CN204613904U - A kind of handset touch panel circuit - Google Patents
A kind of handset touch panel circuit Download PDFInfo
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- CN204613904U CN204613904U CN201520235598.2U CN201520235598U CN204613904U CN 204613904 U CN204613904 U CN 204613904U CN 201520235598 U CN201520235598 U CN 201520235598U CN 204613904 U CN204613904 U CN 204613904U
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Abstract
The utility model relates to a kind of handset touch panel circuit, comprise central processing system, serial paralled interface, touch-screen exciting signal source, automatic zero set (AZS), coupling capacitance, integrator, amplification filtering, detuner, current detecting, transformer, touch-screen and multi-way switch, described serial paralled interface, touch-screen exciting signal source is all connected with central processing system with automatic zero set (AZS), the first end of described transformer is connected with touch-screen by multi-way switch, second end of described transformer is connected with detuner by electric current electrical measurement, 3rd end of described transformer is connected with automatic zero set (AZS) and touch-screen with multi-way switch respectively by coupling capacitance, this handset touch panel circuit decreases in the absence of a touch by automatic zero set (AZS) circuit, due to the measuring error that the error of components and parts causes, adjusted the oscillation frequency of control first paster integrated circuit by A/D conversion and frequency simultaneously, avoid the sweep signal interference of handset touch panel.
Description
Technical field
The utility model relates to a kind of handset touch panel circuit.
Background technology
On present mobile phone market, touch-screen mobile phone has become the leading of present mobile phone market, so the quality of touch-screen, decides the market share of mobile phone.
Now touch-screen mobile phone commercially, generally all also exists, there is two large problems.One is the signal disturbing of mobile phone self; Two is touching in situation nowhere, due to the reason such as error of components and parts, result in and creates interference current signal, thus cause measuring error.
Utility model content
The technical problems to be solved in the utility model is: in order to overcome the deficiency of prior art self poor anti jamming capability and regulating power difference, provides a kind of and has the handset touch panel circuit improving self antijamming capability and automatic zero set (AZS) function.
The utility model solves the technical scheme that its technical matters adopts: a kind of handset touch panel circuit, comprise central processing system, serial paralled interface, touch-screen exciting signal source, automatic zero set (AZS), coupling capacitance, integrator, amplification filtering, detuner, current detecting, transformer, touch-screen and multi-way switch, described serial paralled interface, touch-screen exciting signal source is all connected with central processing system with automatic zero set (AZS), the first end of described transformer is connected with touch-screen by multi-way switch, second end of described transformer is connected with detuner by electric current electrical measurement, 3rd end of described transformer is connected with automatic zero set (AZS) and touch-screen with multi-way switch respectively by coupling capacitance, the five terminal of described transformer is connected with touch-screen exciting signal source, 4th end ground connection of described transformer, described detuner is connected with touch-screen exciting signal source and amplification filtering respectively, described amplification filtering is connected with touch-screen exciting signal source by integrator,
Described touch-screen exciting signal source comprises frequency adjustment, signal generator, power amplification and A/D conversion, described frequency adjustment is connected with central processing system, described signal generator is connected with detuner, described power amplification is connected with the five terminal of transformer, described A/D conversion adjusts sum-product intergrator with frequency respectively and is connected, and described frequency adjustment is connected with power amplification by signal generator;
Described frequency adjustment comprises the second paster integrated circuit, 3rd paster integrated circuit, 3rd resistance, 4th resistance, 5th resistance and the second electric capacity, the reverse inter-input-ing ending grounding of described 3rd paster integrated circuit, the in-phase input end of described 3rd paster integrated circuit is connected with the output terminal of the 3rd paster integrated circuit by the second electric capacity, the output terminal of described 3rd paster integrated circuit is connected with the in-phase input end of the second paster integrated circuit by the 5th resistance, the in-phase input end of described second paster integrated circuit is connected with the output terminal of the second paster integrated circuit by the 4th resistance, the inverting input of described second paster integrated circuit is connected with the 3rd resistance,
Described A/D conversion comprises the 4th paster integrated circuit, described 4th paster integrated circuit and the second Capacitance parallel connection;
Described signal generator comprises the first paster integrated circuit, first resistance, second resistance and the first electric capacity, 7th end of described first paster integrated circuit is connected with the output terminal of the second paster integrated circuit, 8th end of described first paster integrated circuit is connected with the in-phase input end of the second paster integrated circuit by the 3rd resistance, the first end of described first paster integrated circuit is by the external DC voltage power supply of the first electric capacity-12V, the external DC voltage power supply 12V of 6th end of described first paster integrated circuit, the five terminal of described first paster integrated circuit and the 7th end are respectively by the first resistance and the external DC voltage power supply 12V of the second resistance,
Described power amplification comprises the 3rd electric capacity, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, 11 resistance, 12 resistance, 13 resistance, 14 resistance, 15 resistance, 16 resistance, 17 resistance, first triode, second triode and the 5th paster integrated circuit, the in-phase input end of described 5th paster integrated circuit is connected with the second end of the first paster integrated circuit by the 6th resistance, the inverting input of described 5th paster integrated circuit is respectively by the 7th resistance and the 8th resistance external DC voltage power supply 12V and DC voltage power supply-12V, the inverting input of described 5th paster integrated circuit is connected with the 3rd electric capacity by the 9th resistance, the output terminal of described 5th paster integrated circuit passes through the external DC voltage power supply of the series circuit-12V of the 11 resistance and the 12 resistance, the output terminal of described 5th paster integrated circuit passes through the external DC voltage power supply 12V of series circuit of the tenth resistance and the 15 resistance, the emitter of described first triode is all connected with the 9th resistance and the 3rd electric capacity junction with the 13 resistance respectively by the 14 resistance with the emitter of the second triode, the collector of described first triode is by the external DC voltage power supply 12V of the 16 resistance, the base stage of described first triode is connected with the junction of the tenth resistance and the 15 resistance, the collector of described second triode is by the external DC voltage power supply of the 17 resistance-12V, the base stage of described second triode is connected with the junction of the 11 resistance and the 12 resistance.
Particularly, in order to improve the reliability of circuit, the model of described first paster integrated circuit is IC8038, and the model of described second paster integrated circuit, the 3rd paster integrated circuit and the 5th paster integrated circuit is LMV324, and the model of described 4th paster integrated circuit is AD7524.
The beneficial effects of the utility model are, this handset touch panel circuit decreases in the absence of a touch by automatic zero set (AZS) circuit, due to the measuring error that the error of components and parts causes, adjusted the oscillation frequency of control first paster integrated circuit simultaneously by A/D conversion and frequency, avoid the sweep signal interference of handset touch panel.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the electrical block diagram of the utility model handset touch panel circuit;
Fig. 2 is the circuit theory diagrams of the touch-screen exciting signal source of the utility model handset touch panel circuit;
In figure: 1. central processing system, 2. serial paralled interface, 3. frequency adjustment, 4. signal generator, 5. power amplification, 6. coupling capacitance, 7. automatic zero set (AZS), 8. integrator, 9.A/D changes, 10. amplification filtering, 11. detuners, 12. current detecting, 13. transformers, 14. touch-screens, 15. multi-way switchs, R1. the first resistance, R2. the second resistance, R3. the 3rd resistance, R4. the 4th resistance, R5. the 5th resistance, R6. the 6th resistance, R7. the 7th resistance, R8. the 8th resistance, R9. the 9th resistance, R10. the tenth resistance, R11. the 11 resistance, R12. the 12 resistance, R13. the 13 resistance, R14. the 14 resistance, R15. the 15 resistance, R16. the 16 resistance, R17. the 17 resistance, C1. the first electric capacity, C2. the second electric capacity, C3. the 3rd electric capacity, Q1. the first triode, Q2. the second triode, U1. the first paster integrated circuit, U2. the second paster integrated circuit, U3. the 3rd paster integrated circuit, U4. the 4th paster integrated circuit, U5. the 5th paster integrated circuit.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
As depicted in figs. 1 and 2, a kind of handset touch panel circuit, comprise central processing system 1, serial paralled interface 2, touch-screen exciting signal source, automatic zero set (AZS) 7, coupling capacitance 6, integrator 8, amplification filtering 10, detuner 11, current detecting 12, transformer 13, touch-screen 14 and multi-way switch 15, described serial paralled interface 2, touch-screen exciting signal source is all connected with central processing system 1 with automatic zero set (AZS) 7, the first end of described transformer 13 is connected with touch-screen 14 by multi-way switch 15, second end of described transformer 13 is connected with detuner 11 by electric current electrical measurement 12, 3rd end of described transformer 13 is connected with automatic zero set (AZS) 7 and touch-screen 14 with multi-way switch 15 respectively by coupling capacitance 6, the five terminal of described transformer 13 is connected with touch-screen exciting signal source, 4th end ground connection of described transformer 13, described detuner 11 is connected with touch-screen exciting signal source and amplification filtering 10 respectively, described amplification filtering 10 is connected with touch-screen exciting signal source by integrator 8,
Described touch-screen exciting signal source comprises frequency adjustment 3, signal generator 4, power amplification 5 and A/D conversion 9, described frequency adjustment 3 is connected with central processing system 1, described signal generator 4 is connected with detuner 11, described power amplification 5 is connected with the five terminal of transformer 13, described A/D conversion 9 adjusts 3 sum-product intergrators 8 respectively and is connected with frequency, described frequency adjustment 3 is connected with power amplification 5 by signal generator 4;
Described frequency adjustment 3 comprises the second paster integrated circuit U2, 3rd paster integrated circuit U3, 3rd resistance R3, 4th resistance R4, 5th resistance R5 and the second electric capacity C2, the reverse inter-input-ing ending grounding of described 3rd paster integrated circuit U3, the in-phase input end of described 3rd paster integrated circuit U3 is connected with the output terminal of the 3rd paster integrated circuit U3 by the second electric capacity C2, the output terminal of described 3rd paster integrated circuit U3 is connected with the in-phase input end of the second paster integrated circuit U2 by the 5th resistance R5, the in-phase input end of described second paster integrated circuit U2 is connected with the output terminal of the second paster integrated circuit U2 by the 4th resistance R4, the inverting input of described second paster integrated circuit U2 is connected with the 3rd resistance R3,
Described A/D conversion 9 comprises the 4th paster integrated circuit U4, and described 4th paster integrated circuit U4 is in parallel with the second electric capacity C2;
Described signal generator 4 comprises the first paster integrated circuit U1, first resistance R1, second resistance R2 and the first electric capacity C1, 7th end of described first paster integrated circuit U1 is connected with the output terminal of the second paster integrated circuit U2, 8th end of described first paster integrated circuit U1 is connected with the in-phase input end of the second paster integrated circuit U2 by the 3rd resistance R3, the first end of described first paster integrated circuit U1 is by the external DC voltage power supply of the first electric capacity C1-12V, the external DC voltage power supply 12V of 6th end of described first paster integrated circuit U1, the five terminal of described first paster integrated circuit U1 and the 7th end are respectively by the first resistance R1 and the external DC voltage power supply 12V of the second resistance R2,
Described power amplification 5 comprises the 3rd electric capacity C3, 6th resistance R6, 7th resistance R7, 8th resistance R8, 9th resistance R9, tenth resistance R10, 11 resistance R11, 12 resistance R12, 13 resistance R13, 14 resistance R14, 15 resistance R15, 16 resistance R16, 17 resistance R17, first triode Q1, second triode Q2 and the 5th paster integrated circuit U5, the in-phase input end of described 5th paster integrated circuit U5 is connected with second end of the first paster integrated circuit U1 by the 6th resistance R6, the inverting input of described 5th paster integrated circuit U5 is respectively by the 7th resistance R7 and the 8th resistance R8 external DC voltage power supply 12V and DC voltage power supply-12V, the inverting input of described 5th paster integrated circuit U5 is connected with the 3rd electric capacity C3 by the 9th resistance R9, the output terminal of described 5th paster integrated circuit U5 passes through the external DC voltage power supply of the series circuit-12V of the 11 resistance R11 and the 12 resistance R12, the output terminal of described 5th paster integrated circuit U5 passes through the external DC voltage power supply 12V of series circuit of the tenth resistance R10 and the 15 resistance R15, the emitter of described first triode Q1 is all connected with the 9th resistance R9 and the 3rd electric capacity C3 junction with the 13 resistance R13 respectively by the 14 resistance R14 with the emitter of the second triode Q2, the collector of described first triode Q1 is by the external DC voltage power supply 12V of the 16 resistance R16, the base stage of described first triode Q1 is connected with the junction of the tenth resistance R10 and the 15 resistance R15, the collector of described second triode Q2 is by the external DC voltage power supply of the 17 resistance R17-12V, the base stage of described second triode Q2 is connected with the junction of the 11 resistance R11 and the 12 resistance R12.
Particularly, in order to improve the reliability of circuit, the model of described first paster integrated circuit U1 is IC8038, the model of described second paster integrated circuit U2, the 3rd paster integrated circuit U3 and the 5th paster integrated circuit U5 is LMV324, and the model of described 4th paster integrated circuit U4 is AD7524.
The principle of work of the touch-screen exciting signal source of this handset touch panel circuit is: the pumping signal of touch-screen is sent by the first paster integrated circuit U1 in signal generator 4, sends signal for sinusoidal wave; While signal generator 4 sends pumping signal, change 9 by frequency adjustment 3 and A/D to control the oscillation frequency of the first paster integrated circuit U1, wherein A/D conversion 9 is changed, adjust 3 by frequency subsequently to trigger, the oscillation frequency of the first paster integrated circuit U1 is made to control at 200kHZ, avoid the interference of mobile telephone display sweep signal, improve self antijamming capability of handset touch panel; The pumping signal sent by signal generator 4 due to power less, so carry out power amplification by power amplification 5 pairs of signals.
The principle of work of this handset touch panel circuit is: central processing system 1 receives signal from serial paralled interface 2, and send touch-screen pumping signal by controlling touch-screen exciting signal source subsequently, pumping signal enters into touch-screen 14 by transformer 13 and multi-way switch 15; When touch-screen 14 receives signal, current detecting 12 detects signal, enters into integrator 8 subsequently by detuner 11 and amplification filtering 10, then is entered into central processing system 1 carried out analyzing and processing by A/D conversion 9; In handset touch panel work, automatic zero set (AZS) 7 exports, and is coupled in the secondary centre tap of transformer 13 by coupling capacitance 6, makes electric current be adjusted to zero, avoids in the absence of a touch, due to the error of components and parts, and the measuring error produced.
Compared with prior art, this handset touch panel circuit decreases in the absence of a touch by automatic zero set (AZS) 7 circuit, due to the measuring error that the error of components and parts causes, controlled the oscillation frequency of the first paster integrated circuit simultaneously by A/D conversion 9 and frequency adjustment 3, avoid the sweep signal interference of handset touch panel.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on instructions, must determine its technical scope according to right.
Claims (2)
1. a handset touch panel circuit, it is characterized in that, comprise central processing system (1), serial paralled interface (2), touch-screen exciting signal source, automatic zero set (AZS) (7), coupling capacitance (6), integrator (8), amplification filtering (10), detuner (11), current detecting (12), transformer (13), touch-screen (14) and multi-way switch (15), described serial paralled interface (2), touch-screen exciting signal source is all connected with central processing system (1) with automatic zero set (AZS) (7), the first end of described transformer (13) is connected with touch-screen (14) by multi-way switch (15), second end of described transformer (13) is connected with detuner (11) by electric current electrical measurement (12), 3rd end of described transformer (13) is connected with automatic zero set (AZS) (7) and touch-screen (14) with multi-way switch (15) respectively by coupling capacitance (6), the five terminal of described transformer (13) is connected with touch-screen exciting signal source, 4th end ground connection of described transformer (13), described detuner (11) is connected with touch-screen exciting signal source and amplification filtering (10) respectively, described amplification filtering (10) is connected with touch-screen exciting signal source by integrator (8),
Described touch-screen exciting signal source comprises frequency adjustment (3), signal generator (4), power amplification (5) and A/D conversion (9), described frequency adjustment (3) is connected with central processing system (1), described signal generator (4) is connected with detuner (11), described power amplification (5) is connected with the five terminal of transformer (13), described A/D conversion (9) adjusts (3) sum-product intergrator (8) respectively and is connected with frequency, described frequency adjustment (3) is connected with power amplification (5) by signal generator (4),
Described frequency adjustment (3) comprises the second paster integrated circuit (U2), 3rd paster integrated circuit (U3), 3rd resistance (R3), 4th resistance (R4), 5th resistance (R5) and the second electric capacity (C2), the reverse inter-input-ing ending grounding of described 3rd paster integrated circuit (U3), the in-phase input end of described 3rd paster integrated circuit (U3) is connected with the output terminal of the 3rd paster integrated circuit (U3) by the second electric capacity (C2), the output terminal of described 3rd paster integrated circuit (U3) is connected with the in-phase input end of the second paster integrated circuit (U2) by the 5th resistance (R5), the in-phase input end of described second paster integrated circuit (U2) is connected with the output terminal of the second paster integrated circuit (U2) by the 4th resistance (R4), the inverting input of described second paster integrated circuit (U2) is connected with the 3rd resistance (R3),
Described A/D conversion (9) comprises the 4th paster integrated circuit (U4), and described 4th paster integrated circuit (U4) is in parallel with the second electric capacity (C2);
Described signal generator (4) comprises the first paster integrated circuit (U1), first resistance (R1), second resistance (R2) and the first electric capacity (C1), 7th end of described first paster integrated circuit (U1) is connected with the output terminal of the second paster integrated circuit (U2), 8th end of described first paster integrated circuit (U1) is connected with the in-phase input end of the second paster integrated circuit (U2) by the 3rd resistance (R3), the first end of described first paster integrated circuit (U1) is by the external DC voltage power supply-12V of the first electric capacity (C1), the external DC voltage power supply 12V of 6th end of described first paster integrated circuit (U1), the five terminal of described first paster integrated circuit (U1) and the 7th end are respectively by the first resistance (R1) and the external DC voltage power supply 12V of the second resistance (R2),
Described power amplification (5) comprises the 3rd electric capacity (C3), 6th resistance (R6), 7th resistance (R7), 8th resistance (R8), 9th resistance (R9), tenth resistance (R10), 11 resistance (R11), 12 resistance (R12), 13 resistance (R13), 14 resistance (R14), 15 resistance (R15), 16 resistance (R16), 17 resistance (R17), first triode (Q1), second triode (Q2) and the 5th paster integrated circuit (U5), the in-phase input end of described 5th paster integrated circuit (U5) is connected with the second end of the first paster integrated circuit (U1) by the 6th resistance (R6), the inverting input of described 5th paster integrated circuit (U5) is respectively by the 7th resistance (R7) and the 8th resistance (R8) external DC voltage power supply 12V and DC voltage power supply-12V, the inverting input of described 5th paster integrated circuit (U5) is connected with the 3rd electric capacity (C3) by the 9th resistance (R9), the output terminal of described 5th paster integrated circuit (U5) passes through the external DC voltage power supply of the series circuit-12V of the 11 resistance (R11) and the 12 resistance (R12), the output terminal of described 5th paster integrated circuit (U5) passes through the external DC voltage power supply 12V of series circuit of the tenth resistance (R10) and the 15 resistance (R15), the emitter of described first triode (Q1) is all connected with the 9th resistance (R9) and the 3rd electric capacity (C3) junction with the 13 resistance (R13) respectively by the 14 resistance (R14) with the emitter of the second triode (Q2), the collector of described first triode (Q1) is by the external DC voltage power supply 12V of the 16 resistance (R16), the base stage of described first triode (Q1) is connected with the junction of the tenth resistance (R10) and the 15 resistance (R15), the collector of described second triode (Q2) is by the external DC voltage power supply-12V of the 17 resistance (R17), the base stage of described second triode (Q2) is connected with the junction of the 11 resistance (R11) and the 12 resistance (R12).
2. handset touch panel circuit as claimed in claim 1, it is characterized in that, the model of described first paster integrated circuit (U1) is IC8038, the model of described second paster integrated circuit (U2), the 3rd paster integrated circuit (U3) and the 5th paster integrated circuit (U5) is LMV324, and the model of described 4th paster integrated circuit (U4) is AD7524.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235598.2U CN204613904U (en) | 2015-04-17 | 2015-04-17 | A kind of handset touch panel circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235598.2U CN204613904U (en) | 2015-04-17 | 2015-04-17 | A kind of handset touch panel circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204613904U true CN204613904U (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520235598.2U Expired - Fee Related CN204613904U (en) | 2015-04-17 | 2015-04-17 | A kind of handset touch panel circuit |
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| Country | Link |
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| CN (1) | CN204613904U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106919291A (en) * | 2017-03-23 | 2017-07-04 | 安徽玖信光电科技有限公司 | A kind of controller for capacitive touch screen |
-
2015
- 2015-04-17 CN CN201520235598.2U patent/CN204613904U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106919291A (en) * | 2017-03-23 | 2017-07-04 | 安徽玖信光电科技有限公司 | A kind of controller for capacitive touch screen |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20180417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |