CN102778979A - Optical touch method and device - Google Patents
Optical touch method and device Download PDFInfo
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- CN102778979A CN102778979A CN2012102175622A CN201210217562A CN102778979A CN 102778979 A CN102778979 A CN 102778979A CN 2012102175622 A CN2012102175622 A CN 2012102175622A CN 201210217562 A CN201210217562 A CN 201210217562A CN 102778979 A CN102778979 A CN 102778979A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 15
- 206010070834 Sensitisation Diseases 0.000 claims abstract description 56
- 230000008313 sensitization Effects 0.000 claims abstract description 56
- 239000012528 membrane Substances 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 abstract description 9
- 206010034960 Photophobia Diseases 0.000 abstract 1
- 208000013469 light sensitivity Diseases 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
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Abstract
The invention discloses an optical touch method, which comprises the following steps: detecting a plurality of lines with the maximum light sensitivity intensity of light rays reflected by a reflecting film in a light sensitive area of a camera on an optical touch screen; the photosensitive area of the camera comprises at least two rows formed by photosensitive pixel points; and receiving sensitization data generated according to a plurality of rows with the maximum sensitization intensity. In addition, an optical touch device is also disclosed. In the invention, the lines with the maximum light sensing intensity are used as light sensing areas when the camera works and light sensing data generated by the lines are received, so that the problems caused by the deformation of the structure of the touch screen, glass on the touch screen, the camera and the like can be solved, and the camera can receive return light more stably and reliably. Meanwhile, by means of the invention, the optical touch screen can effectively avoid the interference of external light, ensure the highest energy of the return light received by the camera, and improve the identification efficiency of the optical touch screen.
Description
Technical field
The present invention relates to the touch screen technology field, relate in particular to a kind of optical touch method and a kind of optical touch device.
Background technology
For the touch-screen that comprises camera, illuminator and reflective membrane, its principle of work is that the light that illuminator sends is parallel to the glass on the touch-screen, returns through reflective pleurodiaphragmatic in terspace road, is received by camera.When touching when a bit, the light that ejaculation light and the camera through illuminator receives can be confirmed the coordinate of touch point, realizes touching reaction.But in practical application,, distortion causes a deviation owing to appearring in the structure of touch-screen, glass and camera on the touch-screen easily.Therefore, often occur the received return projector intensity of camera a little less than, even do not receive the situation of return projector.So how to overcome structure, the glass on the touch-screen because of touch-screen and the first-class distortion that brings of making a video recording, more reliable and more stable when making camera reception return projector, become a problem demanding prompt solution.
Summary of the invention
For solving the problem of above-mentioned existence, the invention provides a kind of optical touch method and a kind of optical touch device.
A kind of optical touch method may further comprise the steps:
On optical touch screen, in the photosensitive region of camera, detect the maximum several rows of the sensitization intensity of reflective membrane institute reflection ray; Wherein, the photosensitive region of said camera comprises at least two row of being made up of the light-sensitive image vegetarian refreshments;
Reception is according to the maximum sensitization data that several rows produced of said sensitization intensity.
Compare with general technology, in optical touch method of the present invention, the photosensitive region of camera comprises the row that several are made up of the light-sensitive image vegetarian refreshments.Photosensitive region when working as camera through the several rows that sensitization intensity is maximum; And receive the sensitization data of its generation; Can overcome the problem that structure, the glass on the touch-screen because of touch-screen and the first-class Zona transformans of making a video recording come, make when camera receives return projector more reliable and more stable.Simultaneously; Because the sensitization intensity to reflective membrane institute reflection ray during camera work is maximum, therefore by the present invention, optical touch screen can be avoided the interference of extraneous light effectively; Guarantee that the received return projector energy of camera is the highest, promote the identification efficient of optical touch screen.
A kind of optical touch device comprises: detection module and receiver module;
Said detection module is used for the photosensitive region of camera on optical touch screen, detects the maximum several rows of the sensitization intensity of reflective membrane institute reflection ray; Wherein, the photosensitive region of said camera comprises at least two row of being made up of the light-sensitive image vegetarian refreshments;
Said receiver module is used to receive according to the maximum sensitization data that several rows produced of said sensitization intensity.
Compare with general technology, in optical touch device of the present invention, the photosensitive region of camera comprises the row that several are made up of the light-sensitive image vegetarian refreshments.Photosensitive region when working as camera through the several rows that sensitization intensity is maximum; And receive the sensitization data of its generation; Can overcome the problem that structure, the glass on the touch-screen because of touch-screen and the first-class Zona transformans of making a video recording come, make when camera receives return projector more reliable and more stable.Simultaneously; Because the sensitization intensity to reflective membrane institute reflection ray during camera work is maximum, therefore by the present invention, optical touch screen can be avoided the interference of extraneous light effectively; Guarantee that the received return projector energy of camera is the highest, promote the identification efficient of optical touch screen.
Description of drawings
Fig. 1 is the schematic flow diagram of optical touch method of the present invention;
Fig. 2 is the structural representation of optical touch device of the present invention.
Embodiment
Be further set forth the present invention technological means of being taked and the effect that obtains,,, know and complete description technical scheme of the present invention below in conjunction with accompanying drawing and preferred embodiment.
See also Fig. 1, be the schematic flow diagram of optical touch method of the present invention.Optical touch method of the present invention may further comprise the steps:
In the photosensitive region of S101 camera on optical touch screen, detect the maximum several rows of the sensitization intensity of reflective membrane institute reflection ray; Wherein, the photosensitive region of said camera comprises at least two row of being made up of the light-sensitive image vegetarian refreshments;
As one of them embodiment, the photosensitive region of said camera can be the matrix of being made up of photosensitive pixel point.
As one of them embodiment, can adopt the mode of linear array scanning to detect the sensitization intensity of camera photosensitive region to reflective membrane institute reflection ray.For example, can the photosensitive region of camera on the optical touch screen be designed to the matrix of the capable M row of N, wherein M represents the number of pixels across point, and N is the number of vertical pixel.Like this, the camera photosensitive region comprises the 1st to walk to N capable.It is capable capable to b that reflective membrane institute reflection ray can be designated as a in the corresponding receiving area of camera, wherein, the numerical value of a and b between 1 and N between.When camera was installed, the numerical value of a and b can change, and can carry out automatic linear array scanning, to search out the value of a and b accurately.What this moment, a represented to b is a photosensitive region scope; Proceed linear array scanning until finding best photosensitive region c; Also be the central area of the corresponding reflective membrane of photosensitive region of the capable representative of c, the reflected energy of return projector is the strongest, and the interference performance of anti-extraneous light also is the strongest.In fact, present common practices is that the photosensitive region of camera in the optical touch screen only is delegation's light-sensitive image vegetarian refreshments, thereby rather than comprises that multirow light-sensitive image vegetarian refreshments forms a zone that coverage rate is wider.Just because of present common practices is that delegation's light-sensitive image vegetarian refreshments forms the photosensitive region in the camera, therefore when the glass on the structure that touch-screen occurs, the touch-screen and when making a video recording first-class distortion, with the stability and the reliability that influence camera reception return projector.The present invention then can effectively address this problem.
As one of them embodiment; The step of the several rows that said detection sensitization intensity is maximum; Can may further comprise the steps:, detect its sensitization intensity respectively reflective membrane institute reflection ray to each row formed by the light-sensitive image vegetarian refreshments in the said camera photosensitive region; According to above-mentioned testing result, in each row, choose the maximum several rows of sensitization intensity.
In order to detect to the maximum several rows of the sensitization intensity of reflective membrane institute reflection ray; It also is the best photosensitive region of energy; Can adopt polling mode to visit in the camera photosensitive region each successively, write down the content and the result of linear array scanning each time by the row that the light-sensitive image vegetarian refreshments is formed, the analysis of utilization matrix data enumerate algorithm; Finding the content of M best light-sensitive image vegetarian refreshments, also is the maximum row of sensitization intensity.And the information such as relative index, coding of light-sensitive image vegetarian refreshments content in the maximum row of record sensitization intensity, and be stored in the internal memory.
S102 receives according to the maximum sensitization data that several rows produced of said sensitization intensity.
As one of them embodiment, can receive according to the maximum sensitization data that row produced of sensitization intensity.
Also can adopt dynamic linear array scanning technology, promptly when structure and the variation of extraneous light, adjust the used photosensitive region of camera work automatically.
Compare with general technology, in optical touch method of the present invention, the photosensitive region of camera comprises the row that several are made up of the light-sensitive image vegetarian refreshments.Photosensitive region when working as camera through the several rows that sensitization intensity is maximum; And receive the sensitization data of its generation; Can overcome the problem that structure, the glass on the touch-screen because of touch-screen and the first-class Zona transformans of making a video recording come, make when camera receives return projector more reliable and more stable.Simultaneously; Because the sensitization intensity to reflective membrane institute reflection ray during camera work is maximum, therefore by the present invention, optical touch screen can be avoided the interference of extraneous light effectively; Guarantee that the received return projector energy of camera is the highest, promote the identification efficient of optical touch screen.
See also Fig. 2, be the structural representation of optical touch device of the present invention.Optical touch device of the present invention comprises: detection module 201 and receiver module 202;
Said detection module 201 is used for the photosensitive region of camera on optical touch screen, detects the maximum several rows of the sensitization intensity of reflective membrane institute reflection ray; Wherein, the photosensitive region of said camera comprises at least two row of being made up of the light-sensitive image vegetarian refreshments;
As one of them embodiment, said detection module 201 can be used for each row be made up of the light-sensitive image vegetarian refreshments in the said camera photosensitive region is detected its sensitization intensity to reflective membrane institute reflection ray respectively; And, in each row, choose the maximum several rows of sensitization intensity according to above-mentioned testing result.
The mode of linear array scanning that can adopt said detection module 201 detects the sensitization intensity of camera photosensitive region to reflective membrane institute reflection ray.In addition, the photosensitive region of said camera can be the matrix of being made up of photosensitive pixel point.
Said receiver module 202 is used to receive according to the maximum sensitization data that several rows produced of said sensitization intensity.
As one of them embodiment, said receiver module 202 can be used for receiving according to the maximum sensitization data that row produced of sensitization intensity.
Compare with general technology, in optical touch device of the present invention, the photosensitive region of camera comprises the row that several are made up of the light-sensitive image vegetarian refreshments.Photosensitive region when working as camera through the several rows that sensitization intensity is maximum; And receive the sensitization data of its generation; Can overcome the problem that structure, the glass on the touch-screen because of touch-screen and the first-class Zona transformans of making a video recording come, make when camera receives return projector more reliable and more stable.Simultaneously; Because the sensitization intensity to reflective membrane institute reflection ray during camera work is maximum, therefore by the present invention, optical touch screen can be avoided the interference of extraneous light effectively; Guarantee that the received return projector energy of camera is the highest, promote the identification efficient of optical touch screen.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (7)
1. an optical touch method is characterized in that, may further comprise the steps:
On optical touch screen, in the photosensitive region of camera, detect the maximum several rows of the sensitization intensity of reflective membrane institute reflection ray; Wherein, the photosensitive region of said camera comprises at least two row of being made up of the light-sensitive image vegetarian refreshments;
Reception is according to the maximum sensitization data that several rows produced of said sensitization intensity.
2. optical touch method according to claim 1 is characterized in that, the matrix of the photosensitive region of said camera for being made up of the light-sensitive image vegetarian refreshments.
3. optical touch method according to claim 1 is characterized in that, the step of the several rows that said detection sensitization intensity is maximum may further comprise the steps:
To each row formed by the light-sensitive image vegetarian refreshments in the said camera photosensitive region, detect its sensitization intensity respectively to reflective membrane institute reflection ray;
According to above-mentioned testing result, in each row, choose the maximum several rows of sensitization intensity.
4. optical touch method according to claim 1 is characterized in that, the step of said reception sensitization data may further comprise the steps:
Reception is according to the maximum sensitization data that row produced of sensitization intensity.
5. an optical touch device is characterized in that, comprising: detection module and receiver module;
Said detection module is used for the photosensitive region of camera on optical touch screen, detects the maximum several rows of the sensitization intensity of reflective membrane institute reflection ray; Wherein, the photosensitive region of said camera comprises at least two row of being made up of the light-sensitive image vegetarian refreshments;
Said receiver module is used to receive according to the maximum sensitization data that several rows produced of said sensitization intensity.
6. optical touch device according to claim 5 is characterized in that, said detection module is used for each row be made up of the light-sensitive image vegetarian refreshments to said camera photosensitive region, detects its sensitization intensity to reflective membrane institute reflection ray respectively;
And, in each row, choose the maximum several rows of sensitization intensity according to above-mentioned testing result.
7. optical touch device according to claim 5 is characterized in that, said receiver module is used to receive according to the maximum sensitization data that row produced of sensitization intensity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102175622A CN102778979A (en) | 2012-06-28 | 2012-06-28 | Optical touch method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102175622A CN102778979A (en) | 2012-06-28 | 2012-06-28 | Optical touch method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237176A (en) * | 2013-04-24 | 2013-08-07 | 广州视睿电子科技有限公司 | Light source brightness adjusting method and device of optical imaging touch frame |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1440539A (en) * | 2000-07-05 | 2003-09-03 | 智能技术公司 | Camera-based touch system |
| CN1599894A (en) * | 1999-10-27 | 2005-03-23 | 数字墨水公司 | Tracking motion of a writing instrument |
| CN1860431A (en) * | 2003-05-19 | 2006-11-08 | 株式会社伊特 | Location detecting apparatus using area image sensor |
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2012
- 2012-06-28 CN CN2012102175622A patent/CN102778979A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1599894A (en) * | 1999-10-27 | 2005-03-23 | 数字墨水公司 | Tracking motion of a writing instrument |
| CN1440539A (en) * | 2000-07-05 | 2003-09-03 | 智能技术公司 | Camera-based touch system |
| CN1860431A (en) * | 2003-05-19 | 2006-11-08 | 株式会社伊特 | Location detecting apparatus using area image sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237176A (en) * | 2013-04-24 | 2013-08-07 | 广州视睿电子科技有限公司 | Light source brightness adjusting method and device of optical imaging touch frame |
| CN103237176B (en) * | 2013-04-24 | 2016-08-24 | 广州视睿电子科技有限公司 | Light source brightness adjusting method and device of optical imaging touch frame |
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Application publication date: 20121114 |