CN206331395U - A kind of infrared touch-control circuit - Google Patents
A kind of infrared touch-control circuit Download PDFInfo
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- CN206331395U CN206331395U CN201621323733.XU CN201621323733U CN206331395U CN 206331395 U CN206331395 U CN 206331395U CN 201621323733 U CN201621323733 U CN 201621323733U CN 206331395 U CN206331395 U CN 206331395U
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Abstract
The utility model discloses a kind of infrared touch-control circuit, including：Triode, gating unit and signal amplification unit；The infrared signal exported in infrared receiving tube, which is sent to after being amplified by triode in gating unit, carries out signal gating, and the signal exported from gating unit is amplified processing by signal amplification unit；The signal amplified by triode is by infrared receiving tube Input matrix into gating unit, and infrared receiving tube matrix arranges multichannel infrared receiving tube according to linescan method to form receiving matrix.The infrared touch-control circuit carries out the amplification of signal by triode, saves the amplifier chip on every piece of receiver board；Make all reception pipes that signal to be uniformly sent to gating unit by infrared receiving tube matrix to carry out signal gating, the gating device used needed for every 8 reception pipes can be saved.Infrared touch-control circuit described in the utility model can not only greatly save cost, and can improve the stability and efficiency of signal transacting based on the optimization to circuit.
Description
Technical field
The utility model is related to infrared touch screen technical field, particularly relates to a kind of infrared touch-control circuit.
Background technology
The infrared touch technology of main flow is all the infrared tube technology that uses in the market, that is, infrared transmitting tube and red
Outer reception pipe is all to be arranged in order in sequence.If it is intended to relatively stable touch-control scanning result is obtained, just must be to transmitting
Pipe or the signal of reception pipe are amplified processing, however, being considered based on cost factor, the power of transmitting tube is generally all to use
Fixed power, therefore the signal transacting of receiving terminal just turns into the emphasis of signal transacting in infrared touch-control field.At present, based on connecing
The signal transacting of closed tube has more ripe infrared touch-control circuit structure.For example：Current infrared touch-control circuit is most
All it is to use multiple circuit board for receiving, and every piece of circuit board for receiving 64 reception pipes of correspondence carry out the processing of signal.
But, the signal amplifying part point of existing infrared touch-control circuit is all after infrared receiving tube receives small-signal
The enhanced processing of signal is directly carried out using operational amplifier, so results in and an amplifier core has been required on every piece of receiver board
Piece, i.e. operational amplifier, not only increase cost, and make signal transacting increasingly complex, stability reduction.
Utility model content
In view of this, the purpose of this utility model is to propose a kind of infrared touch-control circuit, can be to infrared touch-control circuit
Optimize and simplify, improve the stability and efficiency of signal transacting, greatly save cost.
A kind of infrared touch-control circuit provided based on above-mentioned purpose the utility model, including：Triode, gating unit and letter
Number amplifying unit；The infrared signal exported in single infrared receiving tube is sent in gating unit after by triode amplifying
Row signal gating, the signal exported from the gating unit is amplified processing by signal amplification unit；Wherein, by three
The signal of pole pipe amplification is by infrared receiving tube Input matrix into gating unit, and the infrared receiving tube matrix is infrared by multichannel
Reception pipe arranges to form receiving matrix according to linescan method.
Optionally, the gating unit includes gating module, the first reseting module, the second reseting module and base modules；
The signal amplification unit includes the first amplification module, the second amplification module, the 3rd amplification module and gain module；
The input of the gating module is connected with the signal amplified by triode, the output end of gating module and first
The normal phase input end connection of amplification module；The input of first reseting module and the input of gating module are connected, and first resets
The output end of module is connected with the inverting input of the first amplification module；The output end of the base modules and the first amplification module
Inverting input connection；The output end of first amplification module is connected with the normal phase input end of the second amplification module, and second
The reverse inter-input-ing ending grounding of amplification module, the output end of the second reseting module is connected with the normal phase input end of the second amplification module；
The Enable Pin of first reseting module is connected with the Enable Pin of the second reseting module；The output end of second amplification module and the 3rd
The normal phase input end connection of amplification module, the output end of gain module is connected with the inverting input of the 3rd amplification module, signal
Exported from the output end of the 3rd amplification module.
Optionally, the gating module includes analog switch；First reseting module includes two parallel arrangement of moulds
Intend switch；Second reseting module includes module switch；First amplification module, the second amplification module, the 3rd amplification mould
Block and base modules include amplifying device；The gain module includes analog switch；
Amplify by triode and gating is connected to by capacitances in series by the signal of infrared receiving tube Output matrix respectively
The input of module, and often pass through a resistance eutral grounding between road signal and electric capacity；The output end of gating module passes through resistance
Ground connection；The output end of the gating module is connected to the normal phase input end of the first amplification module by resistance；
Two analog switches in first reseting module select different inputs to be consecutively connected to gating module
Input, remaining input terminal is used as Enable Pin；The output end of first reseting module is connected to the first amplification module by resistance
Inverting input；
The normal phase input end of base modules is connected to power supply and ground connection, the inverting input of base modules by resistance respectively
Connected by the output end of resistance and base modules, the output end of base modules is connected with the output end of the first reseting module；
Inverting input in first amplification module passes through the resistance that is arranged in parallel and capacitance connection to the first amplification module
In output end, the normal phase input end that the output end in the first amplification module passes through capacitance connection to the second amplification module；
The inverting input of second amplification module is by a resistance eutral grounding, while being amplified by another resistance and second
The output end connection of module；The output end of second amplification module is connected to the normal phase input end of the 3rd amplification module by resistance；
The inverting input of 3rd amplification module is connected by resistance with the output end of the 3rd amplification module, the 3rd amplification mould
The output end of block is exported by a resistance of connecting, and output end passes through resistance eutral grounding；
The input of gain module respectively passes through resistance eutral grounding.
From the above it can be seen that the infrared touch-control circuit that the utility model is provided passes through in each infrared receiving tube
Output end connects the amplification that a triode carries out signal, enabling the amplifier chip saved on every piece of receiver board；By adopting
The gating unit for alloing all reception pipes to send signal in mainboard with infrared receiving tube matrix carries out the choosing of signal
It is logical, so, every 8 reception pipes in original technology can be saved and be required to the gating device used, while by causing multichannel mould
The efficiency of signal transacting can be improved by intending signal parallel transmission.Therefore, infrared touch-control circuit described in the utility model can not only
Cost is enough greatlyd save, and the stability and efficiency of signal transacting can be improved based on the optimization to circuit.
Brief description of the drawings
The principle schematic of the one embodiment for the infrared touch-control circuit that Fig. 1 provides for the utility model；
The part-structure schematic diagram of the one embodiment for the infrared touch-control circuit that Fig. 2 provides for the utility model.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to the drawings, the utility model is further described.
It should be noted that all statements for using " first " and " second " are for area in the utility model embodiment
Be divided to the entity of two same names non-equal or the parameter of non-equal, it is seen that " first " " second " only for statement convenience,
The restriction to the utility model embodiment is should not be construed as, subsequent embodiment no longer illustrates one by one to this.
It is directed to current infrared touch-control circuit and there is complex structure, the problem of cost is higher, the utility model passes through reduction
The quantity of amplifier chip and analog switch, has greatly saved the cost of manufacture of circuit.
Shown in reference picture 1, the principle schematic of one embodiment of the infrared touch-control circuit provided for the utility model.Institute
Stating infrared touch-control circuit includes：Triode, gating unit and signal amplification unit；Wherein, the output of each infrared receiving tube is equal
A triode is connected, the infrared receiving tube then set by ranks sends signal to gating unit, gating unit and letter
Number amplifying unit, which is connected, make it that the signal of gating is amplified processing.So so that the infrared letter exported in single infrared receiving tube
It is sent to after number being amplified by triode in gating unit and carries out signal gating, the signal warp exported from the gating unit
Cross signal amplification unit and be amplified processing；Wherein, the signal amplified by triode is arrived by infrared receiving tube Input matrix
In gating unit, the infrared receiving tube matrix arranges multichannel infrared receiving tube to form receiving matrix according to linescan method,
And the infrared receiving tube matrix is common reception pipe arrangement matrix.Certainly, infrared touch-control circuit described in the utility model
Except said structure part also includes the universal architecture of existing touch-control circuit, for example：Signal after enhanced processing is subsequently gone back
Need enhanced processing, or the signal before being input to gating unit is also required to corresponding processing procedure.The gating unit
Same path is merged into by the form of gating for multiple signals to be inputted, after the signal amplification unit user will merge
Signal be amplified processing.Therefore, the device that the infrared touch-control circuit is included is not restricted to above-mentioned three kinds of units,
But the main function combination by these three units is realized and substituted for more amplifier chip and analog switch in available circuit
Structure, and then reduce cost.
From above-described embodiment, the infrared touch-control circuit connects one by the output end in each infrared receiving tube
Triode carries out the amplification of signal, enabling the amplifier chip saved on every piece of receiver board；By using infrared receiving tube square
The gating unit that battle array allows all reception pipes to send signal in mainboard carries out the gating of signal, so, Ke Yijie
Save every 8 reception pipes in original technology and be required to the gating device used, while by causing multichannel analog signals parallel transmission
The efficiency of signal transacting can be improved.Therefore, infrared touch-control circuit described in the utility model can not only greatly save cost,
And the stability and efficiency of signal transacting can be improved based on the optimization to circuit.
In some optional embodiments, the gating unit includes gating module 11, the first reseting module 13, second and answered
Position module 16 and base modules 15；The signal amplification unit 12 includes the first amplification module, the second amplification module, the 3rd amplification
Module and gain module 14；Wherein, the first amplification module, the second amplification module and the 3rd amplification module be in the accompanying drawings from left to right
Or be arranged in order according to the order of signal transacting.
The input of the gating module 11 with by triode amplify signal be connected, the output end of gating module 11 and
The normal phase input end connection of first amplification module；The input of first reseting module 13 is connected with the input of gating module 11,
The output end of first reseting module 13 is connected with the inverting input of the first amplification module；The output end of the base modules 15 with
The inverting input connection of first amplification module；The output end of first amplification module is inputted with the positive of the second amplification module
End connection, the reverse inter-input-ing ending grounding of the second amplification module, the output end and the second amplification module of the second reseting module 16 are just
Phase input is connected；The Enable Pin of first reseting module 13 is connected with the Enable Pin of the second reseting module 16；Second amplification
The output end of module is connected with the normal phase input end of the 3rd amplification module, the output end of gain module 14 and the 3rd amplification module
Inverting input is connected, and signal is exported from the output end of the 3rd amplification module.Wherein, the multiple signals amplified by triode according to
Secondary different from gating module 11 input connection, similarly, the input of the first reseting module 13 successively with gating module 11
Input is connected.The gating module 11 is used to be converted to multiple signals by gating to be resetted with signal all the way, described first
The reseting module 16 of module 13 and second is used to carry out reset operation to analog signal so that all analog signals can be same
Saltus step on pedestals, can so greatly improve the uniformity of signal and the stability of signal transacting.Meanwhile, grasped by resetting
Make, the discharge time of analog signal can be reduced, the compressed signal cycle, and then touch-control frame per second is improved, namely improve scanning week
Phase.The base modules 15 are used to provide unified benchmark, and then further improve the stability and reliability of signal transacting.Institute
Stating gain module 14 is used for the gain of Regulate signal so that the signal of output can adapt to different demands.Therefore, it is described infrared
Touch-control circuit can further improve the uniformity of signal and the stability of signal transacting, while so that output signal has preferably
Adaptability.
In the utility model some optional embodiments, the gating module 11 includes analog switch 74HC4051；Institute
Stating the first reseting module 13 includes two parallel arrangement of analog switch 74HC4066；Second reseting module 16 includes module
Switch 74HC1G66；First amplification module, the second amplification module, the 3rd amplification module and base modules 15 include amplification
Device XR8054；The gain module 14 includes analog switch 74HC4051；That is, above-mentioned modules are by corresponding
Chip realizes its function.
Specifically, shown in reference picture 2：
Amplify by triode and gating is connected to by capacitances in series by the signal of infrared receiving tube Output matrix respectively
The input of module, and often pass through a resistance eutral grounding between road signal and electric capacity；The output end of gating module passes through resistance
Ground connection；The output end of the gating module is connected to the normal phase input end of the first amplification module by resistance；That is, by infrared
The signal that reception pipe matrix receives all infrared receiving tubes by connect an electric capacity be sent to 18 select 1 analog switch
In 74HC4051 8 receiving terminals X0, X1 ..., X7, and pass through resistance eutral grounding between all reception pipe signals and electric capacity；
Other pins of analog switch 74HC4051 in gating module are：VDD pins are connected to power supply, and A, B, C pin are connected to control
Signal processed,VEE, VSS are grounded, and X-tube pin is output end, and X-tube pin passes through resistance eutral grounding.
Two analog switch 74HC4066 in first reseting module select different inputs to be consecutively connected to choosing
The input of logical module, remaining input terminal is used as Enable Pin；The output end of first reseting module is connected to first by resistance and put
The inverting input of big module；Specifically, AIN/OUT, BIN/OUT, CIN/OUT, DIN/OUT pipe of a selected analog switch
The ACONTR AIN/OUT of pin and another analog switch, BCONTR BIN/OUT, CCONTR CIN/OUT, DCONTR DIN/
OUT pins are connected respectively to 8 inputs of the analog switch 74HC4051 in gating module, then by remaining input pin
S_EN ends are connected to as Enable Pin, two analog switch 74HC4066 VDD pins connect power supply, and all output pins are simultaneously
Connection is connected to the inverting input of the first amplification module.
The normal phase input end A+ of base modules is connected to power supply and ground connection, the anti-phase input of base modules by resistance respectively
End is connected by the output end of resistance and base modules, and the output end of base modules is connected with the output end of the first reseting module；
And the power pin of the amplifying device XR8054 in base modules is grounded and is connected to respectively power supply.
The inverting input of amplifying device XR8054 in first amplification module is connected by the resistance and electric capacity being arranged in parallel
The output end being connected in the output end in the first amplification module, the first amplification module passes through capacitance connection to the second amplification module
Normal phase input end；
The E pins of module switch 74HC1G66 in second reseting module 16 are used as Enable Pin and the first reseting module
Enable Pin connection in 13, VCC pins are connected to power supply, and the positive that Y pins are connected to the second amplification module as output is inputted
End, Z pins and GND pins ground connection.
The inverting input of amplifying device XR8054 in second amplification module is by a resistance eutral grounding, while by another
One resistance is connected with the output end of the second amplification module；The output end of second amplification module is connected to the 3rd amplification by resistance
The normal phase input end of module；
The inverting input of amplifying device XR8054 in 3rd amplification module is defeated by resistance and the 3rd amplification module
Go out end connection, the output end of the 3rd amplification module is exported by a resistance of connecting, and output end passes through resistance eutral grounding；
The input of gain module is respectively by resistance eutral grounding, and VDD pins are connected to power supply, and A, B, C pin are connected to
Control signal,VEE, VSS pin are grounded, and X-tube pin is output end.
Shown in reference picture 2, the 8 road signal parallel transmission from reception pipe turn via the analog switch 74HC4051 of gating
Into 1 road signal.Analog signal controls two analog switches to enter by the S_EN in reseting module before signal transmission to next stage
Row resets, and then can reduce the discharge time of analog signal, the compressed signal cycle, improves touch-control frame per second.First reseting module
The output end of analog switch in 13 is connected in the output end in base modules 15, can further improve the steady of signal transacting
It is qualitative.
Signal is amplified through the operational amplifier in signal amplification unit 12, analog switch in the second reseting module 16
Enable Pin S_EN is connected with the S_EN of analog switch in the first reseting module 13.Here S_EN control mode is, in each mould
Intend dragging down S_EN before signal input, S_EN ends level can be drawn high after the signal trailing edge of output, so as to realize every
Individual analog signal will reset operation once.
Those of ordinary skill in the art should be understood：The discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the present utility model, the above is real
Apply and can also be combined between the technical characteristic in example or non-be the same as Example, step can be realized with random order, and be deposited
In many other changes of different aspect of the present utility model as described above, for simplicity, they are provided not in details.
In addition, to simplify explanation and discussing, and in order to which the utility model indigestion will not be made, in the accompanying drawing provided
In can show or can not show to be connected with the known power ground of integrated circuit (IC) chip and other parts.In addition,
Device can be shown, to avoid making the utility model indigestion, and this have also contemplated that following facts in block diagram form,
Details i.e. on the embodiment of these block diagram arrangements is to depend highly on that platform of the present utility model will be implemented (i.e.,
These details should be completely in the range of the understanding of those skilled in the art).Elaborate detail (for example, circuit) with
In the case of describing exemplary embodiment of the present utility model, it will be apparent to those skilled in the art that can be
Implement the utility model in the case of these no details or in the case that these details are changed.Therefore, this
A little descriptions are considered as illustrative and not restrictive.
Although having been incorporated with specific embodiment of the utility model the utility model is described, before
The description in face, many replacements, modification and the modification of these embodiments will be apparent for those of ordinary skills
's.For example, other memory architectures (for example, dynamic ram (DRAM)) can use discussed embodiment.
Embodiment of the present utility model is intended to fall into all such within the broad range of appended claims
Replace, change and modification.Therefore, it is all within spirit of the present utility model and principle, any omission for being made, modification, equally
Replace, improve etc., it should be included within protection domain of the present utility model.
Claims (3)
1. a kind of infrared touch-control circuit, it is characterised in that including：Triode, gating unit and signal amplification unit；It is single infrared
The infrared signal exported in reception pipe, which is sent to after being amplified by triode in gating unit, carries out signal gating, from the choosing
The signal exported in logical unit is amplified processing by signal amplification unit；Wherein, the signal amplified by triode passes through
Infrared receiving tube Input matrix is into gating unit, and the infrared receiving tube matrix is by multichannel infrared receiving tube according to linescan method
Arrange to form receiving matrix.
2. infrared touch-control circuit according to claim 1, it is characterised in that the gating unit includes gating module, the
One reseting module, the second reseting module and base modules；The signal amplification unit includes the first amplification module, the second amplification mould
Block, the 3rd amplification module and gain module；
The input of the gating module is connected with the signal amplified by triode, the output end of gating module and the first amplification
The normal phase input end connection of module；The input of first reseting module and the input of gating module are connected, the first reseting module
Output end be connected with the inverting input of the first amplification module；The output end of the base modules is anti-with the first amplification module
Phase input is connected；The output end of first amplification module is connected with the normal phase input end of the second amplification module, the second amplification
The reverse inter-input-ing ending grounding of module, the output end of the second reseting module is connected with the normal phase input end of the second amplification module；It is described
The Enable Pin of first reseting module is connected with the Enable Pin of the second reseting module；The output end of second amplification module and the 3rd amplification
The normal phase input end connection of module, the output end of gain module is connected with the inverting input of the 3rd amplification module, and signal is from the
The output end output of three amplification modules.
3. infrared touch-control circuit according to claim 2, it is characterised in that the gating module includes analog switch；Institute
Stating the first reseting module includes two parallel arrangement of analog switches；Second reseting module includes module switch；Described
One amplification module, the second amplification module, the 3rd amplification module and base modules include amplifying device；The gain module includes
Analog switch；
Amplify by triode and gating module is connected to by capacitances in series by the signal of infrared receiving tube Output matrix respectively
Input, and per passing through a resistance eutral grounding between road signal and electric capacity；The output end of gating module passes through resistance eutral grounding；
The output end of the gating module is connected to the normal phase input end of the first amplification module by resistance；
Two analog switches in first reseting module select different inputs to be consecutively connected to the input of gating module
End, remaining input terminal is used as Enable Pin；The output end of first reseting module is connected to the anti-phase of the first amplification module by resistance
Input；
The normal phase input end of base modules is connected to power supply and ground connection by resistance respectively, and the inverting input of base modules passes through
The output end connection of resistance and base modules, the output end of base modules is connected with the output end of the first reseting module；
Inverting input in first amplification module is by the resistance and capacitance connection that are arranged in parallel into the first amplification module
The normal phase input end that output end in output end, the first amplification module passes through capacitance connection to the second amplification module；
The inverting input of second amplification module is by a resistance eutral grounding, while passing through another resistance and the second amplification module
Output end connection；The output end of second amplification module is connected to the normal phase input end of the 3rd amplification module by resistance；
The inverting input of 3rd amplification module is connected by resistance with the output end of the 3rd amplification module, the 3rd amplification module
Output end is exported by a resistance of connecting, and output end passes through resistance eutral grounding；
The input of gain module respectively passes through resistance eutral grounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621323733.XU CN206331395U (en) | 2016-12-05 | 2016-12-05 | A kind of infrared touch-control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621323733.XU CN206331395U (en) | 2016-12-05 | 2016-12-05 | A kind of infrared touch-control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206331395U true CN206331395U (en) | 2017-07-14 |
Family
ID=59288577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621323733.XU Withdrawn - After Issue CN206331395U (en) | 2016-12-05 | 2016-12-05 | A kind of infrared touch-control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206331395U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108170302A (en) * | 2016-12-05 | 2018-06-15 | 深圳市鸿合创新信息技术有限责任公司 | A kind of infrared touch-control circuit |
| CN110442272A (en) * | 2019-07-08 | 2019-11-12 | 广州华欣电子科技有限公司 | A kind of driving circuit of infrared signal, processing circuit and infrared touch panel |
-
2016
- 2016-12-05 CN CN201621323733.XU patent/CN206331395U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108170302A (en) * | 2016-12-05 | 2018-06-15 | 深圳市鸿合创新信息技术有限责任公司 | A kind of infrared touch-control circuit |
| CN108170302B (en) * | 2016-12-05 | 2024-01-30 | 深圳市鸿合创新信息技术有限责任公司 | Infrared touch circuit |
| CN110442272A (en) * | 2019-07-08 | 2019-11-12 | 广州华欣电子科技有限公司 | A kind of driving circuit of infrared signal, processing circuit and infrared touch panel |
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