CN211405621U - NFC-based power supply circuit and passive electronic terminal with same - Google Patents
NFC-based power supply circuit and passive electronic terminal with same Download PDFInfo
- Publication number
- CN211405621U CN211405621U CN201921823616.3U CN201921823616U CN211405621U CN 211405621 U CN211405621 U CN 211405621U CN 201921823616 U CN201921823616 U CN 201921823616U CN 211405621 U CN211405621 U CN 211405621U
- Authority
- CN
- China
- Prior art keywords
- energy storage
- energy
- storage capacitor
- nfc
- circuit
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
Abstract
A NFC-based power supply circuit and a passive electronic terminal with the same are provided. The power supply circuit comprises an antenna module, a first energy storage module, a second energy storage module, a micro control unit circuit and a driving circuit. When the NFC equipment is close to the coil, an energy transmission channel is established, the coil generates first energy to a first energy storage capacitor for first energy storage, and the first energy is supplied to a micro-control unit circuit to start the micro-control unit circuit to work normally; when the NFC equipment detects an antenna feedback signal, a communication transmission channel is established, an NFC carrier signal is transmitted to the antenna module, the coil generates second energy to the second energy storage capacitor for second energy storage, wherein the second energy is larger than the first energy, and the capacitance value of the second energy storage capacitor is larger than that of the first energy storage capacitor, the micro control unit circuit receives an instruction and transmits the instruction to the driving circuit, and the driving circuit drives a load through the energy released by the second energy storage capacitor. The utility model discloses reverse power supply's response speed is fast.
Description
Technical Field
The utility model relates to a supply circuit especially relates to a supply circuit based on NFC and passive electronic terminal who has this supply circuit.
Background
With the development of wireless technology, products and applications based on NFC (Near Field Communication) technology have also been rapidly developed, and are particularly widely applied in the payment and Communication fields such as public transportation, door control, mobile payment, identity recognition, airline package and baggage recognition, mail sorting, warehousing, electronic anti-counterfeiting and the like. However, in the field of wireless power supply and the field of application of the internet of things, in the application of wireless near field communication and a reverse power supply (for example, charging other devices by using a mobile terminal such as a mobile phone as a mobile power supply is generally called reverse charging, at the moment, the mobile terminal such as the mobile phone can be called a "reverse power supply", and charging the mobile phone by using the power supply is generally called forward charging), the application of the internet of things is basically blank, the application of the internet of things is more and more extensive, the convenient experience of the mobile terminal is more and more popular with the public, but at present, the internet of things devices on the market all use a battery power supply or external power supply mode, some devices with ultra-low power consumption or no power consumption still need to be powered by external contact or expensive special wireless devices to transmit weak electric quantity, and the wireless power supply cannot be used in a practical stage far away.
At present, the nominal passive electronic products on the market, such as electronic locks, have no battery inside, and mainly rely on external contact type contacts of special equipment for power supply and communication to work; for example, an NFC encryption card needs a special card reader to work, has very low output power, can only work at microampere level, and most of these products are in a primary use stage or a concept stage, which mainly has two disadvantages, one is that the energy collected by an antenna is small, and reliable and sustainable power supply cannot be really achieved; one is for the load capacity is strong, and its outside energy storage medium, electric capacity are big, and when leading to the two-way read-write handshake work of NFC communication to detect, because energy storage capacitor absorbed energy is too big, lead to receiving terminal response slow down and failure rate high, influence user experience.
For example, in order to save power, the conventional NFC device (e.g., a mobile terminal) usually only uses a timing detection method, and when approaching an object to be detected, no antenna feedback signal is sensed. And, the NFC carrier signal is usually intermittent and is only opened for a short time, and once the antenna is detected, the NFC device opens all the NFC carrier signals to guarantee communication. If passive electronic equipment is being close to when detecting, need absorb very big energy, can lead to NFC carrier signal attenuation of NFC equipment too big, can't establish connection or easy disconnection with the label two-way, the unable NFC carrier signal that just leads to NFC equipment of connecting just also can not all open, only passive electronic equipment's energy storage capacitor voltage rises to behind the certain degree, NFC equipment just can detect antenna communication, establish with the antenna then and be connected, and control circuit work, but this time delay is longer, user's experience has seriously been influenced.
Therefore, how to provide a power supply circuit with fast response speed and capable of really realizing reverse power supply to solve the problems faced by the prior art, such as low efficiency, slow response, mutual interference and other core problems of energy storage media in various severe environments, is an urgent issue to be solved in the field.
SUMMERY OF THE UTILITY MODEL
To one or more defects of the above prior art, the present invention provides a supply circuit based on NFC and a passive electronic terminal having the supply circuit, which can really realize reverse power supply and have a fast response speed.
In order to achieve the above object, the utility model provides a supply circuit based on NFC, its characteristics lie in, include:
an antenna module, which is internally provided with an NFC chip and is provided with a coil and a voltage output node;
the first energy storage module is connected with the coil through the voltage output node and is provided with a first energy storage capacitor;
the second energy storage module is connected with the coil through the voltage output node and is provided with a second energy storage capacitor and a switch for controlling the second energy storage capacitor to be charged and turned on/off, and the capacitance value of the second energy storage capacitor is greater than that of the first energy storage capacitor;
the micro control unit circuit is connected with the coil, the first energy storage module and the second energy storage module through the voltage output node;
the driving circuit is connected with the micro-control unit circuit and is connected with the second energy storage capacitor through the voltage output node;
when the NFC equipment is close to the coil of the antenna module, an energy transmission channel between the antenna module and the NFC equipment is established through the coil, and the coil generates first energy to the first energy storage capacitor for first energy storage through magnetic field resonance and provides the first energy to the micro control unit circuit to start the micro control unit circuit to normally work;
when the NFC equipment detects an antenna feedback signal fed back by the antenna module, a communication transmission channel between the antenna module and the NFC equipment is established through the coil, the NFC equipment transmits an NFC carrier signal to the antenna module through the communication transmission channel, the coil of the antenna module generates second energy to the second energy storage capacitor for second energy storage through receiving the NFC carrier signal, wherein the second energy is larger than the first energy, the micro-control unit circuit receives an instruction sent by the NFC chip and transmits the instruction to a driving circuit, and the driving circuit receives the instruction and drives a load through energy released by the second energy storage capacitor.
In an embodiment of the present invention, the NFC-based power supply circuit further includes: and the rectifier circuit is provided with two input nodes and two output nodes, the two input nodes are respectively connected with two ends of the coil, one of the two output nodes is connected with the voltage output node, the other of the two output nodes is grounded, and the generated first energy and the second energy are transmitted to the first energy storage capacitor and the second energy storage capacitor through the direct current electric energy converted into stable voltage by the rectifier circuit.
In an embodiment of the present invention, the rectifier circuit is a full bridge rectifier circuit composed of four first diodes; and/or the positive end of the first energy storage capacitor is connected to the voltage output node, and the negative end of the first energy storage capacitor is connected to the other one of the two output nodes of the rectifying circuit and is simultaneously grounded.
In an embodiment of the invention, the switch of the second energy storage module comprises a first transistor switch and a second transistor switch, and the second energy storage module further comprises a second diode, wherein,
the first end of the first transistor switch is connected to the micro-control unit circuit, the second end of the first transistor switch is connected to the first end of the second transistor switch, and the third end of the first transistor switch is grounded;
the second end of the second transistor switch is connected to the voltage output node, and the third end of the second transistor switch is connected to the positive end of the second energy storage capacitor;
the negative end of the second energy storage capacitor is connected to the third end of the first transistor and is grounded;
the positive end of the second diode is connected to the positive end of the second energy storage capacitor, and the negative end of the second diode is connected to the voltage output node and connected to the micro-control unit circuit and the driving circuit;
when the first energy storage is carried out, the micro control unit circuit enables the second energy storage capacitor to be in a charging off state without absorbing energy by turning off the first transistor switch and the second transistor switch;
when the second energy storage is carried out, the micro control unit circuit enables the second energy storage capacitor to be in a charging starting state of absorbing energy by starting the first transistor switch and the second transistor switch.
In an embodiment of the present invention, the micro control unit circuit controls the switch to be turned on when the voltage output node detects the increase of the output voltage of the coil, so that the second energy storage capacitor is in a charging on state for absorbing energy, so as to perform the second energy storage; and/or the micro control unit circuit starts to respond to the instruction received from the NFC chip when the second energy storage capacitor is in a matching state of carrying out second energy storage to drive a load.
In order to achieve the above object, the present invention further provides a passive electronic terminal, which is characterized in that it has the power supply circuit as described above.
In another embodiment of the present invention, the passive electronic terminal is an electronic lock.
The utility model discloses a divide into one-level power supply system (for example electric capacity) with the energy storage medium (for example electric capacity) in the circuit (carry out first energy storage and power supply through first energy storage electric capacity promptly) and second grade power supply system (carry out second energy storage and power supply through second energy storage electric capacity promptly), can directly absorb the reverse energy of NFC equipment (for example mobile terminal, cell-phone), promote the thing networking product from the design that has the battery to the practical degree of no battery, lay the technological basis for passive thing networking product wide application to obtain quick civilian popularization.
The utility model has the advantages that: the NFC wireless power supply has the advantages of no external power supply, zero power consumption, quick reverse power supply response, high output power, simple circuit and low cost, solves the problem that the NFC wireless power supply meets the application blank of communication, power supply and encrypted multitask processing in the product of the Internet of things, really has commercial value in multiple fields in large batch, and reduces the pollution to the environment caused by the dependence of disposable batteries and batteries on the use of the traditional electronic products in the future.
Drawings
In order to make the aforementioned and other objects, features, advantages and embodiments of the invention more comprehensible, the following description is given:
fig. 1 is a schematic diagram of a preferred NFC-based power supply method according to the present invention;
fig. 2 is a schematic structural diagram of a preferred NFC-based power supply circuit according to the present invention.
Detailed Description
In order to make the description of the present invention more complete and complete, reference is made to the accompanying drawings and the various embodiments described below, in which like numerals represent the same or similar elements. In other instances, well-known elements and steps have not been described in detail so as not to unnecessarily obscure the present invention. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner.
As shown in fig. 1, the present invention provides a power supply method based on NFC, which can be used for an NFC device to supply power to a load through an antenna module, wherein the antenna module is provided with an NFC chip and a coil. The power supply method comprises the following steps:
Preferably, in the present invention, the NFC-based power supply method may further include: the generated first energy and second energy are converted into stabilized direct current electric energy through a rectifying circuit and transmitted to the first energy storage capacitor and the second energy storage capacitor.
Moreover, the NFC-based power supply method may further include: when the first energy storage is carried out, the micro control unit circuit enables the second energy storage capacitor to be in a charging off state without absorbing energy by closing the switch; when the second energy storage is carried out, the micro control unit circuit enables the second energy storage capacitor to be in a charging starting state of absorbing energy by starting the switch.
The utility model discloses in, this little the control unit circuit for example can be when the output voltage who detects the coil risees control switch opens and makes second energy storage electric capacity be in the open mode of charging of absorbed energy to carry out the second energy storage. The micro-control unit circuit may, for example, begin to respond to receiving instructions from the NFC chip when the second energy storage capacitor is in a matched state in which the second energy storage is sufficient to drive the load.
Correspondingly, as shown in fig. 2, the present invention further provides a NFC-based power supply circuit, which includes an antenna module 21, a first energy storage module 22, a second energy storage module 23, a micro control unit circuit (i.e., MCU circuit) 24 and a driving circuit 25. Preferably, the power supply circuit may further include a rectifying circuit 26.
The antenna module 21 has an NFC chip built therein, and has a coil L1 and a voltage output node VCC.
The rectifier circuit 26 is, for example, a full bridge rectifier circuit composed of four first diodes D1, which has two input nodes (e.g., node 1 and node 3) and two output nodes (e.g., node 2 and node 4). Wherein the two input nodes, such as node 1 and node 3, are respectively connected to two ends of the coil L1, one of the two output nodes (such as node 2) is connected to the voltage output node VCC, and the other of the two output nodes (such as node 4) is grounded.
The first energy storage module 22 is connected to the coil L1 through the voltage output node VCC and has a first energy storage capacitor C1. For example, the positive terminal of the first energy storage capacitor C1 may be connected to the voltage output node VCC, and the negative terminal of the first energy storage capacitor C1 may be connected to the other of the two output nodes (e.g., node 4) of the rectifier circuit 26 while being grounded.
The second energy storage module 23 is connected to the coil L1 through the voltage output node VCC, and has a second energy storage capacitor C2 and a switch for controlling the charging on/off of the second energy storage capacitor C2, and the capacitance of the second energy storage capacitor C2 is greater than the capacitance of the first energy storage capacitor C1. Preferably, the switches may include, for example, a first transistor switch Q1 and a second transistor switch Q2, and the second energy storage module 23 further includes a second diode D2. The first terminal of the first transistor switch Q1 is connected to the mcu 24, the second terminal of the first transistor switch Q1 is connected to the first terminal of the second transistor switch Q2, and the third terminal of the first transistor switch Q1 is grounded. The second terminal of the second transistor switch Q2 is connected to the voltage output node VCC, and the third terminal of the second transistor switch Q2 is connected to the positive terminal of the second energy-storage capacitor C2. The negative terminal of the second energy-storing capacitor C2 is connected to the third terminal of the first transistor Q1 and is also connected to ground. The positive terminal of the second diode D2 is connected to the positive terminal of the second energy storage capacitor C2, and the negative terminal of the second diode D2 is connected to the voltage output node VCC and to the mcu circuit 24 and the driver circuit 25. Preferably, a first resistor R1 is further connected between the first end of the first transistor switch Q1 and the mcu 24; a second resistor R2 is connected between the first end and the third end of the first transistor switch Q1 and is grounded; a third resistor R3 is also connected between the second terminal of the first transistor switch Q1 and the first terminal of the second transistor switch Q2.
The mcu circuit 24 is connected to the coil L1, the first energy storage module 22, and the second energy storage module 23 via the voltage output node VCC.
The driving circuit is connected to the mcu circuit 24 and is connected to the second energy-storage capacitor C2 through the voltage output node VCC.
When an NFC device (not shown) approaches the coil L1 of the antenna module 21, an energy transmission channel between the antenna module 21 and the NFC device can be established through the coil L1, and the coil L1 generates a first energy to the first energy storage capacitor through magnetic field resonance for first energy storage, so as to provide the energy to the mcu circuit 24 to start the mcu circuit 24 to operate normally.
When the NFC device detects an antenna feedback signal fed back by the antenna module 21, a communication transmission channel between the antenna module 21 and the NFC device may be established through the coil L1, and the NFC device may transmit an NFC carrier signal to the antenna module 21 through the communication transmission channel, and the coil L1 of the antenna module 21 may generate a second energy to the second energy storage capacitor C2 for second energy storage by receiving the NFC carrier signal, where the second energy is greater than the first energy. Furthermore, the mcu circuit 24 can receive the command from the NFC chip of the antenna module 21 and transmit the command to a driving circuit 25, and the driving circuit 25 can receive the command and drive a load by the energy released from the second energy-storing capacitor C2.
In the present invention, preferably, the first energy and the second energy generated by the coil L1 can be converted into the stabilized dc power by the rectifier circuit 26 and transmitted to the first energy storage capacitor C1 and the second energy storage capacitor C2. In addition, during the first energy storage, the mcu 24 can make the second energy storage capacitor C2 in the charging-off state without absorbing energy by turning off the first transistor switch Q1 and the second transistor switch Q2. During the second energy storage, the mcu 24 can make the second energy storage capacitor C2 in the energy-absorbing charge-on state by turning on the first transistor switch Q1 and the second transistor switch Q2.
Preferably, the mcu circuit 24 controls the switches (e.g., Q1 and Q2) to open when the voltage output node VCC detects a rise in the output voltage of the coil L1, so that the second energy storage capacitor C2 is in the energy-absorbing charge-on state for performing the second energy storage. And, the mcu circuit 24 starts to respond to the instruction received from the NFC chip when the second energy storage capacitor C2 is in the matching state for second energy storage sufficient to drive the load.
The present invention also provides a passive electronic terminal, which may have a power supply circuit as described above. Preferably, the passive electronic terminal may be an electronic lock, for example.
More specifically, in conjunction with the power supply circuit shown in fig. 2, the power supply method of the present invention may include the following steps:
(1) when an NFC device (e.g., a mobile terminal, a mobile phone with an NFC function) is close to the coil L1 of the antenna module 21, an energy transmission channel between the antenna module 21 and the NFC device may be established on the premise of two-sided magnetic field induction, and a first energy (smaller energy) generated by magnetic field resonance may be provided to the first energy storage capacitor C1 with a smaller capacitance value through the coil L1 to start a near field for fast charging (i.e., performing first energy storage).
(2) At this time, the voltage of the voltage output node VCC in the second energy storage module 23 is lower, and the first energy can be provided to the MCU circuit 24 for starting up, so that the MCU circuit starts to operate normally to control the switches Q1 and Q2 in the second energy storage module 23 not to turn on, and at this time, the second energy storage capacitor C2 in the second energy storage module 23 does not absorb energy.
(3) When the NFC device detects an antenna feedback signal (for example, a tag is detected) of the antenna module 21, a communication transmission channel between the antenna module 21 and the NFC device may be established, that is, bidirectional communication may be started, at this time, the NFC carrier signal of the NFC device may be completely turned on, and energy is transmitted through the energy transmission channel, the coil L1 of the antenna module 21 receives the NFC carrier signal and generates a second energy, at this time, the voltage of the voltage output node VCC rises, and when the MCU circuit 24 detects the voltage rise, the switch Q1 and the switch Q2 in the second energy storage module 23 start to be controlled to be turned on.
(4) When the switches Q1 and Q2 in the second energy storage module 23 are turned on, the generated second energy can start to rapidly charge the second energy storage capacitor C2 with a larger capacitance (i.e., perform the second energy storage), and after the effective time and power are matched, the matching state sufficient for driving the load to work is achieved.
(5) At this time, the MCU circuit 24 starts to respond to the instruction received from the internal communication interface of the built-in NFC chip and transmits the instruction to the drive circuit 25.
(6) When the driving module 25 receives the instruction from the MCU circuit 24, the driving module can drive the load to work by discharging the supplied large energy from the second energy-storage capacitor C2 through the second diode D2.
The utility model discloses a divide into one-level power supply system (for example electric capacity) with the energy storage medium (for example electric capacity) in the circuit (carry out first energy storage and power supply through first energy storage electric capacity promptly) and second grade power supply system (carry out second energy storage and power supply through second energy storage electric capacity promptly), can directly absorb the reverse energy of NFC equipment (for example mobile terminal, cell-phone), promote the thing networking product from the design that has the battery to the practical degree of no battery, lay the technological basis for passive thing networking product wide application to obtain quick civilian popularization.
Moreover, the utility model discloses an adopt the multiplexing operating mechanism of timesharing, make NFC equipment (for example mobile terminal) just begin to absorb less energy when detecting the antenna to NFC equipment and antenna establish connection fast; and wait to open the whole NFC carrier signal with NFC equipment after detecting the antenna again, control circuit just absorbs great energy in order to supply with control circuit and drive circuit through second energy storage capacitor this moment to accelerated the response speed of antenna, promoted user experience, reached the effect of popularization practicality.
The utility model has the advantages that: the NFC wireless power supply has the advantages of no external power supply, zero power consumption, quick reverse power supply response, high output power, simple circuit and low cost, solves the problem that the NFC wireless power supply meets the application blank of communication, power supply and encrypted multitask processing in the product of the Internet of things, really has commercial value in multiple fields in large batch, and reduces the pollution to the environment caused by the dependence of disposable batteries and batteries on the use of the traditional electronic products in the future.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (7)
1. An NFC-based power supply circuit, comprising:
an antenna module, which is internally provided with an NFC chip and is provided with a coil and a voltage output node;
the first energy storage module is connected with the coil through the voltage output node and is provided with a first energy storage capacitor;
the second energy storage module is connected with the coil through the voltage output node and is provided with a second energy storage capacitor and a switch for controlling the second energy storage capacitor to be charged and turned on/off, and the capacitance value of the second energy storage capacitor is greater than that of the first energy storage capacitor;
the micro control unit circuit is connected with the coil, the first energy storage module and the second energy storage module through the voltage output node;
the driving circuit is connected with the micro-control unit circuit and is connected with the second energy storage capacitor through the voltage output node;
when the NFC equipment is close to the coil of the antenna module, an energy transmission channel between the antenna module and the NFC equipment is established through the coil, and the coil generates first energy to the first energy storage capacitor for first energy storage through magnetic field resonance and provides the first energy to the micro control unit circuit to start the micro control unit circuit to normally work;
when the NFC equipment detects an antenna feedback signal fed back by the antenna module, a communication transmission channel between the antenna module and the NFC equipment is established through the coil, the NFC equipment transmits an NFC carrier signal to the antenna module through the communication transmission channel, the coil of the antenna module generates second energy to the second energy storage capacitor for second energy storage through receiving the NFC carrier signal, wherein the second energy is larger than the first energy, the micro-control unit circuit receives an instruction sent by the NFC chip and transmits the instruction to a driving circuit, and the driving circuit receives the instruction and drives a load through energy released by the second energy storage capacitor.
2. The NFC-based power supply circuit of claim 1, further comprising:
and the rectifier circuit is provided with two input nodes and two output nodes, the two input nodes are respectively connected with two ends of the coil, one of the two output nodes is connected with the voltage output node, the other of the two output nodes is grounded, and the generated first energy and the second energy are transmitted to the first energy storage capacitor and the second energy storage capacitor through the direct current electric energy converted into stable voltage by the rectifier circuit.
3. The NFC-based power supply circuit according to claim 2, wherein the rectifying circuit is a full-bridge rectifying circuit composed of four first diodes; and/or the positive end of the first energy storage capacitor is connected to the voltage output node, and the negative end of the first energy storage capacitor is connected to the other one of the two output nodes of the rectifying circuit and is simultaneously grounded.
4. The NFC-based power supply circuit of claim 3, wherein the switches of the second energy storage block comprise a first transistor switch and a second transistor switch, and the second energy storage block further comprises a second diode, wherein,
the first end of the first transistor switch is connected to the micro-control unit circuit, the second end of the first transistor switch is connected to the first end of the second transistor switch, and the third end of the first transistor switch is grounded;
the second end of the second transistor switch is connected to the voltage output node, and the third end of the second transistor switch is connected to the positive end of the second energy storage capacitor;
the negative end of the second energy storage capacitor is connected to the third end of the first transistor and is grounded;
the positive end of the second diode is connected to the positive end of the second energy storage capacitor, and the negative end of the second diode is connected to the voltage output node and connected to the micro-control unit circuit and the driving circuit;
when the first energy storage is carried out, the micro control unit circuit enables the second energy storage capacitor to be in a charging off state without absorbing energy by turning off the first transistor switch and the second transistor switch;
when the second energy storage is carried out, the micro control unit circuit enables the second energy storage capacitor to be in a charging starting state of absorbing energy by starting the first transistor switch and the second transistor switch.
5. The NFC-based power supply circuit of claim 4, wherein the MCU circuit controls the switch to turn on when the voltage output node detects that the output voltage of the coil rises, so that the second energy storage capacitor is in a charge-on state for absorbing energy to perform the second energy storage; and/or the presence of a catalyst in the reaction mixture,
the micro-control unit circuit starts to respond to and receive the instruction from the NFC chip when the second energy storage capacitor is in a matching state of carrying out second energy storage to drive a load.
6. A passive electronic terminal, characterized in that it has a supply circuit as claimed in any one of claims 1 to 5.
7. The passive electronic terminal of claim 6, wherein the passive electronic terminal is an electronic lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921823616.3U CN211405621U (en) | 2019-10-28 | 2019-10-28 | NFC-based power supply circuit and passive electronic terminal with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921823616.3U CN211405621U (en) | 2019-10-28 | 2019-10-28 | NFC-based power supply circuit and passive electronic terminal with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211405621U true CN211405621U (en) | 2020-09-01 |
Family
ID=72213879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921823616.3U Active CN211405621U (en) | 2019-10-28 | 2019-10-28 | NFC-based power supply circuit and passive electronic terminal with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211405621U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112511791A (en) * | 2020-09-15 | 2021-03-16 | 深圳市立显通科技有限公司 | NFC passive driving induction power taking method and display intelligent device |
| CN112634494A (en) * | 2020-12-14 | 2021-04-09 | 广芯微电子（广州）股份有限公司 | Passive NFC cloud lock system |
-
2019
- 2019-10-28 CN CN201921823616.3U patent/CN211405621U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112511791A (en) * | 2020-09-15 | 2021-03-16 | 深圳市立显通科技有限公司 | NFC passive driving induction power taking method and display intelligent device |
| CN112634494A (en) * | 2020-12-14 | 2021-04-09 | 广芯微电子（广州）股份有限公司 | Passive NFC cloud lock system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103683530B (en) | A kind of data transmission method and apply its wireless charging device | |
| US8160654B2 (en) | Power reception control device, power reception device, and electronic instrument | |
| US20170294807A1 (en) | System and method for bidirectional wireless power transfer | |
| US9343929B2 (en) | Dual mode wireless power receiver | |
| US8583075B2 (en) | Power supply control apparatus and method thereof and mobile apparatus using the same | |
| US9837203B2 (en) | Apparatuses having different modes of operation for inductive wireless power transfer and related method | |
| CN211405621U (en) | NFC-based power supply circuit and passive electronic terminal with same | |
| US10211720B2 (en) | Wireless power transmitter having low noise and high efficiency, and related methods | |
| US11239706B2 (en) | Wireless charging receiving device, wireless charging method and system, and terminal device | |
| CN105244943A (en) | Wireless charging system of intelligent mobile terminal, and intelligent mobile terminal | |
| CN110768392B (en) | Inductively coupled power transmission and full duplex signal hybrid transmission circuit and method | |
| US11405074B2 (en) | NFC interface with energy management function | |
| WO2021227652A1 (en) | Wireless charging device and device to be charged | |
| CN203813502U (en) | Intelligent power management chip realizing wireless charge and ultra-thin on-board unit | |
| CN104239833A (en) | Low-power-consumption card reader and using method thereof | |
| CN105933027B (en) | Using the wireless sensor system of flaky electric capacity | |
| CN102347626B (en) | Power supply control device and method as well as mobile device using same | |
| CN100367624C (en) | High conversion efficiency non-contact charger | |
| CN202049513U (en) | Power supply device in non-contact card | |
| CN111030321A (en) | Power supply method and power supply circuit based on NFC and passive electronic terminal with power supply circuit | |
| CN201234162Y (en) | Intelligent auxiliary electric power fast switching apparatus | |
| CN201877870U (en) | Portable wireless charging system | |
| CN105900311A (en) | Device for receiving wireless power | |
| US20220271568A1 (en) | Nfc charging | |
| CN203522344U (en) | Handset system capable of wirelessly supplying power outwards |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220217 Address after: 518000 1002, Beiyou science and technology building, No. 42, Gaoxin South Ring Road, high tech Zone community, Yuehai street, Nanshan District, Shenzhen, Guangdong Province Patentee after: Shenzhen Meikai Innovation Technology Co.,Ltd. Address before: 518000 floor 3, block B, Fuhua science and technology building, 9116 Beihuan Avenue, Nanshan District, Shenzhen, Guangdong Patentee before: SHENZHEN INTERNET OF THINGS CLOUD INFORMATION TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP02 | Change in the address of a patent holder |
Address after: 518000 No. 808-b051, Qianhai Xiangbin building, No. 18, free trade West Street, Nanshan street, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong Province Patentee after: Shenzhen Meikai Innovation Technology Co.,Ltd. Address before: 518000 1002, Beiyou science and technology building, No. 42, Gaoxin South Ring Road, high tech Zone community, Yuehai street, Nanshan District, Shenzhen, Guangdong Province Patentee before: Shenzhen Meikai Innovation Technology Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |