CN111553451B - Passive ink screen electronic price tag based on energy-carrying communication - Google Patents
Passive ink screen electronic price tag based on energy-carrying communication Download PDFInfo
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- CN111553451B CN111553451B CN202010439169.2A CN202010439169A CN111553451B CN 111553451 B CN111553451 B CN 111553451B CN 202010439169 A CN202010439169 A CN 202010439169A CN 111553451 B CN111553451 B CN 111553451B
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- 238000012545 processing Methods 0.000 claims abstract description 17
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
- G06K19/0702—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management the arrangement including a battery
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07701—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction
- G06K19/07703—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual
- G06K19/07707—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual the visual interface being a display, e.g. LCD or electronic ink
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/08—Fastening or securing by means not forming part of the material of the label itself
- G09F3/18—Casings, frames or enclosures for labels
- G09F3/20—Casings, frames or enclosures for labels for adjustable, removable, or interchangeable labels
- G09F3/208—Electronic labels, Labels integrating electronic displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/001—Energy harvesting or scavenging
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
- G09F9/372—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the positions of the elements being controlled by the application of an electric field
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
The invention discloses a passive ink screen electronic price tag based on energy-carrying communication, which comprises a radio frequency rectification module, wherein the radio frequency rectification module is connected with a power management module; the power management module is respectively connected with the power storage module, the threshold matching module, the screen driving module and the data processing module; the data processing module is respectively connected with the communication antenna and the electronic ink screen; the screen driving module is connected with the electronic ink screen. According to the invention, a power supply wire harness or a signal wire harness does not need to be arranged on the electronic price tag, and the electronic price tag can be randomly installed in an energy radiation range, so that non-contact power supply is realized. Each electronic price tag can actively inquire whether the change information exists and replace the existing content with the changed content. The electronic ink screen can realize power-off display, and is convenient for dealing with emergency.
Description
Technical Field
The invention relates to the field of electronic price tags, in particular to a passive ink screen electronic price tag based on energy-carrying communication.
Background
An Electronic price tag, also called an Electronic Shelf Label (ESL), is an Electronic display device with an information transceiving function, and is mainly applied to Electronic tags for displaying price information in supermarkets, convenience stores, pharmacies and the like. The electronic shelf label is placed on a shelf, can replace an electronic display device of the traditional paper price label, is connected with a computer database in a market through a wired or wireless network, and displays the latest commodity information through a screen on the electronic shelf label. The electronic shelf label successfully incorporates the shelf into a computer program in fact, the condition of manually replacing the price label is eliminated, and the price consistency between the cashier desk and the shelf is realized.
However, the existing power supply scheme of the electronic price tag usually adopts two power supply means, namely wired power supply and built-in battery storage, and although the two traditional power supply methods have mature technologies, high power supply efficiency and low cost, the electronic price tag has inherent defects in the aspects of safety, convenience and the like, so that the electronic price tag cannot meet the requirements of social development more and more. The obvious disadvantages are mainly:
1. the requirement on the surrounding environment is high, a wired power supply mode needs complex wiring, wiring connection needs to be repeated when each added terminal is connected, a battery power supply mode needs dry environment, timing replacement is needed due to the problems of battery charging and the service life of the battery, and the service environment is greatly limited, namely the battery is inconvenient to place under the environment condition that the battery is difficult to replace frequently;
2. charging interfaces reserved for different manufacturers of different equipment are different and need to be respectively adapted, and manpower and material resources are wasted.
3. The conventional electronic price tag cannot be normally used after power failure.
Disclosure of Invention
Aiming at the defects in the prior art, the passive ink screen electronic price tag based on the portable communication solves the problem that the existing electronic price tag is greatly limited by the environment.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
the passive ink screen electronic price tag based on energy carrying communication comprises a radio frequency rectification module, wherein the radio frequency rectification module is connected with a power management module; the power management module is respectively connected with the power storage module, the threshold matching module, the screen driving module and the data processing module; the data processing module is respectively connected with the communication antenna and the electronic ink screen; the screen driving module is connected with the electronic ink screen;
the radio frequency rectification module is used for converting radio frequency power in the environment into direct current power and outputting the direct current power;
the threshold matching module is used for setting a starting voltage threshold and a termination voltage threshold of the power storage module, and the auxiliary power supply management module supplies power to the outside;
the screen driving module is used for generating driving voltage of the electronic ink screen;
and the data processing module is used for communicating with the outside and refreshing the display content of the electronic ink screen.
Further, the radio frequency rectification module comprises a radio frequency receiving antenna, a radio frequency matching unit and a rectification circuit which are connected in sequence.
Further, the radio frequency receiving antenna is a 915MHz rod antenna.
Further, the radio frequency matching unit is a T-shaped matching network.
Further, the rectifying circuit comprises a transformer T1, a primary coil of the transformer T1 is connected with the output end of the radio frequency matching unit, and one end of a secondary coil of the transformer T1 is connected with the anode of the diode D1 and the cathode of the diode D2 through a capacitor C4; the cathode of the diode D1 is respectively connected with the other end of the secondary coil of the transformer T1, one end of the capacitor C5 and one end of the resistor R3 and is used as an output end of the radio frequency rectification module; the anode of the diode D2 is connected to the other end of the capacitor C5 and the other end of the resistor R3, respectively, and serves as the other output end of the rf rectifying module.
Further, the power management module comprises a chip U3 with model number BQ25570 RGRR.
Further, the storage module is a super capacitor.
Further, the threshold matching module comprises a resistor R1, a resistor R2, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a resistor R10, wherein one end of the resistor R1 is connected to the VRDIV pin of the chip U3, one end of the resistor R2 and one end of the resistor R4 respectively; the other end of the resistor R2 is respectively connected with a VBAT _ OV pin of the chip U3 and one end of the resistor R5; the other end of the resistor R5 is grounded; the other end of the resistor R1 is respectively connected with an OK _ HYST pin of the chip U3 and one end of the resistor R10; the other end of the resistor R10 is respectively connected with an OK _ PROG pin of the chip U3 and one end of the resistor R6, and the other end of the resistor R6 is grounded; the other end of the resistor R4 is connected to the VOUT _ SET pin of the chip U3 and one end of the resistor R7, and the other end of the resistor R7 is grounded.
Furthermore, the screen driving module comprises an inductor L6, and one end of the inductor L6 is respectively connected with the output end of the power management module, the grounding capacitor C41 and the grounding capacitor C42; the other end of the inductor L6 is respectively connected with the drain of the N-type field effect transistor Q2, the anode of the diode D9 and one end of the capacitor C43; the grid of the N-type field effect transistor Q2 is respectively connected with one end of the resistor R8 and a GDR pin of the electronic ink screen; the source electrode of the N-type field effect transistor Q2 is respectively connected with one end of the resistor R9 and a RESE pin of the electronic ink screen; the other end of the resistor R9 is connected with the other end of the resistor R8 and is grounded;
the cathode of the diode D9 is respectively connected with the grounding capacitor C45 and the PREVGH pin of the electronic ink screen; the other end of the capacitor C43 is respectively connected with the anode of the diode D8 and the cathode of the diode D7, and the cathode of the diode D8 is grounded; the anode of the diode D7 is connected with the grounding capacitor C54 and the GREGVGL pin of the electronic ink screen respectively.
The invention has the beneficial effects that: the invention adopts the electronic ink screen as the display device of the electronic price tag, so that the price tag can be powered off without changing the content, and the invention obtains the electric energy through the radio frequency energy sorting technology, solves the restriction and environmental influence of the power supply wire bundle and is convenient to install and use.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a circuit diagram of a rectifier circuit;
FIG. 3 is a peripheral circuit diagram of a first portion of a power management module;
FIG. 4 is a peripheral circuit diagram of a second portion of the power management module;
fig. 5 is a circuit diagram of the screen driving module.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, the passive ink screen electronic price tag based on energy carrying communication comprises a radio frequency rectification module, wherein the radio frequency rectification module is connected with a power management module; the power management module is respectively connected with the power storage module, the threshold matching module, the screen driving module and the data processing module; the data processing module is respectively connected with the communication antenna and the electronic ink screen; the screen driving module is connected with the electronic ink screen; the radio frequency rectification module is used for converting radio frequency power in the environment into direct current power and outputting the direct current power; the threshold matching module is used for setting a starting voltage threshold and a termination voltage threshold of the power storage module, and the auxiliary power supply management module supplies power to the outside; the screen driving module is used for generating driving voltage of the electronic ink screen; and the data processing module is used for communicating with the outside and refreshing the display content of the electronic ink screen. The radio frequency rectification module comprises a radio frequency receiving antenna, a radio frequency matching unit and a rectification circuit which are connected in sequence. The radio frequency receiving antenna is a 915MHz omnidirectional rod antenna. The radio frequency matching unit is a T-shaped matching network, namely a matching circuit which is formed by three reactance elements and has a T-shaped structure, can also suppress frequencies except the working frequency and has a filtering function.
As shown in fig. 2, the rectifier circuit includes a transformer T1, a primary coil of the transformer T1 is connected to the output terminal of the rf matching unit, and one end of a secondary coil of the transformer T1 is connected to the anode of the diode D1 and the cathode of the diode D2 through a capacitor C4; the cathode of the diode D1 is respectively connected with the other end of the secondary coil of the transformer T1, one end of the capacitor C5 and one end of the resistor R3 and is used as an output end of the radio frequency rectification module; the anode of the diode D2 is connected to the other end of the capacitor C5 and the other end of the resistor R3, respectively, and serves as the other output end of the rf rectifying module. The rectification circuit is a voltage-doubling rectification circuit, in the positive half cycle of a power supply, the upper end of a secondary coil of a transformer T1 is negative, a diode D1 is turned on, a diode D2 is turned off, a capacitor C4 is charged through a diode D1, and the voltage at two ends of a charged capacitor C4 approaches the peak value of the secondary coil of the transformer T1; in a negative half period, the upper end of the secondary coil of the transformer T1 is negative, the lower end of the secondary coil is positive, the diode D1 cuts off the conduction of the diode D2, the capacitor C5 is charged through the diode D2, and the voltage at the two ends of the charged capacitor C5 is close to the sum of the voltage at the two ends of the capacitor C4 and the peak value of the secondary voltage of the transformer T1. Because the resistor R3 and the capacitor C5 are connected in parallel, when the resistor R3 is large enough, the voltage across the resistor R is close to 2 times of the voltage of the secondary coil of the transformer T1, and reaches a voltage doubling rectifying circuit. In specific use, the whole rectifying circuit can be replaced by a voltage-doubling rectifying diode with the model of HSMS-286C.
As shown in fig. 3 and 4, the power management module includes a chip U3 of model BQ25570 RGRR. The storage module is a super capacitor of 22 mF. The threshold matching module comprises a resistor R1, a resistor R2, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a resistor R10, wherein one end of the resistor R1 is respectively connected with a VRDIV pin of the chip U3, one end of the resistor R2 and one end of the resistor R4; the other end of the resistor R2 is respectively connected with a VBAT _ OV pin of the chip U3 and one end of the resistor R5; the other end of the resistor R5 is grounded; the other end of the resistor R1 is respectively connected with an OK _ HYST pin of the chip U3 and one end of the resistor R10; the other end of the resistor R10 is respectively connected with an OK _ PROG pin of the chip U3 and one end of the resistor R6, and the other end of the resistor R6 is grounded; the other end of the resistor R4 is connected to the VOUT _ SET pin of the chip U3 and one end of the resistor R7, and the other end of the resistor R7 is grounded.
The threshold matching module can specifically configure a starting voltage threshold VH and a termination voltage threshold VL of the super capacitor voltage and the output voltage of the power management module through different configuration combinations of 7 resistors, wherein the resistor R2 and the resistor R5 are responsible for configuring the starting voltage threshold VH; the resistor R1, the resistor R10 and the resistor R6 are responsible for the configuration of the termination voltage threshold VL; the resistor R4 and the resistor R7 are responsible for the configuration of the output voltage VOUT. When the voltage of the super capacitor exceeds a starting voltage threshold VH, the super capacitor starts electric energy output; and when the voltage of the super capacitor is lower than a termination voltage threshold VL, the power supply management module terminates the electric energy output of the super capacitor. The relationship between the three voltage values and the resistance is as follows:
VH＝1.5VBIAS×(1+R2/R5)
VL＝VBIAS×(1+R10/R6)
where VBIAS is typically 1.21V, resistor R2 is set to 7.5M Ω, resistor R5 is set to 5.1M Ω, resistor R1 is set to 0.91M Ω, resistor R10 is set to 6.8M Ω, resistor R6 is set to 5.6M Ω, and resistors R4 and R7 are both set to 7.5M Ω. Therefore, the required starting voltage threshold VH is 4.5V, the required termination voltage threshold VL is 2.5V, and the required output voltage VOUT is 3.3V.
As shown in fig. 5, the screen driving module includes an inductor L6, and one end of the inductor L6 is respectively connected to an output terminal of the power management module (in the figure, VCI is a 3.3V dc voltage output by the power management module), a ground capacitor C41, and a ground capacitor C42; the other end of the inductor L6 is respectively connected with the drain of the N-type field effect transistor Q2, the anode of the diode D9 and one end of the capacitor C43; the grid of the N-type field effect transistor Q2 is respectively connected with one end of the resistor R8 and a GDR pin of the electronic ink screen; the source electrode of the N-type field effect transistor Q2 is respectively connected with one end of the resistor R9 and a RESE pin of the electronic ink screen; the other end of the resistor R9 is connected with the other end of the resistor R8 and is grounded; the cathode of the diode D9 is respectively connected with the grounding capacitor C45 and the PREVGH pin of the electronic ink screen; the other end of the capacitor C43 is respectively connected with the anode of the diode D8 and the cathode of the diode D7, and the cathode of the diode D8 is grounded; the anode of the diode D7 is connected with the grounding capacitor C54 and the GREGVGL pin of the electronic ink screen respectively.
In one embodiment of the invention, the energy transmission can select a directional plate-shaped transmitting antenna, the directional transmitting antenna has a conical radiation range, and can effectively cover a shelf with the size of 3 multiplied by 3 cubic meters in the range of 4 meters to 6 meters, and the energy requirement of all electronic price tags on the shelf is met. In order to improve the electronic price tag receiving power and improve the energy transmission efficiency, multi-antenna receiving can be adopted. In practical use, 4 meters of distance are received by 4 antennas, and the average total working time is about 40 seconds, so that the energy charging can be completed within 1 minute in most use scenes.
The data processing module is supplied with energy by the output of the power management module, works by providing a clock signal by an external crystal oscillator, and communicates with the external flash module through the SPI bus to realize the expansion function. The main function of the data processing module is divided into two parts. Firstly, a communication part is adopted, a data processing module sends signals to a base station at regular time through a communication antenna, the base station returns an ACK (acknowledgement character) signal, and the data processing module starts to prepare for refreshing a screen after receiving electronic price tag updating information; meanwhile, the radio frequency signal source generates a signal with fixed frequency, the signal is amplified by the power amplifier and is sent to the space through the sending antenna, and the radio frequency rectification module converts the received electromagnetic wave into direct current electric energy and outputs the direct current electric energy. The other part of the data processing module has a screen refreshing function, after the data processing module confirms that the updating information exists, an electronic ink screen refreshing program is initialized, the power management module is controlled to supply power to the screen driving module and the electronic ink screen, the SPI bus is communicated with the electronic ink screen to update screen display information, and the resetting and refreshing processes of the electronic ink screen are controlled through the resetting pin and the state signal pin.
In summary, the electronic price tag does not need to be provided with a power supply wire harness or a signal wire harness, and can be installed randomly within the energy radiation range, so that non-contact power supply is realized. Each electronic price tag can actively inquire whether the change information exists and replace the existing content with the changed content. The electronic ink screen can realize power-off display, and is convenient for dealing with emergency.
Claims (9)
1. A passive ink screen electronic price tag based on energy-carrying communication is characterized by comprising a radio frequency rectification module, wherein the radio frequency rectification module is connected with a power management module; the power management module is respectively connected with the power storage module, the threshold matching module, the screen driving module and the data processing module; the data processing module is respectively connected with the communication antenna and the electronic ink screen; the screen driving module is connected with the electronic ink screen;
the radio frequency rectification module is used for converting radio frequency power in the environment into direct current power and outputting the direct current power;
the threshold matching module is used for setting a starting voltage threshold and a termination voltage threshold of the power storage module, and the auxiliary power supply management module supplies power to the outside;
the screen driving module is used for generating driving voltage of the electronic ink screen;
and the data processing module is used for communicating with the outside and refreshing the display content of the electronic ink screen.
2. The passive ink screen electronic price tag based on energy-carrying communication of claim 1, wherein the radio frequency rectification module comprises a radio frequency receiving antenna, a radio frequency matching unit and a rectification circuit which are connected in sequence.
3. The passive ink screen electronic price tag based on portable communication of claim 2, wherein the radio frequency receiving antenna is a 915MHz rod antenna.
4. The passive ink screen electronic price tag based on energy carrying communication of claim 2, wherein the radio frequency matching unit is a T-shaped matching network.
5. The passive ink screen electronic price tag based on the portable communication of claim 2, wherein the rectification circuit comprises a transformer T1, the primary coil of the transformer T1 is connected with the output end of the radio frequency matching unit, one end of the secondary coil of the transformer T1 is connected with the anode of a diode D1 and the cathode of a diode D2 through a capacitor C4 respectively; the cathode of the diode D1 is respectively connected with the other end of the secondary coil of the transformer T1, one end of the capacitor C5 and one end of the resistor R3 and is used as an output end of the radio frequency rectification module; and the anode of the diode D2 is connected with the other end of the capacitor C5 and the other end of the resistor R3 respectively and is used as the other output end of the radio frequency rectifying module.
6. The passive ink screen electronic price tag based on portable communication of claim 1, wherein the power management module comprises a chip U3 of model BQ25570 RGRR.
7. The passive ink screen electronic price tag based on portable communication of claim 6, wherein the power storage module is a super capacitor.
8. The passive ink screen electronic price tag based on portable communication of claim 6, wherein the threshold matching module comprises a resistor R1, a resistor R2, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a resistor R10, wherein one end of the resistor R1 is respectively connected with a VRDIV pin of a chip U3, one end of a resistor R2 and one end of a resistor R4; the other end of the resistor R2 is respectively connected with a VBAT _ OV pin of a chip U3 and one end of a resistor R5; the other end of the resistor R5 is grounded; the other end of the resistor R1 is respectively connected with an OK _ HYST pin of a chip U3 and one end of a resistor R10; the other end of the resistor R10 is respectively connected with an OK _ PROG pin of a chip U3 and one end of a resistor R6, and the other end of the resistor R6 is grounded; the other end of the resistor R4 is connected to the VOUT _ SET pin of the chip U3 and one end of the resistor R7, and the other end of the resistor R7 is grounded.
9. The passive ink screen electronic price tag based on the portable communication of claim 1, wherein the screen driving module comprises an inductor L6, one end of the inductor L6 is connected with the output end of the power management module, a grounding capacitor C41 and a grounding capacitor C42 respectively; the other end of the inductor L6 is respectively connected with the drain electrode of the N-type field effect transistor Q2, the anode of the diode D9 and one end of the capacitor C43; the grid of the N-type field effect transistor Q2 is respectively connected with one end of the resistor R8 and a GDR pin of the electronic ink screen; the source electrode of the N-type field effect transistor Q2 is respectively connected with one end of a resistor R9 and a RESE pin of the electronic ink screen; the other end of the resistor R9 is connected with the other end of the resistor R8 and is grounded;
the cathode of the diode D9 is respectively connected with a grounding capacitor C45 and a PREVGH pin of the electronic ink screen; the other end of the capacitor C43 is respectively connected with the anode of a diode D8 and the cathode of a diode D7, and the cathode of the diode D8 is grounded; the anode of the diode D7 is respectively connected with a grounding capacitor C54 and a GREGVGL pin of the electronic ink screen.
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