CN106295465A - A kind of fingerprint detector and electronic equipment - Google Patents
A kind of fingerprint detector and electronic equipment Download PDFInfo
- Publication number
- CN106295465A CN106295465A CN201510252671.1A CN201510252671A CN106295465A CN 106295465 A CN106295465 A CN 106295465A CN 201510252671 A CN201510252671 A CN 201510252671A CN 106295465 A CN106295465 A CN 106295465A
- Authority
- CN
- China
- Prior art keywords
- conductor
- fingerprint
- fingerprint detector
- signal
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Image Input (AREA)
Abstract
The invention discloses a kind of fingerprint detector and electronic equipment, this fingerprint detector includes: fingerprint identification module, for identifying the fingerprint of user；Sensing device, including at least two conductors, conductor is arranged on the edge of fingerprint identification module；Testing circuit, is connected with each conductor respectively, for detecting the capacitance on conductor.This conductor is self-capacitance conductor, the finger of user near this conductor time, corresponding self-capacitance will be produced on this conductor, thus by the capacitance variation on detection conductor, just can detect the movement on fingerprint detector of the finger of user and moving direction, thus carry out the response of correspondence according to the movement of the finger of user and moving direction.
Description
Technical field
The application relates to electronic technology field, particularly relates to a kind of fingerprint detector and electronic equipment.
Background technology
Along with electronic technology develops, various portable electric appts also get more and more, such as mobile phone, flat board electricity
The portable electric appts such as brain.
Current electronic equipment can this be all a fingerprint detector, this fingerprint detector is provided with one
Fingerprint identification module, this fingerprint identification module can detect the finger print information of the user of this electronic equipment, from
And realize the purposes such as unlocked by fingerprint, so so that electronic equipments safety is higher, but current fingerprint
The function of detector is the most single, and then makes the utilization rate of fingerprint detector relatively low.
Summary of the invention
Embodiments provide a kind of fingerprint detector and electronic equipment, in order to solve in prior art when
The function of the fingerprint detector of phase is the most single, and then makes the relatively low problem of the utilization rate of fingerprint detector.
Its concrete technical scheme is as follows:
A kind of fingerprint detector, including:
Fingerprint identification module, for identifying the fingerprint of user；
Sensor, including at least two conductors, each conductor in described at least two conductor respectively with offer
The drive circuit driving signal connects, and described at least two conductor is arranged on the edge of described fingerprint identification module；
Testing circuit, is connected with each conductor respectively, for detecting the pending signal on described conductor.
Optionally, described detection device comprises four conductors, and described four conductors surround a rectangle.
Optionally, described testing circuit includes:
Data selector, is connected with each conductor respectively, for selecting the pending letter detected on a conductor
Number；
Chopper stabilized amplifier, carries out computing for the described pending signal exporting described data selector
Process, output the first process signal；
Demodulator circuit, is connected with described chopper stabilized amplifier, is used for demodulating described chopper stabilized amplifier defeated
The the first process signal gone out, and export the second process signal after demodulation；
Programmable gain amplifier, is connected with described demodulator circuit, for the institute exporting described demodulator circuit
State the second process signal and carry out gain process, and export the 3rd process signal；
Numeral analog-digital converter, is connected with described programmable gain amplifier, for described programmable-gain
The described 3rd of amplifier output processes signal and carries out analog-to-digital conversion process, and obtains fourth process signal；
Wave filter, is connected with described numeral analog-digital converter, for described numeral analog-digital converter output
Described fourth process signal is filtered processing, and obtains the 5th process signal.
Optionally, described chopper stabilized amplifier includes: the first switch, second switch, the 3rd switch, the
Four switches, the first electric capacity, the second electric capacity, first integrator, second integral device, wherein,
One end of described first switch connects the input of described first integrator, and the other end connects described data
Selector；
One end of described second switch connects the input of described second integral device, and the other end connects described data
Selector；
After described 3rd switch is in parallel with described first electric capacity, two ends are connected respectively to described first integrator
Described input and outfan；
After described 4th switch is in parallel with described second electric capacity, two ends are connected respectively to described second integral device
Described input and outfan；
Another input termination first power supply of described first integrator, outfan is connected to demodulator circuit；
Another input termination second source of described second integral device, outfan is connected to demodulator circuit.
Optionally, described demodulator circuit, specifically for eliminating at the first of described chopper stabilized amplifier output
DC component in reason signal, and be demodulated processing to the first process signal eliminating DC component, defeated
Go out the second process signal.
A kind of electronic equipment, this electronic equipment includes:
Housing；
Processor, is arranged in described housing；
Fingerprint detector, is connected with described processor, and described fingerprint detector is above-mentioned fingerprint detector.
Embodiments providing a kind of fingerprint detector, this fingerprint detector includes: fingerprint identification module,
For identifying the fingerprint of user；Sensing device, including at least two conductors, conductor is arranged on fingerprint recognition
The edge of module；Testing circuit, is connected with each conductor respectively, for detecting the capacitance on conductor.Should
Conductor is self-capacitance conductor, the finger of user near this conductor time, on this conductor by produce corresponding from
Electric capacity, thus by the capacitance variation on detection conductor, it is possible to the finger of detection user is examined at fingerprint
Survey the movement on device and moving direction, thus the movement and moving direction according to the finger of user is carried out
Corresponding response.
In embodiments of the present invention, this fingerprint detector is possible not only to realize the detection to fingerprint, it is also possible to logical
Cross the sensing device on fingerprint detector and testing circuit determines that the finger of user is on fingerprint detector
Slide, i.e. user finger is left cunning or right cunning on fingerprint detector.So that fingerprint inspection
Survey device and with the slide of user finger, and then the functional of fingerprint detection and practicality can be improved.
Accompanying drawing explanation
Fig. 1 is one of structural representation of a kind of fingerprint detector in the embodiment of the present invention；
Fig. 2 is the structural representation of testing circuit in the embodiment of the present invention；
Fig. 3 is the electrical block diagram of chopper stabilized amplifier in the embodiment of the present invention；
Fig. 4 is in the embodiment of the present invention the two of the structural representation of a kind of fingerprint detector；
Fig. 5 is in the embodiment of the present invention the three of the structural representation of a kind of fingerprint detector.
Detailed description of the invention
In order to solve the function singleness of fingerprint detector in prior art and the problem that utilization rate is relatively low, this
Bright embodiment provides a kind of fingerprint detector, and this fingerprint detector includes: fingerprint identification module, is used for knowing
The fingerprint of other user；Sensing device, including at least two conductors, conductor is arranged on fingerprint identification module
Edge；Testing circuit, is connected with each conductor respectively, for detecting the capacitance on conductor.This conductor is
Self-capacitance conductor, the finger of user near this conductor time, this conductor will produce corresponding self-capacitance,
Thus by the capacitance variation on detection conductor, it is possible to the finger of detection user is on fingerprint detector
Movement and moving direction, thus the movement and moving direction according to the finger of user carries out correspondence
Response.
The major scheme of the fingerprint detector in the explanation embodiment of the present invention in above-mentioned scheme, below by attached
Technical solution of the present invention is described in detail by figure and specific embodiment, it will be appreciated that the embodiment of the present invention
And the concrete technical characteristic in embodiment is the explanation to technical solution of the present invention rather than restriction,
In the case of not conflicting, the concrete technical characteristic in the embodiment of the present invention and embodiment can be mutually combined.
It is illustrated in figure 1 the structural representation of a kind of fingerprint detector in the embodiment of the present invention, this fingerprint detection
Device includes:
Fingerprint identification module 101, contains multiple detection sub-unit, each detection in fingerprint identification module 101
Subelement user detects the partial fingerprints information of finger, and the array being made up of these detection sub-unit can this refer to
Stricture of vagina identification module, thus realize the fingerprint detection to user, and then can be made by this fingerprint recognition
The finger print information of user.
Sensing device 102, this sensing device 102 is made up of at least two conductor, and conductor is arranged on fingerprint recognition
The edge of module 101.
Testing circuit 103, is connected with each conductor respectively, for detecting the capacitance on described conductor.
In FIG, sensing device 102 contains the first conductor and the second conductor, the first conductor and the
Two conductors are self-capacitance conductor.
In embodiments of the present invention, in order to realize the detection of the capacitance to the first conductor and the second conductor, because of
This, the first conductor and the second conductor are all connected to testing circuit 103, and this testing circuit 103 is used for detecting
Capacitance on first conductor and the second conductor.
Below the operation principle of this fingerprint detector is described in detail.
First, from the point of view of, when detecting, real-time is led by the testing circuit on this fingerprint detector to first
Capacitance on body and the second conductor detects.
If user by finger near first conductor on the left side time, owing to the first conductor is self-capacitance conductor,
Therefore the capacitance on this first conductor will change, it is, the capacitance on the first conductor will increase.
The testing circuit 103 being now connected with the first conductor can detect the change of the capacitance on the first conductor,
Namely this testing circuit 103 can specifically detect the capacitance on the first conductor, finally goes back testing circuit
103, by exporting the capacitance of the first conductor with the form of numerical value, namely characterize on the second conductor with numerical value
The size of capacitance.
Certainly, the capacitance if the finger of user is on second conductor on the right, on this second conductor
Also will change, it is, the capacitance on the second conductor will increase, the meeting that testing circuit 103 is same
The capacitance on the second conductor detected, finally characterize the capacitance size of the second conductor with the form of numerical value.
Then, it is mounted with that the electronic equipment of this fingerprint detector is by by the capacitance detected and predetermined threshold value
Compare and determine whether there is object near the first conductor or the second conductor, such as detect that first leads
When capacitance on body exceedes predetermined threshold value, then explanation has object near the first conductor, now this electronic equipment
By carrying out the response of correspondence, if the capacitance detected on the second conductor exceedes predetermined threshold value, then illustrate
Having object near the second conductor, now this electronic equipment also will carry out the response of correspondence.
Further, in embodiments of the present invention, can also realize using by the first conductor and the second conductor
Person's finger slide on fingerprint detector.Specifically, if user by finger by fingerprint detection
Time slip to the right in the left side of device, user finger first can be near the first conductor, now on the first conductor
Capacitance will increase, and when the finger of user slides the most to the right, the finger of user will be far from first and leads
Body, and gradually close to the second conductor, now the capacitance on the first conductor will reduce, and the second conductor
Capacitance will be gradually increased.This fingerprint detector is by detecting that the capacitance on the first conductor is by reducing greatly
Process may determine that user is to carry out the operation slided, further according to the capacitance on the second conductor
The finger that be can determine that user by the process of little increase is slip from left to right.
In like manner, for turn left from the right side slide process too, the second conductor first can be detected
Capacitance process from big to small, then can detect the capacitance of the first conductor from the big process of little change,
It is assured that the finger of this user right-to-left on fingerprint detector afterwards by the change of this capacitance
Slide.
Further, in order to ensure testing circuit 103 to the first conductor and the detection of the capacitance of the second conductor,
Therefore as in figure 2 it is shown, this testing circuit 103 contains data selector 201 chopper stabilized amplifier 202,
Demodulator circuit 203, programmable gain amplifier 204, numeral analog-digital converter 205, wave filter 206.
Specifically, data selector 201 is for selecting to export the signal detected on some conductor.Letter
From the point of view of singly, this data selector 201 is exactly that signal carries out selecting output.
Chopper stabilized amplifier 202, for according to the capacitance that detects, export that this capacitance is corresponding first
Process signal.As it is shown on figure 3, this chopper stabilized amplifier 202 contains the first switch 301, second switch
302, the 3rd switch the 303, the 4th switch 304, first electric capacity the 305, second electric capacity 306, first integrator
307, second integral device 308, one end of the first switch 301 connects the input of first integrator 307, separately
One end connects data selector 201.
One end of second switch 302 connects the input of second integral device 308, and the other end connects data and selects
Device 201.
After 3rd switch 303 is in parallel with the first electric capacity 305, two ends are connected respectively to first integrator 307
Input and input.
After 4th switch 304 is in parallel with the second electric capacity 306, two ends are connected respectively to second integral device 308
Input and outfan.
Another input of first integrator 307 connects the first power supply, and outfan is connected to demodulator circuit 203.
Another input of second integral device 308 connects second source, and outfan is connected to demodulator circuit 203.
When the signal of data selector 201 output inputs from first integrator 307, the first switch 301 Hes
Second switch 302 closes, and the 3rd switch 303 and the 4th switch 304 disconnection, second integral device 308 is carried out
Resetting, now first integrator 307 is output as Vint1, and Vint1 here can pass through formula below
Obtain:
Vint1=Vup+ (Vup-Vdw) * Cs/C1
Wherein, Vup characterizes the magnitude of voltage of the first power supply being connected with first integrator 307, and Vdw characterizes
The magnitude of voltage of the second source being connected with second integral device 308, Cs characterizes the capacitance on conductor, C1
Characterize the integration capacitor value in first integrator 307.
In like manner, when the signal of data selector 201 output inputs from second integral device 308, the first switch
301 and second switch 302 disconnect, the 3rd switch 303 and the 4th switch 304 Guan Bi, first integrator 307
Resetting, now second integral device 308 is output as Vint2, and Vint here can be obtained by equation below
Arrive:
Vint2=Vdw+ (Vdw-Vup) * Cs/C2
Wherein, Vup characterizes the magnitude of voltage of the first power supply being connected with first integrator 307, and Vdw characterizes
The magnitude of voltage of the second source being connected with second integral device 308, Cs characterizes the capacitance on conductor, C2
Characterize the integration capacitor value on second integral device 308.
Further, in order to improve the noise resisting ability of testing circuit, need to maximize, therefore Vdw-Vup
Vup to try one's best close to supply voltage, and the closely voltage that Vdw is to be tried one's best, ensure integrator amplifier simultaneously
Normal work.
By this circuit structure, so that the output result of chopper stabilized amplifier 202 and the electricity on conductor
Capacitance is directly proportional, thus is just capable of determining that on this conductor by the output result of chopper stabilized amplifier 202
The change of capacitance.
Owing to the result of last output needs, for characterizing the numerical value of capacitance on conductor, therefore to put at chopped wave stabilizing
After big device 202 exports a first process signal corresponding to capacitance, demodulator circuit 203 will receive this
First processes signal, and demodulates this first process signal, obtains the second process signal, then processes second
Signal exports to programmable gain amplifier 204, and then programmable gain amplifier 204 is defeated to this demodulator circuit
The signal gone out carries out gain process, this signal of amplification the most at double, thus obtains the 3rd process signal.
After programmable gain amplifier 204 carries out gain process to this signal, the 3rd process letter of output
Number will be transferred to numeral analog-digital converter 205, this numeral analog-digital converter 205 is used for putting programmable-gain
3rd process signal of big device 204 output carries out analog-to-digital conversion process.Specifically, due to this electric capacity last
Value is to obtain with the form of numerical value, so needing the digital signal by programmable gain amplifier 204 exports to turn
Being changed to analogue signal, therefore programmable gain amplifier 204 is just exported by this numeral analog-digital converter 205
Digital signal through gain process is converted to analogue signal.
After digital analog converter 205 converts digital signals into analogue signal, digital analog converter 205
Can be by fourth process signal, it may be assumed that analogue signal, transmission to wave filter 206 processes, this wave filter 206
Analogue signal for exporting digital analog converter 205 is filtered processing, say, that digital simulation
The analogue signal of transducer 205 output is not likely to be pure analogue signal, it is therefore desirable to by wave filter 206
Filter out the digital signal in analogue signal, and filter away issuable noise etc., can be so
The analogue signal of last output more accurately complete.
By the description in above-described embodiment, this fingerprint detector is possible not only to realize the detection to fingerprint, also
The finger of user can be determined by the sensing device 102 on fingerprint detector and testing circuit 103
Slide on fingerprint detector, i.e. user finger are left cunning or right cunning on fingerprint detector.
So that fingerprint detector with the slide of user finger, and then can improve the function of fingerprint detection
Property and practicality.
Further, in the above-described embodiment, what the sensing device 102 of this fingerprint detector comprised is two
Conductor, thus ensure that sensing device 102 is able to detect that user finger left and right on fingerprint detector is sliding
Dynamic operation.
So that the sensing device 102 on fingerprint detector is able to detect that the finger of user is examined at fingerprint
Surveying the slide on the four direction on device, therefore sensing device 102 is except comprising the first conductor and the
Outside two conductors, it is also possible to comprise the 3rd conductor and the 4th conductor (as shown in Figure 4), in the diagram, be somebody's turn to do
3rd conductor and the 4th conductor are all disposed within the edge of fingerprint identification module 101, the 3rd conductor and the 4th
Conductor and the first conductor and the second conductor surround a rectangular area, and fingerprint identification module 101 is positioned at this
In rectangular area.
The sensing device 102 consisted of the first conductor and the second conductor can detect that user finger exists
Left cunning on fingerprint detector and right cunning, can be realized user by the 3rd conductor and the 4th conductor
The upper cunning of finger and downslide, certainly, to the 3rd conductor and the detection and first of the capacitance of the 4th conductor
The detection method of conductor is identical, the most just repeats no more.
Therefore, the fingerprint detector shown in Fig. 4 can detect user finger on fingerprint detector from
The slide of from left to right, the slide of right-to-left, top-down slide and from bottom to top
Slide.And then ensure that fingerprint detector can detect that the finger of user is on fingerprint detector
The slide of all directions.
Further, in embodiments of the present invention, this fingerprint detector can also is that structure as shown in Figure 5,
In the structure shown in Fig. 5, the sensing device 102 in this fingerprint detector contains 6 conductors, and these are 6 years old
Individual conductor defines positive 6 limit shapes, can be more accurately to use by the structure in these positive 6 limit shapes
The slip detection on fingerprint detector of the finger of person, such as finger is in the upper left corner of fingerprint detector to the right
Inferior horn slides, and this slide just can accurately be detected by the fingerprint detector shown in Fig. 5.
Certainly, in embodiments of the present invention, this fingerprint detector except can be shown in Fig. 4 and Fig. 5
Structure outside, it is also possible to be other results, such as sensing device 102 be adjusted to and comprise 8 conductors,
Or sensing device 102 is adjusted to the fingerprint detector comprising 10 conductors.So that this refers to
Stricture of vagina detector can more comprehensively detect in the finger of user all directions on fingerprint detector
Slide.
It is that in embodiments of the present invention, testing circuit 103 is except the present embodiment institute it addition, also need to explanation
Outside the circuit structure enumerated, other circuit structures that can realize identical function are also contained in the technology of the present invention
In the range of being protected of scheme.
In sum, in embodiments of the present invention, in this fingerprint detector except comprise fingerprint identification module it
Outward, also comprise the sensing device of the slide that can detect user finger on fingerprint detector, and
The slip of the finger of this user can be accurately analyzed by the testing circuit being connected with sensing device
Direction, so that the electronic equipment arranging this fingerprint detector can be accurately according to the hands of user
The glide direction referred to carries out the response of correspondence.
Further, in embodiments of the present invention, additionally providing a kind of electronic equipment, this electronic equipment contains
Housing, processor, fingerprint detector, wherein,
Processor is arranged in this housing, and processor is connected with fingerprint detector, and fingerprint detector herein is just
For above-mentioned fingerprint detector.The concrete structure of this fingerprint detector and realize principle in the above embodiments
In be described in detail, the most unnecessary repeat.
Although having been described for the preferred embodiment of the application, but one of ordinary skilled in the art once learning
Basic creative concept, then can make other change and amendment to these embodiments.So, appended power
Profit requires to be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the application scope.
Obviously, those skilled in the art can carry out various change and modification without deviating from this Shen to the application
Spirit and scope please.So, if the application these amendment and modification belong to the application claim and
Within the scope of its equivalent technologies, then the application is also intended to comprise these change and modification.
Claims (6)
1. a fingerprint detector, it is characterised in that including:
Fingerprint identification module, for identifying the fingerprint of user；
Sensor, including at least two conductors, each conductor in described at least two conductor respectively with offer
The drive circuit driving signal connects, and described at least two conductor is arranged on the edge of described fingerprint identification module；
Testing circuit, is connected with each conductor respectively, for detecting the pending signal on described conductor.
2. fingerprint detector as claimed in claim 1, it is characterised in that described detection device comprises four
Conductor, described four conductors surround a rectangle.
3. fingerprint detector as claimed in claim 1, it is characterised in that described testing circuit includes:
Data selector, is connected with each conductor respectively, for selecting the pending letter detected on a conductor
Number；
Chopper stabilized amplifier, carries out computing for the described pending signal exporting described data selector
Process, output the first process signal；
Demodulator circuit, is connected with described chopper stabilized amplifier, is used for demodulating described chopper stabilized amplifier defeated
The the first process signal gone out, and export the second process signal after demodulation；
Programmable gain amplifier, is connected with described demodulator circuit, for the institute exporting described demodulator circuit
State the second process signal and carry out gain process, and export the 3rd process signal；
Numeral analog-digital converter, is connected with described programmable gain amplifier, for described programmable-gain
The described 3rd of amplifier output processes signal and carries out analog-to-digital conversion process, and obtains fourth process signal；
Wave filter, is connected with described numeral analog-digital converter, for described numeral analog-digital converter output
Described fourth process signal is filtered processing, and obtains the 5th process signal.
4. fingerprint detector as claimed in claim 3, it is characterised in that described chopper stabilized amplifier bag
Include: the first switch, second switch, the 3rd switch, the 4th switch, the first electric capacity, the second electric capacity, first
Integrator, second integral device, wherein,
One end of described first switch connects the input of described first integrator, and the other end connects described data
Selector；
One end of described second switch connects the input of described second integral device, and the other end connects described data
Selector；
After described 3rd switch is in parallel with described first electric capacity, two ends are connected respectively to described first integrator
Described input and outfan；
After described 4th switch is in parallel with described second electric capacity, two ends are connected respectively to described second integral device
Described input and outfan；
Another input termination first power supply of described first integrator, outfan is connected to demodulator circuit；
Another input termination second source of described second integral device, outfan is connected to demodulator circuit.
5. fingerprint detector as claimed in claim 3, it is characterised in that described demodulator circuit, specifically uses
DC component in the first process signal eliminating the output of described chopper stabilized amplifier, and straight to eliminating
First process signal of flow component is demodulated processing, output the second process signal.
6. an electronic equipment, it is characterised in that this electronic equipment includes:
Housing；
Processor, is arranged in described housing；
Fingerprint detector, is connected with described processor, and described fingerprint detector is arbitrary power in claim 1-5
Fingerprint detector described in Xiang.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510252671.1A CN106295465A (en) | 2015-05-18 | 2015-05-18 | A kind of fingerprint detector and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510252671.1A CN106295465A (en) | 2015-05-18 | 2015-05-18 | A kind of fingerprint detector and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106295465A true CN106295465A (en) | 2017-01-04 |
Family
ID=57631126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510252671.1A Pending CN106295465A (en) | 2015-05-18 | 2015-05-18 | A kind of fingerprint detector and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106295465A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018177104A1 (en) * | 2017-04-01 | 2018-10-04 | 京东方科技集团股份有限公司 | Fingerprint identification device, display substrate and display device |
-
2015
- 2015-05-18 CN CN201510252671.1A patent/CN106295465A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018177104A1 (en) * | 2017-04-01 | 2018-10-04 | 京东方科技集团股份有限公司 | Fingerprint identification device, display substrate and display device |
| US10817699B2 (en) | 2017-04-01 | 2020-10-27 | Boe Technology Group Co., Ltd. | Fingerprint recognition device, display substrate and display apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10949041B2 (en) | Capacitance detection circuit, capacitance detection method, touch detection apparatus, and terminal device | |
| CN110069156B (en) | Capacitance detection device capable of eliminating mutual capacitance influence | |
| CN106155435B (en) | Highly sensitive capacitance touch-control device and its operation method | |
| CN106557724B (en) | Fingerprint sensing circuit and control method | |
| CN109643996A (en) | Capacitor is to voltage modulation circuit | |
| CN107924467B (en) | Fingerprint sensing system with finger detection | |
| US11592936B2 (en) | Capacitive touch device with high sensitivity and low power consumption | |
| CN102566911A (en) | Unlocking device and method for mobile terminal equipment | |
| CN113316759B (en) | Capacitance detection circuit, touch chip and electronic equipment | |
| CN103365507B (en) | Sensing device and method for improving reliability of capacitive touch device | |
| CN203981571U (en) | A kind of infrared gas sensor signal processing circuit | |
| CN108418973A (en) | Fall detection method and relevant apparatus | |
| CN109144305B (en) | High-sensitivity capacitive touch device and operation method thereof | |
| US10678374B2 (en) | Electrical device, receiving circuit, and method for touch sensing | |
| CN104360769B (en) | A kind of contact panel anti-disturbance method, contact panel and display | |
| Aezinia et al. | Touchless capacitive sensor for hand gesture detection | |
| CN204808353U (en) | Fingerprint detector and electronic equipment | |
| CN106295465A (en) | A kind of fingerprint detector and electronic equipment | |
| CN104811145B (en) | amplifying circuit and touch sensing system | |
| CN212592151U (en) | Electrocardio detecting system, living body fingerprint identification device and intelligent door lock | |
| WO2017087021A1 (en) | Delta modulator receive channel for capacitance measurement circuits | |
| CN105867787A (en) | Method and device for detecting mode of holding terminal by user and terminal | |
| CN203069680U (en) | Electromagnetic wave detection device | |
| CN202815736U (en) | Optical device and terminal device | |
| CN204808354U (en) | Fingerprint detector and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |