CN110442272A - A kind of driving circuit of infrared signal, processing circuit and infrared touch panel - Google Patents
A kind of driving circuit of infrared signal, processing circuit and infrared touch panel Download PDFInfo
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- CN110442272A CN110442272A CN201910611454.5A CN201910611454A CN110442272A CN 110442272 A CN110442272 A CN 110442272A CN 201910611454 A CN201910611454 A CN 201910611454A CN 110442272 A CN110442272 A CN 110442272A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
Abstract
The invention discloses a kind of driving circuits of infrared signal, comprising: D/A conversion unit, control module, impedance inverter circuit, the first amplifying circuit, the second amplifying circuit, switching circuit；The control terminal of control module is connect with the controlled end of the controlled end of infrared signal transmission circuit and switching circuit respectively, control module, D/A conversion unit, impedance inverter circuit and the first amplifying circuit are sequentially connected, the output end of first amplifying circuit is connect with the controlled end of the second amplifying circuit, the input terminal of second amplifying circuit and the output end of infrared signal transmission circuit connect, the output end of second amplifying circuit is grounded, the input terminal of switching circuit is connected between the output end of the first amplifying circuit and the controlled end of the second amplifying circuit, the output end of switching circuit is connect with the output end of the second amplifying circuit.The invention also discloses the processing circuit of infrared signal and infrared touch panels.Solve that infrared touch frame scan frequency is low, so that the problem of the writing effect difference of infrared touch panel.
Description
Technical field
The present invention relates to infrared touch technical field more particularly to a kind of driving circuit of infrared signal, processing circuit and
Infrared touch panel.
Background technique
Referring to Fig. 1, the processing circuit of the current infrared signal in infrared touch panel is frequently with M row * N column matrix structure, such as
8 row * 8 column etc.；In upper figure, when circuit works normally, that is, when choosing the first row in emission matrix structure, due to this
The anode of infrared-emitting diode in row has been loaded voltage VCC1 as illustrated in the drawing, thus by decoder according to
The cathode and current bus I pwr of infrared transmitting tube can be realized in secondary output impulse level gated on power triode Qn1~Qn8
Connection, and the size of infrared transmitting tube radiation intensity is then the displacement exported by microcontroller operation serial input-parallel
Register die gates N-type metal-oxide-semiconductor QA1~QA8, to obtain the resistance of different resistance value sizes, obtains different electricity
Stream.But this control shift register selects the modes of different resistance, realizes that the speed of different radiation intensity is slower；With
For selecting resistance R1, R3, R4, R8, microcontroller needs to sequentially input data 1,011 0001, simultaneously turns on later and resistance
The corresponding N-type metal-oxide-semiconductor of connection, and each input requires successively operation clock signal CLK and realizes, so that infrared touching
The scan frequency for touching frame is low, so that the writing effect of infrared touch panel is poor.
Summary of the invention
The purpose of the embodiment of the present invention is that a kind of driving circuit of infrared signal, processing circuit and infrared touch panel are provided,
It can effectively solve that infrared touch frame scan frequency in the prior art is low, so that the writing effect difference of infrared touch panel is asked
Topic.
To achieve the above object, the embodiment of the invention provides a kind of driving circuits of infrared signal, comprising: for holding
The D/A conversion units of the different low currents of continuous output, control module, switching circuit, impedance inverter circuit, the first amplifying circuit,
Second amplifying circuit；
The control terminal of the control module is connect with the controlled end of the infrared signal transmission circuit, the control module
Output end connect with the input terminal of the D/A conversion unit, the output end of the D/A conversion unit and the impedance turn
Change the input terminal connection of circuit；
The input terminal of first amplifying circuit is connect with the output end of the impedance inverter circuit；First amplification
The output end of circuit is connect with the controlled end of second amplifying circuit, the input terminal of second amplifying circuit with it is described red
The output end of external signal transmit circuit connects, the output end ground connection of second amplifying circuit；
The input terminal of the switching circuit is connected to the output end and second amplifying circuit of first amplifying circuit
Controlled end between, the output end of the switching circuit is connect with the output end of second amplifying circuit, the switching circuit
Controlled end connect with the control terminal of the control module；
Wherein, when the infrared-emitting diode in the infrared signal transmission circuit works, the control module controls institute
It states switching circuit and is in off state, when the infrared-emitting diode in the infrared signal transmission circuit does not work, the control
It is in the conductive state that molding block controls the switching circuit.
As an improvement of the above scheme, first amplifying circuit includes: the first NPN type triode, first resistor,
Two resistance, 3rd resistor and the 4th resistance；
The base stage of first NPN type triode is connect with the impedance inverter circuit, first NPN type triode
Collector connect by the first resistor with the first power supply, the emitter of first NPN type triode passes through described the
Four resistance eutral groundings；
The first end of the 3rd resistor is connected to the emitter and the 4th resistance of first NPN type triode
Between, the second end of the 3rd resistor is connect with the controlled end of second amplifying circuit；
The first end of the second resistance is connected to the base stage and impedance transformation electricity of first NPN type triode
Between road, the second end of the second resistance is grounded.
As an improvement of the above scheme, second amplifying circuit includes: the second NPN type triode；
The base stage of second NPN type triode is connect with the 3rd resistor, the collection of second NPN type triode
Electrode is connect with the output end of the infrared signal transmission circuit, the emitter ground connection of second NPN type triode.
As an improvement of the above scheme, the impedance inverter circuit includes: voltage buffer；
The non-inverting input terminal of the voltage buffer is connect with the output end of the D/A conversion unit, and the voltage is slow
The output end for rushing device is connect with the input terminal of first amplifying circuit, and the inverting input terminal of the voltage buffer is connected to
Between the output end of the voltage buffer and the input terminal of first amplifying circuit；
First power end of the voltage buffer is connect with second source, the second source end of the voltage buffer
Ground connection.
As an improvement of the above scheme, the switching circuit includes: N-type metal-oxide-semiconductor and the 5th resistance；
The grid of the N-type metal-oxide-semiconductor is connect with the control terminal of the control module, the drain electrode connection of the N-type metal-oxide-semiconductor
Between the output end of first amplifying circuit and the controlled end of second amplifying circuit, the source electrode of the N type metal-oxide-semiconductor
Ground connection；
5th resistance is connected between the grid of the N-type metal-oxide-semiconductor and the source electrode of the N-type metal-oxide-semiconductor.
Compared with prior art, the driving circuit of the infrared signal disclosed by the embodiments of the present invention, when infrared signal is sent out
When infrared-emitting diode in transmit-receive radio road works normally, control module control switch circuit cut-off, control module controls digital-to-analogue
Converting unit persistently exports different low currents and flows into impedance inverter circuit, to enhance the electric current of D/A conversion unit output
Driving capability, the electric current that the first amplifying circuit exports impedance inverter circuit amplifies, the electricity of the first amplifying circuit output
Stream flows into the second amplifying circuit by the second amplifying circuit controlled end, so that the second amplifying circuit puts the electric current of inflow
Greatly.
N-type metal-oxide-semiconductor is gated respectively without using shift register, different size of electric current can be directly obtained,
To realize the control of infrared-emitting diode radiation intensity size.
When the infrared-emitting diode in infrared signal transmission circuit does not work, control module control switch circuit is led
Logical, control module control D/A conversion unit persistently exports different low currents and flows into impedance inverter circuit, to enhance digital-to-analogue
The driving capability of the electric current of converting unit output, electric current are amplified by the first amplifying circuit, and amplified electric current is by opening
Powered-down road is discharged into ground, so that work hours mould converting unit can also be in infrared touch frame in infrared-emitting diode
Low current is constantly exported in scan period, scan frequency is improved, to effectively improve writing effect.
The embodiment of the invention also provides a kind of processing circuits of infrared signal, comprising: infrared signal transmission circuit and
The driving circuit of the infrared signal；
The controlled end of the infrared signal transmission circuit is connect with the control terminal of the driving circuit of the infrared signal, institute
The input terminal for stating the output end of infrared signal transmission circuit and the second amplifying circuit in the driving circuit of the infrared signal connects
It connects, the input terminal of the infrared signal transmission circuit is connect with third power supply.
As an improvement of the above scheme, the infrared signal transmission circuit includes: infrared-emitting diode array and institute
State the one-to-one NPN type triode array of infrared-emitting diode array and decoder；
The anode of diode in the infrared-emitting diode array is connect with the third power supply, described infrared
The cathode correspondence of diode is connect with the collector of the triode in the NPN type triode array in Emission Diode Array,
In the NPN type triode array emitter of triode with the second amplifying circuit in the driving circuit of the external signal
Input terminal connection, the base stage of the triode in the NPN type triode array connect with the output end of decoder respectively；
The enable end of the decoder is connect with the control terminal of the driving circuit of the infrared signal.
Compared with prior art, the processing circuit of the infrared signal disclosed by the embodiments of the present invention, due to infrared
When signal transmission circuit does not work, the D/A conversion unit in the driving circuit of infrared signal can also be held within the scan period
Continuous output low current, improves scan frequency, to effectively improve writing effect.
The embodiment of the invention also provides a kind of infrared touch panels, comprising: the processing circuit of the infrared signal.
Compared with prior art, infrared touch panel disclosed by the embodiments of the present invention, due to using above-mentioned infrared signal
Processing circuit improves scan frequency, to effectively improve writing effect.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the processing circuit of infrared signal in one embodiment of the invention；
Fig. 2 is a kind of concrete structure schematic diagram of the processing circuit of infrared signal in one embodiment of the invention；
Fig. 3 is a kind of concrete structure schematic diagram of the driving circuit of infrared signal in one embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Referring to fig. 2, be a kind of infrared signal provided in an embodiment of the present invention processing circuit structural schematic diagram.
A kind of driving circuit of infrared signal, comprising: for persistently exporting D/A conversion unit 2, the control mould of low current
Block 1, switching circuit 6, impedance inverter circuit 3, the first amplifying circuit 4, the second amplifying circuit 5.
In the present embodiment, control module 1 is microcontroller, can also be other control circuits, not do specific limit herein
Fixed, D/A conversion unit 2 is set to microcontroller.
The control terminal of the control module 1 is connect with the controlled end of the infrared signal transmission circuit, the control module
1 output end is connect with the input terminal of the D/A conversion unit 2, the output end of the D/A conversion unit 2 and the impedance
The input terminal of conversion circuit 3 connects.
The input terminal of first amplifying circuit 4 is connect with the output end of the impedance inverter circuit 3；Described first puts
The output end of big circuit 4 is connect with the controlled end of second amplifying circuit 5, the input terminal of second amplifying circuit 5 and institute
State the output end connection of infrared signal transmission circuit, the output end ground connection of second amplifying circuit 5.
The input terminal of the switching circuit 6 is connected to the output end and the second amplification electricity of first amplifying circuit 4
Between the controlled end on road 5, the output end of the switching circuit 6 is connect with the output end of second amplifying circuit 5, described to open
The controlled end on powered-down road 6 is connect with the control terminal of the control module 1.
Wherein, when the infrared-emitting diode in the infrared signal transmission circuit works, the control module 1 is controlled
The switching circuit 6 is in off state, when the infrared-emitting diode in the infrared signal transmission circuit does not work, institute
Stating control module 1, to control the switching circuit 6 in the conductive state.
Working principle: when the infrared-emitting diode in infrared signal transmission circuit works normally, control module 1 is controlled
Switching circuit 6 processed ends, and control module 1 controls D/A conversion unit 2 and persistently exports different low current inflow impedance transformation electricity
Road 3, to enhance the driving capability of the electric current of the output of D/A conversion unit 3, the first amplifying circuit 4 is defeated to impedance inverter circuit 3
Electric current out amplifies, and the electric current of the first amplifying circuit 4 output flows into the second amplification by 5 controlled end of the second amplifying circuit
Circuit 5, so that the electric current of 5 pairs of the second amplifying circuit inflows amplifies.Without using shift register respectively to N-type metal-oxide-semiconductor
It is gated, different size of electric current can be directly obtained, to realize the control of infrared-emitting diode radiation intensity size
System.
When the infrared-emitting diode in infrared signal transmission circuit does not work, 1 control switch circuit 6 of control module
Conducting, control module 1 controls D/A conversion unit 2 and persistently exports different low current inflow impedance inverter circuits 3, to increase
The driving capability for the electric current that strong D/A conversion unit 2 exports, electric current are amplified by the first amplifying circuit 4, amplified electricity
Stream is discharged into ground by switching circuit 6, so that work hours mould converting unit 2 can also be not red in infrared-emitting diode
Low current is constantly exported in the scan period of outer touching box, scan frequency is improved, to effectively improve writing effect.
Referring to Fig. 3, as an improvement of the above scheme, first amplifying circuit 4 include: the first NPN type triode QP1,
First resistor RA1, second resistance RA2,3rd resistor RA3 and the 4th resistance RA4.
The base stage of the first NPN type triode QP1 is connect with the impedance inverter circuit 3, the first NPN type three
The collector of pole pipe QP1 is connect by the first resistor RA1 with the first power supply VCC1, the first NPN type triode QP1
Emitter pass through the 4th resistance RA4 be grounded.
The first end of the 3rd resistor RA3 is connected to the emitter and described the of the first NPN type triode QP1
Between four resistance RA4, the second end of the 3rd resistor RA3 is connect with the controlled end of second amplifying circuit 5.
The first end of the second resistance RA2 is connected to the base stage and the impedance of the first NPN type triode QP1
Between conversion circuit 3, the second end of the second resistance RA2 is grounded.
Specifically, when the infrared-emitting diode in infrared signal transmission circuit works normally, D/A conversion unit 2
Continuous output low current carries out first time amplification by the first NPN type triode QP1, amplifies for the first time by impedance inverter circuit 3
Electric current afterwards carries out secondary amplification by the second amplifying circuit 5, to realize the control of infrared-emitting diode radiation intensity size
System.
When the infrared-emitting diode in infrared signal transmission circuit does not work, by the first NPN type triode QP1 into
Amplified electric current passes through switching circuit 6 with being released to row for the first time, improves scan frequency, is effectively improved writing effect.
Referring to Fig. 3, as an improvement of the above scheme, second amplifying circuit 5 includes: the second NPN type triode QP2,
It can also be metal-oxide-semiconductor, be not limited to NPN type triode.
The base stage of the second NPN type triode QP2 is connect with the 3rd resistor RA3, three pole of the 2nd NPN type
The collector of pipe QP2 is connect with the output end of the infrared signal transmission circuit, the transmitting of the second NPN type triode QP2
Pole ground connection.
Specifically, when in infrared signal transmission circuit infrared-emitting diode work normally when, switching circuit 6 by,
Since the base stage of the second NPN type triode QP2 passes through the QP1 connection of the first NPN type triode of 3rd resistor RA3, the second NPN type
The collector of triode QP2 and the output end of infrared signal transmission circuit connect, and the second NPN type triode QP2 conducting will be electric
Stream carries out secondary amplification, to realize the control of infrared-emitting diode radiation intensity size.
Referring to Fig. 3, as an improvement of the above scheme, the impedance inverter circuit 3 includes: voltage buffer.
The non-inverting input terminal of the voltage buffer is connect with the output end of the D/A conversion unit 2, and the voltage is slow
The output end for rushing device is connect with the input terminal of first amplifying circuit 4, and the inverting input terminal of the voltage buffer is connected to
Between the output end of the voltage buffer and the input terminal of first amplifying circuit 4.
First power end of the voltage buffer is connect with second source VCC2, the second electricity of the voltage buffer
Source ground connection.
Specifically, voltage buffer/voltage follower connection D/A conversion unit 2 output end, voltage buffer output
Identical Current amplifier module in every piece of transmitting board of end connection, converts feature using the impedance of voltage buffer, enhances small
The driving capability of electric current；First amplifying circuit 4, the second amplifying circuit 5 are to from D/A conversion unit 2 and by voltage buffer
The low current of device amplifies, to realize the control of infrared transmitting tube radiation intensity size.
Referring to Fig. 3, as an improvement of the above scheme, the switching circuit 6 includes: N-type metal-oxide-semiconductor QN1 and the 5th resistance
RA5.The switching circuit 6 can also be triode, analog switch etc..
The grid of the N-type metal-oxide-semiconductor is connect with the control terminal of the control module 1, the drain electrode connection of the N-type metal-oxide-semiconductor
Between the output end of first amplifying circuit 4 and the controlled end of second amplifying circuit 5, the source of the N-type metal-oxide-semiconductor
Pole ground connection.
The 5th resistance RA5 is connected between the grid of the N-type metal-oxide-semiconductor and the source electrode of the N-type metal-oxide-semiconductor.
Specifically, due to switching circuit 6 infrared-emitting diode work normally when be in off state, first
Electric current is input to the second amplifying circuit 5 by amplifying circuit 4；It is in the conductive state when infrared-emitting diode is idle,
The electric current of first amplifying circuit, 4 output end is released to ground, and D/A conversion unit 2 is not required to work in infrared-emitting diode
When just export electric current, infrared-emitting diode not work hours mould converting unit 2 can also within the entire scan period it is continuous
Different low currents is constantly exported, therefore improves scan frequency, effectively improves writing effect.
The embodiment of the invention also provides a kind of processing circuits of infrared signal, comprising: infrared signal transmission circuit and
The driving circuit of the infrared signal.
The controlled end of the infrared signal transmission circuit is connect with the control terminal of the driving circuit of the infrared signal, institute
State the input terminal of the second amplifying circuit 5 in the output end of infrared signal transmission circuit and the driving circuit of the infrared signal
Connection, the input terminal of the infrared signal transmission circuit are connect with third power supply VCC3.
As an improvement of the above scheme, the infrared signal transmission circuit includes: infrared-emitting diode array and institute
State the one-to-one NPN type triode array of infrared-emitting diode array and decoder 7.
The anode of diode in the infrared-emitting diode array is connect with the third power supply VCC3, described
The corresponding collector with the triode in the NPN type triode array of the cathode of diode in infrared-emitting diode array
It connects, the emitter of triode amplifies with second in the driving circuit of the external signal in the NPN type triode array
The input terminal of circuit 5 connects, and the base stage of the triode in the NPN type triode array connects with the output end of decoder 7 respectively
It connects.
The enable end of the decoder 7 is connect with the control terminal of the driving circuit of the infrared signal.
Specifically, the enable end of the controlled end of switching circuit 6 and decoder 7 is used in conjunction with the same port I/O, is not necessarily to volume
Outer microcontroller I/O resource.
Compared with prior art, the infrared signal processing circuit disclosed by the embodiments of the present invention, due in infrared letter
When number transmit circuit does not work, the D/A conversion unit in the driving circuit of infrared signal can also continue within the scan period
Low current is exported, scan frequency is improved, to effectively improve writing effect.
The first amplification electricity again since infrared signal transmission circuit is on a board, in the driving circuit of infrared signal
On the same board, the current bus in every piece of board is only left at this plate for road, the second amplifying circuit and switching circuit, electricity
Stream signal is returned directly to the ground level of this plate, transmits and is not present between the transmitting board and board of the infrared signal of whole system
The interference to photosensitive receiving tube signal is effectively reduced so as to shorten the return flow path of pulse current in pulse current.
The embodiment of the invention also provides a kind of infrared touch panels, comprising: the processing circuit of the infrared signal.
Compared with prior art, infrared touch panel disclosed by the embodiments of the present invention, due to using above-mentioned infrared signal
Processing circuit improves scan frequency, to effectively improve writing effect.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also regard
For protection scope of the present invention.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also regard
For protection scope of the present invention.
Claims (8)
1. a kind of driving circuit of infrared signal characterized by comprising for persistently exporting the digital-to-analogue conversion of different low currents
Unit, control module, switching circuit, impedance inverter circuit, the first amplifying circuit, the second amplifying circuit；
The controlled end of the control terminal of the control module and infrared signal transmission circuit connects, the output end of the control module with
The input terminal of the D/A conversion unit connects, the input of the output end of the D/A conversion unit and the impedance inverter circuit
End connection；
The input terminal of first amplifying circuit is connect with the output end of the impedance inverter circuit；First amplifying circuit
Output end is connect with the controlled end of second amplifying circuit, and the input terminal of second amplifying circuit and the infrared signal are sent out
The output end of transmit-receive radio road connects, the output end ground connection of second amplifying circuit；
The input terminal of the switching circuit be connected to first amplifying circuit output end and second amplifying circuit by
Control end between, the output end of the switching circuit is connect with the output end of second amplifying circuit, the switching circuit by
Control end is connect with the control terminal of the control module；
Wherein, it when the infrared-emitting diode in the infrared signal transmission circuit works, is opened described in the control module control
Powered-down road is in off state, when the infrared-emitting diode in the infrared signal transmission circuit does not work, the control mould
It is in the conductive state that block controls the switching circuit.
2. the driving circuit of infrared signal as described in claim 1, which is characterized in that first amplifying circuit includes:
One NPN type triode, first resistor, second resistance, 3rd resistor and the 4th resistance；
The base stage of first NPN type triode is connect with the impedance inverter circuit, the current collection of first NPN type triode
Pole is connect by the first resistor with the first power supply, and the emitter of first NPN type triode passes through the 4th resistance
Ground connection；
The first end of the 3rd resistor is connected between the emitter of first NPN type triode and the 4th resistance,
The second end of the 3rd resistor is connect with the controlled end of second amplifying circuit；
The first end of the second resistance be connected to first NPN type triode base stage and the impedance inverter circuit it
Between, the second end of the second resistance is grounded.
3. the driving circuit of infrared signal as described in claim 1, which is characterized in that second amplifying circuit includes:
Two NPN type triodes；
The base stage of second NPN type triode is connect with the 3rd resistor, the collector of second NPN type triode with
The output end of the infrared signal transmission circuit connects, the emitter ground connection of second NPN type triode.
4. the driving circuit of infrared signal as described in claim 1, which is characterized in that the impedance inverter circuit includes: electricity
Compression buffer；
The non-inverting input terminal of the voltage buffer is connect with the output end of the D/A conversion unit, the voltage buffer
Output end is connect with the input terminal of first amplifying circuit, and the inverting input terminal of the voltage buffer is connected to the voltage
Between the output end of buffer and the input terminal of first amplifying circuit；
First power end of the voltage buffer is connect with second source, the second source end ground connection of the voltage buffer.
5. the driving circuit of infrared signal as described in claim 1, which is characterized in that the switching circuit includes: N-type MOS
Pipe and the 5th resistance；
The grid of the N-type metal-oxide-semiconductor is connect with the control terminal of the control module, and the drain electrode of the N-type metal-oxide-semiconductor is connected to described
Between the output end of first amplifying circuit and the controlled end of second amplifying circuit, the source electrode of the N-type metal-oxide-semiconductor is grounded；
5th resistance is connected between the grid of the N-type metal-oxide-semiconductor and the source electrode of the N-type metal-oxide-semiconductor.
6. a kind of processing circuit of infrared signal characterized by comprising infrared signal transmission circuit and such as claim 1-
The driving circuit of infrared signal described in 5；
The controlled end of the infrared signal transmission circuit is connect with the control terminal of the driving circuit of the infrared signal, described infrared
The output end of signal transmission circuit is connect with the input terminal of the second amplifying circuit in the driving circuit of the infrared signal, described
The input terminal of infrared signal transmission circuit is connect with third power supply.
7. the processing circuit of infrared signal as claimed in claim 6, which is characterized in that the infrared signal transmission circuit packet
Include: infrared-emitting diode array, with the one-to-one NPN type triode array of the infrared-emitting diode array and translate
Code device；
The anode of diode in the infrared-emitting diode array is connect with the third power supply, the infrared emission two
The cathode correspondence of diode is connect with the collector of the triode in the NPN type triode array in pole pipe array, the NPN
Input terminal of the emitter of triode with the second amplifying circuit in the driving circuit of the external signal in type triode array
It connects, the base stage of the triode in the NPN type triode array is connect with the output end of decoder respectively；
The enable end of the decoder is connect with the control terminal of the driving circuit of the infrared signal.
8. a kind of infrared touch panel characterized by comprising the processing circuit of the infrared signal as described in claim 6-7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910611454.5A CN110442272A (en) | 2019-07-08 | 2019-07-08 | A kind of driving circuit of infrared signal, processing circuit and infrared touch panel |
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|---|---|---|---|
| CN201910611454.5A CN110442272A (en) | 2019-07-08 | 2019-07-08 | A kind of driving circuit of infrared signal, processing circuit and infrared touch panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552969A (en) * | 2021-07-27 | 2021-10-26 | 高创(苏州)电子有限公司 | Infrared transmitter, receiver, touch device and touch display device |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4542332A (en) * | 1982-12-28 | 1985-09-17 | U.S. Philips Corporation | Precision current-source arrangement |
| 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 |
| JP2003243711A (en) * | 2002-02-20 | 2003-08-29 | Smk Corp | Infrared emitting diode drive circuit for remote control transmitter |
| TW201137593A (en) * | 2010-04-22 | 2011-11-01 | Univ Lunghwa Sci & Technology | Input interface signal detection circuit for power management of LCD TV |
| TW201141060A (en) * | 2010-05-10 | 2011-11-16 | Au Optronics Corp | Input signal detecting circuit and liquid crystal television thereof |
| CN102736799A (en) * | 2012-06-15 | 2012-10-17 | 中航华东光电有限公司 | Infrared touch screen driven by constant current source and constant current source driving circuit |
| CN103116299A (en) * | 2013-01-17 | 2013-05-22 | 杭州电子科技大学 | Infrared transmitting tube constant current drive circuit for thickness of yarn detection |
| CN103324363A (en) * | 2013-07-15 | 2013-09-25 | 广州视睿电子科技有限公司 | Photoelectric signal processing device and infrared touch screen |
| CN104605838A (en) * | 2015-01-19 | 2015-05-13 | 深圳市元征科技股份有限公司 | Heart rate detection method and device |
| CN206331395U (en) * | 2016-12-05 | 2017-07-14 | 深圳市鸿合创新信息技术有限责任公司 | A kind of infrared touch-control circuit |
| CN207518565U (en) * | 2017-11-06 | 2018-06-19 | 广州钛启信息科技有限公司 | A kind of metal-oxide-semiconductor switching circuit |
-
2019
- 2019-07-08 CN CN201910611454.5A patent/CN110442272A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4542332A (en) * | 1982-12-28 | 1985-09-17 | U.S. Philips Corporation | Precision current-source arrangement |
| 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 |
| JP2003243711A (en) * | 2002-02-20 | 2003-08-29 | Smk Corp | Infrared emitting diode drive circuit for remote control transmitter |
| TW201137593A (en) * | 2010-04-22 | 2011-11-01 | Univ Lunghwa Sci & Technology | Input interface signal detection circuit for power management of LCD TV |
| TW201141060A (en) * | 2010-05-10 | 2011-11-16 | Au Optronics Corp | Input signal detecting circuit and liquid crystal television thereof |
| CN102736799A (en) * | 2012-06-15 | 2012-10-17 | 中航华东光电有限公司 | Infrared touch screen driven by constant current source and constant current source driving circuit |
| CN103116299A (en) * | 2013-01-17 | 2013-05-22 | 杭州电子科技大学 | Infrared transmitting tube constant current drive circuit for thickness of yarn detection |
| CN103324363A (en) * | 2013-07-15 | 2013-09-25 | 广州视睿电子科技有限公司 | Photoelectric signal processing device and infrared touch screen |
| CN104605838A (en) * | 2015-01-19 | 2015-05-13 | 深圳市元征科技股份有限公司 | Heart rate detection method and device |
| CN206331395U (en) * | 2016-12-05 | 2017-07-14 | 深圳市鸿合创新信息技术有限责任公司 | A kind of infrared touch-control circuit |
| CN207518565U (en) * | 2017-11-06 | 2018-06-19 | 广州钛启信息科技有限公司 | A kind of metal-oxide-semiconductor switching circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552969A (en) * | 2021-07-27 | 2021-10-26 | 高创(苏州)电子有限公司 | Infrared transmitter, receiver, touch device and touch display device |
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