CN101620483A - Infrared touch screen with camera and detection method thereof - Google Patents
Infrared touch screen with camera and detection method thereof Download PDFInfo
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- CN101620483A CN101620483A CN200810116170A CN200810116170A CN101620483A CN 101620483 A CN101620483 A CN 101620483A CN 200810116170 A CN200810116170 A CN 200810116170A CN 200810116170 A CN200810116170 A CN 200810116170A CN 101620483 A CN101620483 A CN 101620483A
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Abstract
The invention discloses an infrared touch screen with a camera. The infrared touch screen with the camera consists of a display screen, the camera, infrared transmitting and receiving pair tube arrays, an accessory circuit and a processor, wherein the camera is arranged at one corner of the display screen; the infrared transmitting and receiving pair tube arrays are arranged along four sides of the display screen area; the accessory circuit is connected with an infrared transmitting tube and an infrared receiving tube; and the processor is used for controlling the circuit and storing, calculating and transmitting detected data. The infrared touch screen with the camera has the advantages of easy manufacture, low cost, quick response, and the like.
Description
Technical field
The present invention relates to photoelectric detection technology field, relate in particular to a kind of detection method that is used for the photoelectric detecting technology of infrared touch panel and is used to detect a plurality of touch points.
Background technology
As a branch of computing machine touch-screen, infrared touch panel is with advantages such as its anti-knock properties easy for installation, non-maintaining, high, high reliability and be widely used in every field gradually.Progress along with computer hardware technique, computing machine has had function from strength to strength, also more and more being applied to almost, we can imagine any field that obtains, so at different applications, sometimes the multiple point touching technology more can make user's handled easily computing machine, perhaps at specific software, the multiple point touching technology is more efficient.But this just requires touch-screen to support multiple point touching, can detect to surpass one touch point.
It as application number the infrared multi-point touch screen of 200710100010.2 and 200710117751.1 patent disclosure, they are simple in structure, almost need not to change the structure of existing touch-screen, it is slow that but the shortcoming that is not easy to overcome is a response speed, limited in the applications of some response speed of having relatively high expectations.
Summary of the invention
In order to solve the problem of existing multiple point touching technology, the invention provides a kind of band camera infrared touch panel, include along display screen area infrared emission of arranging all around and the accessory circuit that receives pipe array, the described infrared transmitting tube of connection and receiving tube, and the microprocessor system of controlling the also storage of described circuit, calculating, the detected data of transmission, it also includes at least one camera, described camera is installed on the display screen edge, and described camera data-out port is connected with microprocessor system by data line.
Further, the photoelectric sensing chip in the described camera can be the sensing chip of linear array structure.
A nearlyer step, described camera field angle covers the entire display screen zone.
Further, the infrared illumination source that is used for the camera image collection is installed at the display screen edge.
Further, described infrared emission and reception all are connected with a described microprocessor system by the I/O port to the accessory circuit and the described camera of pipe array, the described infrared transmitting tube of connection and receiving tube.
Further, described microprocessor has two; One is connected with parts with each circuit that constitutes infrared touch panel, is used for calculating, handles infrared touch panel and detect various data; Another microprocessor is connected with camera, is used to calculate, handle image information that camera captures and the data that partly send from infrared touch panel; Be connected by input/output port between described two microprocessors.
A kind of method that detects a plurality of touch points, this method be applied to by the camera that is installed on the display screen edge and by the infrared emission of arranging around the display screen area and receive to the pipe array, connect the accessory circuit of described infrared transmitting tube and receiving tube and control described circuit and storage, calculate, band camera infrared touch panel that the infrared touch that microprocessor constituted of the detected data of transmission constitutes jointly, may further comprise the steps:
(1) starts the touch trace routine, control infrared emission respectively, receive, detect whether there is touch objects pipe and camera scanning entire display screen zone;
(2), the infrared emission that recording storage is connected when infrared ray is cut off each time, receive the view data of the touch objects that the inside sequence number of pipe or address and camera are caught if there is touch objects;
(3) data that obtain according to step (2) are judged the quantity of touch point, if a touch point, execution in step (6) then, if the quantity of touch point more than one, steps performed (4) then;
(4), obtain the coordinate figure of several possible touch points with vertical and horizontal sequence number or the address value combination that is cut off to pipe;
(5) view data of the touch objects that obtains of the intrinsic coordinates value of the possible coordinate points that step (4) is obtained and step (2) by microprocessor relatively, analyze the back and reject pseudo-touch point, obtain the coordinate figure of true touch point;
(6) coordinate figure of the true touch point that step (3) or (5) are obtained is transferred in the computer system.
A nearlyer step, control infrared emission described in the step (1) respectively, receive pipe and this link of camera scanning entire display screen zone are comprised following mode:
A, infrared emission, reception scan display screen area simultaneously to pipe and camera;
B, infrared emission, reception scan display screen area earlier managing, and camera scans to display screen area more then;
C, camera scan display screen area earlier, and infrared emission, reception scan display screen area pipe again then.
Band camera infrared touch panel of the present invention has following advantage:
(1) mode of the plug-in camera of employing realizes the detection of multiple touch points, compares with existing infrared multi-point touch screen and has improved response speed, has reduced manufacture difficulty, has saved production cost.
(2) can repack existing common infrared touch panel into infrared multi-point touch screen.Do not need to replace touch-screen, only the application program of the camera of need plug-in internal processor on existing common infrared touch panel and replacement touch-screen internal processor just can realize the detection of multiple touch points, greatly reduces the cost of common infrared touch panel to the infrared multi-point touch screen transition.
Description of drawings
Fig. 1 is the mounting structure of band camera infrared touch panel of the present invention and detects principle schematic;
Fig. 2 is the inner connecting structure synoptic diagram of band camera infrared touch panel of the present invention;
Fig. 3 is the inner connecting structure synoptic diagram of an embodiment of the present invention;
Fig. 4 is the detection method main flow synoptic diagram of band camera infrared touch panel of the present invention;
Embodiment
With reference to Fig. 1, Fig. 2, band camera infrared touch panel of the present invention is by the face battle array camera 1 that is installed on one jiao of display screen (face battle array camera field angle covers the entire display screen zone), the infrared illumination source that is used for the camera image collection is installed at the display screen edge, infrared transmitting tube 2 and infrared receiving tube 3 arrays arranged around the display screen area, connect the accessory circuit of described infrared transmitting tube 2 and infrared receiving tube 3 and control described circuit and storage, calculate, the microprocessor 4 that transmits detected data constitutes, 3 pairs of pipes of infrared transmitting tube 2 and infrared receiving tube array, connect the accessory circuit of infrared transmitting tube 2 and receiving tube 3 and face battle array and take the photograph 1, all link to each other with microprocessor 4 by the I/O port, microprocessor 4 is connected with computer system 6 by output terminal 5.
Top structure is a kind of basic embodiment of the present invention, and promptly camera and infrared touch panel constitute the embodiment of an integral body.The present invention also has another embodiment, i.e. camera and the embodiment that has common infrared touch panel combination now.This embodiment is with reference to Fig. 3, repack existing common infrared touch panel into infrared multi-point touch screen of the present invention only needs to connect with usb data line or COM data line an embedded micro-processor 4 on existing common infrared touch panel face battle array camera 1, simultaneously the application program of microprocessor 4 in the common infrared touch panel is changed, it can be write down many infrared emission that is blocked is received data to pipe.Like this, the output data of the microprocessor 41 of common infrared touch panel inside is transported to the microprocessor 4 of camera 1 inside, the microprocessor 4 of camera 1 inside links to each other with computer system 6 by output port 5 and gets final product, and so just makes original common infrared touch panel possess the function that multiple touch points detects.
With reference to Fig. 4, Fig. 4 is the detection method main flow synoptic diagram of band camera infrared touch panel of the present invention.Step 401 is the setting up procedures that detect, start and touch trace routine, control infrared transmitting tube 2, infrared receiving tube 3 pairs of pipes array and face battle array camera 1 scanning entire display screen zone respectively, whether detection exists touch objects, this link can be divided into following three kinds of mode: A, infrared transmitting tube 2, infrared receiving tube 3 pairs of pipes array and face battle array camera 1 scans display screen area simultaneously; B, infrared transmitting tube 2,3 pairs of pipes of infrared receiving tube array scan display screen area earlier, and face battle array camera 1 scans to display screen area more then; C, face battle array camera 1 scan to display screen area, and infrared transmitting tube 2,3 pairs of pipes of infrared receiving tube array scan display screen area more then; In step 401, there is touch objects as discovery, then enter data acquisition step 402, the view data of the touch objects that the inside sequence number of the infrared transmitting tube 2 that recording storage is connected when infrared ray is cut off each time, 3 pairs of pipes of infrared receiving tube array or address and face battle array camera 1 are caught; Enter determination step 403 subsequently, the data that obtain according to step 402 are judged the quantity of touch point, if a touch point, then execution in step 406, if the quantity of touch point more than one, then steps performed 404; Step 404 is a combination step, microprocessor 4 is with vertical and horizontal sequence number or the address value combination to pipe that is cut off, obtain the intrinsic coordinates value of several possible touch points, for example, with reference to Fig. 1, suppose to have 2 touch point A and B, the sequence number of two pairs of infrared transmitting tubes 2 that are blocked at vertical light is a and b, the sequence number that is blocked two pairs of infrared transmitting tubes 2 in transverse light rays is c and d, so just be equivalent to to transmit and receive sequence number pipe, perhaps to receive the scan address of pipe in microcontroller be that the intrinsic coordinates of coordinate linear module is among the XOY in emission, will be at the coordinate figure that a and two touch objects of b vertically occur, at the coordinate figure that c and two touch objects of d laterally will occur.With this four coordinate figures combination, just can obtain A (c, a), B (d, b), C (d, a) and D (c, b) four touch objects possible positions; The intrinsic coordinates value that enters the possible coordinate points that screening step 405 obtains step (4) subsequently and the view data of the touch objects that step (2) obtains by microprocessor 4 relatively, can reject pseudo-touch point after the analysis obtain the intrinsic coordinates value of true touch point.Carry out response of step 406 subsequently, the coordinate figure of the true touch point (under multiple point touching situation shown in Figure 1, really the touch point is A, B) that step 403 or 405 is obtained is transferred in the computer system 6, makes response to touching instruction.
In order to realize the rejecting of pseudo-touch point, the position data that obtains four possibilities touch point A, B, C, D is transferred in the microprocessor 4 of face battle array camera 1 inside.At intrinsic coordinates is among the XOY, supposes that from the angle of any straight line Y-axis of initial point 0 be ∠ β, and then the tangent value of the angle of straight line OA, OB, OC, OD and Y-axis is respectively tg β
A=a/c, tg β
B=b/d, tg β
C=a/d, tg β
d=b/c can calculate ∠ β according to these data surface battle array camera 1 processor inside
A, ∠ β
B, ∠ β
CWith ∠ β
DThe number of degrees, meanwhile, the angle of angle, then ∠ β between face battle array camera 1 and the y axle when touch objects view data that obtains by analytical procedure 402 can be obtained the touch objects image at that time
A, ∠ β
B, ∠ β
CWith ∠ β
DIn identical with described angle angle then be the angle angle of real touch point place straight line and y axle, analyze and draw ∠ β
A, ∠ β
BAngle conform to the angle angle that view data draws, then 2 of A, B are true touch point, ∠ β
C, ∠ β
DAngle do not conform to the angle angle that view data draws, then 2 of C, D are pseudo-touch point; In Fig. 1, real touch point A, B represent with solid line circle 101, pseudo-touch point C, 102 expressions of D with dashed lines circle, and the infrared ray of infrared transmitting tube 2 emissions represents that with arrow solid line 103 infrared ray that the thing that wherein is touched stops is represented with arrow dotted line 104.
The basic structure scheme of the invention process that the foregoing description is given is not whole possible constructions in actual applications, as uses more camera, and each camera is responsible for the structures such as picture catching of a screen surface part.Therefore protection scope of the present invention is not limited to above-mentioned basic structure.
Claims (8)
1, a kind of band camera infrared touch panel, include along display screen area infrared emission of arranging all around and the accessory circuit that receives pipe array, the described infrared transmitting tube of connection and receiving tube, and the microprocessor system of controlling the also storage of described circuit, calculating, the detected data of transmission, it is characterized in that: it also includes at least one camera, described camera is installed on the display screen edge, and described camera data-out port is connected with microprocessor system by data line.
2, band camera infrared touch panel according to claim 1 is characterized in that: the photoelectric sensing chip in the described camera can be the sensing chip of linear array structure.
3, band camera infrared touch panel according to claim 1 and 2 is characterized in that: described camera field angle covers the entire display screen zone.
4, band camera infrared touch panel according to claim 1 is characterized in that: the infrared illumination source that is used for the camera image collection is installed at the display screen edge.
5, band camera infrared touch panel according to claim 1, it is characterized in that: described infrared emission and reception all are connected with a described microprocessor system by the I/O port to the accessory circuit and the described camera of pipe array, the described infrared transmitting tube of connection and receiving tube.
6, band camera infrared touch panel according to claim 1, it is characterized in that: described microprocessor has two; One is connected with parts with each circuit that constitutes infrared touch panel, is used for calculating, handles infrared touch panel and detect various data; Another microprocessor is connected with camera, is used to calculate, handle image information that camera captures and the data that partly send from infrared touch panel; Be connected by input/output port between described two microprocessors.
7, a kind of method that detects a plurality of touch points, this method be applied to by the camera that is installed on the display screen edge and by the infrared emission of arranging around the display screen area and receive to the pipe array, connect the accessory circuit of described infrared transmitting tube and receiving tube and control described circuit and storage, calculate, band camera infrared touch panel that the infrared touch that microprocessor constituted of the detected data of transmission constitutes jointly, may further comprise the steps:
(1) starts the touch trace routine, control infrared emission respectively, receive, detect whether there is touch objects pipe and camera scanning entire display screen zone;
(2), the infrared emission that recording storage is connected when infrared ray is cut off each time, receive the view data of the touch objects that the inside sequence number of pipe or address and camera are caught if there is touch objects;
(3) data that obtain according to step (2) are judged the quantity of touch point, if a touch point, execution in step (6) then, if the quantity of touch point more than one, steps performed (4) then;
(4), obtain the coordinate figure of several possible touch points with vertical and horizontal sequence number or the address value combination that is cut off to pipe;
(5) view data of the touch objects that obtains of the intrinsic coordinates value of the possible coordinate points that step (4) is obtained and step (2) by microprocessor relatively, analyze the back and reject pseudo-touch point, obtain the coordinate figure of true touch point;
(6) coordinate figure of the true touch point that step (3) or (5) are obtained is transferred in the computer system.
8, the method for a plurality of touch points of detection according to claim 7 is characterized in that: control infrared emission described in the step (1) respectively, receive pipe and this link of camera scanning entire display screen zone are comprised following mode:
A, infrared emission, reception scan display screen area simultaneously to pipe and camera;
B, infrared emission, reception scan display screen area earlier managing, and camera scans to display screen area more then;
C, camera scan display screen area earlier, and infrared emission, reception scan display screen area pipe again then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810116170A CN101620483A (en) | 2008-07-04 | 2008-07-04 | Infrared touch screen with camera and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810116170A CN101620483A (en) | 2008-07-04 | 2008-07-04 | Infrared touch screen with camera and detection method thereof |
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| CN101620483A true CN101620483A (en) | 2010-01-06 |
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| CN200810116170A Pending CN101620483A (en) | 2008-07-04 | 2008-07-04 | Infrared touch screen with camera and detection method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011110100A1 (en) * | 2010-03-12 | 2011-09-15 | 北京汇冠新技术股份有限公司 | Control panel and serial port communication arbiter for touch screen with camera |
| WO2011144013A1 (en) * | 2010-05-19 | 2011-11-24 | 北京汇冠新技术股份有限公司 | Light sources, mounting method thereof, touch screen, touch system and display |
| CN102346602A (en) * | 2011-07-01 | 2012-02-08 | 广东威创视讯科技股份有限公司 | Multi-point touch display screen device |
-
2008
- 2008-07-04 CN CN200810116170A patent/CN101620483A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011110100A1 (en) * | 2010-03-12 | 2011-09-15 | 北京汇冠新技术股份有限公司 | Control panel and serial port communication arbiter for touch screen with camera |
| CN102193683A (en) * | 2010-03-12 | 2011-09-21 | 北京汇冠新技术股份有限公司 | Control board and serial communication arbiter for touch screen with camera |
| CN102193683B (en) * | 2010-03-12 | 2014-09-03 | 北京汇冠新技术股份有限公司 | Control board and serial communication arbiter for touch screen with camera |
| US8892790B2 (en) | 2010-03-12 | 2014-11-18 | Beijing Irtouch Systems Co., Ltd | Control panel and serial port communication arbiter for touch screen with camera |
| WO2011144013A1 (en) * | 2010-05-19 | 2011-11-24 | 北京汇冠新技术股份有限公司 | Light sources, mounting method thereof, touch screen, touch system and display |
| CN102346602A (en) * | 2011-07-01 | 2012-02-08 | 广东威创视讯科技股份有限公司 | Multi-point touch display screen device |
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Application publication date: 20100106 |