CN205354075U - Non -contact card - Google Patents

Non -contact card Download PDF

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Publication number
CN205354075U
CN205354075U CN201521047562.8U CN201521047562U CN205354075U CN 205354075 U CN205354075 U CN 205354075U CN 201521047562 U CN201521047562 U CN 201521047562U CN 205354075 U CN205354075 U CN 205354075U
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CN
China
Prior art keywords
bluetooth
contact card
signal
communication
module
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
Application number
CN201521047562.8U
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Chinese (zh)
Inventor
丁励
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuhai Geehy Semiconductor Co Ltd
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Apex Microelectronics Co Ltd
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Priority claimed from CN201410782498 external-priority
Application filed by Apex Microelectronics Co Ltd filed Critical Apex Microelectronics Co Ltd
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Publication of CN205354075U publication Critical patent/CN205354075U/en
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type
    • H04B5/0025Near field system adaptations
    • H04B5/0037Near field system adaptations for power transfer
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record 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
    • G06K19/067Record 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
    • G06K19/07Record 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
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record 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
    • G06K19/067Record 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
    • G06K19/07Record 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
    • G06K19/0723Record 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
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record 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
    • G06K19/067Record 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
    • G06K19/07Record 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
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record 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
    • G06K19/067Record 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
    • G06K19/07Record 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
    • G06K19/0701Record 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
    • G06K19/0707Record 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 being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type
    • H04B5/02Near-field transmission systems, e.g. inductive loop type using transceiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Abstract

The utility model discloses a non -contact card, it is relatively poor not enough to overcome slow, the with high costs and bulky convenience that leads to of current large capacity non -contact card transmission speed. This card includes NFC module and bluetooth communication module, wherein: the NFC module is used for receiving outside modulating signal and/or carrier signal, and according to modulating signal and/or carrier signal output DC voltage, bluetooth communication module inserts the DC voltage is as working power supply for carry out bluetooth communication with the outside. The utility model overcomes non -contact card's capacity can effectively be utilized to the defect that non -contact card transmission speed is slower for when non -contact card can save abundant information, can carry out information transmission at a high speed.

Description

Non-contact card
This application claims and enjoy in the name that December in 2014 submits on the 15th and be called the Chinese patent application CN201410782498.1 of " Non-contact passive card " and be called the priority of Chinese patent application CN201510039763.1 of " Non-contact passive card " in the name submitted on January 26th, 2015, the full content of those applications is herein incorporated by reference.
Technical field
This utility model relates to the communications field, particularly relates to a kind of non-contact card.
Background technology
A large amount of along with mobile terminals such as smart mobile phones popularize, and increasing information can be undertaken obtaining and pass through the Internet or mobile Internet transmission by mobile terminal.But, can be few either directly through the information source of obtaining information in mobile terminal.Such as traditional USB flash disk (USBFlashDisk) adopts the USB interface of standard, and the mobile terminals such as mobile phone often adopt miniUSB or microUSB interface, owing to the mobile terminals such as interface and host-host protocol etc. are not corresponding, mobile phone can not read the information in USB flash disk easily and directly.There is the problem that can not read information easily too in portable hard drive.By installing WiFi or bluetooth module on existing hard disk additional, the mobile terminals such as mobile phone are by the data in self bluetooth module or WiFi module access hard disk, jumbo information source can also be provided to mobile terminals such as mobile phones, but this needs to add packed battery to provide sufficiently large electrical power to hard disk, and the hard disk volume adding battery will more strengthen, and is not convenient for carrying.
Along with supporting NFC (NearFieldCommunication, the short distance wireless communication technology, also known as near-field communication) mobile terminal (such as mobile phone) more and more universal, obtaining information by NFC module is one approach very easily, has occurred in that the electronic business card (NFC business card) of application NFC technique at present.These NFC business cards except at two surface printing master messages (such as name, position, phone etc.) of business card as traditional business card in kind, can also embedded in NFC module inside business card.When in NFC module, storage has card information, it is only necessary to closely pressing close to support the mobile terminal of NFC by NFC business card, mobile terminal just can quickly and accurately read the master message in NFC business card.
NFC is the radiotechnics of a kind of short distance high frequency, runs 13.56 megahertzs of (MHz) frequencies, in general 10 cm distance of communication distance, sets up the Connection Time less than 1 second.At present, its transmission speed has 106 kilobits (kbit)/second, 212kbit/ second or 424kbit/ second three kinds.NFC has passed through becomes ISO/IEC18092 international standard, EMCA-340 standard and ETSITS102190 standard.
NFC adopts actively and passively two kinds of read modes.Owing to NFC is point-to-point communication, and communication distance is short, and user can control to read the spread scope of NFC business card easily, it is to avoid the information in NFC business card is obtained by other people without agreement, has higher safety.
But, existing NFC control chip only has several kilobytes (Kilobyte, the KB) capacity to tens kilobytes, is only suitable for storage plain text information.Along with the development of multimedia technology, it is desirable to NFC business card and can carry the multimedia messages such as picture, sound even video, such NFC business card can propagate more information to other people, can improve the attention rate of business card recipient.But, the storage of multimedia messages needs with a Mbytes (Megabyte, MB) for memory capacity that unit is even bigger, although the memory capacity merely expanding NFC business card can solve capacity problem, even but transmit the multimedia messages in units of MB with the current maximum transmission speed 424kbit/ second, it is also required to the transmission time of even hundreds of second up to a hundred, it is clear that this is all receptible speed of both sides making it difficult for exchange NFC business card.And practical situation is, when adopting the mobile terminals such as mobile phone, since it is considered that power consumption and interference problem, transmission speed is far below the maximum transfer speed in NFC communication agreement.
Because plurality of advantages such as the conveniences of operation, obtaining information by non-contacting mode is becoming increasingly popular, for instance mass transit card, medical card, access card, visa card, the pass etc. obtain application rapidly and universal.But, the same with the above-mentioned electronic business card based on NFC, these non-contact cards have the feature that information memory capacity is little, when needs store jumbo information in card, existing communication speed is very slow, it is impossible to meet the high speed transmission demand that user is growing.If considering to increase WiFi or bluetooth module to these non-contact cards, although the problem that transmission speed is slow can be solved, but, thus need on non-contact card, to set up supplying cell to support the work of communication module.Obviously, so may result in the cost of non-contact card and volume greatly increases, it is difficult to non-contact card is carried out Miniaturization Design and production.
Therefore it provides a kind of portability is good and data transmission bauds non-contact card faster is needs.
Utility model content
Technical problem to be solved in the utility model is to overcome the deficiency that Large Copacity non-contact card transmission speed of the prior art is slow, cost is high and volume causes greatly convenience poor.
This utility model provide firstly a kind of non-contact card, including NFC module and bluetooth communication, wherein: described NFC module is for receiving modulation signal and/or the carrier signal of outside, and exports DC voltage according to described modulation signal and/or carrier signal;Described bluetooth communication accesses described DC voltage as working power, for carrying out Bluetooth communication with outside.
Preferably, described bluetooth communication only uses described DC voltage as working power.
Preferably, this non-contact card includes: power storage module, for utilizing the DC voltage that described NFC module exports to be charged, independently or be powered for described bluetooth communication together with described NFC module.
Preferably, the instantaneous power of described bluetooth communication is not more than the power of described NFC module output DC voltage.
Preferably, described NFC module includes: coupled antenna, for receiving modulation signal and/or the carrier signal of outside;Change-over circuit, modulation signal and/or carrier signal for described coupled antenna is received carry out rectification and voltage stabilizing, export described DC voltage.
Preferably, described bluetooth communication includes: Bluetooth antenna, is used for the Bluetooth signal outside external emission Bluetooth signal or reception;Bluetooth main control module, is used for accessing described DC voltage as working power, is demodulated for modulating the generation described Bluetooth signal to external emission and/or the described Bluetooth signal to external reception.
Preferably, described bluetooth main control module is configured to reduce transmitting power, reduces traffic rate or reduces receiving sensitivity to reduce power consumption.
Preferably, described bluetooth main control module farther includes internal storage, for storing data for described Bluetooth communication;The capacity of described internal storage is more than 200 kilobytes.
Preferably, described non-contact card includes: external memory storage;Described bluetooth main control module farther includes internal storage;Described external memory storage and described internal storage are used for storing the total capacity of data, described external memory storage and described internal storage more than 200 kilobytes for described Bluetooth communication.
Compared with prior art, this utility model overcomes the defect that non-contact card transmission speed of the prior art is slower, can effectively utilize the capacity of non-contact card so that while non-contact card can store abundant information, information transmission can be carried out at high speed.Non-contact card energy consumption of the present utility model is little, without being independently arranged battery, improve portability and the safety of non-contact card, and in user's use procedure without non-contact card is charged, it is to avoid non-contact card is carried goes out or in work process, electricity is not enough and the risk brought.
Other features and advantages of the utility model will be set forth in the following description, and, partly become apparent from description, or understand by implementing the technical solution of the utility model.The purpose of this utility model and other advantages can be realized by structure specifically noted in description, claims and accompanying drawing and/or flow process and be obtained.
Accompanying drawing explanation
Accompanying drawing is used for providing being further appreciated by the technical solution of the utility model or prior art, and constitutes a part for description.Wherein, the accompanying drawing expressing this utility model embodiment is used for explaining the technical solution of the utility model together with embodiment of the present utility model, but is not intended that the restriction to technical solutions of the utility model.
The organigram of the various non-contact cards of Fig. 1 to Fig. 7 respectively this utility model embodiment.
Fig. 8 be the non-contact card of this utility model embodiment when application with the schematic flow sheet of the communication connection of mobile terminal.
Fig. 9 is the non-contact card of this utility model embodiment schematic flow sheet when communication.
Figure 10 is the schematic flow sheet of the non-contact card of this utility model embodiment in-line power when operation.
Detailed description of the invention
Describing embodiment of the present utility model in detail below with reference to drawings and Examples, to this utility model, how application technology means solve technical problem whereby, and the process that realizes reaching relevant art effect can fully understand and implement according to this.Each feature in this utility model embodiment and embodiment, can be combined with each other under not colliding premise, and the technical scheme formed is all within protection domain of the present utility model.
Non-contact card alleged by this utility model, refer to and do not rely on built-in battery or power storage module etc. as power supply, without being wired to power supply, carry out a kind of electronic card of self-power supply just energy normal operation only by the electric energy extracted from radio frequency signal;Certainly, for stably working of non-contact card, being extracted on the basis that electric energy is powered by radio frequency signal, non-contact card is set up battery or storage capacitor carrys out back work, the category of non-contact card of the present utility model must be belonged to.
Embodiment one
As it is shown in figure 1, the non-contact card of this utility model embodiment, it mainly includes coupled antenna 11, change-over circuit 12, bluetooth main control module 13 and Bluetooth antenna 14.Coupled antenna 11 is for receiving the modulation signal that centre frequency is first frequency of outside and/or unmodulated carrier signal.Change-over circuit 12 is connected to coupled antenna 11, for receiving modulation signal and/or carrier signal carries out rectification and voltage stabilizing, exporting DC voltage.Bluetooth main control module 13 is connected to Bluetooth antenna 14 and change-over circuit 12, uses the DC voltage that this change-over circuit 12 exports as working power.
Those skilled in the art it will be appreciated that, the modulation signal that centre frequency is first frequency of coupled antenna 11 reception in this utility model and/or carrier signal, include centre frequency close to the modulation signal of first frequency and/or carrier signal, or centre frequency is the modulation signal near first frequency and/or carrier signal.It practice, the optional frequency that the technical solution of the utility model is suitable in certain frequency range preset.Such as, in scheme of the present utility model, this first frequency can be 13.56MHz, it is also possible to be a frequency range centered by 13.56MHz.It addition, modulation signal, refer to and have passed through modulation, addition of the signal of the information needing transmission.And carrier signal, then refer to but without being modulated, without the signal of the information needing transmission.
The non-contact card of this utility model embodiment is in use, can obtain circuit by means of the power supply in NFC module and realize.In NFC communication system, include NFC read write line and corresponding NFC label.In this utility model, the circuit structure in NFC label is described as NFC module, in NFC read write line and NFC label, each self-contained for communicating and transmitting the coupled antenna of electric energy.The coupled antenna 11 of the present embodiment has a coil, and it is for receiving the modulation signal of outside and/or unmodulated carrier signal.The modulation signal of the outside said here and/or unmodulated carrier signal, refer to modulation signal and/or unmodulated carrier signal that NFC read write line sends to NFC label, this NFC read write line can be arranged in fixing terminal, it is also possible to is arranged on mobile terminal (such as mobile phone).
Power supply by means of NFC module obtains the non-contact card that circuit realizes, and obtains electric energy from NFC read write line by coupled antenna 11.And the carrier frequency of NFC communication is 13.56MHz, then the centre frequency of coupled antenna 11 is close with 13.56MHz, due to the deviation of system, coupled antenna is also possible to receive and process modulation signal or the carrier signal of (such as frequency is within 13.56MHz positive and negative 10%) within the certain frequency scope containing 13.56MHz.Outside modulation signal is generally sent by above-mentioned NFC read write line, and in this utility model, NFC read write line is generally located on mobile terminal, for instance on mobile phone.In order to save power supply, NFC read write line can periodically (such as every 0.5 second) to emission carrier signal or modulation signal (i.e. card seeking instruction or be search instruction), search for neighbouring NFC label, without sending carrier signal constantly;When NFC read write line needs externally transmission signal, carrier signal can be modulated, the information that affix to be transmitted, form modulation signal.Certainly, not sending carrier signal constantly is go out to send setting from the angle of energy efficient, and therefore actually this utility model is not precluded from NFC read write line and sends the situation of carrier signal constantly.
The AC signal received is converted to DC voltage by change-over circuit 12, to provide working power to other modules of non-contact card.It is said that in general, change-over circuit 12 includes rectifying part and voltage stabilization part, alternating voltage is transformed to the positive voltage that ripple voltage is bigger by rectifying part, is generally adopted rectifier bridge and realizes.And voltage stabilization part is by floating for ripple voltage so that output voltage stabilization and mild, it is ensured that the job stability of bluetooth main control module and NFC module.
For realizing the voltage stabilizing of DC voltage is exported, conventional way is to adopt LDO (LowDropoutRegulator, low pressure difference linear voltage regulator) circuit as voltage regulation unit.The advantage of LDO is that noise is little, quiescent current is low.It is of course also possible to adopt DC/DC change-over circuit as voltage regulation unit, DC/DC change-over circuit is the one of switching power circuit, and the efficiency that advantage is than LDO is high, but shortcoming to be Ripple Noise relatively larger.Employing DC/DC change-over circuit can reduce electric energy loss during voltage stabilizing.
Bluetooth main control module in this utility model embodiment, there is with existing bluetooth main control module similar structure composition, mainly include link layer (linklayer), radiofrequency signal processing unit (RF), memory element (EEPROM, flash memory, phase transition storage, ferroelectric memory, ROM, ERPOM, MTP etc.) and control unit (CPU and RAM).It is understood that the memory element in bluetooth main control module is desirably integrated in bluetooth main control module, for instance Embedded flash storage;It can also be external memorizer, for instance external SD card.Bluetooth main control module is mainly used in the signal received from Bluetooth antenna being processed and responding.
Bluetooth main control module in this utility model embodiment, the difference main with existing bluetooth main control module, is that bluetooth main control module of the present utility model uses the DC voltage of change-over circuit output as working power.On the other hand, and consider that the DC voltage that change-over circuit is converted to derives from NFC read write line, the power of its supply is less, therefore the bluetooth communication (containing the complete blue-tooth device of Bluetooth antenna) of bluetooth main control module of the present utility model and routine is otherwise varied again, and its overall power should be less than the power consumption of standard bluetooth communication module.
The overall power affecting bluetooth main control module has several main factor, including transmitting power, traffic rate and receiving sensitivity etc., this utility model can reduce the power consumption of bluetooth main control module when application by reducing the modes such as transmitting power, reduction traffic rate or reduction receiving sensitivity.
Preferentially, in this utility model, bluetooth main control module is configured to the decibel value of transmitting power and is not more than-1dBm.
For the bluetooth main control module CC2540 of TI (TexasInstruments) company, it supports that 4 kinds of transmitting powers select: 4dBm, 0dBm ,-6dBm and-23dBm, defines by wireless power: LdBm=10*log10(Pwr/1mW), above 4 kinds of decibel value (LdBm) it being converted into watt (Pwr) and is: 2.51mW, 1mW, 0.251mW and 0.005mW, the receiving sensitivity of receiving terminal is when-90dBm, and effective communication distance is respectively as follows: 30 meters, 10 meters, 7 meters and 3 meters.And suitable in the communication distance of this utility model application scenario, it is generally less than 1 meter, for instance in use, the distance between mobile terminal and non-contact card only has 10 centimetres or less than 10 centimetres.
When free-space propagation, there is the calculation expression of following radio wave propagation loss in signal:
[Lfs] (dB)=32.44+20lgd (km)+20lgf (MHz) formula (1)
In formula, Lfs is loss, and unit is dB;D is transmission range, and unit is km;F is operating frequency, and unit calculates with MHz.
From above formula, in free space, radio wave propagation loss (also known as decay) is only relevant with operating frequency f and propagation distance d.So-called free-space propagation, radio wave propagation when referring to around antenna as infinitely great vacuum, it is ideal propagation condition.Electric wave is when free-space propagation, and its energy both will not be absorbed by barrier, without producing reflection or scattering.
And airwave communication distance is relevant with transmitting power, receiving sensitivity and operating frequency.Assume the communication distance between non-contact card of the present utility model and mobile terminal be 10 centimetres and signal at free-space propagation, the loss obtaining Bluetooth communication signals (carrier wave is 2.4GHz) can be calculated according to above-mentioned formula:
Lfs=32.44+20 × lg (0.1/1000)+20 × lg (2400)=32.4-80+67.6=20dB formula (2)
Receiving sensitivity if placed at the bluetooth communication of mobile terminal is-40dBm, then the transmitting power of non-contact card should be-40+20=-20dBm.This is the calculated relationship of transmission range ideally, transmitting power and receiving sensitivity.In actual application, loss can more than 20dB, this is because radio communication to be subject to the impact of various extraneous factor, such as the loss that air, obstacle, multipath etc. cause.Therefore, even if the transmitting power of 0dBm, if be applied in transmission environment severe when, effective communication distance can less than 10 meters;And, if the receiving sensitivity of receiving terminal is poor, it will shorten effective communication distance further.
Visible, when loss is for determining value, transmitting power is more high, and effective communication distance is more remote.Thus, taking into account the short-range applied environment of non-contact card of the present utility model, reduce transmitting power, be the mode of a kind of reduction bluetooth main control module power consumption being not result in communication disruption.On the other hand, owing to the receiving sensitivity of the bluetooth communication of mobile terminal can there are differences, during receiving sensitivity height, the transmitting power of the bluetooth main control module of non-contact card can be arranged to less.But, when receiving sensitivity is poor, then needs to improve the transmitting power of bluetooth main control module, just can ensure that Bluetooth communication will not be interrupted.Therefore, the transmitting power of the bluetooth main control module of non-contact card can not be configured too small.
Therefore, in order to save power supply, bluetooth main control module in this utility model embodiment, transmitting power is configured to decibel value and is not more than-1dBm less than 0dBm, can select to be configured between-1dBm to-99dBm (-1dBm or-99dBm can be equal to), such as-3dBm ,-15dBm ,-20dBm ,-30dBm ,-40dBm ,-50dBm ,-60dBm ,-80dBm, even can be configured to be low to moderate-110dBm, so ensureing on the basis of efficient communication, reduce energy resource consumption as far as possible.
In order to improve the receiving sensitivity of bluetooth communication, it is generally required to introduce more complicated algorithm or increase progression or the amplification etc. of signal amplification circuit, these all can cause the increase of circuit scale, thus increasing the power consumption of bluetooth communication.Therefore, reduce receiving sensitivity by reducing the modes such as the complexity of algorithm, the progression reducing signal amplification circuit or amplification, be the power consumption that can reduce bluetooth main control module.
Additionally, in the memory element of bluetooth main control module, it is possible to the various information that storage business card in general sense comprises, for instance name, address, phone, position and network address etc..In addition, owing to non-contact card of the present utility model is jumbo card, except the above-mentioned stored simple text information of business card in general sense, the various multimedia messages such as icon, picture, voice, music, animation and video can also be stored, and document, software etc., particularly in the content of the comprehensive media information such as the company profile of business application, catalogue, promotional videos.Compare existing non-contact card, memory element of the present utility model needs to store above listed some or all of multimedia messages, therefore, need to adopt the memorizer that several crossed joints are big than in prior art, preferably, memory element of the present utility model is the memorizer more than or equal to 200 kilobytes (kilobyte), for instance 256 kilobytes, 512 kilobytes, 1M byte, 2M byte and 4M byte etc., or the memory element of more capacity.
Application scenario needs according to non-contact card of the present utility model, various information can be stored in the memory unit associativity, such as, when non-contact card of the present utility model being used as the electronics brochure at product, personage, enterprise, event or sight spot, it is possible to storage is about the data of these projects in the memory unit.When as electronic menu, then can store the information of various dish in the memory unit, for instance the information such as materials, taste, price, picture and eating method.When as greeting card, Gift Card, invitation card, it is possible to storage blessing language, concrete happy event etc. compare the content that existing paper material is more rich in the memory unit.It will be understood to those skilled in the art that memory element generally all stores the base attribute information about bluetooth main control module, for instance bluetooth device name and address information.
Owing to existing bluetooth communication is generally adopted actively powered mode, need not consider that whether power consumption is excessive, so non-contact card of the present utility model, solve its powerup issue, just be avoided that and battery or external power supply are set on non-contact card.By coupled antenna 11 and change-over circuit 12, efficiently solve the powerup issue of bluetooth main control module.In addition, it is contemplated that the application scenario of the less problem of electric energy that can obtain of coupled antenna 11 and this utility model non-contact card, it is possible to bluetooth main control module is configured to transmitting power decibel value and is not more than-1dBm.This is because, conventional blue-tooth device, common receiving sensitivity is more than-80dBm, and non-contact card of the present utility model, need the read write lines such as mobile phone in use, communication distance about 10cm or within (i.e. 0 to 10cm), therefore, power consumption in order to reduce bluetooth module of the present utility model guarantees the RSSI (ReceivedSignalStrengthIndicator in distance non-contact card about 30cm scope simultaneously, received signal strength indicator) more than-80dBm, the transmitting power of bluetooth main control module is not more than-1dBm just can meet the two condition simultaneously.
Embodiment two
As in figure 2 it is shown, embodiment of the present utility model additionally provides another non-contact card, it includes centre frequency coupled antenna 21 near 13.56MHz, change-over circuit 22 and the carrier frequency wireless communication module 23 higher than 13.56MHz.Coupled antenna 21 is for receiving the modulation signal of outside and/or unmodulated carrier signal.Change-over circuit 22 is connected to coupled antenna 21, for receiving modulation signal and/or carrier signal carries out rectification and voltage stabilizing, exporting DC voltage.Wireless communication module 23 is connected to described change-over circuit 22, uses the DC voltage of change-over circuit 22 output as working power, is configured to adopt the carrier wave higher than 13.56MHz to carry out radio communication.
Coupled antenna 21 has a coil, and it is for receiving the modulation signal of outside and/or unmodulated carrier signal.In the present embodiment, non-contact card obtains electric energy from NFC read write line by coupled antenna 21, and the carrier frequency of NFC communication is 13.56MHz, the centre frequency of coupled antenna 21 should be close with this, due to the deviation of system, coupled antenna is also possible to receive and to process frequency modulation signal within 13.56MHz positive and negative 10% or carrier signal.Adopting frequency is the 13.56MHz communication system as carrier wave, also has RFID (radiofrequencyidentification, radio frequency identification) communication system, and therefore outside modulation signal and carrier signal can be from rfid interrogator.Additionally, coupled antenna can also be 125kHz coupled antenna, its centre frequency is 125kHz, and this is the carrier frequency that another RFID communication system adopts.
Change-over circuit 22, it is connected to coupled antenna 21, for the modulation signal received and carrier signal are carried out rectification and voltage stabilizing, exports DC voltage.The AC signal received is converted to DC voltage by change-over circuit 22, to provide working power to other modules of non-contact card.It is said that in general, change-over circuit 22 includes rectifying part and voltage stabilization part, alternating voltage is transformed to the positive voltage that ripple voltage is bigger by rectifying part, and voltage stabilization part is by floating for ripple voltage so that output voltage stabilization and mild.
Wireless communication module 23 uses DC voltage that change-over circuit 22 exports as working power.Wireless communication module 23 is configured to adopt the carrier wave higher than 13.56MHz to carry out radio communication.When coupled antenna is 125kHz coupled antenna, wireless communication module 23 is configured to adopt the carrier wave higher than 125kHz to carry out radio communication.
The overall power affecting wireless communication module has several main factor, including transmitting power, traffic rate and receiving sensitivity, it is possible to reduce the power consumption of wireless communication module by reducing transmitting power, reduce traffic rate or reducing the modes such as receiving sensitivity.
Similar with previous embodiment, owing to the working power of change-over circuit 22 supply is limited, in order to avoid the power consumption of wireless communication module 23 is excessive and cannot work, consider the application scenario of the non-contact card of this utility model embodiment, namely within communication distance is typically in 0.1 meter of scope, therefore the transmitting power of wireless communication module can be reduced, thus reducing the power consumption of wireless communication module 23.Existing wireless telecommunications system, its receiving sensitivity is typically in about-80dBm, supersensitive individually can reach-97dBm.Therefore, under assuming the highly sensitive situation of-80dBm that the receiving sensitivity of receiver of mobile terminal is general, it is possible to reduce the transmitting power of wireless communication module as much as possible.Can first determine an effective communication distance, then, determine transmitting power, guarantee the RSSI value receiving sensitivity more than receiver of any point in effective communication distance, and more than the RSSI value of any point of this effective communication distance less than the receiving sensitivity of receiver, in this case, transmitting power is sufficiently small and can ensure that communication will not be interrupted.
Preferably, when wireless communication module 23 is configured to adopt the carrier wave being higher than 13.56MHz to emission signal, it is not more than-100dBm with the RSSI value of arbitrary reception point (centered by non-contact card, radius is any point on the sphere of predeterminable range) at the predeterminable range place of wireless communication module 23.The read write lines such as such configuration, namely can ensure that in predeterminable range, mobile terminal can effectively receive the signal of wireless communication module 23, the power consumption being also avoided that wireless communication module 23 excessive and because electricity shortage cannot work.In this utility model, predeterminable range can be 0.1 centimetre (cm) to 10cm, or ratio 0.1cm closer distance, then or the distance more farther than 10cm, can set according to practical situations.
In this utility model, wireless communication module 23, can be that bluetooth communication, Zigbee communication module or WiFi communication module etc. adopt the carrier wave higher than 13.56MHz to carry out the module of radio communication, its communication speed is higher than existing NFC communication speed, therefore can overcome the shortcoming that in prior art, non-contact card communication speed is slow.Those skilled in the art is known, ZigBee is based on the low-consumption wireless interconnection technique of IEEE802.15.4 standard, can be operated in 2.4GHz (Global prevalence), 868MHz (Europe is popular) and 3 frequency ranges of 915MHz (U.S. is popular);WiFi communication module is WLAN (WirelessFidelity) communication equipment based on IEEE802.11 series standard.
In embodiment of the present utility model, wireless communication module 23 includes the composition that the conventional wireless communication module such as communication antenna, memory element and main control unit comprises, main control unit receives the carrier frequency modulation signal higher than 13.56MHz by communication antenna and sends modulation signal, modulation signal is demodulated and processes by main control unit, as required to needing the data being sent out to be modulated.
In the memory element of wireless communication module 23, the information that business card comprises in general sense can be stored, such as name, address, phone, position and network address etc., in addition, owing to non-contact card of the present utility model is jumbo card, then except these simple text information, the various multimedia messages such as icon, picture, voice, music, animation and video can also be stored, and document, software etc., particularly in the content of the comprehensive media information such as the company profile of business application, catalogue, promotional videos.Application scenario needs according to non-contact card of the present utility model, various information can be stored in the memory unit associativity, such as, when non-contact card of the present utility model being used as the electronics brochure at product, personage, enterprise, event or sight spot, it is possible to storage is about the data of these projects in the memory unit.When as electronic menu, then can store the information of various dish in the memory unit, for instance the information such as materials, taste, price, picture and eating method.It will be understood to those skilled in the art that memory element generally all stores the base attribute information about wireless communication module 23, for instance device name and address information.Compare existing non-contact card, the memory element of wireless communication module needs to store above listed some or all of multimedia messages, therefore, need to adopt the memorizer that several crossed joints are big than in prior art, preferably, in the present embodiment, the memory element of wireless communication module is more than or equal to 200 kilobytes (kilobyte), the memorizer of the bytes such as such as 256 kilobytes, 512 kilobytes, 1M byte, 2M byte and 4M byte, or the memory element of more capacity.
Embodiment three
As it is shown on figure 3, the non-contact card of this utility model embodiment, it mainly includes NFC module and bluetooth communication, and NFC module includes 13.56MHz coupled antenna 31 and change-over circuit 32, and bluetooth communication includes bluetooth main control module 34 and Bluetooth antenna 33.13.56MHz coupled antenna 31 is for receiving the modulation signal of outside and/or unmodulated carrier signal.The generally alleged coupled antenna of those skilled in the art has a coil.
Change-over circuit 32 is connected to 13.56MHz coupled antenna 31, for receiving modulation signal and/or carrier signal carries out rectification and voltage stabilizing, exporting DC voltage.The alternating voltage received is converted to DC voltage by change-over circuit, to provide power supply to other modules of non-contact card.Bluetooth main control module 34 is connected with change-over circuit 32, uses the DC voltage of change-over circuit 32 output as working power.
Bluetooth main control module 34, is connected to Bluetooth antenna 33, on the one hand for demodulating the modulation signal received from Bluetooth antenna 33, and to will being modulated by the data that Bluetooth antenna 33 sends.On the other hand, according to the signal that obtains of demodulation, from the internal storage of self, read data or to write data in the internal storage of self.That is, the internal storage in bluetooth main control module 34 is used for storing the data carrying out Bluetooth communication.
When internal storage capacity at bluetooth main control module 34 self is less and is difficult to the demand meeting Bluetooth communication, it is necessary to extended storage capacity.To this, embodiment of the present utility model can also increase external memory storage 35 as shown in Figure 3, jointly to store the data for carrying out Bluetooth communication with the internal storage in bluetooth main control module 34.External memory storage 35 connects change-over circuit 32 and bluetooth main control module 34, receives the DC voltage of change-over circuit 32 output as working power.In this case, the internal storage that bluetooth main control module 34 carries is together with external memory storage 35, it is possible to be generically and collectively referred to as memorizer, is used for storing bluetooth main control module 34 and carries out the data of Bluetooth communication.
Adopting frequency is the 13.56MHz communication system as carrier wave, mainly there are NFC communication system and RFID (radiofrequencyidentification, radio frequency identification) communication system, outside modulation signal and carrier signal can be from NFC read write line, it is also possible to originate from rfid interrogator.Additionally, coupled antenna can also be 125kHz coupled antenna, its centre frequency is 125kHz, and this is the carrier frequency that another RFID communication system adopts.
NFC is modulated for signal, is generally the frame signal with prescribed form.NFC communication adopts amplitude shift keying (AmplitudeShiftKeying, the ASK) modulation system of low amplitude, the modulation and demodulation of amplitude shift keying, is well known to those skilled in the art.Owing to the carrier frequency of NFC communication is 13.56MHz, the centre frequency of coupled antenna should be close with this.Outside modulation signal is generally sent by NFC read write line, and in this utility model, NFC read write line is generally located on mobile terminal, for instance on mobile phone.When NFC read write line outwards transmission modulation signal with when communicating in NFC label about, in order to save power supply, NFC read write line in addition also can periodically (such as every 0.5 second) to emission carrier signal or modulation signal (i.e. card seeking instruction or be search instruction), search for neighbouring NFC label.
In the bluetooth main control module of the non-contact card of this utility model embodiment, it is also possible to include clock circuit, be connected with Bluetooth antenna, it is for detection from the modulation signal received by Bluetooth antenna and extracts clock signal, and this clock signal can be used for Bluetooth communication.
The non-contact card of this utility model embodiment, it is also possible to include clocked processing circuits.This clocked processing circuits, it is connected to 13.56MHz coupled antenna, for detection from the modulation signal received and extraction clock signal.In NFC communication, define an ETU (ElementaryTimeUnit, Elementary Time Unit), the duration of each ETU is the time of one bit (bite) of transmission, according to 1ETU=128/fc, and fc=13.56MHz, then an ETU is 9.44 microseconds.When NFC module adopts external clock to carry out signal sampling, by counting the signal period of 128 carrier signals over the carrier signal, it is used as an ETU.
But, owing to NFC module can process some operations self needed, these operations are likely to be not required to the so high clock frequency of 13.56MHz, consider from saving the energy, can adopting the internal clock circuit of the more low frequency comparatively speaking of inside, it is produced by the mode such as crystal oscillator or programmable oscillator.By internal clock circuit, as long as modulation signal or demodulation signal are just sampled by every timing to 9.44 microseconds (ETU), without the carrier signal in 128 cycles of counting.In this case, in other embodiments of the present utility model, above-mentioned clocked processing circuits is not set in non-contact card, but internal clock circuit is set to realize the synchronization of clock.The frequency of oscillation of this internal clock circuit can be more high or low than 13.56MHz.
Memorizer can store the information that business card comprises in general sense, such as name, address, phone, position and network address etc., in addition, owing to non-contact card of the present utility model is jumbo card, then except these simple text information, other multimedia messages such as icon, picture, voice, music, animation and video can also be stored, particularly in the content of the comprehensive media information such as the company profile of business application, catalogue, promotional videos, and document, software etc..Application scenario needs according to non-contact card of the present utility model, various information can be stored in associativity ground in storage circuit, such as, when non-contact card of the present utility model being used as the electronics brochure at product, personage, enterprise, event or sight spot, it is possible in storage circuit, storage is about the data of these projects.When as electronic menu, then can store the information such as various dish, beverage in storage circuit, for instance the information such as materials, taste, price, picture and eating method.Memorizer can also store device name and the address information of bluetooth communication.Preferably, in this utility model, the memory element of wireless communication module is more than or equal to 200 kilobytes (kilobyte), for instance the memorizer of the bytes such as 256 kilobytes, 512 kilobytes, 1M byte, 2M byte and 4M byte, or the memory element of more capacity.
Bluetooth main control module generally comprises signal transmitting and receiving processing unit, clock unit, control unit etc., has been well known to those skilled in the art, has been not repeated herein.
The overall power affecting bluetooth main control module has several main factor, including transmitting power, traffic rate and receiving sensitivity etc., this utility model can reduce the power consumption of bluetooth main control module by reducing the modes such as transmitting power, reduction traffic rate or reduction receiving sensitivity.
Bluetooth communication common in prior art generally all supports the communication distance of about 10 meters, and therefore power consumption during its work is general all relatively larger, powers iff the conversion portion utilizing 13.56MHz module, then the problem that there is electricity shortage.Transmitting power when the transmitting power consumption of bluetooth communication includes quiescent dissipation when bluetooth main control module internal circuit works and launches signal, launches power consumption relevant with transmitting power.Transmitting power is main relevant with two factors, first effective communication distance, and distance is more remote, and required transmitting power is more big;It two is traffic rate, and the more fast then transmitting power of traffic rate is more big.
In order to reduce power consumption during non-contact card communication, bluetooth communication of the present utility model preferably supports the bluetooth communication of BLE (BluetoothLowEnergy, low-power consumption bluetooth) 4.0.Still further aspect, for reducing transmitting power consumption further, bluetooth communication of the present utility model is the bluetooth communication improved, and it reduces the transmitting power of bluetooth communication by reducing the mode of effective communication distance.Such as, consider that the application form of the non-contact card of utility model is generally user's hand-held mobile terminal, then non-contact card is pressed close to the form that mobile terminal conducts interviews, then the maximum communication distance of bluetooth communication can be limited to such as 0 to 10cm, for instance within 1cm, 2cm, 3cm, 4cm, 5cm, 7cm, 9cm etc. 0.1 meter.The power of the DC voltage according to change-over circuit output, bluetooth communication adjusts the transmitting power of self, to reduce the power consumption of bluetooth communication, and then reduces the power consumption of whole non-contact card.Such as, the transient transmission power of bluetooth main control module is not more than the output of change-over circuit.Preferably so that bluetooth communication be configured to maximum communication distance carry out signal launch time, instantaneous transmission power consumption is less than the power of (namely less than or equal to) change-over circuit output.
Reduce effective communication distance, typically via the transmitting power reducing bluetooth main control module, be about to drive the mode of current reduction to realize.Therefore, when hope transmitting power consumption is little as far as possible, it is possible to restriction effective communication distance is the distance only pressed close to, for instance within 1 centimetre.Now, according to the conversion relation (the free-space propagation loss calculation formula in such as embodiment one) between effective communication distance and transmitting power, transmitting power is reduced to the value of correspondence.By adjusting the transmitting power of bluetooth main control module, driving electric current when launching signal will be directly affected, according to the conversion relation between effective communication distance and driving electric current, the value that electric current will be driven to be reduced to correspondence.
And the communication distance of application scenario of the present utility model is generally less than 0.1 meter, for instance 5cm, therefore, in order to save power supply, it is possible to the decibel value of configuration bluetooth main control module transmitting power is less than-1dBm, it is possible to select--1dBm is extremely--99dBm, even as low as-110dBm.
The power consumption when communication of the bluetooth main control module is interim, such as in a communication cycle 6.25ms set, front 1.25ms is used for receiving and send modulation signal, transient current is crest value, after 1.25ms, for bluetooth main control module, the modulation signal received carried out inter-process (include but not limited to demodulation, deciphering, calculate, write and reading etc.) and processed stage of rear dormancy, now operating current ratio is shallower, power consumption is smaller, especially when dormancy, operating current is static work, only some μ A.
In order to reduce the power consumption of bluetooth main control module, a kind of way is to be extended by communication cycle, thus reducing mean power.Such as communication cycle being adjusted 12.5ms, so, the reception high due to power consumption and transmission modulation time shared by signal do not change, and dormancy time adds, it is possible to reduce mean power.
Therefore, in order to reduce the transmitting power of bluetooth main control module, other embodiments of the present utility model realize by reducing the mode of traffic rate, or reduce effective communication distance simultaneously and reduce traffic rate.Obviously the mode reducing effective communication distance can more efficiently reduce the transmitting power of bluetooth main control module, and therefore often preferential reduction drives electric current, then just considers to reduce traffic rate.
In addition, it is contemplated that non-contact card of the present utility model is more applicable to the occasion of public information, for instance name card, product manual card, menu card etc., stored information need not be maintained secrecy by it.Therefore, in order to reduce the power consumption of card, can consider in some application scenario Conventional Bluetooth main control module to remove the hardware module being mainly used to realize the functions such as encryption, certification or checking, only retain in the card (such as fiscard, medical card) of specific demand.So, the solution mediation modulated process of signal, just minimizing can process step comparatively speaking, thus reducing power consumption while improving treatment effeciency;On the other hand, also reducing the circuit scale of bluetooth main control module, thus reducing static work power consumption, reduce further cost.
Specifically, embodiment of the present utility model can configure bluetooth module by two aspects.The 13.56MHz module of the non-contact card of the present embodiment can also include a control circuit, it is connected to change-over circuit 32 and bluetooth main control module 34, the electrical power that control circuit monitor in real time change-over circuit receives, according to this monitored results, send notification signal to bluetooth main control module, the transmitting power of maximum communication distance or configuration bluetooth main control module to configure bluetooth main control module.On the other hand, it is also possible in process of production, with regard to the transmitting power of the maximum communication distance of Initialize installation bluetooth module or configuration bluetooth module.
Both configuration modes have different features: in order to as far as possible the electric energy of change-over circuit all be supplied bluetooth communication, preferably after completing bluetooth connection or Bluetooth pairing (will be described later), just the active circuit in 13.56MHz module cut out or enter battery saving mode, such as closing control circuit, and keep coupled antenna and change-over circuit to work on.Like this, control circuit likely cannot send the notification signal receiving power about change-over circuit to bluetooth main control module, therefore, the maximum communication distance just initializing bluetooth main control module in process of production or the transmitting power of configuration bluetooth main control module are generally required.
And if connect or not closing control circuit after Bluetooth pairing completing bluetooth, then notification signal can be sent to bluetooth module by control circuit in real time, its result is, the power supply performance of the NFC read write line according to different mobile terminal, change-over circuit has wider reception power, thus bluetooth main control module can also independently adjust maximum communication distance or the transmitting power of configuration bluetooth main control module according to receiving power, its better adaptability, communication range is likely bigger.
Embodiment of the present utility model can simply arrange based on existing NFC module and existing bluetooth module and realize, it is not necessary to these hardware are significantly revised, the wafer of both modules is designed into same card and configures accordingly.
Embodiment four
As shown in Figure 4, the non-contact card of this utility model embodiment, mainly include coupled antenna 41, change-over circuit 42, data transmit-receive circuit 43, storage circuit 44, control circuit 45 and Bluetooth antenna 46.
Coupled antenna 41 is for receiving the modulation signal of outside and/or unmodulated carrier signal.Typically, modulation signal and the frequency of carrier signal are 13.56MHz, and what coupled antenna 41 received is NFC signal, or coupled antenna 41 receives is RFID signal.
Change-over circuit 42 is connected to coupled antenna 41, for receiving modulation signal and/or carrier signal carries out rectification and voltage stabilizing, exporting DC voltage.
Data transmit-receive circuit 43, storage circuit 44 are all connected with change-over circuit 42 with control circuit 45, use the DC voltage of change-over circuit 42 output as working power.Data transmit-receive circuit 43 is connected respectively to change-over circuit 42 and Bluetooth antenna 46, for the Bluetooth signal received from Bluetooth antenna 46 is demodulated, and to will being modulated by the blue-teeth data that Bluetooth antenna 46 sends, it is thus achieved that Bluetooth signal is sent to Bluetooth antenna 46.Bluetooth antenna 46 is used for receiving and sending Bluetooth signal.
Control circuit 45, is connected with data transmit-receive circuit 43 and storage circuit 44, demodulates the signal obtained according to data transmit-receive circuit 43, reads data or to storing circuit 44 write data from storage circuit 44.
Current near field communication system, mainly there are NFC communication system and RFID (radiofrequencyidentification, radio frequency identification) communication system, therefore outside modulation signal and carrier signal can be from NFC read write line, it is also possible to originate from rfid interrogator.Additionally, coupled antenna can also be 125kHz coupled antenna, its centre frequency is 125kHz, and this is the carrier frequency that another RFID communication system adopts.
Coupled antenna 41 etc. is considered as the main body of non-contact card by the present embodiment, and data transmit-receive circuit 43 and Bluetooth antenna 46 etc. are considered as a communication link.In this utility model, the main functionality of non-contact card is signal to be stored and processes, and in this sense, short-range communication (such as NFC communication) and Bluetooth communication can serve as the communication link of non-contact card of the present utility model.
In other embodiments of the present utility model, non-contact card is communicated by the wireless communication module on coupled antenna and Bluetooth antenna and mobile terminal simultaneously.Now, data transmit-receive circuit 43 is also connected to coupled antenna 41 (as shown in Figure 4), for the modulation signal received from coupled antenna 41 is demodulated, and to being sent by coupled antenna 41 after being modulated by the data that coupled antenna 41 sends, wherein this modulation signal is such as NFC signal (it is of course also possible to being RFID signal).
In the embodiment shown in fig. 4, for the situation that data transmit-receive circuit 43 is not connected with coupled antenna 41, carrying out communication only with bluetooth communications link, data transmit-receive circuit 43 is mainly used to Bluetooth signal is modulated/demodulates.For the situation that data transmit-receive circuit 43 is also connected with coupled antenna 41, data transmit-receive circuit 43 is not only used to Bluetooth signal is modulated/demodulates, and is also used for the signal carrying out communication by coupled antenna 41 is modulated/demodulates.If what coupled antenna 41 received and sent is NFC signal, then data transmit-receive circuit 43 is not only used to Bluetooth signal is modulated/demodulates, and also NFC signal is modulated/demodulates.In a word, when coupled antenna 41 receives and sends non-Bluetooth signal (being different from the modulation signal of Bluetooth signal), data transmit-receive circuit 43 is not only used to Bluetooth signal is modulated/demodulates, and also non-Bluetooth signal (such as NFC signal) is modulated/demodulates.
What receive and send for coupled antenna 41 is NFC signal, when Bluetooth signal and NFC signal are modulated/demodulate simultaneously by data transmit-receive circuit 43, the part that Bluetooth signal is modulated/demodulates and the part that NFC signal is modulated/demodulates, can merge and be set together, it is also possible to be individually separated setting.Those skilled in the art it is also understood that, for other kinds of non-Bluetooth signal, equally possible understand by means of NFC signal;That is, when Bluetooth signal and non-Bluetooth signal are modulated/demodulate by data transmit-receive circuit 43 simultaneously, the part that both signals are modulated/demodulate can merge and is set together, it is also possible to be individually separated setting.
Embodiment five
On the basis of embodiment four, Fig. 5 illustrates the another kind of non-contact card of this utility model embodiment.
As it is shown in figure 5, coupled antenna 41b receive and send be NFC signal, Bluetooth signal is modulated/demodulates be Bluetooth signal process circuit 42b, carried out separately positioned with the NFC signal processing circuit 43b that NFC signal is modulated/demodulates.In this case, what coupled antenna 41b generally received is the NFC signal of 13.56MHz, the part being mainly used to NFC signal is modulated/demodulates is NFC signal processing circuit 43b, and the part being mainly used to that Bluetooth signal is modulated/demodulates is that Bluetooth signal processes circuit 42b.Change-over circuit 44b is simultaneously connected with NFC signal processing circuit 43b and Bluetooth signal processes circuit 42b, and respectively the two is powered.Coupled antenna 41b is also connected with NFC signal processing circuit 43b, is used for receiving and send NFC signal.Bluetooth antenna 45b processes circuit 42b with Bluetooth signal and is connected, and is used for receiving and sending Bluetooth signal.Control circuit 46b is connected with change-over circuit 44b with storage circuit 47b, accesses DC voltage and is operated, and control circuit 46b is also simultaneously connected with NFC signal processing circuit 43b and Bluetooth signal processes circuit 42b.And, when implementing, control circuit 46b and storage circuit 47b can integrate.Embodiment shown in Fig. 5, referring also to the description of embodiment illustrated in fig. 4.
In embodiment shown in Fig. 5, coupled antenna 41b and NFC signal processing circuit 43b constitutes a kind of communication link (NFC communication link) of non-contact card, and Bluetooth antenna 45b and Bluetooth signal process circuit 42b and constitute the another kind of communication link (bluetooth communications link) of non-contact card.It is to say, non-contact card of the present utility model can include two kinds of communication links simultaneously.Accordingly, read write line end on mobile terminals, in order to communicate with non-contact card of the present utility model, also it is equipped with two kinds of communication links, to carry out Bluetooth communication and NFC communication with non-contact card of the present utility model.When by shared to storage circuit and control circuit setting, it is possible to being implemented by same unit (such as control circuit), two kinds of communication links share control circuits.
As in the prior embodiments, the overall power affecting wireless telecommunications has several main factor, including transmitting power, traffic rate and receiving sensitivity, the power consumption of Bluetooth signal process circuit and NFC signal processing circuit therefore can be reduced by reducing the modes such as transmitting power, reduction traffic rate or reduction receiving sensitivity.
Preferably, Bluetooth signal processes circuit and is configured to transmitting power and is not more than-1dBm, for instance be configured to-1dBm to-99dBm.On the other hand, if considered from the angle of receiver, can according to the application scenario of non-contact card, assume a rational effective communication distance, this effective communication distance is defined as setpoint distance, it is only necessary to guarantee the RSSI value receiving sensitivity more than receiver of any point in setpoint distance, and more than the RSSI value of any point of this effective communication distance less than the receiving sensitivity of receiver, in this case, transmitting power is sufficiently small and can ensure that communication will not be interrupted.Preferably, when Bluetooth signal process circuit is configured to emission signal, it is not more than-100dBm with the RSSI value of arbitrary reception point (centered by non-contact card, radius is any point on the sphere of predeterminable range) at the predeterminable range place of non-contact card.
The power of the DC source according to change-over circuit output, the Bluetooth signal of the present embodiment processes circuit needs to adjust the transmitting power of self, for instance, the transient transmission power of Bluetooth signal process circuit is not more than the output of change-over circuit.Such as make again Bluetooth signal process circuit be configured to maximum communication distance carry out signal launch time, instantaneous transmission power consumption is less than the power of (namely less than or equal to) change-over circuit output.Specifically, it is possible to configure Bluetooth signal by two aspects and process circuit.Control circuit can the electrical power that receives of monitor in real time change-over circuit, according to this monitored results, send notification signal and process circuit to Bluetooth signal, process the transmitting power of circuit with the maximum communication distance or configuration Bluetooth signal configuring bluetooth unit.On the other hand, it is possible in process of production, Initialize installation Bluetooth signal is processed to the maximum communication distance of circuit or the transmitting power of configuration Bluetooth signal process circuit.
In the present embodiment, when NFC signal need not be exchanged, and need only to by NFC communication link power taking, then can not enable NFC signal processing circuit.Control circuit is only for reading and writing according to the signal of Bluetooth signal process circuit.And when needs exchange NFC signal, such as, device name and device address (namely pairing) of the bluetooth communication on Bluetooth signal process circuit and mobile terminal is quickly exchanged by NFC communication link, then need to enable NFC signal processing circuit, the modulation signal of coupled antenna is demodulated by NFC signal processing circuit for module, and the NFC communication module that will be sent to by coupled antenna after the modulates information of needs exchange on mobile terminal.
Foregoing embodiments of the present utility model, although obtain limited energy by coupled antenna, but the application scenario of non-contact card of the present utility model is substantially within 0.5 meter, for instance have only to the communication distance of 0-10cm.Therefore, it can, by various modes, reduce the power consumption of non-contact card.
Embodiment six
The another kind of non-contact card of this utility model embodiment, on the basis of previous embodiment four, increases and arranges a power storage module.In the present embodiment as shown in Figure 6, power storage module 63 is connected to change-over circuit 62, includes charge storage element, utilizes the DC voltage that change-over circuit 62 exports that charge storage element is charged.
In the present embodiment, mainly consider when bluetooth communications link works, in a communication cycle, the electric energy that only above portion of time consumption is bigger, and the consumption of remaining time is little.There is a kind of situation, when producing electric current crest, its instantaneous power has exceeded the electrical power that change-over circuit provides.Now, in order to ensure bluetooth communications link energy normal operation, it is possible to before its work, first passing through power storage module 63 and be charged, when waiting charging to reach setting value, the components and parts opened in bluetooth communications link communicate.
Owing to the latter half of a communication cycle consumes less electric energy, so in the cycle of latter half, change-over circuit 62 is except directly supplying electricity to interlock circuit work, moreover it is possible to continue to charge to power storage module 63, thus the transient current crest for next communication cycle is prepared.Such as in a communication cycle 6.25ms set, front 1.25ms is used for receiving and send modulation signal, and transient current is crest value;After 1.25ms, for bluetooth communications link, the modulation signal received carried out inter-process (include but not limited to demodulation, deciphering, calculate, write and reading etc.) and processed stage of rear dormancy.
Power storage module in this utility model embodiment, it is also possible to include electric power storage control unit, aforesaid charge storage element is one or more components and parts that electric capacity or inductance etc. possess savings electric energy, and electric power storage control unit is for controlling the charging and discharging of charge storage element.As previously described, in the part rearward of a communication cycle, bluetooth communications link consumes considerably less electric energy, and now electric power storage control unit just can control charge storage element and charge more fully, and action and moment for highly energy-consuming are prepared.
Above-mentioned be describe to the parallel way of other module for power supply of non-contact card with change-over circuit 62 and power storage module 63 simultaneously, certainly, change-over circuit 62 and power storage module 63 can also be the relations of series system, namely, the DC voltage of change-over circuit 62 output is provided only to power storage module 63, then by power storage module 63 to other module for power supply of non-contact card.
In embodiment shown in Fig. 6, coupled antenna 61, change-over circuit 62, storage circuit 64, control circuit 65, data transmit-receive circuit 66, Bluetooth antenna 67 etc. please compare corresponding circuits in embodiment illustrated in fig. 4 and be attached, and repeat no more herein.
Increase after being provided with power storage module, it is not necessary to the instantaneous power limiting bluetooth communications link is not more than the output of change-over circuit.In this case, as long as storage circuit, data transmit-receive circuit and control circuit cumulative power consumption in single communication cycle are not more than the accumulative output of change-over circuit, also can guarantee that the normal operation of non-contact card.Under such circumstances, data transmit-receive circuit can instantaneous power can more than the output of change-over circuit, thus improve the stability of non-contact card.
Embodiment seven
Previous embodiment six increases power storage module on embodiment four basis, in like manner, can also increase power storage module on the basis of embodiment five equally.As it is shown in fig. 7, the another kind of non-contact card of this utility model embodiment, on the basis of previous embodiment five, increase and a power storage module 78 is set.Power storage module 78 is connected to change-over circuit 74, includes charge storage element, utilizes the DC voltage that change-over circuit 74 exports that charge storage element is charged.Power storage module 78 is connected respectively to change-over circuit 74, control circuit 76, NFC signal processing circuit 73 and Bluetooth signal and processes circuit 72 (not shown corresponding annexation), power for only processing circuit 72 to Bluetooth signal or power to control circuit 76, NFC signal processing circuit 73 and Bluetooth signal process circuit 72 respectively, while obtaining electric energy at Bluetooth signal process circuit 72 from change-over circuit 74, process circuit 72 to Bluetooth signal and carry out supplementary power;Or while control circuit 76, NFC signal processing circuit 73 and Bluetooth signal process circuit 72 etc. obtains electric energy from change-over circuit 74, process circuit 72 to control circuit 76, NFC signal processing circuit 73 and Bluetooth signal and carry out supplementary power.Coupled antenna 71 in the present embodiment, Bluetooth signal process circuit 72, NFC signal processing circuit 73, change-over circuit 74, Bluetooth antenna 75, control circuit 76 and storage circuit 77 etc., also incorporated by reference to previous embodiment five, embodiment four and embodiment six, repeat no more herein.And, it should be noted that, the present embodiment is based on the basis of aforementioned embodiment illustrated in fig. 5 five, uses for reference previous embodiment six and draws based on the improvement of embodiment four, and therefore the content of previous embodiment five, embodiment four and embodiment six each contributes to understand embodiment illustrated in fig. 7.
In like manner, as described in embodiment six, in other embodiments of the present utility model, it is also possible to be that the DC voltage of change-over circuit 74 output is provided only to power storage module 78, then by power storage module 78 to other module for power supply of non-contact card.
Embodiment eight
The method of attachment when communicating with mobile terminal of the non-contact card of this utility model embodiment, as shown in Figure 8, this method of attachment generally comprises the steps:
Step S810, non-contact card is pressed close to mobile terminal by user.
Step S820, when mobile terminal opens read write line, non-contact card enters efficient communication scope, then can receive modulation signal or the carrier signal of 13.56MHz, alternating voltage is changed by change-over circuit, and to supply other circuit, the NFC module of non-contact card is started working.
Step S830, NFC module assists bluetooth communication to complete the Bluetooth pairing between mobile terminal and non-contact card.Utilize NFC module to carry out the quick pairing of bluetooth communication, then set up bluetooth communication mode, it is well known to those skilled in the art, for instance pairing disclosed in Chinese Patent Application No. CN201210007084.2, CN201010019422.5 and CN200480015810.9 and connection establishment method.This is no longer described by the application.
Although utilizing NFC module to have the advantage that assisting bluetooth communication to complete pairing, but this utility model does not limit the function that the pairing assisting bluetooth communication is NFC module of the present utility model indispensability, it is also feasible for utilizing existing Bluetooth pairing mode (such as searching for bluetooth communication on the mobile apparatus, then carry out choosing and matching) to carry out matching.NFC module of the present utility model is mainly used in powering to bluetooth communication, or is mainly used in low-speed communication (for bluetooth communication).
Should be noted that time, bluetooth communication can be operated under host mode, slave mode and broadcast mode.When bluetooth communication works in a broadcast mode, non-contact card of the present utility model is without matching with the blue-tooth device on read write line, blue-tooth device within the scope of non-contact card efficient communication, the Bluetooth communication signals that non-contact card externally sends can be received, thus sending the data of memory element to read write line.
Step S840, keeps non-contact card in the efficient communication scope of the read write line of mobile terminal, utilizes bluetooth communication and mobile terminal to communicate transmission.
It can be appreciated that the NFC module in embodiment illustrated in fig. 8 could alternatively be the 13.56MHz module in this utility model previous embodiment.For replacing with the embodiment of NFC module with 13.56MHz module, referring also to the technology contents of the embodiment eight shown in Fig. 8, and the non-contact card described in embodiment one to embodiment seven.
The non-contact card provided due to this utility model embodiment have employed NFC module and bluetooth communication simultaneously, utilizes NFC module to be powered to the bluetooth communication carried out after improving.This bluetooth communication improved compares that existing bluetooth communication effective communication distance is short, it is low in energy consumption, the power that theres is provided less than or equal to NFC module of instantaneous power that preferably this bluetooth communication consumes, even if therefore non-contact card is not provided with battery and also is able to maintenance normal operation.Further, since the transmission speed of bluetooth module is faster than NFC module gets well a few to tens of times, therefore, assembled scheme of the present utility model solves conflicting problem between power supply and transmission speed.
Although above-described embodiment being not provided with independently-powered battery in non-contact card illustrate, in practice, it is also possible to arrange independently-powered battery at non-contact card, to meet the needs of some occasion.It will be understood by those skilled in the art that after independently-powered battery is set, nor affect on the realization of above-described embodiment.Additionally, it is appreciated that, memory element can also be set in bluetooth main control module, by the above-mentioned multimedia information storage stored in storage circuit in the memory element of bluetooth main control module, then after completing Bluetooth pairing, communication between non-contact card and mobile terminal can realize on bluetooth main control module, such that it is able to NFC module or NFC signal processing circuit are closed or enter battery saving mode, now change-over circuit remains to normally receive carrier signal or modulation signal to power to other circuit and bluetooth main control module, do not affect the work of bluetooth main control module.
Embodiment nine
The non-contact card of this utility model embodiment includes NFC module and bluetooth communication, and this card is when carrying out communication, as it is shown in figure 9, mainly comprise the steps.
Step S910, NFC module receive outside modulation signal and/or carrier signal.
Step S920, received modulation signal and/or carrier signal are carried out rectification and voltage stabilizing by NFC module, export DC voltage.
Step S930, bluetooth communication accesses this DC voltage as working power, utilizes this DC voltage and outside to carry out Bluetooth communication, reads or writes including utilizing this DC voltage to carry out the data relevant to Bluetooth communication.
Bluetooth communication is when carrying out Bluetooth communication with outside, power consumption is reduced, it is ensured that the DC voltage exported according to outside modulation signal and/or carrier signal can support the normal operation of card by reducing transmitting power, reduce traffic rate or reducing receiving sensitivity.
The non-contact card of this utility model embodiment is when carrying out communication, and the instantaneous power of bluetooth communication is not more than the power of NFC module output DC voltage.
Owing to non-contact card can be configured to read-only or readable writeable according to purposes, therefore, the Bluetooth communication of non-contact card can be only reading data operation, and does not comprise data writing operation;Or comprise reading data manipulation and data writing operation.
Embodiment ten
The non-contact card of this utility model embodiment includes NFC module and bluetooth communication, this card when operation, the power supply of its internal circuit, as shown in Figure 10, mainly include following steps.
Step SA1, NFC module receive outside modulation signal and/or unmodulated carrier signal.
Step SA2, received modulation signal and/or carrier signal are carried out rectification and voltage stabilizing by NFC module, it is thus achieved that DC voltage.
Step SA3, bluetooth communication accesses this DC voltage as working power.In use, bluetooth communication utilizes this DC voltage to be that the Bluetooth communication carried out with outside is powered, and to utilize this DC voltage be that the data carried out corresponding to this Bluetooth communication read or write and are powered.
In embodiment of the present utility model, bluetooth communication can only use DC voltage as working power.In further embodiments, it is also possible to utilize the DC voltage that NFC module exports that the built-in power storage module of non-contact card is charged, and utilize power storage module independently or be powered for bluetooth communication together with NFC module.
When bluetooth communication and outside carry out Bluetooth communication, reduce transmitting power, reduce traffic rate or reduce receiving sensitivity to reduce power consumption, it is ensured that modulate signal and/or DC voltage that carrier signal exports can support the normal operation of card according to outside.
Non-contact card of the present utility model is when operation, and the instantaneous power of bluetooth communication is not more than the power of described NFC module output DC voltage.
Owing to non-contact card can be configured to read-only or readable writeable according to purposes, therefore, the Bluetooth communication of non-contact card can be only reading data operation, and does not comprise data writing operation;Or comprise reading data manipulation and data writing operation.
Utilize this DC voltage for outside carry out Bluetooth communication be powered time, by reduce transmitting power, reduce traffic rate or reduce receiving sensitivity, reduce the power consumption carrying out Bluetooth communication.The electrical power of this DC voltage of monitor in real time, and maximum communication distance or the transmitting power of Bluetooth communication is configured according to monitored results.
Non-contact card of the present utility model, also utilizes this DC voltage that built-in power storage module is charged, and recycle this power storage module independently or is be powered with outside communication together with this DC voltage.
The power supply process of the non-contact card described by the communication process of the non-contact card described by embodiment nine and embodiment ten, referring also to description to non-contact card in previous embodiment three.Certainly, the content described by previous embodiment one, embodiment two and embodiment four to embodiment eight also can help to understand the non-contact card described by embodiment nine and embodiment ten, please also refer to.
Other variation
1, embodiment six and embodiment seven respectively illustrate the embodiment arranging power storage module on non-contact card, according to another aspect of the present utility model, can also this power storage module be arranged in aforesaid embodiment one to three, for balancing the power consumption condition under non-contact card different operating state, improve the stability of non-contact card.And, increase after being provided with power storage module, just there is no need the instantaneous power of restriction bluetooth main control module and be not more than the output of change-over circuit, as long as the cumulative power consumption that bluetooth main control module is in single communication cycle is not more than the accumulative output of change-over circuit, non-contact card normal operation also can be allowed.Under such circumstances, the instantaneous power of bluetooth main control module can more than the output of change-over circuit, thus improve the stability of non-contact card.
2, in above-described embodiment, in bluetooth main control module or control circuit, it is possible to comprise CPU or MCU, it is also possible to do not comprise, but by completing the hardware circuit of specific function to replace the function of CPU or MCU.When comprising CPU or MCU, the function of non-contact card can be modified by the mode of firmware or software and adjust, and has bigger motility;And when adopting the hardware circuit of customization to realize, response speed faster, circuit more power saving.
Although the embodiment disclosed by this utility model is as above, but described content is only the embodiment readily appreciating technical solutions of the utility model and adopt, and is not limited to this utility model.Technical staff in any this utility model art; under the premise without departing from the spirit and scope disclosed by this utility model; any amendment and change can be carried out in the form implemented and details; but scope of patent protection of the present utility model, still must be as the criterion with the scope that appending claims defines.

Claims (9)

1. a non-contact card, including NFC module and bluetooth communication, it is characterised in that this card includes:
Described NFC module is for receiving modulation signal and/or the carrier signal of outside, and exports DC voltage according to described modulation signal and/or carrier signal;
Described bluetooth communication accesses described DC voltage as working power, for carrying out Bluetooth communication with outside.
2. non-contact card according to claim 1, it is characterised in that
Described bluetooth communication only uses described DC voltage as working power.
3. non-contact card according to claim 1, it is characterised in that this non-contact card includes:
Power storage module, for utilizing the DC voltage that described NFC module exports to be charged, independently or be powered for described bluetooth communication together with described NFC module.
4. non-contact card according to claim 1, it is characterised in that
The instantaneous power of described bluetooth communication is not more than the power of described NFC module output DC voltage.
5. non-contact card according to claim 1, it is characterised in that described NFC module includes:
Coupled antenna, for receiving modulation signal and/or the carrier signal of outside;
Change-over circuit, modulation signal and/or carrier signal for described coupled antenna is received carry out rectification and voltage stabilizing, export described DC voltage.
6. non-contact card according to any one of claim 1 to 3, it is characterised in that described bluetooth communication includes:
Bluetooth antenna, is used for the Bluetooth signal outside external emission Bluetooth signal or reception;
Bluetooth main control module, is used for accessing described DC voltage as working power, is demodulated for modulating the generation described Bluetooth signal to external emission and/or the described Bluetooth signal to external reception.
7. non-contact card according to claim 6, it is characterised in that:
Described bluetooth main control module is configured to reduce transmitting power, reduces traffic rate or reduces receiving sensitivity to reduce power consumption.
8. non-contact card according to claim 6, it is characterised in that:
Described bluetooth main control module farther includes internal storage, for storing data for described Bluetooth communication;The capacity of described internal storage is more than 200 kilobytes.
9. non-contact card according to claim 6, it is characterised in that described non-contact card includes:
External memory storage;
Described bluetooth main control module farther includes internal storage;
Described external memory storage and described internal storage are used for storing the total capacity of data, described external memory storage and described internal storage more than 200 kilobytes for described Bluetooth communication.
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