CN201741130U - Misoperation preventing device for optical touch screen and optical touch screen - Google Patents
Misoperation preventing device for optical touch screen and optical touch screen Download PDFInfo
- Publication number
- CN201741130U CN201741130U CN2009202229359U CN200920222935U CN201741130U CN 201741130 U CN201741130 U CN 201741130U CN 2009202229359 U CN2009202229359 U CN 2009202229359U CN 200920222935 U CN200920222935 U CN 200920222935U CN 201741130 U CN201741130 U CN 201741130U
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- touch screen
- optical touch
- sensor
- circuit
- wave filter
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Abstract
The utility model discloses a misoperation preventing device for an optical touch screen and a touch screen. The device comprises a sensor and a signal processing unit; the signal output end of the sensor is connected with the input end of the signal processing unit; the signal processing unit comprises an amplifying circuit, a wave filter, an absolute value converting circuit, a peak envelope detection circuit, a comparator and a microprocessor; and the amplifying circuit, the wave filter, the absolute value converting circuit, the peak envelope detection circuit, the comparator and the microprocessor are connected in series sequentially. The misoperation preventing device for the optical touch screen can effectively shield mistaken touch operations, and the optical touch screen using the device inputs information more accurately.
Description
Technical field
The utility model belongs to field of photoelectric technology, is specifically related to a kind of anti-misoperation apparatus and a kind of touch-screen that is used for optical touch screen.
Background technology
Optical touch screen is as a kind of up-to-date computer input equipment, and it is simple, convenient, the most natural present a kind of man-machine interaction mode.It has given multimedia with brand-new looks, is extremely attractive brand-new multimedia interactive equipment.But in actual applications, existing optical touch screen is difficult to the shielding false touch and touches operation.Such as one drop on the winged insect on the touch panel, user's coat-sleeve whips touch panel etc., the false command that these maloperations produced can not be allowed at some special occasions, as aspects such as Industry Control, military affairs.
The utility model content
At problems of the prior art, the utility model provides a kind of can effectively shield the anti-misoperation apparatus that is used for optical touch screen that operation is touched in false touch, comprise sensor and signal processing unit, the signal output part of described sensor is connected with the input end of described signal processing unit.Wherein optical touch screen realizes touching the touch-screen of location for using imageing sensor.
According to an aspect of the present utility model, described sensor is a sonic sensor.
According to an aspect of the present utility model, described sonic sensor is a piezoelectric ceramic piece.
According to an aspect of the present utility model, described signal processing unit comprises amplifying circuit, wave filter, absolute value translation circuit, peak envelop detection circuit, comparer and microprocessor, and described amplifying circuit, wave filter, absolute value translation circuit, peak envelop detection circuit, comparer and microprocessor are sequentially connected togather.
According to an aspect of the present utility model, between described wave filter and described absolute value translation circuit, be in series with and be used to improve the automatic gain control circuit of peak detection accuracy and the control end of described automatic gain control circuit is connected with described microcontroller.
According to an aspect of the present utility model, described amplifying circuit is preposition differential amplifier circuit.
According to an aspect of the present utility model, described wave filter is multiple feedback-type bandpass filter.
According to an aspect of the present utility model, be in series with the potentiometer of the centre frequency that is used to regulate described wave filter between described wave filter and the described microprocessor.
According to an aspect of the present utility model, described potentiometer is a digital regulation resistance.
According to an aspect of the present utility model, described sensor is the mechanical force sensor.
According to an aspect of the present utility model, described mechanical force sensor is one of foil gauge, pressure transducer, pulling force sensor or combination.
The utility model also provides a kind of optical touch screen, comprises touch panel, anti-misoperation apparatus, and described anti-misoperation apparatus comprises sensor and signal processing unit, and the signal output part of described sensor is connected with the input end of described signal processing unit.Wherein optical touch screen realizes touching the touch-screen of location for using imageing sensor.
According to an aspect of the present utility model, described sensor is a sonic sensor.
According to an aspect of the present utility model, described sonic sensor is a piezoelectric ceramic piece.
According to an aspect of the present utility model, described touch panel leads sound by height and transparent material is made.
According to an aspect of the present utility model, described touch panel is a glass plate.
According to an aspect of the present utility model, described signal processing unit comprises amplifying circuit, wave filter, absolute value translation circuit, peak envelop detection circuit, comparer and microprocessor, and described amplifying circuit, wave filter, absolute value translation circuit, peak envelop detection circuit, comparer and microprocessor are sequentially connected togather.
According to an aspect of the present utility model, between described wave filter and described absolute value translation circuit, be in series with and be used to improve the automatic gain control circuit of peak detection accuracy and the control end of described automatic gain control circuit is connected with described microcontroller.
According to an aspect of the present utility model, described amplifying circuit is preposition differential amplifier circuit.
According to an aspect of the present utility model, described wave filter is multiple feedback-type bandpass filter.
According to an aspect of the present utility model, be in series with the potentiometer of the centre frequency that is used to regulate described wave filter between described wave filter and the described microprocessor.
According to an aspect of the present utility model, described potentiometer is a digital regulation resistance.
According to an aspect of the present utility model, described sensor is the mechanical force sensor.
According to an aspect of the present utility model, described mechanical force sensor is one of foil gauge, pressure transducer, pulling force sensor or combination.
Others of the present utility model and/or advantage part are in the following description described, and wherein part is conspicuous in this explanation, perhaps can be by learning in the practice of the present utility model.
Description of drawings
Fig. 1 is according to first embodiment of the present utility model, and the circuit diagram of annexation between each assembly that constitutes this anti-misoperation apparatus has been described;
Fig. 2 is the circuit structure diagram according to first kind of prioritization scheme of the utility model first embodiment;
Fig. 3 is the circuit structure diagram according to second kind of prioritization scheme of the utility model first embodiment;
Fig. 4 is the circuit structure diagram according to the third prioritization scheme of the utility model first embodiment;
Fig. 5 is according to second embodiment of the present utility model, brief description constitute the structural drawing of the Position Approximate relation between the features component of this optical touch screen; And
Fig. 6 is according to the 3rd embodiment of the present utility model, brief description constitute the structural drawing of the Position Approximate relation between the features component of this optical touch screen.
Embodiment
The utility model will be further described below in conjunction with specification drawings and specific embodiments.
To begin the detailed description of embodiment of the present utility model below, according to corresponding description of drawings embodiment, wherein identical in the whole text Reference numeral refers to components identical.Below will by with reference to description of drawings embodiment to explain the utility model.
Although known part or element are important to the utility model, will not illustrate or brief description below, as the annexation between the internal structural components of touch-screen etc., only at length feature structure of the present utility model is described.
Accompanying drawing 1 is according to first embodiment of the present utility model, and the circuit diagram of annexation between each assembly that constitutes this anti-misoperation apparatus has been described.
With reference to accompanying drawing 1, this anti-misoperation apparatus that is used for optical touch screen comprises sensor 101 and signal processing unit 102, and the signal output part of sensor 101 is connected with the input end of signal processing unit 102.Sensor 101 in the present embodiment is a sonic sensor.Signal processing unit 102 comprises amplifying circuit 1021, wave filter 1022, absolute value translation circuit 1023, peak envelop detection circuit 1024, comparer 1025 and microprocessor 1026, and amplifying circuit 1021, wave filter 1022, absolute value translation circuit 1023, peak envelop detection circuit 1024, comparer 1025 and microprocessor 1026 are sequentially connected togather.This anti-misoperation apparatus that is used for optical touch screen is used to shield invalid touch operation (as dropping on the coat-sleeve of winged insect, fallen leaves, touch-screen user on the touch panel of touch-screen etc.), only allow effective touch operation (the touch-screen user to the touch panel of touch-screen have a mind to knock).Touch objects just is equivalent to a sound generation source when on the touch panel of optical touch screen striking taking place, the acoustic signals that sound generation source produced is received by sonic sensor after amplifying circuit 1021 amplifications are transferred in the wave filter 1022.Because the centre frequency of the acoustic signals that invalid touch operation produced is generally about 50hz, the centre frequency of the acoustic signals that effective touch operation is produced is on one side about 1khz, so only need the centre frequency of wave filter 1022 is set in about 1khz the acoustic signals that just can the most invalid touch operation of filtering be produced; Acoustic signals after wave filter 1022 filters is transferred in the comparer 1025 after the processing of absolute value transform circuit 1023 and peak envelop detection circuit 1024 and compares with default amplitude.When being lower than default amplitude as the peak value of this acoustic signals, the touch operation that then produces this acoustic signals can be regarded as invalid touch operation.When being greater than or equal to default amplitude as the peak value of this acoustic signals, the touch operation that then produces this acoustic signals can be regarded as effective touch operation.Microprocessor 1026 can send the position that instruction detects this effective touch operation to the detection system of touch-screen then.In actual applications, preferred, sonic sensor 101 can be piezoelectric ceramic piece; Amplifying circuit 1021 can be pre-amplification circuit, and pre-amplification circuit can be constituted or be built by common amplifier and constitute by instrument amplifier; Wave filter 1022 can be multiple feedback-type bandpass filter.This anti-misoperation apparatus that is used for optical touch screen can the invalid touch operation of high-efficiency shielding, improves the accuracy rate of optical touch screen input information greatly.
When the sensor of the anti-misoperation apparatus that is used for optical touch screen was the mechanical force sensor, the mechanical force sensor can be one of foil gauge, pressure transducer, pulling force sensor or combination.Different with sonic sensor, the mechanical force sensor is exported induced signal by the moment of flexure of doing the time spent generation that is subjected to touch force of senses touch panel.Control the deformation size that touch panel took place that it can be experienced by the parameter of setting the mechanical force sensor, and then the size of touch force is limited.For example, when the mechanical force sensor is foil gauge, can limit the moment of flexure that to experience touch panel by the sensitivity coefficient that changes foil gauge.As not detecting the moment of flexure of touch panel, then be considered as invalid touch operation.As detected the moment of flexure of touch panel, and then being considered as effective touch operation, microprocessor can send the position that instruction detects this effective touch operation to the detection system of touch-screen then.
Fig. 2 is the circuit structure diagram according to first kind of prioritization scheme of the utility model first embodiment.
With reference to Fig. 2, thisly be used for the anti-misoperation apparatus of optical touch screen and the difference of first embodiment is, between wave filter 1022 and absolute value translation circuit 1023, also be in series with the automatic gain control circuit (AGC) 201 that is used to improve the peak detection accuracy and the control end of this automatic gain control circuit (AGC) 201 and be connected with microcontroller 1026.201 pairs of acoustic signals after wave filter 1022 filters of automatic gain control circuit (AGC) carry out automatic gain, effectively eliminated peak value conversion because of the different acoustic signals that cause of distance between sound generation source and the sonic sensor 101 big, be unfavorable for the shortcoming that detects, guaranteed the accuracy of peak detection.
Fig. 3 is the circuit structure diagram according to second kind of prioritization scheme of the utility model first embodiment.
With reference to Fig. 3, thisly be used for the anti-misoperation apparatus of optical touch screen and the difference of first embodiment is, between wave filter 1022 and microprocessor 1026, be in series with potentiometer 301.This potentiometer 301 can be regulated the resistance of resistance in the wave filter 1022 under the control of microprocessor 1026, also just regulated the centre frequency of wave filter 1022.In actual applications, preferred, potentiometer 301 can be digital regulation resistance.The anti-misoperation apparatus that is used for optical touch screen of this structure can satisfy under different environment to be regulated detected parameters by host computer, and more flexible and changeable, accommodation is more wide.
Fig. 4 is that Fig. 3 is the circuit structure diagram according to the third prioritization scheme of the utility model first embodiment.
With reference to Fig. 4, this anti-misoperation apparatus that is used for optical touch screen combines the advantage of above-mentioned two kinds of prioritization schemes, between wave filter 1022 and absolute value translation circuit 1023, also be in series with the automatic gain control circuit (AGC) 201 that is used to improve the peak detection accuracy and the control end of this automatic gain control circuit (AGC) 201 and be connected, between wave filter 1022 and microprocessor 1026, be in series with potentiometer 301 with microcontroller 1026.The anti-misoperation apparatus that is used for optical touch screen of this structure both eliminated peak value conversion because of the different acoustic signals that cause of distance between sound generation source and the sonic sensor 101 big, be unfavorable for the shortcoming that detects, centre frequency that again can flexible wave filter 1022.Having can satisfy under different environment in the accuracy that has guaranteed peak detection and by host computer detected parameters is regulated, is a kind of prioritization scheme of the utility model optimum.
Accompanying drawing 5 is according to second embodiment of the present utility model, brief description constitute the structural drawing of the Position Approximate relation between the features component of this optical touch screen.
With reference to accompanying drawing 5, this optical touch screen comprises touch panel 501, anti-misoperation apparatus 502, framework 503 and imageing sensor 504, anti-misoperation apparatus 502 is the anti-misoperation apparatus shown in one of Fig. 1 to Fig. 4, owing to did detailed description hereinbefore, no longer is described here.Touch panel 501 leads sound by height and transparent material is made, for example glass.Anti-misoperation apparatus 502 is installed near the touch panel 501.The circuit unit of anti-misoperation apparatus 502 can be made a micro-circuit board separately and also can be integrated on the circuit board of framework 503 inside.This optical touch screen can effectively shield the invalid operation that drops on the touch panel owing to used the anti-misoperation apparatus 502 of excellent performance, makes that the input information of this optical touch screen is more accurate, has practical value.
Fig. 6 is according to the 3rd embodiment of the present utility model, brief description constitute the structural drawing of the Position Approximate relation between the features component of this optical touch screen.
With reference to Fig. 6, this optical touch screen comprises touch panel 501, framework 503, imageing sensor 504 and anti-misoperation apparatus, and anti-misoperation apparatus is the combination of sensor 101 and signal processing unit 102 among the figure.Sensor 101 is the mechanical force sensor, and the mechanical force sensor can be one of foil gauge, pressure transducer, pulling force sensor or combination.Different with sonic sensor, the mechanical force sensor is exported induced signal by the touch force situation that the senses touch panel is subjected to.For example, when the mechanical force sensor is foil gauge, can export induced signal by the touch force size that the detected touch panel of foil gauge is subjected to, when promptly the touch force that is subjected to when the detected touch panel of foil gauge is less than predetermined threshold value, then being considered as false touch touches, at this moment Shu Chu induced signal is that signal is touched in false touch, does not carry out operational processes; The touch force that is subjected to when the detected touch panel of foil gauge is during more than or equal to predetermined threshold value, then be considered as effective touch, at this moment Shu Chu induced signal is effective touch signal, and microprocessor can send the position that instruction detects this effective touch operation to the detection system of touch-screen then.
Although have illustrated and described two kinds of embodiment of the present utility model and prioritization scheme thereof, but those skilled in the art should understand under the situation that does not break away from the utility model spirit and principle and can change these embodiment and prioritization scheme thereof that its scope definition is in claim.
Claims (22)
1. anti-misoperation apparatus that is used for optical touch screen, it is characterized in that: described anti-misoperation apparatus comprises sensor and signal processing unit, the signal output part of described sensor is connected with the input end of described signal processing unit, described signal processing unit comprises amplifying circuit, wave filter, absolute value translation circuit, peak envelop detection circuit, comparer and microprocessor, and described amplifying circuit, wave filter, absolute value translation circuit, peak envelop detection circuit, comparer and microprocessor are sequentially connected togather.
2. the anti-misoperation apparatus that is used for optical touch screen as claimed in claim 1 is characterized in that: described sensor is a sonic sensor.
3. the anti-misoperation apparatus that is used for optical touch screen as claimed in claim 2 is characterized in that:
Described sonic sensor is a piezoelectric ceramic piece.
4. the anti-misoperation apparatus that is used for optical touch screen as claimed in claim 1 is characterized in that: be in series with between described wave filter and described absolute value translation circuit and be used to improve the automatic gain control circuit of peak detection accuracy and the control end of described automatic gain control circuit is connected with described microcontroller.
5. the anti-misoperation apparatus that is used for optical touch screen as claimed in claim 4 is characterized in that: described amplifying circuit is preposition differential amplifier circuit.
6. the anti-misoperation apparatus that is used for optical touch screen as claimed in claim 4 is characterized in that: described wave filter is multiple feedback-type bandpass filter.
7. as the described anti-misoperation apparatus that is used for optical touch screen of one of claim 1 to 6, it is characterized in that: the potentiometer that is in series with the centre frequency that is used to regulate described wave filter between described wave filter and the described microprocessor.
8. the anti-misoperation apparatus that is used for optical touch screen as claimed in claim 7 is characterized in that: described potentiometer is a digital regulation resistance.
9. the anti-misoperation apparatus that is used for optical touch screen as claimed in claim 1 is characterized in that: described sensor is the mechanical force sensor.
10. the anti-misoperation apparatus that is used for optical touch screen as claimed in claim 9 is characterized in that: described mechanical force sensor is one of foil gauge, pressure transducer, pulling force sensor or combination.
11. optical touch screen, comprise touch panel, anti-misoperation apparatus, it is characterized in that: described anti-misoperation apparatus comprises sensor and signal processing unit, the signal output part of described sensor is connected with the input end of described signal processing unit, described signal processing unit comprises amplifying circuit, wave filter, absolute value translation circuit, peak envelop detection circuit, comparer and microprocessor, and described amplifying circuit, wave filter, absolute value translation circuit, peak envelop detection circuit, comparer and microprocessor are sequentially connected togather.
12. optical touch screen as claimed in claim 11 is characterized in that: described sensor is a sonic sensor.
13. optical touch screen as claimed in claim 12 is characterized in that: described sonic sensor is a piezoelectric ceramic piece.
14. optical touch screen as claimed in claim 12 is characterized in that: described touch panel leads sound by height and transparent material is made.
15. optical touch screen as claimed in claim 14 is characterized in that: described touch panel is a glass plate.
16. optical touch screen as claimed in claim 11 is characterized in that: between described wave filter and described absolute value translation circuit, be in series with and be used to improve the automatic gain control circuit of peak detection accuracy and the control end of described automatic gain control circuit is connected with described microcontroller.
17. optical touch screen as claimed in claim 16 is characterized in that: described amplifying circuit is preposition differential amplifier circuit.
18. optical touch screen as claimed in claim 16 is characterized in that: described wave filter is multiple feedback-type bandpass filter.
19., it is characterized in that: the potentiometer that is in series with the centre frequency that is used to regulate described wave filter between described wave filter and the described microprocessor as the described optical touch screen of one of claim 11 to 18.
20. optical touch screen as claimed in claim 19 is characterized in that: described potentiometer is a digital regulation resistance.
21. optical touch screen as claimed in claim 11 is characterized in that: described sensor is the mechanical force sensor.
22. optical touch screen as claimed in claim 21 is characterized in that: described mechanical force sensor is one of foil gauge, pressure transducer, pulling force sensor or combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202229359U CN201741130U (en) | 2009-09-25 | 2009-09-25 | Misoperation preventing device for optical touch screen and optical touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202229359U CN201741130U (en) | 2009-09-25 | 2009-09-25 | Misoperation preventing device for optical touch screen and optical touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201741130U true CN201741130U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202229359U Expired - Fee Related CN201741130U (en) | 2009-09-25 | 2009-09-25 | Misoperation preventing device for optical touch screen and optical touch screen |
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|---|---|
| CN (1) | CN201741130U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103246380A (en) * | 2012-02-13 | 2013-08-14 | 汉王科技股份有限公司 | Touch device and touch operation processing method |
| WO2013123813A1 (en) * | 2012-02-20 | 2013-08-29 | 中国移动通信集团公司 | Method, device and mobile terminal for preventing erroneous touch on touchscreen of mobile terminal |
| CN103631431A (en) * | 2012-08-24 | 2014-03-12 | 三星显示有限公司 | Touchscreen display device and related method |
-
2009
- 2009-09-25 CN CN2009202229359U patent/CN201741130U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103246380A (en) * | 2012-02-13 | 2013-08-14 | 汉王科技股份有限公司 | Touch device and touch operation processing method |
| CN103246380B (en) * | 2012-02-13 | 2016-09-21 | 汉王科技股份有限公司 | Contactor control device and the processing method of touch control operation |
| WO2013123813A1 (en) * | 2012-02-20 | 2013-08-29 | 中国移动通信集团公司 | Method, device and mobile terminal for preventing erroneous touch on touchscreen of mobile terminal |
| CN103631431A (en) * | 2012-08-24 | 2014-03-12 | 三星显示有限公司 | Touchscreen display device and related method |
| CN103631431B (en) * | 2012-08-24 | 2018-01-30 | 三星显示有限公司 | Display device and operating method |
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Addressee: Beijing UNITOP New Technology Co., Ltd. Document name: Notification to Pay the Fees |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20180925 |
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Addressee: Tang Hai Bo Document name: Notification of Termination of Patent Right |