CN107026640A - The capacitance touching control sensing device controlled with logic circuit - Google Patents
The capacitance touching control sensing device controlled with logic circuit Download PDFInfo
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- CN107026640A CN107026640A CN201610070479.5A CN201610070479A CN107026640A CN 107026640 A CN107026640 A CN 107026640A CN 201610070479 A CN201610070479 A CN 201610070479A CN 107026640 A CN107026640 A CN 107026640A
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- 238000005259 measurement Methods 0.000 claims abstract description 26
- 238000000605 extraction Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000006698 induction Effects 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electronic Switches (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The present invention relates to a kind of capacitance touching control sensing device of utilization logic circuit control, including the cover plate provided with some key areas, capacitive sensing layer, line layer, touch key circuit are sequentially laminated with key zone；The touch key circuit contains capacitance measurement circuit, logic control circuit；Ground wire, the corresponding signal wire of the ground wire and signal wire that the electric capacity of the capacitive sensing layer is drawn respectively with line layer are connected, the corresponding signal wire of line layer and tag line arranged side by side are connected with the chip TCH of capacitance measurement circuit input pin, the chip TCH of capacitance measurement circuit signal output pin, tag line output pin is connected with signal output pin, the tag line input pin of the logic module chip of logic control circuit, and the signal output pin of the logic module chip of logic control circuit is connected with the center processor of line layer.Advantages of the present invention：By the sense state of logic circuit process signal line and its tag line, carry out the sense state of filter false, thus can increase contact density.
Description
Technical field
The present invention relates to a kind of touch technology, the capacitance touching control sensing device controlled more particularly, to a kind of utilization logic circuit.
Background technology
Capacitance touching control induced key has obtained increasingly being widely applied as one kind of touch-control sensing device.At present, two problems are triggered in the common making of capacitance touching control induced key and use, one is mistake sensing that larger parasitic capacitance between signal wire is produced, in order to avoid it is such the problem of usually require to adjust the sensitivity of capacitive sensing and limit the cabling mode of connecting line, such method effect is not often highly desirable；Another question is exactly the false touch in non-targeted touch-control sensing region, and in order to avoid false touch then needs to limit the minimum spacing between different touch control induction key-press, but such way also limit the number of contact in certain area.The two problems have had a strong impact on the application prospect of technology.So must try to eliminate parasitic capacitance, stray capacitance, the influence of secondary lobe electric capacity.
The content of the invention
The purpose of the present invention is that a kind of capacitance touching control sensing device of utilization logic circuit control simple in construction, being prevented effectively from false triggering is provided for prior art weak point.
The purpose of the present invention is realized by following measures：A kind of capacitance touching control sensing device of utilization logic circuit control, including the cover plate provided with some key areas, capacitive sensing layer, line layer are sequentially laminated with key zone, the capacitive sensing layer is made up of upper conductive ink layer, intermediate insulating layer, lower conductive ink layer, the line layer contains power supply, ground wire, center processor, characterized in that, being additionally provided with touch key circuit；The touch key circuit contains capacitance measurement circuit, logic control circuit；Ground wire and signal wire are drawn respectively in the electric capacity two ends of the capacitive sensing layer, the ground wire is that starting point is outwards coiled at key zone Nei Yi centers with signal wire, until being full of behind key zone respectively from the diagonal extraction of key zone, tag line of the line layer in corresponding non-key zone provided with corresponding signal wire and with the equal electric capacity of signal wire arranged in parallel, the ground wire of the ground wire and signal wire that the electric capacity of the capacitive sensing layer is drawn respectively with line layer, corresponding signal wire connection, the corresponding signal wire of line layer, and tag line arranged side by side is connected with the chip TCH of capacitance measurement circuit input pin, the chip TCH of capacitance measurement circuit signal output pin, the signal output pin of the chip of tag line output pin and logic control circuit, tag line input pin is connected, the signal output pin of the chip of logic control circuit is connected with the center processor of line layer.
The chip of the capacitance measurement circuit is TCH601.
The chip is that detection measurement reference capacitance C, measurement reference capacitance C capacitance is connected between TCH601 pin C AP IN and pin C AP OUT is 400 ~ 4000 times of corresponding capacitive sensing layer capacitance,
The logic module chip of the logic control circuit includes non-and door and NOT gate logic gates.
Compared with prior art, the capacitance touching control sensing device of utilization logic circuit control proposed by the present invention is employed, is had the following advantages that：1）It is that, respectively from the diagonal extraction of key zone, can so increase the capacitance sensitivity of induction zone after starting point is outwards coiled at key zone Nei Yi centers to draw ground wire and signal wire respectively from electric capacity two ends；2）It can accurately judge that the state in touch-control sensing area avoids causing false touch because induction zone capacitance measurement system changes excessively sensitivity for inductance capacitance by the tag line of setting, substantially increase the accuracy of sensing；3）By the sense state of logic circuit process signal line and its tag line, so that the sense state of filter false.Thus, contact density can be increased as much as possible using the present invention, the present invention achieves breakthrough progress.
Brief description of the drawings
Fig. 1 is one embodiment overall structure diagram proposed by the present invention.
Fig. 2 is the schematic diagram that Fig. 1 embodiments ground wire, signal wire are outwards coiled using center as starting point.
Fig. 3 is Fig. 1 embodiments capacitance measurement circuit and logic control circuit block diagram.
Fig. 4 is Fig. 1 embodiment logic control circuit schematic diagrams.
Embodiment
Embodiment is elaborated below in conjunction with the accompanying drawings：Fig. 1 ~ Fig. 4 shows one embodiment of the present of invention.In figure, a kind of capacitance touching control sensing device of utilization logic circuit control, including the cover plate 1 provided with some key areas, capacitive sensing layer 2, line layer 3 are sequentially laminated with key zone, the capacitive sensing layer 2 is made up of upper conductive ink layer 21, intermediate insulating layer 22, lower conductive ink layer 23, the line layer 3 contains power supply, ground wire, center processor, in addition, being additionally provided with touch key circuit；The touch key circuit contains capacitance measurement circuit 4, logic control circuit 5.Ground wire and signal wire are drawn in the electric capacity two ends of capacitive sensing layer respectively, the ground wire 8 be at key zone Nei Yi centers with signal wire 7 starting point mutually across a certain distance outwards coiling, until being full of behind key zone respectively from the diagonal extraction of key zone, as shown in Figure 2.Such arrangement increases induction zone electric capacity length, adds the capacitance sensitivity of induction zone.
The line layer in corresponding non-key zone provided with corresponding signal wire and tag line with the equal electric capacity of signal wire arranged in parallel, the ground wire and signal wire that the electric capacity of the capacitive sensing layer is drawn ground wire respectively with line layer, the connection of corresponding signal wire.Because the tag line and signal wire of setting have identical capacitance, it is in non-key zone and signal wire arranged in parallel, when signal wire is influenceed by parasitic capacitance, stray capacitance, secondary lobe electric capacity, it can equally be reflected on tag line, this establishes possibility to eliminate these influences, also eliminates the corresponding possibility for producing false touch.
Line layer corresponding signal wire Button and tag line Identify arranged side by side are connected with the chip TCH of capacitance measurement circuit 4 input pin, the chip TCH of capacitance measurement circuit 4 signal output pin, tag line output pin is connected with signal input tube pin, the tag line input pin of the logic module chip of logic control circuit 5, the signal output pin of the logic module chip of logic control circuit 5 is connected with the center processor of line layer, as shown in Figure 3.The present invention is applicable not only to single contact, is applied equally to multiconductor.Now illustrated by taking 6 key zones as an example, capacitance measurement circuit has used 2 pieces of TCH601 chips in the design.The signal wire that first key zone is picked out is Button1, tag line arranged side by side is Identify1, the corresponding input connection pin of TCH601 chips is divided into KEY0, KEY1, the corresponding output connection pin of TCH601 chips is divided into OUT0, OUT1, the corresponding input pin of logic module chip is SI0, ID0, the corresponding output pin of logic module chip is OUT0, the signal of output pin OUT0 outputs connects with center processor, or is directly output to performer.Detection measurement reference capacitance is connected between the input pin CAPIN and CAPOUT of TCH601 chips, the sensitivity according to needed for actual circuit of its capacitance is adjusted, it is corresponding sense layer capacitance 400 ~ 4000 times, the more big then sensitivity of institute's power taking capacitance is lower under normal circumstances, and more sluggishness is higher.One TCH601 chip can receive the signal that three key zones are provided, and 1 logic module chip can receive the signal that six press keys area is provided.TCH chips have Multiple Type specification, can be according to the corresponding specification of how much selections of key zone.
Fig. 4 is logic control circuit schematic diagram, is still illustrated with 6 key zones.The chip of the logic control circuit includes non-and door 10 and the logic gates of NOT gate 9.The signal of the signal induction line exported by capacitance measurement circuit is directly entered non-and door, and the signal of the corresponding tag line of capacitance measurement circuit output first enters NOT gate and accesses non-and door again, and center processor or performer are outputed signal to by non-and door.
The present invention so works：When touch key circuit works, if touch key-press area 1, the weak current of signal wire Button1 outputs is delivered to the pin KEY0 of the chip TCH601 chips of capacitance measurement circuit, its output pin OUT0 can export a low level when TCH601 chips have detected electric current, now, if corresponding tag line is not disturbed by the external world, its output pin OUT1 can export a high level when TCH601 chips have not detected electric current, the low level of correspondence OUT0 outputs and the high level of OUT1 outputs, logic control circuit exports high level, i.e., effective data signal.If now, corresponding tag line is disturbed by the external world, and its output pin OUT1 can export a low level, the low level of correspondence OUT0 outputs and the low level of OUT1 outputs when TCH601 chips have detected electric current, logic control circuit exports low level, filters out error signal.
Embodiments of the present invention are described above in conjunction with accompanying drawing, the structure that embodiment is provided is not construed as limiting the invention, those skilled in the art in the art make various deformations or amendments in protection domain within the scope of the appended claims.
Claims (4)
1. a kind of capacitance touching control sensing device of utilization logic circuit control, including the cover plate provided with some key areas, capacitive sensing layer, line layer are sequentially laminated with key zone, the capacitive sensing layer is made up of upper conductive ink layer, intermediate insulating layer, lower conductive ink layer, the line layer contains power supply, ground wire, center processor, characterized in that, being additionally provided with touch key circuit；The touch key circuit contains capacitance measurement circuit, logic control circuit；The capacitance measurement circuit TCH containing chip, logic control circuit chip containing logic module, ground wire and signal wire are drawn respectively in the electric capacity two ends of the capacitive sensing layer, the ground wire is starting point mutually outwards coiling across a certain distance at key zone Nei Yi centers with signal wire, until being full of behind key zone respectively from the diagonal extraction of key zone, tag line of the line layer in corresponding non-key zone provided with corresponding signal wire and with the equal electric capacity of signal wire arranged in parallel, the ground wire of the ground wire and signal wire that the electric capacity of the capacitive sensing layer is drawn respectively with line layer, corresponding signal wire connection, the corresponding signal wire of line layer, and tag line arranged side by side is connected with the chip TCH of capacitance measurement circuit input pin, the chip TCH of capacitance measurement circuit signal output pin, the signal output pin of the logic module chip of tag line output pin and logic control circuit, tag line input pin is connected, the signal output pin of the logic module chip of logic control circuit is connected with the center processor of line layer.
2. the capacitance touching control sensing device of utilization logic circuit control according to claim 1, it is characterised in that the chip of the capacitance measurement circuit is TCH601.
3. the capacitance touching control sensing device of utilization logic circuit control according to claim 2, it is characterized in that, the chip is that detection measurement reference capacitance C, measurement reference capacitance C capacitance is connected between TCH601 pin C AP IN and pin C AP OUT is 400 ~ 4000 times of corresponding capacitive sensing layer capacitance.
4. the capacitance touching control sensing device of utilization logic circuit control according to claim 1, it is characterised in that the logic module chip of the logic control circuit includes non-and door and NOT gate logic gates.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610070479.5A CN107026640A (en) | 2016-02-01 | 2016-02-01 | The capacitance touching control sensing device controlled with logic circuit |
| PCT/CN2016/000106 WO2017132781A1 (en) | 2016-02-01 | 2016-03-04 | Capacitive touch control sensing device controlled using logic circuit |
| GB1701580.1A GB2549364A (en) | 2016-02-01 | 2017-01-31 | Touch sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610070479.5A CN107026640A (en) | 2016-02-01 | 2016-02-01 | The capacitance touching control sensing device controlled with logic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107026640A true CN107026640A (en) | 2017-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610070479.5A Withdrawn CN107026640A (en) | 2016-02-01 | 2016-02-01 | The capacitance touching control sensing device controlled with logic circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107026640A (en) |
| WO (1) | WO2017132781A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108614210B (en) * | 2018-07-24 | 2024-04-16 | 浙江新涛电子科技有限公司 | Testing device for capacitive touch keys |
| CN112040592B (en) * | 2020-10-14 | 2023-12-12 | 广东新晨汽车科技股份有限公司 | Touch-sensitive LED lamp control circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540058A (en) * | 2011-12-31 | 2012-07-04 | 杭州士兰微电子股份有限公司 | Device for testing plasma scanning driver ic |
| CN102782626A (en) * | 2010-04-30 | 2012-11-14 | 密克罗奇普技术公司 | Capacitive touch system using both self and mutual capacitance |
| CN203057104U (en) * | 2012-12-18 | 2013-07-10 | 深圳市伦丰科技有限公司 | Bendable capacitive type touch control switch |
| US20140146002A1 (en) * | 2012-11-29 | 2014-05-29 | Focaltech Systems, Ltd. | Touch Detection System of Terminal Device and Terminal Device |
| US8823399B1 (en) * | 2013-10-07 | 2014-09-02 | Cypress Semiconductor Corporation | Detect and differentiate touches from different size conductive objects on a capacitive button |
| CN205377829U (en) * | 2016-02-01 | 2016-07-06 | 郑健青 | Capacitanc touch sensor spare of application logic circuit control |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201571037U (en) * | 2009-12-24 | 2010-09-01 | 深圳市汇顶科技有限公司 | Capacitive touch control structure, touch control module and touch control terminal |
| JP4585615B1 (en) * | 2010-02-03 | 2010-11-24 | 株式会社オーギャ | Input device |
| CN201898497U (en) * | 2010-11-10 | 2011-07-13 | 江苏惠通集团有限责任公司 | Conductive printing ink capacitor touch key |
-
2016
- 2016-02-01 CN CN201610070479.5A patent/CN107026640A/en not_active Withdrawn
- 2016-03-04 WO PCT/CN2016/000106 patent/WO2017132781A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782626A (en) * | 2010-04-30 | 2012-11-14 | 密克罗奇普技术公司 | Capacitive touch system using both self and mutual capacitance |
| CN102540058A (en) * | 2011-12-31 | 2012-07-04 | 杭州士兰微电子股份有限公司 | Device for testing plasma scanning driver ic |
| US20140146002A1 (en) * | 2012-11-29 | 2014-05-29 | Focaltech Systems, Ltd. | Touch Detection System of Terminal Device and Terminal Device |
| CN203057104U (en) * | 2012-12-18 | 2013-07-10 | 深圳市伦丰科技有限公司 | Bendable capacitive type touch control switch |
| US8823399B1 (en) * | 2013-10-07 | 2014-09-02 | Cypress Semiconductor Corporation | Detect and differentiate touches from different size conductive objects on a capacitive button |
| CN205377829U (en) * | 2016-02-01 | 2016-07-06 | 郑健青 | Capacitanc touch sensor spare of application logic circuit control |
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| Publication number | Publication date |
|---|---|
| WO2017132781A1 (en) | 2017-08-10 |
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Application publication date: 20170808 |
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| WW01 | Invention patent application withdrawn after publication |