercapacitor energy storage unit, an ultra-high frequency antenna, an ultra-high frequency chip, a main control unit, and an electronic paper display unit. The main control unit is electrically connected to the supercapacitor energy storage unit, the ultra-high frequency chip, and the electronic paper display unit. The solar photovoltaic unit is electrically connected to the supercapacitor energy storage unit, and the ultra-high frequency antenna is electrically connected to the ultra-high frequency chip.

[0007] Furthermore, the UHF chip is model CAB1, the first pin of the UHF chip is electrically connected to the UHF antenna, the second, third, fourth, fifth and sixth pins of the UHF chip are all electrically connected to the main control unit, and the eighth pin of the UHF chip is grounded.

[0008] Furthermore, it also includes inductors L2 and L3. One end of inductor L2 is electrically connected to the UHF antenna, and the other end of inductor L2 is electrically connected to one end of inductor L3 and the first pin of the UHF chip, respectively. The other end of inductor L3 is grounded.

[0009] Furthermore, it also includes resistors R8 and R9. One end of resistor R8 is electrically connected to the third pin of the UHF chip, and the other end of resistor R8 is electrically connected to the fifth pin of the UHF chip. One end of resistor R9 is electrically connected to the fourth pin of the UHF chip, and the other end of resistor R9 is electrically connected to the fifth pin of the UHF chip.

[0010] Furthermore, the main control unit includes a chip U2, which is model CW32L010. The first pin of the chip U2 is electrically connected to the second pin of the UHF chip, the second pin of the chip U2 is electrically connected to the third pin of the UHF chip, the third pin of the chip U2 is electrically connected to the fourth pin of the UHF chip, the fifth pin of the chip U2 is electrically connected to the sixth pin of the UHF chip, the eleventh, twelfth, thirteenth, fourteenth, fifteenth and sixteenth pins of the chip U2 are all electrically connected to the electronic paper display unit, and the ninth pin of the chip U2 is electrically connected to the supercapacitor energy storage unit.

[0011] Furthermore, the supercapacitor energy storage unit includes connector J8 and connector J9, each of which is connected to a supercapacitor. Connector J8 is electrically connected to the solar photovoltaic unit, and connector J9 is electrically connected to both the solar photovoltaic unit and connector J8.

[0012] Furthermore, the supercapacitor energy storage unit also includes resistor R14, resistor R12, chip U4, resistor R13, capacitor C16, diode D1 and resistor R15, and the chip U4 is model DW06D;

[0013] The first pin of chip U4 is electrically connected to one end of resistor R12. The other end of resistor R12 is electrically connected to one end of resistor R14 and the second pin of chip U4, and the other end of resistor R12, one end of resistor R14, and the second pin of chip U4 are all grounded. The third pin of chip U4 is electrically connected to the sixth pin of chip U4, one end of resistor R13, the solar photovoltaic unit, the other end of resistor R14, and connector J9. The fifth pin of chip U4 is electrically connected to the other end of resistor R13 and one end of capacitor C16. The other end of capacitor C16 is electrically connected to the anode of diode D1, one end of resistor R15, connector J8, and the solar photovoltaic unit. The cathode of diode D1 is electrically connected to the other end of resistor R15 and the main control unit.

[0014] Furthermore, the solar photovoltaic unit includes connector J6 and connector J7, each of which has a solar panel inserted into it. Connector J6 is electrically connected to connectors J7, J8, and J9 respectively.

[0015] Furthermore, the solar photovoltaic unit also includes resistor R10, resistor R11, capacitor C15, and chip U3, wherein chip U3 is model DW06D;

[0016] The first pin of chip U3 is electrically connected to one end of resistor R10. The second pin of chip U3 is electrically connected to the other end of resistor R10 and connector J7. The third pin of chip U3 is electrically connected to the sixth pin of chip U3, one end of resistor R11 and supercapacitor energy storage unit. The fifth pin of chip U3 is electrically connected to the other end of resistor R11 and one end of capacitor C15. The other end of capacitor C15 is electrically connected to connector J6 and supercapacitor energy storage unit.

[0017] Furthermore, the electronic paper display unit includes a display chip J4, which is model PV213048. The ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, and fifteenth pins of the display chip J4 are all electrically connected to the main control unit.

[0018] The beneficial effects of this utility model are as follows:

[0019] This solution utilizes a solar photovoltaic unit, a supercapacitor energy storage unit, an ultra-high frequency (UHF) antenna, an UHF chip, a main control unit, and an electronic paper display unit. Through the cooperation of the UHF antenna and UHF chip, it can support long-distance data updates over distances of several meters. A person can simply carry a handheld device from a distance to change the content on the electronic tag's display screen, thus replacing the existing technology that requires NFC to be placed on the tag for data updates. The solar photovoltaic unit collects solar energy and stores it in the supercapacitor energy storage unit, which can then be released to power the main control unit. The UHF chip is normally in standby mode and does not consume power, but it will activate when needed. When the handheld device approaches within a few meters, it wirelessly transmits energy to the ultra-high frequency chip to operate, outputting an interrupt to wake up the main control unit. When the main control unit is awakened, the solar energy stored in the supercapacitor energy storage unit is released to power the main control unit. The main control unit reads the data in the ultra-high frequency chip that needs to be updated in the electronic paper display unit and controls the update to be displayed on the electronic paper display screen. This not only enables long-distance data transmission but also allows the electronic tag to have a permanent battery life, avoiding the need to use an internal battery to power the electronic tag. This improves the convenience of merchandise management and reduces the management costs of the shopping mall. Attached Figure Description

[0020] Figure 1 This is a block diagram showing the module connection of the passive electronic tag display device of this utility model;

[0021] Figure 2 This is a circuit diagram of the UHF antenna and UHF chip of the passive electronic tag display device of this utility model;

[0022] Figure 3 This is a circuit diagram of the main control unit of the passive electronic tag display device of this utility model;

[0023] Figure 4 This is a circuit diagram of the solar photovoltaic unit and the supercapacitor energy storage unit of the passive electronic tag display device of this utility model.

[0024] Figure 5 This is a circuit diagram of the electronic paper display unit of the passive electronic tag display device of this utility model;

[0025] Label Explanation:

[0026] 1. Solar photovoltaic unit; 2. Supercapacitor energy storage unit; 3. UHF antenna; 4. UHF chip; 5. Main control unit; 6. Electronic paper display unit. Detailed Implementation

[0027] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0028] Please refer to Figure 1 The technical solution adopted by this utility model is as follows:

[0029] A passive electronic tag display device includes a solar photovoltaic unit, a supercapacitor energy storage unit, an ultra-high frequency antenna, an ultra-high frequency chip, a main control unit, and an electronic paper display unit. The main control unit is electrically connected to the supercapacitor energy storage unit, the ultra-high frequency chip, and the electronic paper display unit. The solar photovoltaic unit is electrically connected to the supercapacitor energy storage unit, and the ultra-high frequency antenna is electrically connected to the ultra-high frequency chip.

[0030] As can be seen from the above description, the beneficial effects of this utility model are as follows:

[0031] This solution utilizes a solar photovoltaic unit, a supercapacitor energy storage unit, an ultra-high frequency (UHF) antenna, an UHF chip, a main control unit, and an electronic paper display unit. Through the cooperation of the UHF antenna and UHF chip, it can support long-distance data updates over distances of several meters. A person can simply carry a handheld device from a distance to change the content on the electronic tag's display screen, thus replacing the existing technology that requires NFC to be placed on the tag for data updates. The solar photovoltaic unit collects solar energy and stores it in the supercapacitor energy storage unit, which can then be released to power the main control unit. The UHF chip is normally in standby mode and does not consume power, but it will activate when needed. When the handheld device approaches within a few meters, it wirelessly transmits energy to the ultra-high frequency chip to operate, outputting an interrupt to wake up the main control unit. When the main control unit is awakened, the solar energy stored in the supercapacitor energy storage unit is released to power the main control unit. The main control unit reads the data in the ultra-high frequency chip that needs to be updated in the electronic paper display unit and controls the update to be displayed on the electronic paper display screen. This not only enables long-distance data transmission but also allows the electronic tag to have a permanent battery life, avoiding the need to use an internal battery to power the electronic tag. This improves the convenience of merchandise management and reduces the management costs of the shopping mall.

[0032] Furthermore, the UHF chip is model CAB1, the first pin of the UHF chip is electrically connected to the UHF antenna, the second, third, fourth, fifth and sixth pins of the UHF chip are all electrically connected to the main control unit, and the eighth pin of the UHF chip is grounded.

[0033] Furthermore, it also includes inductors L2 and L3. One end of inductor L2 is electrically connected to the UHF antenna, and the other end of inductor L2 is electrically connected to one end of inductor L3 and the first pin of the UHF chip, respectively. The other end of inductor L3 is grounded.

[0034] As can be seen from the above description, impedance matching with the UHF antenna is achieved by setting inductors L2 and L3.

[0035] Furthermore, it also includes resistors R8 and R9. One end of resistor R8 is electrically connected to the third pin of the UHF chip, and the other end of resistor R8 is electrically connected to the fifth pin of the UHF chip. One end of resistor R9 is electrically connected to the fourth pin of the UHF chip, and the other end of resistor R9 is electrically connected to the fifth pin of the UHF chip.

[0036] As can be seen from the above description, resistors R8 and R9 act as pull-up resistors, serving to limit current and provide protection.

[0037] Furthermore, the main control unit includes a chip U2, which is model CW32L010. The first pin of the chip U2 is electrically connected to the second pin of the UHF chip, the second pin of the chip U2 is electrically connected to the third pin of the UHF chip, the third pin of the chip U2 is electrically connected to the fourth pin of the UHF chip, the fifth pin of the chip U2 is electrically connected to the sixth pin of the UHF chip, the eleventh, twelfth, thirteenth, fourteenth, fifteenth and sixteenth pins of the chip U2 are all electrically connected to the electronic paper display unit, and the ninth pin of the chip U2 is electrically connected to the supercapacitor energy storage unit.

[0038] Furthermore, the supercapacitor energy storage unit includes connector J8 and connector J9, each of which is connected to a supercapacitor. Connector J8 is electrically connected to the solar photovoltaic unit, and connector J9 is electrically connected to both the solar photovoltaic unit and connector J8.

[0039] Furthermore, the supercapacitor energy storage unit also includes resistor R14, resistor R12, chip U4, resistor R13, capacitor C16, diode D1 and resistor R15, and the chip U4 is model DW06D;

[0040] The first pin of chip U4 is electrically connected to one end of resistor R12. The other end of resistor R12 is electrically connected to one end of resistor R14 and the second pin of chip U4, and the other end of resistor R12, one end of resistor R14, and the second pin of chip U4 are all grounded. The third pin of chip U4 is electrically connected to the sixth pin of chip U4, one end of resistor R13, the solar photovoltaic unit, the other end of resistor R14, and connector J9. The fifth pin of chip U4 is electrically connected to the other end of resistor R13 and one end of capacitor C16. The other end of capacitor C16 is electrically connected to the anode of diode D1, one end of resistor R15, connector J8, and the solar photovoltaic unit. The cathode of diode D1 is electrically connected to the other end of resistor R15 and the main control unit.

[0041] Furthermore, the solar photovoltaic unit includes connector J6 and connector J7, each of which has a solar panel inserted into it. Connector J6 is electrically connected to connectors J7, J8, and J9 respectively.

[0042] Furthermore, the solar photovoltaic unit also includes resistor R10, resistor R11, capacitor C15, and chip U3, wherein chip U3 is model DW06D;

[0043] The first pin of chip U3 is electrically connected to one end of resistor R10. The second pin of chip U3 is electrically connected to the other end of resistor R10 and connector J7. The third pin of chip U3 is electrically connected to the sixth pin of chip U3, one end of resistor R11 and supercapacitor energy storage unit. The fifth pin of chip U3 is electrically connected to the other end of resistor R11 and one end of capacitor C15. The other end of capacitor C15 is electrically connected to connector J6 and supercapacitor energy storage unit.

[0044] Furthermore, the electronic paper display unit includes a display chip J4, which is model PV213048. The ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, and fifteenth pins of the display chip J4 are all electrically connected to the main control unit.

[0045] Please refer to Figures 1 to 5 As shown, Embodiment 1 of this utility model is as follows:

[0046] Please refer to Figure 1 A passive electronic tag display device includes a solar photovoltaic unit 1, a supercapacitor energy storage unit 2, an ultra-high frequency antenna 3, an ultra-high frequency chip 4, a main control unit 5, and an electronic paper display unit 6. The main control unit 5 is electrically connected to the supercapacitor energy storage unit 2, the ultra-high frequency chip 4, and the electronic paper display unit 6, respectively. The solar photovoltaic unit 1 is electrically connected to the supercapacitor energy storage unit 2, and the ultra-high frequency antenna 3 is electrically connected to the ultra-high frequency chip 4.

[0047] Please refer to Figure 2 The UHF chip 4 is model CAB1. The first pin of the UHF chip 4 is electrically connected to the UHF antenna 3. The second, third, fourth, fifth and sixth pins of the UHF chip 4 are all electrically connected to the main control unit 5. The eighth pin of the UHF chip 4 is grounded.

[0048] Please refer to Figure 2 It also includes inductors L2 and L3. One end of inductor L2 is electrically connected to the UHF antenna 3, and the other end of inductor L2 is electrically connected to one end of inductor L3 and the first pin of the UHF chip 4, respectively. The other end of inductor L3 is grounded.

[0049] Please refer to Figure 2 It also includes resistors R8 and R9. One end of resistor R8 is electrically connected to the third pin of UHF chip 4, and the other end of resistor R8 is electrically connected to the fifth pin of UHF chip 4. One end of resistor R9 is electrically connected to the fourth pin of UHF chip 4, and the other end of resistor R9 is electrically connected to the fifth pin of UHF chip 4.

[0050] Please refer to Figure 3 The main control unit 5 includes a chip U2, which is model CW32L010. The first pin of the chip U2 is electrically connected to the second pin of the UHF chip 4. The second pin of the chip U2 is electrically connected to the third pin of the UHF chip 4. The third pin of the chip U2 is electrically connected to the fourth pin of the UHF chip 4. The fifth pin of the chip U2 is electrically connected to the sixth pin of the UHF chip 4. The eleventh, twelfth, thirteenth, fourteenth, fifteenth and sixteenth pins of the chip U2 are all electrically connected to the electronic paper display unit 6. The ninth pin of the chip U2 is electrically connected to the supercapacitor energy storage unit 2.

[0051] The main control unit 5 also includes capacitors C14, C13, and C4; resistors R5, C12, and R16; MOSFET Q2; resistor R17; MOSFET Q3; and connector J5. For the specific connection relationships between these components, please refer to [reference needed]. Figure 3 .

[0052] Capacitors C12, C13, and C14 are filter capacitors that can remove some voltage interference.

[0053] Resistor R5 pulls up the reset pin of main control unit 5 to ensure its normal operation; capacitor C4 filters the reset pin to prevent interference and false triggering.

[0054] MOSFET Q2 and resistor R16 form the power supply circuit for controlling the display screen.

[0055] MOSFET Q3 and resistor R17 form the power supply circuit for controlling the ultra-high frequency chip unit.

[0056] Connector J5 is the interface for programming the main control unit 5;

[0057] When chip U2 receives a high-level interrupt signal at pin 1, it is awakened and put into operation. Pin 6 of chip U2 controls the power supply of the UHF chip, and then interacts with the UHF chip through pins 2 and 3 of chip U2. Pin 10 of chip U2 controls the power supply of the electronic paper display unit, and then interacts with the electronic paper display unit through pins 11, 12, 13, 14, 15 and 16 of chip U2 to update the display content.

[0058] Please refer to Figure 4 The supercapacitor energy storage unit 2 includes connector J8 and connector J9, each of which is connected to a supercapacitor. Connector J8 is electrically connected to solar photovoltaic unit 1, and connector J9 is electrically connected to both solar photovoltaic unit 1 and J8.

[0059] Please refer to Figure 4 The supercapacitor energy storage unit 2 also includes resistor R14, resistor R12, chip U4, resistor R13, capacitor C16, diode D1 and resistor R15, and the chip U4 is model DW06D;

[0060] The first pin of chip U4 is electrically connected to one end of resistor R12. The other end of resistor R12 is electrically connected to one end of resistor R14 and the second pin of chip U4, and the other end of resistor R12, one end of resistor R14, and the second pin of chip U4 are all grounded. The third pin of chip U4 is electrically connected to the sixth pin of chip U4, one end of resistor R13, solar photovoltaic unit 1, the other end of resistor R14, and connector J9. The fifth pin of chip U4 is electrically connected to the other end of resistor R13 and one end of capacitor C16. The other end of capacitor C16 is electrically connected to the anode of diode D1, one end of resistor R15, connector J8, and solar photovoltaic unit 1. The cathode of diode D1 is electrically connected to the other end of resistor R15 and main control unit 5.

[0061] Please refer to Figure 4 The solar photovoltaic unit 1 includes connector J6 and connector J7, and solar panels are respectively inserted into connector J6 and connector J7. Connector J6 is electrically connected to connector J7, connector J8 and connector J9 respectively.

[0062] Please refer to Figure 4 The solar photovoltaic unit 1 also includes resistor R10, resistor R11, capacitor C15 and chip U3, wherein chip U3 is model DW06D;

[0063] The first pin of chip U3 is electrically connected to one end of resistor R10. The second pin of chip U3 is electrically connected to the other end of resistor R10 and connector J7. The third pin of chip U3 is electrically connected to the sixth pin of chip U3, one end of resistor R11 and supercapacitor energy storage unit 2. The fifth pin of chip U3 is electrically connected to the other end of resistor R11 and one end of capacitor C15. The other end of capacitor C15 is electrically connected to connector J6 and supercapacitor energy storage unit 2.

[0064] Resistor R14 and diode D1D1 are NC, which means they are not soldered and are only reserved for debugging purposes;

[0065] Chip U3, along with resistors R10 and R11, forms an overcharge protection circuit to prevent the solar photovoltaic unit 1 from having a high output voltage and excessive power under strong light conditions, which could damage the downstream supercapacitor energy storage unit.

[0066] Chip U4, together with resistors R12 and R13, forms an over-discharge protection circuit, which can prevent the supercapacitor energy storage unit 2 from continuing to output energy to the back-end circuit when it is almost out of energy, thus causing excessive energy consumption and damage.

[0067] Capacitors C15 and C16 are filter capacitors, which can remove some interference on the voltage.

[0068] Please refer to Figure 5 The electronic paper display unit 6 includes a display chip J4 (i.e., an electronic paper display screen). The display chip J4 is model PV213048. The ninth, tenth, eleventh, twelfth, thirteenth, fourteenth and fifteenth pins of the display chip J4 are all electrically connected to the main control unit 5.

[0069] The electronic paper display unit 6 also includes an inductor L1, a capacitor C1, a diode D2, a diode D3, a capacitor C2, a capacitor C3, a MOSFET Q1, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a resistor R6, a capacitor C10, a resistor R7, a capacitor C11, and a resistor R2. For the specific connection relationships between these components, please refer to [reference needed]. Figure 5 .

[0070] Capacitors C5, C6, C7, C8, C9, C10, and C11 are filter capacitors used to remove some interference on the voltage.

[0071] MOSFET Q1, resistor R6, and resistor R7 form the control loop for the current sensing input.

[0072] Inductor L1, diodes D2, D3, and D4, and capacitors C1, C2, and C3 form the positive and negative gate drive voltage circuit for display chip J4.

[0073] In summary, the passive electronic tag display device provided by this utility model, by setting up a solar photovoltaic unit, a supercapacitor energy storage unit, an ultra-high frequency antenna, an ultra-high frequency chip, a main control unit, and an electronic paper display unit, can support long-distance data updates of several meters through the cooperation of the ultra-high frequency antenna and the ultra-high frequency chip. The content on the electronic tag display screen can be changed remotely by simply carrying a handheld device, thus replacing the existing technology that requires NFC to be placed on the tag to read and update data. The solar photovoltaic unit collects solar energy and stores it in the supercapacitor energy storage unit for later use in powering the main control unit. The ultra-high frequency chip is normally in operation... In standby mode, it consumes no power. When an external handheld device approaches within a few meters, it wirelessly transmits energy to the UHF chip to operate, outputting an interrupt to wake up the main control unit. When the main control unit is awakened, the solar energy stored in the supercapacitor energy storage unit is released to power the main control unit. The main control unit reads the data in the UHF chip that needs to be updated in the electronic paper display unit and controls the update to be displayed on the electronic paper display unit. This not only enables long-distance data transmission but also allows the electronic tag to have a permanent battery life, avoiding the need to use an internal battery to power the electronic tag. This improves the convenience of merchandise management and reduces the management costs of shopping malls.

[0074] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A passive electronic tag display device, characterized in that, It includes a solar photovoltaic unit, a supercapacitor energy storage unit, an ultra-high frequency antenna, an ultra-high frequency chip, a main control unit, and an electronic paper display unit. The main control unit is electrically connected to the supercapacitor energy storage unit, the ultra-high frequency chip, and the electronic paper display unit. The solar photovoltaic unit is electrically connected to the supercapacitor energy storage unit, and the ultra-high frequency antenna is electrically connected to the ultra-high frequency chip.

2. The passive electronic tag display device according to claim 1, characterized in that, The UHF chip is model CAB1. The first pin of the UHF chip is electrically connected to the UHF antenna. The second, third, fourth, fifth and sixth pins of the UHF chip are all electrically connected to the main control unit. The eighth pin of the UHF chip is grounded.

3. The passive electronic tag display device according to claim 2, characterized in that, It also includes inductors L2 and L3. One end of inductor L2 is electrically connected to the UHF antenna, and the other end of inductor L2 is electrically connected to one end of inductor L3 and the first pin of the UHF chip, respectively. The other end of inductor L3 is grounded.

4. The passive electronic tag display device according to claim 2, characterized in that, It also includes resistors R8 and R9. One end of resistor R8 is electrically connected to the third pin of the UHF chip, and the other end of resistor R8 is electrically connected to the fifth pin of the UHF chip. One end of resistor R9 is electrically connected to the fourth pin of the UHF chip, and the other end of resistor R9 is electrically connected to the fifth pin of the UHF chip.

5. The passive electronic tag display device according to claim 1, characterized in that, The main control unit includes a chip U2, model CW32L010. The first pin of the chip U2 is electrically connected to the second pin of the UHF chip, the second pin of the chip U2 is electrically connected to the third pin of the UHF chip, the third pin of the chip U2 is electrically connected to the fourth pin of the UHF chip, the fifth pin of the chip U2 is electrically connected to the sixth pin of the UHF chip, the eleventh, twelfth, thirteenth, fourteenth, fifteenth and sixteenth pins of the chip U2 are all electrically connected to the electronic paper display unit, and the ninth pin of the chip U2 is electrically connected to the supercapacitor energy storage unit.

6. The passive electronic tag display device according to claim 1, characterized in that, The supercapacitor energy storage unit includes connector J8 and connector J9, each of which is connected to a supercapacitor. Connector J8 is electrically connected to a solar photovoltaic unit, and connector J9 is electrically connected to both the solar photovoltaic unit and connector J8.

7. The passive electronic tag display device according to claim 6, characterized in that, The supercapacitor energy storage unit also includes resistor R14, resistor R12, chip U4, resistor R13, capacitor C16, diode D1 and resistor R15, and the chip U4 is model DW06D; The first pin of chip U4 is electrically connected to one end of resistor R12. The other end of resistor R12 is electrically connected to one end of resistor R14 and the second pin of chip U4, and the other end of resistor R12, one end of resistor R14, and the second pin of chip U4 are all grounded. The third pin of chip U4 is electrically connected to the sixth pin of chip U4, one end of resistor R13, the solar photovoltaic unit, the other end of resistor R14, and connector J9. The fifth pin of chip U4 is electrically connected to the other end of resistor R13 and one end of capacitor C16. The other end of capacitor C16 is electrically connected to the anode of diode D1, one end of resistor R15, connector J8, and the solar photovoltaic unit. The cathode of diode D1 is electrically connected to the other end of resistor R15 and the main control unit.

8. The passive electronic tag display device according to claim 1, characterized in that, The solar photovoltaic unit includes connector J6 and connector J7, each of which has a solar panel inserted into it. Connector J6 is electrically connected to connectors J7, J8 and J9 respectively.

9. The passive electronic tag display device according to claim 8, characterized in that, The solar photovoltaic unit also includes resistor R10, resistor R11, capacitor C15 and chip U3, wherein chip U3 is model DW06D; The first pin of chip U3 is electrically connected to one end of resistor R10. The second pin of chip U3 is electrically connected to the other end of resistor R10 and connector J7. The third pin of chip U3 is electrically connected to the sixth pin of chip U3, one end of resistor R11 and supercapacitor energy storage unit. The fifth pin of chip U3 is electrically connected to the other end of resistor R11 and one end of capacitor C15. The other end of capacitor C15 is electrically connected to connector J6 and supercapacitor energy storage unit.

10. The passive electronic tag display device according to claim 1, characterized in that, The electronic paper display unit includes a display chip J4, which is model PV213048. The ninth, tenth, eleventh, twelfth, thirteenth, fourteenth and fifteenth pins of the display chip J4 are all electrically connected to the main control unit.

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