WO2017063136A1 - Nfc and wireless charging sharing coil - Google Patents

Nfc and wireless charging sharing coil Download PDF

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Publication number
WO2017063136A1
WO2017063136A1 PCT/CN2015/091818 CN2015091818W WO2017063136A1 WO 2017063136 A1 WO2017063136 A1 WO 2017063136A1 CN 2015091818 W CN2015091818 W CN 2015091818W WO 2017063136 A1 WO2017063136 A1 WO 2017063136A1
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WO
WIPO (PCT)
Prior art keywords
nfc
signal
wireless charging
function
coil
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PCT/CN2015/091818
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French (fr)
Chinese (zh)
Inventor
于保华
胡颖
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苏州宝润电子科技有限公司
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Priority to PCT/CN2015/091818 priority Critical patent/WO2017063136A1/en
Publication of WO2017063136A1 publication Critical patent/WO2017063136A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems

Definitions

  • Wireless charging technology also known as non-contact inductive charging
  • wireless power transmission technology using near-field sensing, inductive coupling, and energy is transmitted from a power supply device to a powered device.
  • the received energy charges the battery and is used for its own operation.
  • wireless charging standards Qi standard, PMA standard, and A4WP standard.
  • the wireless charging function covered by the present invention is an electromagnetic induction technology based on the Qi standard.
  • NFC also known as short-range wireless communication, is a short-range high-frequency wireless communication technology that allows electronic devices to exchange data between non-contact point-to-point data transmissions.
  • the principle of electromagnetic induction is that a current generates a magnetic field through a coil, and other unenergized coils generate an induced current close to the magnetic field to realize energy transmission.
  • Portable devices use wireless charging systems that require magnetic field-sensing coils.
  • portable devices require Bluetooth antennas, Wi-Fi antennas, NFC antennas, and other antennas for portable devices, which increases the size of portable devices. Large and inconvenient to use.
  • Wireless charging and NFC technology require coils (or antennas) for energy or data transmission during the work process, customers' demand for the volume and appearance of electronic products, and fierce market competition, which urges manufacturers to strictly control costs. Reasonable layout of hardware modules and control signal flow to achieve wireless charging and NFC shared coils.
  • the present invention realizes the function of sharing the same coil between an NFC and a wireless charging system in a portable device, and is mainly completed by four major modules (as shown in FIG. 1), sharing a coil, a signal judging module, performing NFC, and performing wireless charging.
  • the shared coil is a coil of the receiving end shared by the NFC function and the wireless charging function.
  • the signal judging module is connected to the shared coil, and receives and detects the input signal of the coil.
  • the module is composed of three main sub-modules, namely, 1 signal matching, 2 signal conversion and 3 signal control (as shown in FIG. 1 ), respectively, and 1 signal matching is completed respectively.
  • the function selection conversion antenna impedance to control the signal for NFC function or wireless charging function corresponding input matching, 2 signal conversion - convert RF signal into digital signal, and can provide corresponding stable supply voltage, 3 signal control - will modulation
  • the demodulated signal is compared with a pre-stored NFC ID to determine if the signal is an NFC input signal.
  • the signal judgment module has two key components, and the first switch and the second switch are respectively responsible for selecting and implementing the NFC function and the wireless charging function.
  • the NFC module is connected to the submodule 3 signal control, and is controlled by the first switch.
  • the execution of the wireless charging module is controlled by the second switch.
  • a signal matching sub-module including a 1a matching NFC is responsible for converting the variable resistor into an impedance suitable for the shared coil to complete the NFC function, and transmitting the corresponding NFC signal to the executing NFC module; 1b matching the wireless charger is responsible for the variable The resistance is converted into an impedance suitable for the shared coil to complete the wireless charging function; the 1c function selection is responsible for transmitting the 1a or 1b matched signal to the 2 signal conversion sub-module, and it is possible to return the input signal according to the judgment result of the 3 signal control sub-module.
  • 1a signal matching sub-module including a 1a matching NFC is responsible for converting the variable resistor into an impedance suitable for the shared coil to complete the NFC function, and transmitting the corresponding NFC signal to the executing NFC module; 1b matching the wireless charger is responsible for the variable The resistance is converted into an impedance suitable for the shared coil to complete the wireless charging function; the 1c function selection is responsible for transmitting the 1a or 1b
  • 2 signal conversion sub-module including 2a RF / DC signal converter is responsible for converting the matched wireless signal from the 1 signal matching sub-module into DC current voltage
  • 2b regulator is responsible for stabilizing the incoming DC current voltage of 2a The transmission to the 3 signal control submodule or the second switch.
  • 3 signal control sub-module including 3a modem is responsible for modulating and demodulating the 1a matched wireless signal into a digital signal, 3b storing the NFC ID storing the unique identifier of the NFC identification, and the 3c signal determining comparator is responsible for demodulating the 3a modulation
  • the digital signal is compared with the NFC ID of 3b, or the digital signal demodulated by 3a is compared with the Tx signal transmitted by the NFC module to determine whether the signal is transmitted by the NFC.
  • Figure 1 is a diagram of the NFC and wireless charging shared coil module
  • Figure 2 is a control signal flow chart
  • W5. Trigger the wireless charging function - when the W2 judgment result is NO or the W7 judgment result is NO, that is, the modulated and demodulated signal transmitted by 3a is a wireless charging signal, not an NFC signal, causing the execution of the NFC module to be invalid. And simultaneously turning on the second switch triggers execution of the wireless charging module.
  • Wireless charging - enables the wireless charging module to perform wireless charging for a preset specific time.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A method for NFC and wireless charging to share a coil, comprising the step of starting an NFC execution module or a wireless charging execution module by means of a signal judgement module. The method greatly improves a hardware utilization rate, and enables the volume of a portable device to be effectively utilized and the functions thereof to be richer.

Description

NFC和无线充电共用线圈NFC and wireless charging shared coil
技术领域：无线充电技术(Wireless charging technology)，又称作非接触式感应充电，源于无线电力输送技术，利用近场感应，电感耦合，由供电设备将能量传送至用电装置，该装置使用接收到的能量对电池充电，并同时供其本身运作之用。主流的无线充电标准有三种：Qi标准、PMA标准、A4WP标准。本发明所涵盖的无线充电功能是基于Qi标准的电磁感应技术。NFC又称近距离无线通信，是一种短距离的高频无线通信技术，允许电子设备之间进行非接触式点对点数据传输交换数据。Technical field: Wireless charging technology, also known as non-contact inductive charging, is derived from wireless power transmission technology, using near-field sensing, inductive coupling, and energy is transmitted from a power supply device to a powered device. The received energy charges the battery and is used for its own operation. There are three mainstream wireless charging standards: Qi standard, PMA standard, and A4WP standard. The wireless charging function covered by the present invention is an electromagnetic induction technology based on the Qi standard. NFC, also known as short-range wireless communication, is a short-range high-frequency wireless communication technology that allows electronic devices to exchange data between non-contact point-to-point data transmissions.
背景技术:电磁感应的原理是，电流通过线圈产生磁场，其他未通电的线圈靠近该磁场产生感应电流从而实现能量的传输。便携设备使用无线充电系统，需要产生磁场感应的线圈，除此之外，便携设备还需要蓝牙的天线，Wi-Fi的天线，NFC的天线等等其他设施的天线，这使得便携设备的体积增大，不便于使用。无线充电和NFC技术在工作的过程中都需要线圈(或天线)进行能量或数据的传输，客户对电子产品在体积、外观的苛刻要求，以及市场竞争激烈促使厂商严格的成本控制，本发明通过硬件模块合理布局和控制信号流程实现无线充电与NFC共用线圈。BACKGROUND OF THE INVENTION The principle of electromagnetic induction is that a current generates a magnetic field through a coil, and other unenergized coils generate an induced current close to the magnetic field to realize energy transmission. Portable devices use wireless charging systems that require magnetic field-sensing coils. In addition, portable devices require Bluetooth antennas, Wi-Fi antennas, NFC antennas, and other antennas for portable devices, which increases the size of portable devices. Large and inconvenient to use. Wireless charging and NFC technology require coils (or antennas) for energy or data transmission during the work process, customers' demand for the volume and appearance of electronic products, and fierce market competition, which urges manufacturers to strictly control costs. Reasonable layout of hardware modules and control signal flow to achieve wireless charging and NFC shared coils.
发明内容：本发明在便携设备中实现NFC和无线充电系统共用同一线圈的功能，主要由四大模块(如图1)完成，共用线圈、信号判断模块、执行NFC和执行无线充电。共用线圈是NFC功能和无线充电功能共用的接收端的线圈。信号判断模块连接着共用的线圈，接收并检测线圈的输入信号，模块中由1信号匹配，2信号转换和3信号控制(如图1)三个主要子模块组成，分别完成1信号匹配——根据功能选择转化天线的阻抗来控制信号进行NFC功能或无线充电功能相应的输入匹配，2信号转换——转换RF信号为数字信号，且可以提供相应的稳定供电压，3信号控制——将调制解调出的信号与预存储的NFC ID比较，判断信号是否为NFC输入信号。除此之外，信号判断模块还有两个关键组成部分，第一开关和第二开关分别负责NFC功能与无线充电功能的选择与实施。执行NFC模块连接着子模块3信号控制，由第一开关控制。相应的，执行无线充电模块则由第二开关控制。SUMMARY OF THE INVENTION The present invention realizes the function of sharing the same coil between an NFC and a wireless charging system in a portable device, and is mainly completed by four major modules (as shown in FIG. 1), sharing a coil, a signal judging module, performing NFC, and performing wireless charging. The shared coil is a coil of the receiving end shared by the NFC function and the wireless charging function. The signal judging module is connected to the shared coil, and receives and detects the input signal of the coil. The module is composed of three main sub-modules, namely, 1 signal matching, 2 signal conversion and 3 signal control (as shown in FIG. 1 ), respectively, and 1 signal matching is completed respectively. According to the function selection conversion antenna impedance to control the signal for NFC function or wireless charging function corresponding input matching, 2 signal conversion - convert RF signal into digital signal, and can provide corresponding stable supply voltage, 3 signal control - will modulation The demodulated signal is compared with a pre-stored NFC ID to determine if the signal is an NFC input signal. In addition, the signal judgment module has two key components, and the first switch and the second switch are respectively responsible for selecting and implementing the NFC function and the wireless charging function. The NFC module is connected to the submodule 3 signal control, and is controlled by the first switch. Correspondingly, the execution of the wireless charging module is controlled by the second switch.
由以上分析可以看出，本发明的实施关键是信号判断模块。其中，1信号匹配子模块，包括1a匹配NFC器负责将可变电阻转变为适合共用线圈完成NFC功能的阻抗，并且将相应的NFC信号传输给执行NFC模块；1b匹配无线充电器负责将可变电阻转变为适合共用线圈完成无线充电功能的阻抗；1c功能选择负责将1a或1b匹配好的信号传输给2信号转换子模块，并且根据3信号控制子模块的判断结果有可能将输入信号回传给1a。2信号转换子模块，包括2a RF/DC信号转换器负责由从1信号匹配子模块传入的匹配好的无线信号转换为直流电流电压，2b稳压器负责将2a传入的直流电流电压稳定的传输给3信号控制子模块或者第二开关。3信号控制子模块，包括3a调制解调器负责对1a匹配后的无线信号进行调制解调成数字信号，3b存储的NFC ID存储NFC识别的唯一标识，3c信号判断比较器负责将3a调制解调后的数字信号与3b的NFC ID进行比对，或者将3a调制解调后的数字信号与执行NFC模块传输来的Tx信号进行比对，从而判断是否NFC传输信号。It can be seen from the above analysis that the key to the implementation of the present invention is the signal determination module. Wherein, a signal matching sub-module, including a 1a matching NFC is responsible for converting the variable resistor into an impedance suitable for the shared coil to complete the NFC function, and transmitting the corresponding NFC signal to the executing NFC module; 1b matching the wireless charger is responsible for the variable The resistance is converted into an impedance suitable for the shared coil to complete the wireless charging function; the 1c function selection is responsible for transmitting the 1a or 1b matched signal to the 2 signal conversion sub-module, and it is possible to return the input signal according to the judgment result of the 3 signal control sub-module. Give 1a. 2 signal conversion sub-module, including 2a RF / DC signal converter is responsible for converting the matched wireless signal from the 1 signal matching sub-module into DC current voltage, 2b regulator is responsible for stabilizing the incoming DC current voltage of 2a The transmission to the 3 signal control submodule or the second switch. 3 signal control sub-module, including 3a modem is responsible for modulating and demodulating the 1a matched wireless signal into a digital signal, 3b storing the NFC ID storing the unique identifier of the NFC identification, and the 3c signal determining comparator is responsible for demodulating the 3a modulation The digital signal is compared with the NFC ID of 3b, or the digital signal demodulated by 3a is compared with the Tx signal transmitted by the NFC module to determine whether the signal is transmitted by the NFC.
附图说明：下面结合附图和实施对本发明进一步说明。BRIEF DESCRIPTION OF THE DRAWINGS The invention will be further described below in conjunction with the drawings and embodiments.
图1是NFC和无线充电共用线圈模块图Figure 1 is a diagram of the NFC and wireless charging shared coil module
图2是控制信号流程图Figure 2 is a control signal flow chart
具体实施方式：本发明在便携设备中实现NFC和无线充电系统共用同一线圈的流程如图2所示： DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The flow of the invention in which a NFC and a wireless charging system share the same coil in a portable device is as shown in FIG. 2:
W1.触发NFC功能并关闭无线充电——当3c信号判断比较器收到3a传入的调制解调后的输入信号，在判断信号之前，会首先打开第一开关触发执行NFC模块，并且关闭第二开关失效执行无线充电模块。W1. Trigger NFC function and turn off wireless charging - When the 3c signal judges that the comparator receives the incoming and outgoing modulated signal of 3a, before the judgment signal, the first switch is first turned on to trigger the execution of the NFC module, and the first is turned off. The second switch fails to execute the wireless charging module.
W2.判断解调后信号是否是NFC——执行3c信号判断比较器的功能。W2. Determine whether the demodulated signal is NFC - perform the 3c signal to judge the function of the comparator.
W3.NFC工作——当W2判断结果为是YES，执行NFC模块工作。W3.NFC work - When the W2 judgment result is YES, the NFC module works.
W4.终止NFC——当W3工作完成，执行NFC模块终止。W4. Terminate NFC - When the W3 job is completed, the execution of the NFC module is terminated.
W5.触发无线充电功能——当W2判断结果为否NO或者W7判断结果为否NO，也就是由3a传入的调制解调后的信号为无线充电信号，不是NFC信号，使执行NFC模块失效，并同时开启第二开关触发执行无线充电模块。W5. Trigger the wireless charging function - when the W2 judgment result is NO or the W7 judgment result is NO, that is, the modulated and demodulated signal transmitted by 3a is a wireless charging signal, not an NFC signal, causing the execution of the NFC module to be invalid. And simultaneously turning on the second switch triggers execution of the wireless charging module.
W6.进行无线充电——使执行无线充电模块进行无线充电一段预设的特定时间。W6. Wireless charging - enables the wireless charging module to perform wireless charging for a preset specific time.
W7.无线充电是否完成——判断无线充电是否完成。W7. Is wireless charging completed? Determine if wireless charging is complete.
W8.打开NFC关闭无线充电——当W7判断结果为是YES，打开第一开关触发执行NFC模块，并且关闭第二开关失效执行无线充电模块。 W8. Turn on NFC to turn off wireless charging - When W7 judges that the result is YES, turning on the first switch triggers execution of the NFC module, and turning off the second switch fails to execute the wireless charging module.

Claims (2)

  1. NFC功能和无线充电功能通过信号判断模块实现共用同一线圈的功能；The NFC function and the wireless charging function realize the function of sharing the same coil through the signal judging module;
    通过信号判断比较器判断线圈的输入信号是否为NFC信号，进行相应功能的信号匹配与执行。The signal is judged by the comparator to determine whether the input signal of the coil is an NFC signal, and the signal matching and execution of the corresponding function is performed.
  2. 基于权利1的要求，关闭或开启NFC功能和无线充电功能的执行，避免共用线圈的使用冲突，使得应有的线圈功能响应正常执行。 Based on the requirements of claim 1, the execution of the NFC function and the wireless charging function is turned off or turned on, and the use conflict of the shared coil is avoided, so that the coil function response should be performed normally.
PCT/CN2015/091818 2015-10-13 2015-10-13 Nfc and wireless charging sharing coil WO2017063136A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10210731B2 (en) 2017-06-28 2019-02-19 Datalogic IP Tech, S.r.l. Systems and methods for a smart electronic article surveillance circuit
WO2023072153A1 (en) * 2021-10-27 2023-05-04 维沃移动通信有限公司 Antenna control method and related device

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CN102780515A (en) * 2012-07-26 2012-11-14 中兴通讯股份有限公司 Method and apparatus for achieving compatibility of wireless charging and near field communication (NFC)
CN103683400A (en) * 2013-11-30 2014-03-26 深圳小木科技有限公司 NFC (near field communication) based wireless charging control method and system
CN204442353U (en) * 2015-03-31 2015-07-01 惠州硕贝德无线科技股份有限公司 A kind of wireless charging and NFC communication communal-antenna system
CN105071553A (en) * 2015-08-12 2015-11-18 苏州宝润电子科技有限公司 NFC and wireless charging shared coil

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Publication number Priority date Publication date Assignee Title
CN201663491U (en) * 2010-02-08 2010-12-01 东莞宇龙通信科技有限公司 Electric terminal and NFC charging system
CN102780515A (en) * 2012-07-26 2012-11-14 中兴通讯股份有限公司 Method and apparatus for achieving compatibility of wireless charging and near field communication (NFC)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10210731B2 (en) 2017-06-28 2019-02-19 Datalogic IP Tech, S.r.l. Systems and methods for a smart electronic article surveillance circuit
WO2023072153A1 (en) * 2021-10-27 2023-05-04 维沃移动通信有限公司 Antenna control method and related device

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