CN100552607C - A kind of new infrared touching device - Google Patents
A kind of new infrared touching device Download PDFInfo
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- CN100552607C CN100552607C CNB200610037391XA CN200610037391A CN100552607C CN 100552607 C CN100552607 C CN 100552607C CN B200610037391X A CNB200610037391X A CN B200610037391XA CN 200610037391 A CN200610037391 A CN 200610037391A CN 100552607 C CN100552607 C CN 100552607C
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Abstract
The invention discloses a kind of new infrared touching device, it is included in vertical, one or more groups transmitter module and the receiver module arranged on the transverse direction, link to each other by synchronous signal line between each transmitter module, link to each other with bus by synchronous signal line between each receiver module, described each receiver module and transmitter module are by controlling from microprocessor, linking to each other with master microprocessor by synchronous signal line of this transmitter module from microprocessor, linking to each other with master microprocessor with synchronous signal line of this receiver module from microprocessor through bus, wherein corresponding a pair of emission, receiver module is to adopting the identical infrared emission of frequency, receiving tube, adjacent transmitter module, receiver module is to adopting the different infrared emission of frequency, receiving tube.This new infrared touching device strong interference immunity, processing speed be fast, be applicable to the giant-screen location.
Description
[technical field]
The present invention relates to a kind of infrared location technology and equipment, particularly relates to a kind of electronic display unit or other writing planes of being applied to and carries out the infrared touching device that handwriting trace is caught and reappeared.
[background technology]
The electronic touch technology provides great convenience to man-machine interaction mode, technically also provides multiple solution, and Performance And Reliability is also constantly perfect.Common in the market have a dual mode: a kind of is passive mode, utilizes resistance, electric capacity, infrared scan technology, and characteristics are the captured objects that need not promptly to can be used as through the pen of special processing locating device; Another is an active mode, and as electromagnetic location, ultrasonic locating, this mode need could be used through the electronic pen of special facture, in case pen is lost or damaged, whole positioning system cannot be worked.Along with the continuous development of touching technique, the infrared scan location technology has its special advantages, for example compares with resistance, electric capacity location, can accomplish light transmission completely, wearing quality; Compare with the electromagnetic location technology, infrared location technology need not to use special electronic pen, and is easy to use; In addition, infrared location technology can also be produced the large scale touch-screen very easily, can be applicable to rear-projection TV, front projection machine, or in the PDP/LCD display device, in prelocalization, because the complete light transmission of infrared location, other several location technologies can't be compared.Though infrared location technology has many advantages and since the size restrictions of infrared tube the raising of resolution, infrared transmitting tube has a fixing emission angle, can interfere with each other between infrared tube; Reflection of light causes writing thing can not block infrared light path; The touch-screen refresh rate of large scale infrared technology is slow; Adopt traditional treatment technology, infrared location technology can only be used for undersized touch-screen and the low occasion of positioning accuracy request, the requirement that does not reach handwriting far away.In order to catch effect in range of application and the location of expanding infrared location technology, all done a large amount of research both at home and abroad, introduced the way that improves infrared touching device resolution as domestic 03113702.4, what wherein relate to only is a kind of theoretic mathematical model, do not consider the particular problem of infrared touching device, can not form the product of a success.
Existing infrared positioning touch device has added light-conductive hole for improving anti-interference at screen edge, be illustrated in figure 1 as the synoptic diagram that infrared tube and light-conductive hole are aimed at one by one, light-conductive hole is the housing with the frame one, infrared transmitting tube and receiving tube are aimed at light-conductive hole can suppress interference between infrared tube, but on technology, accomplish infrared emission and receiving tube are aimed at one by one with light-conductive hole, increased producting process difficulty.
Fig. 2 is existing infrared positioning touch device structure and light path synoptic diagram, because infrared transmitting tube has certain emission angle β, the transmitting boundary of power valve can cover the infrared receiving tube of adjacent reception module, so existing infrared positioning touch device anti-interference is very poor, to illustrate three pairs of emissions on the directions X in 2, the m infrared tube of receiver module is an example, adopt scan method as shown in Figure 3, the infrared light of the m infrared transmitting tube of X_SND2 (transmitter module 2) emission can be by X_RCV1 in the diagram 2, X_RCV2, X_RCV3 ( receiver module 1,2,3) receiver module receives with the m infrared receiving tube of numbering.When shelter during in shelter 2 positions, the light that shelter blocks can have influence on the receiving tube m of X_RCV1, X_RCV2, X_RCV3 simultaneously, thereby receiver module X_RCV1, X_RCV2, X_RCV3 can detect block information simultaneously, on directions X, detect 3 simultaneously and block the position, in like manner also there is the problem that detects a plurality of block informations simultaneously on the Y direction, causes locating device can't judge the concrete position of blocking; Relate to the scanning of the infrared tube of One's name is legion in the infrared ray touching device, in large-sized infrared ray touching device, also relate to a plurality of microprocessors, communicating by letter between the scanning of finishing big quantity infrared tube and a plurality of microprocessors needs the plenty of time, adopt existing infrared positioning touch device structure and general its anti-interference of scan method very poor, and the general principal and subordinate who adopts calls the time of formula communication pattern cost oversize, has had a strong impact on the writing speed and the effect of infrared ray touching device; Infrared light is as a kind of form of light, the problem that has reflection, the light path 4 in 2 as shown is shown in the light path 5, in the reflecting surface emission that the infrared light of the infrared transmitting tube of infrared posting corner emission can form along infrared posting edge, cause and write object and in some zone, can't normally write; The infrared ray touching device is as a kind of touching technique, and requirement can provide various sizes, adopts traditional project organization, can't satisfy the requirement of flexible design various sizes.
Therefore, need provide a kind of simple in structure, high resolving power, high anti-interference, refresh rate fast, be applicable to the infrared touching device of giant-screen location.
[summary of the invention]
The purpose of this invention is to provide the infrared touching device that a kind of strong interference immunity, processing speed are fast, be applicable to the giant-screen location.
To achieve these goals, the present invention adopts following technical scheme:
Provide a kind of adjacent infrared module to adopt the new infrared touching device of varied-frequency infrared tube, it is included in one or more groups transmitter module and the receiver module of arranging on the longitudinal and transverse direction, link to each other by synchronous signal line between each transmitter module, link to each other with bus by synchronous signal line between each receiver module, described each receiver module and transmitter module are by controlling from microprocessor, this infrared positioning touch device also comprises a master microprocessor, this master microprocessor can with one of them from the shared microprocessor of microprocessor.Two or more transmitter modules can be shared one from microprocessor, two or more receiver modules also can be shared one from microprocessor.Linking to each other with master microprocessor by synchronous signal line of transmitter module from microprocessor, linking to each other with master microprocessor with synchronous signal line of receiver module from microprocessor through bus, benchmark synchronizing signal of this master microprocessor output give all transmitter modules from microprocessor and all receiver modules from microprocessor, and obtain the detected block information of each receiver module from bus, carry out touch location calculation, and result of calculation is sent to computing machine.Each receiver module adopt detected touch information or other Debugging message the work schedule mode of timesharing to pass to master microprocessor from the microprocessor through bus interface.
Wherein corresponding a pair of emission, receiver module are to adopting identical infrared emission, the receiving tube of frequency, adjacent transmitter module, receiver module are to adopting different infrared emission, the receiving tubes of frequency, for example one of them corresponding module is to adopting 850nm infrared emission, receiving tube, and adjacent modules is to adopting 940nm infrared emission, receiving tube; Same group of emission, receiver module centering can also be provided with infrared emission, the receiving tube of two or more different frequency, wherein corresponding a pair of infrared emission, reception are adopted identical frequency to pipe, and adjacent infrared emission, reception are to the different frequency of pipe employing.The infrared light of the infrared transmitting tube emission of the corresponding transmitter module same frequency that the infrared receiving tube of corresponding like this receiver module receives is very strong, and the infrared light that receives the emission of adjacent block different frequency infrared transmitting tube is very weak, adopt described technical scheme to avoid interfering with each other between the corresponding infrared tube of adjacent block, promptly can not detect a plurality of block informations simultaneously, improve the anti-interference of this infrared touching device greatly.
At least one end of at least one transmitting side of described infrared touching device and/or at least one receives the infrared tube biasing certain angle of at least one end on limit.For preventing that infrared light from forming reflection on the optical filter at four edges, the biasing of a plurality of infrared tubes on four angles of infrared ray positioning touch device certain angles preferably, preferred plan be according to 3-10 infrared tube on each angle of touching device of different size to screen center's certain angle of setovering, to screen center's biasing 5～10 degree for good.
On the frame at four edges, seizure plane of infrared touching device, the light transmission piece that prevents dust is installed.
Adopt the localization method works principle of above-mentioned infrared positioning apparatus as described below:
The capable array scanning of the infrared transmitting tube of this transmitter module and receiver module, infrared receiving tube is connected with microprocessor, the column array scanning of infrared transmitting tube links to each other with the modulation signal of high-frequency modulator output, the column array scanning of infrared receiving tube links to each other with the output modulation signal of high-frequency modulator, this high-frequency modulator and power valve column array scanning same frequency.The synchronizing signal that transmitter module and receiver module respond described master microprocessor to be provided scans the 1st to N power valve and receiving tube one by one, every pair of emission, the infrared tube synchronous working of the same numbering on the receiving circuit module, and in every pair of emission of synchronization, receiver module has only a pair of infrared tube in work, the light intensity induced signal of the infrared transmitting tube emission that infrared receiving tube receives is through the sweep circuit of microprocessor control, the detecting circuit detection, it with the amplifier tube core, vacuum generator, resistance, electric capacity, cooperate the signal that infrared tube is received to amplify etc. discrete element, through ADC (Analog-to-Digital Converter, analog to digital converter), the light intensity signal of infrared tube is become digital signal; Master microprocessor carries out computing formation coordinate information to detected block information and sends to computer by USB interface or RS-232 serial line interface.One or more emissions or receiver module are controlled from microprocessor by one, what all controls transmitted and received works under the coordination of a master microprocessor from microprocessor, linking to each other with master microprocessor by I2C interface or SPI interface of each receiver module from microprocessor, the port that has an interrupt function from certain of microprocessor of each receiver module and transmitter module links to each other with the port that possesses the PWM output function of master microprocessor, realizes the synchronous working of whole infrared ray positioning touch device.
Infrared touching device of the present invention can also adopt modular production technology, and it is that each module can be by independent microprocessor control that each transmitter module or receiver module adopt modular design.Can develop the infrared ray positioning touch device that different size requires flexibly by the quantity that changes infrared tube on right quantity of transmitter module, receiver module or transmitter module, the receiver module.
Compared with prior art, the present invention has following beneficial effect:
The a plurality of modules of the present invention can a shared microprocessor, has reduced cost, has improved the cost performance of this infrared positioning touch device.The present invention adopts the light transmission piece that prevents that dust and anti-ambient light from disturbing, not only improved the anti-interference of infrared touching device, also simplified production technology, be all to have than obvious effects on the technology or on the cost, can also adopt the infrared emission of two or more different frequency, the anti-interference that receiving tube improves infrared positioning touch device in the same system.The present invention has taked special infrared tube arrangement mode, and is staggered with the infrared module of varied-frequency infrared tube, effectively avoided the interference that caused because of the infrared transmitting tube emission angle, and the effect of finishing track capturing on the large scale touch-screen is remarkable.
[description of drawings]
Fig. 1 is the existing light-conductive hole structural representation that the infrared positioning touch device of light-conductive hole is housed;
Fig. 2 is the structure and the light path synoptic diagram of existing infrared positioning touch device;
Fig. 3 is the scanning work sequential chart of transmitter module and the infrared pipe of receiver module on the directions X of new infrared touching device of the present invention;
Fig. 4 is the power valve of new infrared touching device different frequency of the present invention and the arrangement mode synoptic diagram of receiving tube;
Fig. 5 is principal and subordinate's microprocessor distribution schematic diagram of new infrared touching device of the present invention;
Fig. 6 is the working timing figure that the I2C bus timesharing of new infrared touching device of the present invention sends detected block information;
Fig. 7 is the primary module of new infrared touching device of the present invention and emission, receiver module interface synoptic diagram;
Fig. 8 is the transmitter module principle schematic of new infrared touching device of the present invention;
Fig. 9 is the receiver module principle schematic of new infrared touching device of the present invention;
Figure 10 is the primary module principle schematic of new infrared touching device of the present invention;
Figure 11 is principal and subordinate's microprocessor distribution schematic diagram of the shared MCU of a plurality of modules of the present invention.
[embodiment]
Please refer to Fig. 4, new infrared touching device provided by the present invention is the infrared touching device that adjacent infrared module adopts the infrared tube of different frequency, it is arranging the infrared transmission module and the receiver module of many group splicings, the corresponding transmitter module of X-direction and Y direction, the strict alignment of receiver module on X, Y coordinate direction.Wherein corresponding a pair of transmitter module, receiver module adopt infrared emission, the receiving tube of same frequency, and adjacent transmitter module, receiver module are illustrated in figure 4 as the power valve of infrared touching device different frequency of the present invention and the arrangement mode synoptic diagram of receiving tube to adopting infrared emission, the receiving tube of different frequency.Three pairs of emissions are installed on the X-direction, receiver module is right: X_SND1, X_RCV1 adopt frequency 1 (850nm); X_SND2, X_RCV2 adopt frequency 2 (940nm); X_SND3, X_RCV3 adopt frequency 1 (850nm).Three pairs of emissions are installed on the Y direction, receiver module is right: Y_SND1, Y_RCV1 adopt frequency 2 (940nm); Y_SND2, Y_RCV2 adopt frequency 1 (850nm); Y_SND3, Y_RCV3 adopt frequency 2 (940nm).Adjacent infrared module is corresponding to the pipe emission like this, the Frequency Design that receives becomes inconsistent, with the m pipe is example, be that the m plumber of X_SND2 and X_RCV2 is when doing, X_SND1, X_SND3 and X_RCV1, the m pipe of X_RCV3 is operated in the different frequency state, even the m power valve of X_SND2 can shine the corresponding infrared receiving tube of adjacent block, because with constantly, it is very weak that the m pipe of adjacent block receives the infrared light of m different frequency infrared transmitting tube emission of X_SND2, when shelter during in shelter 2 positions as shown in Figure 2, have only the infrared light of infrared transmitting tube emission of the corresponding transmitter module same frequency that the m pipe of X_RCV2 receives very strong, so on directions X, only detect a block information, in like manner the Y direction also only detects a block information at synchronization, and infrared touching device just can accurately detect the more specific location information of shelter.
In the present embodiment for avoiding infrared light reflection to disturb, 3-5 infrared tube on four angles in the infrared touching device done bias treatment to screen center, each transmitter module and receiver module are by controlling from microprocessor in this infrared touching device, this infrared touching device also includes a master microprocessor, in the present embodiment, master microprocessor and one of them are from the shared microprocessor of microprocessor and be integrated on the primary module, be the master microprocessor+X_RCV1 among Fig. 4, master microprocessor and distribute as shown in Figure 5 from microprocessor.
The principle of work of this transmitter module, receiver module and primary module shown in Fig. 8,9,10, the capable array scanning of the infrared transmitting tube of this transmitter module and receiver module, infrared receiving tube is connected with microprocessor, the column array scanning of infrared transmitting tube links to each other with the modulation signal of high-frequency modulator output, the column array scanning of infrared receiving tube links to each other with the output modulation signal of high-frequency modulator, this high-frequency modulator and power valve column array scanning same frequency.The port that has an interrupt function from microprocessor on the port that this master microprocessor has a PWM output function and infrared transmission module, the receiver module link to each other realize whole noctovisor scan positioning touch device synchronously.In descending synchronously of synchronizing signal, transmitter module, receiver module scan the 1st to N emission, receiving tube one by one by sequential shown in Figure 3 on the directions X, realize every group of transmitter module and receiver module infrared emission receive the pipe synchronous working, in like manner adopt identical scanning sequence and working method on the Y direction.Except synchronizing signal, receiver module also need the I2C interface from microprocessor and master microprocessor.By the I2C communication interface, each receiver module passes to master microprocessor to detected touch information timesharing, has improved the different size particularly sweep velocity and the reliability of large scale infrared touch panel.
The present invention designs a special infrared tube arrangement mode, can effectively avoid because the interference that the infrared transmitting tube emission angle causes.Sequential as shown in Figure 3 begins to scan one by one corresponding emission on the directions X simultaneously, each infrared tube of receiver module, synchronization is at a pair of transmitter module, only there is a pair of infrared tube in running order on the receiver module, but different emissions, receiver module becomes inconsistent to last corresponding Frequency Design to pipe, with m pipe among Fig. 4 is example, be that the m infrared tube of transmitter module X_SND2 and receiver module X_RCV2 is during with frequency 2 work, transmitter module X_SND1, X_SND3 and receiver module X_RCV1, the m infrared tube of X_RCV3 is in the duty of frequency 1, like this, even the m power valve of X_SND2 can shine the corresponding m infrared receiving tube of other adjacent receiver modules, but because with constantly, the m pipe of adjacent reception module is in the duty of different frequency, when shelter during in shelter 2 positions, have only X_RCV2 to detect block information, so on directions X, only detect a block information, in like manner adopt identical scanning sequence and working method also only to detect a block information at synchronization on the Y direction, infrared touching device just can accurately detect the more specific location information of shelter.
Each intermodule annexation of this infrared positioning apparatus is as follows as shown in Figure 7:
1, links to each other by power lead, ground wire, emission infrared tube power lead, synchronous signal line between each transmitter module.
2, link to each other by power lead, ground wire, synchronous signal line, I2C bus clock line, I2C bus data line between each receiver module.
3, the interface between primary module and transmitter module:
Employing+5V, GND provide power supply for MCU, the logic IC etc. of transmitter module;
Adopt LED_VCC power supply to be provided for the anode of power valve, the independent current source power supply, avoid and+interference between the 5V power supply;
Primary module offers transmitter module synchronous clock SYNC, and each receives, transmitter module cooperates the location work of finishing.
4, the interface between primary module and receiver module:
Employing+5V, GND give whole receiver module power supply;
Primary module offers receiver module synchronous clock SYNC, and each receives, transmitter module cooperates the location work of finishing;
Primary module is communicated by letter with receiver module, and (order of primary module is handed down to receiver module by the I2C bus for SDA, SCL) interconnection, and receiver module is uploaded touch coordinate information or other Debugging message by the I2C bus with the data line of I2C bus, clock line.
I2C bus of the present invention is finished communicating by letter between primary module and each receiver module, and the order of primary module is handed down to each receiver module by the I2C bus, and receiver module is uploaded touch information or other Debugging message by the I2C bus.
The present invention is for improving the refresh rate of large scale infrared ray positioning touch screen, I2C communication has adopted special work schedule mode to avoid bus collision, improved the speed of infrared ray positioning touch device processing block information data greatly, the effect of finishing track capturing on the large scale touch-screen is remarkable.As shown in Figure 6, under operate as normal, each receiver module is counted synchronizing pulse, when the umber of pulse of counting during for 16 times of this receiver module numbering, if detect block information, begin to start the detected block information of transmission constantly to master microprocessor at this; So just avoided sending the bus collision that block information causes simultaneously behind all infrared tube ends of scan in the conventional method, improved refresh rate.
For described sending module and receiver module by from microprocessor control, for the present invention that reduces cost can realize two or more at least transmitter modules shared one from microprocessor, two or more at least receiver module shared one from microprocessor.Adopt in the present embodiment X_SEND1 and two transmitter modules of X_SEND2 shared one from microprocessor, three transmitter modules of Y_SND1, Y_SEND2 and Y_SEND3 shared one from microprocessor, the shared microprocessor of two receiver modules of Y_RCV2, Y_RCV3, master microprocessor and one of them are from the shared microprocessor of microprocessor and be integrated on the primary module, being master microprocessor+X_RCV1, is master microprocessor and from the microprocessor distribution schematic diagram as shown in figure 11.On X, Y coordinate direction, arranging the infrared transmission module and the receiver module of splicing, the corresponding transmitter module of X-direction and Y direction, the strict alignment of receiver module.Infrared tube arrangement architecture, each module principle figure are identical with embodiment 1 with each intermodule annexation, wherein corresponding transmitter module X_SEND1, receiver module X_RCV1 adopt infrared emission, the receiving tube of frequency 1 (850nm) on the X-direction, corresponding transmitter module X_SEND2, receiver module X_RCV2 adopt infrared emission, the receiving tube of frequency 2 (940nm), and X_SND3, X_RCV3 adopt frequency 1 (850nm); And corresponding transmitter module Y_SEND1, receiver module Y_RCV1 adopt infrared emission, the receiving tube of frequency 2 (940nm) on the Y direction, corresponding infrared emission, the receiving tube that gets transmitter module Y_SEND2, receiver module Y_RCV2 employing frequency 1 (850nm), Y_SND3, Y_RCV3 adopt frequency 2 (940nm).With the emission on the directions X, receiver module is to being example, when the m of X_SND2 power valve is operated in emission state, it is very strong to have only the m pipe of corresponding receiver module X_RCV2 to receive the infrared light of infrared transmitting tube emission of same frequency, though the m of X_SND2 number tube-launched infrared light can shine adjacent block X_RCV1, the corresponding m infrared receiving tube of X_RCV3, but because with constantly, adjacent block X_RCV1, it is very weak that the m pipe of X_RCV3 receives the infrared light of m different frequency infrared transmitting tube emission of X_SND2, so reduced because the phase mutual interference between the infrared tube that the infrared tube emission angle causes.For avoiding infrared light reflection to disturb, 3-5 infrared tube on four angles in the infrared touching device done bias treatment to screen center in the present embodiment.In descending synchronously of synchronizing signal, transmitter module, receiver module are by shown in Figure 3, scan each module the 1st on the directions X one by one to N emission, receiving tube, realize every group of transmitter module and receiver module infrared emission receive the pipe synchronous working, in like manner also adopt identical scanning sequence and working method on the Y direction.The I2C bus is finished communicating by letter between primary module and each receiver module, and the order of primary module is handed down to each receiver module by the I2C bus, and receiver module is uploaded touch information or other Debugging message by the I2C bus.
Embodiment for other can change the transmitter module on X and the Y direction, the structure and the arrangement mode of receiver module.Can adopt the infrared emission of two or more different frequency, the anti-interference that receiving tube improves infrared positioning touch device in the same system.For example can adopt emission, the receiving tube of two kinds of different frequencies on same emission, receiver module, the pipe that has so not only improved the anti-interference of device and scanned two different frequencies on the module simultaneously makes the refresh rate of device double.The number of infrared tube on increase or minimizing transmitter module, the receiver module be can also require according to the size dimension of infrared touch panel or the transmitter module on X and the Y direction, the number of receiver module changed.
The above is preferred embodiment of the present invention only, and protection scope of the present invention is not limited thereto, and those of skill in the art are any to be included within protection domain of the present invention based on non-material change on the technical solution of the present invention.
Claims (9)
1, a kind of new infrared touching device, it is included in vertical, one or more groups transmitter module and the receiver module arranged on the transverse direction, it is characterized in that, link to each other by synchronous signal line between each transmitter module, link to each other with bus by synchronous signal line between each receiver module, described each receiver module and transmitter module are by controlling from microprocessor, linking to each other with master microprocessor by synchronous signal line of this transmitter module from microprocessor, linking to each other with master microprocessor with synchronous signal line of this receiver module from microprocessor through bus, benchmark synchronizing signal of this master microprocessor output give all transmitter modules from microprocessor and all receiver modules from microprocessor, and obtain the detected block information of each receiver module from bus, carry out touch location calculation, and result of calculation sent to computing machine, wherein corresponding a pair of emission, receiver module is to adopting the identical infrared emission of frequency, receiving tube, adjacent transmitter module, receiver module is to adopting the different infrared emission of frequency, receiving tube.
2, new infrared touching device as claimed in claim 1, it is characterized in that, at least one end of at least one transmitting side of this infrared touching device and/or at least one receives the infrared tube biasing certain angle of at least one end on limit, forms reflection to prevent infrared light at the edge of infrared frame.
3, new infrared touching device as claimed in claim 2, it is characterized in that, the capable array scanning of the infrared transmitting tube of this transmitter module and receiver module, infrared receiving tube is connected with microprocessor, the column array scanning of infrared transmitting tube links to each other with the modulation signal of high-frequency modulator output, the column array scanning of infrared receiving tube links to each other with the output modulation signal of high-frequency modulator, this high-frequency modulator and power valve column array scanning same frequency.
4, new infrared touching device as claimed in claim 1 is characterized in that, on the frame at four edges, seizure plane of infrared touching device light transmission piece is installed.
5, new infrared touching device as claimed in claim 1 is characterized in that, this master microprocessor and one of them are from the shared microprocessor of microprocessor.
6, new infrared touching device as claimed in claim 1, it is characterized in that, transmitter module and receiver module respond described benchmark synchronizing signal and scan the 1st to N power valve and receiving tube one by one, each receiver module adopt detected touch information or other Debugging message the work schedule mode of timesharing to pass to master microprocessor from the microprocessor through bus interface.
7, new infrared touching device as claimed in claim 1 is characterized in that, two or more transmitter modules shared one from microprocessor.
8, new infrared touching device as claimed in claim 1 is characterized in that, two or more receiver modules shared one from microprocessor.
9, new infrared touching device as claimed in claim 1, it is characterized in that, same group of emission, receiver module centering are adopted infrared emission, the receiving tube of two or more different frequency, wherein corresponding a pair of infrared emission, reception are adopted identical frequency to pipe, and adjacent infrared emission, reception are to the different frequency of pipe employing.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200610037391XA CN100552607C (en) | 2006-08-31 | 2006-08-31 | A kind of new infrared touching device |
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| CNB200610037391XA CN100552607C (en) | 2006-08-31 | 2006-08-31 | A kind of new infrared touching device |
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| CN100552607C true CN100552607C (en) | 2009-10-21 |
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| CNB200610037391XA Expired - Fee Related CN100552607C (en) | 2006-08-31 | 2006-08-31 | A kind of new infrared touching device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI578210B (en) * | 2013-04-12 | 2017-04-11 | 鴻海精密工業股份有限公司 | Electronic whiteboard |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226446B (en) * | 2008-01-09 | 2010-10-27 | 广东威创视讯科技股份有限公司 | Infrared touch panel and multi-point touch locating method |
| CN101819488A (en) * | 2009-02-27 | 2010-09-01 | 北京汇冠新技术股份有限公司 | Circuit board for infrared touch screen and infrared touch screen |
| CN101907948A (en) * | 2009-06-05 | 2010-12-08 | 北京汇冠新技术股份有限公司 | Infrared touch screen and detection method thereof |
| CN101788870B (en) * | 2009-11-04 | 2013-04-24 | 深圳新山鹰互动技术有限公司 | Multi-frequency scanning infrared touch device |
| CN102122218A (en) * | 2010-01-11 | 2011-07-13 | 深圳市山鹰科技有限公司 | Optical path system for multi-touch point identification of infrared touch device |
| CN102455830B (en) * | 2011-11-30 | 2014-07-23 | 广东威创视讯科技股份有限公司 | Infrared touch device and method |
| CN103699276B (en) * | 2013-12-31 | 2016-08-24 | 广州视睿电子科技有限公司 | Infrared geminate transistor touch screen scanning method and system |
| CN104598082B (en) * | 2015-01-23 | 2017-09-22 | 青岛海信电器股份有限公司 | A kind of method and device for determining candidate touch point |
| CN105094464A (en) * | 2015-08-05 | 2015-11-25 | 深圳市华星光电技术有限公司 | Infrared touch control device |
| CN108172146B (en) * | 2017-12-26 | 2020-07-10 | 深圳橙立科技有限公司 | Interactive display board and method thereof |
| CN116483224A (en) * | 2022-01-14 | 2023-07-25 | 广州众远智慧科技有限公司 | Control method of infrared touch device and infrared touch system |
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2006
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI578210B (en) * | 2013-04-12 | 2017-04-11 | 鴻海精密工業股份有限公司 | Electronic whiteboard |
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| CN1952865A (en) | 2007-04-25 |
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