CN102890575A - Touch sensing positioning device and system - Google Patents
Touch sensing positioning device and system Download PDFInfo
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- CN102890575A CN102890575A CN2011102064057A CN201110206405A CN102890575A CN 102890575 A CN102890575 A CN 102890575A CN 2011102064057 A CN2011102064057 A CN 2011102064057A CN 201110206405 A CN201110206405 A CN 201110206405A CN 102890575 A CN102890575 A CN 102890575A
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Abstract
The invention relates to a touch sensing positioning device and system, wherein the touch sensing positioning device comprises a pulse signal transceiver module and a processing module; the pulse signal transceiver module is used for applying a pulse excitation signal to the input end of a contact sensing module and receiving a row delay signal and a column delay signal produced through the contact sensing module at the output end of the contact sensing module on the basis of a fact that whether the contact sensing module is touched; and the processing module is used for confirming the position of a contact according to the row delay signal and the column delay signal produced on the basis of the fact that whether the contact sensing module is touched. A digital delta TDC (Time Density Curve) is adopted by the touch sensing positioning device and system, and compared with an ADC (Analog to Digital Converter) applied to the traditional touch detection, the touch sensing positioning device and system have the advantages of wide application range and low power consumption; and furthermore, due to adoption of the digital delta TDC, the touch sensing positioning device also has the advantages of high precision, strong interference resistance and small size.
Description
Technical field
The present invention relates to touch location technology, relate in particular to a kind of touch sensible locating device and system.
Background technology
During present touch sensible is used, the technical scheme that the touch sensible locating device of touch-screen (also can be called the multiconductor pick-up unit) adopts has the CSD (CapSense Delta-Sigma) of Cypress company, CSA (CapSense Approximating), CSR (CapSense Relaxation Oscillator), the Qtouch of Atmel company (CapSense Relaxation Oscillator) technology etc., these technology have maturation, reliable advantage, but, these technology specific aims are single, all be only applicable to double-deck self-capacitance screen, and in these technology owing to adopt ADC (Analog-to-Digital Converter, analog/digital converter), cause power consumption generally higher.Therefore, the touch sensible locating device that has the optimization of the more extensive scope of application, low-power consumption is important developing direction of current touch field of locating technology.
Summary of the invention
Technical matters to be solved by this invention provides a kind of touch sensible locating device and system, and is applied widely, low in energy consumption.
For solving the problems of the technologies described above, the present invention proposes a kind of touch sensible locating device, comprising:
Whether the pulse signal transceiver module is used for applying pulse excitation signal at the input end of contact induction module, and is touched according to described contact induction module, receives capable inhibit signal and the row inhibit signal of its generation at output terminal;
Processing module, the position that the described row inhibit signal that produces for whether being touched according to described contact induction module and described row inhibit signal are determined the contact.
Further, said apparatus also can have following characteristics, and described processing module comprises:
The first computing unit, the time difference of the row inhibit signal of generation when the row inhibit signal of the time difference of the capable inhibit signal that the capable inhibit signal that produces when being used for calculating described contact induction module and being touched produces when not being touched with described contact induction module and generation when calculating described contact induction module and being touched and described contact induction module are not touched;
The second computing unit is used for determining according to the time difference of the time difference of described row inhibit signal and described row inhibit signal the position coordinates of contact.
Further, said apparatus also can have following characteristics, and described the first computing unit comprises:
The time difference digital quantizer is used for the time difference of computing relay signal, and is converted to digital signal;
Register is used for storing the time difference of digital signal form.
Further, said apparatus also can have following characteristics, described time difference digital quantizer comprises time delay chain, thick counter, dynamic storage and subtracter, and described time delay chain links to each other with thick counter, and described dynamic storage links to each other with subtracter with described time delay chain, thick counter respectively.
Further, said apparatus also can have following characteristics, and described the second computing unit comprises processor, direct memory access controller DMAC, FLASH control module, the internal integrated circuit I that links to each other by bus
2C interface unit, and the FLASH that links to each other with described FLASH control module.
Further, said apparatus also can have following characteristics, and described pulse signal transceiver module comprises such as in the lower unit any one:
The first scanning element, be used for the port on four angles of described contact induction module exit as input end, with all exits of described contact induction module as output terminal, apply simultaneously pulse excitation signal at all input ends, receive capable inhibit signal and the row inhibit signal whether described contact induction module is touched and produces at all output terminals;
The second scanning element, be used for all row exits with all row exits of described contact induction module first surface and second as input end, with all row exits of all row exits of the 3rd of described contact induction module and fourth face as output terminal, sequentially apply line by line pulse excitation signal at input end, receive capable inhibit signal and the row inhibit signal whether described contact induction module is touched and produces at all output terminals, described first surface, second, the 3rd, fourth face are sequentially continuous;
The 3rd scanning element, be used for all row exits with all row exits of described contact induction module first surface and second as input end, with all row exits of all row exits of the 3rd of described contact induction module and fourth face as output terminal, sequentially apply pulse excitation signal in the input end interlacing every row, receive capable inhibit signal and the row inhibit signal whether described contact induction module is touched and produces at all output terminals, described first surface, second, the 3rd, fourth face are sequentially continuous;
The 4th scanning element, be used for both having made input end with all exits of contact induction module and also make output terminal, sequentially apply line by line pulse excitation signal at input end, receive capable inhibit signal and the row inhibit signal whether described contact induction module is touched and produces at all output terminals.
Further, said apparatus also can have following characteristics, and described pulse excitation signal is square-wave pulse pumping signal, triangular pulse pumping signal, sinusoidal wave pulse pumping signal or sawtooth pulse pumping signal.
For solving the problems of the technologies described above, the invention allows for a kind of touch sensible positioning system, comprise above-mentioned each described touch sensible locating device, also comprise the contact induction module, whether described contact induction module is used for receiving the pulse excitation signal that described touch sensible locating device provides, and be touched according to it and export capable inhibit signal and row inhibit signal.
Further, said system also can have following characteristics, and described contact induction module is mutual capacitance screen, double-deck self-capacitance screen, individual layer ITO touch-screen, touch panel or electronics skin.
Touch sensible locating device of the present invention and system adopt digital Δ TDC, touching the ADC that uses in the detection with tradition compares, has advantage applied widely, low in energy consumption, and, by adopting digital Δ TDC, touch sensible locating device of the present invention also has precision height, strong interference immunity, advantage that area is little.
Description of drawings
Fig. 1 is the structural drawing of touch sensible locating device in the embodiment of the invention;
Fig. 2 A is a kind of structural drawing of pulse signal transceiver module 11 among Fig. 1;
Fig. 2 B is a kind of structural drawing of processing module 12 among Fig. 1;
Fig. 3 is the concrete structure figure of touch sensible locating device in the application example of the present invention;
Fig. 4 is a kind of concrete structure figure of the first computing unit 32 among Fig. 3;
Fig. 5 is a kind of concrete structure figure of the second computing unit 33 among Fig. 3;
Fig. 6 A is triangular net cellular construction synoptic diagram;
Fig. 6 B is the contact induction module structural representation that is comprised of the triangular net unit shown in Fig. 6 A;
Fig. 6 C is quadrilateral network cellular construction synoptic diagram;
Fig. 6 D is the contact induction module structural representation that is comprised of the quadrilateral network unit shown in Fig. 6 C;
Fig. 6 E is hexagonal network cellular construction synoptic diagram;
Fig. 6 F is the contact induction module structural representation that is comprised of the hexagonal network unit shown in Fig. 6 E;
Fig. 7 A is the oscillogram of square-wave pulse pumping signal;
Fig. 7 B is the oscillogram of sinusoidal wave pulse pumping signal;
Fig. 7 C is the oscillogram of triangular pulse pumping signal;
Fig. 7 D is the oscillogram of sawtooth pulse pumping signal;
Fig. 8 A is that the input end of four jiaos of excitation scanning methods arranges synoptic diagram;
Fig. 8 B is that the output terminal of four jiaos of excitation scanning methods arranges synoptic diagram;
Fig. 8 C is that the input end of scanning method arranges synoptic diagram line by line;
Fig. 8 D is that the output terminal of scanning method arranges synoptic diagram line by line;
Fig. 8 E is that the input end of full scan method arranges synoptic diagram;
Fig. 8 F is that the output terminal of full scan method arranges synoptic diagram;
Fig. 9 A is when having or not finger touch, and output terminal is with respect to the oscillogram of input end rising edge Time delay variation;
Fig. 9 B is when having or not finger touch, and output terminal is with respect to the oscillogram of input end negative edge Time delay variation;
Figure 10 is the structure of mutual capacitance screen and the equivalent circuit diagram of unit square thereof.
Embodiment
The principle of touch sensible locating device of the present invention institute foundation is: use touching, capacitance C is comprised of two parts: the inductance capacitance Cf that fixed capacity Cx contacts with staff or brings during near the contact induction module, touch each output terminal of front and back owing to the Time delay variation Δ T that Cf produces by detecting, can judge the position of finger touch.There are two kinds of inducing methods to realize, shown in Fig. 9 A and Fig. 9 B: the one, observe output terminal with respect to the Time delay variation of the rising edge of input end, the 2nd, the observation output terminal is with respect to the Time delay variation of the negative edge of input end.Fig. 9 A and Fig. 9 B are respectively when having or not finger touch, and output terminal is with respect to the oscillogram of input end rising edge Time delay variation and the output terminal oscillogram with respect to input end negative edge Time delay variation.
When without finger touch, producing the output time-delay by fixed capacity Cx is Tc;
When finger touch is arranged, total electric capacity C=Cx+Cf, time-delay becomes greatly Tcf;
Time delay variation Δ T=Tcf-Tc, the variation of Δ T is directly reacted Cf to the impact of contact induction module, therefore by judging the variation of Δ T, can judge to have or not finger touch, and carry out aftertreatment by certain algorithm, thereby realize the location, contact.
Touch sensible locating device of the present invention is applicable to the contact induction module that equivalent electrical circuit is RC network, and for example, this contact induction module can shield for mutual capacitance, double-deck self-capacitance screen or individual layer be without wire jumper ITO touch-screen etc.Figure 10 is the structure of mutual capacitance screen and the equivalent circuit diagram of unit square thereof.As shown in figure 10, the left side of Figure 10 is the structure of mutual capacitance screen, and the right side is the equivalent electrical circuit of the unit square of mutual capacitance screen, and the mutual capacitance screen is mainly formed by these unit square interconnection.
Below in conjunction with accompanying drawing principle of the present invention and feature are described, institute gives an actual example and only is used for explaining the present invention, is not be used to limiting scope of the present invention.
Fig. 1 is the structural drawing of touch sensible locating device in the embodiment of the invention.As shown in Figure 1, in the present embodiment, touch sensible locating device 10 comprises pulse signal transceiver module 11 and processing module 12, pulse signal transceiver module 11 is connected with processing module 12, wherein, pulse signal transceiver module 11 is used for applying pulse excitation signal at the input end of contact induction module, and receives when being touched and capable inhibit signal and the row inhibit signal of when not being touched generation at the output terminal of contact induction module; Processing module 12 be used for according to pulse signal transceiver module 11 receive be touched the time and the capable inhibit signal of when not being touched generation and the position that the row inhibit signal is determined the contact.The contact induction module can be RC (Resistor and Capacitor, resistance and electric capacity) network.
Wherein, RC network refers to the equivalent electrical circuit of certain contact induction module (for example touch-screen), that is to say, some contact induction modules can equivalence be concrete RC network, the contact induction module not only comprises touch-screen (touch-screens such as mutual capacitance screen, double-deck self-capacitance screen, individual layer ITO touch-screen), also comprises other the touch structure such as touch panel, electronics skin.RC network is the network that utilizes resistance, electric capacity to build, and the characteristics of this network are: form by a plurality of resistance are interconnected, there is an electric capacity over the ground at each place, point of crossing at the resistance line.Shape according to the elementary cell that forms RC network is different, RC network can be divided into the multiple RC network structure of triangle RC network, quadrilateral RC network, hexagon RC network, polygon RC network etc.Fig. 6 A-Fig. 6 F shows respectively the structure of triangle RC network and elementary cell, quadrilateral RC network and elementary cell thereof, hexagon RC network and elementary cell thereof.
Wherein, inhibit signal can be output terminal with respect to the inhibit signal of the rising edge of input end, also can be that output terminal is with respect to the inhibit signal of the negative edge of input end.
Among Fig. 1, pulse signal transceiver module 11 is according to the time-delay characteristics of RC circuit, and input pulse pumping signal on the induction module of contact can produce different time-delays at output terminal.Can according to concrete application and requirement, select to be loaded into frequency and the waveform of the pulse excitation signal on the induction module of contact.Fig. 7 A
-Fig. 7 D shows respectively the waveform of square-wave pulse pumping signal, sinusoidal wave pulse pumping signal, triangular pulse pumping signal, sawtooth pulse pumping signal.
Can also according to concrete application and requirement, select the different scanning mode that the contact induction module is scanned.All show exit 601, resistance 602, electric capacity 603 and the ground 604 of contact induction module among Fig. 6 B, Fig. 6 D, Fig. 6 F,, the exit 601 of contact induction module both can be used as input end, also can be used as output terminal, and was as shown in table 1.
The induction module input/output terminal definition of table 1 contact
Apply pulse excitation signal by diverse ways at the input end of some, detect the delay variation of appointed output terminal, be referred to as " scanning ".Typical scan mode has following several:
(1) four jiao of excitation scanning method
With the port on four angles of contact induction module exit as input end, with all exits of contact induction module as output terminal, apply simultaneously pulse excitation signal at all input ends, detect simultaneously the delay variation of all output terminals, this scanning method is called four jiaos of excitation scanning methods.Input end and the output terminal of four jiaos of excitation scanning methods arrange synoptic diagram respectively shown in Fig. 8 A and Fig. 8 B.Among Fig. 8 A and Fig. 8 B, the contact induction module can be RC network.
(2) scanning method line by line
With the exit (shown in Fig. 8 C) on contact induction module left part and top as input end, with the exit (shown in Fig. 8 D) of contact induction module right part and bottom as output terminal, sequentially apply line by line pulse excitation signal at input end, detect simultaneously the delay variation of all output terminals, this scanning method is called line by line scanning method.The input end of scanning method and output terminal arrange synoptic diagram respectively shown in Fig. 8 C and Fig. 8 D line by line.Among Fig. 8 C and Fig. 8 D, the contact induction module can be RC network.
(3) interlacing is every the column scan method
With the exit (shown in Fig. 8 C) on contact induction module left part and top as input end, with the exit (shown in Fig. 8 D) of contact induction module right part and bottom as output terminal, sequentially apply pulse excitation signal in the input end interlacing every row, detect simultaneously the delay variation of all output terminals, this scanning method is called line by line scanning method.
(4) full scan method
Both made input end with all exits of contact induction module and also made output terminal, and sequentially applied pulse excitation signal line by line at input end, and detected simultaneously the delay variation of all output terminals, this scanning method is called the full scan method.The input end of full scan method and output terminal arrange synoptic diagram respectively shown in Fig. 8 E3 and Fig. 8 F.Among Fig. 8 E and Fig. 8 F, the contact induction module can be RC network.
Certainly, in above-mentioned 3, the typical scan mode, also have other scan mode, also can be used for the contact induction module is scanned, enumerate no longer one by one herein.
Fig. 2 A is a kind of structural drawing of pulse signal transceiver module 11 among Fig. 1.Shown in Fig. 2 A, pulse signal transceiver module 11 can comprise any one in the first scanning element 111, the second scanning element 112, the 3rd scanning element 113 and the 4th scanning element 114, wherein, the first scanning element 111 is used for the port on four angles of contact induction module exit as input end, with all exits of contact induction module as output terminal, apply simultaneously pulse excitation signal at all input ends, receive when being touched and capable inhibit signal and the row inhibit signal of when not being touched generation at all output terminals; The second scanning element 112 is used for all row exits with all row exits of contact induction module first surface (with reference to the left part of figure 8C) and second (with reference to the top of figure 8C) as input end, with all row exits of all row exits of contact induction module the 3rd (with reference to the right part of figure 8D) and fourth face (with reference to the bottom of figure 8D) as output terminal, sequentially apply line by line pulse excitation signal at input end, receive when being touched and capable inhibit signal and the row inhibit signal of when not being touched generation at all output terminals, wherein, first surface, second, the 3rd, fourth face is sequentially continuous; The 3rd scanning element 113 is used for all row exits with all row exits of contact induction module first surface (with reference to the left part of figure 8C) and second (with reference to the top of figure 8C) as input end, with all row exits of all row exits of contact induction module the 3rd (with reference to the right part of figure 8D) and fourth face (with reference to the bottom of figure 8D) as output terminal, sequentially apply pulse excitation signal in the input end interlacing every row, receive capable inhibit signal and the row inhibit signal whether the contact induction module is touched and produces at all output terminals, wherein, first surface, second, the 3rd, fourth face is sequentially continuous; The 4th scanning element 114 is used for both having made input end with all exits of contact induction module and also makes output terminal, input end line by line order apply pulse excitation signal, receive when being touched and capable inhibit signal and the row inhibit signal of when not being touched generation at all output terminals.As seen, the scan mode that the first scanning element 111 adopts is four jiaos of excitation scanning methods, the scan mode that the second scanning element 112 adopts is scanning method line by line, the scan mode that the 3rd scanning element 113 adopts be interlacing every the column scan method, the scan mode that the 4th scanning element 114 adopts is the full scan method.
In other embodiments of the invention, pulse signal transceiver module 11 also can comprise any one or two among the first scanning element 111, the second scanning element 112 and the 3rd scanning element 113 threes, and does not comprise whole three unit.Certainly, in other embodiments of the invention, pulse signal transceiver module 11 also can comprise the scan function unit of other scan modes.
Fig. 2 B is a kind of structural drawing of processing module 12 among Fig. 1.Shown in Fig. 2 B, in the present embodiment, processing module 12 can comprise the first computing unit 121 and the second computing unit 122, the first computing unit 121 is connected with the second computing unit 122, the time difference of the row inhibit signal of generation when the row inhibit signal of generation and contact induction module were not touched when the time difference of the capable inhibit signal that the capable inhibit signal that produces when wherein, the first computing unit 121 is touched for calculating contact induction module and contact induction module produce when not being touched and calculating contact induction module were touched; The second computing unit 122 is used for determining according to the time difference of the time difference of row inhibit signal and row inhibit signal the position coordinates of contact.
Be further elaborated below by structure and the principle of a concrete application example to touch sensible locating device of the present invention.
Fig. 3 is the concrete structure figure of touch sensible locating device in the application example of the present invention.As shown in Figure 3, in this application example, the touch sensible locating device comprises pulse signal transceiver module 31, the first computing unit 32 and the second computing unit 33 that links to each other in turn, wherein, comprise the time difference digital quantizer Δ TDC (Delta-Time-to Digital Converter) and the register that are connected in the first computing unit 32, time difference digital quantizer Δ TDC is used for the time difference of computing relay signal, and is converted to digital signal; Register is used for storing the time difference of digital signal form.Touch sensible locating device shown in Figure 3, by pulse signal transceiver module 31 in the enterprising line scanning of contact induction module, with output terminal for pulse excitation signal in the capable inhibit signal and the row inhibit signal that finger touch (being that the contact induction module is touched) are arranged and produce during without finger touch (being that the contact induction module is not touched), through the first computing unit 32, calculate finger touch and row postpones and row postpone during without finger touch time difference, convert digital signal to, be stored in the register, again through the second computing unit 33, convert the position of a plurality of contacts to digital signal, thereby finish multifinger induction location.
Fig. 4 is a kind of concrete structure figure of the first computing unit 32 among Fig. 3, as shown in Figure 4, the first computing unit 32 can comprise time difference digital quantizer Δ TDC and the register that is connected, wherein, time difference digital quantizer Δ TDC comprises time delay chain, thick counter, dynamic storage and subtracter, time delay chain links to each other with thick counter, and dynamic storage links to each other with subtracter with time delay chain, thick counter respectively.
The course of work of time difference digital quantizer Δ TDC is:
1) by contact induction module input end is applied pulse excitation signal, after scanning, according to the RC time-delay characteristics, pulse signal transceiver module output terminal is m
OutGroup line delay signal and row time delayed signal, line delay signal and row time delayed signal obtain by behind the time delay chain and coarse counter of Δ TDC:
Without finger touch the time, the row delay is: (T
X_0, T
X_1, T
X_2..., T
X_N),
Row postpone: (T
Y_0, T
Y_1, T
Y_2..., T
Y_N);
When finger touch was arranged, the row delay was: (T
X_0f, T
X_1f, T
X_2f..., T
X_Nf),
Row postpone: (T
Y_0f, T
Y_1f, T
Y_2f..., T
Y_Nf);
When 2) dynamic storage will be without finger touch and the row when finger touch is arranged postpones and row postpone to be converted to digital signal;
3) subtracter calculates that trip postpones and row postpone finger touch is being arranged and time difference during without finger touch
Row postpones (Δ T):
ΔT
X_0＝a
0(T
X_0f-T
X_0)
ΔT
X_1＝a
1(T
X_1f-T
X_1)
………………………
Δ T
X_N=a
N(T
X_NF-T
X_N) a
0, a
1... a
N, be its coefficient;
Row postpone (Δ T):
ΔT
Y_0＝b
0(T
Y_0f-T
Y_0)
ΔT
Y_1＝b
1(T
Y_1f-T
Y_1)
………………………
Δ T
Y_N=b
N(T
Y_Nf-T
Y_N) b
0, b
1... b
N, be its coefficient;
This m
OutThe delay of group row and column is having finger touch and time difference during without finger touch, and the Δ TDC by preprocessing system 32 converts digital signal to, finally is stored in the register, waits for the further processing of after-treatment system 33.
Fig. 5 is a kind of concrete structure figure of the second computing unit 33 among Fig. 3, as shown in Figure 5, the second computing unit 33 can comprise processor CPU, direct memory access controller DMAC (Direct Memory Access Controller), flash memory FLASH control module, the internal integrated circuit I that links to each other by bus
2C interface unit, and the flash memory FLASH that links to each other with the FLASH control module.Again as shown in Figure 5, the second computing unit 33 can also comprise other system module, such as clock module, reseting module, interrupt module etc.
The course of work of the second computing unit 33 is:
Row delay and row that preprocessing system is stored in the register postpone the digital signal of the time difference when having or not finger touch by the access of bus and DMAC, in processor, do further computing, obtain the function of time of coordinate and time difference Δ T, according to principle of induction, the inductance capacitance Cf that staff brings directly reacts its Changing Pattern by Δ T, Cf=f (Δ T).
Δ T
(X)=f[c (Δ T
X_0, Δ T
X_1, Δ T
X_2..., Δ T
X_N)]: c is its coefficient.
Δ R
(Y)=f[d (Δ T
Y_0, Δ T
Y_1, Δ T
Y_2..., Δ T
Y_N)]: d is its coefficient.
(x, y)=f[e (Δ T
(X), Δ T
(Y))]: e is its coefficient
Processor can calculate the coordinate of contact by to a series of calculation process of time difference Δ T, final location, position of realizing single-point, 2 or multiple spot.Processor is stored in coordinate data among the FLASH by the FLASH control module, passes through at last I
2Coordinate data is exported in the C interface unit.
Compared with prior art, touch sensible locating device of the present invention has following advantage:
1) touch sensible locating device of the present invention adopts digital Δ TDC, and precision is high, and resolution is greater than 1ps;
2) ADC of application mainly detected voltage and charge variation during tradition touched and detects, affected by noise larger, touch sensible locating device of the present invention adopts digital Δ TDC, Δ TDC detects the time variation amount of relative coordinate, function with automatic calibration, be not subjected to the impact of external environment and noise, strong interference immunity;
3) touch sensible locating device of the present invention adopts digital Δ TDC, touches the ADC that uses in the detection with tradition and compares, and is low in energy consumption;
4) touch sensible locating device of the present invention adopts digital Δ TDC, touches the ADC that uses in the detection with tradition and compares, and area is little;
5) touch sensible locating device of the present invention is widely used, and the touch that is fit to various contacts induction module detects, and is not limited to double-deck self-capacitance screen;
6) touch sensible locating device of the present invention also can be used for the touch detection of other networks.
The invention allows for a kind of touch sensible positioning system.This touch sensible positioning system comprises above-mentioned touch sensible locating device, also comprises the contact induction module.Whether wherein, the contact induction module be used for receives the pulse excitation signal that the touch sensible locating device provides, and be touched according to the contact induction module and export capable inhibit signal and row inhibit signal.
Wherein, the contact induction module can be mutual capacitance screen, double-deck self-capacitance screen or individual layer ITO touch-screen.
Touch sensible positioning system using numeral Δ TDC of the present invention, touch the ADC that uses in the detection with tradition and compare, have advantage applied widely, low in energy consumption, and, by adopting digital Δ TDC, touch sensible positioning system of the present invention also has the advantage of precision height, strong interference immunity.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a touch sensible locating device is characterized in that, comprising:
Whether the pulse signal transceiver module is used for applying pulse excitation signal at the input end of contact induction module, and is touched according to described contact induction module, receives capable inhibit signal and the row inhibit signal of its generation at output terminal;
Processing module, the position that the described row inhibit signal that produces for whether being touched according to described contact induction module and described row inhibit signal are determined the contact.
2. touch sensible locating device according to claim 1 is characterized in that:
Described processing module comprises:
The first computing unit, the time difference of the row inhibit signal of generation when the row inhibit signal of the time difference of the capable inhibit signal that the capable inhibit signal that produces when being used for calculating described contact induction module and being touched produces when not being touched with described contact induction module and generation when calculating described contact induction module and being touched and described contact induction module are not touched;
The second computing unit is used for determining according to the time difference of the time difference of described row inhibit signal and described row inhibit signal the position coordinates of contact.
3. touch sensible locating device according to claim 2 is characterized in that:
Described the first computing unit comprises:
The time difference digital quantizer is used for the time difference of computing relay signal, and is converted to digital signal;
Register is used for storing the time difference of digital signal form.
4. touch sensible locating device according to claim 3 is characterized in that:
Described time difference digital quantizer comprises time delay chain, thick counter, dynamic storage and subtracter, and described time delay chain links to each other with thick counter, and described dynamic storage links to each other with subtracter with described time delay chain, thick counter respectively.
5. touch sensible locating device according to claim 2 is characterized in that:
Described the second computing unit comprises processor, direct memory access controller DMAC, FLASH control module, the internal integrated circuit I that links to each other by bus
2C interface unit, and the FLASH that links to each other with described FLASH control module.
6. touch sensible locating device according to claim 1 is characterized in that:
Described pulse signal transceiver module comprises such as in the lower unit any one:
The first scanning element, be used for the port on four angles of described contact induction module exit as input end, with all exits of described contact induction module as output terminal, apply simultaneously pulse excitation signal at all input ends, receive capable inhibit signal and the row inhibit signal whether described contact induction module is touched and produces at all output terminals;
The second scanning element, be used for all row exits with all row exits of described contact induction module first surface and second as input end, with all row exits of all row exits of the 3rd of described contact induction module and fourth face as output terminal, sequentially apply line by line pulse excitation signal at input end, receive capable inhibit signal and the row inhibit signal whether described contact induction module is touched and produces at all output terminals, described first surface, second, the 3rd, fourth face are sequentially continuous;
The 3rd scanning element, be used for all row exits with all row exits of described contact induction module first surface and second as input end, with all row exits of all row exits of the 3rd of described contact induction module and fourth face as output terminal, sequentially apply pulse excitation signal in the input end interlacing every row, receive capable inhibit signal and the row inhibit signal whether described contact induction module is touched and produces at all output terminals, described first surface, second, the 3rd, fourth face are sequentially continuous;
The 4th scanning element, be used for both having made input end with all exits of contact induction module and also make output terminal, sequentially apply line by line pulse excitation signal at input end, receive capable inhibit signal and the row inhibit signal whether described contact induction module is touched and produces at all output terminals.
7. touch sensible locating device according to claim 1 is characterized in that:
Described pulse excitation signal is square-wave pulse pumping signal, triangular pulse pumping signal, sinusoidal wave pulse pumping signal or sawtooth pulse pumping signal.
8. touch sensible positioning system, it is characterized in that, comprise the claims 1 to 5 each described touch sensible locating device, also comprise the contact induction module, whether described contact induction module is used for receiving the pulse excitation signal that described touch sensible locating device provides, and be touched according to it and export capable inhibit signal and row inhibit signal.
9. touch sensible positioning system according to claim 8 is characterized in that, described contact induction module is mutual capacitance screen, double-deck self-capacitance screen, individual layer ITO touch-screen, touch panel or electronics skin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110206405.7A CN102890575B (en) | 2011-07-22 | 2011-07-22 | A kind of touch sensible positioner and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110206405.7A CN102890575B (en) | 2011-07-22 | 2011-07-22 | A kind of touch sensible positioner and system |
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| CN102890575A true CN102890575A (en) | 2013-01-23 |
| CN102890575B CN102890575B (en) | 2016-09-14 |
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| CN103902125A (en) * | 2014-03-28 | 2014-07-02 | 上海交通大学 | Projected capacitive touch panel on basis of single-layer touch sensors and positioning method implemented by projected capacitive touch panel |
| CN104808839A (en) * | 2014-01-28 | 2015-07-29 | 三星显示有限公司 | Display device including a touch panel |
| WO2016106832A1 (en) * | 2014-12-31 | 2016-07-07 | 深圳市华星光电技术有限公司 | Self-capacitance touch sensing device, touch point positioning method and display apparatus |
| CN112237486A (en) * | 2019-07-16 | 2021-01-19 | 上海诚恒医疗器械有限公司 | Split wireless detection mask and detection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104808839A (en) * | 2014-01-28 | 2015-07-29 | 三星显示有限公司 | Display device including a touch panel |
| CN104808839B (en) * | 2014-01-28 | 2019-10-25 | 三星显示有限公司 | Touch sensitive display device and touch sensitive input devices |
| CN103902125A (en) * | 2014-03-28 | 2014-07-02 | 上海交通大学 | Projected capacitive touch panel on basis of single-layer touch sensors and positioning method implemented by projected capacitive touch panel |
| WO2016106832A1 (en) * | 2014-12-31 | 2016-07-07 | 深圳市华星光电技术有限公司 | Self-capacitance touch sensing device, touch point positioning method and display apparatus |
| CN112237486A (en) * | 2019-07-16 | 2021-01-19 | 上海诚恒医疗器械有限公司 | Split wireless detection mask and detection method thereof |
| CN112237486B (en) * | 2019-07-16 | 2022-08-02 | 罗慕科技(北京)有限公司 | Split wireless detection mask and detection method thereof |
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| CN102890575B (en) | 2016-09-14 |
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