CN205003643U - Capacitive touch screen - Google Patents
Capacitive touch screen Download PDFInfo
- Publication number
- CN205003643U CN205003643U CN201520614710.3U CN201520614710U CN205003643U CN 205003643 U CN205003643 U CN 205003643U CN 201520614710 U CN201520614710 U CN 201520614710U CN 205003643 U CN205003643 U CN 205003643U
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- CN
- China
- Prior art keywords
- touch
- electrode
- screen
- circuit
- capacitive touch
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Abstract
The utility model discloses a capacitive touch screen belongs to touch -sensitive screen technical field, the utility model discloses an its characterized in that of capacitive touch screen includes base plate and circuit, and wherein the circuit includes touch -sensitive source and signal detection circuit, is provided with the electrode on the base plate, and electrode quantity >= 2, touch -sensitive source follower end, signal detection circuit connect in the electrode line steerablely. Control the touch -sensitive screen even if make the user take gloves, the touch -sensitive screen is feedback information very quickly also.
Description
Technical field
The utility model relates to touch screen technology field, particularly a kind of capacitive touch screen.
Background technology
Capacitance-type touch screen technology utilizes the electric current of human body to respond to carry out work.Capacitive touch screen is one piece of four layers of compound glass screen, current capacitive touch screen, no matter be flat capacitance type touch-screen or projected capacitive touch screen, when use overlapping with display screen, if do not arrange screen layer between display screen and touch-screen, display on display screen or display state, can produce interference by the coupling capacitance between display screen and touch-screen to touch signal, have influence on the reliability of touch-screen work.If arrange screen layer between display screen and touch-screen, screen layer has the transmissivity that can lower touch-screen to affect display quality, also can bring the increase of cost; If do not arrange screen layer between display screen and touch-screen, but judge that software is to eliminate the interference of display, also can consume suitable computational resource to calculate and to screen, make the slack-off cost up of speed of detection.Another weakness of capacitive touch screen is, only to operate touch-screen with finger as touch objects.When operator is with left-hand seat cover to touch, the reaction of capacitive touch screen can become very blunt, even cisco unity malfunction, more cannot with conventional nonmetal felt pen operation touch-screen.In addition, capacitive touch screen also also exists the problem of water resistance difference.Water droplet on touch-screen or even aqueous vapor make the dielectric coefficient of capacitive touch screen surrounding enviroment change, and the reliability of capacitive touch screen is gone wrong.
Summary of the invention
When the purpose of this utility model is not raise the cost, even if make user bring gloves to manipulate touch-screen, touch-screen also can feedback information very promptly.Make touch-screen energy waterproof simultaneously.
A kind of capacitive touch screen disclosed in the utility model, it comprises substrate and circuit, wherein circuit comprises touch sensible source and signal deteching circuit, substrate is provided with electrode, number of electrodes >=2, touch sensible source output terminal is controllably connected to electrode wires, and signal deteching circuit controllably can be connected to electrode wires.
Capacitive touch screen disclosed in the utility model, its electrode comprises a few return electrode of detecting electrode, and the electrode wires of part or all of return electrode and detecting electrode is non-intersect.
Capacitive touch screen disclosed in the utility model, wherein electrode is at least divided into 2 groups, and each group electrode is arranged at different substrate, or mutually isolated by insulating material after be arranged on same substrate.
Capacitive touch screen disclosed in the utility model is wherein transparency carrier substantially.
Capacitive touch screen disclosed in the utility model, wherein detecting electrode and return electrode are communicated in the different output terminal of same induction source, or are connected to different induction sources.
Capacitive touch screen disclosed in the utility model, touch-screen or there is touch-screen application product on establish the return electrode of touch signal, touching the closed-loop path forming touch signal between circuit and touch electrode, again touch system and other system are kept apart, reduce the crosstalk of signal between different system, prevent other signals particularly display on touch detection impact.Touch the closed-loop path defining touch signal between the touch electrode on circuit and touch-screen, touch objects changes the coupling capacitance between Different electrodes line, allows operator bring gloves also can work well, allows nonmetal pen and metal pen operate touch-screen.Touch signal loop on touch-screen, also reduces the crosstalk flowing of touch signal between each bar touch electrode of touch-screen, improves the accuracy judged the pole that gets an electric shock, the digitized capacitive touch screen in implementation space.Application product shell body arranges touch return electrode, touches at the touch electrode touched on circuit, touch-screen and shell body the closed-loop path setting up touch signal between return electrode, avoid water droplet to the impact touching the generation of circuit judges touch signal.
Accompanying drawing explanation
Figure of description is to explain the utility model further, is not the restriction to utility model protection invention scope
Fig. 1 is structural representation of the present utility model.
In figure, 1 is touch sensible source, and 2 is signal deteching circuit, and 3 is substrate.
Embodiment
Embodiment is to explain the utility model further, is not the restriction to utility model protection invention scope.
Embodiment 1
The utility model discloses a kind of capacitive touch screen, comprise touch pad and touch circuit etc.Touch pad is provided with two groups with insulation course mutually orthogonal column electrode group separately and row electrode group.Touch circuit and there is touch sensible source and touch signal testing circuit.Touch signal testing circuit is made up of input passage, data sampling channel, data processing and time schedule controller; Input passage has touch signal sampling element, impact damper, differential amplifier circuit etc.; Data sampling channel has analog to digital conversion circuit; Data processing and sequential control circuit are the central processing units (CPU, MCU) with data operation ability, data input and output interfaces, and central processing unit has control software design, data processing software.Touch the touch signal testing circuit of circuit, allow the electrode wires in column electrode group be communicated with the output terminal in touch sensible source, as the return electrode of touch signal; Select the electrode wires in column electrode group to be detecting electrode, allow electrode wires be all communicated with by the output terminal of touch signal sampling element with touch sensible source, other circuit of touch signal testing circuit connect the two ends of touch signal sampling element; Again by the coupling capacitance between electrode wires and electrode wires, coupling capacitance between electrode wires and electrode wires, form the closed touch loop of touch signal; Remaining row electrode lines all in column electrode group are allowed all directly to be communicated with the output terminal in touch sensible source with all row electrode wires of row electrode group.From touch sensible source output terminal through touch signal sampling element flow into row electrode lines and touch signal, when the finger of the people as touch objects comes close to or in contact with row electrode lines, because finger has certain width, also just touch row electrode lines simultaneously, the dielectric coefficient of human body is much larger than the dielectric coefficient of air, make the capacitance of coupling capacitance increase capacitive reactance to reduce, the electric current touching touch signal on loop strains greatly mutually, touch circuit with scan mode, the each electrode wires of touch-screen is sequentially allowed to be communicated with the output terminal in touch sensible source, the touch electrode line simultaneously making its both sides adjacent is communicated with the output terminal in touch sensible source by touch signal sampling element, remaining electrode wires all are allowed also to be communicated with the output terminal in touch sensible source, touch signal testing circuit detects the change flowing through touch signal electric current on touch signal sampling element simultaneously, find out touch signal curent change maximum and the touch electrode line exceeding certain threshold value is the polar curve that gets an electric shock, with the touch location of the crossover location of the polar curve that gets an electric shock in polar curve and row electrode group that gets an electric shock in column electrode group for finger.Judge to get an electric shock the condition of polar curve, also can only to detect that the touch signal variable quantity flowed through exceedes certain electrode wires set threshold value as the polar curve that gets an electric shock, the multiple point touching while of allowing capacitive touch screen allow.Because touch signal flows from the closed-loop path formed between the different touch electrode lines on touch pad at touch circuit, when touch objects comes close to or in contact with touch-screen with the non-metallic objectsit is not a metal object that dielectric coefficient is different from air dielectric coefficient, also be to change the coupling capacitance between adjacent touch electrode wires, cause the change touching touch signal electric current on loop, allow nonmetal touch objects (as common felt pen) also may be used for operating capacitance touch-screen; When touch objects comes close to or in contact with touch-screen with metal object, metal object changes the efficient coupling distance between adjacent touch electrode wires, thus the coupling capacitance changed between touch electrode line, cause the change of touch signal electric current on loop, allow metal touch thing (as metal touch pen) also may be used for operating capacitance touch-screen.Also can, in the detection period, the row electrode lines in column electrode group be allowed all to be communicated with the output terminal in touch sensible source, as the return electrode of touch signal; Allow row electrode lines be all communicated with by the output terminal of touch signal sampling element with touch sensible source, other circuit of touch signal testing circuit connect the two ends of touch signal sampling element; To allow in column electrode group remaining row electrode lines all with allow all row electrode wires of row electrode group and be also all communicated with the output terminal in touch sensible source.When touch objects comes close to or in contact with row electrode lines, the coupling capacitance between the coupling capacitance between electrode wires, electrode wires can be made equally, coupling capacitance between electrode wires and electrode wires all changes, by detecting the change flowing through touch signal electric current on touch signal sampling element, the polar curve that gets an electric shock can be found out.
Claims (4)
1. a capacitive touch screen, it is characterized in that comprising substrate and circuit, wherein circuit comprises touch sensible source and signal deteching circuit, substrate is provided with electrode, number of electrodes >=2, electrode comprises detecting electrode and return electrode, and the electrode wires of part or all of return electrode and detecting electrode is non-intersect, and touch sensible source output terminal, signal deteching circuit are controllably connected to electrode wires.
2. capacitive touch screen according to claim 1, is characterized in that electrode is at least divided into 2 groups, and each group electrode is arranged at different substrate, or mutually isolated by insulating material after be arranged on same substrate.
3. capacitive touch screen according to claim 1, is characterized in that substrate is transparency carrier.
4. capacitive touch screen according to claim 1, is characterized in that detecting electrode and return electrode are communicated in the different output terminal of same induction source, or is connected to different induction sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520614710.3U CN205003643U (en) | 2015-08-17 | 2015-08-17 | Capacitive touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520614710.3U CN205003643U (en) | 2015-08-17 | 2015-08-17 | Capacitive touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205003643U true CN205003643U (en) | 2016-01-27 |
Family
ID=55160521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520614710.3U Expired - Fee Related CN205003643U (en) | 2015-08-17 | 2015-08-17 | Capacitive touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205003643U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113377224A (en) * | 2020-03-09 | 2021-09-10 | 纮康科技股份有限公司 | Multi-mode operation method for capacitive touch panel and computing equipment |
-
2015
- 2015-08-17 CN CN201520614710.3U patent/CN205003643U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113377224A (en) * | 2020-03-09 | 2021-09-10 | 纮康科技股份有限公司 | Multi-mode operation method for capacitive touch panel and computing equipment |
| CN113377224B (en) * | 2020-03-09 | 2024-04-02 | 纮康科技股份有限公司 | Multi-mode operation method for capacitive touch panel and computing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160127 Termination date: 20200817 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |