CN202306518U - Capacitive touch screen - Google Patents
Capacitive touch screen Download PDFInfo
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- CN202306518U CN202306518U CN2011203409498U CN201120340949U CN202306518U CN 202306518 U CN202306518 U CN 202306518U CN 2011203409498 U CN2011203409498 U CN 2011203409498U CN 201120340949 U CN201120340949 U CN 201120340949U CN 202306518 U CN202306518 U CN 202306518U
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- capacitive touch
- touch screen
- sensing layer
- glass
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Abstract
The utility model discloses a capacitive touch screen, and aims to provide a capacitive touch screen with higher sensitivity. The capacitive touch screen comprises an indium tin oxide (ITO) sensing layer, wherein the ITO sensing layer comprises glass and ITO arranged on the glass and is provided with a window area; and an electrically conductive metal layer used for reducing impedance is further arranged on the ITO in the window area. The utility model can be used on various capacitive touch screens.
Description
Technical field
The utility model relates to touch-screen, especially relates to a kind of capacitive touch screen.
Background technology
Because touch-screen has realized that the user with pointing the function of on screen, controlling main frame, makes man-machine interaction more simple and direct, thereby receives widespread use.Touch-screen comprises resistive touch screen and capacitive touch screen.Wherein:
The concrete structure of capacitive touch screen is as shown in Figure 3; It comprises display screen 81, ITO (nano indium tin metal oxide) sensing layer 82, is coated in the OCA (Optical Clear Adhesive, optical cement) 83 of ITO sensing layer upper and lower surface, is located at the superiors and cover plate 84 that is used to protect and the IC 85 that is connected with the ITO sensing layer.ITO sensing layer 82 comprises glass and is located at ITO on glass.Capacitive touch screen utilizes people's bulk electric field; When finger touch; ITO and human finger form a coupling capacitance, and the electric current that four limit electrodes send can flow to the contact, are directly proportional with the distance of pointing electrode and electric current is strong and weak; IC just can calculate the ratio and the power of electric current, accurately calculates touch point position.But,, cause the touch sensitivity of capacitive touch screen lower because the impedance of existing ITO is higher.
The utility model content
The utility model is higher for the impedance of the ITO that solves the prior art capacitive touch screen, causes the lower technical matters of touch sensitivity of capacitive touch screen, and a kind of capacitive touch screen is provided.
For solving the problems of the technologies described above; The technical scheme that the utility model adopts is a kind of capacitive touch screen of design; Comprise the ITO sensing layer; Said ITO sensing layer comprises glass and is located at ITO on glass, and said ITO sensing layer has a viewfinder area, also is provided with the metal level of the conduction that is used to reduce impedance on the ITO in the said viewfinder area.
Said metal level is a molybdenum aluminium molybdenum.
Said metal level is a copper.
Said ITO is arranged on the upper and lower surface of glass, and wherein the one side the ITO horizontally set, the ITO of another side vertically is provided with.
The utility model is through being provided with metal level on the ITO in the viewfinder area of existing capacitive touch screen, thereby can reduce the impedance when touching, and makes that the sensitivity of capacitive touch screen is higher.
Description of drawings
Below in conjunction with embodiment and accompanying drawing the utility model is elaborated, wherein:
Fig. 1 is the ITO cross direction profiles structural representation of the ITO sensing layer of the utility model capacitive touch screen;
Fig. 2 is the vertical distributed architecture synoptic diagram of ITO of the ITO sensing layer of the utility model capacitive touch screen;
Fig. 3 is the structural representation of prior art capacitive touch screen.
Embodiment
The utility model capacitive touch screen mainly is the purpose that reaches raising sensitivity through the impedance of the ITO that reduces the prior art capacitive touch screen.The utility model capacitive touch screen is the same with the prior art capacitive touch screen; Include display screen, ITO (nano indium tin metal oxide) sensing layer, be coated in ITO sensing layer upper and lower surface OCA (Optical Clear Adhesive, optical cement), be located at the superiors and cover plate that is used to protect and the IC that is connected with the ITO sensing layer.The difference of itself and prior art capacitive touch screen is the structure of the ITO sensing layer in the viewfinder area (VA district).
The ITO sensing layer of the utility model capacitive touch screen can be two-sided ITO structure, also can be single face ITO structure.See also Fig. 1 and Fig. 2.ITO sensing layer 1 comprises glass 11 and is located at ITO12 on glass.When the ITO sensing layer was two-sided ITO structure, promptly ITO was arranged on the upper and lower surface of glass.Then Fig. 1 and Fig. 2 represent the distribution of ITO at the glass upper and lower surface respectively.Wherein, among Fig. 1, ITO 12 is horizontally installed on the upper surface of glass, and among Fig. 2, ITO 12 vertically is arranged on the lower surface of glass.Be provided with the metal level 13 of the conduction that is used to reduce impedance at ITO 12.Metal level can be molybdenum aluminium molybdenum or copper.Because the metal level setting makes the impedance of ITO reduce, the sensitivity of capacitive touch screen is higher, and resolution is higher.The ITO sensing layer comprises viewfinder area 2, but viewfinder area 2 is the viewing area of capacitive touch screen, also is provided with metal level on the ITO in the viewfinder area 2.
When the ITO sensing layer was monolithic ITO structure, promptly ITO was distributed in the single face of glass, and ITO both can cross direction profiles as shown in Figure 1 in distribution on glass, also can be like the said vertical distribution of Fig. 2.On ITO 12, be provided with the metal level 13 of the conduction that is used to reduce impedance equally.Metal level can be molybdenum aluminium molybdenum or copper.The ITO sensing layer comprises viewfinder area 2 equally, and shown in dotted portion among the figure, but viewfinder area 2 is the viewing area of capacitive touch screen, also is provided with metal level on the ITO in the viewfinder area 2.
The utility model is through being provided with metal level on the ITO in existing capacitive touch screen viewfinder area (VA district), thereby the impedance can reduce touch the time makes that the sensitivity of capacitive touch screen is higher, and resolution is higher.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (4)
1. capacitive touch screen; Comprise the ITO sensing layer; Said ITO sensing layer comprises glass and is located at ITO on glass that said ITO sensing layer has a viewfinder area, it is characterized in that: the metal level that also is provided with the conduction that is used to reduce impedance on the ITO in the said viewfinder area.
2. capacitive touch screen according to claim 1 is characterized in that: said metal level is a molybdenum aluminium molybdenum.
3. capacitive touch screen according to claim 1 is characterized in that: said metal level is a copper.
4. capacitive touch screen according to claim 1 is characterized in that: said ITO is arranged on the upper and lower surface of glass, and wherein the one side the ITO horizontally set, the ITO of another side vertically is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203409498U CN202306518U (en) | 2011-09-13 | 2011-09-13 | Capacitive touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203409498U CN202306518U (en) | 2011-09-13 | 2011-09-13 | Capacitive touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202306518U true CN202306518U (en) | 2012-07-04 |
Family
ID=46375371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203409498U Expired - Fee Related CN202306518U (en) | 2011-09-13 | 2011-09-13 | Capacitive touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202306518U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102968233A (en) * | 2012-11-27 | 2013-03-13 | 南昌欧菲光科技有限公司 | Capacitive touch screen with metal wire grid array |
| CN103677359A (en) * | 2012-09-06 | 2014-03-26 | 宸鸿科技(厦门)有限公司 | Touch panel and touch screen structure and touch display equipment thereof |
-
2011
- 2011-09-13 CN CN2011203409498U patent/CN202306518U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103677359A (en) * | 2012-09-06 | 2014-03-26 | 宸鸿科技(厦门)有限公司 | Touch panel and touch screen structure and touch display equipment thereof |
| CN102968233A (en) * | 2012-11-27 | 2013-03-13 | 南昌欧菲光科技有限公司 | Capacitive touch screen with metal wire grid array |
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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: 20120704 Termination date: 20140913 |
|
| EXPY | Termination of patent right or utility model |