CN202995693U - Push type capacitance screen - Google Patents
Push type capacitance screen Download PDFInfo
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- CN202995693U CN202995693U CN 201220651469 CN201220651469U CN202995693U CN 202995693 U CN202995693 U CN 202995693U CN 201220651469 CN201220651469 CN 201220651469 CN 201220651469 U CN201220651469 U CN 201220651469U CN 202995693 U CN202995693 U CN 202995693U
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- ito conductive
- capacitance plate
- capacitance screen
- push type
- plate body
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Abstract
The utility model discloses a push type capacitance screen which comprises a capacitance screen body. A contact side and a non-contact side of the capacitance screen body are respectively and correspondingly formed on a front face and a back face of the capacitance screen body. A flexible ITO conductive thin film is arranged on the contact side of the capacitance screen body, flexible supports are evenly distributed between the flexible ITO conductive thin film and the capacitance screen body, and an ITO conductive layer is formed on the non-contact side of the capacitance screen body. An electrode is led out from the flexible ITO conductive thin film to be connected with a positive electrode of the power supply. An electrode is led out from the ITO conductive layer to be connected with a negative electrode of the power supply. The flexible ITO conductive thin film, the ITO conductive layer and the flexible supports are arranged on the capacitance screen body of the push type capacitance screen in a matched mode, so that the push type capacitance screen can be used for detecting touch of insulators such as plastic and meet using requirements of users.
Description
Technical field
The utility model relates to the touch screen technology field, relates in particular to a kind of push type capacitance plate that detects any touch objects touch function that has.
Background technology
It (is Surface Capacitive Touch that capacitive touch screen is divided into based on the surface capacitance type touching technique, be called for short SCT) the surface capacitance touch screen and based on the projecting type capacitor touch screen of projected capacitive touching technique (be Projected Capacitive Touch, be called for short PCT).Because projecting type capacitor touch screen specific surface capacitive touch screen has more superior performance and longer serviceable life, therefore, projecting type capacitor touch screen is widely used in life, wherein the principle of work of projecting type capacitor touch screen is specially: at first, be divided into a plurality of capacitive touch screen and the sizable sensing unit of Pixel Dimensions by effective Electronic Control, then, adopt superfine single track tinsel to carry out permutation. last, these single track tinsels are connected to control panel.Because every one metal wire has oneself fixing electromagnetic oscillation frequency, the glass surface that touches capacitive touch screen can cause the change of tinsel oscillation frequency, the situation of change of tinsel oscillation frequency is detected by control panel simultaneously, determines the touch point by control panel and kernel program at last.Compare with the surface capacitance touch screen, because the sensing unit based on the projecting type capacitor touch screen of PCT technology is Embedded, therefore have good stability, be not easy to be disturbed, and be not easy the advantage such as damage.
But, even projecting type capacitor touch screen, can not be for detection of the touch of the insulators such as similar plastics, this is the shortcoming of capacitive touch screen maximum.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of push type capacitance plate, and it can detect the touch of the insulators such as similar plastics.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model content is specific as follows:
A kind of push type capacitance plate, it comprises the capacitance plate body, the front and back of described capacitance plate body corresponds to respectively touch side and the non-touch side of capacitance plate body; The touch side of described capacitance plate body is provided with flexible ITO conductive film, is evenly equipped with sinking support between described flexible ITO conductive film and capacitance plate body, and described non-touch side is provided with the ITO conductive layer; Described flexible ITO conductive film is drawn the positive pole that an electrode removes to connect a power supply; Described ITO conductive layer is drawn the negative pole that an electrode removes to connect described power supply.
Preferably, described sinking support is rubber bearing.
In order to improve the detection sensitivity of push type capacitance plate, preferably, the air line distance between described flexible ITO conductive film and described ITO conductive layer is no more than the twice of described capacitance plate body thickness.
Compared with prior art, the utility model has produced following beneficial effect:
Push type capacitance plate of the present utility model is equipped with flexible ITO conductive film, ITO conductive layer and sinking support on the capacitance plate body, can for detection of the touch of the insulators such as similar plastics, satisfy user's user demand.
The utility model will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the more preferably structural representation of embodiment of push type capacitance plate of the present utility model;
Fig. 2 is push type capacitance plate shown in Figure 1 structural representation when being pressed.
Embodiment
As shown in Figure 1, be push type capacitance plate of the present utility model, it comprises capacitance plate body 100, the front and back of described capacitance plate body 100 corresponds to respectively touch side and the non-touch side of capacitance plate body 100; The touch side of described capacitance plate body 100 is provided with flexible ITO conductive film 200, is evenly equipped with sinking support 400 between described flexible ITO conductive film 200 and capacitance plate body 100, and described non-touch side is provided with ITO conductive layer 300; Described flexible ITO conductive film 200 is drawn the positive pole that an electrode goes to connect a power supply (not shown); Described ITO conductive layer 300 is drawn the negative pole that an electrode removes to connect described power supply.
Particularly, described sinking support 400 is rubber bearing.
In order to improve the detection sensitivity of push type capacitance plate, particularly, the air line distance between described flexible ITO conductive film 200 and described ITO conductive layer 300 is no more than the twice of described capacitance plate body 100 thickness.
Below in conjunction with Fig. 2, the principle of work of push type capacitance plate of the present utility model is explained in detail:
As shown in Figure 2, being numbered 110 point shown in arrow on capacitance plate body 100 is positioned under touch point A on flexible ITO conductive film 200, being numbered 120 point shown in arrow on capacitance plate body 100 is positioned under non-touch point B on flexible ITO conductive film 200, if being numbered the electric field intensity of 110 point is E1, being numbered 120 some electric field intensity is E2.And, be numbered 110 point shown in arrow and equal to be numbered shown in arrow 120 point to the air line distance of ITO conductive layer 300 to the air line distance of ITO conductive layer 300.
According to formula E=U/d, U is the electric potential difference of 2, and d is that the distance of 2 can get:
Be numbered the electric field strength E 1=U ˊ/d1 of 120 point; And be numbered the electric field strength E 2=U ˊ/d2 of 110 point, U ˊ is the electric potential difference between flexible ITO conductive film 200 and ITO conductive layer 300, d1 be non-touch point B to the air line distance of ITO conductive layer 300, and d2 is that touch point A is to the air line distance of ITO conductive layer 300.
In the situation that the constant U ˊ that equals of U, because being pressed, touch point A toward lower recess, cause d2 inevitable less than d1, and according to formula E=U/d, the electric field strength E 2 that is numbered 110 point must be greater than the electric field strength E 1 that is numbered 120 point.When power cathode was 0 current potential, the electromotive force that is numbered 110 point on capacitance plate body 100 must be higher than the electromotive force that is numbered 120 point.Therefore, with flexible ITO conductive film 200 as touching the plane, when touching that the plane is pointed or during the contact of the insulator such as similar plastics, must cause the potential change (being that current potential uprises) in the interior respective regions of electric capacity body 100, this variation makes capacitance plate body 100 also produce respective change, make capacitance plate body 100 be equivalent to have original touch ability, thereby realize the location of 100 pairs of touch points of capacitance plate body.
Simultaneously, above-mentioned push type capacitance plate, when the air line distance between described flexible ITO conductive film 200 and described ITO conductive layer 300 is set to be no more than twice big or small of described capacitance plate 100 thickness, can make, make d2 more obvious with respect to the variation of d1, be more conducive to improve the detection sensitivity of capacitance plate body 100.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and the distortion all should belong to the protection domain of the utility model claim within.
Claims (3)
1. push type capacitance plate, it comprises the capacitance plate body, it is characterized in that: the front and back of described capacitance plate body corresponds to respectively touch side and the non-touch side of capacitance plate body; The touch side of described capacitance plate body is provided with flexible ITO conductive film, is evenly equipped with sinking support between described flexible ITO conductive film and capacitance plate body, and described non-touch side is provided with the ITO conductive layer; Described flexible ITO conductive film is drawn the positive pole that an electrode removes to connect a power supply; Described ITO conductive layer is drawn the negative pole that an electrode removes to connect described power supply.
2. push type capacitance plate as claimed in claim 1, it is characterized in that: described sinking support is rubber bearing.
3. push type capacitance plate as claimed in claim 1 or 2, it is characterized in that: the air line distance between described flexible ITO conductive film and described ITO conductive layer is no more than the twice of described capacitance plate body thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220651469 CN202995693U (en) | 2012-11-30 | 2012-11-30 | Push type capacitance screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220651469 CN202995693U (en) | 2012-11-30 | 2012-11-30 | Push type capacitance screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202995693U true CN202995693U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220651469 Expired - Fee Related CN202995693U (en) | 2012-11-30 | 2012-11-30 | Push type capacitance screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202995693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103019487A (en) * | 2012-11-30 | 2013-04-03 | 深圳市深越光电技术有限公司 | Pressing type capacitive screen |
-
2012
- 2012-11-30 CN CN 201220651469 patent/CN202995693U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103019487A (en) * | 2012-11-30 | 2013-04-03 | 深圳市深越光电技术有限公司 | Pressing type capacitive screen |
| CN103019487B (en) * | 2012-11-30 | 2016-01-20 | 深圳市深越光电技术有限公司 | A kind of push type capacitance plate |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20181130 |