CN101968699A - Infrared touch screen positioning device and method - Google Patents
Infrared touch screen positioning device and method Download PDFInfo
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- CN101968699A CN101968699A CN 201010253644 CN201010253644A CN101968699A CN 101968699 A CN101968699 A CN 101968699A CN 201010253644 CN201010253644 CN 201010253644 CN 201010253644 A CN201010253644 A CN 201010253644A CN 101968699 A CN101968699 A CN 101968699A
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Abstract
The invention relates to an infrared touch screen positioning device and an infrared touch screen positioning method. The infrared touch screen positioning device comprises infrared transmitting modules, infrared receiving modules, a master control module and host equipment, wherein the infrared transmitting modules and the infrared receiving modules are arranged on a touch screen; the master control module is used for controlling the work of the infrared transmitting modules and the infrared receiving modules; the infrared transmitting modules are distributed at corners or on the edges of the touch screen, transmit infrared signals in at least two directions and cover all infrared receiving modules; the infrared receiving modules are distributed on at least three sides of the touch screen and are used for detecting the infrared signals transmitted by the infrared transmitting modules; the infrared transmitting modules and the infrared receiving modules synchronously work; and the master control module is provided with an external communication interface, finishes all infrared scanning processes and transmits touch data to the host equipment. By establishing a plurality of segments between the infrared transmitting modules and a shielding position and calculating the points of intersection of segments established by different infrared transmitting modules, the coordinate of a touch object is obtained.
Description
Technical field
The present invention relates to the touch screen technology field, particularly a kind of infrared touch panel locating device and localization method.
Background technology
Touch-screen is as a kind of novel computer entry device, make man-machine interaction more directly perceived, owing to the greatly convenience that brings to the user, touch screen technology is except being applied to the portable personal information products, and application has spreaded all over every field such as information household appliances, public information, electronic game, business automation equipment.Infrared touch screen device of the prior art, usually all have infrared emission, receiving tube on the both direction, two-way infrared emission, receiving tube are formed a plane of orientation jointly, scan successively and horizontal and vertically go up whether the infrared signal variation that is blocked is arranged between all infrared tubes, according to blocking the coordinate that touch objects is calculated in the position, this touch system realizes that anti-interference is good easily, but the number of the infrared emission of using, receiving tube is many; Also has camera detection and location system in the existing touching technique, it adopts and in a plurality of corners of display device camera is installed, and is furnished with infrared light supply, and reflecting strips all around, convert angle information to by the position of taking touch objects in camera head, further converting to the camera head is many rays that set out in the center, and the intersection point of many rays is touch article coordinate, but this detection and location system hardware system is comparatively complicated, and anti-interference is not as infrared touch system.
Summary of the invention
Infrared touch panel locating device and the localization method that number is less, response speed is fast, reliability is high and easier realization multiple point touching detects that the purpose of this invention is to provide a kind of infrared emission simple in structure, employed and receiving tube.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of infrared touch panel locating device, comprise infrared transmission module, the infrared receiving module that is arranged on the touch-screen and be used to control the main control module of infrared transmission module, infrared receiving module work, described infrared transmission module is distributed in the corner or the edge of touch-screen, at least launch infrared signal with both direction, and cover all infrared receiving modules; Described infrared receiving module is distributed on three limits of touch-screen at least, in order to detect the infrared signal that infrared transmission module is launched; Described infrared transmission module, infrared receiving module synchronous working; Described main control module is provided with external communication interface, and the main control module is finished all infrared scan processes, and sends touch data to main process equipment.
Described main control module directly links to each other with infrared transmission module with infrared receiving module.
Described main control module links to each other by the controller on being installed in infrared transmission module and receiving receiver module with infrared transmission module with infrared receiving module.
Described infrared transmission module comprises first infrared transmission module and second infrared transmission module in two corners, one side that are distributed in touch-screen, infrared receiving module is distributed in first infrared receiving module, second infrared receiving module and the 3rd infrared receiving module on other three limits of touch-screen, the infrared signal of first infrared transmission module emission is detected by second infrared receiving module and the 3rd infrared receiving module and receives, and the infrared signal of second infrared transmission module emission is detected by first infrared receiving module, second infrared receiving module and receives.
Described first infrared transmission module and second infrared transmission module) form greater than power valve and the driving circuit thereof of 90/N greater than infrared transmitting tube or N emission angle of 90 degree by single emission angle respectively.
Described infrared transmission module comprises first infrared transmission module in two corners in one side and this limit that are distributed in touch-screen, second infrared transmission module) and the 3rd infrared transmission module, infrared receiving module is distributed in first infrared receiving module on other three limits of touch-screen, second infrared receiving module and the 3rd infrared receiving module, the infrared signal of first infrared transmission module emission is detected by second infrared receiving module and the 3rd infrared receiving module and receives, the infrared signal of second infrared transmission module emission is by first infrared receiving module, second infrared receiving module detects and receives, and the infrared signal of the 3rd infrared transmission module emission is by first infrared receiving module, second infrared receiving module and the 3rd infrared receiving module detect and receive.
Described first infrared transmission module and second infrared transmission module are made up of greater than power valve and the driving circuit thereof of 90/N greater than infrared transmitting tube or N emission angle of 90 degree single emission angle respectively, and described the 3rd infrared transmission module is that 180 infrared transmitting tube or N emission angles of spending are formed greater than infrared transmitting tube and the driving circuit thereof of 180/N by single emission angle.
The localization method of described infrared touch panel locating device: start infrared scan; Set up infrared transmission module to blocking a plurality of line segments that the position is formed; The intersection point that calculates the line segment of different infrared transmission modules foundation obtains touch article coordinate.
The localization method of described infrared touch panel locating device comprises the following steps:
Step 1: start first infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, and record; Start second infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, and record;
Step: 2: start first infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, whether have signal be blocked, record blocks the position, sets up the transmitter module position to one or more described line segment L1i that block the position if detecting;
Step 3: start second infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, whether have signal be blocked, record blocks the position, sets up the transmitter module position to one or more described line segment L2k that block the position if detecting;
Step 4: blocking if all detected in step 2 and the step 3, calculate the intersection point of described line segment L1i and L2k, promptly is actual touch article coordinate, is sent to main process equipment;
Step 5: jump to step 2 and detect again;
Wherein, step 2 and step 3 can be carried out by exchange sequence, also can carry out simultaneously, detect the method whether have signal to be blocked and be corresponding detected value contrast, then be judged as less than certain threshold value as if the current detection value and blocked record in the infrared signal value of current detection and the step 1.
The present invention with respect to the beneficial effect of prior art is:
1, reduce infrared transmission module, reduced hardware cost and system power dissipation, structure is more simple, easy for installation;
2, convenient single-point, the multiple point touching technology of realizing, response speed is fast, and reliable and stable.
Description of drawings
Fig. 1 is the structural representation of infrared touch panel locating device of the present invention;
Fig. 2 is the structure one of infrared transmission module of the present invention;
Fig. 3 is the structure two of infrared transmission module of the present invention;
Fig. 4 is the synoptic diagram of the present invention's emission when adopting the structure two of infrared transmission module;
Fig. 5 is the positioning principle synoptic diagram of infrared touch panel locating device of the present invention;
Fig. 6 is the multipoint positioning principle schematic of infrared touch panel locating device of the present invention;
Fig. 7 is the schematic flow sheet of the localization method of infrared touch panel locating device of the present invention.
Embodiment
The present invention is further detailed explanation by embodiment below in conjunction with accompanying drawing.
Referring to Fig. 1, infrared touch panel locating device of the present invention, comprise infrared transmission module 104,105, infrared receiving module 101,102,103 that is arranged on the touch-screen 1 and the main control module 107 that is used to control infrared transmission module, infrared receiving module work, wherein infrared transmission module is distributed in the lower left corner and the lower right corner of touch-screen 1, mode with bus links to each other with the main control module, and the infrared signal of emission covers all infrared receiving modules; Described infrared receiving module is distributed in touch-screen 1 left side, top and the right, and infrared receiving module is made up of several infrared receiving lines plates, links to each other with the main control module in the mode of bus, in order to detect the infrared signal that infrared transmission module is launched; Described infrared transmission module, infrared receiving module synchronous working; Described main control module is provided with external communication interface, and the main control module is finished all infrared scan processes, and sends touch data to main process equipment.
First infrared transmission module 104 and second infrared transmission module 105 are located at the lower left corner of touch-screen 1 respectively, the lower right corner, and first infrared receiving module 101, second infrared receiving module 102 and the 3rd infrared receiving module 103 are installed in the left side, top, the right, main control module 107 can be selected the installation site according to actual conditions, and main control module 107 is provided with the communication interface that can externally send touch data.First infrared transmission module 104 and second infrared transmission module 105 are made up of the infrared transmitting tube and the driving circuit of single wide-angle, also can adopt many infrared transmitting tubes to become certain radian to put, make the infrared signal of its emission cover corresponding infrared receiving module, and infrared receiving module is divided into a plurality of zones, cover different zones by different infrared transmitting tubes.Infrared receiving module is made up of the some infrared receiving tubes that are arranged in order.
The infrared signal of first infrared transmission module, 104 emissions is detected by second infrared receiving module 102 and the 3rd infrared receiving module 103 and receives, and the infrared signal of second infrared transmission module, 105 emissions is detected and received by first infrared receiving module 101, second infrared receiving module 102.Infrared receiving tube in the infrared transmission module in infrared transmitting tube and the infrared receiving module, all be to distinguish synchronous working, infrared tube is used for emission, and infrared tube is used for receiving, in order to detect on this a pair of infrared emission receiving tube corresponding scanning line whether shelter being arranged.Light the infrared transmitting tube in first infrared transmission module 104 during operate as normal, and detect in second infrared receiving module 102 and the 3rd infrared receiving module 103 signal on each infrared receiving tube successively at synchronization and change, with signal have or not or power has judged whether to block.And light second infrared transmission module 105, and scan the infrared receiving tube in first infrared receiving module 101, second infrared receiving module 102 with the method for sample.In a scan period, second infrared receiving module 102 and the 3rd infrared receiving module 103 have detected one time first infrared signal that infrared transmission module 104 is launched, first infrared receiving module 101, second infrared receiving module 102 have detected one time second infrared signal that infrared transmission module 105 is launched, and first infrared transmission module 104 and second infrared transmission module 105 are lighted when each pipe of infrared receiving module detects, close then to reduce power consumption, also can continue to light at corresponding receiver module duration of work.
Wherein first infrared transmission module 104 and second infrared transmission module 105 are respectively from both direction emission infrared signal, first infrared receiving module 101, second infrared receiving module 102 and the 3rd infrared receiving module 103 receive, and have formed the infrared scan network that interweaves thus.First infrared transmission module 104 and second infrared transmission module 105 are made up of the infrared transmitting tube and the driving circuit thereof of single wide-angle (greater than 90 degree) respectively, also can adopt a plurality of low-angles to form, if adopt N infrared transmitting tube, the emission angle of each power valve need satisfy greater than 90/N so, as Fig. 2, shown in Fig. 3, the angle of infrared transmitting tube is A in first infrared transmission module 104, after adopting two infrared transmitting tubes, as 1041,1042, its angle is respectively A1, A2, and 1041,1042 one-tenth certain radian are installed, increased the emission angle of transmitter module, second infrared receiving module 102 detects the infrared signal of 1041 emissions in Fig. 4, the 3rd infrared receiving module 103 detects the infrared signal of 1042 emissions, other second infrared receiving module 102 detects the infrared signal of 1051 emissions, and first infrared receiving module 101 detects the infrared signal of 1052 emissions.
Fig. 5 is the positioning principle figure of the inventive method, in a scan period, the infrared receiving tube number that infrared transmitting tube in the infrared transmission module is lighted in the infrared receiving module of number of times and its covering is identical, whether each infrared receiving tube all detects once and blocks, whether and the part infrared receiving module can receive two infrared transmission module infrared signals, all block in all directions so need to detect twice.Before touch panel device work of the present invention, need system is carried out initialization, start single pass, and the detected signal of infrared receiving tube this moment is all noted as reference value, as basis for estimation afterwards, after this can enter normal duty.Under the situation of touch-screen locating device operate as normal, if there is not the touch point, the detected signal of so all infrared receiving tubes all approaches signal criterion value separately or equates, when the touch point, the detected signal of the pairing infrared receiving tube in this touch point will differ bigger with the signal criterion value, when this phase difference was greater than or equal to predetermined value, promptly there was the touch point in decidable.As 601 being touch points among Fig. 6, the infrared signal of first infrared transmission module, 104 emissions is blocked, and the 3rd infrared receiving module 103 is in the process of scanning, 602 locational infrared receiving tube detected signals this moment and signal criterion value differ bigger, promptly be greater than or equal to predetermined value, main control module 107 will be noted the numbering of the infrared receiving tube that signal changes, and this numbering can further be converted into virtual positional information, and sets up the line segment L1 of this position to first infrared transmission module 104; This moment, the infrared signal of second infrared transmission module, 105 emissions also was blocked, and first infrared receiving module 101 is in the process of scanning, 601 locational infrared receiving tube detected signals this moment and signal criterion value differ bigger, promptly be greater than or equal to predetermined value, main control module 107 will be noted the numbering of the infrared receiving tube that signal changes, and this numbering can further be converted into virtual positional information, and sets up the line segment L2 of this position to second infrared transmission module 105; Calculate the intersection point of L1 and L2, position of intersecting point promptly is 603, just the coordinate of actual touch thing.
Fig. 6 is the multipoint positioning principle schematic of the infrared touching device of the embodiment of the invention, localization method according to the present invention is when a plurality of touch point occurring, on infrared receiving module, detect a plurality of positions of blocking, set up many according to the infrared transmission module on the both direction and block line segment, and can calculate touch point more than actual touch thing number, " terrible point " promptly occurred, this with traditional infrared touch technology type seemingly.So increase an infrared transmission module in the drawings is the 3rd infrared transmission module 106, the infrared signal that this infrared transmission module is launched need cover i.e. first infrared receiving module 101 of all infrared receiving modules, second infrared receiving module 102 and the 3rd infrared receiving module 103, if adopt single infrared transmitting tube, the angle of the infrared transmitting tube of the 3rd infrared transmission module 106 must be 180 degree so, perhaps adopt optical processing (as lens etc.) that its emission angle is expanded to 180 degree, or adopt above-mentioned mention become radian to put with a plurality of low-angle infrared transmitting tubes, to reach the purpose of expanded-angle.
702,704 is two touch points among the figure, in the touch-screen scanning process, when first infrared transmission module, 104 emission infrared signals, second infrared receiving module 102 and the 3rd infrared receiving module 103 detect and receive infrared signal, detecting infrared signal at 1041,1042 places respectively is blocked, set up two line segment L1 of first infrared transmission module 104 to 1041 and 1042, L2; When second infrared transmission module, 105 emission infrared signals, first infrared receiving module 101, second infrared receiving module 102 detects and receives infrared signal, respectively 1051,1052 places detect infrared signal and are blocked, set up two line segment L3 of second infrared transmission module 105 to 1051 and 1052, L4, when the 3rd infrared transmission module 106 emission infrared signals, first infrared receiving module 101, second infrared receiving module 102 and the 3rd infrared receiving module 103 detect and receive infrared signal, respectively 1061,1062 places detect infrared signal and are blocked, set up the 3rd infrared transmission module 106 to 1061, two line segment L5 of 1062, L6, according to localization method of the present invention, calculate line segment L1, L2 and line segment L3, intersection point between L4, obtain 701 respectively, 702,703,704, blocked line segment L5 according to what the 3rd infrared transmission module 106 produced again, L6 judges, have only 702,704 respectively on these two line segments, and the real touch point of final decision is 702,704.In these computing method, also can be according to the intersection point between line segment L1, L2, L3, L4 and line segment L5, L6, obtain maximum 8 intersection points respectively, real touch point necessarily can be blocked the infrared signal of launching on all directions, when the generation line segment on all directions all intersects on same point, this intersection point is actual touch point, in Fig. 7, has only 702,704 to be respectively the intersection point of three line segments.So can get rid of other 6 " terrible points ".
Wherein arbitrary position on other limits can also be selected in the position of the 3rd infrared transmission module 106, can be placed on the upper left corner or the upper right corner, in this scheme, must around place infrared receiving module, to receive the infrared signal of launching on all angles, can not occur " terrible point " in coordinate Calculation, the use of multiple point touching is more reliable.
Touch-screen locating device of the present invention utilizes a spot of infrared transmission module, and the infrared receiving module of periphery has been formed the infrared scan network, by setting up infrared transmission module to blocking a plurality of line segments that the position is formed, the intersection point that calculates the line segment of different infrared transmission modules foundation obtains touch article coordinate, the convenient single-point touches technology that realizes, also can realize multiple point touching by the method that software track is handled, also can realize so many some touching technique by increasing at least one infrared transmission module, simple in structure, response speed is fast and reliability is high.
Referring to shown in Figure 7, be the schematic flow sheet of the localization method of touch-screen locating device of the present invention, as shown in the figure, localization method of the present invention comprises step;
S101: start one time infrared scan, the detected signal strength values of each infrared receiving tube under the record current state, specifically:
Start first infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, and record; Start second infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, and record;
S102: start first infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, whether have signal be blocked, record blocks the position, sets up the transmitter module position to one or more described line segment L1i that block the position if detecting;
S103: start second infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, whether have signal be blocked, record blocks the position, sets up the transmitter module position to one or more described line segment L2k that block the position if detecting;
S104: blocking if all detected among S102 and the S103, calculate the intersection point of described line segment L1i and L2k, promptly is actual touch article coordinate, is sent to main process equipment;
S105: jump to S102 and detect again;
Wherein, S102 and S103 can carry out by exchange sequence, also can carry out simultaneously.Detect the method whether have signal to be blocked and be the corresponding detected value contrast of will write down among the infrared signal value of current detection and the S101, then be judged as less than certain threshold value as if the current detection value and blocked.
Claims (9)
1. infrared touch panel locating device, comprise the main control module that is arranged on infrared transmission module, the infrared receiving module on the touch-screen (1) and is used to control infrared transmission module, infrared receiving module work, it is characterized in that: described infrared transmission module is distributed in the corner or the edge of touch-screen (1), at least launch infrared signal with both direction, and cover all infrared receiving modules; Described infrared receiving module is distributed on three limits of touch-screen (1) at least, in order to detect the infrared signal that infrared transmission module is launched; Described infrared transmission module, infrared receiving module synchronous working; Described main control module is provided with external communication interface, and the main control module is finished all infrared scan processes, and sends touch data to main process equipment.
2. infrared touch panel locating device according to claim 1 is characterized in that: described main control module directly links to each other with infrared transmission module with infrared receiving module.
3. infrared touch panel locating device according to claim 1 is characterized in that: described main control module links to each other by the controller on being installed in infrared transmission module and receiving receiver module with infrared transmission module with infrared receiving module.
4. infrared touch panel locating device according to claim 1, it is characterized in that: described infrared transmission module comprises first infrared transmission module (104) and second infrared transmission module (105) in two corners, one side that are distributed in touch-screen (1), infrared receiving module is distributed in first infrared receiving module (101) on other three limits of touch-screen (1), second infrared receiving module (102) and the 3rd infrared receiving module (103), the infrared signal of first infrared transmission module (104) emission is detected by second infrared receiving module (102) and the 3rd infrared receiving module (103) and receives, and the infrared signal of second infrared transmission module (105) emission is by first infrared receiving module (101), second infrared receiving module (102) detects and receives.
5. infrared touch panel locating device according to claim 4 is characterized in that: described first infrared transmission module (104) and second infrared transmission module (105) are made up of greater than power valve and the driving circuit thereof of 90/N greater than infrared transmitting tube or N emission angle of 90 degree single emission angle respectively.
6. infrared touch panel locating device according to claim 1, it is characterized in that: described infrared transmission module comprises first infrared transmission module (104) in two corners in one side and this limit that are distributed in touch-screen (1), second infrared transmission module (105) and the 3rd infrared transmission module (106), infrared receiving module is distributed in first infrared receiving module (101) on other three limits of touch-screen (1), second infrared receiving module (102) and the 3rd infrared receiving module (103), the infrared signal of first infrared transmission module (104) emission is detected by second infrared receiving module (102) and the 3rd infrared receiving module (103) and receives, the infrared signal of second infrared transmission module (105) emission is by first infrared receiving module (101), second infrared receiving module (102) detects and receives, and the infrared signal of the 3rd infrared transmission module (106) emission is by first infrared receiving module (101), second infrared receiving module (102) and the 3rd infrared receiving module (103) detect and receive.
7. infrared touch panel locating device according to claim 6, it is characterized in that: described first infrared transmission module (104) and second infrared transmission module (105) are made up of greater than power valve and the driving circuit thereof of 90/N greater than infrared transmitting tube or N emission angle of 90 degree single emission angle respectively, and described the 3rd infrared transmission module (106) is that 180 infrared transmitting tube or N emission angles of spending are formed greater than infrared transmitting tube and the driving circuit thereof of 180/N by single emission angle.
8. the localization method of an infrared touch panel locating device according to claim 1 is characterized in that: start infrared scan; Set up infrared transmission module to blocking a plurality of line segments that the position is formed; The intersection point that calculates the line segment of different infrared transmission modules foundation obtains touch article coordinate.
9. the localization method of infrared touch panel locating device according to claim 8 is characterized in that: comprise the following steps:
Step 1: start first infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, and record; Start second infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, and record;
Step: 2: start first infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, whether have signal be blocked, record blocks the position, sets up the transmitter module position to one or more described line segment L1i that block the position if detecting;
Step 3: start second infrared transmission module, detect the infrared signal that all infrared receiving modules are received in its coverage, whether have signal be blocked, record blocks the position, sets up the transmitter module position to one or more described line segment L2k that block the position if detecting;
Step 4: blocking if all detected in step 2 and the step 3, calculate the intersection point of described line segment L1i and L2k, promptly is actual touch article coordinate, is sent to main process equipment;
Step 5: jump to step 2 and detect again;
Wherein, step 2 and step 3 can be carried out by exchange sequence, also can carry out simultaneously, detect the method whether have signal to be blocked and be corresponding detected value contrast, then be judged as less than certain threshold value as if the current detection value and blocked record in the infrared signal value of current detection and the step 1.
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| CN 201010253644 CN101968699B (en) | 2010-08-13 | 2010-08-13 | Infrared touch screen positioning device and method |
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| CN105955551A (en) * | 2016-04-28 | 2016-09-21 | 深圳市创维群欣安防科技股份有限公司 | Infrared touch screen scanning method and device |
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| CN111813273A (en) * | 2020-06-19 | 2020-10-23 | 深圳市鸿合创新信息技术有限责任公司 | Touch point coordinate calculation method of infrared touch screen and infrared touch screen |
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| CN102799315A (en) * | 2011-05-24 | 2012-11-28 | 程抒一 | Infrared touch screen accurate erasing system |
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| CN106484194A (en) * | 2015-08-26 | 2017-03-08 | 上海精研电子科技有限公司 | A kind of infrared touch panel multipoint positioning method |
| CN106484194B (en) * | 2015-08-26 | 2019-10-29 | 上海精研电子科技有限公司 | A kind of infrared touch panel multipoint positioning method |
| CN105955551A (en) * | 2016-04-28 | 2016-09-21 | 深圳市创维群欣安防科技股份有限公司 | Infrared touch screen scanning method and device |
| CN105955551B (en) * | 2016-04-28 | 2019-01-01 | 深圳市创维群欣安防科技股份有限公司 | The scan method and device of infrared touch panel |
| CN111813273A (en) * | 2020-06-19 | 2020-10-23 | 深圳市鸿合创新信息技术有限责任公司 | Touch point coordinate calculation method of infrared touch screen and infrared touch screen |
| CN113671590A (en) * | 2021-07-01 | 2021-11-19 | 浙江大华技术股份有限公司 | Infrared sensor and infrared sensing system |
| CN113671590B (en) * | 2021-07-01 | 2024-03-26 | 浙江大华技术股份有限公司 | Infrared sensor and infrared sensing system |
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