CN107272948A - Electric capacity touch screen system and corresponding pressure detection method based on piezoelectric - Google Patents
Electric capacity touch screen system and corresponding pressure detection method based on piezoelectric Download PDFInfo
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- CN107272948A CN107272948A CN201710438469.7A CN201710438469A CN107272948A CN 107272948 A CN107272948 A CN 107272948A CN 201710438469 A CN201710438469 A CN 201710438469A CN 107272948 A CN107272948 A CN 107272948A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
-
- 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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
- Position Input By Displaying (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of electric capacity touch screen system based on piezoelectric, it includes front end touch Panel and back-end circuit, and front end touch Panel includes the capacitance detecting part and pressure detecting part that three layers or four layer signal acquisition layers are constituted；Back-end circuit includes reading circuit and signal processing circuit.The invention also discloses the pressure detection method realized using above-mentioned electric capacity touch screen system.The present invention does not increase system complexity while pressure detecting susceptibility is improved, and the method used is succinct, it is easy to accomplish.The present invention electric capacity touch screen system suitable for improving pressure detecting susceptibility.
Description
Technical field
The invention belongs to technical field of electronic equipment, the pressure detecting susceptibility for improving electric capacity touch screen system, specifically
It is a kind of electric capacity touch screen system and corresponding pressure detection method based on piezoelectric that ground, which is said,.
Background technology
Pressure detecting has become a new function of touch screen electronic product, existing touch screen pressure detecting, based on inspection
The capacitance variations that measuring pressure is produced, this can not provide enough pressure detecting susceptibilitys, can also increase the thickness of touch-screen, answer
Miscellaneous degree, while increasing product energy consumption.
Whether the increase of the shortcoming of pressure detecting susceptibility or touch screen structure complexity, the increase of energy consumption, this
The Consumer's Experience of touch screen electronic product will be caused to decline, reduce the market competitiveness.
Therefore, it is badly in need of a kind of new technology at present, can increase while the pressure detecting function of high sensitive is ensured
The complexity of system.
The content of the invention
In order to solve above-mentioned technical problem present in prior art, the present invention is intended to provide a kind of based on piezoelectric
Electric capacity touch screen system；
Another object of the present invention is to provide the pressure inspection realized using the electric capacity touch screen system based on piezoelectric
Survey method.
To achieve the above object, the technical scheme used is as follows by the present invention：
A kind of electric capacity touch screen system based on piezoelectric, it includes front end touch Panel and back-end circuit；
1. front end touch Panel
The front end touch Panel includes three layer signal acquisition layers or four layer signal acquisition layers；Wherein,
1）Three layer signal acquisition layers
The three layer signals acquisition layer includes the exciting electrode layer, piezoelectric material layer and ground electrode layer set gradually from top to bottom,
Piezoelectric material layer composition capacitance detecting portion as dielectric layer, together with exciting electrode layer and ground electrode layer as battery lead plate
Point, piezoelectric material layer decomposition pressure detection part as pressure detecting layer, together with exciting electrode layer and ground electrode layer；
2）Four layer signal acquisition layers
The four layer signals acquisition layer includes piezoelectric material layer, exciting electrode layer, insulating barrier and the ground set gradually from top to bottom
Electrode layer, exciting electrode layer, insulating barrier and ground electrode layer constitute capacitance detecting part together, the piezoelectric material layer and swash
Encourage electrode layer and constitute pressure detecting part together；
2. back-end circuit
The back-end circuit be one of the first back-end circuit or the second back-end circuit, wherein：
A. the first back-end circuit
First back-end circuit includes the first reading circuit and the first signal processing circuit；
First reading circuit includes charge amplifier/voltage amplifier, filter unit, the analog-to-digital conversion list being sequentially connected in series
Member, data selector, wherein filter unit include low-pass filter unit and bandpass filtering unit in parallel, AD conversion unit bag
Include the first AD conversion unit and the second AD conversion unit of parallel connection；
Signal of the signal output part of the capacitance detecting part and pressure detecting part with charge amplifier/voltage amplifier
Input is connected, the signal input part of low-pass filter unit and bandpass filtering unit with charge amplifier/voltage amplifier
Signal output part is connected, the signal output part of low-pass filter unit and bandpass filtering unit respectively with the first AD conversion unit,
The input end of analog signal of second AD conversion unit is connected, the numeral of the first AD conversion unit and the second AD conversion unit
Signal output part is connected with the signal input part of data selector, the signal output part of data selector and the first signal transacting
The signal input part of circuit is connected；
B. the second back-end circuit
Second back-end circuit includes the second reading circuit and secondary signal process circuit；
Second reading circuit includes the charge amplifier/voltage amplifier and AD conversion unit of series connection；
Signal of the signal output part of the capacitance detecting part and pressure detecting part with charge amplifier/voltage amplifier
Input is connected, the signal output part of charge amplifier/voltage amplifier and the input end of analog signal phase of AD conversion unit
Even, the digital signal output end of AD conversion unit is connected with the signal input part of secondary signal process circuit.
Present invention also offers the pressure detection method realized using above-mentioned electric capacity touch screen system based on piezoelectric, when
This method is method one when back-end circuit uses the first back-end circuit, when back-end circuit uses the second back-end circuit this method for
Method two, wherein,
I. method one
Method one includes the following steps carried out successively：
The first step, when touch action occurs, is produced on charge amplifier/voltage amplifier collection exciting electrode layer, piezoelectric material layer
Hybrid analog-digital simulation voltage signal is zoomed into after raw mixing electric signal and exports result to low-pass filter unit and bandpass filtering list
Member；
Second step, low-pass filter unit obtains simulated pressure signal and will after the hybrid analog-digital simulation voltage signal received is handled
As a result export to the first AD conversion unit, bandpass filter obtains mould after the hybrid analog-digital simulation voltage signal received is handled
Intend capacitance signal and export result to the second AD conversion unit；
The simulated pressure signal received is converted into data signal and exports result to number by the 3rd step, the first AD conversion unit
According to selector, at the same the second AD conversion unit by the artificial capacitor signal received change into data signal and by result export to
Data selector；
4th step, data selector exports the data signal received selection to the first signal processing circuit；
5th step, the first signal processing circuit determines whether the electric signal received to export after processing to control unit, control
Unit is according to the corresponding control signal of the electric signal output received；
II. method two
Method two includes the following steps carried out successively：
The first step, when touch action occurs, is produced on charge amplifier/voltage amplifier collection exciting electrode layer, piezoelectric material layer
Hybrid analog-digital simulation voltage signal is zoomed into after raw mixing electric signal and exports result to AD conversion unit；
The hybrid analog-digital simulation voltage signal received is converted into hybrid digital signal and exports result by second step, AD conversion unit
To secondary signal process circuit；
3rd step, secondary signal process circuit on the one hand the LPF algorithm that is stored using itself by the hybrid digital received
The bandpass filtering algorithm for pressure signal is obtained after signal transacting, on the other hand being stored using itself is believed the hybrid digital received
Number processing after obtain capacitance signal；
4th step, control unit exports corresponding control signal after being further processed according to the result of the 3rd step.
The present invention as a result of above-mentioned technical scheme, its compared with prior art, acquired technological progress is：
（1）The invention provides the electric capacity touch screen system based on piezoelectric, on the one hand the characteristic by the use of piezoelectric is used as electricity
Hold the dielectric layer of detection part, on the other hand constitute pressure detecting part together with exciting electrode layer, do not increasing system complex
The increase of energy consumption is reduced while property；
（2）The present invention is separated capacitance signal and pressure signal using filter unit, while pressure detecting susceptibility is improved
Do not increase system complexity；
（3）The method applied in the present invention is succinct, it is easy to accomplish.
The present invention electric capacity touch screen system suitable for improving pressure detecting susceptibility.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, the reality with the present invention
Applying example is used to explain the present invention together, is not construed as limiting the invention.
In the accompanying drawings：
Fig. 1 is the front end touch Panel partial structural diagram of the embodiment of the present invention 1 and 2；
Fig. 2 is another partial structural diagram of the front end touch Panel of the embodiment of the present invention 1 and 2；
Fig. 3 is the electrical schematic diagram of the embodiment of the present invention 1；
Fig. 4 is the electrical schematic diagram of the embodiment of the present invention 2.
In figure：1st, exciting electrode layer, 2, piezoelectric material layer, 3, ground electrode layer, 4, insulating barrier.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing.It should be appreciated that preferred reality described herein
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
A kind of electric capacity touch screen system based on piezoelectric of embodiment 1
A kind of electric capacity touch screen system based on piezoelectric, it includes front end touch Panel and the first back-end circuit.
Reference picture 1, front end touch Panel includes three layer signal acquisition layers, and three layer signal acquisition layers are included from top to bottom successively
Exciting electrode layer 1, piezoelectric material layer 2 and the ground electrode layer 3 of setting；Wherein, the one side of piezoelectric material layer 2 as dielectric layer, with
Capacitance detecting part is constituted together as the exciting electrode layer 1 and ground electrode layer 3 of battery lead plate, and another aspect piezoelectric material layer 2 is made
The decomposition pressure detection part for pressure detecting layer, together with exciting electrode layer 1 and ground electrode layer 3.
Reference picture 3, the first back-end circuit includes the first reading circuit and the first signal processing circuit；Wherein, first read
Circuit includes charge amplifier/voltage amplifier, filter unit, AD conversion unit, the data selector being sequentially connected in series, filtering
Unit includes low-pass filter unit and bandpass filtering unit in parallel, and AD conversion unit includes the first analog-to-digital conversion list in parallel
Member and the second AD conversion unit；
The signal output part of capacitance detecting part and pressure detecting part is inputted with the signal of charge amplifier/voltage amplifier
End is connected, the signal of the signal input part of low-pass filter unit and bandpass filtering unit with charge amplifier/voltage amplifier
Output end is connected, the signal output part of low-pass filter unit and bandpass filtering unit respectively with the first AD conversion unit, second
The input end of analog signal of AD conversion unit is connected, the data signal of the first AD conversion unit and the second AD conversion unit
Output end is connected with the signal input part of data selector, the signal output part of data selector and the first signal processing circuit
Signal input part be connected.
The present embodiment can also using it is another include four layer signals gather Rotating fields front end touch Panel, reference picture 2,
Four layer signal acquisition layers include piezoelectric material layer 2, exciting electrode layer 1, insulating barrier 4 and the ground electrode layer set gradually from top to bottom
3；Wherein, exciting electrode layer 1, insulating barrier 4 and ground electrode layer 3 constitute capacitance detecting part together；Piezoelectric material layer 2 and excitation electricity
Pole layer 1 constitutes pressure electrical measurement part together.
Wherein, low-pass filter unit includes low pass filter, and bandpass filtering unit includes bandpass filter, in the present embodiment
In, the cut-off frequency of low pass filter is 10kHz in low-pass filter unit, and the bandwidth of bandpass filter is according to electric capacity pumping signal
To design, such as when electric capacity pumping signal is 100khz sinusoidal signal, in 100khz, cut-off frequency centered on bandpass filter
In the fertile hereby bandpass filter of 90khz and 110khz Bart.
In the present embodiment, the first signal processing circuit uses structure same as the prior art.
A kind of electric capacity touch screen system based on piezoelectric of embodiment 2
A kind of electric capacity touch screen system based on piezoelectric, it includes front end touch Panel and the second back-end circuit.
Reference picture 1, front end touch Panel includes three layer signal acquisition layers, and three layer signal acquisition layers are included from top to bottom successively
Exciting electrode layer 1, piezoelectric material layer 2 and the ground electrode layer 3 of setting；Wherein, the one side of piezoelectric material layer 2 as dielectric layer, with
Capacitance detecting part is constituted together as the exciting electrode layer 1 and ground electrode layer 3 of battery lead plate, and another aspect piezoelectric material layer 2 is made
The decomposition pressure detection part for pressure detecting layer, together with exciting electrode layer 1 and ground electrode layer 3.
Reference picture 4, the second back-end circuit includes the second reading circuit and secondary signal process circuit；Wherein, second read
Circuit includes the charge amplifier/voltage amplifier and AD conversion unit of series connection；Capacitance detecting part and pressure detecting part
Signal input part of the signal output part with charge amplifier/voltage amplifier be connected, charge amplifier/voltage amplifier
Signal output part is connected with the input end of analog signal of AD conversion unit, the digital signal output end of AD conversion unit and
The signal input part of binary signal process circuit is connected；
Secondary signal process circuit includes the control unit of be stored with LPF algorithm and bandpass filtering algorithm；Control unit exists
Identical with prior art on hardware configuration, a part for control unit is constituted together with LPF algorithm, bandpass filtering algorithm
Low-pass filter unit, bandpass filtering unit.
The present embodiment can also using it is another include four layer signals gather Rotating fields front end touch Panel, reference picture 2,
Four layer signal acquisition layers include piezoelectric material layer 2, exciting electrode layer 1, insulating barrier 4 and the ground electrode layer set gradually from top to bottom
3；Wherein, exciting electrode layer 1, insulating barrier 4 and ground electrode layer 3 constitute capacitance detecting part together；Piezoelectric material layer 2 and excitation electricity
Pole layer 1 constitutes pressure electrical measurement part together.
A kind of pressure detection method realized in the electric capacity touch screen system based on piezoelectric of embodiment 3
The present embodiment is a kind of pressure detection method realized using embodiment 1, and it includes the following steps carried out successively：
The first step, when touch action occurs, on charge amplifier/voltage amplifier collection exciting electrode layer 1, piezoelectric material layer 2
Hybrid analog-digital simulation voltage signal is zoomed into after the mixing electric signal of generation and exports result to low-pass filter unit and bandpass filtering
Unit；
Second step, low-pass filter unit obtains simulated pressure signal and will after the hybrid analog-digital simulation voltage signal received is handled
As a result export to the first AD conversion unit, bandpass filter obtains mould after the hybrid analog-digital simulation voltage signal received is handled
Intend capacitance signal and export result to the second AD conversion unit；
The simulated pressure signal received is converted into data signal and exports result to number by the 3rd step, the first AD conversion unit
According to selector, at the same the second AD conversion unit by the artificial capacitor signal received change into data signal and by result export to
Data selector；
4th step, data selector exports the data signal received selection to the first signal processing circuit；
The electric signal received is determined whether processing by the 5th step, the first signal processing circuit, is then included using itself
Control unit exports corresponding control signal according to further result, and corresponding unit is made after receiving control signal
Response；
In this step, control unit uses existing hardware configuration, signal processing circuit and the control unit included by it
The processing method of electric signal to receiving is identical with prior art.
A kind of pressure detection method realized in the electric capacity touch screen system based on piezoelectric of embodiment 4
The present embodiment realizes that it includes the following steps carried out successively using embodiment 2：
The first step, when touch action occurs, is produced on charge amplifier/voltage amplifier collection exciting electrode layer, piezoelectric material layer
Hybrid analog-digital simulation voltage signal is zoomed into after raw mixing electric signal and exports result to AD conversion unit；
The hybrid analog-digital simulation voltage signal received is converted into hybrid digital signal and exports result by second step, AD conversion unit
To secondary signal process circuit；
3rd step, secondary signal process circuit on the one hand the LPF algorithm that is stored using itself by the hybrid digital received
The bandpass filtering algorithm for pressure signal is obtained after signal transacting, on the other hand being stored using itself is believed the hybrid digital received
Number processing after obtain capacitance signal；
4th step, control unit exports corresponding control signal after being further processed according to the result of the 3rd step；
In this step, the processing method of control unit is identical with prior art.
Control unit belongs to a part for secondary signal process circuit, and control unit uses hardware same as the prior art
Structure.
In the present embodiment, cut-off frequency is 10kHz in LPF algorithm, and the bandwidth of bandpass filtering is encouraged according to electric capacity
Signal is designed, such as when electric capacity pumping signal is 100khz sinusoidal signal, setting frequency range center exists in bandpass filtering algorithm
100khz, cut-off frequency are in 90khz and 110khz.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in power of the present invention
Within the scope of profit is claimed.
Claims (2)
1. a kind of electric capacity touch screen system based on piezoelectric, it includes front end touch Panel and back-end circuit, it is characterised in that：
1. front end touch Panel
The front end touch Panel includes three layer signal acquisition layers or four layer signal acquisition layers；Wherein,
1）Three layer signal acquisition layers
The three layer signals acquisition layer includes the exciting electrode layer set gradually from top to bottom（1）, piezoelectric material layer（2）With ground electricity
Pole layer（3）, the piezoelectric material layer（2）As dielectric layer, be used as battery lead plate exciting electrode layer（1）With ground electrode layer（3）
Capacitance detecting part, piezoelectric material layer are constituted together（2）It is used as pressure detecting layer and exciting electrode layer（1）With ground electrode layer（3）
Decomposition pressure detection part together；
2）Four layer signal acquisition layers
The four layer signals acquisition layer includes the piezoelectric material layer set gradually from top to bottom（2）, exciting electrode layer（1）, insulation
Layer（4）With ground electrode layer（3）, the exciting electrode layer（1）, insulating barrier（4）With ground electrode layer（3）Capacitance detecting portion is constituted together
Point, the piezoelectric material layer（2）With exciting electrode layer（1）Pressure detecting part is constituted together；
2. back-end circuit
The back-end circuit be one of the first back-end circuit or the second back-end circuit, wherein：
First back-end circuit
First back-end circuit includes the first reading circuit and the first signal processing circuit；
First reading circuit includes charge amplifier/voltage amplifier, filter unit, the analog-to-digital conversion list being sequentially connected in series
Member, data selector, wherein filter unit include low-pass filter unit and bandpass filtering unit in parallel, AD conversion unit bag
Include the first AD conversion unit and the second AD conversion unit of parallel connection；
Signal of the signal output part of the capacitance detecting part and pressure detecting part with charge amplifier/voltage amplifier
Input is connected, the signal input part of low-pass filter unit and bandpass filtering unit with charge amplifier/voltage amplifier
Signal output part is connected, the signal output part of low-pass filter unit and bandpass filtering unit respectively with the first AD conversion unit,
The input end of analog signal of second AD conversion unit is connected, the numeral of the first AD conversion unit and the second AD conversion unit
Signal output part is connected with the signal input part of data selector, the signal output part of data selector and the first signal transacting
The signal input part of circuit is connected；
Second back-end circuit
Second back-end circuit includes the second reading circuit and secondary signal process circuit；
Second reading circuit includes the charge amplifier/voltage amplifier and AD conversion unit of series connection；
Signal of the signal output part of the capacitance detecting part and pressure detecting part with charge amplifier/voltage amplifier
Input is connected, the signal output part of charge amplifier/voltage amplifier and the input end of analog signal phase of AD conversion unit
Even, the digital signal output end of AD conversion unit is connected with the signal input part of secondary signal process circuit.
2. a kind of pressure detection method, it is characterised in that：It utilizes the electric capacity touch screen based on piezoelectric described in claim 1
System realizes that this method is method one when back-end circuit uses the first back-end circuit, when back-end circuit uses the second rear end
This method is method two during circuit, wherein,
I. method one
Method one includes the following steps carried out successively：
The first step, when touch action occurs, charge amplifier/voltage amplifier collects exciting electrode layer（1）, piezoelectric material layer
（2）Hybrid analog-digital simulation voltage signal is zoomed into after the mixing electric signal of upper generation and exports result to low-pass filter unit and band logical
Filter unit；
Second step, low-pass filter unit obtains simulated pressure signal and will after the hybrid analog-digital simulation voltage signal received is handled
As a result export to the first AD conversion unit, bandpass filter obtains mould after the hybrid analog-digital simulation voltage signal received is handled
Intend capacitance signal and export result to the second AD conversion unit；
The simulated pressure signal received is converted into data signal and exports result to number by the 3rd step, the first AD conversion unit
According to selector, at the same the second AD conversion unit by the artificial capacitor signal received change into data signal and by result export to
Data selector；
4th step, data selector exports the data signal received selection to the first signal processing circuit；
5th step, the first signal processing circuit determines whether the electric signal received to export after processing to control unit, control
Unit is according to the corresponding control signal of the electric signal output received；
II. method two
Method two includes the following steps carried out successively：
The first step, when touch action occurs, charge amplifier/voltage amplifier collects exciting electrode layer（1）, piezoelectric material layer
（2）Hybrid analog-digital simulation voltage signal is zoomed into after the mixing electric signal of upper generation and exports result to AD conversion unit；
The hybrid analog-digital simulation voltage signal received is converted into hybrid digital signal and exports result by second step, AD conversion unit
To secondary signal process circuit；
3rd step, secondary signal process circuit on the one hand the LPF algorithm that is stored using itself by the hybrid digital received
The bandpass filtering algorithm for pressure signal is obtained after signal transacting, on the other hand being stored using itself is believed the hybrid digital received
Number processing after obtain capacitance signal；
4th step, control unit exports corresponding control signal after being further processed according to the result of the 3rd step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710438469.7A CN107272948A (en) | 2017-06-12 | 2017-06-12 | Electric capacity touch screen system and corresponding pressure detection method based on piezoelectric |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710438469.7A CN107272948A (en) | 2017-06-12 | 2017-06-12 | Electric capacity touch screen system and corresponding pressure detection method based on piezoelectric |
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| CN201710438469.7A Pending CN107272948A (en) | 2017-06-12 | 2017-06-12 | Electric capacity touch screen system and corresponding pressure detection method based on piezoelectric |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110308831A (en) * | 2019-06-04 | 2019-10-08 | 惠州市力天科技有限公司 | A kind of signal processing method of anti-interference capacitor screen and capacitance plate |
| CN111158528A (en) * | 2019-12-31 | 2020-05-15 | 北京航空航天大学 | Device and method for improving force measurement accuracy of piezoelectric touch screen under step force |
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| CN1826576A (en) * | 2003-07-21 | 2006-08-30 | 皇家飞利浦电子股份有限公司 | Touch sensitive display for a portable device |
| CN101782826A (en) * | 2009-01-19 | 2010-07-21 | 义隆电子股份有限公司 | Capacitance type touch pad and module thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110308831A (en) * | 2019-06-04 | 2019-10-08 | 惠州市力天科技有限公司 | A kind of signal processing method of anti-interference capacitor screen and capacitance plate |
| CN111158528A (en) * | 2019-12-31 | 2020-05-15 | 北京航空航天大学 | Device and method for improving force measurement accuracy of piezoelectric touch screen under step force |
| CN111158528B (en) * | 2019-12-31 | 2021-06-29 | 北京航空航天大学 | Device and method for improving force measurement accuracy of piezoelectric touch screen under step force |
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Application publication date: 20171020 |