CN109213358A - Proximity sensor and detection method thereof - Google Patents
Proximity sensor and detection method thereof Download PDFInfo
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- CN109213358A CN109213358A CN201710769680.7A CN201710769680A CN109213358A CN 109213358 A CN109213358 A CN 109213358A CN 201710769680 A CN201710769680 A CN 201710769680A CN 109213358 A CN109213358 A CN 109213358A
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- 238000001514 detection method Methods 0.000 title claims abstract description 88
- 239000003990 capacitor Substances 0.000 claims description 49
- 230000005611 electricity Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims 3
- 101100352419 Pithecopus hypochondrialis psn1 gene Proteins 0.000 description 3
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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
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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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
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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Abstract
A proximity sensor and a detection method thereof. The proximity sensor includes a sensing electrode, a detection circuit, a plurality of traces, and an arithmetic logic circuit. The detection circuit is used for detecting the capacitance value of the sensing electrode. The plurality of tracks are coupled between the sensing electrodes and the sensing circuit. The operation logic circuit is coupled to the detection circuit, calculates capacitance value changes of the sensing electrode during a detection period to sequentially generate a plurality of capacitance change values, and provides a trigger report signal according to the capacitance change values, wherein each capacitance change value corresponds to one of the tracks.
Description
Technical field
The present invention is to be related to a kind of detection method, and more particularly to a kind of proximity sensor and its detection method.
Background technique
In recent years, the product using capacitance type sensing interface as man-machine input interface rapidly increases, and application range
Gradually become extensively, such as from mobile phone to computer, from point of service terminal machine to electrical home appliances, from medical device to industry
Control etc..With the promotion of the manipulation demand of user, capacitive sensing device provide touch-control sensing form from be applied to touching
Gradually evolution is to the devices such as neighbouring sensing (Proximity Sensing) are applied to for control screen and Trackpad, wherein most of touchings
Control object is all a part of human body, such as finger.
However, neighbouring sensing needs the analog-to-digital converter (Analog-to-Digital of high-res
Converter, ADC) or greater area of sensing electrode, it jointly needs to update whole circuit design, so that whole
Hardware cost can steeply rise.Therefore, hardware cost constantly reduce now it is required to which a kind of new circuit design is realized
Condenser type proximity sensor.
Summary of the invention
The present invention provides a kind of proximity sensor and its detection method, and neighbouring sense can be realized under existing circuit condition
It surveys, to reduce the whole hardware cost of proximity sensor.
Proximity sensor of the invention, including a sensing electrode, a detection circuit, multiple tracks and arithmetic logic electricity
Road.Capacitance of the detection circuit to detect sensing electrode.Multiple tracks are coupled between sensing electrode and sensing circuit.Operation
Logic circuits coupled detection circuit calculates the capacitance variation of sensing electrode, during a detection sequentially to generate multiple capacitors
Changing value, and a triggering report signal is provided according to these capacitance variations values, wherein each capacitance variations value corresponds to these rails
One of mark.
The detection method of proximity sensor of the invention, includes the following steps.A sensing electrode is coupled by multiple tracks
With a sensing circuit.The capacitance of sensing electrode is detected by sensing circuit.During a detection, pass through an arithmetic logic circuit
The capacitance variation for calculating sensing electrode, to be sequentially provided multiple capacitance variations values, wherein each capacitance variations value corresponds to these
One of track.A triggering report signal is provided by arithmetic logic circuit and according to these capacitance variations values.
Based on above-mentioned, the proximity sensor and its detection method of the embodiment of the present invention, detection circuit sequentially passes through different
Track is coupled to sensing electrode, and the circuit layout similar with current capacitive detector can be used in detection circuit, therefore can
By the software (namely firmware) in modification detection circuit, to realize the detection function of proximity sensor.As a result, using existing
Capacitive detector realize neighbouring sensing, to reduce the whole hardware cost of proximity sensor.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to cooperate attached drawing to make
Carefully it is described as follows.
Detailed description of the invention
Fig. 1 is the system schematic of the proximity sensor of an embodiment according to the present invention.
Fig. 2 to Fig. 3 is the running schematic diagram of the proximity sensor of an embodiment according to the present invention.
Fig. 4 is the system schematic of the proximity sensor of another embodiment according to the present invention.
Fig. 5 is the flow chart of the detection method of the proximity sensor of an embodiment according to the present invention.
Fig. 6 is the flow chart of the detection method of the proximity sensor of another embodiment according to the present invention.
Symbol description
Δ C1, Δ C2, Δ C3: capacitance variations value
100,200: proximity sensor
110: sensing electrode
120,220: integrated circuit
121,221: detection circuit
122_1~122_3,225: capacitance detector
123: arithmetic logic circuit
223: multiplexer
BL1~BL3: capacitor a reference value
C1~C3: capacitance
P1~P3: detection weld pad
Pint: during initialization
PSN1, PSN2: during detection
Rth: report critical value
STRx: triggering report signal
TA1~TA3: first end
TB: second end
Tdb: Key dithering number
TR1~TR3: track
Ture, false: logic level
Σ Cx: capacitor summation
S610~S640, S710~S780: step
Specific embodiment
Fig. 1 is the system schematic of the proximity sensor of an embodiment according to the present invention.Fig. 1 is please referred to, in the present embodiment
In, proximity sensor 100 includes sensing electrode 110, multiple tracks (herein by taking three track TR1~TR3 as an example), integrated circuit
120, integrated circuit 120 includes multiple detection weld pads (such as P1~P3), detection circuit 121 and arithmetic logic circuit 123.Wherein,
Track TR1~TR3 can be the track on printed circuit board, and track TR1~TR3 can not interlock each other.Wherein, track
TR1~TR3 can be designed to line impedance having the same, but i.e. track TR1~TR3 still has electrical spy different from each other
Property, such as equivalent capacity difference or the noise jamming difference being subject to.
Detection weld pad P1~P3 passes through track TR1~TR3 respectively and is coupled to sensing electrode 110, and 121 coupling of detection circuit
It is connected to detection weld pad P1~P3 and arithmetic logic circuit 123.Detection circuit 121 sequentially by detection weld pad P1~P3 and passes through rail
Mark TR1~TR3 is coupled to sensing electrode 110, sequentially to detect the capacitance of sensing electrode 110.For example, work as detection circuit
121 by detection weld pad P1 and when by track TR1 being coupled to sensing electrode 110, and capacitance C1 can be detected；Work as detection circuit
121 by detection weld pad P2 and when by track TR2 being coupled to sensing electrode 110, and capacitance C2 can be detected；Work as detection circuit
121 by detection weld pad P3 and when by track TR3 being coupled to sensing electrode 110, and capacitance C3 can be detected.
When arithmetic logic circuit receives capacitance C1~C3, the electricity of sensing electrode 110 can be calculated during a detection
Capacitance variation sequentially to generate multiple capacitance variations values, and provides triggering report according to above-mentioned calculated capacitance variations value
Signal STRx, wherein each capacitance variations value corresponds to one of track TR1~TR3, and triggering report signal STRx can
To be the analogue value or digital value.
When triggering report signal STRx is the analogue value, then back-end circuit (example can be supplied to by triggering report signal STRx
Such as control circuit), so that rear end and charge threshold level compare.Also, when the voltage quasi position of triggering report signal STRx is greater than electricity
When pressing critical value, then it can determine whether that user is to trigger corresponding manipulation function (such as setting display device, manipulation audio play
Device or controlling electric device product)；Conversely, will not then trigger corresponding manipulation function.
When triggering report signal STRx is digital value, then triggering report signal STRx (also can be logic for enable
Level " ture ") or forbidden energy (being also logic level " false ").When triggering report signal STRx is enable, then can trigger
Corresponding manipulation function；Conversely, can not then trigger corresponding manipulation function when triggering report signal STRx is forbidden energy.
In the present embodiment, detection circuit 121 includes multiple capacitance detectors (herein with three capacitance detector 122_1
For~122_3).Each capacitance detector 122_1~122_3 passes through one of track TR1~TR3 and detection weld pad P1
One of~P3 is coupled to sensing electrode 110, and capacitance detector 122_1~122_3 sequentially starts one by one to detect
The capacitance of sensing electrode 110, and then it is sequentially provided capacitance C1~3.
Furthermore, it is understood that capacitance detector 122_2 and 122_3 are then closed when capacitance detector 122_1 starting, and
Capacitance detector 122_1 can be coupled to sensing electrode 110 by detection weld pad P1 and by track TR1, to detect capacitance C1；
When capacitance detector 122_2 starting, capacitance detector 122_1 and 122_3 are then closed, and capacitance detector 122_2 passes through
It detects weld pad P2 and sensing electrode 110 is coupled to by track TR2, to detect capacitance C2；When capacitance detector 122_3 starts
When, capacitance detector 122_1 and 122_2 are then closed, and capacitance detector 122_3 by detection weld pad P3 and passes through track
TR3 is coupled to sensing electrode 110, to detect capacitance C3.
According to above-mentioned, integrated circuit 120 is similar with the circuit layout of current capacitive detector, passes through the increase of track
And the software (namely firmware) in modification integrated circuit 120, then integrated circuit 120 can realize the detection function of proximity sensor 100
Energy.It can realize neighbouring sensing, using the integrated circuit of existing capacitive detector as a result, to reduce the whole of proximity sensor
Body hardware cost.
In the present embodiment, the detection weld pad that detection weld pad P1~P3 is shown as being immediately adjacent to one another, but in other embodiments, inspection
Surveying weld pad P1~P3 can be not adjacent detection weld pad.In other words, those of ordinary skill in the art can be according to circuit design
Demand, and use the detection weld pad of any position.
Fig. 2 to Fig. 3 is the running schematic diagram of the proximity sensor of an embodiment according to the present invention.Referring to figure 2., in this reality
It applies in example, during initialization in Pint, capacitance detector 122_1~122_3 can be enabled sequentially, and arithmetic logic circuit 123
Capacitance C1~C3 detected by capacitance detector 122_1~122_3 in circuit 121 can be will test as capacitor a reference value
BL1~BL3, wherein capacitor a reference value BL1~BL3 respectively corresponds track TR1~TR3.In addition, capacitance detector 122_1~
122_3 enabling sequence be to illustrate namely the enabling time of capacitance detector 122_1~122_3 each other not repeat.
It then, can be according to capacitor a reference value BL1~BL3 and capacitance C1~C3 during the test in (such as PSN1, PSN2)
Calculate capacitance variations value Δ C1, Δ C2 and Δ C3.For example, Δ C1=C1-BL1, Δ C2=C2-BL2, and Δ C3=
Difference between C3-BL3 namely capacitance C1~C3 and corresponding capacitor a reference value BL1~BL3 is as capacitance variations value Δ
C1, Δ C2 and Δ C3, but the embodiment of the present invention is not limited.For example, above-mentioned difference can be multiplied by a weighted value, this can foundation
Those of ordinary skill in the art and become.
Also, during single detection in (such as PSN1, PSN2), if capacitance variations value Δ C1, Δ C2 and Δ C3 are at least
One when being less than or equal to capacitor critical value Cth, then arithmetic logic circuit 123 will not using these capacitance variations value Δs C1,
Δ C2 and Δ C3 carry out operation namely capacitor summation may be set to null value herein, with " null " indicates；Conversely, working as capacitance variations
When value Δ C1, Δ C2 and Δ C3 are both greater than capacitor critical value Cth, these capacitance variations value Δs of 123 summation of arithmetic logic circuit C1,
For Δ C2 and Δ C3 to obtain capacitor summation Σ Cx, representative is not null value.
Then, no matter whether arithmetic logic circuit 123 sends out to obtain capacitor summation Σ Cx, all counter can be shaken (De-
Bounce movement), namely judge whether capacitor summation Σ Cx meets Key dithering condition.Referring to figure 3., in the present embodiment,
The anti-movement shaken includes: to compare capacitor summation Σ Cx and report critical value Rth；It is greater than report critical value in capacitor summation Σ Cx
It is counted when Rth to provide count value；Also, triggering report signal STRx is set according to count value.
Furthermore, it is understood that (include the case where " null ") when capacitor summation Σ Cx is less than or equal to report critical value Rth, weight
Set count value；When capacitor summation Σ Cx is greater than report critical value Rth, count value adds one.Then, when count value is greater than Key dithering
When number Tdb, (voltage for being set as logic level " ture " or corresponding capacitor summation Σ Cx is quasi- by enable triggering report signal STRx
Position)；When count value is less than or equal to Key dithering number Tdb, forbidden energy triggering report signal STRx (is set as logic level
" false " or common voltage).For example, Key dithering number Tdb is assumed to be 2, then when count value is less than or equal to 2, forbidden energy triggering report
Signal STRx is accused, when count value is greater than 3, enable triggers report signal STRx.
Fig. 4 is the system schematic of the proximity sensor of another embodiment according to the present invention.Fig. 1 and Fig. 4 is please referred to, it is neighbouring
Sensor 200 is approximately identical to proximity sensor 100, the difference is that the detection circuit 221 in integrated circuit 220,
In the same or similar element use the same or similar label.In the present embodiment, detection circuit 221 includes multiplexer
223 and capacitance detector 225, and multiplexer 223 includes that multiple first ends (are herein with three first end TA1~TA3
Example) and a second end TB.
First end TA1~TA3 of multiplexer 223 is respectively coupled to detection weld pad P1~P3, to pass through detection weld pad
P1~P3 is respectively coupled to track TR1~TR3, and the second end TB of multiplexer 223 is coupled to capacitance detector 225.
In the present embodiment, second end TB can sequentially couple these first ends TA1~TA3, so that capacitance detector 225 sequentially passes through rail
Mark TR1~TR3 is coupled to sensing electrode 110 namely multiplexer 223 and couples second end TB to first end TA1~TA3 one by one
One of, and capacitance detector 225 can sequentially output capacitance value C1~C3 to arithmetic logic circuit 123.
Fig. 5 is the flow chart of the detection method of the proximity sensor of an embodiment according to the present invention.Referring to figure 5., at this
In embodiment, the detection method of proximity sensor includes the following steps.In step S610, it can be coupled and be sensed by multiple tracks
Electrode and sensing circuit.Then, in step S620, the capacitance of sensing electrode is detected by sensing circuit.Also, in step
In S630, during detection, by the capacitance variation of arithmetic logic circuit counting sensing electrode, to be sequentially provided multiple capacitors
Changing value, wherein each capacitance variations value corresponds to one of these tracks.Finally, being patrolled in step S640 by operation
It collects circuit and provides triggering report signal according to these capacitance variations values.
Fig. 6 is the flow chart of the detection method of the proximity sensor of another embodiment according to the present invention.Fig. 6 is please referred to,
In the present embodiment, the detection method of proximity sensor includes the following steps.In step S710, it can be coupled and be felt by multiple tracks
Survey electrode and sensing circuit.Then, in step S720, during initialization, circuit institute will test by arithmetic logic circuit
The multiple capacitances detected correspond to one of these tracks as multiple capacitor a reference values, each capacitor a reference value.And
And in step S730, during detection, it will test during detection by arithmetic logic circuit multiple detected by circuit
Multiple differences between capacitance and corresponding capacitor a reference value are as multiple capacitance variations values.
Then, in step S740, these capacitance variations values can be compared by arithmetic logic circuit and are faced with corresponding capacitor
Dividing value.When these capacitance variations values are not both greater than corresponding capacitor critical values namely the judging result of step S740 is
"No" thens follow the steps S750；When these capacitance variations values are both greater than corresponding capacitor critical value namely step S740 sentences
Disconnected result is "Yes", thens follow the steps S760.In step S750, meeting forbidden energy triggers report signal, and is subsequently returning to step
S730.It, can be by arithmetic logic circuit summation these capacitance variations values to obtain capacitor summation in step S760.
Then, in step S770, judge whether capacitor summation meets anti-jitter conditions.When capacitor summation is not met instead
When jitter conditions namely the judging result of step S770 is "No", thens follow the steps S750；When capacitor summation meets anti-shake item
When part namely the judging result of step S770 is "Yes", thens follow the steps S780.In step S780, arithmetic logic can be passed through
Circuit enable triggers report signal.
In the flow chart of Fig. 5 and Fig. 6, step S610~S640, S710~S780 sequence be to illustrate, the present invention
Embodiment is not limited.Also, the details of step S610~S640, S710~S780 can refer to the embodiment institute of Fig. 1 to Fig. 4
It states.It will not be described in detail here.
In conclusion the proximity sensor and its detection method of the embodiment of the present invention, detection circuit sequentially pass through different
Track is coupled to sensing electrode, and the circuit layout similar with current capacitive detector can be used in detection circuit, therefore can
By the software (namely firmware) in modification detection circuit, to realize the detection function of proximity sensor.As a result, using existing
Capacitive detector realize neighbouring sensing, to reduce the whole hardware cost of proximity sensor.
Although the present invention is disclosed as above with embodiment, it is not intended to limit the invention, any affiliated technology neck
Those of ordinary skill in domain, without departing from the spirit and scope of the present invention, should can make a little change with
Retouching, therefore protection scope of the present invention is subject to be defined depending on appended claims.
Claims (16)
1. a kind of proximity sensor characterized by comprising
Sensing electrode；
Detection circuit, to detect the capacitance of the sensing electrode；
Multiple tracks are coupled between the sensing electrode and the sensing circuit；And
Arithmetic logic circuit, couples the detection circuit, and the capacitance variation of the sensing electrode is calculated during detection, with according to
Sequence generates multiple capacitance variations values, and provides triggering report signal according to the multiple capacitance variations value, wherein each described
Capacitance variations value corresponds to one of the multiple track.
2. proximity sensor as described in claim 1, wherein the detection circuit includes multiple capacitance detectors, it is each described
Capacitance detector is coupled to the sensing electrode by one of the multiple track, and the capacitance detector is sequentially
Detect and provide the capacitance of the sensing electrode.
3. proximity sensor as claimed in claim 2, wherein the capacitance detector starts one by one.
4. proximity sensor as described in claim 1, wherein the detection circuit includes:
Multiplexer has the multiple first ends and second end for coupling the track, wherein the second end sequentially couples institute
State multiple first ends；And
Capacitance detector couples the second end, to provide the capacitance of the sensing electrode.
5. proximity sensor as claimed in claim 4, wherein the multiplexer couples the second end to described one by one
One of multiple first ends.
6. proximity sensor as described in claim 1 further includes having the detection circuit and the arithmetic logic circuit
In integrated circuit, and the detection circuit is coupled to the multiple track by multiple detection weld pads of the integrated circuit.
7. proximity sensor as claimed in claim 6, wherein the multiple detection weld pad is adjacent detection weld pad.
8. proximity sensor as described in claim 1, wherein the arithmetic logic circuit is during initialization by the detection
Multiple capacitances detected by circuit are as multiple capacitor a reference values, and by the detection circuit institute during the detection
Multiple differences between the multiple capacitances detected and corresponding capacitor a reference value as the multiple capacitance variations value, wherein
Each capacitor a reference value corresponds to one of the multiple track.
9. proximity sensor as claimed in claim 8, wherein facing when the multiple capacitance variations value is both greater than corresponding capacitor
When dividing value, the multiple capacitance variations value of arithmetic logic circuit summation is to obtain capacitor summation, the capacitor summation
With report critical value, counted when the capacitor summation is greater than the report critical value to provide count value, and foundation
The count value sets the triggering report signal.
10. proximity sensor as claimed in claim 9, wherein when the count value is greater than Key dithering number, described in enable
Report signal is triggered, when the count value is less than or equal to the Key dithering number, triggers report signal described in forbidden energy.
11. proximity sensor as claimed in claim 9, wherein when the capacitor summation is greater than the report critical value, institute
It states count value and adds one, when the capacitor summation is less than or equal to the report critical value, reset the count value.
12. a kind of detection method of proximity sensor characterized by comprising
Sensing electrode and sensing circuit are coupled to by multiple tracks；
The capacitance of the sensing electrode is detected by the sensing circuit；
During detection, by the capacitance variation of sensing electrode described in arithmetic logic circuit counting, to be sequentially provided multiple electricity
Hold changing value, wherein each capacitance variations value corresponds to one of the multiple track；And
Triggering report signal is provided by the arithmetic logic circuit and according to the multiple capacitance variations value.
13. the detection method of proximity sensor as claimed in claim 12, wherein being sequentially provided the multiple capacitance variations value
The step of include:
Multiple capacitances detected by the detection circuit are made during the initialization by the arithmetic logic circuit
For multiple capacitor a reference values；And
By the arithmetic logic circuit during the detection by multiple capacitances detected by the detection circuit with it is right
The multiple differences between capacitor a reference value answered are as the multiple capacitance variations value, wherein each capacitor a reference value is corresponding
One of the multiple track.
14. the detection method of proximity sensor as claimed in claim 13, wherein being provided according to the multiple capacitance variations value
The step of triggering report signal includes:
Pass through more the multiple capacitance variations value of the arithmetic logic circuit and corresponding capacitor critical value；
When the multiple capacitance variations value is both greater than corresponding capacitor critical value, by described in the arithmetic logic circuit summation
Multiple capacitance variations values are to obtain a capacitor summation；
Pass through the arithmetic logic circuit capacitor summation and report critical value；
It is counted when the capacitor summation is greater than the report critical value to provide count value；And
The triggering report signal is set by the arithmetic logic circuit and according to the count value.
15. the detection method of proximity sensor as claimed in claim 14, wherein setting the triggering according to the count value
The step of report signal includes:
When the count value is greater than Key dithering number, report signal is triggered described in enable；And
When the count value is less than or equal to the Key dithering number, report signal is triggered described in forbidden energy.
16. the detection method of proximity sensor as claimed in claim 14, wherein being more than or equal in the capacitor summation described
The step of being counted to provide the count value, includes: when reporting critical value
When the capacitor summation is greater than the report critical value, the count value adds one；And
When the capacitor summation is less than or equal to the report critical value, the count value is reset.
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| TW106122037A TWI631822B (en) | 2017-06-30 | 2017-06-30 | Proximity sensor and detection method thereof |
| TW106122037 | 2017-06-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789343A (en) * | 2011-05-16 | 2012-11-21 | 原相科技股份有限公司 | Noise blanking for capacitive touch displays |
| US20120306802A1 (en) * | 2011-06-06 | 2012-12-06 | Mccracken David Harold | Differential capacitance touch sensor |
| US20130257786A1 (en) * | 2012-03-30 | 2013-10-03 | Sharp Kabushiki Kaisha | Projected capacitance touch panel with reference and guard electrode |
| TWM533773U (en) * | 2016-04-18 | 2016-12-11 | Superc Touch Coporation | Mutual capacitance integral sensing apparatus for touch and force sensing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8902173B2 (en) * | 2006-09-29 | 2014-12-02 | Cypress Semiconductor Corporation | Pointing device using capacitance sensor |
| TWM539657U (en) * | 2017-01-04 | 2017-04-11 | 奕力科技股份有限公司 | Touch apparatus |
-
2017
- 2017-06-30 TW TW106122037A patent/TWI631822B/en active
- 2017-08-31 CN CN201710769680.7A patent/CN109213358B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789343A (en) * | 2011-05-16 | 2012-11-21 | 原相科技股份有限公司 | Noise blanking for capacitive touch displays |
| US20120306802A1 (en) * | 2011-06-06 | 2012-12-06 | Mccracken David Harold | Differential capacitance touch sensor |
| US20130257786A1 (en) * | 2012-03-30 | 2013-10-03 | Sharp Kabushiki Kaisha | Projected capacitance touch panel with reference and guard electrode |
| TWM533773U (en) * | 2016-04-18 | 2016-12-11 | Superc Touch Coporation | Mutual capacitance integral sensing apparatus for touch and force sensing |
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| TWI631822B (en) | 2018-08-01 |
| TW201906320A (en) | 2019-02-01 |
| CN109213358B (en) | 2021-11-02 |
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