CN110333435A - Touch identification detection circuit and wearable equipment - Google Patents
Touch identification detection circuit and wearable equipment Download PDFInfo
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- CN110333435A CN110333435A CN201910441257.3A CN201910441257A CN110333435A CN 110333435 A CN110333435 A CN 110333435A CN 201910441257 A CN201910441257 A CN 201910441257A CN 110333435 A CN110333435 A CN 110333435A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
Abstract
The application relates to a touch identification detection circuit and wearable equipment, wherein, touch identification detection circuit includes: detecting a power supply; a detection circuit; the input end of the gain amplification circuit is connected in parallel with the two ends of the shunt resistor, and the gain amplification circuit is used for amplifying the voltage signal on the shunt resistor and outputting the amplified voltage signal as a detection signal; the input end of the detection circuit is connected with the output end of the gain amplification circuit and is used for detecting the detection signal; the signal conversion circuit is used for converting the detected detection signal into a corresponding touch signal; and the controller is connected with the signal conversion circuit and is used for identifying corresponding touch operation according to the touch signal. The embodiment provided by the application increases the interactive area of the wearable device, so that the interactive operation of the user and the wearable device is more convenient, meanwhile, the structure design is simple, the performance is reliable, the sensitivity is higher, and the user operation experience can be effectively improved.
Description
Technical field
This application involves movable termination field more particularly to a kind of touch recognition detection circuit and a kind of wearable set
It is standby.
Background technique
The intellectual product of existing arm class on the market at present, such as wrist machine, bracelet, wrist-watch, in user to intelligent production
When product interact operation, generally require to operate the screen or key of intellectual product.And above-mentioned existing interactive process is deposited
In following disadvantage:
First, the screen area of arm class intellectual product is smaller, therefore the region that can carry out touch operation is also smaller,
Cause interactive operation not convenient.
Second, since the size of the table body (such as dial plate) of arm class intellectual product is smaller, the size of key
It is smaller.
Therefore arm class intellectual product can be solved by needing a kind of touch recognition detection circuit and wearable device at present
The not convenient problem of interactive operation.
Summary of the invention
In order to solve the above-mentioned technical problem or it at least is partially solved above-mentioned technical problem, this application provides a kind of touchings
Touch recognition detection circuit and wearable device.
In a first aspect, this application provides a kind of touch recognition detection circuit, it to be used for wearable device, it is described wearable to set
Standby includes watchband, and the watchband includes multiple successively end to end chain links, which is characterized in that the touch recognition detection circuit
It include: detection power supply；
Detection circuit, the detection circuit are set on the chain link, and the detection circuit includes the first contact, the second touching
Point and shunt resistance, first contact are connected with the detection power supply, second contact and the one of the shunt resistance
End is connected, the other end ground connection of the shunt resistance；
Gain amplifying circuit, the input terminal of the gain amplifying circuit are parallel to the both ends of the shunt resistance, the increasing
Beneficial amplifying circuit is used to output after the voltage signal amplification on the shunt resistance be detection signal；
Detecting circuit, the input terminal of the detecting circuit are connected with the output end of the gain amplifying circuit, for pair
The detection signal carries out detection；
Signal conversion circuit, the input terminal of the signal conversion circuit are connected with the output end of the detecting circuit, institute
The output end for stating signal conversion circuit is connected with controller, and the signal conversion circuit is used to believe the detection after detection
Number be converted to corresponding touch signal；
The controller is connected with the signal conversion circuit, and the controller is used to be known according to the touch signal
Not corresponding touch operation.
Optionally, the gain amplifying circuit includes:
Transport and placing device, the output end of the transport and placing device are connected with the signal conversion circuit；
One end of first resistance element, first resistance element is connected with one end of the shunt resistance, and described
The other end of one resistance element is connected with the anode of the transport and placing device input terminal；
One end of second resistance element, second resistance element is connected with the other end of the shunt resistance, described
The other end of second resistance element is connected with the cathode of the transport and placing device input terminal.
Optionally, the gain amplifying circuit further include:
Third resistance element, one end of the third resistance element are connected with the other end of second resistance element,
The other end of the third resistance element is connected with the output end of the transport and placing device.
Optionally, the detecting circuit includes:
One end of one-way conduction element, the one-way conduction element is connected with the output end of the gain amplifying circuit,
The conducting direction of the one-way conduction element is opposite with the outbound course of the gain amplifying circuit；
One end of 4th resistance element, the 4th resistance element is connected with the other end of the one-way conduction element,
The other end of 4th resistance element is connected with the signal conversion circuit.
Optionally, the detecting circuit further include:
Capacitive element, one end of the capacitive element are connected with the other end of the 4th resistance element, sent capacitive
The other end of element is grounded；
One end of 5th resistance element, the 5th resistance element is connected with the other end of the 4th resistance element,
The other end of 5th resistance element is grounded.
Optionally, the signal conversion circuit includes:
Power supply source；
Field-effect tube, the grid of the field-effect tube are connected with the output end of the detecting circuit, the field-effect tube
Drain electrode be connected with the power supply source and the controller, the source electrode of field-effect tube ground connection；
One end of 6th resistance element, the 6th resistance element is connected with the drain electrode of the field-effect tube, and described
The other end of six resistance elements is connected with power supply source.
Optionally, the field-effect tube is insulated gate field-effect pipe.
Optionally, the controller is used to identify corresponding touch operation according to the touch signal, specifically:
When the touch signal corresponds to the detection circuit being arranged on any one described chain link, the touch is identified
Operation is button operation；
When the touch signal corresponds to the detection circuit being arranged on multiple chain links, the touch behaviour is identified
It is operated as holding.
Optionally, the controller is used to identify corresponding touch operation according to the touch signal, specifically:
When the touch signal includes continuous multiple sub- touch signals, and multiple sub- touch signals be corresponding in turn in
When the detection circuit being arranged on multiple adjacent chain links, identify that the touch operation is slide.
Second aspect, this application provides a kind of wearable devices, comprising:
Table body；
Watchband is connected with the table body, and the watchband includes multiple successively end to end chain links, sets on the chain link
It is equipped with the touch recognition detection circuit as described in above-mentioned any embodiment.
Above-mentioned technical proposal provided by the embodiments of the present application has the advantages that compared with prior art
This method provided by the embodiments of the present application is provided with touch recognition detection circuit on the watchband of wearable device,
Touch recognition detection circuit includes: detection power supply；Detection circuit, detection circuit are set on chain link, and detection circuit includes first
Contact, the second contact and shunt resistance, the first contact are connected with detection power supply, and the second contact is connected with one end of shunt resistance
It connects, the other end ground connection of shunt resistance；Gain amplifying circuit, the input terminal of gain amplifying circuit are parallel to the two of shunt resistance
End, gain amplifying circuit are used to output after the voltage signal amplification on shunt resistance be detection signal；Detecting circuit, detection electricity
The input terminal on road is connected with the output end of gain amplifying circuit, for carrying out detection to detection signal；Signal conversion circuit, letter
Number input terminal of conversion circuit is connected with the output end of detecting circuit, and the output end of signal conversion circuit is connected with controller
It connects, signal conversion circuit is used to the detection signal after detection being converted to corresponding touch signal；Controller converts electricity with signal
Road is connected, and controller is used to identify corresponding touch operation according to touch signal.People is detected by touch recognition detection circuit
Event when body finger skin and watchband touch so that the watchband of wearable device integrally become can interactive operation region, pole
The earth increase wearable device can interaction area so that the interactive operation of user and wearable device is more convenient, simultaneously
The structure design of above-mentioned touch recognition detection circuit is simple, and sensitivity is higher while reliable performance, can effectively improve user
Operating experience, while there is lower production cost.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without any creative labor, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of hardware structural diagram of embodiment of wearable device provided in an embodiment of the present invention；
Fig. 2 is a kind of hardware schematic of embodiment of wearable device provided by the embodiments of the present application；
Fig. 3 is a kind of hardware schematic of embodiment of wearable device provided by the embodiments of the present application；
Fig. 4 is a kind of hardware schematic of embodiment of wearable device provided by the embodiments of the present application；
Fig. 5 is the structural schematic diagram of touch recognition detection circuit provided by the embodiments of the present application；
Fig. 6 is the structural schematic diagram of wearable device provided by the embodiments of the present application；
Fig. 7 is the signal schematic representation of touch recognition detection circuit provided by the embodiments of the present application；
Fig. 8 is that the signal communication of the controller of touch recognition detection circuit provided by the embodiments of the present application is intended to.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In subsequent description, it is only using the suffix for indicating such as " module ", " component " or " unit " of element
Be conducive to explanation of the invention, itself there is no a specific meaning.Therefore, " module ", " component " or " unit " can mix
Ground uses.
The wearable device provided in the embodiment of the present invention includes that Intelligent bracelet, smartwatch and smart phone etc. move
Dynamic terminal.With the continuous development of Screen Technology, the appearance of the screens form such as flexible screen, Folding screen, smart phone etc. is mobile eventually
End can also be used as wearable device.The wearable device provided in the embodiment of the present invention may include: RF (Radio
Frequency, radio frequency) unit, WiFi module, audio output unit, A/V (audio/video) input unit, sensor, display
The components such as unit, user input unit, interface unit, memory, processor and power supply.
It will be illustrated by taking wearable device as an example in subsequent descriptions, referring to Fig. 1, its each implementation to realize the present invention
A kind of hardware structural diagram of wearable device of example, which may include: RF (Radio
Frequency, radio frequency) unit 101, WiFi module 102, audio output unit 103, A/V (audio/video) input unit 104,
Sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, Yi Ji electricity
The components such as source 111.It will be understood by those skilled in the art that wearable device structure shown in Fig. 1 is not constituted to wearable
The restriction of equipment, wearable device may include perhaps combining certain components or difference than illustrating more or fewer components
Component layout.
It is specifically introduced below with reference to all parts of the Fig. 1 to wearable device:
Radio frequency unit 101 can be used for receiving and sending messages or communication process in, signal sends and receivees, specifically, radio frequency list
Uplink information can be sent to base station by member 101, and after the downlink information that in addition can also be sent base station receives, being sent to can be worn
The processor 110 for wearing equipment is handled, and base station can be to the downlink information that radio frequency unit 101 is sent and be sent out according to radio frequency unit 101
What the uplink information sent generated, it is also possible to actively push away to radio frequency unit 101 after the information update for detecting wearable device
It send, for example, base station can penetrating to wearable device after detecting that geographical location locating for wearable device changes
Frequency unit 101 sends the message informing of geographical location variation, and radio frequency unit 101, can should after receiving the message informing
The processor 110 that message informing is sent to wearable device is handled, and it is logical that the processor 110 of wearable device can control the message
Know on the display panel 1061 for being shown in wearable device；In general, radio frequency unit 101 include but is not limited to antenna, at least one
Amplifier, transceiver, coupler, low-noise amplifier, duplexer etc..In addition, radio frequency unit 101 can also pass through channel radio
Letter communicated with network and other equipment, specifically may include: by wireless communication with the server communication in network system, example
Such as, wearable device can download file resource from server by wireless communication, for example can download and answer from server
With program, after wearable device completes the downloading of a certain application program, if the corresponding file of the application program in server
Resource updates, then the server can be by wireless communication to the message informing of wearable device push resource updates, to remind
User is updated the application program.Any communication standard or agreement can be used in above-mentioned wireless communication, including but not limited to
GSM (Global System of Mobile communication, global system for mobile communications), GPRS (General
Packet Radio Service, general packet radio service), CDMA2000 (Code Division Multiple Access
2000, CDMA 2000), (Wideband Code Division Multiple Access, wideband code division are more by WCDMA
Location), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, time division synchronous
CDMA), (Frequency Division Duplexing-Long Term Evolution, frequency division duplex are long by FDD-LTE
Phase evolution) and TDD-LTE (Time Division Duplexing-Long Term Evolution, time division duplex are drilled for a long time
Into) etc..
In one embodiment, wearable device 100 can access existing communication network by insertion SIM card.
In another embodiment, wearable device 100 can be come real by the way that esim card (Embedded-SIM) is arranged
Existing communication network is now accessed, by the way of esim card, the inner space of wearable device can be saved, reduce thickness.
It is understood that although Fig. 1 shows radio frequency unit 101, but it is understood that, radio frequency unit 101 its
And it is not belonging to must be configured into for wearable device, it can according to need within the scope of not changing the essence of the invention and save completely
Slightly., wearable device 100 can realize the communication connection with other equipment or communication network separately through wifi module 102,
The embodiment of the present invention is not limited thereto.
WiFi belongs to short range wireless transmission technology, and wearable device can help user to receive and dispatch by WiFi module 102
Email, browsing webpage and access streaming video etc., it provides wireless broadband internet access for user.Although Fig. 1
WiFi module 102 is shown, but it is understood that, and it is not belonging to must be configured into for wearable device, it completely can root
It is omitted within the scope of not changing the essence of the invention according to needs.
Audio output unit 103 can be in call signal reception pattern, call mode, record in wearable device 100
When under the isotypes such as mode, speech recognition mode, broadcast reception mode, by radio frequency unit 101 or WiFi module 102 it is received or
The audio data that person stores in memory 109 is converted into audio signal and exports to be sound.Moreover, audio output unit
103 can also provide audio output relevant to the specific function that wearable device 100 executes (for example, call signal reception sound
Sound, message sink sound etc.).Audio output unit 103 may include loudspeaker, buzzer etc..
A/V input unit 104 is for receiving audio or video signal.A/V input unit 104 may include graphics processor
(Graphics Processing Unit, GPU) 1041 and microphone 1042, graphics processor 1041 is in video acquisition mode
Or the image data of the static images or video obtained in image capture mode by image capture apparatus (such as camera) carries out
Reason.Treated, and picture frame may be displayed on display unit 106.Through graphics processor 1041, treated that picture frame can be deposited
Storage is sent in memory 109 (or other storage mediums) or via radio frequency unit 101 or WiFi module 102.Mike
Wind 1042 can connect in telephone calling model, logging mode, speech recognition mode etc. operational mode via microphone 1042
Quiet down sound (audio data), and can be audio data by such acoustic processing.Audio that treated (voice) data can
To be converted to the format output that can be sent to mobile communication base station via radio frequency unit 101 in the case where telephone calling model.
Microphone 1042 can be implemented various types of noises elimination (or inhibition) algorithms and send and receive sound to eliminate (or inhibition)
The noise generated during frequency signal or interference.
In one embodiment, wearable device 100 includes one or more cameras, by opening camera,
It can be realized the capture to image, realize the functions such as take pictures, record a video, the position of camera, which can according to need, to be configured.
Wearable device 100 further includes at least one sensor 105, for example, optical sensor, motion sensor and other
Sensor.Specifically, optical sensor includes ambient light sensor and proximity sensor, wherein ambient light sensor can be according to ring
The light and shade of border light adjusts the brightness of display panel 1061, proximity sensor can when wearable device 100 is moved in one's ear,
Close display panel 1061 and/or backlight.As a kind of motion sensor, accelerometer sensor can detect in all directions
The size of (generally three axis) acceleration, can detect that size and the direction of gravity, can be used to identify mobile phone posture when static
It (for example pedometer, is struck using (such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function
Hit) etc..
In one embodiment, wearable device 100 further includes proximity sensor, can by using proximity sensor
Wearable device can be realized non-contact manipulation, provide more modes of operation.
In one embodiment, wearable device 100 further includes heart rate sensor, when wearing, by close to using
Person can be realized the detecting of heart rate.
In one embodiment, wearable device 100 can also include that fingerprint sensor can by reading fingerprint
Realize the functions such as safety verification.
Display unit 106 is for showing information input by user or being supplied to the information of user.Display unit 106 can wrap
Display panel 1061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode can be used
Forms such as (Organic Light-Emitting Diode, OLED) configure display panel 1061.
In one embodiment, display panel 1061 uses flexible display screen, and wearable using flexible display screen sets
For when wearing, screen is able to carry out bending, to more be bonded.Optionally, the flexible display screen can use OLED screen
Body and graphene screen body, in other embodiments, the flexible display screen is also possible to other display materials, the present embodiment
It is not limited thereto.
In one embodiment, the display panel 1061 of wearable device can take rectangle, ring when convenient for wearing
Around.In other embodiments, other modes can also be taken.
User input unit 107 can be used for receiving the number or character information of input, and generate and wearable device
User setting and the related key signals input of function control.Specifically, user input unit 107 may include touch panel 1071
And other input equipments 1072.Touch panel 1071, also referred to as touch screen collect the touch behaviour of user on it or nearby
Make (for example user uses any suitable objects or attachment such as finger, stylus on touch panel 1071 or in touch panel
Operation near 1071), and corresponding attachment device is driven according to preset formula.Touch panel 1071 may include touching
Two parts of detection device and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch behaviour
Make bring signal, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and
It is converted into contact coordinate, then gives processor 110, and order that processor 110 is sent can be received and executed.This
Outside, touch panel 1071 can be realized using multiple types such as resistance-type, condenser type, infrared ray and surface acoustic waves.In addition to touching
Panel 1071 is controlled, user input unit 107 can also include other input equipments 1072.Specifically, other input equipments 1072
It can include but is not limited to physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, operation
One of bar etc. is a variety of, specifically herein without limitation.
In one embodiment, one or more buttons have can be set in the side of wearable device 100.Button can be with
The various ways such as short-press, long-pressing, rotation are realized, to realize a variety of operating effects.The quantity of button can be different to be multiple
It can be applied in combination between button, realize a variety of operating functions.
Further, touch panel 1071 can cover display panel 1061, when touch panel 1071 detect on it or
After neighbouring touch operation, processor 110 is sent to determine the type of touch event, is followed by subsequent processing device 110 according to touch thing
The type of part provides corresponding visual output on display panel 1061.Although in Fig. 1, touch panel 1071 and display panel
1061 be the function that outputs and inputs of realizing wearable device as two independent components, but in certain embodiments,
Touch panel 1071 and display panel 1061 can be integrated and be realized the function that outputs and inputs of wearable device, specifically herein
Without limitation.For example, processor 110 can be controlled when receiving the message informing of a certain application program by radio frequency unit 101
The message informing show in a certain predeterminable area of display panel 1061 by system, the predeterminable area and touch panel 1071 certain
One region is corresponding, can be to corresponding to area on display panel 1061 by carrying out touch control operation to a certain region of touch panel 1071
The message informing shown in domain is controlled.
Interface unit 108 be used as at least one external device (ED) connect with wearable device 100 can by interface.Example
Such as, external device (ED) may include wired or wireless headphone port, external power supply (or battery charger) port, You Xianhuo
Wireless data communications port, memory card port, the port for connecting the device with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Interface unit 108 can be used for receiving the input from external device (ED) (for example, number
It is believed that breath, electric power etc.) and the input received is transferred to one or more elements in wearable device 100 or can
For transmitting data between wearable device 100 and external device (ED).
In one embodiment, wearable device 100 interface unit 108 using contact structure, by contact with
Corresponding other equipment connection, realizes the functions such as charging, connection.Use contact can be with waterproof.
Memory 109 can be used for storing software program and various data.Memory 109 can mainly include storing program area
The storage data area and, wherein storing program area can (such as the sound of application program needed for storage program area, at least one function
Sound playing function, image player function etc.) etc.；Storage data area can store according to mobile phone use created data (such as
Audio data, phone directory etc.) etc..In addition, memory 109 may include high-speed random access memory, it can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 110 is the control centre of wearable device, utilizes various interfaces and the entire wearable device of connection
Various pieces, by running or execute the software program and/or module that are stored in memory 109, and call and be stored in
Data in memory 109 execute the various functions and processing data of wearable device, to carry out to wearable device whole
Monitoring.Processor 110 may include one or more processing units；Preferably, processor 110 can integrate application processor and modulation
Demodulation processor, wherein the main processing operation system of application processor, user interface and application program etc., modulation /demodulation processing
Device mainly handles wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 110.
Wearable device 100 can also include the power supply 111 (such as battery) powered to all parts, it is preferred that power supply
111 can be logically contiguous by power-supply management system and processor 110, thus charged by power-supply management system realization management,
The functions such as electric discharge and power managed.
Although Fig. 1 is not shown, wearable device 100 can also be including bluetooth module etc., and details are not described herein.It is wearable to set
Standby 100, by bluetooth, can connect with other terminal devices, realize communication and the interaction of information.
Fig. 2-Fig. 4 is please referred to, is the structure under a kind of a kind of embodiment of wearable device provided in an embodiment of the present invention
Schematic diagram.Wearable device in the embodiment of the present invention, including flexible screen.In wearable device expansion, flexible screen is in
Strip；When wearable device is in wearing state, flexible screen bending is annular in shape.Fig. 2 and Fig. 3 show wearable device
Structural schematic diagram when screen is unfolded, Fig. 4 show structural schematic diagram when wearable device screen-bending.
Based on the hardware configuration of above-mentioned wearable device, each embodiment of the method for the present invention is proposed.Based on above-mentioned mobile whole
Hardware configuration and communications network system are held, proposes each embodiment of the method for the present invention.
First embodiment:
As shown in Figure 5 and Figure 6, in the present embodiment, a kind of touch recognition detection circuit is provided, is set for wearable
Standby, the wearable device includes watchband, and the watchband includes multiple successively end to end chain links, which is characterized in that described
Touch recognition detection circuit includes:
Detect power supply Vs；
Detection circuit, the detection circuit are set on the chain link, and the detection circuit includes the first contact, the second touching
Point and shunt resistance Rshunt, first contact are connected with the detection power supply, second contact and shunting electricity
One end of resistance Rshunt is connected, the other end ground connection of the shunt resistance Rshunt；
Gain amplifying circuit, the input terminal of the gain amplifying circuit are parallel to the both ends of the shunt resistance Rshunt,
The gain amplifying circuit is used to output after the voltage signal amplification on the shunt resistance Rshunt be detection signal；
Detecting circuit, the input terminal of the detecting circuit are connected with the output end of the gain amplifying circuit, for pair
The detection signal carries out detection；
Signal conversion circuit, the input terminal of the signal conversion circuit are connected with the output end of the detecting circuit, institute
The output end for stating signal conversion circuit is connected with controller, and the signal conversion circuit is used to believe the detection after detection
Number be converted to corresponding touch signal；
The controller is connected with the signal conversion circuit, and the controller is used to be known according to the touch signal
Not corresponding touch operation.
In practical applications, watchband is made of multiple chain links, and touch recognition detection circuit is provided on each chain link, touching
It touches recognition detection circuit to be made of detection circuit, gain amplifying circuit, detecting circuit and signal conversion circuit, finally will test
Touch signal be transferred to controller.Touch recognition detection circuit includes touching power supply, the first contact, the second contact and shunting
Resistance Rshunt, when being touched between the first contact and the second contact without human skin (such as finger), the first contact and the second touching
It is in an off state between point, at this time the both ends shunt resistance Rshunt no-voltage.When human skin contacts the first contact and second
When contact, crossfire circuit, the both ends of shunt resistance Rshunt are formed between detection power supply Vs, human body resistance and shunt resistance Rshunt
Voltage is generated, can detecte the voltage signal at the both ends shunt resistance Rshunt at this time, voltage signal is put through gain amplifying circuit
Greatly, detecting circuit detection is converted to touch signal using signal conversion circuit, and is sent to the corresponding port of processor, into
And realize the identification to touch signal.
Optionally, the first contact and the second contact may be configured as multiple, and multiple first contacts are serially connected, multiple second touchings
Point be serially connected, when having human body skin contact between any first contact and any second contact, first contact and this second
Contact connection.
In the present embodiment, optionally, as shown in Figure 5 and Figure 6, the gain amplifying circuit includes: transport and placing device D1, described
The output end of transport and placing device D1 is connected with the signal conversion circuit；First resistance element R1, the first resistance element R1's
One end is connected with one end of the shunt resistance Rshunt, the other end and the transport and placing device D1 of the first resistance element R1
The anode of input terminal is connected；One end of second resistance element R2, the second resistance element R2 and the shunt resistance
The other end of Rshunt is connected, and the other end of the second resistance element R2 is connected with the cathode of the transport and placing device D1 input terminal
It connects.
Optionally, the gain amplifying circuit further include:
Third resistance element R3, the other end phase of one end of the third resistance element R3 and the second resistance element R2
Connection, the other end of the third resistance element R3 are connected with the output end of the transport and placing device D1.
In practical applications, optionally, transport and placing device D1 is OPA transport and placing device D1, such as OPA2604, transport and placing device D1 itself setting
There are feeder ear and ground terminal, feeder ear is connected with power supply source Vdd, ground terminal ground connection.Gain amplifying circuit passes through transport and placing device D1
The amplitude of the voltage signal at the both ends shunt resistance Rshunt is subjected to gain amplification, thus the skin of time limit a variety of different impedance values
When contact, voltage signal can be accurately identified, realizes the promotion of signal-to-noise ratio, effectively improves the inspection of touch recognition detection circuit
Survey sensitivity.
In the present embodiment, optionally, as shown in Figure 5 and Figure 6, the detecting circuit includes:
One end of one-way conduction element, the one-way conduction element is connected with the output end of the gain amplifying circuit,
The conducting direction of the one-way conduction element is opposite with the outbound course of the gain amplifying circuit；
One end of 4th resistance element R4, the 4th resistance element R4 are connected with the other end of the one-way conduction element
It connects, the other end of the 4th resistance element R4 is connected with the signal conversion circuit.
Optionally, the detecting circuit further include:
Capacitive element C, one end of the capacitive element C are connected with the other end of the 4th resistance element R4, are sent
The other end of capacitive element C is grounded；
5th resistance element R5, one end of the 5th resistance element R5 and the other end phase of the 4th resistance element R4
Connection, the other end ground connection of the 5th resistance element R5.
In practical applications, detecting circuit has both the effect of detection and energy storage, and specifically, detecting circuit can pass through capacitive member
Part C stores the energy for the detection signal that gain amplifying circuit exports, while by single-phase breakover element to AC signal
Positive detection is carried out, direct current is finally stored in capacitive element C with the signal exchanged.5th resistance element R5 is used for capacitive member
The energy of part C storage carries out a point release, after human skin is detached from the first contact and the second contact, the energy of capacitive element C storage
Amount is discharged by the 5th resistance element R5.Since there are Hz noises in alternating current environment, can there are AC noise, electric signal
It can be absorbed by the body, in the contact region of human skin contact chain link, electric signal is resistive by Human skin resistance and first
Enter gain amplifying circuit after element R1, and then enter detecting circuit, detecting circuit can effectively be received through gain amplifying circuit
Amplified direct current signal and AC signal, and by realizing the control to signal conversion circuit after capacitive element C energy storage.
Specifically, when detecting circuit works, as shown in fig. 7, wherein signal 702 is AC signal, which includes
DC component, frequency 50Hz, maximum amplitude 4.4V, minimum amplitude 0.4V.Signal 704 is by detecting circuit detection
With the approximate DC signal after energy storage, alternating-current magnitude is 1/6th of the AC signal of input, so that the minimum value of signal
It greatly improves, and then improves the sensitivity of touch recognition detection circuit.
In the present embodiment, optionally, as shown in figure 8, the signal conversion circuit includes:
Power supply source VddIO；
Field-effect tube D2, the grid of the field-effect tube D2 are connected with the output end of the detecting circuit, the field effect
Should the drain electrode of pipe D2 be connected with the power supply source and the controller, the source electrode ground connection of the field-effect tube D2；
One end of 6th resistance element R6, the 6th resistance element R6 are connected with the drain electrode of the field-effect tube D2,
The other end of the 6th resistance element R6 is connected with power supply source.
Optionally, the field-effect tube D2 is insulated gate field-effect pipe D2.
In practical applications, signal conversion circuit is used for electric frequency transformation of the time limit to detecting circuit output signal, letter
Number conversion circuit is connected with controller (such as AP or MCU), and then the skin contact time in time limit effectively reports.Work as human skin
When effectively contact occurs with the first contact and the second contact, the virtual value of the touch signal of detecting circuit output is higher than field-effect tube
The turn-on voltage Vgs of D2, field-effect tube D2 is connected at this time, therefore the output valve KEY_IO of signal conversion circuit is set to low electricity
Flat, controller confirms the event that respective link is touched by skin at this time.After human skin leaves contact, in detecting circuit
Capacitive element C is discharged by the 5th resistance element R5, and the virtual value of detecting circuit output signal is lower than Vgs, field-effect tube at this time
D2 cut-off, the output valve KEY_IO of signal conversion circuit is set to high level at this time, and controller confirms the touch of respective link
Event terminates, and user's finger has been removed.
In the present embodiment, optionally, as shown in figure 8, the controller is used to identify correspondence according to the touch signal
Touch operation, specifically:
When the touch signal corresponds to the detection circuit being arranged on any one described chain link, the touch is identified
Operation is button operation；
When the touch signal corresponds to the detection circuit being arranged on multiple chain links, the touch behaviour is identified
It is operated as holding；
When the touch signal includes continuous multiple sub- touch signals, and multiple sub- touch signals be corresponding in turn in
When the detection circuit being arranged on multiple adjacent chain links, identify that the touch operation is slide.
In practical applications, watchband is made of n end to end chain links, and corresponding detection is provided on each chain link
Circuit.1st to the time value of detection circuit is corresponded on n block chain link is respectively KEY_IO1, KEY_IO2 ... KEY_IOn, and point
It is not input to corresponding port GPIO1, GPIO2 ... GPIOn on controller.When user touches the contact on n-th piece of chain link,
The corresponding touch signal of the detection circuit of respective link is denoted as touch signal n, and reported event value KEY_IOn is low level
(LOW), controller (MCU/AP) confirms the button operation for n-th piece of chain link at this time.When user touches multiple chain links simultaneously
On contact when, for example contact on the 1st, 2,3 piece of chain link is triggered simultaneously, corresponding reported event value KEY_IO1, KEY_IO2,
KEY_IO3 is low level, and controller confirms the gripping operation for watchband at this time.When user connects according to certain sequencing
When the continuous contact touched on multiple chain links, such as according to the sequence for successively touching the 4th piece of chain link, the 5th piece of chain link, the 6th piece of chain link,
The successive reported event value KEY_IO4 of the time sequencing being triggered according to contact is low level, KEY_IO4 is high level, KEY_IO5
For low level, KEY_IO5 be high level, KEY_IO6 is low level, KEY_IO6 is high level, and controller, which confirms, at this time is directed to
The slide of multiple chain links on watchband.
Second embodiment:
As shown in fig. 6, in the present embodiment, providing a kind of wearable device, comprising:
Table body；
Watchband is connected with the table body, and the watchband includes multiple successively end to end chain links, sets on the chain link
It is equipped with touch recognition detection circuit as described in the first embodiment.Therefore, which includes institute in first embodiment
The whole beneficial effects for the touch recognition detection circuit stated, details are not described herein.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (10)
1. a kind of touch recognition detection circuit is used for wearable device, the wearable device includes watchband, and the watchband includes
Multiple successively end to end chain links, which is characterized in that the touch recognition detection circuit includes:
Detect power supply；
Detection circuit, the detection circuit are set on the chain link, the detection circuit include the first contact, the second contact and
Shunt resistance, first contact are connected with the detection power supply, one end phase of second contact and the shunt resistance
Connection, the other end ground connection of the shunt resistance；
Gain amplifying circuit, the input terminal of the gain amplifying circuit are parallel to the both ends of the shunt resistance, and the gain is put
Big circuit is used to output after the voltage signal amplification on the shunt resistance be detection signal；
Detecting circuit, the input terminal of the detecting circuit are connected with the output end of the gain amplifying circuit, for described
It detects signal and carries out detection；
Signal conversion circuit, the input terminal of the signal conversion circuit are connected with the output end of the detecting circuit, the letter
The output end of number conversion circuit is connected with controller, and the signal conversion circuit is used to turn the detection signal after detection
It is changed to corresponding touch signal；
The controller is connected with the signal conversion circuit, and the controller is used for according to touch signal identification pair
The touch operation answered.
2. touch recognition detection circuit according to claim 1, which is characterized in that the gain amplifying circuit includes:
Transport and placing device, the output end of the transport and placing device are connected with the signal conversion circuit；
One end of first resistance element, first resistance element is connected with one end of the shunt resistance, first resistance
The other end of property element is connected with the anode of the transport and placing device input terminal；
One end of second resistance element, second resistance element is connected with the other end of the shunt resistance, and described second
The other end of resistance element is connected with the cathode of the transport and placing device input terminal.
3. touch recognition detection circuit according to claim 2, which is characterized in that the gain amplifying circuit further include:
Third resistance element, one end of the third resistance element is connected with the other end of second resistance element, described
The other end of third resistance element is connected with the output end of the transport and placing device.
4. touch recognition detection circuit according to claim 1, which is characterized in that the detecting circuit includes:
One end of one-way conduction element, the one-way conduction element is connected with the output end of the gain amplifying circuit, described
The conducting direction of one-way conduction element is opposite with the outbound course of the gain amplifying circuit；
One end of 4th resistance element, the 4th resistance element is connected with the other end of the one-way conduction element, described
The other end of 4th resistance element is connected with the signal conversion circuit.
5. touch recognition detection circuit according to claim 4, which is characterized in that the detecting circuit further include:
Capacitive element, one end of the capacitive element are connected with the other end of the 4th resistance element, sent capacitive element
The other end ground connection；
One end of 5th resistance element, the 5th resistance element is connected with the other end of the 4th resistance element, described
The other end of 5th resistance element is grounded.
6. touch recognition detection circuit according to claim 1, which is characterized in that the signal conversion circuit includes:
Power supply source；
Field-effect tube, the grid of the field-effect tube are connected with the output end of the detecting circuit, the leakage of the field-effect tube
Pole is connected with the power supply source and the controller, the source electrode ground connection of the field-effect tube；
One end of 6th resistance element, the 6th resistance element is connected with the drain electrode of the field-effect tube, the 6th resistance
The other end of property element is connected with power supply source.
7. touch recognition detection circuit according to claim 6, which is characterized in that the field-effect tube is insulated gate electrode field
Effect pipe.
8. touch recognition detection circuit according to claim 1, which is characterized in that the controller is used for according to the touching
The corresponding touch operation of signal identification is touched, specifically:
When the touch signal corresponds to the detection circuit being arranged on any one described chain link, the touch operation is identified
For button operation；
When the touch signal corresponds to the detection circuit being arranged on multiple chain links, identify that the touch operation is
Hold operation.
9. touch recognition detection circuit according to claim 1, which is characterized in that the controller is used for according to the touching
The corresponding touch operation of signal identification is touched, specifically:
When the touch signal includes continuous multiple sub- touch signals, and multiple sub- touch signals are corresponding in turn in multiple
When the detection circuit being arranged on the adjacent chain link, identify that the touch operation is slide.
10. a kind of wearable device characterized by comprising
Table body；
Watchband is connected with the table body, and the watchband includes multiple successively end to end chain links, is provided on the chain link
Touch recognition detection circuit as claimed in any one of claims 1-9 wherein.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910441257.3A CN110333435B (en) | 2019-05-24 | 2019-05-24 | Touch identification detection circuit and wearable equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910441257.3A CN110333435B (en) | 2019-05-24 | 2019-05-24 | Touch identification detection circuit and wearable equipment |
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| CN110333435B CN110333435B (en) | 2022-05-13 |
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| CN110333435B (en) | 2022-05-13 |
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