CN104796129A - Capacitive touch key identification device with self-calibration function - Google Patents
Capacitive touch key identification device with self-calibration function Download PDFInfo
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- CN104796129A CN104796129A CN201510194626.5A CN201510194626A CN104796129A CN 104796129 A CN104796129 A CN 104796129A CN 201510194626 A CN201510194626 A CN 201510194626A CN 104796129 A CN104796129 A CN 104796129A
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- switch gate
- open door
- switch
- touch key
- charge
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Abstract
The invention discloses a capacitive touch key identification device with a self-calibration function. The capacitive touch key identification device comprises a first open door, a second open door, a third open door and a fourth open door, a PAD sensing disc is connected to a connecting line between the first open door and the second open door, a first charge collection capacitor is connected to the connection line between the second open door and the third open door, and a second charge collection capacitor is connected to the connection line between the third open door and the fourth open door. Interference resisting capability of a capacitive touch product is improved through cooperation of the first open door, the second open door, the third open door, the fourth open door, the first charge collection capacitor and the second charge collection capacitor, flexibility is improved, and the range of application is greatly developed.
Description
Technical field
Patent of the present invention belongs to capacitance type touch key recognition technology field, is specifically related to a kind of capacitance type touch key recognition device with self-calibration function.
Background technology
Along with the development of electronic product, touch-screen is more and more general, and current capacitance type touch key identification ubiquity insufficient sensitivity is high, the problems such as antijamming capability is poor.
Summary of the invention
In order to overcome above-mentioned existing technological deficiency, the object of the invention is: the capacitance type touch key recognition device that the band self-calibration function that a kind of structure is simple, antijamming capability is strong and highly sensitive is provided.
In order to achieve the above object, the present invention is achieved through the following technical solutions: the capacitance type touch key recognition device of band self-calibration function, comprise the first switch gate, second switch door, the 3rd switch gate and the 4th switch gate that connect successively, line between the first described switch gate and second switch door is connected with PAD inductive disks, line between described second switch door and the 3rd switch gate is connected with the first charge-trapping electric capacity, and the line between the 3rd described switch gate and the 4th switch gate is connected with the second charge-trapping electric capacity.
The first described switch gate, second switch door, the 3rd switch gate and the 4th switch gate are the COMS transistor comprising a NCOMS transistor and a PCOMS transistor.
The second described charge-trapping electric capacity is connected with the line between the 3rd switch gate and the 4th switch gate by a protective resistance.
The invention has the beneficial effects as follows: the capacitance type touch key recognition device of band self-calibration function of the present invention, use multiple repairing weld, the mode of stored charge, reaches the identification of minimum electric capacity, and use multi collect, conform to contrast, realizes the eliminating of interference.The antijamming capability and the high sensitivity that improve capacitance touch product make it to obtain very large enlargement in the scope of application.Decrease because disturbing the false triggering caused.
Accompanying drawing explanation
Fig. 1 is the structural representation of the capacitance type touch key recognition device of band self-calibration function of the present invention;
In figure, 1-first switch gate, 2-second switch door, 3-the 3rd switch gate, 4-the 4th switch gate, 5-first charge-trapping electric capacity, 6-second charge-trapping electric capacity, 7-protective resistance, 8-inductive disks.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, with the capacitance type touch key recognition device of self-calibration function, comprise the first switch gate 1, second switch door 2, the 3rd switch gate 3 and the 4th switch gate 4 that connect successively, line between the first described switch gate 1 and second switch door 2 is connected with PAD inductive disks 8, line between described second switch door 2 and the 3rd switch gate 3 is connected with the first charge-trapping electric capacity 5, and the line between the 3rd described switch gate 3 and the 4th switch gate 4 is connected with the second charge-trapping electric capacity 6.The capacitance type touch key recognition device of band self-calibration function of the present invention, by the cooperation of the first switch gate 1, second switch door 2, the 3rd switch gate 3, the 4th switch gate 4, first charge-trapping electric capacity 5 and the second charge-trapping electric capacity 6 etc., use multiple repairing weld, the mode of stored charge, reach the identification of minimum electric capacity, use multi collect, conform to contrast, realizes the eliminating of interference.Improve antijamming capability and the high sensitivity of capacitance touch product, make it to obtain very large enlargement in the scope of application.Decrease because disturbing the false triggering caused.During use, first switch gate 1 is opened, when second switch door 2 is closed, power supply starts to charge to inductive disks 8, close the first switch gate 1, open second switch door 2, close the 3rd switch gate 3, electric charge starts 8 to first charge-trapping electric capacity 5 from inductive disks to be shifted, and the capacitance of the first charge-trapping electric capacity 5 is much larger than the capacitance of inductive disks 8.By calculating number of times and the voltage of transferring to electric charge the first charge-trapping electric capacity 5 from inductive disks 8, to calculate actual capacitance value in inductive disks 8.Record capacitance by repeatedly actual, compare, to have judged whether that button is pressed with the chip capacitance recorded first that powers on, combined by the opening and closing of gate-controlled switch 3 and 4, electric capacity 5 is discharged, calculates the open and close number of times of 3 and 4, to reach the electric charge number calculating and collect.Record the deviation that opening and closing number of times repeatedly compares numerical value mutually, to judge whether to disturb the electric charge introduced, reach the effect improving antijamming capability.
As preferably, the first described switch gate 1, second switch door 2, the 3rd switch gate 3 and the 4th switch gate 4 are the COMS transistor comprising a NCOMS transistor and a PCOMS transistor.
As preferably, the second described charge-trapping electric capacity 6 is connected with the line between the 3rd switch gate 3 and the 4th switch gate 4 by a protective resistance 7.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. be with the capacitance type touch key recognition device of self-calibration function, it is characterized in that: comprise the first switch gate (1) connected successively, second switch door (2), 3rd switch gate (3) and the 4th switch gate (4), line between described the first switch gate (1) and second switch door (2) is connected with PAD inductive disks (8), line between described second switch door (2) and the 3rd switch gate (3) is connected with the first charge-trapping electric capacity (5), line between the 3rd described switch gate (3) and the 4th switch gate (4) is connected with the second charge-trapping electric capacity (6).
2. the capacitance type touch key recognition device of band self-calibration function according to claim 1, is characterized in that: described the first switch gate (1), second switch door (2), the 3rd switch gate (3) and the 4th switch gate (4) are the COMS transistor comprising a NCOMS transistor and a PCOMS transistor.
3. the capacitance type touch key recognition device of band self-calibration function according to claim 1 and 2, is characterized in that: the second described charge-trapping electric capacity (6) is connected with the line between the 3rd switch gate (3) and the 4th switch gate (4) by a protective resistance (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194626.5A CN104796129A (en) | 2015-04-17 | 2015-04-17 | Capacitive touch key identification device with self-calibration function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194626.5A CN104796129A (en) | 2015-04-17 | 2015-04-17 | Capacitive touch key identification device with self-calibration function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104796129A true CN104796129A (en) | 2015-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510194626.5A Pending CN104796129A (en) | 2015-04-17 | 2015-04-17 | Capacitive touch key identification device with self-calibration function |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1832349A (en) * | 2006-04-19 | 2006-09-13 | 北京希格玛晶华微电子有限公司 | Capacitor measuring touch sensing identifying method and implementing device |
| JP4363281B2 (en) * | 2004-09-08 | 2009-11-11 | オムロン株式会社 | Capacity measuring device and method, and program |
| CN101943716A (en) * | 2009-07-09 | 2011-01-12 | 联咏科技股份有限公司 | Capacitance measurement circuit and method |
| CN102043096A (en) * | 2009-10-15 | 2011-05-04 | 瑞鼎科技股份有限公司 | Capacitance measurement circuit and method |
| CN102594327A (en) * | 2011-01-14 | 2012-07-18 | 苏州路之遥科技股份有限公司 | Capacitive sensing key and key detection method |
| CN102759367A (en) * | 2011-04-29 | 2012-10-31 | 义隆电子股份有限公司 | Sensing circuit and method for differential capacitor |
| US8493131B2 (en) * | 2010-03-17 | 2013-07-23 | Focaltech Systems Ltd. | Capacitive touch panel detection circuit and boost circuit thereof |
-
2015
- 2015-04-17 CN CN201510194626.5A patent/CN104796129A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4363281B2 (en) * | 2004-09-08 | 2009-11-11 | オムロン株式会社 | Capacity measuring device and method, and program |
| CN1832349A (en) * | 2006-04-19 | 2006-09-13 | 北京希格玛晶华微电子有限公司 | Capacitor measuring touch sensing identifying method and implementing device |
| CN101943716A (en) * | 2009-07-09 | 2011-01-12 | 联咏科技股份有限公司 | Capacitance measurement circuit and method |
| CN102043096A (en) * | 2009-10-15 | 2011-05-04 | 瑞鼎科技股份有限公司 | Capacitance measurement circuit and method |
| US8493131B2 (en) * | 2010-03-17 | 2013-07-23 | Focaltech Systems Ltd. | Capacitive touch panel detection circuit and boost circuit thereof |
| CN102594327A (en) * | 2011-01-14 | 2012-07-18 | 苏州路之遥科技股份有限公司 | Capacitive sensing key and key detection method |
| CN102759367A (en) * | 2011-04-29 | 2012-10-31 | 义隆电子股份有限公司 | Sensing circuit and method for differential capacitor |
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Application publication date: 20150722 |
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