CN202600673U - Novel projected capacitive type touch screen - Google Patents
Novel projected capacitive type touch screen Download PDFInfo
- Publication number
- CN202600673U CN202600673U CN 201220246868 CN201220246868U CN202600673U CN 202600673 U CN202600673 U CN 202600673U CN 201220246868 CN201220246868 CN 201220246868 CN 201220246868 U CN201220246868 U CN 201220246868U CN 202600673 U CN202600673 U CN 202600673U
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- CN
- China
- Prior art keywords
- touch screen
- projected capacitive
- electrode strip
- conductive layer
- capacitive 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.)
- Expired - Fee Related
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Abstract
The utility model provides a novel projected capacitive type touch screen comprising a transparent substrate and conducting layers covered on the transparent substrate, wherein the conducting layers comprise electrode strips, and more than two conducting wires connected with an external circuit are connected to each electrode strip; and each electrode strip of an upper-layer conducting layer and a lower-layer conducting layer is separated by insulators at intervals so as to form upright uniform arrangement. By the upright arrangement of each element at intervals, the effect of multi-point contact is realized, the scanning time is greatly shortened, and the signal-to-noise ratio is enhanced, so that the novel projected capacitive type touch screen is accurate in touch and is sensitive in response; and moreover, the qualification rate of the mass production of products is high, and the rejection rate and the cost are low.
Description
[technical field]
The utility model relates to a kind of projection-type touch-screen, and particularly a kind of novel projected capacitive touch screen belongs to the touch screen technology field.
[background technology]
Continuous development along with scientific and technological level; Touch-screen as a kind of simply, interpersonal interactive mode easily; Be widely used in our daily life every field, like mobile phone, media player, navigational system, digital camera, DPF, PDA, game station, display, electrical equipment control, Medical Devices or the like.
Common touch screen technology comprises resistive touch screen and projected capacitive touch screen and the surface capacitance type touch screen that is used for other application, surface acoustic wave touch screen and the infrared touch panel that is applicable to mobile device and consumption electronic product.
Wherein projected capacitive touch screen is because possess the function of multiple point touching, so on consumer-electronics applications, yield unusually brilliant results.Be provided with the conductive layer that is overlying on the base material in the projected capacitive touch screen, conductive layer is generally the ITO conductive layer, is distributed with some electrode strips on the conductive layer.End points at each strip electrode is drawn with lead (can process through plating and printing dual mode), through flexible PCB lead is drawn with the external circuit control chip then to be connected.The row of the internal electrode of projected capacitive touch screen and row, row and row, or the electric capacity that can produce between row and the row.Its principle of work is to touch through staff to have changed the capacitance profile of electrode strip in the touch place, thereby be identified.People's the big minor matter of finger area is certain; Finger touch causes that electric capacity change value also is certain, if internal capacitance is excessive, can cause finger touch after; The capacitance variations that the capacitance variations that causes produces with being interfered is similar, thereby can not normally discern finger touch.So require the inner electric capacity of projected capacitive touch screen more little good more, the ratio of the electric capacity change value that causes after the finger touch like this and the value of former electric capacity is just big more.The big more representative signal to noise ratio (S/N ratio) of ratio is big more, and is also just more accurate to the judgement of touch location.The size of this electric capacity depends on the resistance size of internal electrode bar.The electrode strip resistance is big more, and the electric capacity of generation is big more.In addition because the working method of projected capacitive touch screen through control chip be line by line/column scan, every scanning one strip electrode all comes work through charging, discharge.Electric capacity is big more, and the charge and discharge time that needs so will be long more.
Conductive layer will be overlying on the base material, and the base material of general projected capacitive touch screen all is a glass, projected capacitive touch screen commonly used in the market then; Mostly its ITO figure is square or rhombus; Event user finger makes that the face resistance of projected capacitive touch screen is bigger, because of the face of making projected capacitive touch screen hinders to be advisable below 150 ohm when touching; So cause the touch weak effect of projected capacitive touch screen, and its scrappage is high.
So be necessary to design these defectives that a new projected capacitive touch screen remedies prior art.
[utility model content]
The purpose of the utility model is to address the above problem; And a kind of novel projected capacitive touch screen is provided, and realize the effect of multiple point touching, can shorten sweep time greatly, improve signal to noise ratio (S/N ratio); Make it to touch accurately, be quick on the draw, and the volume production yield of product is high, scrappage and cost are low.
In order to achieve the above object; The utility model provides a kind of novel projected capacitive touch screen; Comprise transparency carrier and be overlying on the conductive layer on the said transparency carrier, said conductive layer comprises electrode strip, is connected with the lead that is connected with external circuit more than two on the every said electrode strip; Each electrode strip of levels conductive layer is partitioned into vertically evenly distributed by insulator.
Each electrode strip of the levels conductive layer that mutually combines through above-mentioned each element is partitioned into vertically evenly distributed by insulator, realized the effect of multiple spot contact, shortens sweep time greatly, improves signal to noise ratio (S/N ratio), makes it to touch accurately, is quick on the draw; And the volume production yield of product height, scrappage and cost are low.
[description of drawings]
Fig. 1 is a kind of novel projected capacitive touch screen structural representation of the utility model.
[embodiment]
Below in conjunction with accompanying drawing the utility model is further described.
As shown in Figure 1, a kind of projected capacitive touch screen 1 comprises transparency carrier and is overlying on the conductive layer 2 on the said transparency carrier that said conductive layer 2 comprises electrode strip 2.1, is connected with the lead that is connected with external circuit more than two on the every said electrode strip 2.1; Each electrode strip of levels conductive layer is partitioned into vertically evenly distributed by insulator.Levels electrode strip number depends primarily on screen size, and screen is big more, and the electrode strip number that needs is many more.In addition, said conductive layer is provided with the touch sensible parts, and said conductive layer is the ITO conductive layer.Each electrode strip that said touch sensible parts are the levels conductive layer is partitioned into vertically evenly distributed by insulator, realized the effect of multiple spot contact, shortens sweep time greatly, improves signal to noise ratio (S/N ratio), makes it to touch accurately, is quick on the draw; And the volume production yield of product height, scrappage and cost are low.
A kind of novel projected capacitive touch screen of the utility model is compared with existing touch-screen; Have following advantage: each electrode strip that said touch sensible parts are the levels conductive layer is partitioned into vertically evenly distributed by insulator; Realize the effect of multiple point touching; Can shorten sweep time greatly, improve signal to noise ratio (S/N ratio), make it to touch accurately, be quick on the draw, and the volume production yield of product height, scrappage and cost are low.
Embodiment only is the preferred optimum implementation of the utility model in sum; Unintelligible is that the protection domain of the utility model is limited; For adjustment that does not exceed the utility model technical scheme and the change that the technical work personnel in this field do according to present embodiment, should think and drop in the protection domain of the utility model.
Claims (1)
1. novel projected capacitive touch screen, it is characterized in that: comprise transparency carrier and be overlying on the conductive layer on the said transparency carrier, said conductive layer comprises electrode strip, is connected with the lead that is connected with external circuit more than two on the every said electrode strip; Each electrode strip of levels conductive layer is partitioned into vertically evenly distributed by insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220246868 CN202600673U (en) | 2012-05-25 | 2012-05-25 | Novel projected capacitive type touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220246868 CN202600673U (en) | 2012-05-25 | 2012-05-25 | Novel projected capacitive type touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202600673U true CN202600673U (en) | 2012-12-12 |
Family
ID=47318197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220246868 Expired - Fee Related CN202600673U (en) | 2012-05-25 | 2012-05-25 | Novel projected capacitive type touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202600673U (en) |
-
2012
- 2012-05-25 CN CN 201220246868 patent/CN202600673U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen contact Electronics Co., Ltd. Assignor: Zhang Rengui Contract record no.: 2014440020424 Denomination of utility model: Novel projected capacitive type touch screen Granted publication date: 20121212 License type: Exclusive License Record date: 20141216 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20150525 |
|
| EXPY | Termination of patent right or utility model |