CN105354524B - Near-field communication (NFC) and proximity sensor for portable device - Google Patents
Near-field communication (NFC) and proximity sensor for portable device Download PDFInfo
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- CN105354524B CN105354524B CN201510729307.XA CN201510729307A CN105354524B CN 105354524 B CN105354524 B CN 105354524B CN 201510729307 A CN201510729307 A CN 201510729307A CN 105354524 B CN105354524 B CN 105354524B
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- 125000003367 polycyclic group Chemical group 0.000 claims description 4
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- 239000003990 capacitor Substances 0.000 description 11
- 238000012545 processing Methods 0.000 description 9
- 238000003860 storage Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 3
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- 230000008859 change Effects 0.000 description 2
- 238000005314 correlation function Methods 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10237—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the reader and the record carrier being capable of selectively switching between reader and record carrier appearance, e.g. in near field communication [NFC] devices where the NFC device may function as an RFID reader or as an RFID tag
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/72—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for local intradevice communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/73—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for taking measurements, e.g. using sensing coils
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Abstract
There has been described technologies related with near-field coupling and neighborhood sensing operation.For example, proximity sensor uses the loop aerial for near-field communication (NFC) function.Proximity sensor can be integrated into NFC module to form individual module.
Description
The application be PCT international application no be PCT/US2012/029301, international filing date be on March 15th, 2012, in
State's national application number is 201280071356.3, entitled " near-field communication (NFC) and proximity sensor for portable device "
Application divisional application.
Background
Had already appeared permission wireless portable device (especially slim type portable electronic equipment) closer to each other it
Between near-field coupling (such as wireless power transfer (WPT) and near-field communication (NFC)).Near-field coupling function uses in each equipment
Radio frequency (RF) antenna send and receive electromagnetic signal.Due to user demand and/or for aesthetics, these are portable
Many in formula wireless device is small-sized, and becomes smaller with market development, and is tended to when watching from side viewing
With the ratio of width to height exaggerated.As a result, many slim portable devices are combined with plate aerial, plate aerial uses conductive material
Coil as its radiating antenna be used for near-field coupling function.
At the same time, (capacitive character) proximity sensor can be used for having built-in wireless wide area network (WWAN) (such as third generation
Or forth generation (3G/4G) digital radio) tablet computer to transmit Federal Communication as such as specific absorption rate (SAR)
The committee (FCC) regulation.For example, proximity sensor can detecte the human body in neighborhood, and can be used with relatively large ruler
Very little sensor electrode come realize neighborhood detect.Since NFC and proximity sensor equipment can all require showing in portable device
Space is write, and any one will not all be covered by metal chassis/mask.In other words, NFC and proximity sensor equipment can be for nothings
The very limited space of antenna in line equipment (such as tablet computer) and compete.As portable device becomes thinner and adopts
All-metal chassis is taken, the confined space will become more challenging.For this purpose, when NFC and/or proximity sensor are thin in order to adapt to
When so that their corresponding sizes is become more compact in type portable device, their performance will receive damage.Therefore, it is possible to
Solution is realized to provide efficiency related with the performance of proximity sensor and NFC device in slim type portable equipment.
Brief description
Figure 1A shows the layout of the example near-field coupling between portable device to execute near-field communication (NFC) correlation function.
Figure 1B shows the exemplary radio communications layout including neighborhood sensing operation between portable device.
Fig. 2 is the schematic diagram of example portable device.
Fig. 3 is example proximity sensor circuit and the signal of near-field communication (NFC) module association for including passive device
Figure.
Fig. 4 is example proximity sensor circuit and the signal of near-field communication (NFC) module association for including active device
Figure.
Fig. 5 is the method for carrying out neighborhood sensing and near-field communication using same loop aerial.
Following specific embodiments are provided referring to attached drawing.In the accompanying drawings, the leftmost digit of appended drawing reference usually identifies attached drawing
Mark the figure number first appeared.Make that similar or identical project is presented with like reference characters in different figures.
Detailed description
The document discloses one or more systems, device, method etc., for the antenna of Coupling device, more specifically
The neighborhood sensing and near-field coupling ability of portable device are realized for using the same loop aerial of slim type portable equipment.
Near-field coupling includes the wireless power transfer (WPT) and/or near-field communication (NFC) of (illustrate rather than limit purpose) portable device
Ability.In one implementation, proximity sensor and NFC module are integrated to form individual module.Individual module can connect to annular
Antenna, loop aerial receive the electric signal for both neighborhood sensing operation and NFC operation.Neighborhood sensing operation can be configured
The metal of another equipment in the people in neighborhood, or detection contiguous range is detected at operating with low frequency electrical signal (such as 30KHz)
Component.NFC operation may be configured to operate with high frequency electrical signal (such as 13.56MHz) to execute NFC function.It is realized one
In, loop aerial is configured to include beginning (open ended) spiral shell used during neighborhood sensing operation by proximity sensor
Revolve loop aerial.On the other hand, during NFC operation, loop aerial is configured to include closed end (closed ended) spiral
Shape antenna is to execute NFC function by NFC module.
In one implementation, passive device or component (for example, resistance capacitance low-pass filter) can be installed by neighborhood sense
Operation is surveyed to separate with NFC operation.In this implementation, neighborhood sensing electric signals and NFC electric signal isolation.In other implementations,
Software realization is separated neighborhood sensing electric signals and NFC electric signal using active device (such as switch).
Example system
Figure 1A shows the example layout for executing the portable device of NFC function.More specifically, user may want to spy
Surely meet the convenient manner of ergonomics to operate the portable electronic device and/or other equipment of near-field coupling enabling.It is this
The example of portable device includes but is not limited to mobile phone, cellular phone, smart phone, personal digital assistant, plate electricity
Brain, net book, laptop, laptop computer, multimedia playback device, digital music player, digital video play
Device, navigation equipment, digital camera etc..
In one implementation, Figure 1A shows so-called " NFC collides (bump) ", and two of them user's (not shown) is with edge-to-edge
(edge-to-edge) or head to head the mode of (head-to-head) by their NFC portable device 102-2 enabled and
102-4 " collision " together, to execute the relevant information sharing function of NFC.Figure 1A shows the portable device for NFC purpose
102 it is generally desirable to side-by-side layout.Portable device 102-2 and 102-4 may include polycyclic road (spiral) loop aerial
(not shown) is to execute NFC operation.NFC operation may include the data communication between portable device 102.For example, portable
Equipment 102-2 can be operated by near-field coupling and be passed information to portable device 102-4.
Figure 1B shows the wireless communication between portable device 102-2 and portable device 102-4.In one implementation, just
Portable device 102-2 and 102-4 may include proximity sensor circuit (not shown), and proximity sensor circuit uses polycyclic road ring
Shape antenna detects to execute neighborhood sensing.Neighborhood sensing detection can be used for meeting FCC (and other) regulation, such as SAR.SAR can
To be related to being exposed to regulation limitation related from electromagnetic energies of wireless devices such as portable devices 102 with people.
In one implementation, portable device 102-2 and 102-4 may include containing one or more transceiver antennas (not
Show) radio communication circuit (not shown).Radio communication circuit may be configured to according to one or more wireless standards and
Operation.For example, radio communication circuit may be configured to via the channel radio established according to 3G or 4G digital wireless communication standard
Believe link 104 (passing through tower 106), wirelessly transmits information between portable device 102-2 and portable device 102-4.This
3G or 4G digital wireless communication standard may include WiMax communication standard (such as according to 802.16 family of standards of IEEE, such as
IEEE 802.16-2009), 3rd Generation Partnership Program (3GPP) long term evolution (LTE) communication standard or other one or more marks
One or more of quasi- or agreement.In one embodiment, radio communication circuit may be configured to according to Wi-Fi wireless local area
Net (WLAN) standard or one or more other standards or agreement carry out radio transmitting information, Wi-Fi WLAN
(WLAN) standard such as 802.11 family of standards of IEEE is (for example, IEEE 802.11a-1999,802.11b-1999,802.11g-
One or more of 2003,802.11n-2009,802.11-2007).
In order to meet SAR requirement, neighborhood sensing detects the one or more transceiver days allowed at portable device 102
At when line (not shown) only detects people (such as people 108) in portable device 102 (such as portable device 102-2) neighborhood
In reception pattern.In another case, if neighborhood sensing detection does not detect people 106, one or more transceivers day
Line can regularly be operated with emission mode and reception pattern.Moreover, transceiver antenna may be configured in transceiver antenna
Neighborhood in detect people 108 in the case where inhibit transmission power.In other implementations, proximity sensor circuit can be used more
Loop loop aerial come detect possibly into portable device 102-2 neighborhood in another portable device metal assembly
(not shown).The information can also be used in wireless communication/wireless power transfer between two equipment of starting/stopping.
Example portable device
Fig. 2 is the example that the portable device 102 of NFC operation and neighborhood sensing detection is carried out using same loop aerial
Embodiment.In one implementation, wireless device 102 may include transceiver (TX/RX) antenna 200, receiver (RX) antenna 202,
NFC or proximity sensor loop aerial (NFC/ sensor loop aerial) 204, proximity sensor circuit and NFC module association
206 and radio communication circuit 208.
In one implementation, TX/RX antenna 200 and NFC/ sensor loop aerial 204 can be located at portable device 102
(such as top margin 210) on one side.Similarly, RX antenna 202 can be located at the another side (such as bottom edge 212) of portable device 102.
In one implementation, NFC/ sensor loop aerial 204 may be configured to include beginning spiral loop to execute neighborhood sense
Survey detection.For example, existing still not for detecting tissue in the neighborhood at 204 present position of NFC/ sensor loop aerial
In the presence of.At the same time, during NFC operation, NFC/ sensor loop aerial 204 may be configured to include closed end helical annular
Antenna such as reads NFC label, credit card or using two NFC equipment room enabled to execute the relevant function of NFC
" NFC collision " carries out information transmitting.
In one implementation, NFC/ sensor loop aerial 204 can carry, send or receive electric signal, the electric signal packet
It includes neighborhood and senses electric (not shown) signal and NFC electric signal (not shown).Neighborhood sensing electric signals may include adjacent due to entering
People (such as people 106) in domain or due in the contiguous range of NFC/ sensor loop aerial 204 another equipment (such as
Portable device 102-2,102-4) metal assembly and caused by capacitive character feature variation.In one implementation, neighborhood senses
Electric signal may include low operating frequency (such as 30KHz), and neighborhood sensing electric signals can be separated with NFC electric signal, NFC electricity
Signal includes high operating frequency (such as 13.56MHz) to execute NFC correlation function.
In one implementation, proximity sensor circuit and NFC module association 206 may be configured to processing from NFC/ biography
The electric signal of sensor loop aerial 204 received.Proximity sensor circuit and NFC module association 206 be include neighborhood pass
The individual module of sensor (not shown) and NFC module (not shown).Proximity sensor processing neighborhood sensing electric signals, and NFC mould
Block handles NFC electric signal.Proximity sensor circuit and NFC module association 206 are coupled to radio communication circuit 208.?
In one realization, radio communication circuit 208 may be configured to the information in response to obtaining from neighborhood sensing operation to adjust communication
Parameter, such as transmission power.The adjustment that 200 operation mode of TX/RX antenna may be implemented is wanted with the SAR for meeting FCC (and other)
It asks.
In a further implementation, proximity sensor circuit and NFC module association 206 may be configured to processing from NFC/
Sensor loop aerial 204 and another NFC/ sensor loop aerial that can be located at the side 212 of portable device 102 are (not
Show) the electric signal received.Proximity sensor circuit discussed above and NFC module association 206 is applied similarly
Operation；However, the NFC/ sensor annular at side 212 can be considered when adjusting messaging parameter for radio communication circuit 208
Neighborhood at antenna (not shown) senses detection.For example, if in NFC/ sensor loop aerial 204 and at side 212
People is detected in the neighborhood of another NFC/ sensor loop aerial, then inhibits transmission power in portable device 102.
In a further implementation, portable device 102 may include the proximity sensor that can be integrated with NFC module (not shown)
Component (not shown) and NFC/ sensor loop aerial 204 are to form individual module.Proximity sense device assembly can be used for passing through
The introduced capacitive character of the metal assembly in other portable devices, NFC label or credit card is detected to change, it is portable to detect
In the neighborhood sensing range of equipment 102 with the presence or absence of other near field coupling devices (for example, portable device 102-2,102-4) or
NFC label/credit card.During the detection operation of proximity sensor, NFC is being executed by NFC/ sensor loop aerial 204
And/or when WPT operation, NFC/WPT module can be activated or disabled.NFC and/or WPT operation activation/disabling can to avoid
The neighborhood of portable device 102 is in without other near-field coupling portable devices (such as portable device 102-2,102-4)
The continuous RF transmitting of NFC module when in range, to reduce power consumption and RF transmitting.
Moreover, portable device 102 includes one or more processors.Processor 214 can make single processing unit or
Multiple processing units, all processing units may include single or multiple processing units or multiple kernels.Processor 214 can be by
It is embodied as one or more microprocessors, microcomputer, microcontroller, digital signal processor, central processing unit, state
Machine, logic circuit and/or based on operational order come any equipment of manipulation signal.Other than other abilities, processor 214 can
To be configured to fetch and execute the receiver readable instruction or processing in memory 216 or other computer readable storage mediums
Device can access instruction.
In specific realize, memory assembly 216 is the example of computer readable storage medium for storing instruction,
Instruction is executed by processor 214 to execute above-mentioned various functions.For example, memory 216 generally may include volatile memory
With nonvolatile memory (for example, RAM, ROM etc.) the two.Memory 216 can be referred to herein as memory or computer
Readable storage medium storing program for executing.Memory 216 can store computer-readable, processor executable program instructions as computer program generation
Code, computer program code can as processor 214 execute as be configured to realize herein realization described in operation and function
The specific machine of energy.
Example portable device 102 described here is only the example suitable for certain realizations, and is not intended to can
Realize that the environment of process described here, component and feature, the purposes of structure and frame or function make any restrictions.
In general, any function referring to described in attached drawing can be used software, hardware (such as fixed logic circuit) or
These combinations realized are realized.Program code can be stored in one or more computer readable memory devices or other
In computer readable storage devices.Therefore, process described here and component can be realized by computer program product.Institute as above
State, computer storage medium include information for storage any method or technique realize volatile and non-volatile, can
Mobile and irremovable medium, information such as computer readable instructions, data structure, program module or other data.Computer
Storage medium includes but is not limited to: RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digitized video light
Disk (DVD) or other optical storages, magnetic cassettes, tape, disk storage or other magnetic storage devices can be used for storing
By any other medium of the information of calculating equipment access.
Example proximity sensor and NFC module with passive device
Fig. 3 is the example implementation 300 of the proximity sensor with passive device and NFC module.It is relevant to near-field coupling
Emerging technology enables the user of portable device 102, and there are many attracting experience.For example, by flexible print circuit
(FPC) --- flexible print circuit (FPC) combines NFC/ sensor loop aerial 204 --- is integrated into slim type portable equipment
In 102 any increment of the thickness of portable device 102 can minimize.
With continued reference to Fig. 3, this, which is illustrated, is integrated into individual module (that is, proximity sensor circuit and NFC module association
206) proximity sensor 302 and NFC module 304 in.In one implementation, proximity sensor 302 may be configured to using
NFC/ sensor loop aerial 204 carries neighborhood sensing electric signals.Although NFC/ sensor loop aerial 204 can be by NFC mould
Block makes to be configured for the relevant function of NFC simultaneously, can be by installing passive device for neighborhood sensing electric signals and NFC telecommunications
It number separates.
In one implementation, proximity sensor 302 may be configured to carry out with the low frequency electrical signal of such as 30KHz electric signal
Operation is to be used for neighborhood sensing operation.In this embodiment, it is surveyed by assessing the charging and discharging electric current by injection loop aerial 204
Measure capacitive character feature.When people enters the neighborhood of NFC/ sensor loop aerial 204, capacitive character feature can change.Capacitor
Property feature variation can with triggering TX/RX antenna 200 selection configured capacitance variations threshold value compared with, or reduce nothing
The TX power of line telecommunication circuit 208.The threshold value can be applied similarly to due in 204 neighborhood of NFC/ sensor loop aerial
The metal assembly of another portable device and caused by capacitive character feature variation.
In one implementation, NFC/ sensor loop aerial 204 may be configured to include opening during neighborhood sensing operation
Hold shape.For example, the terminal links 306-2 being connected with one end of NFC/ sensor loop aerial 204 can be connected to neighborhood
Sensor 302, and it is connected to the terminal of the front end of NFC module 304.With the other end phase of NFC/ sensor loop aerial 204
Second terminal link 306-4 even can be connected to the another terminal of NFC module 304.In one implementation, NFC module 304
Front end terminal is connected to capacitor 308, and NFC module 304 is linked to the end of NFC/ sensor loop aerial 204 by capacitor 308
End connection 306.During neighborhood sensing operation, capacitor 308 (such as 470pF) can serve as to low frequency electrical signal (such as
Open circuit (that is, high degree of isolation) 30KHz).In other words, the front end of terminal connection 306-2 and 306-4 and NFC module 304 disconnects.
On the other hand, the low-pass filter including passive component resistor device 310 can serve as the short circuit to 30KHz neighborhood sensing electric signals
(that is, low decaying).Thus, for neighborhood sensing operation, NFC/ sensor loop aerial 204 carrys out low frequency neighborhood sensing signal
It says and is rendered as beginning spiral shape NFC/ sensor loop aerial 204.
During NFC operation, capacitor 308 may include in relatively high working frequency (for example, operating for NFC
13.56MHz) the short circuit of place's equivalence.On the other hand, NFC/ sensor loop aerial 204 is linked into the low of proximity sensor 302
Bandpass filter can be provided in open circuit of equal value under the NFC operating frequency of 13.56MHz.It in other words, will be adjacent during NFC operation
The low-pass filter that zone sensors 302 link to NFC/ sensor loop aerial 204 can isolate high frequency NFC electric signal.Thus,
NFC is operated, NFC/ sensor loop aerial 204 is rendered as closed helical shape NFC/ sensing for high frequency NFC signal
Device loop aerial 204.
Example proximity sensor and NFC module with active device
Fig. 4 is the example implementation 400 of the proximity sensor with active device and NFC module.In one implementation, active device
Part may be configured to include switch 402-2 and 402-4, be sensed with so that the front end terminal of NFC module 304 is linked to NFC/
Device loop aerial 204.Moreover, switch 402-6 can be used for linking to proximity sensor 302 into NFC/ sensor loop aerial 204
Terminal links 306-2.For example, switch 402-2 and 402-4 may be configured to include open circuit during neighborhood sensing operation,
And switch 402-6 may be configured to include short circuit.As a result, NFC/ sensor loop aerial 204 is configured in proximity sense
It include beginning spiral shape during the neighborhood sensing operation of device 302.In another example, NFC operation during, switch 402-2 with
402-4 may be configured to include short circuit, and switch 402-6 may be configured to include open circuit.As a result, NFC/ sensor annular
Antenna 204 is configured to during the NFC operation of NFC module 304 include closed end spiral shape.
In one implementation, switch 402 can be controlled dynamically based on the use at portable device 102.For example, if
TX/RX antenna 200 is not used (for example, transmitting for 3G), then NFC/ sensor loop aerial 204 can specially be mainly used for
The relevant function of NFC.Compared with the use (that is, capacitor 308 and resistor 310) of passive device, passive device is (that is, switch
402) it may be configured to execute neighborhood sensing detection in particular moment in the time domain and execute the relevant function of NFC at another moment
It is toggled between energy.
Example process
Fig. 5 shows an example flow diagram, which illustrates using same loop aerial and carry out neighborhood sensing and near field
The exemplary method of communication.The order that this method is described is not intended to be construed as limiting, and any amount of the method box can be with
It is combined to realize this method or alternative in any order.Furthermore, it is possible to delete individual boxes from this method without carrying on the back
Spirit and scope from theme described here.Moreover, this method can be with any hardware appropriate, software, firmware or combinations thereof
It realizes, without departing from the scope of the present invention.For example, computer accessible can be come in fact by using same loop aerial
Existing neighborhood sensing operation and NFC operation.
In box 502, execution carries by loop aerial, emits or receives electric signal.In one implementation, loop aerial
(for example, NFC/ sensor loop aerial 204) can receive, carry or emit electric signal, and electric signal includes neighborhood sensing telecommunications
Number and NFC electric signal.For example, neighborhood sensing electric signals may include low operating frequency (for example, 30KHz) to realize that neighborhood senses
Operation.On the other hand, NFC electric signal may include high operating frequency (for example, 13.56MHz) to realize the relevant function of NFC.
In box 504, neighborhood sensing electric signals and NFC electric signal are separated.Since NFC electric signal includes and neighborhood sense
Survey electric signal (that is, 30KHz) different operating frequency (that is, 13.56MHz), therefore passive device (for example, capacitor 308)
It can be used for separating neighborhood sensing electric signals and NFC electric signal.For example, passive device is (that is, capacitor 308 and resistor
310) use may include between proximity sensor (such as proximity sensor 302) and NFC/ sensor loop aerial 204
Low-pass filter prevents NFC electric signal to allow neighborhood sensing electric signals being transferred to proximity sensor 302 simultaneously.Another
In an example, the use of passive device (that is, capacitor 308 and resistor 310) may include NFC module (such as NFC module 304)
High-pass filter between NFC/ sensor loop aerial 204, it is same to allow NFC electric signal being transferred to NFC module 304
When prevent neighborhood sensing electric signals.
In one implementation, the use of passive device or component (that is, capacitor 308 and resistor 310) can configure NFC/
Sensor loop aerial 204 so as to during neighborhood sensing operation include beginning spiral shape annular antenna configuration.On the other hand, nothing
Source device can configure NFC/ sensor loop aerial 204 to include that closed loop spiral shape loop aerial is matched during NFC is operated
It sets.
In other implementations, the use of active switch (for example, active switch 402) may be configured to (for example, by software
Application configuration) neighborhood sensing electric signals and NFC electric signal are separated.For example, switch 402 can during neighborhood sensing operation
To allow the connection between proximity sensor 302 and NFC/ sensor loop aerial 204, and NFC module 304 and NFC/ are passed simultaneously
Sensor loop aerial 204 disconnects.In this embodiment, NFC/ sensor loop aerial 204 is configured to during neighborhood sensing operation
Including beginning spiral shape annular antenna configuration.Similarly, active switch 402 may be configured to proximity sense in switch 402
Device 302 and NFC/ sensor loop aerial 204 disconnect and when NFC module is connected to NFC/ sensor loop aerial 204 simultaneously, will
NFC/ sensor loop aerial 204 is transformed into closed end spiral shape annular antenna configuration.
In box 506, the relevant function of NFC is executed using NFC electric signal.
In box 508, it is determined whether meet the threshold value capacitor of neighborhood sensing operation.In one implementation, proximity sensor 302
Handle as NFC/ sensor loop aerial 204 neighborhood in people and caused by capacitance variations.Threshold value capacitance can be matched
It is set to the selection of triggering transceiver antenna (for example, TX/RX antenna 200) or passes through TX antenna by adjusting radio communication circuit
The transmission power of (for example, TX/RX antenna 200) is to meet SAR requirement.If meeting threshold value capacitance, along box 510
"Yes" branch executes the adjustment of transceiver antenna operation.
Otherwise in box 502, along the "No" branch of box 508, NFC/ sensor loop aerial 204 continues to telecommunications
Number.
In box 510, the adjustment of transceiver antenna operation is executed.In one implementation, transceiver antenna is (for example, TX/RX
200) may be configured to simultaneously with transmitting and reception pattern operated, perhaps only operated in a receiving mode or with
Repressed transmission power state operation is to meet SAR requirement.
Various implementations according to the invention have been described in the context of specific embodiments.These embodiments are
It is illustrative and not restrictive.Many variations, modification, addition and improvement are possible.Therefore, it is possible to be group described here
Part provides multiple examples as single instance.Boundary between various assemblies, operation and data storage is arbitrary sometimes, is being had
It illustrates specifically to operate in the context of the illustrative configuration of body.It predicts other function distribution and they falls in claim
In the range of book.Finally, the multiple structure and functions presented in various configurations as isolated component may be implemented as one
A combined structure or component.These and other variations, modification, addition and improvement can fall in as defined in the claims
In the range of invention.
Claims (22)
1. a kind of portable electronic device, comprising:
Near-field communication NFC circuit is suitable for emitting via the loop aerial at least the first and second loop aerial terminals
Or NFC electric signal is received, the loop aerial defines closed end antenna during NFC process；
Neighborhood sensing circuit is suitable for receiving the neighborhood sensing electric signals from the loop aerial, and the loop aerial is in neighbour
Open aerial is defined during the sensing process of domain；
First switch, for coupleeing the first annular antenna terminal for the neighborhood sensing circuit；
Second switch, for coupleeing the first annular antenna terminal for the NFC circuit；And
Third switch, for coupleeing the second loop aerial terminal for the NFC circuit.
2. portable electronic device as described in claim 1, which is characterized in that further include: control circuit controls described the
One, second and third switch, wherein during neighborhood sensing operation, the control circuit is closed the first switch and opens the
Two and third switch to open the loop aerial, couple the loop aerial for the neighborhood sensing circuit and institute be isolated
State NFC circuit.
3. portable electronic device as described in claim 1, which is characterized in that further include one control circuit of control, the control
First, second, and third switch described in circuit control processed, wherein the control circuit opens described first during NFC operation
Switch and be closed the second switch and third switch, be closed the loop aerial, by the neighborhood sensing circuit with it is described
Loop aerial keeps apart and couples the loop aerial for the NFC circuit.
4. portable electronic device as claimed in claim 2, which is characterized in that it further include software and selection circuit, it is described soft
Part and selection circuit are for being selectively engaged one or more of described first, second, and third switch so as to the beginning day
Ray mode operates the loop aerial.
5. portable electronic device as claimed in claim 3, which is characterized in that further include software and selection circuit, for selecting
Engage one or more of described first, second, and third switch selecting property to operate the annular with closed end antenna mode
Antenna.
6. portable electronic device as described in claim 1, which is characterized in that based on connecing the electronic equipment as signal
Receipts machine or signal transmitter dynamically control one or more of described first, second, and third switch.
7. portable electronic device as described in claim 1, which is characterized in that in first, second, and third switch
One or more is configured to toggle in the time domain to execute neighborhood sensing operation and NFC operation.
8. portable electronic device as described in claim 1, which is characterized in that the neighborhood sensing circuit and NFC electricity
The part of road formation individual module.
9. portable electronic device as described in claim 1, which is characterized in that the loop aerial includes polycyclic road spiral shape
Antenna.
10. a kind of for providing the electronic equipment of neighborhood detection and near-field communication NFC, the equipment includes:
NFC circuit, for emitting or receiving NFC electric signal via individual antenna, wherein the NFC electric signal includes coming from first
The high frequency NFC signal of external source；And
Neighborhood sensing circuit, for receiving the neighborhood sensing electric signals from the second external source from the individual antenna；
Wherein the NFC circuit and the neighborhood sensing circuit form the part of individual module.
11. electronic equipment as claimed in claim 10, which is characterized in that the NFC circuit is configured to from closed end shape
The individual antenna receives NFC electric signal, and wherein the neighborhood sensing circuit is configured to the list from beginning shape
A antenna receives neighborhood sensing electric signals.
12. electronic equipment as claimed in claim 10, which is characterized in that first external source and second external source are fixed
The identical external equipment of justice.
13. electronic equipment as claimed in claim 10, which is characterized in that first external source and second external source are fixed
The different external equipment of justice.
14. electronic equipment as claimed in claim 10, which is characterized in that further include software and selection circuit, for according to institute
Electronic equipment is stated as signal receiver or signal transmitter to be selectively engaged the NFC circuit or neighborhood sensing electricity
One in road.
15. electronic equipment as claimed in claim 10, which is characterized in that the individual antenna further includes polycyclic road spiral shape day
Line or loop aerial.
16. electronic equipment as claimed in claim 10, which is characterized in that further include switching circuit, for engaging the NFC electricity
One in road or the neighborhood sensing circuit, the switching circuit includes one in passive switch circuit or active switching circuit
It is a.
17. a kind of for providing the electronic equipment of neighborhood detection and near-field communication NFC, the equipment includes switching circuit, described
Switching circuit is used to receive the first signal from the antenna for being configured as open aerial operation and be used for first signal
Neighborhood detection module is directed to detect the proximity with external object, the switching circuit is configured to from being configured as closing
The antenna of end antenna operation receives second signal and the second signal is directed to NFC module to carry out NFC communication.
18. electronic equipment as claimed in claim 17, which is characterized in that the switching circuit includes passive element.
19. electronic equipment as claimed in claim 17, which is characterized in that the switching circuit includes active component.
20. electronic equipment as claimed in claim 17, which is characterized in that the switching circuit is configured to set outside first
It is standby to receive first signal and receive the second signal from the second external equipment.
21. electronic equipment as claimed in claim 20, which is characterized in that first external source and second external source are
Substantially the same equipment.
22. electronic equipment as claimed in claim 20, which is characterized in that first external source and second external source are
Different equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510729307.XA CN105354524B (en) | 2012-03-15 | 2012-03-15 | Near-field communication (NFC) and proximity sensor for portable device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201280071356.3A CN104508687B (en) | 2012-03-15 | 2012-03-15 | Near-field communication (NFC) and proximity sensor for portable set |
| CN201510729307.XA CN105354524B (en) | 2012-03-15 | 2012-03-15 | Near-field communication (NFC) and proximity sensor for portable device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280071356.3A Division CN104508687B (en) | 2012-03-15 | 2012-03-15 | Near-field communication (NFC) and proximity sensor for portable set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105354524A CN105354524A (en) | 2016-02-24 |
| CN105354524B true CN105354524B (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510729307.XA Active CN105354524B (en) | 2012-03-15 | 2012-03-15 | Near-field communication (NFC) and proximity sensor for portable device |
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| CN (1) | CN105354524B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020062077A1 (en) * | 2018-09-28 | 2020-04-02 | 深圳市汇顶科技股份有限公司 | Circuit and electronic device |
Citations (2)
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|---|---|---|---|---|
| CN101958455A (en) * | 2009-07-17 | 2011-01-26 | 苹果公司 | Electronic equipment with capacitive proximity sensor |
| CN101964673A (en) * | 2009-07-24 | 2011-02-02 | 索尼公司 | Communication device, communication scheme determination method, and program |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7576657B2 (en) * | 2006-03-22 | 2009-08-18 | Symbol Technologies, Inc. | Single frequency low power RFID device |
| US8498618B2 (en) * | 2009-06-22 | 2013-07-30 | Mourad Ben Ayed | Systems for intelligent authentication based on proximity |
| KR20110117907A (en) * | 2010-04-22 | 2011-10-28 | 삼성전자주식회사 | Method and apparatus for proximity sensing of a portable terminal |
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2012
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958455A (en) * | 2009-07-17 | 2011-01-26 | 苹果公司 | Electronic equipment with capacitive proximity sensor |
| CN101964673A (en) * | 2009-07-24 | 2011-02-02 | 索尼公司 | Communication device, communication scheme determination method, and program |
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|---|---|
| CN105354524A (en) | 2016-02-24 |
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