CN202404560U - Capacitive touch screen - Google Patents
Capacitive touch screen Download PDFInfo
- Publication number
- CN202404560U CN202404560U CN2011205563902U CN201120556390U CN202404560U CN 202404560 U CN202404560 U CN 202404560U CN 2011205563902 U CN2011205563902 U CN 2011205563902U CN 201120556390 U CN201120556390 U CN 201120556390U CN 202404560 U CN202404560 U CN 202404560U
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- drive electrode
- capacitance type
- type touch
- control screen
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Abstract
The utility model provides a capacitive touch screen. The capacitive touch screen comprises a substrate and a conductive layer which are superposed; the conductive layer comprises driving electrodes and inductive electrodes which are mutually crossed; and the driving electrodes and the inductive electrodes form a comb-shaped structure and are mutually electrically insulated and crossed. The single conductive layer is adopted in the capacitive touch screen, so that the electrode structure is simplified, a bridging design is avoided, and the cost is reduced. Meanwhile, the electrodes form the comb-shaped structure, so that the signal-to-noise ratio is improved. Because the resistance of the electrodes is reduced, the capacitance is reduced, the charging/ discharging time is shortened, the touch sensitivity is improved, and the manufacturing difficulty is reduced.
Description
Technical field
The utility model relates to a kind of capacitance type touch control screen.
Background technology
Along with progress of science and technology, contact panel is by being applied in the various electronic installation more and more widely.
Common touch technology comprises resistance type touch control screen, the projection-type touch screen that applies to mobile electronic device and consumer-elcetronics devices and the surface capacitance type touch screen that is used for other application, surface acoustic wave type touch screen and infrared touch control screen.Wherein realize the multi-point touch function, and on consumption electronic products are used, yield unusually brilliant results because the projection-type touch screen has.
The projected capacitive touch screen comprises two conductive layers that are overlying on substrate surface, and conductive layer is generally the transparent indium tin oxide film.The superimposed setting of said two conductive layers.Each electrode layer comprises a plurality of electrode strips.In said two conductive layers, wherein one deck is a row matrix, and another layer is a column matrix.Each electrode strip end points draw with lead, through flexible PCB lead is drawn with the external drive circuit chip then and is connected.Between the row and row of projected capacitive touch screen internal electrode, between row and the row, can produce electric capacity between row and the row.
When staff was touched said capacitance touch control screen, staff touched and has changed the capacitance profile of electrode strip in touching place, thereby is identified.People's finger area size is certain, and the capacitance variations that finger touches causes also is certain.If internal capacitance is excessive, can cause finger touch after, the capacitance variations that the capacitance variations that causes is produced with disturbing is similar, thereby causes erroneous judgement disconnected.So it is more little good more that the inner electric capacity of projected capacitive touch screen need be set, capacitance variations value that causes behind the staff touch-control like this and former changes in capacitance value ratio are big more.The big more representative signal to noise ratio (S/N ratio) of ratio is big more, and is then more accurate to the judgement of position of touch.The electrode strip resistance is big more, and the electric capacity that then produces is big more, and electric capacity is big more, and the time that same correspondence discharges and recharges is also long more, causes touch-control insensitive.
Change electrode strip size of industry, but electrode strip is more little, and its corresponding contact conductor is intensive more, brings the complexity of manufacturing process thus.
To the problems referred to above, the utility model then provides a kind of new capacitance type touch control screen in order to improve or to solve the above problems.
The utility model content
Sweep time to prior art projected capacitive touch screen is long; Signal to noise ratio (S/N ratio) is not high and react insensitive, the technical matters of being inconvenient to process, and the utility model provides a kind of shortening sweep time; Improve signal to noise ratio (S/N ratio), touch accurate and sensitive capacitance type touch control screen.
A kind of capacitance type touch control screen, it comprises the substrate and the conductive layer of superimposed setting, and said conductive layer comprises drive electrode and induction electrode arranged in a crossed manner each other, and said drive electrode and induction electrode are comb shaped structure, and electric insulation is arranged in a crossed manner each other.
Further improvement as above-mentioned capacitance type touch control screen; Said drive electrode comprises the drive motor branch that a plurality of intervals are provided with; Said induction electrode comprises the induction electrode branch that a plurality of intervals are provided with; Said a plurality of drive electrode branch is connected in series setting each other, and said a plurality of induction electrodes are connected in series setting each other.
Further improvement as above-mentioned capacitance type touch control screen; Said substrate is a glass substrate; Said conductive layer is a transparency conducting layer, and it is arranged on a side surface of said substrate, and said conductive layer region forms the touch-control sensing district; The peripheral wiring region that forms of said conductive layer, it is peripheral that said wiring region is positioned at said touch-control sensing district.
Further improvement as above-mentioned capacitance type touch control screen; Said drive electrode and said induction electrode cross-distribution are in said touch-control sensing district; Said drive electrode comprises a plurality of drive electrode branch; Said induction electrode comprises a plurality of induction electrode branch, a drive electrode branch arranged in a crossed manner between the per two adjacent induction electrode branches, an induction electrode branch arranged in a crossed manner between the per two adjacent drive electrode branches.
As the further improvement of above-mentioned capacitance type touch control screen, said touch-control sensing district also comprises a plurality of electrode filling blocks, and said electrode filling block is located at the interstitial site between said induction electrode branch and the said drive electrode branch.
As the further improvement of above-mentioned capacitance type touch control screen, the end of said induction electrode extends to said wiring region, and the end of said drive electrode extends to said wiring region equally.
As the further improvement of above-mentioned capacitance type touch control screen, said capacitance type touch control screen also comprises at least one chip for driving, said chip for driving and the corresponding electrical connection of said drive electrode and said induction electrode.
As the further improvement of above-mentioned capacitance type touch control screen, said capacitance type touch control screen also comprises the ground-electrode line, and said ground-electrode line is said drive electrode and said induction electrode at interval, and corresponding electrical connection with said chip for driving
Compared with prior art, adopt single conductive layer, simplify electrode structure, avoid the design of putting up a bridge, reduce cost.Simultaneously, it is comb shaped structure that electrode is set, and helps at substrate surface electrode being set, and improves signal to noise ratio (S/N ratio), because the electrode resistance reduces, then electric capacity diminishes, and makes the time that discharges and recharges shorten thus, improves touch-control sensitivity, has also reduced manufacture difficulty.
Description of drawings
Fig. 1 is the schematic perspective view of the utility model capacitance type touch control screen.
Fig. 2 is the floor map of conductive layer shown in Figure 1.
Embodiment
Specify the embodiment of the utility model below in conjunction with accompanying drawing.
Seeing also Fig. 1, is the schematic perspective view of the capacitive touch screen that disclosed of a kind of preferred embodiments of the utility model.Said capacitance type touch control screen 2 comprises a substrate 20, a conductive layer 23 and an insulating protective layer (figure does not show).
Said substrate 20 is glass substrates, and its whole rectangular structure in order to carrying said conductive layer 23 and said insulating protective layer, and then forms touch-control sensing district 21 and wiring region 22.Said touch-control sensing district 21 is positioned at the zone line of said substrate 20, and said wiring region 22 is positioned at the periphery in said touch-control sensing district 21, and said insulating protective layer covers said wiring region 22.
Said conductive layer 23 is transparent conductive patterns layers, and it can be an indium tin oxide films, can also be transparency conducting layers such as tellurium oxide tin.This conductive layer 23 comprises drive electrode 231 and induction electrode 233.Said drive electrode 231 and said induction electrode 233 all are comb shaped structure.Said drive electrode 231 comprises a plurality of drive electrode branch 232, and said induction electrode comprises a plurality of induction electrode branch 234.Please combine to consult Fig. 2 again, be the planar structure synoptic diagram of conductive layer 23 shown in Figure 1.In Fig. 2, the two adjacent sides of setting said substrate 20 are respectively X-direction and Y direction, and then X-direction defines an XY plane perpendicular to Y direction by X-direction and Y direction.Along being parallel to X-direction, the width of said drive electrode branch 232 dwindles gradually, and the said relatively induction electrode of its hypotenuse branch 234 is provided with.Equally, along being parallel to X-direction, the width of said induction electrode branch 234 increases gradually, and the hypotenuse of the hypotenuse of said induction electrode branch 234 and said drive electrode branch 232 is relative.Along being parallel to Y direction; Said drive electrode branch 232 is crisscross arranged with said induction electrode branch 234 spaces; That is to say; An induction electrode branch 234 arranged in a crossed manner between the per two adjacent drive electrode branches 232, a drive electrode branch 232 arranged in a crossed manner between the per two adjacent induction electrode branches 234.And set interval between the per two adjacent drive electrode branches 232 between between the 2.0mm to 7.0mm.Equally, the spacing between the per two adjacent induction electrode branches 234 is also between between the 2.0mm to 7.0mm.Simultaneously, because said drive electrode branch 232 is provided with said induction electrode branch 234 spaces, the interval between per two adjacent induction electrode branches 234 and the adjacent driven electrode branches 232 is less than or equal to 1.0mm.
Please consult Fig. 1 and Fig. 2 more simultaneously; In said wiring region 22; Be equipped with drive electrode line 236, induced electricity polar curve 238, ground-electrode line 235 and be positioned at the outside chip for driving 237 of substrate, said insulating protective layer covers said drive electrode line 236, induced electricity polar curve 238, ground-electrode line 235 and chip for driving 237.Said drive electrode line 236 1 ends are electrically connected to the end of said drive electrode 231, and the other end is electrically connected to said chip for driving 237.These induced electricity polar curve 238 1 ends are electrically connected to the end of said induction electrode 233, and the other end is electrically connected to said chip for driving 237 equally.Two relative sides 201,202 that said drive electrode line 236 and said induced electricity polar curve 238 close on said substrate 20 respectively are provided with; That is; Said drive electrode line 231 is provided with near said drive electrode 231 sides 201; Said induction electrode 233 is provided with near said induction electrode side 202, and extends to the 3rd side 203 of said substrate 20, and said ground-electrode line 235 closes on said side 203 and is provided with.Said ground-electrode line 235 is said drive electrode line 236 and said induced electricity polar curve 238 at interval, that is to say that said ground-electrode line 235 is located between said drive electrode line 236 and the said induced electricity polar curve 238, and is electrically connected to said chip for driving 237.
When said capacitance type touch control screen 2 is worked; It touches a certain zone in the touch-control sensing district 21 of said touch screen 2 by a foreign object, at this moment, forms coupling capacitance between user and the position of touch; Thereby and change this regional equivalent capacity; Wherein the variation of current value is relevant with the contact area of finger, and user's the scope that finger touched comprises at least one induction electrode branch 232 and at least one drive electrode branch 234, thereby the electric capacity that causes the touching zone changes.Said drive electrode line 236 and said induced electricity polar curve 238 transmit this capacitance variations to said chip for driving 237 respectively; The capacitance variations of said chip for driving 237 said drive electrodes 231 of induction and said induction electrode 233; Judge thus by the regional position of touching, realize touch-control sensing.
As the further improvement of above-mentioned embodiment, between said drive electrode 231 and said induction electrode 233, be folded with filling block, when the said conductive layer 23 of processing, the existence of said filling block further improves the interference free performance of said capacitance type touch control screen.The more important thing is that when in hot pressing and technology, the heat pressing process that exists for of said filling block is provided convenience, and improves its bonding fiduciary level.
Further improvement as above-mentioned embodiment; Between said drive electrode line 236 and said induced electricity polar curve 238; And said ground-electrode line is folded with filling block equally; When the said conductive layer 23 of processing, the existence of said filling block further improves the interference free performance of said capacitance type touch control screen.The more important thing is that when in hot pressing and technology, the heat pressing process that exists for of said filling block is provided convenience, and improves its bonding fiduciary level.
The above is merely the preferred embodiments of the utility model; The protection domain of the utility model does not exceed with above-mentioned embodiment; As long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection domain of putting down in writing in claims.
Claims (8)
1. capacitance type touch control screen; It comprises: the substrate of superimposed setting and conductive layer; Said conductive layer comprises drive electrode and induction electrode arranged in a crossed manner each other, and it is characterized in that: said drive electrode and induction electrode are comb shaped structure, and electric insulation is arranged in a crossed manner each other.
2. capacitance type touch control screen according to claim 1; It is characterized in that: said drive electrode comprises the drive motor branch that a plurality of intervals are provided with; Said induction electrode comprises the induction electrode branch that a plurality of intervals are provided with; Said a plurality of drive electrode branch is connected in series setting each other, and said a plurality of induction electrodes are connected in series setting each other.
3. capacitance type touch control screen according to claim 1; It is characterized in that: said substrate is a glass substrate; Said conductive layer is a transparency conducting layer, and it is arranged on a side surface of said substrate, and said conductive layer region forms the touch-control sensing district; The peripheral wiring region that forms of said conductive layer, it is peripheral that said wiring region is positioned at said touch-control sensing district.
4. capacitance type touch control screen according to claim 3; It is characterized in that: said drive electrode and said induction electrode cross-distribution are in said touch-control sensing district; Said drive electrode comprises a plurality of drive electrode branch; Said induction electrode comprises a plurality of induction electrode branch, a drive electrode branch arranged in a crossed manner between the per two adjacent induction electrode branches, an induction electrode branch arranged in a crossed manner between the per two adjacent drive electrode branches.
5. capacitance type touch control screen according to claim 4 is characterized in that: said touch-control sensing district also comprises a plurality of electrode filling blocks, and said electrode filling block is located at the interstitial site between said induction electrode branch and the said drive electrode branch.
6. capacitance type touch control screen according to claim 5 is characterized in that: the end of said induction electrode extends to said wiring region, and the end of said drive electrode extends to said wiring region equally.
7. capacitance type touch control screen according to claim 6 is characterized in that: said capacitance type touch control screen also comprises at least one chip for driving, said chip for driving and the corresponding electrical connection of said drive electrode and said induction electrode.
8. capacitance type touch control screen according to claim 7 is characterized in that: said capacitance type touch control screen also comprises the ground-electrode line, and said ground-electrode line is said drive electrode and said induction electrode at interval, and corresponding electrical connection with said chip for driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205563902U CN202404560U (en) | 2011-12-27 | 2011-12-27 | Capacitive touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205563902U CN202404560U (en) | 2011-12-27 | 2011-12-27 | Capacitive touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202404560U true CN202404560U (en) | 2012-08-29 |
Family
ID=46702195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205563902U Expired - Lifetime CN202404560U (en) | 2011-12-27 | 2011-12-27 | Capacitive touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202404560U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111760A (en) * | 2013-04-22 | 2014-10-22 | 深圳富泰宏精密工业有限公司 | Dual-mode touch input device and touch panel |
| WO2016192642A1 (en) * | 2015-06-01 | 2016-12-08 | 珠海市魅族科技有限公司 | Key device manipulation and control method, key device and terminal |
-
2011
- 2011-12-27 CN CN2011205563902U patent/CN202404560U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111760A (en) * | 2013-04-22 | 2014-10-22 | 深圳富泰宏精密工业有限公司 | Dual-mode touch input device and touch panel |
| CN104111760B (en) * | 2013-04-22 | 2017-03-22 | 深圳富泰宏精密工业有限公司 | Dual-mode touch input device and touch panel |
| WO2016192642A1 (en) * | 2015-06-01 | 2016-12-08 | 珠海市魅族科技有限公司 | Key device manipulation and control method, key device and terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120829 |
|
| CX01 | Expiry of patent term |