WO2011031095A2 - Apparatus and method for reader-based energy pumping and thin film battery integral type semi-passive tag - Google Patents

Apparatus and method for reader-based energy pumping and thin film battery integral type semi-passive tag Download PDF

Info

Publication number
WO2011031095A2
WO2011031095A2 PCT/KR2010/006187 KR2010006187W WO2011031095A2 WO 2011031095 A2 WO2011031095 A2 WO 2011031095A2 KR 2010006187 W KR2010006187 W KR 2010006187W WO 2011031095 A2 WO2011031095 A2 WO 2011031095A2
Authority
WO
WIPO (PCT)
Prior art keywords
tag
signal
reader
module
thin film
Prior art date
Application number
PCT/KR2010/006187
Other languages
French (fr)
Other versions
WO2011031095A3 (en
Inventor
Youngbin Cho
Original Assignee
Lg Innotek Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020090085189A external-priority patent/KR101086563B1/en
Priority claimed from KR1020090107722A external-priority patent/KR101617459B1/en
Application filed by Lg Innotek Co., Ltd. filed Critical Lg Innotek Co., Ltd.
Publication of WO2011031095A2 publication Critical patent/WO2011031095A2/en
Publication of WO2011031095A3 publication Critical patent/WO2011031095A3/en

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • 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
    • 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
    • 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
    • G06K19/0715—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 means to regulate power transfer to the integrated circuit
    • 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
    • G06K19/0723—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 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs

Definitions

  • the invention relates to an apparatus and a method for pumping energy in a reader operative to pump out energy transmitted by a reader to a tag, and a semi-passive tag integral with a thin film battery charging energy transmitted by a reader into a thin film battery as well as operating using the charged power of the thin film battery.
  • a RFID (Radio Frequency Identification) system refers to a contactless recognition system wirelessly transferring and processing object information and surrounding environment information.
  • the RFID system is also called a radio frequency identification system.
  • the RFID system is composed of a tag storing given information and a reader having a reading function of given information stored in the tag.
  • the tag is comprised of a transponder chip and an antenna manufactured in semiconductor.
  • An electronic wave identification technology used in an RFID system is advantageous in that it requires no direct contact unlike a barcode or a scan within a visible light band. Due to such a benefit, an RFID system is evaluated as a system possibly replacing a barcode system, and have a prospect that its useable scope will continuously expand.
  • the tag is divided into a passive tag and an active tag according to an operation characteristic.
  • the passive tag is not provided with a separate electric cell in its inner part, and is supplied energy for operation via a CW (Continuous Wave) signal transmitted by a reader.
  • the active tag has an electronic cell embedded to operate unaidedly.
  • a reader when a reader recognizes a tag, a reader transmits a CW signal and a modulation signal modulated from a command.
  • the tag receives a CW signal transmitted by the reader and generates energy, and operates by the generated energy. And, the tag transmits given information pre-stored of its own according to a command of the modulation signal.
  • a first reader sequentially transmits a CW signal and a command-modulated modulation signal to recognize a tag
  • a second reader transmits a CW signal and a modulation signal in a sequential way.
  • the CW signal and modulation signal transmitted from the first reader and the CW signal and modulation signals from the second reader may act as an interference signal to each other.
  • the first reader and the second readers all fail to detect any tags.
  • a first reader searches a tag and collects a piece of information stored in the tag while other second readers are designed not to transmit a CW signal and modulation signals.
  • the first reader searches a tag to collect information stored in the tag while a plurality of second readers designed unable to output a signal
  • the first reader can smoothly detect information on a tag situated at an adjacent position.
  • the tag may not produce sufficient energy because of weakness of the intensity of a CW signal transmitted by the first reader, and due to this fact, the first reader fails to accurately recognize tag information.
  • an active tag operates using the embedded power of an electronic cell.
  • the active-type tag cannot be supplied with an operating power, thereby failing to operate.
  • the present invention provides an energy pumping apparatus and method of supplying sufficient energy for a tag by transmitting a CW signal to search the tag by a first reader while a plurality of second readers transmits a CW signal in synchronous to the first reader in an RFID system equipped with a plurality of readers.
  • the present invention provides an energy pumping apparatus and method, wherein in a case a first reader transmits a CW signal to search a tag, a plurality of second readers determine a power of the CW signal transmitted from the first reader to the tag and thus in a case the first reader is situated too far-away to provide sufficient power to the tag, the plurality of second readers supply sufficient energy for the tag by transmitting a CW signal in synchronous to the first reader.
  • the present invention provides an energy pumping apparatus and method to prevent the breakage of a tag or retrieval unavailability of tag information due to an excessive energy transmission to the tag by determining the intensity of energy supplied into the tag and adjusting the power of a CW signal transmitted to the tag based on the determined intensity of energy by a first reader that retrieves the tag information.
  • the present invention provides a thin film battery integral type semi-passive tag integrally having a thin film battery to charge reader-transmitted energy into the thin film battery, and operating using the charged power of the thin film battery.
  • the present invention provides a thin film battery integral type semi-passive tag with a possibility of enhancing spatial efficiencies.
  • An energy pumping apparatus of the present invention includes a reader controller recognizing a tag and controlling an action of reading a piece of information stored in the recognized tag, a RFID (Radio Frequency Identification) reader module producing a CW (Continuous Wave) signal and supplying energy into the tag, based on a control of the reader controller, to recognize the tag and read information stored in the tag, and an SSB (Spectrum Scanning Board) module detecting an RSSI (Received Signal Strength Indicator) of a CW signal transmitted to the tag and providing the detected RSSI to the reader controller.
  • RFID Radio Frequency Identification
  • CW Continuous Wave
  • SSB Spectrum Scanning Board
  • the SSB module includes a directional coupler receiving signals received by the RFID reader module and the tag, a RSSI detector detecting an RSSI of signals received by the directional coupler, and an SSB controller providing an RSSI detected by the RSSI detector to the reader controller.
  • the SSB module includes a PLL circuit generating a local oscillating signal, a mixer generating an IF(Intermediate Frequency) signal by mixing an output signal of the directional coupler and an output signal of the PLL circuit, and an IF (Intermediate Frequency) processor generating signals of I (In-phas) channel and Q (Quadrature-phase) channel by processing an IF signal generated in the mixer, and outputting the generated signals of I channel and Q channel to the SSB controller, wherein the SSB controller reads out a signal transmitted from the RFID reader module and a signal transmitted from the tag using signals of the I channel and Q channel to provide the reading result to the reader controller.
  • IF Intermediate Frequency
  • a variable amplifier amplifying an output signal of the directional coupler and outputting it to the mixer may be included between the directional coupler and the mixer where an amplifying ratio varies in response to a gain control signal produced by the SSB controller.
  • An energy pumping method of the present invention includes determining if a signal transmitted to a tag by a second RFID reader module of a second reader that reads tag information has been detected by monitoring a received signal of a first SSB (Spectrum Scanning Board) module by a first reader controller provided at a first reader that does not read tag information, determining if a detected signal is a CW (Continuous Wave) signal, in a case a signal transmitted to the tag by the second RFID reader module is detected, and pumping energy supplied to the tag by transmitting a CW signal by a first RFID reader module according to a control of the first reader controller in a case the detected signal is a CW signal.
  • SSB Spectrum Scanning Board
  • Pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module includes discriminating power of the CW (Continuous Wave) signal transmitted to the tag from the second RFID reader module by monitoring a received signal of the first SSB module by a first reader controller, and transmitting a CW signal by the first RFID reader module to pump energy supplied into a tag in a case the discriminated power is lower than a predetermined reference power.
  • CW Continuous Wave
  • the method After pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module, the method includes determining if a signal transmitted from a tag has ended by monitoring a received signal of the first SSB module by the first reader controller, and terminating the transmission of the CW signal by the first RFID reader module according to a control of the first reader controller in a case a signal transmitted from the tag is ended.
  • the method After pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module, the method includes determining if a signal transmitted from a tag is detected by monitoring a received signal of the first SSB module by the first reader controller, and counting errors in a case a signal transmitted from the tag has not been detected over a set time.
  • Pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module includes discriminating power of a CW signal transmitted to the tag from the first RFID reader module and the second RFID reader module by monitoring a received signal of a second SSB module by a second reader controller provided at the second reader that reads tag information, and transmitting the CW signal of a lowered power level by the second RFID reader module in a case the discriminated power is over a predetermined reference power.
  • an energy pumping method of the present invention includes transmitting a search signal by the first RFID module according to a control of the first reader controller and deciding a power level by determining an RSSI received from the first SSB module in a case the first reader reads tag information, and transmitting a signal with the determined power level to the first RFID reader module and performing a tag recognition and a tag information reading.
  • Transmitting the search signal includes setting a channel for reading tag information and determining whether the set channel is used or not by monitoring a received signal of the first SSB module, by the reader controller, altering a channel in a case the set channel is used and repeatedly determining whether the set channel is used or not by monitoring a received signal of the first SSB module, and transmitting a search signal through the set channel in a case the set channel is not used.
  • a thin film battery integral type semi-passive tag of the present invention includes a base film, a thin film battery stack film formed on the upper part of the base film, an antenna-purpose conductive paste film formed on the upper part of the thin film battery stack film, and an RFID (Radio-Frequency IDentification) tag chip connected to each of the thin film battery stack film and the antenna-purpose conductive paste film.
  • An insulating layer is interposed between the thin film battery stacked film and the antenna-purpose conductive paste film.
  • the antenna-purpose conductive paste film is a paste film containing Ag.
  • a thin film battery integral type semi-passive tag of the present invention includes a base film, a first thin film battery formed on the upper part of the base film, a first antenna formed on the upper part of the first thin film battery, a second thin film battery separated from the first thin film battery and formed on the upper part of the base film, a second antenna formed on the upper part of the second thin film battery, and an RFID tag chip electronically connected to the first and second thin film battery and the first and second antenna.
  • Each of the first thin film battery and the second thin film battery is comprised of a first conductive layer, a metal oxidant film, an electrolyte, a metal oxidant film, and a second conductive layer on the upper part of the base film.
  • An insulating layer is formed on the upper part of the second conductive layer and the first antenna and the second antenna are conductive paste films formed on the upper part of the insulating layer.
  • the electrolyte is a chargeable polymer electrolyte.
  • the electrolyte is a solid state or a gel state.
  • Each of the first conductive layer, a metal oxide film, an electrolyte, a metal oxide film, the second conductive layer, the insulating layer and the conductive paste film is a sequentially printed layer on the upper part of the base film.
  • one first reader transmits a CW and reads information stored in a tag while a plurality of readers not reading information from any tag transmits their own CW signals in synchronous to the CW signal transmitted by the first reader.
  • a thin film battery integral type semi-passive tag charges reader-transmitted energy into a thin film battery by integrally providing a thin film battery, and operates using a power charged in the thin battery.
  • an antenna-purpose conductive paste film can be formed on the upper part of a thin film battery stacked film, thereby enhancing the spatial efficiency of a battery and an antenna.
  • a thin film battery and an antenna can be simply stacked on the upper part of a base film by performing a printing process, thereby realizing a battery and an antenna in one process and achieving the simplification of a manufacturing process.
  • FIG. 1 is a block diagram showing a construction of a preferred embodiment of readers according to an energy pumping apparatus of the invention
  • FIG. 2 is a block diagram showing a construction of a preferred embodiment of an SSB module in an energy pumping apparatus of the invention
  • FIGs. 3 and 4 are flowcharts showing an operation of a preferred embodiment of an energy pumping method of the invention
  • FIG. 5 is a cross-section view showing a schematic construction of a preferred embodiment of a thin film battery integral type semi-passive tag of the invention
  • FIG. 6 is a cross-section view showing a schematic construction of a preferred embodiment of a thin film battery in a thin film battery integral type semi-passive tag of the invention
  • FIG. 7 is a cross-section view schematically showing a construction of another preferred embodiment according to a thin film battery integral type semi-passive tag of the invention.
  • FIG. 8 is a cross-section view showing a schematic construction to describe a thin film battery integral type semi-passive tag having a dipole antenna according to an embodiment of the invention
  • FIG. 9 is a perspective view schematically showing a construction of a preferred embodiment of a dipole antenna in a thin film battery integral type semi-passive tag
  • FIG. 10 is a diagram showing a schematic construction of a preferred embodiment to describe an RFID tag chip and dipole antenna electrically-connected state in a thin film battery integral type semi-passive tag of the present invention.
  • FIG. 11 is a schematic diagram to describe a construction of a preferred embodiment of a state of an RFID tag chip electrically connected to a battery and a dipole antenna in a thin film battery integral type semi-passive tag of the present invention.
  • FIG. 1 is a block diagram showing a construction of readers according to an energy pumping apparatus of the invention.
  • a symbol 100; 100-1, 100-2, 100-3, ...) refers to a plurality of readers.
  • Each of the plurality of readers 100 includes a reader controller (102; 102-1, 102-2, 102-3, ...), an RFID reader module (104; 104-1, 104-2, 104-3, ...), and an SSB (Spectrum Scanning Board) module (106; 106-1, 106-2, 106-3, ).
  • SSB Spectrum Scanning Board
  • the reader controller 102 recognizes a tag (not shown in the figure) by controlling the RFID reader module 104. Also, in a case of not recognizing a tag, the reader controller 102 controls that the RFID reader module 104 may transmit a CW signal according to an output signal of the SSB module 106 to pump out energy supplied to a tag.
  • the RFID reader module 104 transmits a CW signal and a command modulated modulation signal and recognizes a tag, and reads a piece of given information stored in a tag. Also, in a case the RFID reader module 104 does not read given information stored in a tag, it transmits a CW signal according to a control of the reader controller 102 in order to pump energy supplied to the tag.
  • the SSB module 106 detects transferred information between the RFID reader module 104 and the tag interactively. Also, the SSB module 106 detects an RSSI (Received Signal Strength Indicator) of a CW signal transmitted by the RFID reader module 104 and provides the detected RSSI to the reader controller 102, so that the reader controller 102 controls that the reader controller 102 controls that the RFID reader module 104 may transmit a CW signal.
  • RSSI Received Signal Strength Indicator
  • a reader controller 102 controls an RFID reader module 104 to transmit a search signal in the case of recognizing a tag and reading given information stored in a recognized tag.
  • a RFID reader module 104-1 transmits a search signal according to a control of a reader controller 102-1.
  • the RFID reader module 104-1 When a tag makes a response to a search signal transmitted by the RFID reader module 104-1 of the first reader 100-1, the RFID reader module 104-1 reads given information transferred by the tag while transmitting a CW signal and supplying energy to the tag.
  • SSB modules 106-2, 106-3, ... equipped in each of second readers 100-2, 100-3, ... not to read given information stored in a tag receive a CW signal transmitted by an RFID reader module 104-1 of the first reader 100-1 to detect an RSSI (Receive Signal Strength Indicator). Using the detected RSSI, reader controllers 102-2, 102-3, ... of second readers 100-2, 100-3, ... determine if a power intensity transmitted to the tag is lower than a predetermined reference electric power.
  • RSSI Receiveive Signal Strength Indicator
  • an SSB module 106-1 receives a CW signal to detect an RSSI, and a reader controller 102-1 determines the intensity of a power transmitted to a tag by the detected RSSI. And, the reader controller 102-1 decides a power level of an RFID reader module 104-1 according to the determined power, and by the decided power level, the RFID reader module 104-1 communicates with a tag and reads tag information.
  • the SSB module 106 includes a directional coupler 200, an RSSI detecting part 210, a variable amplifier 220, a PLL (Phase Locked Loop) circuit 230, a mixer 240, an IF (Intermediate Frequency) signal processing part 250, and an SSB (Spectrum Scanning Board) controller 260.
  • the directional coupler 200 receives signals transmitted by the RFID reader module 104 and a tag.
  • the RSSI detector 210 detects an RSSI (Received Signal Strength Indicator) of signals received by the directional coupler 200 and outputs it to the SSB controller 260.
  • RSSI Received Signal Strength Indicator
  • the variable amplifier 220 amplifies the received signal of the directional coupler 200 while varying an amplifying ratio according to a gain control signal provided by the SSB controller 260.
  • the PLL circuit 230 generates a local oscillating signal of a given frequency under a control of the SSB controller 260.
  • the mixer 240 transforms an output signal of the variable amplifier 220 into an IF (Intermediate Frequency) signal by mixing it with a local oscillating signal of the PLL circuit 230.
  • IF Intermediate Frequency
  • the IF signal processing part 250 produces a baseband signal of an I (In-phase) channel and a Q (Quadrature-phase) channel by processing the IF signal generated by the mixer 240.
  • the SSB controller 260 generates a gain control signal according to an RSSI detected by the RSSI detecting part 210 to adjust an amplifying ratio of the variable amplifier 220. Also, the SSB controller 260 controls the PLL circuit 230 to produce a local oscillating signal, reads the RFID reader module 104 transmitting signal and the tag transmitting signals using an I channel and a Q channel generated by the IF signal processing part 250, and tells the reading result to the reader controller 102.
  • the directional coupler 200 receives the RFID reader module 104 transmitting signal and the tag transmitting signal, and outputs the received signal to the variable amplifier 220.
  • an RSSI detecting part 210 detects out an RSSI of the signal received by the directional coupler 200, and outputs the detected RSSI to an SSB controller 260.
  • the SSB controller 260 transmits the RSSI to the reader controller 102. Then, the reader controller 102 may determine energy supplied to the tag using the RSSI.
  • the SSB controller 260 produces a gain control signal according to the RSSI, and the produced gain control signal may be applied to a variable amplifier 220 to adjust an amplifying ratio of the variable amplifier 220.
  • a signal received by the directional coupler 200 may be outputted with a certain intensity by a varying amplification through the variable amplifier 220, and an output signal of the variable amplifier 220 may be input to a mixer 240.
  • the SSB controller 260 controls a PLL circuit 240 to generate a local oscillating signal, and a local oscillating signal generated by the PLL circuit 240 may be input to the mixer 240.
  • the mixer 240 mixes a local oscillating signal of the PLL circuit 230 to the output signal of the variable amplifier 220 to produce an IF signal, and the produced IF signal may be processed in the IF signal processing part 250 to generate I-channel and Q-channel signals, and the generated I channel and Q channel signals may be input to the SSB controller 260.
  • the SSB controller 260 reads the RFID reader module 104 transmitting signal and the tag transmitting signal using the I-channel and Q-channel input from the IF signal processing part 250, and tell the reader controller 102 of a reading result.
  • the reader controller 102 can discriminate channels through which current readers 100-1, 100-2, 100-3, ... communicate with a tag.
  • FIGS. 3 and 4 are flowcharts showing the operation of a reader controller 102 according to an energy pumping method of the present invention.
  • a reader controller 102 determines whether to search a tag or not (S300).
  • a reader controller 102-1 provided in a first reader 100-1 operates an RFID module 104-1 to determine whether to retrieve a tag or not.
  • a reader controller 102-1 sets a channel for a tag retrieval (S302), and determines whether the set channel is used or not monitoring a received signal of an SSB module 106-1 (S304, S306). For example, the reader controller 102-1 determines if a plurality of other second readers 100-2, 100-3, ... besides a first reader 100-1 uses the set channel to search a tag.
  • the reader controller 102-1 changes a channel for a tag search (S308), and returns to the step S304 and repeatedly performs the operation of monitoring a received signal of an SSB module 106-1 and as a monitoring result determining if the set channel is used or not.
  • the reader controller 102-1 transmits a search signal to a frequency of the set channel and retrieves a tag controlling an RFID control module 104-1 (S310).
  • the reader controller 102-1 determines an RSSI (Received Signal Strength Indicator) of an SSB module 106-1 receiving signal (S312). That is, the SSB module 106-1 receives a signal of the set channel frequency and detects an RSSI, and the reader controller 102-1 determines the intensity of an RSSI detected by the SSB module 106-1. And, the reader controller 102-1 decides a power level of a signal delivered by the RFID reader module 104-1 based on the determined RSSI (S314).
  • RSSI Receiveived Signal Strength Indicator
  • the RFID reader module 104-1 recognizes a tag and collects a piece of information stored in the tag by performing a tag recognition and tag information collecting algorithm using the decided power level according to a control of the reader controller 102-1 (S316).
  • the reader controller 102-1 determines if an entire tag search has completed (S318).
  • the reader controller 102-1 returns to the step (S310), controls that the RFID reader module 104-1 transmit a search signal, decides a power level by the determination of an RSSI, performs a tag recognition and tag information collecting algorithm using the decided power level to recognize a tag, and repeatedly performs an operation of collecting information stored in the tag.
  • the reader controller 102-1 ends a tag search operation.
  • the reader controller 102-1 monitors a received signal of an SSB module 106-1 as shown in FIG. 4 (S400). That is, the reader controller 102-1 monitors if RFID reader modules 104-2, 104-3, ... of second readers 100-2, 100-3, ... transmit a given signal to retrieve tag information through a received signal of an SSB module 106-1.
  • the controller determines as a result of monitoring whether RFID reader modules 104-2, 104-3, ... transmit a predetermined signal (S402), and in a case RFID reader modules 104-2, 104-3, ... transmit the predetermined signal, determines whether the predetermined signal is a CW signal for supplying energy to a tag (S404).
  • the reader controller 102-1 determines the power of the CW signal through an RSSI detected by an RSSI detecting part 210 of the SSB module 106-1, and determines if the determined CW signal is lower than a predetermined reference electric power (S406).
  • the reader controller 102-1 has pre-set a reference electric power according to an RSSI if the CW signal supplies sufficient energy to the tag.
  • the reader controller 102-1 determines if a power of the CW signal determined by an RSSI detected by an RSSI detecting part 210 of the SSB module 106-1 is lower than a predetermined reference power.
  • the reader controller 102-1 ends its operation without performing an energy pumping action.
  • the reader controller 102-1 transmits a CW signal (S408) and monitors a received signal of an SSB module (S410) controlling the RFID reader module 104-1.
  • the reader controller 102-1 returns to the step (S408) and repeatedly performs an operation of transmitting the CW signal and monitoring a received signal of the SSB module 106-1 and determining if the tag signal has ended.
  • the reader controller 102-1 stops a CW signal transmission (S416), and ends an energy pumping action.
  • the reader controller 102-1 determines if a set time has elapsed (S418), and if a set time has not elapsed, flow reverts to the step (S410) and monitors a received signal of an SSB module and repeatedly performs an operation of determining whether a tag signal is detected or not.
  • the reader controller 102-1 In such a state, if a tag signal has not been detected by a predetermined time elapses, the reader controller 102-1 counts errors, stops the CW signal (S416), and ends an energy pumping action.
  • a manager managing an RFID system can detect a poor tag or change Q value of a collision avoidance algorithm, and possibly determine the efficiency of an RFID system preferably employed for a management of the RFID system.
  • FIG. 5 is a cross-sectional view showing a schematic construction of a preferred embodiment according to a thin film battery integral type semi-passive tag of the present invention.
  • the present invention includes a base film 500, a thin film battery stack film 510 formed on the upper part of the base film 500, an antenna-purpose conductive paste film 530 formed on the upper part of the thin film battery stack film 510, and an RFID (Radio-Frequency IDentification) tag chip connected to the thin film battery stack film 510 and the antenna-purpose conductive paste film 530 each.
  • RFID Radio-Frequency IDentification
  • the conductive paste film 530 may be a paste film containing Ag.
  • An insulating layer 520 is interposed between the thin film battery stacked film 510 and the antenna-purpose conductive paste film 530. That is, in order to prevent the thin film battery stacked film 510 and the antenna-purpose conductive paste film 530 from being electrically short, an insulating layer 520 is interposed.
  • the conductive paste film 530 refers to an antenna of a semi-passive tag. To highlight technical characteristics of the present invention, a RFID tag chip has not been depicted in the drawing of FIG. 5.
  • the conductive pasted film 530 of FIG. 5 is not partitioned but formed of a single film, it can be utilized as a thin film battery integral type semi-passive tag having a monopole antenna.
  • a thin film battery integral type semi-passive tag of the present invention since a thin film battery integral type semi-passive tag of the present invention has formed an antenna-purpose paste film 530 on the upper part of the thin film battery stacked film 510, it has a benefit of enhancing a spatial efficiency of a battery and an antenna.
  • FIG. 6 is a cross-sectional view showing a schematic construction of a preferred embodiment according to a thin film battery integral type semi-passive tag of the present invention.
  • a thin film battery of the invention includes a first conductive layer 600 as a thin film battery stacked film 510, for example, an electrolyte 610 stacked on the upper part of the first conductive layer 600, and a second conductive layer 620 on the upper part of the electrolyte 610.
  • a thin film battery of the invention can be realized as several types of structures besides the above-described structure.
  • the first conductive layer 600 and second conductive layer 620 may be electrodes each having an opposite polarity.
  • the second conductive layer 620 is a cathode.
  • the second conductive layer 620 is an anode.
  • the electrolyte 610 may be a chargeable polymer electrolyte of a solid state or a gel state. Therefore, the possibility of a leakage occurrence can be ruled out that is a disadvantage of a liquid electrolyte.
  • FIG. 7 is a cross-sectional view schematically showing a construction of another preferred embodiment according to a thin film battery integral type semi-passive tag of the present invention.
  • a thin film battery integral type semi-passive tag of the present invention has a base film 500.
  • a first conductive layer 600, a metal oxide film 700, an electrolyte 610, a metal oxide film 710, a second conductive layer 620, an insulating layer 520 and a conductive paste film 530 may be sequentially printed.
  • the first conductive layer 600, the metal oxide film 700, the electrolyte 610, the metal oxide film 710 and the second conductive layer 620 may be the thin film battery stacked film 510, and the conductive paste film 530 may be an antenna.
  • An RFID tag chip may be electrically connected into the thin film battery stacked film 510 and the antenna-purpose conductive paste film 530.
  • the present invention simply stacks a thin film battery and an antenna on the upper part of a base film 500 by performing a printed process, thereby bearing a benefit of realizing a battery and an antenna in one process and achieving the simplification of a manufacturing process.
  • FIG. 8 is a cross-sectional view showing a schematic construction to describe a thin film battery integral type semi-passive tag having a dipole antenna according to an embodiment of the invention.
  • An embodiment of FIG. 8 refers to a thin film battery integral type semi-passive tag having a dipole antenna that means 2 antennas, including a base film 500, a first thin film battery 800 stacked on the upper part of the base film 500, a first antenna 810 stacked on the upper part of the first thin film battery 800, a second thin film battery 802 distanced from the first thin film battery and stacked on the upper part of the base film 500, a second antenna 812 stacked on the upper part of the second thin film battery 802, and an RFID tag chip 820 electrically connected to the first thin film battery 800, the second thin film battery 802, the first antenna 810 and the second antenna 820.
  • first thin film battery 800 and the first antenna 810 may be stacked on the upper part of the base film 500 by a sequential printing process.
  • second thin film battery 802 and the second antenna 812 may be stacked in an area of the base film 500 separated from the first thin film battery 800 formed area by a sequential printing process.
  • the first antenna 810 and the second antenna 812 may be separated from each presence, and the first thin film battery 800 and the second thin film battery 802 may be formed at the lower part of each of the first antenna 810 and the second antenna 812. Therefore, the present invention can enhance a spatial efficiency compared to a tag including a battery and an antenna at a separate area.
  • FIG. 10 is a diagram showing a schematic construction of a preferred embodiment to describe an RFID tag chip and dipole antenna electrically connected state in a thin film battery integral type semi-passive tag of the invention.
  • a second electrode pad 1002 and a third electrode pad 1004 connected to batteries may be formed, and also at the RFID tag chip 820, a first electrode pad 1000 and a fourth electrode pad 1004 connected to a first antenna 810 and a second antenna 812 may be formed.
  • a method of electrically connecting a first to fourth electrode pads 1000, 1002, 1004, 1006 formed at the RFID tag chip 820 to the batteries, the first antenna 810 and the second antenna 812 may be performed in a variety way.
  • a process of stacking the batteries, the first antenna 810 and the second antenna 812 on a base film 500 is performed. And, a process of electrically connecting a first to fourth electrode pads 1000, 1002, 1004, 1006 of the RFID tag chip to the batteries and the first antenna 810 and the second antenna 812 while mounting the RFID tag chip 820 on the upper part of the base film 500 may be performed.
  • a process of stacking the batteries, the first antenna 810 and the second antenna 812 on a base film 500 is performed. And, a process of electrically connecting a first to fourth electrode pads 1000, 1002, 1004, 1006 of the RFID tag chip to the batteries and the first antenna 810 and the second antenna 812 after mounting the RFID tag chip 820 on the upper part of the base film 500 may be performed.
  • FIG. 11 is a schematic diagram to describe a construction of a preferred embodiment of a state of an RFID tag chip electrically connected to a battery and an antenna in a thin film battery integral type semi-passive tag of the present invention.
  • a technology of electrically connecting an RFID tag chip to a battery and an antenna may be applied to all thin film battery integral type semi-passive tag having a monopole antenna or a dipole antenna.
  • FIG. 11 shows a structure of one antenna 1100 and batteries provided at the lower part of the antenna 1100.
  • a first electrode pad 1000 of an RFID tag chip 820 is electrically connected to an antenna 1100, and each of a second electrode pad 1002 and a third electrode pad 1003 is electrically connected to a first conductive layer 600 and a second conductive layer 620 of a battery.
  • electrode lines 1110, 1112 for electrically connecting the first conductive layer 600 and the second conductive layer 620 of the battery to the second electrode pad 1002 and the third electrode pad 1004 respectively may be provided.
  • the antenna 1100 is provided with an extended part contacting the first electrode pad 1000 of the RFID tag chip 820, and this extended part may be configured to flip-chip bond to the first electrode pad 1000 of the RFID tag chip 820 by a bump.
  • a partial area of the first conductive layer 600 and the second conductive layer 610 may be exposed, and the exposed area may be provided with pads 1120, 1122 configured to electrically connect to the electrode lines 1110, 1112.

Abstract

Disclosed herein is an energy pumping apparatus and method of pumping energy supplied to a tag in an RFID system equipped with a plurality of readers, wherein in a case a first reader transmits a CW(Continuous Wave) signal to search a tag, other readers determine a power of the CW signal transmitted from the first reader to the tag and thus in a case the detected power is below a reference power, other readers transmit a CW signal to supply sufficient energy for the tag to smoothly detect information stored in the tag, and a thin film battery integral type semi-passive tag includes a base film, a thin film battery stack film, an antenna-purpose conductive paste film, and an RFID (Radio-Frequency IDentification) tag chip connected to each of the thin film battery stack film and the antenna-purpose conductive paste film.

Description

APPARATUS AND METHOD FOR READER-BASED ENERGY PUMPING AND THIN FILM BATTERY INTEGRAL TYPE SEMI-PASSIVE TAG
The invention relates to an apparatus and a method for pumping energy in a reader operative to pump out energy transmitted by a reader to a tag, and a semi-passive tag integral with a thin film battery charging energy transmitted by a reader into a thin film battery as well as operating using the charged power of the thin film battery.
A RFID (Radio Frequency Identification) system refers to a contactless recognition system wirelessly transferring and processing object information and surrounding environment information. The RFID system is also called a radio frequency identification system.
The RFID system is composed of a tag storing given information and a reader having a reading function of given information stored in the tag. The tag is comprised of a transponder chip and an antenna manufactured in semiconductor.
An electronic wave identification technology used in an RFID system is advantageous in that it requires no direct contact unlike a barcode or a scan within a visible light band. Due to such a benefit, an RFID system is evaluated as a system possibly replacing a barcode system, and have a prospect that its useable scope will continuously expand.
The tag is divided into a passive tag and an active tag according to an operation characteristic. The passive tag is not provided with a separate electric cell in its inner part, and is supplied energy for operation via a CW (Continuous Wave) signal transmitted by a reader. The active tag has an electronic cell embedded to operate unaidedly.
In such an RFID system, when a reader recognizes a tag, a reader transmits a CW signal and a modulation signal modulated from a command. The tag receives a CW signal transmitted by the reader and generates energy, and operates by the generated energy. And, the tag transmits given information pre-stored of its own according to a command of the modulation signal.
In an RFID system having a plurality of readers, for example, a first reader sequentially transmits a CW signal and a command-modulated modulation signal to recognize a tag, and also a second reader transmits a CW signal and a modulation signal in a sequential way.
In this case, if a first reader originated CW signal and modulation signal is ill-timed with a second reader originated CW signal and modulation signal, the CW signal and modulation signal transmitted from the first reader and the CW signal and modulation signals from the second reader may act as an interference signal to each other. In a case such an interference signal takes place, the first reader and the second readers all fail to detect any tags.
Thus, in order to reduce interferences between readers in an environment a plurality of readers are installed, a first reader searches a tag and collects a piece of information stored in the tag while other second readers are designed not to transmit a CW signal and modulation signals.
If the first reader searches a tag to collect information stored in the tag while a plurality of second readers designed unable to output a signal, the first reader can smoothly detect information on a tag situated at an adjacent position. However, in the case of a tag considerably far away distanced form the first reader, the tag may not produce sufficient energy because of weakness of the intensity of a CW signal transmitted by the first reader, and due to this fact, the first reader fails to accurately recognize tag information.
On the other hand, an active tag operates using the embedded power of an electronic cell. However, in a case the power of an electronic cell is all exhausted, the active-type tag cannot be supplied with an operating power, thereby failing to operate.
Therefore, the present invention provides an energy pumping apparatus and method of supplying sufficient energy for a tag by transmitting a CW signal to search the tag by a first reader while a plurality of second readers transmits a CW signal in synchronous to the first reader in an RFID system equipped with a plurality of readers.
In addition, the present invention provides an energy pumping apparatus and method, wherein in a case a first reader transmits a CW signal to search a tag, a plurality of second readers determine a power of the CW signal transmitted from the first reader to the tag and thus in a case the first reader is situated too far-away to provide sufficient power to the tag, the plurality of second readers supply sufficient energy for the tag by transmitting a CW signal in synchronous to the first reader.
Furthermore, the present invention provides an energy pumping apparatus and method to prevent the breakage of a tag or retrieval unavailability of tag information due to an excessive energy transmission to the tag by determining the intensity of energy supplied into the tag and adjusting the power of a CW signal transmitted to the tag based on the determined intensity of energy by a first reader that retrieves the tag information.
Still furthermore, the present invention provides a thin film battery integral type semi-passive tag integrally having a thin film battery to charge reader-transmitted energy into the thin film battery, and operating using the charged power of the thin film battery.
Still furthermore, the present invention provides a thin film battery integral type semi-passive tag with a possibility of enhancing spatial efficiencies.
The technical challenge to be achieved by the invention is not limited to the aforementioned technical challenge, and of course, those skilled in the art would clearly understand not-mentioned other technical challenges from the following recitation.
An energy pumping apparatus of the present invention includes a reader controller recognizing a tag and controlling an action of reading a piece of information stored in the recognized tag, a RFID (Radio Frequency Identification) reader module producing a CW (Continuous Wave) signal and supplying energy into the tag, based on a control of the reader controller, to recognize the tag and read information stored in the tag, and an SSB (Spectrum Scanning Board) module detecting an RSSI (Received Signal Strength Indicator) of a CW signal transmitted to the tag and providing the detected RSSI to the reader controller.
The SSB module includes a directional coupler receiving signals received by the RFID reader module and the tag, a RSSI detector detecting an RSSI of signals received by the directional coupler, and an SSB controller providing an RSSI detected by the RSSI detector to the reader controller.
The SSB module includes a PLL circuit generating a local oscillating signal, a mixer generating an IF(Intermediate Frequency) signal by mixing an output signal of the directional coupler and an output signal of the PLL circuit, and an IF (Intermediate Frequency) processor generating signals of I (In-phas) channel and Q (Quadrature-phase) channel by processing an IF signal generated in the mixer, and outputting the generated signals of I channel and Q channel to the SSB controller, wherein the SSB controller reads out a signal transmitted from the RFID reader module and a signal transmitted from the tag using signals of the I channel and Q channel to provide the reading result to the reader controller.
A variable amplifier amplifying an output signal of the directional coupler and outputting it to the mixer may be included between the directional coupler and the mixer where an amplifying ratio varies in response to a gain control signal produced by the SSB controller.
And, An energy pumping method of the present invention includes determining if a signal transmitted to a tag by a second RFID reader module of a second reader that reads tag information has been detected by monitoring a received signal of a first SSB (Spectrum Scanning Board) module by a first reader controller provided at a first reader that does not read tag information, determining if a detected signal is a CW (Continuous Wave) signal, in a case a signal transmitted to the tag by the second RFID reader module is detected, and pumping energy supplied to the tag by transmitting a CW signal by a first RFID reader module according to a control of the first reader controller in a case the detected signal is a CW signal.
Pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module includes discriminating power of the CW (Continuous Wave) signal transmitted to the tag from the second RFID reader module by monitoring a received signal of the first SSB module by a first reader controller, and transmitting a CW signal by the first RFID reader module to pump energy supplied into a tag in a case the discriminated power is lower than a predetermined reference power.
After pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module, the method includes determining if a signal transmitted from a tag has ended by monitoring a received signal of the first SSB module by the first reader controller, and terminating the transmission of the CW signal by the first RFID reader module according to a control of the first reader controller in a case a signal transmitted from the tag is ended.
After pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module, the method includes determining if a signal transmitted from a tag is detected by monitoring a received signal of the first SSB module by the first reader controller, and counting errors in a case a signal transmitted from the tag has not been detected over a set time.
Pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module includes discriminating power of a CW signal transmitted to the tag from the first RFID reader module and the second RFID reader module by monitoring a received signal of a second SSB module by a second reader controller provided at the second reader that reads tag information, and transmitting the CW signal of a lowered power level by the second RFID reader module in a case the discriminated power is over a predetermined reference power.
Furthermore, an energy pumping method of the present invention includes transmitting a search signal by the first RFID module according to a control of the first reader controller and deciding a power level by determining an RSSI received from the first SSB module in a case the first reader reads tag information, and transmitting a signal with the determined power level to the first RFID reader module and performing a tag recognition and a tag information reading.
Transmitting the search signal includes setting a channel for reading tag information and determining whether the set channel is used or not by monitoring a received signal of the first SSB module, by the reader controller, altering a channel in a case the set channel is used and repeatedly determining whether the set channel is used or not by monitoring a received signal of the first SSB module, and transmitting a search signal through the set channel in a case the set channel is not used.
In addition, a thin film battery integral type semi-passive tag of the present invention includes a base film, a thin film battery stack film formed on the upper part of the base film, an antenna-purpose conductive paste film formed on the upper part of the thin film battery stack film, and an RFID (Radio-Frequency IDentification) tag chip connected to each of the thin film battery stack film and the antenna-purpose conductive paste film.
An insulating layer is interposed between the thin film battery stacked film and the antenna-purpose conductive paste film.
The antenna-purpose conductive paste film is a paste film containing Ag.
Furthermore, a thin film battery integral type semi-passive tag of the present invention includes a base film, a first thin film battery formed on the upper part of the base film, a first antenna formed on the upper part of the first thin film battery, a second thin film battery separated from the first thin film battery and formed on the upper part of the base film, a second antenna formed on the upper part of the second thin film battery, and an RFID tag chip electronically connected to the first and second thin film battery and the first and second antenna.
Each of the first thin film battery and the second thin film battery is comprised of a first conductive layer, a metal oxidant film, an electrolyte, a metal oxidant film, and a second conductive layer on the upper part of the base film.
An insulating layer is formed on the upper part of the second conductive layer and the first antenna and the second antenna are conductive paste films formed on the upper part of the insulating layer.
The electrolyte is a chargeable polymer electrolyte.
Also, the electrolyte is a solid state or a gel state.
Each of the first conductive layer, a metal oxide film, an electrolyte, a metal oxide film, the second conductive layer, the insulating layer and the conductive paste film is a sequentially printed layer on the upper part of the base film.
According to an energy pumping apparatus and an energy pumping method of the present invention, one first reader transmits a CW and reads information stored in a tag while a plurality of readers not reading information from any tag transmits their own CW signals in synchronous to the CW signal transmitted by the first reader.
Therefore, sufficient energy can be supplied to a tag, and as a result, a tag recognition distance can increase.
Furthermore, a thin film battery integral type semi-passive tag charges reader-transmitted energy into a thin film battery by integrally providing a thin film battery, and operates using a power charged in the thin battery. Also, an antenna-purpose conductive paste film can be formed on the upper part of a thin film battery stacked film, thereby enhancing the spatial efficiency of a battery and an antenna. Also, a thin film battery and an antenna can be simply stacked on the upper part of a base film by performing a printing process, thereby realizing a battery and an antenna in one process and achieving the simplification of a manufacturing process.
Hereinafter, the present invention will be described in detail through embodiments unlimiting the proposed invention with reference to the accompanying drawings, and in some drawings, a same component would be given a same or similar reference numeral.
FIG. 1 is a block diagram showing a construction of a preferred embodiment of readers according to an energy pumping apparatus of the invention;
FIG. 2 is a block diagram showing a construction of a preferred embodiment of an SSB module in an energy pumping apparatus of the invention;
FIGs. 3 and 4 are flowcharts showing an operation of a preferred embodiment of an energy pumping method of the invention;
FIG. 5 is a cross-section view showing a schematic construction of a preferred embodiment of a thin film battery integral type semi-passive tag of the invention;
FIG. 6 is a cross-section view showing a schematic construction of a preferred embodiment of a thin film battery in a thin film battery integral type semi-passive tag of the invention;
FIG. 7 is a cross-section view schematically showing a construction of another preferred embodiment according to a thin film battery integral type semi-passive tag of the invention;
FIG. 8 is a cross-section view showing a schematic construction to describe a thin film battery integral type semi-passive tag having a dipole antenna according to an embodiment of the invention;
FIG. 9 is a perspective view schematically showing a construction of a preferred embodiment of a dipole antenna in a thin film battery integral type semi-passive tag;
FIG. 10 is a diagram showing a schematic construction of a preferred embodiment to describe an RFID tag chip and dipole antenna electrically-connected state in a thin film battery integral type semi-passive tag of the present invention; and
FIG. 11 is a schematic diagram to describe a construction of a preferred embodiment of a state of an RFID tag chip electrically connected to a battery and a dipole antenna in a thin film battery integral type semi-passive tag of the present invention.
The following detailed description is by method of example, and merely illustrative of embodiments of the invention. In addition, the principle and concept of the present invention will be provided for the purpose of the most useful and easy description.
Thus, an unnecessary detailed structure in a basic understanding of the invention has not been provided, and several kinds of forms implemented from subject matters of the present invention by one skilled in the art are exemplified through the drawings.
FIG. 1 is a block diagram showing a construction of readers according to an energy pumping apparatus of the invention. Here, a symbol (100; 100-1, 100-2, 100-3, …) refers to a plurality of readers. Each of the plurality of readers 100 includes a reader controller (102; 102-1, 102-2, 102-3, …), an RFID reader module (104; 104-1, 104-2, 104-3, …), and an SSB (Spectrum Scanning Board) module (106; 106-1, 106-2, 106-3, …).
The reader controller 102 recognizes a tag (not shown in the figure) by controlling the RFID reader module 104. Also, in a case of not recognizing a tag, the reader controller 102 controls that the RFID reader module 104 may transmit a CW signal according to an output signal of the SSB module 106 to pump out energy supplied to a tag.
The RFID reader module 104 transmits a CW signal and a command modulated modulation signal and recognizes a tag, and reads a piece of given information stored in a tag. Also, in a case the RFID reader module 104 does not read given information stored in a tag, it transmits a CW signal according to a control of the reader controller 102 in order to pump energy supplied to the tag.
The SSB module 106 detects transferred information between the RFID reader module 104 and the tag interactively. Also, the SSB module 106 detects an RSSI (Received Signal Strength Indicator) of a CW signal transmitted by the RFID reader module 104 and provides the detected RSSI to the reader controller 102, so that the reader controller 102 controls that the reader controller 102 controls that the RFID reader module 104 may transmit a CW signal.
In an energy pumping apparatus of the present invention having such a configuration, a reader controller 102 controls an RFID reader module 104 to transmit a search signal in the case of recognizing a tag and reading given information stored in a recognized tag.
For example, in a case a first reader 100-1 recognizes a tag and reads given information stored in the recognized tag, a RFID reader module 104-1 transmits a search signal according to a control of a reader controller 102-1.
When a tag makes a response to a search signal transmitted by the RFID reader module 104-1 of the first reader 100-1, the RFID reader module 104-1 reads given information transferred by the tag while transmitting a CW signal and supplying energy to the tag.
At this time, SSB modules 106-2, 106-3, … equipped in each of second readers 100-2, 100-3, … not to read given information stored in a tag receive a CW signal transmitted by an RFID reader module 104-1 of the first reader 100-1 to detect an RSSI (Receive Signal Strength Indicator). Using the detected RSSI, reader controllers 102-2, 102-3, … of second readers 100-2, 100-3, … determine if a power intensity transmitted to the tag is lower than a predetermined reference electric power.
As a determination result, if the intensity of a power transmitted to the tag is lower than a predetermined reference power, in second readers 100-2, 100-3, …, RFID reader modules 104-2, 104-3, … transmit CW signals to pump energy transferred to the tag according to a control of the reader controller 102-2, 102-3, ….
In the first reader 100-1, an SSB module 106-1 receives a CW signal to detect an RSSI, and a reader controller 102-1 determines the intensity of a power transmitted to a tag by the detected RSSI. And, the reader controller 102-1 decides a power level of an RFID reader module 104-1 according to the determined power, and by the decided power level, the RFID reader module 104-1 communicates with a tag and reads tag information.
As shown in FIG. 2, the SSB module 106 includes a directional coupler 200, an RSSI detecting part 210, a variable amplifier 220, a PLL (Phase Locked Loop) circuit 230, a mixer 240, an IF (Intermediate Frequency) signal processing part 250, and an SSB (Spectrum Scanning Board) controller 260.
The directional coupler 200 receives signals transmitted by the RFID reader module 104 and a tag.
The RSSI detector 210 detects an RSSI (Received Signal Strength Indicator) of signals received by the directional coupler 200 and outputs it to the SSB controller 260.
The variable amplifier 220 amplifies the received signal of the directional coupler 200 while varying an amplifying ratio according to a gain control signal provided by the SSB controller 260.
The PLL circuit 230 generates a local oscillating signal of a given frequency under a control of the SSB controller 260.
The mixer 240 transforms an output signal of the variable amplifier 220 into an IF (Intermediate Frequency) signal by mixing it with a local oscillating signal of the PLL circuit 230.
The IF signal processing part 250 produces a baseband signal of an I (In-phase) channel and a Q (Quadrature-phase) channel by processing the IF signal generated by the mixer 240.
The SSB controller 260 generates a gain control signal according to an RSSI detected by the RSSI detecting part 210 to adjust an amplifying ratio of the variable amplifier 220. Also, the SSB controller 260 controls the PLL circuit 230 to produce a local oscillating signal, reads the RFID reader module 104 transmitting signal and the tag transmitting signals using an I channel and a Q channel generated by the IF signal processing part 250, and tells the reading result to the reader controller 102.
In an SSB module 106 having such a configuration, the directional coupler 200 receives the RFID reader module 104 transmitting signal and the tag transmitting signal, and outputs the received signal to the variable amplifier 220.
In a case the directional coupler 200 receives a signal, an RSSI detecting part 210 detects out an RSSI of the signal received by the directional coupler 200, and outputs the detected RSSI to an SSB controller 260.
The SSB controller 260 transmits the RSSI to the reader controller 102. Then, the reader controller 102 may determine energy supplied to the tag using the RSSI.
The SSB controller 260 produces a gain control signal according to the RSSI, and the produced gain control signal may be applied to a variable amplifier 220 to adjust an amplifying ratio of the variable amplifier 220.
Then, a signal received by the directional coupler 200 may be outputted with a certain intensity by a varying amplification through the variable amplifier 220, and an output signal of the variable amplifier 220 may be input to a mixer 240.
The SSB controller 260 controls a PLL circuit 240 to generate a local oscillating signal, and a local oscillating signal generated by the PLL circuit 240 may be input to the mixer 240.
Then, the mixer 240 mixes a local oscillating signal of the PLL circuit 230 to the output signal of the variable amplifier 220 to produce an IF signal, and the produced IF signal may be processed in the IF signal processing part 250 to generate I-channel and Q-channel signals, and the generated I channel and Q channel signals may be input to the SSB controller 260.
The SSB controller 260 reads the RFID reader module 104 transmitting signal and the tag transmitting signal using the I-channel and Q-channel input from the IF signal processing part 250, and tell the reader controller 102 of a reading result.
Using a read signal input from the SSB controller 260, the reader controller 102 can discriminate channels through which current readers 100-1, 100-2, 100-3, … communicate with a tag.
FIGS. 3 and 4 are flowcharts showing the operation of a reader controller 102 according to an energy pumping method of the present invention. Referring to FIG. 3, a reader controller 102 determines whether to search a tag or not (S300). For example, a reader controller 102-1 provided in a first reader 100-1 operates an RFID module 104-1 to determine whether to retrieve a tag or not.
As a result of the determination, if a tag should be searched, a reader controller 102-1 sets a channel for a tag retrieval (S302), and determines whether the set channel is used or not monitoring a received signal of an SSB module 106-1 (S304, S306). For example, the reader controller 102-1 determines if a plurality of other second readers 100-2, 100-3, … besides a first reader 100-1 uses the set channel to search a tag.
As a result of the determination, if the set channel is used, the reader controller 102-1 changes a channel for a tag search (S308), and returns to the step S304 and repeatedly performs the operation of monitoring a received signal of an SSB module 106-1 and as a monitoring result determining if the set channel is used or not.
In a case the set channel is not used, the reader controller 102-1 transmits a search signal to a frequency of the set channel and retrieves a tag controlling an RFID control module 104-1 (S310).
In such a status, the reader controller 102-1 determines an RSSI (Received Signal Strength Indicator) of an SSB module 106-1 receiving signal (S312). That is, the SSB module 106-1 receives a signal of the set channel frequency and detects an RSSI, and the reader controller 102-1 determines the intensity of an RSSI detected by the SSB module 106-1. And, the reader controller 102-1 decides a power level of a signal delivered by the RFID reader module 104-1 based on the determined RSSI (S314).
In a case the power level is decided, the RFID reader module 104-1 recognizes a tag and collects a piece of information stored in the tag by performing a tag recognition and tag information collecting algorithm using the decided power level according to a control of the reader controller 102-1 (S316).
In a case the tag recognition and tag information is completed, the reader controller 102-1 determines if an entire tag search has completed (S318).
As a result of the determination, if the entire tag search has not completed, the reader controller 102-1 returns to the step (S310), controls that the RFID reader module 104-1 transmit a search signal, decides a power level by the determination of an RSSI, performs a tag recognition and tag information collecting algorithm using the decided power level to recognize a tag, and repeatedly performs an operation of collecting information stored in the tag.
As a result of the determination, if an entire tag search has completed, the reader controller 102-1 ends a tag search operation.
On the other hand, as a result of determination at the step (S300), if a tag is not to be retrieved, the reader controller 102-1 monitors a received signal of an SSB module 106-1 as shown in FIG. 4 (S400). That is, the reader controller 102-1 monitors if RFID reader modules 104-2, 104-3, … of second readers 100-2, 100-3, … transmit a given signal to retrieve tag information through a received signal of an SSB module 106-1.
The controller determines as a result of monitoring whether RFID reader modules 104-2, 104-3, … transmit a predetermined signal (S402), and in a case RFID reader modules 104-2, 104-3, … transmit the predetermined signal, determines whether the predetermined signal is a CW signal for supplying energy to a tag (S404).
As a result of the determination, if the predetermined signal is a CW signal, the reader controller 102-1 determines the power of the CW signal through an RSSI detected by an RSSI detecting part 210 of the SSB module 106-1, and determines if the determined CW signal is lower than a predetermined reference electric power (S406).
That is, the reader controller 102-1 has pre-set a reference electric power according to an RSSI if the CW signal supplies sufficient energy to the tag. The reader controller 102-1 determines if a power of the CW signal determined by an RSSI detected by an RSSI detecting part 210 of the SSB module 106-1 is lower than a predetermined reference power.
As a result of the determination, if a CW signal power is not lower than a predetermined reference power, the reader controller 102-1 ends its operation without performing an energy pumping action.
As a result of the determination, if it is determined that the CW signal is below a reference power, the reader controller 102-1 transmits a CW signal (S408) and monitors a received signal of an SSB module (S410) controlling the RFID reader module 104-1.
As a result of monitoring of the SSB module reception signal, whether a tag signal has been detected is determined (S412), and if a tag signal has been detected, whether the tag signal has ended is determined (S414). That is, whether a tag has completed an information transmission is determined (S414).
As a result of the determination, if the tag signal has not ended, the reader controller 102-1 returns to the step (S408) and repeatedly performs an operation of transmitting the CW signal and monitoring a received signal of the SSB module 106-1 and determining if the tag signal has ended.
In such a state, if a tag signal transmission is ended, the reader controller 102-1 stops a CW signal transmission (S416), and ends an energy pumping action.
And, as a result of determination at the step (S412), if a tag signal is not detected, the reader controller 102-1 determines if a set time has elapsed (S418), and if a set time has not elapsed, flow reverts to the step (S410) and monitors a received signal of an SSB module and repeatedly performs an operation of determining whether a tag signal is detected or not.
In such a state, if a tag signal has not been detected by a predetermined time elapses, the reader controller 102-1 counts errors, stops the CW signal (S416), and ends an energy pumping action.
Using the error counts, a manager managing an RFID system can detect a poor tag or change Q value of a collision avoidance algorithm, and possibly determine the efficiency of an RFID system preferably employed for a management of the RFID system.
FIG. 5 is a cross-sectional view showing a schematic construction of a preferred embodiment according to a thin film battery integral type semi-passive tag of the present invention. Referring to FIG. 5, the present invention includes a base film 500, a thin film battery stack film 510 formed on the upper part of the base film 500, an antenna-purpose conductive paste film 530 formed on the upper part of the thin film battery stack film 510, and an RFID (Radio-Frequency IDentification) tag chip connected to the thin film battery stack film 510 and the antenna-purpose conductive paste film 530 each.
The conductive paste film 530 may be a paste film containing Ag.
An insulating layer 520 is interposed between the thin film battery stacked film 510 and the antenna-purpose conductive paste film 530. That is, in order to prevent the thin film battery stacked film 510 and the antenna-purpose conductive paste film 530 from being electrically short, an insulating layer 520 is interposed.
The conductive paste film 530 refers to an antenna of a semi-passive tag. To highlight technical characteristics of the present invention, a RFID tag chip has not been depicted in the drawing of FIG. 5.
And, since the conductive pasted film 530 of FIG. 5 is not partitioned but formed of a single film, it can be utilized as a thin film battery integral type semi-passive tag having a monopole antenna.
As described above, since a thin film battery integral type semi-passive tag of the present invention has formed an antenna-purpose paste film 530 on the upper part of the thin film battery stacked film 510, it has a benefit of enhancing a spatial efficiency of a battery and an antenna.
FIG. 6 is a cross-sectional view showing a schematic construction of a preferred embodiment according to a thin film battery integral type semi-passive tag of the present invention. For implementation, a thin film battery of the invention includes a first conductive layer 600 as a thin film battery stacked film 510, for example, an electrolyte 610 stacked on the upper part of the first conductive layer 600, and a second conductive layer 620 on the upper part of the electrolyte 610. Also, a thin film battery of the invention can be realized as several types of structures besides the above-described structure.
The first conductive layer 600 and second conductive layer 620 may be electrodes each having an opposite polarity. For example, in a case the first conductive layer 600 is an anode, the second conductive layer 620 is a cathode. Alternatively, in a case the first conductive layer 600 is a cathode, the second conductive layer 620 is an anode.
The electrolyte 610 may be a chargeable polymer electrolyte of a solid state or a gel state. Therefore, the possibility of a leakage occurrence can be ruled out that is a disadvantage of a liquid electrolyte.
FIG. 7 is a cross-sectional view schematically showing a construction of another preferred embodiment according to a thin film battery integral type semi-passive tag of the present invention. Referring to FIG. 7, a thin film battery integral type semi-passive tag of the present invention has a base film 500. For implementation, on the upper part of the base film 500, a first conductive layer 600, a metal oxide film 700, an electrolyte 610, a metal oxide film 710, a second conductive layer 620, an insulating layer 520 and a conductive paste film 530 may be sequentially printed.
The first conductive layer 600, the metal oxide film 700, the electrolyte 610, the metal oxide film 710 and the second conductive layer 620 may be the thin film battery stacked film 510, and the conductive paste film 530 may be an antenna.
An RFID tag chip may be electrically connected into the thin film battery stacked film 510 and the antenna-purpose conductive paste film 530.
As described above, the present invention simply stacks a thin film battery and an antenna on the upper part of a base film 500 by performing a printed process, thereby bearing a benefit of realizing a battery and an antenna in one process and achieving the simplification of a manufacturing process.
FIG. 8 is a cross-sectional view showing a schematic construction to describe a thin film battery integral type semi-passive tag having a dipole antenna according to an embodiment of the invention. An embodiment of FIG. 8 refers to a thin film battery integral type semi-passive tag having a dipole antenna that means 2 antennas, including a base film 500, a first thin film battery 800 stacked on the upper part of the base film 500, a first antenna 810 stacked on the upper part of the first thin film battery 800, a second thin film battery 802 distanced from the first thin film battery and stacked on the upper part of the base film 500, a second antenna 812 stacked on the upper part of the second thin film battery 802, and an RFID tag chip 820 electrically connected to the first thin film battery 800, the second thin film battery 802, the first antenna 810 and the second antenna 820.
Herein, the first thin film battery 800 and the first antenna 810 may be stacked on the upper part of the base film 500 by a sequential printing process. Also, the second thin film battery 802 and the second antenna 812 may be stacked in an area of the base film 500 separated from the first thin film battery 800 formed area by a sequential printing process.
That is, as shown in FIG. 9, the first antenna 810 and the second antenna 812 may be separated from each presence, and the first thin film battery 800 and the second thin film battery 802 may be formed at the lower part of each of the first antenna 810 and the second antenna 812. Therefore, the present invention can enhance a spatial efficiency compared to a tag including a battery and an antenna at a separate area.
FIG. 10 is a diagram showing a schematic construction of a preferred embodiment to describe an RFID tag chip and dipole antenna electrically connected state in a thin film battery integral type semi-passive tag of the invention. Referring to FIG. 10, at an RFID tag chip 820, a second electrode pad 1002 and a third electrode pad 1004 connected to batteries may be formed, and also at the RFID tag chip 820, a first electrode pad 1000 and a fourth electrode pad 1004 connected to a first antenna 810 and a second antenna 812 may be formed.
A method of electrically connecting a first to fourth electrode pads 1000, 1002, 1004, 1006 formed at the RFID tag chip 820 to the batteries, the first antenna 810 and the second antenna 812 may be performed in a variety way.
As one example method, a process of stacking the batteries, the first antenna 810 and the second antenna 812 on a base film 500 is performed. And, a process of electrically connecting a first to fourth electrode pads 1000, 1002, 1004, 1006 of the RFID tag chip to the batteries and the first antenna 810 and the second antenna 812 while mounting the RFID tag chip 820 on the upper part of the base film 500 may be performed.
As another example method, a process of stacking the batteries, the first antenna 810 and the second antenna 812 on a base film 500 is performed. And, a process of electrically connecting a first to fourth electrode pads 1000, 1002, 1004, 1006 of the RFID tag chip to the batteries and the first antenna 810 and the second antenna 812 after mounting the RFID tag chip 820 on the upper part of the base film 500 may be performed.
FIG. 11 is a schematic diagram to describe a construction of a preferred embodiment of a state of an RFID tag chip electrically connected to a battery and an antenna in a thin film battery integral type semi-passive tag of the present invention. Referring to FIG. 11, a technology of electrically connecting an RFID tag chip to a battery and an antenna may be applied to all thin film battery integral type semi-passive tag having a monopole antenna or a dipole antenna.
FIG. 11 shows a structure of one antenna 1100 and batteries provided at the lower part of the antenna 1100.
A first electrode pad 1000 of an RFID tag chip 820 is electrically connected to an antenna 1100, and each of a second electrode pad 1002 and a third electrode pad 1003 is electrically connected to a first conductive layer 600 and a second conductive layer 620 of a battery.
At this time, electrode lines 1110, 1112 for electrically connecting the first conductive layer 600 and the second conductive layer 620 of the battery to the second electrode pad 1002 and the third electrode pad 1004 respectively may be provided.
The antenna 1100 is provided with an extended part contacting the first electrode pad 1000 of the RFID tag chip 820, and this extended part may be configured to flip-chip bond to the first electrode pad 1000 of the RFID tag chip 820 by a bump.
A partial area of the first conductive layer 600 and the second conductive layer 610 may be exposed, and the exposed area may be provided with pads 1120, 1122 configured to electrically connect to the electrode lines 1110, 1112.
While the present invention has been described in detail through representative embodiments in the above part, those skilled in the art would understand that various modifications can be made in the described embodiment without departing from the scope of the present invention.
Therefore, the scope of the present invention rights should not be restricted to the described embodiment, but should be defined by the accompanying claims and its equivalents.

Claims (20)

  1. An energy pumping apparatus, comprising:
    a reader controller recognizing a tag and controlling an action of reading a piece of information stored in the recognized tag;
    a RFID (Radio Frequency Identification) reader module producing a CW (Continuous Wave) signal and supplying energy into the tag, based on a control of the reader controller, to recognize the tag and read information stored in the tag; and
    an SSB (Spectrum Scanning Board) module detecting an RSSI (Received Signal Strength Indicator) of a CW signal transmitted to the tag and providing the detected RSSI to the reader controller.
  2. The energy pumping apparatus of claim 1, wherein the SSB module includes:
    a directional coupler receiving signals received by the RFID reader module and the tag;
    a RSSI detector detecting an RSSI of signals received by the directional coupler; and
    an SSB controller providing an RSSI detected by the RSSI detector to the reader controller.
  3. The energy pumping apparatus of claim 2, wherein the SSB module includes,
    a PLL circuit generating a local oscillating signal;
    a mixer generating an IF(Intermediate Frequency) signal by mixing an output signal of the directional coupler and an output signal of the PLL circuit; and
    an IF (Intermediate Frequency) processor generating signals of I (In-phas) channel and Q (Quadrature-phase) channel by processing an IF signal generated in the mixer, and outputting the generated signals of I channel and Q channel to the SSB controller,
    wherein the SSB controller reads out a signal transmitted from the RFID reader module and a signal transmitted from the tag using signals of the I channel and Q channel to provide the reading result to the reader controller.
  4. The method of claim 3, wherein a variable amplifier amplifying an output signal of the directional coupler and outputting it to the mixer may be included between the directional coupler and the mixer where an amplifying ratio varies in response to a gain control signal produced by the SSB controller.
  5. An energy pumping method, comprising:
    determining if a signal transmitted to a tag by a second RFID reader module of a second reader that reads tag information has been detected by monitoring a received signal of a first SSB (Spectrum Scanning Board) module by a first reader controller provided at a first reader that does not read tag information;
    determining if a detected signal is a CW (Continuous Wave) signal, in a case a signal transmitted to the tag by the second RFID reader module is detected; and
    pumping energy supplied to the tag by transmitting a CW signal by a first RFID reader module according to a control of the first reader controller in a case the detected signal is a CW signal.
  6. The method of claim 5, wherein pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module includes,
    discriminating power of the CW (Continuous Wave) signal transmitted to the tag from the second RFID reader module by monitoring a received signal of the first SSB module by a first reader controller; and
    transmitting a CW signal by the first RFID reader module to pump energy supplied into a tag in a case the discriminated power is lower than a predetermined reference power.
  7. The method of claim 5, wherein after pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module, the method includes,
    determining if a signal transmitted from a tag has ended by monitoring a received signal of the first SSB module by the first reader controller; and
    terminating the transmission of the CW signal by the first RFID reader module according to a control of the first reader controller in a case a signal transmitted from the tag is ended.
  8. The method of claim 5, wherein after pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module, the method includes,
    determining if a signal transmitted from a tag is detected by monitoring a received signal of the first SSB module by the first reader controller; and
    counting errors in a case a signal transmitted from the tag has not been detected over a set time.
  9. The method of claim 5, wherein pumping energy supplied into a tag by transmitting a CW signal by the first RFID reader module includes,
    discriminating power of a CW signal transmitted to the tag from the first RFID reader module and the second RFID reader module by monitoring a received signal of a second SSB module by a second reader controller provided at the second reader that reads tag information; and
    transmitting the CW signal of a lowered power level by the second RFID reader module in a case the discriminated power is over a predetermined reference power.
  10. The method of claim 5, comprising:
    transmitting a search signal by the first RFID module according to a control of the first reader controller and deciding a power level by determining an RSSI received from the first SSB module in a case the first reader reads tag information; and
    transmitting a signal with the determined power level to the first RFID reader module and performing a tag recognition and a tag information reading.
  11. The method of claim 10, wherein transmitting the search signal includes,
    setting a channel for reading tag information and determining whether the set channel is used or not by monitoring a received signal of the first SSB module, by the reader controller;
    altering a channel in a case the set channel is used and repeatedly determining whether the set channel is used or not by monitoring a received signal of the first SSB module; and
    transmitting a search signal through the set channel in a case the set channel is not used.
  12. A thin film battery integral type semi-passive tag, comprising:
    a base film;
    a thin film battery stack film formed on the upper part of the base film;
    an antenna-purpose conductive paste film formed on the upper part of the thin film battery stack film; and
    an RFID (Radio-Frequency IDentification) tag chip connected to each of the thin film battery stack film and the antenna-purpose conductive paste film.
  13. The semi-passive tag of claim 12, wherein an insulating layer is interposed between the thin film battery stacked film and the antenna-purpose conductive paste film.
  14. The semi-passive tag of claim 12, wherein the antenna-purpose conductive paste film is a paste film containing Ag.
  15. A thin film battery integral type semi-passive tag, comprising:
    a base film;
    a first thin film battery formed on the upper part of the base film;
    a first antenna formed on the upper part of the first thin film battery;
    a second thin film battery separated from the first thin film battery and formed on the upper part of the base film;
    a second antenna formed on the upper part of the second thin film battery; and
    an RFID tag chip electronically connected to the first and second thin film battery and the first and second antenna.
  16. The antenna-purpose of claim 15, wherein each of the first thin film battery and the second thin film battery is comprised of a first conductive layer, a metal oxidant film, an electrolyte, a metal oxidant film, and a second conductive layer on the upper part of the base film.
  17. The antenna-purpose of claim 16, wherein an insulating layer is formed on the upper part of the second conductive layer and the first antenna and the second antenna are conductive paste films formed on the upper part of the insulating layer.
  18. The method of claim 16, wherein the electrolyte is a chargeable polymer electrolyte.
  19. The method of claim 16, wherein the electrolyte is a solid state or a gel state.
  20. The method of claim 16, wherein each of the first conductive layer, a metal oxide film, an electrolyte, a metal oxide film, the second conductive layer, the insulating layer and the conductive paste film is a sequentially printed layer on the upper part of the base film.
PCT/KR2010/006187 2009-09-10 2010-09-10 Apparatus and method for reader-based energy pumping and thin film battery integral type semi-passive tag WO2011031095A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020090085189A KR101086563B1 (en) 2009-09-10 2009-09-10 Apparatus and method for pumping energy
KR10-2009-0085189 2009-09-10
KR10-2009-0107722 2009-11-09
KR1020090107722A KR101617459B1 (en) 2009-11-09 2009-11-09 Semi-passive tag with thin film battery

Publications (2)

Publication Number Publication Date
WO2011031095A2 true WO2011031095A2 (en) 2011-03-17
WO2011031095A3 WO2011031095A3 (en) 2011-08-04

Family

ID=43732970

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2010/006187 WO2011031095A2 (en) 2009-09-10 2010-09-10 Apparatus and method for reader-based energy pumping and thin film battery integral type semi-passive tag

Country Status (1)

Country Link
WO (1) WO2011031095A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106886735A (en) * 2016-11-28 2017-06-23 厦门英诺尔电子科技股份有限公司 A kind of electronic tag and system for gathering material concentration
US11213773B2 (en) 2017-03-06 2022-01-04 Cummins Filtration Ip, Inc. Genuine filter recognition with filter monitoring system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060250251A1 (en) * 2005-05-06 2006-11-09 Intelleflex Corporation Semi-transparent RFID tags
US20070103311A1 (en) * 2005-10-21 2007-05-10 Bernard Kippelen Thin flexible radio frequency identification tags and subsystems thereof
KR100904672B1 (en) * 2008-12-29 2009-06-25 주식회사 파이칩스 Transceiver of radio frequency identification reader and calibrating method of transmitting output signal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060250251A1 (en) * 2005-05-06 2006-11-09 Intelleflex Corporation Semi-transparent RFID tags
US20070103311A1 (en) * 2005-10-21 2007-05-10 Bernard Kippelen Thin flexible radio frequency identification tags and subsystems thereof
KR100904672B1 (en) * 2008-12-29 2009-06-25 주식회사 파이칩스 Transceiver of radio frequency identification reader and calibrating method of transmitting output signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106886735A (en) * 2016-11-28 2017-06-23 厦门英诺尔电子科技股份有限公司 A kind of electronic tag and system for gathering material concentration
CN106886735B (en) * 2016-11-28 2023-07-11 厦门英诺尔电子科技股份有限公司 Electronic tag and system for collecting substance concentration
US11213773B2 (en) 2017-03-06 2022-01-04 Cummins Filtration Ip, Inc. Genuine filter recognition with filter monitoring system

Also Published As

Publication number Publication date
WO2011031095A3 (en) 2011-08-04

Similar Documents

Publication Publication Date Title
WO2014038862A1 (en) Wireless power transmitter for excluding cross-connected wireless power receiver and method for controlling the same
WO2017065413A1 (en) Multi-coil wireless charging method and device and system therefor
AU2019378529B2 (en) Method for receiving reference signal and electronic device therefor
US9269992B2 (en) Battery, battery pack, battery charger, and battery charging system
WO2017094997A1 (en) Wireless charging device, wireless power transmission method therefor, and recording medium for same
WO2010068062A2 (en) Contactless power transmission device
WO2016098927A1 (en) Multi-mode wireless power receiving device and method
EP2754227A1 (en) Method for transmitting signals from a plurality of wireless power receivers to wireless power supplier
WO2017138713A1 (en) Wireless power device having plurality of transmission coils and driving method therefor
WO2020080815A1 (en) Apparatus and method for selecting uplink based on communication state
WO2017078285A1 (en) Wireless power transmitter
WO2021162302A1 (en) Method and device for stabilizing communication performance during wireless power transmission
WO2020045881A1 (en) Method and electronic device for forming beam in wireless communication system
WO2015199466A1 (en) Wireless power transfer system
WO2011031095A2 (en) Apparatus and method for reader-based energy pumping and thin film battery integral type semi-passive tag
WO2020117000A1 (en) Battery management device and method
WO2018074803A1 (en) Wireless power transmission device
WO2020197076A1 (en) Wireless power receiving device and control method thereof
WO2019013480A1 (en) Wireless charging device having wireless communication coil
US11837978B2 (en) Power wiring network apparatus
WO2021201372A1 (en) Electronic device supporting dual-connectivity and method for operating the same
WO2018155756A1 (en) Flexible nfc sensor tag and method for manufacturing flexible nfc sensor tag
WO2020122350A1 (en) Wireless charging device and battery charging method therefor
WO2019194419A1 (en) Wireless charging device
US11876574B2 (en) Power wiring network apparatus

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10815640

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10815640

Country of ref document: EP

Kind code of ref document: A2