CN1952863A - Touch type induction system - Google Patents
Touch type induction system Download PDFInfo
- Publication number
- CN1952863A CN1952863A CN 200510100493 CN200510100493A CN1952863A CN 1952863 A CN1952863 A CN 1952863A CN 200510100493 CN200510100493 CN 200510100493 CN 200510100493 A CN200510100493 A CN 200510100493A CN 1952863 A CN1952863 A CN 1952863A
- Authority
- CN
- China
- Prior art keywords
- circuit
- gate circuit
- inductor
- signal source
- touch type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Electronic Switches (AREA)
Abstract
本发明提供一种触摸式感应装置。该装置包括：一差分信号源，产生两个频率相同，相位相反的交流信号；两个导电体，分别与该差分信号源的正负两个输入端相连；一感应器，用于接收物体触摸时产生的杂讯，其位于该两个导电体之间，并与其构成两个电容；一信号源，有两个输入端，分别通过一负载电路与一门电路的两个输入连接，该两个输入端的输入信号相同；该门电路，可在两个输入端的输入信号相同时，其输出为第一状态，在两个输入端的输入信号不同时，其输出为第二状态，在物体触摸感应器时，该感应器感应该物体所带的杂讯，使得该门电路的两个输入端的输入信号不再相同，从而使其输出从第一状态变为第二状态。使用该装置，可提高感应杂讯的灵敏度，且电路简单，可降低成本。
The invention provides a touch sensing device. The device includes: a differential signal source, which generates two AC signals with the same frequency and opposite phases; two conductors, which are respectively connected to the positive and negative input terminals of the differential signal source; an inductor, which is used to receive objects touched The noise generated when it is located between the two conductors and forms two capacitors with it; a signal source has two input terminals, which are respectively connected to two inputs of a gate circuit through a load circuit, and the two The input signals of the two input terminals are the same; the gate circuit can output the first state when the input signals of the two input terminals are the same, and the output is the second state when the input signals of the two input terminals are different. When the sensor is used, the sensor senses the noise carried by the object, so that the input signals of the two input terminals of the gate circuit are no longer the same, so that the output of the gate circuit changes from the first state to the second state. By using the device, the sensitivity of sensing noise can be improved, and the circuit is simple and the cost can be reduced.
Description
[technical field]
The invention relates to a kind of touch type inductor, particularly about a kind of induction installation by the touch sensible noise.
[background technology]
Now existing various types of induction installations, and be applied to department of computer science and unify during other uses, it is a kind of that people are familiar with the most in this device is computing machine " Genius mouse ".Although Genius mouse is extremely general as the position indicating equipment, precisely because have mechanical part, and require to have a plane, make the position ball to roll thereon, and for rational resolution is arranged, Genius mouse need roll usually than long distance, last Genius mouse needs the user to lift hand so that cursor moves, thus the fundamental purpose of having disturbed people to key in from computing machine.
People attempt to provide a kind of device through multiple trial, and to detect as the thumb of indicating equipment or the position of other finger, to replace Genius mouse, the ideal behavior of this equipment is low-power consumption, high resolving power, low cost.Now existing polytype touch type inductor is as resistance-type, inductance type and condenser type.
The patent No. of bulletin is 6534970 patent as United States Patent (USP) trademark office on March 18th, 2003, it has disclosed a kind of rotary location detecting technology that utilizes the inductance technology, described technology comprises two parts, first is by centering on the magnetic field that rotatablely moves and change of turning axle on the space, second portion comprises that two inductors are used for responding to the magnetic field that first produces, and produce corresponding signal, above-mentioned signal changes along with the variation of the relative angle of first and second portion, then can measure the relative position of first and second portion according to the signal that changes.
The patent No. of bulletin is 6545614 patent as United States Patent (USP) trademark office on April 8th, 2003.It has disclosed a kind of resistance induction installation, this device comprises an oscillation circuit unit and an electronic nodes unit, described oscillation circuit unit provides a radio-frequency signal for the electronic nodes unit, if detector detects the touch of object as finger, the impedance of electronic nodes unit will with variation, the resistance of the input end of resistance that then produces when the finger touch electronic nodes and electronics economize on electricity is complementary, reflection wave diminishes, and can determine that object touches by the detection of reflected ripple and with itself and a Discr. unit comparison if reflectance diminishes.
The patent No. of United States Patent (USP) trademark office bulletin on February 27th, 1996 is 5495077 patent for another example, and it has disclosed a kind of electric capacity position sensor, and described inductor has a characteristic electric capacity on the lead on the vertical and horizontal direction that links to each other with induction bonding pad.Described electric capacity will change with respect to the motion of induction matrix along with the activity of the touch of object or object, the changes in capacitance of each intersection point of X and Y direction is converted into the voltage on X and the Y direction in the matrix, and these voltages produce the electronic signal of representing the object center after the processing of circuit by analysis.
Though above-mentioned patented technology has had improvement on performance, fast as response speed, the resolution height, simple to operate, the equal more complicated of its structure and circuit, production cost is also higher, and its power consumption is bigger, the not high easy generation maloperation of finger accuracy of sensors.
[summary of the invention]
Based on foregoing, the object of the present invention is to provide a kind of touch type inductor, this induction installation can pass through the noise of touch sensible object, thereby realizes the function of expection.
The objective of the invention is to realize, a kind of touch type inductor is provided by following scheme.This device comprises: a differential signal source; Two electric conductors link to each other with positive and negative two input ends of this differential signal source respectively; One inductor, its between these two electric conductors, and with two electric capacity of its formation; One gate circuit; One signal source, two output terminals are arranged, one output terminal connects one of one first load circuit end, the other end of this first load circuit is connected to this gate circuit one input end, another output terminal of this signal source connects one second load circuit, and this second load circuit and this inductor are connected to another input end of this gate circuit jointly.
Compared to prior art, described touch type inductor can effectively reduce noise in the surrounding environment to the influence of this induction installation, and adopt gate circuit, can effectively improve the sensitivity of induction, and its simple circuit also can reduce manufacturing cost.
[description of drawings]
Fig. 1 is the circuit diagram of the embodiment of touch type inductor.
Fig. 2 is the pulse change figure of embodiment these induction installation input and output before and after object touches of touch type inductor.
[embodiment]
See also Fig. 1, be the circuit diagram of the embodiment of touch type inductor.This touch type inductor comprises a differential signal source 11, two electric conductors 12, an inductor 13, a signal source 14, one first load circuit 18, one second load circuit 19, a gate circuit 15, a detector 16 and signal processing circuits 17, wherein, in the present embodiment, this first load circuit 18 can be made of a capacitor C and one first resistance R 1, and this second load circuit 19 can be made of one second resistance R 2.One of them is connected the positive and negative polarities of this differential signal source 11 with this two electric conductors 12 respectively; This inductor 13 is between these two electric conductors 12, constitute two electric capacity with these two electric conductors 12, this signal source 14 has two input ends, wherein an input end connects this second resistance R 2, this second resistance R 2 is connected to one of this gate circuit 15 input end jointly with this inductor, another input end of this signal source 14 connects this first resistance R 1, this first resistance R 1 and this capacitor C are connected to another input end of this gate circuit 15 jointly, one of this capacitor C end ground connection, the output terminal of this gate circuit 15 connects the input end of this detector 16, and the output terminal of this detector 16 connects this signal processing circuit 17.
This differential signal source 11 is used to produce two frequencies and equates, the AC signal that phase place is opposite, when the noise in the surrounding environment acts on the above-mentioned electric capacity that is made of this differential signal source 11 and these two electric conductors, because these two electric conductors 12 link to each other with the both positive and negative polarity of this differential signal source 11 respectively, then the noise in the surrounding environment is cancelled out each other, reduce of the influence of surrounding environment noise to circuit, two input ends of this signal source 14 connect two load circuits respectively, can be these two load circuits provides the signal of identical size and direction, scalable first resistance R 1, the size of second resistance R 2 and capacitor C, make that the input signal of 15 two input ends of this gate circuit is identical, this gate circuit 15 is when the input signal of two input end is identical, it is output as one first state, at the input signal of two input end not simultaneously, it is output as one second state.What this gate circuit 15 adopted in the present embodiment is XOR gate, be that input signal is when identical, it is output as low level, at input signal not simultaneously, it is output as high level, at object (as finger) when touching this inductor 13, these inductor 13 sense objects with noise, the input end input signal of this gate circuit 15 that links to each other with this inductor 13 is postponed, make the input signal of two input end no longer identical, thereby cause the variation of the output pulse of this gate circuit, concrete pulse change sees also Fig. 2, detector 16 detects this variation, gets final product the touch of judgment object, and 17 pairs of these signals of signal processing circuit are handled to realize control corresponding, wherein, the object touch inductor can directly touch, also can be across other objects, as insulants such as plastic plates.
See also Fig. 2, touch the pulse change figure of these induction installation input and output of front and back for the embodiment of touch type inductor at object.As shown, pulse A and pulse B are the pulse diagram of the input signal of two input ends of this gate circuit 15 before object touches, the size of these two signals, direction is all identical, pulse C is the pulse diagram of the output terminal output signal of this gate circuit 15, what adopt in the present embodiment is XOR gate, characteristic according to this XOR gate, be that input signal is identical, be output as low level, the input signal difference is output as high level, then can be output as low level by this gate circuit 15, and this detector 16 is every the time detecting of two/one-period of this signal source 14 signal that the produces output terminal of this gate circuit 15 once, if this gate circuit 15 of detecting is output as low level, then the signal of this detector 15 also is low, if this gate circuit 15 is output as high level, then the output signal of this detector 16 also is a high level, when object does not touch, the output of this gate circuit 15 is in low level state always, and then the signal of this detector 16 also is a low level state, specifically shown in pulsed D.
When object touches this inductor 13, these inductor 13 sense objects with noise, the phase place of the input end input signal that links to each other with this inductor 13 is postponed, shown in pulse B-sense, characteristics according to the XOR gate that adopts in this real mode, input signal is not simultaneously, be output as high level, then the output signal of this gate circuit 15 obtains changing for continuing low level state, if object leaves this inductor 13, then the input signal of two of this gate circuit 15 input ends returns to identical state again, then its output also reverts to low level, specifically shown in pulse C-sense, when this detector 16 has high level to produce at the output terminal that detects this gate circuit 15, then the signal of this detector 16 is set to high level, when object leaves this inductor 13, the detection signal that corresponding this detector 16 is detected also becomes low level with this gate circuit 15, specifically shown in pulsed D-sense, at this, the time that can continue high level according to the output signal of this detector 16 judges that this object touches the time of this induction installation.
Claims (6)
1. a touch type inductor is characterized in that, this device comprises:
One differential signal source; Two electric conductors link to each other with positive and negative two input ends of this differential signal source respectively; One inductor, its between these two electric conductors, and with two electric capacity of its formation; One gate circuit; One signal source, two output terminals are arranged, one output terminal connects one of one first load circuit end, the other end of this first load circuit is connected to this gate circuit one input end, another output terminal of this signal source connects one second load circuit, and this second load circuit and this inductor are connected to another input end of this gate circuit jointly.
2. touch type inductor as claimed in claim 1 is characterized in that, this first load circuit can be made of electric capacity and one first resistance, and this first resistance links to each other with this signal source, and this electric capacity and this first resistance are connected to one of this gate circuit input end jointly.
3. touch type inductor as claimed in claim 1 is characterized in that, this second load circuit can be made of one second resistance.
4. touch type inductor as claimed in claim 1 is characterized in that this induction installation also comprises a detector, is connected in the output terminal of this gate circuit, is used to detect the signal by this gate circuit output.
5. touch type inductor as claimed in claim 4 is characterized in that this touch type inductor also comprises a signal processing circuit, is connected in signal processing circuit, is used to handle the signal of this detector detecting.
6. touch type inductor as claimed in claim 1 is characterized in that this gate circuit can be XOR gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510100493A CN1952863B (en) | 2005-10-18 | 2005-10-18 | Touch type induction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510100493A CN1952863B (en) | 2005-10-18 | 2005-10-18 | Touch type induction system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1952863A true CN1952863A (en) | 2007-04-25 |
| CN1952863B CN1952863B (en) | 2010-05-05 |
Family
ID=38059227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510100493A Expired - Fee Related CN1952863B (en) | 2005-10-18 | 2005-10-18 | Touch type induction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1952863B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315287B (en) * | 2007-06-01 | 2010-12-15 | 凌通科技股份有限公司 | capacitive touch sensor |
| CN101980123B (en) * | 2009-08-25 | 2012-07-04 | 友达光电股份有限公司 | Touch panel device with high touch sensitivity and touch positioning method thereof |
| CN104181455A (en) * | 2013-05-27 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Fault detection alarm circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3484355B2 (en) * | 1998-09-28 | 2004-01-06 | オムロンヘルスケア株式会社 | Biological detector |
| KR100449745B1 (en) * | 2002-11-21 | 2004-09-22 | 삼성전자주식회사 | Apparatus and Method for avoiding noise of touch screen |
-
2005
- 2005-10-18 CN CN200510100493A patent/CN1952863B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315287B (en) * | 2007-06-01 | 2010-12-15 | 凌通科技股份有限公司 | capacitive touch sensor |
| CN101980123B (en) * | 2009-08-25 | 2012-07-04 | 友达光电股份有限公司 | Touch panel device with high touch sensitivity and touch positioning method thereof |
| CN104181455A (en) * | 2013-05-27 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Fault detection alarm circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1952863B (en) | 2010-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103150072B (en) | Touch device and touch method thereof | |
| US8400425B2 (en) | Method and device for analyzing positions | |
| JP4981113B2 (en) | Multi-point detection method for capacitive touch panel | |
| CN100419655C (en) | Touch type induction device | |
| CN101937296A (en) | Capacitive -inductive touch screen | |
| TW200849074A (en) | Two-dimensional position sensor | |
| CN101382860B (en) | Method for positioning multiple touch positions of capacitive touch panel | |
| US9218095B2 (en) | Non-linear feedback capacitance sensing | |
| US7714848B2 (en) | Touch sensing apparatus | |
| CN114487784A (en) | Capacitance detection circuit, touch chip and electronic equipment | |
| CN109426380A (en) | Touch device, sensing method thereof and touch sensing circuit | |
| TWI517014B (en) | Method and device for identifying touch signal | |
| US20070084645A1 (en) | Touch sensing apparatus | |
| CN100426211C (en) | Touch type induction system | |
| CN1952863B (en) | Touch type induction system | |
| CN100517201C (en) | Touch induction system | |
| CN100489888C (en) | Touch sensing device | |
| CN101004652B (en) | Touch Sensing Device | |
| CN103713782B (en) | Capacitive touch panel | |
| CN101025670A (en) | Touch sensing device and its realizing method | |
| TWI291124B (en) | The touch sensing apparatus | |
| KR101926546B1 (en) | Position sensing method of touch panel and integrated circuit | |
| CN102043513B (en) | Method and device for distinguishing single-touch or multi-touch | |
| CN223092404U (en) | Position sensing device | |
| CN100573427C (en) | Touch Sensing Device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20100505 Termination date: 20141018 |
|
| EXPY | Termination of patent right or utility model |