CN102722291B - Method for driving infrared multi-point touch screen - Google Patents
Method for driving infrared multi-point touch screen Download PDFInfo
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- CN102722291B CN102722291B CN201210179460.6A CN201210179460A CN102722291B CN 102722291 B CN102722291 B CN 102722291B CN 201210179460 A CN201210179460 A CN 201210179460A CN 102722291 B CN102722291 B CN 102722291B
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- infrared
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Abstract
The invention discloses a method for driving an infrared multi-point touch screen. A touch panel has a double-layer structure; vertically orthogonal infrared paired tubes are distributed on the periphery of a lower touch panel layer; slantly intersectant infrared paired tubes are distributed on the periphery of an upper touch panel layer; the infrared paired tubes on the periphery of the lower touch panel layer are divided into multiple groups and are driven at the same time and detect luminous flux of a receiving tube at the same time; after the infrared touch screen is started, the infrared paired tubes on the lower touch panel layer are driven first; if there is only one touch point, a direct response is made to the touch screen and scanning is ended; and if more than one touch point is detected, according to inclination angles of the inclined infrared paired tubes on the touch panel layer, positions of the inclined infrared paired tubes are computed, the infrared paired tubes are selectively driven, fake touch points are eliminated and multi-point touch is realized. By the method for driving the infrared multi-point touch screen, the scanning time of the infrared tubes is effectively shortened and the responding speed of the touch screen is improved.
Description
Technical field
The present invention relates to multi-point touch panel field, be specially a kind of driving method of infrared multi-point touch screen.
Background technology
Current application in all cases sensor-based touch-screen mainly contains resistive touch screen, capacitive touch screen, surface acoustic wave touch screen and infrared touch panel, relative to other touch-screens, infrared touch panel has good visual effect and positioning principle, and be not afraid of electromagnetic interference (EMI), especially, on large scale touch-screen, apply more extensive.Infrared touch panel is covered with infrared tube in the surrounding of touch-screen, wherein infrared transmitting tube and infrared receiving tube one_to_one corresponding, form orthogonal infrared network, once there be touch objects to touch, infrared receiving tube does not just receive the Infrared that infrared transmitting tube is launched, and can judge the position of touch point.But in large-sized application, the infrared tube quantity of use is more, and adding infrared transmitting tube has certain response time, and which results in the surface sweeping overlong time of touch-screen, the response time of touch-screen does not reach requirement.The patent No. 200920079315.4 patent discloses a kind of X, Y, Z tri-axle (vertical direction and oblique) scanned infrared to pipe to realize the method for multiple point touching, it scans one by one to transverse axis, the longitudinal axis and inclined shaft successively, the number of infrared tube rolls up, waste a lot of time, do not reach the requirement of response fast.
Summary of the invention
The object of the invention is to provide a kind of driving method of infrared multi-point touch screen, to solve the problem that sweep time is long, response speed is slow that prior art large scale infrared touch panel exists.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of driving method of infrared multi-point touch screen, it is characterized in that: adopt on having, the double-deck touch panel of lower floor, two-layer touch panel separately two adjacent side edges is furnished with infrared transmitting tube respectively, other two adjacent side edges are furnished with infrared receiving tube respectively separately, infrared receiving tube just right on each its offside edge of infrared transmitting tube emergent light one_to_one corresponding directive wherein on lower floor's touch panel, form perpendicular infrared tube, each infrared transmitting tube emergent light on the touch panel of upper strata is by the infrared receiving tube on its offside edge of oblique one_to_one corresponding directive, or each infrared transmitting tube emergent light on the touch panel of upper strata is by the infrared receiving tube on oblique its adjacent side edge of one_to_one corresponding directive, form oblique crossing infrared tube, the infrared tube at lower floor's touch panel edge is divided into many groups respectively, many groups infrared tube works simultaneously, when touch-screen is started working, first the perpendicular infrared tube of many groups on turntable driving lower floor touch panel, judged by the luminous flux gathering infrared receiving tube to touch the position occurred, when detect only have a touch point time, directly single-point response is carried out to touch-screen, a touch point is not only had when detecting, when there is ghost point in coordinate identification, multiple possible coordinate figure that is touched is obtained by calculating coordinate, respectively the coordinate figure obtained is calculated according to the angle of inclination of crossing infrared tube oblique on the touch panel of upper strata the position that on the touch panel of upper strata, infrared tube is blocked, pseudo-touch point can be got rid of, realize multiple point touching.
The driving method of described a kind of infrared multi-point touch screen, is characterized in that: the infrared tube on lower floor's touch panel is divided into some groups, and the infrared tube of all groups works simultaneously, and infrared transmitting tube launches infrared light, is received by corresponding infrared receiving tube.
The driving method of described a kind of infrared multi-point touch screen, is characterized in that: the infrared light that each infrared transmitting tube is launched can only be received by the infrared receiving tube with its formation infrared tube.
In the present invention, in order to improve the speed of response of large scale touch-screen, have employed fractional scanning, by the infrared tube separately scanning of touch panel levels, and infrared tube orthogonal for lower vertical being carried out packet transaction, several groups are driven simultaneously.The scanning of lower floor's infrared tube is only carried out when there being a touch point to touch, when there being multiple touch to occur simultaneously, the oblique crossing infrared tube in selectable driving upper strata, get rid of pseudo-touch point, greatly reduce the time of touch-screen run-down like this, touched point can be calculated fast, realize the quick response of touch-screen.
Accompanying drawing explanation
Fig. 1 is two kinds of one-piece construction schematic diagram of infrared touch panel of the present invention, wherein:
Fig. 1 (a) be infrared tube pitch angle larger time one-piece construction schematic diagram, Fig. 1 (b) be infrared tube pitch angle less time one-piece construction schematic diagram.
Fig. 2 is the infrared light path of inventive touch screen lower surface.
Fig. 3 is a kind of incline structure of inventive touch screen upper surface.
Fig. 4 is the infrared light path figure of inventive touch screen upper surface.
Fig. 5 is another touch panel surface structure of the present invention.
Fig. 6 is the index path that the multiple touch point of the present invention calculates.
Fig. 7 is a kind of embody rule structural drawing of infrared touch panel of the present invention.
Embodiment
As shown in Figure 1.The surrounding of upper strata touch panel and lower floor's touch panel is covered with infrared tube respectively, wherein the adjacent two edges of lower floor's touch panel are covered with infrared transmitting tube 12, all the other two neighboring edges are covered with infrared receiving tube 13, the infrared receiving tube 13 that on lower floor's touch panel, the emergent light one_to_one corresponding directive offside of each infrared transmitting tube 12 is just right, forms perpendicular infrared tube.The infrared transmitting tube 14 of inclination certain angle is placed with at upper strata touch panel two neighboring edges, two other neighboring edge is placed with the infrared receiving tube 15 of inclination certain angle, define as Fig. 1 (a) and (b) two kinds of structures according to the difference at angle of inclination, wherein in Fig. 1 (a), on the touch panel of upper strata, the infrared receiving tube of the emergent light one_to_one corresponding of each infrared transmitting tube diagonally on directive neighboring edge, forms oblique crossing infrared tube; In Fig. 1 (b), on the touch panel of upper strata, the infrared receiving tube of the emergent light one_to_one corresponding of each infrared transmitting tube diagonally on directive offside edge, forms oblique crossing infrared tube.
As shown in Figure 2.When only having individual layer infrared tube, once there be two touch, just there will be four light path AB, AD, BC, CD and being blocked, when identifying touch point, differentiate that A, C are touched? B, D? or ABC, ACD or ABCD.
As shown in Figure 3, be a kind of method of tilting of upper strata touch panel infrared tube.Wherein infrared transmitting tube 14 and infrared receiving tube 15 one_to_one corresponding on tilted direction, the light that coboundary infrared transmitting tube is launched in this one deck is received by lower limb infrared receiving tube, the light that right hand edge infrared transmitting tube is launched is received by left hand edge infrared receiving tube, defines the infrared network different from lower floor's touch panel infrared transmission direction.
As shown in Figure 4.Although the touch panel emission of light of the vergence direction shown in Fig. 4 can not make grid cover whole surface, picture 16, there is the blind area not having grid in 17 these points, but these places still have oblique Infrared to pass through, the identification of multiple touch point can be realized, and this region is very little, be enough to meet the demands.
As shown in Fig. 5.This is another multiple point touching structure similar to Fig. 4, and all infrared transmitting tubes are all inclination equal angular, and the propagation angle of light is also consistent, is received, meet Infrared and be covered with whole touch screen by different infrared receiving tubes.
As shown in Figure 6.Add the infrared light path on tilted direction, pseudo-touch point can be removed, judge which point is the real touch point touched actually.
As shown in Figure 7, show the calculated examples that a kind of infrared tube by lower floor's touch panel is divided into two groups, wherein grouping represents with m, n, p, q.After touch-screen starts, m, n two groups of infrared tube co-operation, p, q two groups of infrared tube co-operation, by judging that the luminous flux of receiving tube obtains the position of touch point; According to the size of touch-screen and the requirement of response speed, more groups of co-operation can also be divided into.
First the infrared tube of lower floor's touch panel surrounding is scanned, grouping on all transverse axis and the grouping on the longitudinal axis are driven respectively simultaneously, by the luminous flux of infrared receiving tube through AD conversion, the position of the infrared route that transverse axis and the longitudinal axis are blocked can be obtained, draw all possible touch coordinate by calculating coordinate.
Secondly, when detecting that touch point has and only has one, directly terminate present scan, the scanning of beginning next round, realizes the response of touch point.
If the touch point detected is when being two or more, calculating coordinate is obtained likely touch coordinate calculate the position of the infrared tube that may be blocked.The angle gauge namely tilted according to position and the infrared tube at the infrared tube place that is blocked calculates the ordinal number of the infrared tube that is blocked, the output signal of displacement latch is directly displaced to the row gating at the infrared tube place be blocked, carry out column selection by 3-8 code translator to lead to, be directly targeted to this pipe, and it is driven, save unnecessary sweep time.
Time consistent with the infrared tube angle of inclination on all upper stratas touch panel transverse and longitudinal axle shown in Fig. 6, calculate tilted direction and the position of lamp should be driven to be example.The length of consistent a, b can be converted into, and tilt angle theta, the length of c can be calculated by following formula, c is the distance of power valve From Left edge and the skew coordinates value of extreme position A that need to drive, in like manner can obtain the skew coordinates value of another extreme position D, thus the infrared emission scanning this point-to-point transmission is to managing.
c=b+acotθ
If transverse and longitudinal axle upper angle is not identical, its computing method are similar.
Then by there being the luminous flux selecting the infrared receiving tube driven to receive to analyze, contrast to these, what be blocked is true touch point, and what be not blocked is pseudo-touch point.
Finally, touch gestures is shown to the fitting operation of these true touch coordinates, the multiple point touching of infrared touch panel is responded.Forefathers have and much introduce the calculating of touch point and the article of multi-touch gesture, have become disclosed technology, have been not repeated here.
Claims (1)
1. the driving method of an infrared multi-point touch screen, it is characterized in that: adopt on having, the double-deck touch panel of lower floor, two-layer touch panel separately two adjacent side edges is furnished with infrared transmitting tube respectively, other two adjacent side edges are furnished with infrared receiving tube respectively separately, infrared receiving tube just right on each its offside edge of infrared transmitting tube emergent light one_to_one corresponding directive wherein on lower floor's touch panel, form perpendicular infrared tube, each infrared transmitting tube emergent light on the touch panel of upper strata is by the infrared receiving tube on its offside edge of oblique one_to_one corresponding directive, or each infrared transmitting tube emergent light on the touch panel of upper strata is by the infrared receiving tube on oblique its adjacent side edge of one_to_one corresponding directive, form oblique crossing infrared tube, the infrared tube at lower floor's touch panel edge is divided into many groups respectively, many groups infrared tube works simultaneously, when touch-screen is started working, first the perpendicular infrared tube of many groups on turntable driving lower floor touch panel, judged by the luminous flux gathering infrared receiving tube to touch the position occurred, when detect only have a touch point time, directly single-point response is carried out to touch-screen, a touch point is not only had when detecting, when there is ghost point in coordinate identification, multiple possible coordinate figure that is touched is obtained by calculating coordinate, respectively the coordinate figure obtained is calculated according to the angle of inclination of crossing infrared tube oblique on the touch panel of upper strata the position that on the touch panel of upper strata, infrared tube is blocked, pseudo-touch point can be got rid of, realize multiple point touching, infrared tube on lower floor's touch panel is divided into some groups, and the infrared tube of all groups works simultaneously, and infrared transmitting tube launches infrared light, is received by corresponding infrared receiving tube, the infrared light that each infrared transmitting tube is launched can only be received by the infrared receiving tube with its formation infrared tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210179460.6A CN102722291B (en) | 2012-06-01 | 2012-06-01 | Method for driving infrared multi-point touch screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210179460.6A CN102722291B (en) | 2012-06-01 | 2012-06-01 | Method for driving infrared multi-point touch screen |
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| CN102722291A CN102722291A (en) | 2012-10-10 |
| CN102722291B true CN102722291B (en) | 2015-07-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103488351A (en) * | 2013-08-27 | 2014-01-01 | 合肥工业大学 | New structure for improving precision of infrared touch screen |
| JP5880503B2 (en) * | 2013-09-11 | 2016-03-09 | コニカミノルタ株式会社 | Touch panel input device |
| CN103744558B (en) * | 2013-11-28 | 2017-01-18 | 苏州长风航空电子有限公司 | Intelligent dead point recognition and self-adaptation compensation method for infrared touch screen |
| CN104049797B (en) * | 2014-05-30 | 2017-11-03 | 湖州佳格电子科技股份有限公司 | Scanning range and the determination method of required scanning optical path needed for the identification of touch area |
| CN105204693B (en) * | 2014-06-19 | 2019-12-10 | 青岛海信电器股份有限公司 | Touch point identification method and device and touch screen equipment |
| CN105094462B (en) * | 2015-07-22 | 2018-04-10 | 深圳市天英联合教育股份有限公司 | Infrared touch screen and its touch detection method |
| CN105045439B (en) * | 2015-08-07 | 2018-08-21 | 青岛海信电器股份有限公司 | A kind of touch screen multipoint positioning method, device and touch-screen equipment |
| CN105260064B (en) * | 2015-10-15 | 2018-09-28 | 青岛海信电器股份有限公司 | A kind of touch point identification method and device and display equipment |
| CN105912156B (en) * | 2016-03-31 | 2019-03-15 | 青岛海信电器股份有限公司 | A kind of touch control method and terminal |
| CN106095187A (en) * | 2016-06-27 | 2016-11-09 | 中航华东光电有限公司 | Foreign body induction installation for infrared touch panel |
| CN106354593B (en) * | 2016-08-17 | 2019-10-18 | 青岛海信电器股份有限公司 | A kind of optical path detection method and optical path detection device |
| CN106598355A (en) * | 2016-11-23 | 2017-04-26 | 杭州碳诺电子科技有限公司 | Handwriting board device and method capable of identifying a plurality of characteristics of objects |
| CN107957826B (en) * | 2018-01-04 | 2020-10-30 | 河北华发教育科技股份有限公司 | Method and system for identifying multi-touch-point area of infrared touch screen |
| CN109871150B (en) * | 2019-03-11 | 2022-05-06 | 广州视源电子科技股份有限公司 | Touch signal processing method and intelligent interactive panel |
| CN112153187B (en) * | 2019-06-28 | 2022-06-14 | Oppo广东移动通信有限公司 | Electronic equipment and display screen state control method |
| CN111078060B (en) * | 2020-01-31 | 2022-06-03 | 广东新空电子科技股份有限公司 | Infrared touch frame jump scanning method, circuit, touch frame and electronic equipment |
| CN114415864B (en) * | 2020-10-13 | 2024-02-02 | 青岛海信商用显示股份有限公司 | Touch area determining method and display device |
| CN115309288B (en) * | 2022-08-09 | 2024-03-22 | 铂睿特(深圳)触控显示技术有限公司 | Touch screen terminal and method for solving touch screen deadlock |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101593062A (en) * | 2009-04-28 | 2009-12-02 | 广东威创视讯科技股份有限公司 | The method of a kind of infrared multi-point touch system and location thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593062A (en) * | 2009-04-28 | 2009-12-02 | 广东威创视讯科技股份有限公司 | The method of a kind of infrared multi-point touch system and location thereof |
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