CN101833399B - Large-size matrix-scanning-type infrared touch input device - Google Patents
Large-size matrix-scanning-type infrared touch input device Download PDFInfo
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Abstract
The invention relates to a large-size matrix-scanning-type infrared touch input device which comprises a main control module, a group of transmitting modules and a group of receiving modules. The transmitting modules are connected with the main control module and contain a plurality of infrared transmitting tubes, the receiving modules are connected with the main control module and contain a plurality of infrared receiving tubes, and the transmitting modules and the receiving modules are sequentially arranged along the periphery of a white board so that a transmitting module corresponds to a receiving module along the transversal direction or the longitudinal direction. The main control module comprises a dynamic addressing circuit connected with the transmitting modules and the receiving modules. When the infrared touch device is in work, each module does not need a jumper or circuit distinguishing, addresses are dynamically distributed; in addition, the real size of the white board is not restricted and the numbers of the transmitting modules and the receiving modules can be randomly expanded as required.
Description
Technical field
The present invention relates to touch input device, more particularly, relate to a kind of large-size matrix-scanning-type infrared touch input device.
Background technology
Because infrared touch input device when matrix-scanning is worked, must guarantee to have only 1 infrared transmitting tube and 1 infrared receiving tube in running order, therefore, must carry out addressing.The circuit arrangement of traditional infrared touch input device is to adopt static addressing mode, promptly receives the unique fixed address of unit (it comprises transmitter module and receiver module) use for each infrared, and they can not overlappingly can not exchange each other.Simultaneously, the emissive power decentralised control, the emissive power of every transmitter module is confirmed by the resistance value of adjustable resistance, if need the change emissive power, the resistance of then necessary all transmitter modules of adjustment.Like this, in batch process, must pass through following flow process to infrared test and being provided with of address of receiving the unit:
1, because infrared is received the unit and must addressing could work; Must wire jumper before infrared received the unit and test; Receive the unit with all infrared and be addressed to initial address (for example 0; As long as system sends a test instruction and just can know which cell failure like this), infrared two kinds of module receiving the unit all must the wire jumper addressing, so the workload multiplication.
2, after test is accomplished again with all infrared receive the unit as required wire jumper to separately address.
3, wire jumper also will be write down the address on every block of plate after accomplishing.
4, be the emissive power of adjusting horizontal and vertical transmitter module according to specific product model, size at last, promptly adjust the adjustable electric resistance of every transmitter module.
So not only time-consuming, and easy error, also can cause the waste of element, because secondary processing is arranged, artificial carelessness possibility rosin joint, dry joint brings hidden danger to product quality.
Because these defectives are also keeped in repair particularly on-site maintenance to product and are brought a lot of inconvenience
1, finds infrared of fault accurately and receive the unit, write down the address.
2, will test infrared good receipts unit and carry out the wire jumper addressing according to the address of writing down.
3, wire jumper is write down the address on this piece plate after accomplishing.
4 if transmitter module also will be according to concrete needs adjustment adjustable electric resistance.
This shows that this maintenance of products also is cumbersome.
Summary of the invention
The technical matters that the present invention will solve is; Need the defective of wire jumper addressing when receiving cell operation and test, a kind of large-size matrix-scanning-type infrared touch input device that adopts dynamic addressing is provided to infrared in the infrared touch input device of prior art.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of large-size matrix-scanning-type infrared touch input device; Comprise main control module, be connected the one group of transmitter module that contains a plurality of infrared transmitting tubes on the main control module and be connected the group of received module that contains a plurality of infrared receiving tubes on the main control module; Said transmitter module is arranged in order all around along blank with said receiver module and makes a transmitter module along a horizontal or vertical corresponding receiver module; Said infrared touch input device also comprises the Dynamic Location circuit, and said Dynamic Location circuit comprises: be located in the main control module and produce circuit with the address signal that produces serial addressing signal and synchronizing signal; With produce a plurality of serial shift registers that circuit is connected with said address signal, said a plurality of serial shift registers with each transmitter module and each receiver module respectively cascade under said synchronizing signal effect, said serial addressing signal passed to successively each of said transmitter module and said receiver module.
Because the present invention adopts the Dynamic Location mode, to have avoided the trouble that wire jumper carries out addressing is set on each module, the position of each module can exchange arbitrarily, and need not carry out any change to its hardware, therefore, safeguards and uses convenient.
According to one embodiment of present invention; Said Dynamic Location circuit comprises that also the address signal that produces parallel addressing signal produces circuit; When said serial addressing signal and synchronizing signal cooperating were chosen a transmitter module and a receiver module, said parallel addressing signal chose an infrared transmitting tube and the infrared receiving tube on said transmitter module and the said receiver module in running order.
Carry out addressing owing to adopt the employing of Dynamic Location circuit to send serial addressing signal, therefore wiring is simpler, thereby has practiced thrift cost.The address of transmitter module and receiver module only confirmed in the position of every group of cascade by it, so any two transmitter modules and receiver module exchange back hardware and need not do any change.
According to one embodiment of present invention, said serial shift register is a trigger of being arranged to the edge trigger mode, and it is transferred to output terminal with the serial addressing signal on the input end when detecting said synchronizing signal low level is arranged to high level.
According to one embodiment of present invention, said serial addressing signal is a series of single pulse signal.
According to one embodiment of present invention, said infrared touch input device also comprises being connected to be used on the said transmitter module concentrating according to the distance of said transmitter module and said receiver module and regulates the wherein interconnecting module of the power of all power valves.
According to the present invention, said interconnecting module is made up of adjustable resistance.
Through power concentration control, do not need separately the emissive power of each transmitter module to be adjusted, use more simple and convenient.
According to one embodiment of present invention; Said interconnecting module also be used to transfer said serial addressing signal and said parallel addressing signal, make along around said one group of transmitter module of arranging can communicate by letter according to said addressing signal is corresponding one by one with a group of received module.
The present invention also provides a kind of large scale the infrared electronic whiteboard of writing; It comprises main control module, is connected the one group of transmitter module that contains a plurality of infrared transmitting tubes on the main control module and is connected the group of received module that contains a plurality of infrared receiving tubes on the main control module; Said transmitter module is arranged in order all around along blank with said receiver module and makes a transmitter module along a horizontal or vertical corresponding receiver module; Said infrared touch input device also comprises the Dynamic Location circuit, and said Dynamic Location circuit comprises: be located in the main control module and produce circuit with the address signal that produces serial addressing signal and synchronizing signal; With produce a plurality of serial shift registers that circuit is connected with said address signal, said a plurality of serial shift registers with each transmitter module and each receiver module respectively cascade under said synchronizing signal effect, said serial addressing signal passed to successively each of said transmitter module and said receiver module.
Therefore, the infrared touch input device of embodiment of the present invention has following beneficial effect: can expand the quantity of receiver module and transmitter module arbitrarily, and not receive the restriction of hardware; Each module need not to distinguish on wire jumper or the circuit during touch apparatus work, and the address of receiver module and transmitter module is only by its actual residing determining positions; Owing to adopt the serial addressing, therefore wiring is simpler, thereby has practiced thrift cost.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 has schematically shown the topology layout figure according to infrared touch input device of the present invention;
Fig. 2 has schematically shown the logic diagram according to infrared touch input device of the present invention.
Embodiment
Like Fig. 1, shown in Figure 2, wherein shown the topology layout figure and the logic diagram of infrared touch input device of the present invention.According to one embodiment of present invention, infrared touch input device comprises that mainly main control module, infrared receive unit and interconnecting module.Wherein the infrared receiving/transmission unit is made up of with a receiver module (receiving 6 like the receipts 0-among Fig. 1) a corresponding transmitter module of position (0-that sends out as among Fig. 1 sends out 6), like the transmitter module among Fig. 1 (sending out 0) and receiver module (receipts 0) just constitute an infrared receiving/transmission unit.Contain a plurality of infrared transmitting tubes and a plurality of infrared receiving tube in transmitter module and the receiver module respectively.Transmitter module is arranged in order all around along blank with receiver module and makes a transmitter module along a horizontal or vertical corresponding receiver module.
As shown in Figure 2, main control module also comprises the Dynamic Location circuit that is connected on transmitter module and the receiver module.According to one embodiment of present invention; The Dynamic Location circuit is used to produce serial addressing signal, synchronizing signal and parallel addressing signal, and serial addressing signal, synchronizing signal and parallel addressing signal cooperating are with in running order at an only selected infrared transmitting tube of a moment and an infrared receiving tube.
In one embodiment of the invention, transmitter module and said receiver module also comprise the serial shift register that is used to receive serial addressing signal and synchronizing signal respectively, through serial shift register each transmitter module and each receiver module are distinguished cascade.Because the employing of Dynamic Location circuit is sent serial addressing signal and carried out addressing, therefore wiring is simpler, thereby has practiced thrift cost.The address of transmitter module and receiver module only confirmed in the position of every group of cascade by it, so any two transmitter modules and receiver module exchange back hardware and need not do any change.
According to one embodiment of present invention, serial shift register is a trigger of being arranged to the edge trigger mode, and it is transferred to output terminal with the serial addressing signal on the input end when detecting said synchronizing signal low level is arranged to high level.In an embodiment of the present invention, serial addressing signal is a series of single pulse signal.
As shown in Figure 1, receive to have 6 infrared that in unit and each unit infrared touch input device of 16 power valves and 16 receiving tubes to be arranged respectively be that example is described the present invention in detail.The flow direction that dynamic address signal in the dotted line indication dynamic address circuit comes out from main control module is also indicated infrared the distribution trend of receiving the unit.Main control module is the address signal source, and last piece transmitter module or receiver module are the address signal places.Receive cell distribution on this signal line from the signal source to the signal sink for all infrared.The Dynamic Location signal that comes out from main control module is divided into two-way: the one tunnel gets into transmitter module, and one the tunnel gets into receiver module.Transmitter module distributes in order, and in order to keep transmitter module and receiver module synchronous, receiver module does not distribute in order.
Therefore, interconnecting module 1-3 is set for use in signal converting.Visible by Fig. 1,88 ends of the 77 terminations receipts 0 of receipts 6 form intersection on interconnecting module 1, to guarantee the correspondence of transmitter module and receiver module physical location logical relation.
Interconnecting module 2 except that playing the effect of addressing signal converting, also can carry out the power concentration regulating and controlling between emitted transverse plate and vertical expelling plate.Visible by Fig. 1, at interconnecting module 2 places, send out 77 ends of 3 77 ends order sending and receiving 4,88 ends of sending out 3 88 ends order sending and receiving 4 are so that the addressing signal of switching transmitter module and receiver module, and do not intersect above that.
Interconnecting module 3 plays the signal converting effect, sends out 6 88 ends by 88 terminations of the visible receipts 3 of Fig. 1, is transferred to vertical receiver module (receiving 4-receipts 6) to the addressing signal of horizontal receiver module (receive 0-and receive 3) through transmitter module, to guarantee the correspondence of its physical location logical relation.
The address signal that main control module comes out can not directly get into vertical first receiver module (receiving 4); But walk around vertical receiver module (receive 4-and receive 6); First receiver module of card extender 1 place cross-entry (receiving 0); Address signal gets into transmitter modules at horizontal last piece receiver module (receiving 3) through interconnecting module 3, and address signal is walked around all transmitter modules and arrived main control module at last, and the entering of process main control module is first receiver module (receiving 4) vertically.
In an embodiment according to the present invention, adopt 4 bit parallel data lines to manage a grade addressing, can select 16 receiving tubes or power valve.So only need six roots of sensation line just can specifically choose a receiving tube and a power valve, and need not to be concerned about the electronic whiteboard size.All transmitter modules and receiver module are all just the same, need not change and can arbitrarily exchange.Change to the position of receipts 2 such as receipts 4 and go just to have become receipts 4, that is to say that the address of each module is not fixed, the position on signal link is only depended in its address.This brings great convenience to maintenance, and such as receiving 5 faults that occur, it is just passable and need not do any change only need to change the duplicate receiver module of lastblock again.
With the transmitter module be below example explanation send out 2 with send out 4 and send out 2 after exchanging why and become 4, become 2 and send out 4.Introduce the principle that module is selected earlier; Main control module adopts pulse mode to select when scanning; Receive the unit for each infrared and be provided with shift register; Whenever receive shift pulse of main control module and be about to current infrared the state (low level or high level) of receiving the unit and be sent to infrared of next stage and receive the unit, and this infrared state of receiving the unit become the state of infrared receipts of upper level unit.Select for use low level as selected signal in the present embodiment; And high level is as non-selected signal, in scanning, whenever only allows one infrared and receives that the unit is in selected state (low level) and other all infrared receives unit and is in non-selected state (high level).In fact infrared all relay transmission of receiving plate in scanning process to low level signal.
This shows that initial low level selected signal results from the D place of main control module, divide two-way, the one tunnel gets into receiver module, and one the tunnel gets into transmitter module, can guarantee like this to transmit and receive synchronously.Scanning beginning main control module sends a shift pulse, and the low level selected signal appears at sends out 0, sends out 0 selected; The aft engine of having worked sends a shift pulse again, and the low level selected signal leaves to be sent out 0 and appear at and send out 1, sends out 1 selected; The aft engine of having worked sends a shift pulse again, and the low level selected signal leaves to be sent out 1 and appear at and send out 2, sends out 2 selected; It is thus clear that main frame is sent into 3 shift pulses and chosen 2, be decided to be 3-1=2 to the logical address of sending out 2 according to the umber of pulse of sending into.
Then main control module sends a shift pulse again; The low level selected signal leaves to be sent out 2 and appears at and send out 3, sends out 3 selectedly, and the aft engine of having worked sends a shift pulse again; The low level selected signal leaves to be sent out 3 and appears at and send out 4; Send out 4 selectedly, visible main control module is sent into 5 shift pulses and has been chosen 4, is decided to be 5-1=4 to the logical address of sending out 4 according to the umber of pulse of sending into.
If will send out 2 with send out 4 place-exchange be identical owing to send out 2 with sending out 4, main control module is sent into 3 shift pulses and can be chosen and send out 4, sending out 4 logical address is 3-1=2 just.Main control module is sent into 5 shift pulses and has been chosen 2, and sending out 2 logical address be 5-1=4 just, and visible change bit postpone is sent out 2 and become 4, and 4 have become 2.
In like manner receiver module also is the same.
In addition, the size of electronic whiteboard varies, so the emissive power of transmitter module just must be able to be regulated, regulating emissive power mainly is the resistance size of the power controlling resistance of adjustment transmitter module.And horizontal and vertical emissive power is different, and lateral separation is near.Emissive power can be a little bit smaller, and fore-and-aft distance is far away, and emissive power will be more greatly.In new departure, adopted the power concentration control mode; Lateral direction power adjustable resistance and vertical adjustable power resistance promptly in interconnecting module 2, have been arranged; The power valve drive end of all horizontal transmitter modules (send out 0-and send out 3) is pooled to the lateral direction power adjustable resistance of interconnecting module 2, and the power valve drive end of all transmitter modules (send out 4-and send out 6) is pooled to vertical adjustable power resistance of interconnecting module 2 longitudinally.Need to regulate the lateral direction power adjustable resistance that emitted transverse power only need be adjusted interconnecting module 2, regulate vertical emissive power and only need adjust vertical adjustable power resistance of interconnecting module 2 and not need all adjustment separately of each piece transmitter module.Said infrared touch input device also comprises being connected and is used on the said transmitter module concentrating the wherein interconnecting module of the power of all power valves of adjusting according to the distance of said transmitter module and said receiver module.
Large-size matrix-scanning-type infrared touch input device according to the present invention can be used in the touch-screen, also can be used for infrared writing in the electronic whiteboard.Embodiments of the invention only are used for illustration purpose, and unrestricted, are not deviating under the spirit and scope of the present invention situation, can revise arbitrarily and are out of shape it.Be appreciated that these distortion and revise and still fall within protection scope of the present invention.The present invention is only limited accompanying claims.
Claims (4)
1. large-size matrix-scanning-type infrared touch input device; Comprise main control module, be connected the one group of transmitter module that contains a plurality of infrared transmitting tubes on the main control module and be connected the group of received module that contains a plurality of infrared receiving tubes on the main control module; Said transmitter module is arranged in order all around along blank with said receiver module and makes a transmitter module along a horizontal or vertical corresponding receiver module
It is characterized in that, also comprise Dynamic Location circuit, interconnecting module, said Dynamic Location circuit comprises:
Be located in the main control module and produce circuit with the address signal that produces serial addressing signal and synchronizing signal; With produce a plurality of serial shift registers that circuit is connected with said address signal, said a plurality of serial shift registers with each transmitter module and each receiver module respectively cascade under said synchronizing signal effect, said serial addressing signal passed to successively each of said transmitter module receiver module; Produce circuit with being located in the main control module with the address signal that produces parallel addressing signal; When said serial addressing signal and synchronizing signal cooperating were chosen a transmitter module and a receiver module, said parallel addressing signal chose an infrared transmitting tube and the infrared receiving tube on said transmitter module and the said receiver module in running order;
Said interconnecting module is connected and is used on the said transmitter module concentrating the wherein power of all power valves of adjusting according to the distance of said transmitter module and said receiver module;
Said interconnecting module is made up of adjustable resistance;
Said interconnecting module also be used to transfer said serial addressing signal and said parallel addressing signal, make along around one group of transmitter module arranging can communicate by letter according to said addressing signal is corresponding one by one with a group of received module.
2. infrared touch input device according to claim 1; It is characterized in that; Said serial shift register is a trigger of being arranged to the edge trigger mode, and it is transferred to output terminal with the serial addressing signal on the input end when detecting said synchronizing signal low level is arranged to high level.
3. infrared touch input device according to claim 2 is characterized in that, said serial addressing signal is a series of single pulse signal.
4. the infrared electronic whiteboard of writing of large scale is characterized in that, comprises each described infrared touch input device like claim 1-3.
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| CN2009101059779A CN101833399B (en) | 2009-03-11 | 2009-03-11 | Large-size matrix-scanning-type infrared touch input device |
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| CN2009101059779A CN101833399B (en) | 2009-03-11 | 2009-03-11 | Large-size matrix-scanning-type infrared touch input device |
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| CN101833399A CN101833399A (en) | 2010-09-15 |
| CN101833399B true CN101833399B (en) | 2012-03-14 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102411457B (en) * | 2010-09-21 | 2013-11-06 | 北京鸿合盛视数字媒体技术有限公司 | Electronic whiteboard, display equipment, adaptive transmitted power regulation method and system for electronic whiteboard and display equipment |
| CN102298472B (en) * | 2011-08-17 | 2013-11-27 | 广州视睿电子科技有限公司 | Infrared geminate transistor touch screen system and communication method thereof |
| JP6668193B2 (en) * | 2016-07-29 | 2020-03-18 | 株式会社ジャパンディスプレイ | Sensor and display device |
| CN110879673A (en) * | 2019-12-06 | 2020-03-13 | 深圳市康冠商用科技有限公司 | Infrared touch screen cascade device |
| CN116719437A (en) * | 2022-08-05 | 2023-09-08 | 广州众远智慧科技有限公司 | Scanning control method, scanning control device and display device of infrared touch screen |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3764813A (en) * | 1972-04-12 | 1973-10-09 | Bell Telephone Labor Inc | Coordinate detection system |
| CN2495063Y (en) * | 2001-08-24 | 2002-06-12 | 北京汇冠科技有限公司 | Infrared element gate circuit for infrared touch screen |
-
2009
- 2009-03-11 CN CN2009101059779A patent/CN101833399B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3764813A (en) * | 1972-04-12 | 1973-10-09 | Bell Telephone Labor Inc | Coordinate detection system |
| CN2495063Y (en) * | 2001-08-24 | 2002-06-12 | 北京汇冠科技有限公司 | Infrared element gate circuit for infrared touch screen |
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