CN101593062B - Infrared multi-point touch system and positioning method thereof - Google Patents
Infrared multi-point touch system and positioning method thereof Download PDFInfo
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- CN101593062B CN101593062B CN2009100390478A CN200910039047A CN101593062B CN 101593062 B CN101593062 B CN 101593062B CN 2009100390478 A CN2009100390478 A CN 2009100390478A CN 200910039047 A CN200910039047 A CN 200910039047A CN 101593062 B CN101593062 B CN 101593062B
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Abstract
The invention discloses an infrared multi-point touch system and a positioning method thereof. The system comprises a coordinate detection unit and an auxiliary detection unit, wherein the coordinate detection unit comprises two groups of oppositely arranged infrared transmitting and receiving tubes forming scanning infrared ray arrays in horizontal and vertical directions; the auxiliary detection unit and the coordinate detection unit are overlapped and arranged on a display screen, and the auxiliary detection unit comprises at least one group of obliquely opposite infrared transmitting and receiving tubes, and at least one group of transmitting and receiving tubes forms an oblique scanning infrared ray array; and the auxiliary detection unit and the coordinate unit perform the synchronous scanning detection of the display screen according to received synchronous scanning signals respectively. The coordinate detection unit and the auxiliary detection unit of the invention can performthe synchronous scanning detection of the display screen according to the received synchronous scanning signals, reduce scanning period and improves refresh rate of the infrared multi-point touch system of the invention.
Description
Technical field
The present invention relates to infrared touch system, relate in particular to the method for a kind of infrared multi-point touch system and infrared multi-point touch system location.
Background technology
The basic structure of infrared single-point touches system in the market is to install some to infrared emission component and infrared receiver component in a certain order a surperficial edge that is fit to the touch-screen installed.These infrared emission components and infrared receiver component according to mode one to one form emission receive right, edge along touch screen surface constitutes a mutually perpendicular emission receiving array, under the control of microcomputer system, connect each in a certain order respectively to emission and infrared receiver component, detect each whether the Infrared between infrared emission and the infrared receiver component is blocked, judge whether have touch event to take place with this.This lattice structure detection mode makes existing infrared touch system in the given period, detection system receives only unique one group of position coordinate data, therefore when having only a touch point, infrared touch system can operate as normal, when operating simultaneously for two or more touch points, infrared touch system is with the position coordinates of miscount, and the touch place that causes reporting is not the place of actual touch.
In order to solve the situation that multiple point touching can't be discerned, application number is 200710031082.6, the patented claim that open day is on March 26th, 2008 discloses a kind of infrared touch panel, comprise infrared emission component that is arranged on the infrared emission sweep circuit plate and the infrared receiver component that is arranged on the infrared ray reception sweep circuit plate, at least one detection side upwards, the light that infrared emission component on the described infrared emission sweep circuit sends except can by one with its vertical infrared receiver component that receives over against locational infrared ray on the sweep circuit receives, can also be departed from the infrared receiver component that vertically promptly tilts infrared ray relative and receive on the sweep circuit by at least one and receive constantly in difference over against the position.This scheme is the corresponding auxiliary detection technology of having introduced on the basis of common single-point touches detection technique, detecting the scan period with one is divided into and is divided into two scan periods at least, the light that infrared emission component sends in preceding half scan period by with it vertically over against an infrared receiver component receive and detect, infrared emission component is connected one by one and is lighted, vertical with them over against infrared receiver component receive detection one by one, this process and common infrared touch panel detection method are similar, are called the vertical scanning detection-phase; Continue to be scanned up to other half period, when this infrared emission component is lighted once more, its light that sends is received by another infrared receiver component that tilts relative with it and detects, infrared emission component is connected one by one and is lighted, the infrared receiver component relative with their inclinations receives detection one by one, and this process is called the dip sweeping detection-phase.At the vertical scanning detection-phase, the possible position data of each touch point when calculating the touch event generation, the area data at each place, touch point when the dip sweeping detection-phase calculates touch event and takes place is determined the accurate coordinate of each touch point according to the area data at the possible position data of each touch point and place.
This scheme can solve the problem that multiple point touching can't be discerned, but detect owing to need carry out vertical scanning earlier to the detection processing of touch event, carrying out dip sweeping again detects, need two scan periods just can finish, required time is long, causes the refresh rate of infrared touch system to reduce, and it is slack-off that the impression of giving the user is exactly the multiple point touching response, write or touch operation appearance delay, allow man-machine interaction lose promptness and convenience in some application scenario.
Summary of the invention
The object of the present invention is to provide a kind of energy to improve the infrared multi-point touch system of touch refresh rate and the method for location thereof.
First kind of technical scheme of the present invention is: a kind of infrared multi-point touch system, comprise coordinate detecting unit and auxiliary detection unit, described coordinate detecting unit comprises two groups over against the infrared transmitting tube and the infrared receiving tube that are provided with, and these two groups of infrared transmitting tubes and infrared receiving tube are formed the vertical scanning infrared array in the horizontal and vertical directions;
The stacked display screen front that is arranged on of described auxiliary detection unit and described coordinate detecting unit, described auxiliary detection unit comprises at least one group of tilt relative infrared transmitting tube and infrared receiving tube, this at least one group tilt relative infrared transmitting tube and infrared receiving tube composition dip sweeping infrared array;
Described auxiliary detection unit and described coordinate detecting unit carry out synchronous scanning according to the scan synchronizing signal that receives to described display screen respectively and detect; Described coordinate detecting unit calculates the possible position data of each touch point according to its scanning detecting result, and described auxiliary detection unit calculates the area data at each place, touch point according to its scanning detecting result.
Corresponding to the infrared multi-point touch system of first kind of technical scheme, the method for infrared multi-point touch system of the present invention location comprises step:
Described auxiliary detection unit and described coordinate detecting unit receive scan synchronizing signal respectively;
Described coordinate detecting unit and described auxiliary detection unit carry out synchronous scanning according to described scan synchronizing signal to display screen respectively and detect; Described coordinate detecting unit calculates the possible position data of each touch point according to its scanning detecting result, and described auxiliary detection unit calculates the area data at each place, touch point according to its scanning detecting result;
Determine the coordinate of each touch point according to the area data at the possible position data of each touch point and each place, touch point.
Second kind of technical scheme of the present invention is: a kind of infrared multi-point touch system, comprise coordinate detecting unit and auxiliary detection unit, described coordinate detecting unit comprises two groups over against the infrared transmitting tube and the infrared receiving tube that are provided with, and these two groups of infrared transmitting tubes and infrared receiving tube are formed the vertical scanning infrared array in the horizontal and vertical directions;
Also comprise main control unit, be connected with described coordinate detecting unit with described auxiliary detection unit respectively; The stacked display screen front that is arranged on of described auxiliary detection unit and described coordinate detecting unit, described auxiliary detection unit comprises at least one group of tilt relative infrared transmitting tube and infrared receiving tube, this at least one group tilt relative infrared transmitting tube and infrared receiving tube composition dip sweeping infrared array;
Described main control unit sends scan synchronizing signal to described auxiliary detection unit and described coordinate detecting unit respectively, and described auxiliary detection unit and described coordinate detecting unit carry out synchronous scanning according to the scan synchronizing signal that receives to described display screen respectively and detect; Described coordinate detecting unit calculates the possible position data of each touch point according to its scanning detecting result, and the possible position data of each touch point are sent to described main control unit; Described auxiliary detection unit calculates the area data at each place, touch point according to its scanning detecting result, and the area data at each place, touch point is sent to described main control unit; Described main control unit is determined the coordinate of each touch point according to the area data at the possible position data of each touch point and each place, touch point.
Corresponding to the infrared multi-point touch system of second kind of technical scheme, the method for infrared multi-point touch system of the present invention location comprises step:
Described main control unit sends scan synchronizing signal to described coordinate detecting unit and described auxiliary detection unit respectively;
Described coordinate detecting unit and described auxiliary detection unit carry out synchronous scanning according to described scan synchronizing signal to display screen respectively and detect; Described coordinate detecting unit calculates the possible position data of each touch point according to its scanning detecting result, and the possible position data of each touch point are sent to described main control unit; Described auxiliary detection unit calculates the area data at each place, touch point according to its scanning detecting result, and the area data at each place, touch point is sent to described main control unit;
Described main control unit is determined the coordinate of each touch point according to the area data at the possible position data at each place, touch point and each place, touch point.
The method of infrared multi-point touch system of the present invention and location thereof, described infrared multi-point touch system comprises coordinate detecting unit and auxiliary detection unit, they can carry out synchronous scanning to display screen according to the scan synchronizing signal that main control unit sends and detect, carrying out vertical scanning earlier than prior art detects, carry out the method that dip sweeping detects again, scan period can be shortened, can improve the refresh rate of infrared multi-point touch system of the present invention, the user experiences relatively good, improved the promptness and the convenience of man-machine interaction, more can adapt to of the requirement of large scale screen the multiple point touching location; And the present invention is simple in structure, and Installation and Debugging are convenient.
Description of drawings
Fig. 1 is an infrared multi-point touch system of the present invention structural representation in one embodiment;
Fig. 2 is an infrared multi-point touch system of the present invention structural representation in another embodiment;
Fig. 3 is an infrared multi-point touch system of the present invention sectional view in one embodiment;
Fig. 4 is an infrared multi-point touch system of the present invention sectional view in another embodiment;
Fig. 5 is the method process flow diagram in one embodiment of infrared multi-point touch system of the present invention location;
Fig. 6 is the method process flow diagram in another embodiment of infrared multi-point touch system of the present invention location.
Embodiment
The method of infrared multi-point touch system of the present invention and location thereof, described infrared multi-point touch system comprises coordinate detecting unit and auxiliary detection unit, they can carry out synchronous scanning to display screen according to the scan synchronizing signal that main control unit sends and detect, carrying out vertical scanning earlier than prior art detects, carry out the method that dip sweeping detects again, scan period can be shortened, can improve the refresh rate of infrared multi-point touch system of the present invention, the user experiences relatively good, improved the promptness and the convenience of man-machine interaction, more can adapt to of the requirement of large scale screen the multiple point touching location; And the present invention is simple in structure, and Installation and Debugging are convenient.
Below in conjunction with the drawings and specific embodiments the present invention is done a detailed elaboration.
Embodiment one
Infrared multi-point touch system of the present invention, as Fig. 1, comprise stacked coordinate detecting unit 101 and the auxiliary detection unit 102 that is arranged on the display screen, be coordinate detecting unit 101 be arranged on the auxiliary detection unit above, auxiliary detection unit 102 is arranged on the display screen, perhaps auxiliary detection unit 102 be arranged on coordinate detecting unit 101 above, coordinate detecting unit 101 is arranged on the display screen; Described coordinate detecting unit comprises two groups over against the infrared transmitting tube and the infrared receiving tube that are provided with, there is shown a group of infrared transmitting tube 204 and infrared receiving tube 203 being positioned on the horizontal direction, be positioned at one group of infrared transmitting tube 201 and infrared receiving tube 202 on the vertical direction, every group comprises five infrared transmitting tubes and five infrared receiving tubes, and these two groups of infrared transmitting tubes and infrared receiving tube are formed the vertical scanning infrared array in the horizontal and vertical directions; Described auxiliary detection unit comprises at least one group of tilt relative infrared transmitting tube and infrared receiving tube, this at least one group tilt relative infrared transmitting tube and infrared receiving tube composition dip sweeping infrared array, also show two groups of tilt relative infrared transmitting tube and infrared receiving tubes among the figure, be positioned at one group of infrared transmitting tube 205 and infrared receiving tube 206 on the horizontal direction, be positioned at one group of infrared transmitting tube 207 and infrared receiving tube 208 on the vertical direction, every group comprises three infrared transmitting tubes and three infrared receiving tubes.
Two groups of infrared transmitting tubes of coordinate detecting unit are arranged on the vertical and horizontal direction of display screen with infrared receiving tube, at least one group of relative infrared transmitting tube and the infrared receiving tube that tilt of auxiliary detection unit can be arranged on the horizontal direction of display screen, also can be arranged on the vertical direction of display screen, but the dip sweeping infrared array that this auxiliary detection unit is formed becomes certain angle of inclination with the vertical scanning infrared array that the coordinate detecting unit is formed.
Described coordinate detecting unit and auxiliary detection unit carry out synchronous scanning according to the scan synchronizing signal that receives to display screen respectively and detect, and scan synchronizing signal can be identical sweep time of an information or identical sweep frequency information; Coordinate detecting unit and auxiliary detection unit just can scan detection to display screen simultaneously according to scan synchronizing signal like this, can shorten sweep time, have improved the refresh rate of infrared multi-point touch system of the present invention.Certainly coordinate detecting unit and auxiliary detection unit can be preset identical sweep time of information or identical sweep frequency information respectively, like this coordinate detecting unit and auxiliary detection unit respectively according to preset identical sweep time information or identical sweep frequency information display screen is scanned detection.
Described coordinate detecting unit calculates the possible position data of each touch point according to its scanning detecting result, and described auxiliary detection unit calculates the area data at each place, touch point according to its scanning detecting result; Can determine the coordinate of each touch point according to the area data at the possible position data of each touch point and each place, touch point, determine according to the area data at the possible position data of each touch point and each place, touch point the method for the coordinate of each touch point specifically can application reference number be 200710031082.6, open day is formerly applying for a patent of on March 26th, 2008.
In a preferred embodiment, in order to reduce the possibility that pen takes place to connect multiple point touching, described coordinate detecting unit is about to the position that described coordinate detecting unit is arranged on close display screen between described display screen and described auxiliary detection unit.Described in addition auxiliary detection unit also can be between described display screen and described coordinate detecting unit, and promptly described auxiliary detection unit is arranged on the position near display screen.
In a preferred embodiment, for the possible position data that calculate each touch point accurately and the area data at each place, touch point, described auxiliary detection unit is parallel with described display screen respectively with described coordinate detecting unit.
In a preferred embodiment, in order to save installing space, avoid the phase mutual interference between coordinate detecting unit and the auxiliary detection unit, the infrared transmitting tube of the infrared transmitting tube of described auxiliary detection unit and/or infrared receiving tube and described coordinate detecting unit and/or infrared receiving tube are installed in the two sides of same circuit board, perhaps convenient for Installation and Debugging, reduce the difficulty of system debug, the infrared transmitting tube and/or the infrared receiving tube of described auxiliary detection unit are installed on the first circuit board, and the infrared transmitting tube and/or the infrared receiving tube of described coordinate detecting unit are installed on the second circuit board.
As Fig. 3, the infrared receiving tube 203 of coordinate detecting unit and the infrared transmitting tube 205 of auxiliary detection unit are installed on the circuit board A, and the infrared transmitting tube 204 of coordinate detecting unit and the infrared receiving tube 206 of auxiliary detection unit are installed on the circuit board B.As Fig. 4, the infrared receiving tube 203 of coordinate detecting unit is installed on the circuit board D, the infrared transmitting tube 205 of auxiliary detection unit is installed on the circuit board C, the infrared transmitting tube 204 of coordinate detecting unit is installed on the circuit board G, the infrared receiving tube 206 of auxiliary detection unit is installed on the circuit board F, circuit board C is fixedlyed connected by supporter E with circuit board D, and circuit board F is fixedlyed connected by supporter H with circuit board G.
In a preferred embodiment, disturb for fear of the signal between the infrared transmitting tube of the infrared transmitting tube of coordinate detecting unit and auxiliary detection unit, perhaps disturb for fear of the signal between the infrared receiving tube of the infrared receiving tube of coordinate detecting unit and auxiliary detection unit, the infrared transmitting tube of described auxiliary detection unit and the infrared receiving tube of described coordinate detecting unit are located at an end of described display screen, and the infrared receiving tube of described auxiliary detection unit and the infrared transmitting tube of described coordinate detecting unit are located at the other end of described display screen.As shown in Figure 3, the infrared receiving tube 203 of coordinate detecting unit and the infrared transmitting tube 205 of auxiliary detection unit are installed on the circuit board A, are positioned at an end of described display screen; The infrared transmitting tube 204 of coordinate detecting unit and the infrared receiving tube 206 of auxiliary detection unit are installed on the circuit board B, are positioned at the other end of described display screen.
Certainly in quarantine measures preferably under the situation, the infrared transmitting tube of described auxiliary detection unit and the infrared transmitting tube of described coordinate detecting unit also can be located at an end of described display screen, and the infrared receiving tube of described auxiliary detection unit and the infrared receiving tube of described coordinate detecting unit are located at the other end of described display screen.
Corresponding to the infrared multi-point touch system of the invention described above, the method for infrared multi-point touch system of the present invention location among this embodiment as Fig. 5, can comprise step:
S101, described auxiliary detection unit and described coordinate detecting unit receive scan synchronizing signal respectively.
S102, described coordinate detecting unit and described auxiliary detection unit carry out synchronous scanning according to described scan synchronizing signal to display screen respectively and detect.This scan synchronizing signal can be identical sweep time of an information or identical sweep frequency information, described coordinate detecting unit and described auxiliary detection unit can scan detection to display screen simultaneously according to this scan synchronizing signal, the method that can detect than available technology adopting elder generation vertical scanning like this, rear-inclined scanning detects exceeds 1 times refresh rate, can obviously improve the phenomenon that the multiple touch points low-response has time-delay.
S103, described coordinate detecting unit calculate the possible position data of each touch point according to its scanning detecting result, and described auxiliary detection unit calculates the area data at each place, touch point according to its scanning detecting result.
S104, main control unit determine the coordinate of each touch point according to the area data at the possible position data of each touch point and each place, touch point.Described main control unit determine according to the area data at the possible position data of each touch point and each place, touch point the method for the coordinate of each touch point specifically can application reference number be 200710031082.6, open day is formerly applying for a patent of on March 26th, 2008.
Embodiment two
What this embodiment and embodiment one were different is, infrared multi-point touch system of the present invention in this embodiment also comprises the main control unit 103 that is connected respectively with coordinate detecting unit and auxiliary detection unit, as Fig. 2, described main control unit 103 sends scan synchronizing signal to described auxiliary detection unit 102 and described coordinate detecting unit 101 respectively, and described auxiliary detection unit 102 and described coordinate detecting unit 101 carry out synchronous scanning according to the scan synchronizing signal that receives to described display screen respectively and detect; Described coordinate detecting unit 101 calculates the possible position data of each touch point according to its scanning detecting result, and the possible position data of each touch point are sent to described main control unit 103; Described auxiliary detection unit 102 calculates the area data at each place, touch point according to its scanning detecting result, and the area data at each place, touch point is sent to described main control unit 103; Described main control unit 103 is determined the coordinate of each touch point according to the area data at the possible position data of each touch point and each place, touch point.Main control unit 103 can be microcomputer system or central processing unit CPU.
Among this embodiment, under the control of main control unit 103, auxiliary detection unit 102 and coordinate detecting unit 101 scan detection to display screen synchronously, can carry out the method that vertical scanning detects, laggard line tilt scanning detects earlier than available technology adopting like this and exceed 1 times refresh rate, can obviously improve the phenomenon that the multiple touch points low-response has time-delay.
Corresponding to the infrared multi-point touch system of the invention described above, the method for infrared multi-point touch system of the present invention location among this embodiment as Fig. 6, can comprise step:
S201, described main control unit send scan synchronizing signal to described coordinate detecting unit and described auxiliary detection unit respectively.
S202, described coordinate detecting unit and described auxiliary detection unit carry out synchronous scanning according to described scan synchronizing signal to display screen respectively and detect.This scan synchronizing signal can be identical sweep time of an information or identical sweep frequency information, described coordinate detecting unit and described auxiliary detection unit can scan detection to display screen simultaneously according to this scan synchronizing signal, the method that can detect than available technology adopting elder generation vertical scanning like this, rear-inclined scanning detects exceeds 1 times refresh rate, can obviously improve the phenomenon that the multiple touch points low-response has time-delay.
S203, described coordinate detecting unit calculate the possible position data of each touch point according to its scanning detecting result, and the possible position data of each touch point are sent to described main control unit.
S204, described auxiliary detection unit calculate the area data at each place, touch point according to its scanning detecting result, and the area data at each place, touch point is sent to described main control unit.
S205, described main control unit determine the coordinate of each touch point according to the area data at the possible position data at each place, touch point and each place, touch point.Described main control unit determine according to the area data at the possible position data of each touch point and each place, touch point the method for the coordinate of each touch point specifically can application reference number be 200710031082.6, open day is formerly applying for a patent of on March 26th, 2008.
In sum, the method of infrared multi-point touch system of the present invention and location thereof, described infrared multi-point touch system comprises coordinate detecting unit and auxiliary detection unit, they can carry out synchronous scanning to display screen according to the scan synchronizing signal that main control unit sends and detect, carrying out vertical scanning earlier than prior art detects, carry out the method that dip sweeping detects again, scan period can be shortened, can improve the refresh rate of infrared multi-point touch system of the present invention, the user experiences relatively good, improved the promptness and the convenience of man-machine interaction, more can adapt to of the requirement of large scale screen the multiple point touching location; And the present invention is simple in structure, and Installation and Debugging are convenient.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (10)
1. infrared multi-point touch system, comprise coordinate detecting unit and auxiliary detection unit, described coordinate detecting unit comprises two groups over against the infrared transmitting tube and the infrared receiving tube that are provided with, and these two groups of infrared transmitting tubes and infrared receiving tube are formed the vertical scanning infrared array in the horizontal and vertical directions; Described auxiliary detection unit comprises at least one group of tilt relative infrared transmitting tube and infrared receiving tube, this at least one group tilt relative infrared transmitting tube and infrared receiving tube composition dip sweeping infrared array;
It is characterized in that: described auxiliary detection unit and stacked being arranged on the display screen of described coordinate detecting unit, and the dip sweeping infrared array that the auxiliary detection unit is formed becomes certain angle of inclination with the vertical scanning infrared array that the coordinate detecting unit is formed;
Described auxiliary detection unit and described coordinate detecting unit carry out synchronous scanning according to the scan synchronizing signal that receives to described display screen respectively and detect; Described coordinate detecting unit calculates the possible position data of each touch point according to the scanning detecting result of described coordinate detecting unit, and described auxiliary detection unit calculates the area data at each place, touch point according to the scanning detecting result of described auxiliary detection unit.
2. infrared multi-point touch system according to claim 1 is characterized in that: described coordinate detecting unit is between described display screen and described auxiliary detection unit.
3. infrared multi-point touch system according to claim 1 and 2 is characterized in that: described auxiliary detection unit is parallel with described display screen respectively with described coordinate detecting unit.
4. infrared multi-point touch system according to claim 3, it is characterized in that: the infrared transmitting tube of the infrared transmitting tube of described auxiliary detection unit and/or infrared receiving tube and described coordinate detecting unit and/or infrared receiving tube are installed in the two sides of same circuit board, the infrared transmitting tube and/or the infrared receiving tube of perhaps described auxiliary detection unit are installed on the first circuit board, and the infrared transmitting tube and/or the infrared receiving tube of described coordinate detecting unit are installed on the second circuit board.
5. infrared multi-point touch system according to claim 1 and 2, it is characterized in that: the infrared transmitting tube of described auxiliary detection unit and the infrared receiving tube of described coordinate detecting unit are positioned at an end of described display screen, and the infrared receiving tube of described auxiliary detection unit and the infrared transmitting tube of described coordinate detecting unit are located at the other end of described display screen.
6. infrared multi-point touch system, comprise coordinate detecting unit and auxiliary detection unit, described coordinate detecting unit comprises two groups over against the infrared transmitting tube and the infrared receiving tube that are provided with, and these two groups of infrared transmitting tubes and infrared receiving tube are formed the vertical scanning infrared array in the horizontal and vertical directions; Described auxiliary detection unit comprises at least one group of tilt relative infrared transmitting tube and infrared receiving tube, this at least one group tilt relative infrared transmitting tube and infrared receiving tube composition dip sweeping infrared array;
It is characterized in that: also comprise main control unit, be connected with described coordinate detecting unit with described auxiliary detection unit respectively; Described auxiliary detection unit and stacked being arranged on the display screen of described coordinate detecting unit, and the dip sweeping infrared array that the auxiliary detection unit is formed becomes certain angle of inclination with the vertical scanning infrared array that the coordinate detecting unit is formed;
Described main control unit sends scan synchronizing signal to described auxiliary detection unit and described coordinate detecting unit respectively, and described auxiliary detection unit and described coordinate detecting unit carry out synchronous scanning according to the scan synchronizing signal that receives to described display screen respectively and detect; Described coordinate detecting unit calculates the possible position data of each touch point according to the scanning detecting result of described coordinate detecting unit, and the possible position data of each touch point are sent to described main control unit; Described auxiliary detection unit calculates the area data at each place, touch point according to the scanning detecting result of described auxiliary detection unit, and the area data at each place, touch point is sent to described main control unit; Described main control unit is determined the coordinate of each touch point according to the area data at the possible position data of each touch point and each place, touch point.
7. infrared multi-point touch system according to claim 6 is characterized in that: described coordinate detecting unit is between described display screen and described auxiliary detection unit.
8. according to claim 6 or 7 described infrared multi-point touch systems, it is characterized in that: the infrared transmitting tube of the infrared transmitting tube of described auxiliary detection unit and/or infrared receiving tube and described coordinate detecting unit and/or infrared receiving tube are installed in the two sides of same circuit board, the infrared transmitting tube and/or the infrared receiving tube of perhaps described auxiliary detection unit are installed on the first circuit board, and the infrared transmitting tube and/or the infrared receiving tube of described coordinate detecting unit are installed on the second circuit board.
9. the method for an infrared multi-point touch system as claimed in claim 1 or 2 location is characterized in that, comprises step:
Auxiliary detection unit and coordinate detecting unit receive scan synchronizing signal respectively;
Described coordinate detecting unit and described auxiliary detection unit carry out synchronous scanning according to described scan synchronizing signal to display screen respectively and detect; Described coordinate detecting unit calculates the possible position data of each touch point according to the scanning detecting result of described coordinate detecting unit, and described auxiliary detection unit calculates the area data at each place, touch point according to the scanning detecting result of described auxiliary detection unit;
Determine the coordinate of each touch point according to the area data at the possible position data of each touch point and each place, touch point.
10. the method as claim 6 or 7 described infrared multi-point touch system location is characterized in that, comprises step:
Described main control unit sends scan synchronizing signal to described coordinate detecting unit and described auxiliary detection unit respectively;
Described coordinate detecting unit and described auxiliary detection unit carry out synchronous scanning according to described scan synchronizing signal to display screen respectively and detect; Described coordinate detecting unit calculates the possible position data of each touch point according to the scanning detecting result of described coordinate detecting unit, and the possible position data of each touch point are sent to described main control unit; Described auxiliary detection unit calculates the area data at each place, touch point according to the scanning detecting result of described auxiliary detection unit, and the area data at each place, touch point is sent to described main control unit;
Described main control unit is determined the coordinate of each touch point according to the area data at the possible position data at each place, touch point and each place, touch point.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105733A (en) * | 2007-05-16 | 2008-01-16 | 广东威创日新电子有限公司 | Multiple point touch localization method |
| CN101110008A (en) * | 2007-07-25 | 2008-01-23 | 广东威创日新电子有限公司 | Touch panel device and multi-point touch locating method |
| CN101149656A (en) * | 2007-10-26 | 2008-03-26 | 广东威创视讯科技股份有限公司 | Infra red touch screen and multiple point touching positioning method |
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