CN201402457Y - Mutual capacitance type touch screen - Google Patents
Mutual capacitance type touch screen Download PDFInfo
- Publication number
- CN201402457Y CN201402457Y CN2009201360371U CN200920136037U CN201402457Y CN 201402457 Y CN201402457 Y CN 201402457Y CN 2009201360371 U CN2009201360371 U CN 2009201360371U CN 200920136037 U CN200920136037 U CN 200920136037U CN 201402457 Y CN201402457 Y CN 201402457Y
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- Prior art keywords
- touch
- screen
- capacitive sensing
- tempered glass
- mutual capacitance
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- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000010408 film Substances 0.000 claims description 17
- 239000005341 toughened glass Substances 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 108010010803 Gelatin Proteins 0.000 claims description 4
- 229920000159 gelatin Polymers 0.000 claims description 4
- 239000008273 gelatin Substances 0.000 claims description 4
- 235000019322 gelatine Nutrition 0.000 claims description 4
- 235000011852 gelatine desserts Nutrition 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000005342 ion exchange Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000011368 organic material Substances 0.000 claims description 2
- 239000005361 soda-lime glass Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 239000010409 thin film Substances 0.000 claims description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims 2
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 230000006698 induction Effects 0.000 abstract 4
- 239000006058 strengthened glass Substances 0.000 abstract 3
- 239000000853 adhesive Substances 0.000 abstract 2
- 230000001070 adhesive effect Effects 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012905 input function Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
- -1 therefore Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
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- Position Input By Displaying (AREA)
Abstract
The utility model discloses a mutual capacitance type touch screen which comprises strengthened glass, a capacitance induction composite structure and optical transparent adhesive, wherein the lower surface of the non-window region of the strengthened glass is a color decorative film, the capacitance induction composite structure is composed of optical transparent base material, a capacitance induction unit and a conductive lead, finally the strengthened glass and the capacitance induction composite structure can be attached by the optical transparent adhesive to form the touch screen. The touch screen can realize the function of multi-point touch control through the mutual capacitance type.
Description
Technical field
The utility model is mainly used in the touch-screen of various electronic equipments, especially handset touch panel.
Background technology
Touch-screen is a kind of remarkable input equipment that improves man machine operation interface, have intuitively, simply, advantage efficiently.Touch-screen has obtained to use widely in many electronic products, such as mobile phone, PDA, multimedia, public information inquiry system etc.In the past, various types of touch-screens constantly occur, and comprise resistance-type, condenser type, infrared and surface acoustic wave type touch-screen.
Generally, capacitive touch screen is to utilize a nesa coating in the touch-screen as the utmost point of electric capacity, the finger of human body is as another utmost point of electric capacity, and when pointing approaching or contacting touch screen surface, finger is coupled with touch-screen, form a new electric capacity, the position coordinates of the controller of touch-screen by measuring changes in capacitance and calculate contact point (X, Y), final, (X Y) explains and carries out events corresponding to the position coordinates that main frame provides according to controller.Past, because structure and drive the restriction of cost, and many-sided shortcoming such as touch-control distortion, the utilization scope of capacitive touch screen is very narrow, and resistive touch screen is to use the most general touch screen technology in the market.Resistive touch screen is that a kind of contact that utilizes the pressure effect to cause upper and lower conductive layer causes the electric signal of system to change realizing input function.In the recent period, owing to updating of structure and signal processing technology, capacitive touch screen rises gradually.In these novel capacitive touch screens, because removed the flexible conductive film and the labyrinth of resistance screen, adopted different touch control manners, show better performance, such as, do not have the mechanical motion wear problem in the screen, even and simple in structure, transmittance is high, the linearity good, dustproof, fire prevention, scratch resistantly also have a stable performance etc. in worst environment.The advantage on the other hand of capacitive touch screen is that it can realize the multi-point touch function, and promptly the user can carry out multiple point touching signal input simultaneously by it, realizes that multiple spot operates simultaneously finishing specific action, such as amplify, dwindle, the function of rotation etc.
But, mostly present capacitive touch screen is to adopt the self-capacitance mode to realize the touch signal input, and its multi-point touch function is to change according to gesture to realize, has " terrible point " phenomenon, can not really explain the absolute coordinates of multiple spot position, thereby influence the real realization of multi-point touch function.
The utility model content
The purpose of this utility model is to provide a kind of mutual capacitance type touch-screen, solves existing self-capacitance formula and touches the problem that the multi-point touch technology exists, and can provide touch-screen to touch the absolute coordinates of multiple spot position simultaneously, truly realizes multi-point touch.
To achieve these goals, the utility model has adopted following technical scheme:
Mutual capacitance type touch-screen of the present utility model is made up of tempered glass, optical lens gelatin and capacitive sensing composite structure.Tempered glass has explosion-proof performance, can protect the capacitive sensing composite structure below it; Adopt physical vaccum deposite and screen printing technique, prepared the color film at the non-viewfinder area lower surface of tempered glass, therefore, tempered glass also has decoration function.The capacitive sensing composite structure is the core of mutual capacitance type touch-screen, and it comprises the capacitive sensing unit and the conducting wire of optical clear base material, substrate surface.The capacitive sensing unit is made up of the rhombus nesa coating that is matrix distribution, and these conducting films are divided into vertical conduction connection and are connected with transverse conductance, use X-axis coordinate and Y-axis coordinate representation respectively.The capacitive sensing unit of X-axis coordinate and the capacitive sensing unit of Y-axis coordinate can be positioned at same plane, also can be in different plane, if in the isoplanar, their intersections then are insulated separately.The conducting wire is made up of many groups lead, and they are the above-mentioned capacitive sensing unit vertical and that laterally connected of separate connection respectively.At last, tempered glass and capacitive sensing composite structure are closed formation mutual capacitance type touch-screen of the present utility model by the optical clear sticker.
Principle of work of the present utility model is: the capacitive sensing unit becomes matrix distribution, and longitudinal and transverse connection respectively, represents X-axis and Y-axis coordinate.Before the finger contact, there are mutual capacitance (C in the capacitive sensing unit of finger touch position and the capacitive sensing unit around it
P), when finger contact touch-screen, produce new electric capacity (C
F), the mutual capacitance of this capacitive sensing unit and its environmental capacitance sensing unit is changed, the controller of touch-screen is by measuring capacitance variations, the absolute coordinates of a certain touch location of full confirmation, because the capacitive sensing unit of different X-axis or Y-axis all is by the independent controller that directly connects in conducting wire, therefore when touch screen surface exists or multi-point touch panel at 2, but their absolute coordinates perfect representation all, realization multi-point touch function.
Description of drawings
There are two touch points in Fig. 1 (a) for the surface of touch-screen; When (b) having two touch points, supervene " terrible point " phenomenon for the surface of self-capacitance formula touch-screen.
Fig. 2 is a structural representation of the present utility model.
Fig. 3 is the cut-open view of tempered glass.
Fig. 4 is the structural drawing of capacitive sensing composite structure.
Fig. 5 (a) is when pointing not touch-screen, the mutual capacitance (C that the sensing unit of touch-screen exists
P); (b) be the cut-open view of figure (a) along AA.
When Fig. 6 is finger touch, increase electric capacity (C
F).
Embodiment
Below in conjunction with specification drawings and specific embodiments the utility model is described further, but the scope that the utility model is protected is not limited thereto.
There is " terrible point " phenomenon in existing self-capacitance formula touch-screen, can not really explain the absolute coordinates of multiple spot position, and its multi-point touch function is to change according to gesture to realize.Suppose under certain instantaneous state, there are two touch points (7) (8) shown in Fig. 1 (a) in the surface of touch-screen (6), and existing self-capacitance formula touch-screen can't judge that the touch point is from actual touch point (7) (8) point or the point (9) (10) shown in Fig. 1 (b).Point (9) (10) is touch point (7) (8) " terrible point ", and along with the increase of actual touch point, " terrible point " number will be the quadratic function form to be increased, and this greatly influences the real realization of multi-point touch function.
Fig. 2 is a mutual touch screen structure synoptic diagram of the present utility model.The mutual capacitance type touch-screen comprises tempered glass (1), optical lens gelatin (2) and capacitive sensing composite structure (3).The material of tempered glass (1) is a soda-lime-silica glass, and its thickness range is 0.3～3mm, preferably less than 1mm, and through the chemical enhanced processing of ion-exchange.Tempered glass (1) is divided into viewfinder area (4) and non-viewfinder area (5).See through viewfinder area (4) and can observe the beneath display screen of touch-screen.By physical vaccum deposite and screen printing technique, prepare layer of metal film (11) and one deck color film (12) at non-viewfinder area (5) lower surface of tempered glass, as shown in Figure 3.Metallic film (11) has reflection function, can strengthen the decorative effect of color film.This metallic film (11) also has shielding action, weakens the capacitive coupling of non-viewfinder area (10) when touching.This metal film is Ni, Cr or other metal and alloy material.In actual fabrication, non-viewfinder area (5) lower surface of tempered glass can not have metallic film (11), and has only color film (12).Fig. 4 is the structural drawing of capacitive sensing composite structure (3), and it comprises the rhombus electrically conducting transparent sensing unit (14) and the conducting wire that is connected them (15) on optical clear base material (13), optical clear base material (13) surface.Optical clear base material (13) can be glass or optical clear organic material, such as PET, PC etc.Rhombus electrically conducting transparent sensing unit (14) is respectively horizontal connection (141) and vertically is connected (142), and its material is that ito thin film or ZnO mix the Al film.The rhombus electrically conducting transparent sensing unit (141) (142) that laterally connects and vertically is connected can be in same plane, also can each plane of leisure in, if in same plane, their intersection is insulated to separate.Laterally connect and the controller of the rhombus electrically conducting transparent sensing unit (141) (142) that vertically is connected by conducting wire (15) difference separate connection touch-screen.At last, tempered glass (2) and capacitive sensing composite structure (3) are fitted by optical lens gelatin (2), form mutual capacitance type touch-screen of the present utility model.
When pointing (15) when not contacting touch-screen, there is mutual capacitance (C in the sensing unit (14) in the capacitive sensing composite structure (3) with its sensing unit (14) on every side
P), shown in Fig. 5 (a).Fig. 5 (b) is the sectional view of Fig. 4 (a) along AA.When finger (15) contacts the viewfinder area (9) of tempered glass (1), produce new electric capacity (C
F), shown in Fig. 5 (b), the mutual capacitance of this capacitive sensing unit and its environmental capacitance sensing unit is changed, controller is by measuring capacitance variations, and any coordinate position of full confirmation is because the capacitive sensing unit of different X-axis or Y-axis all is by the independent controller that directly connects in conducting wire, signal is independent of each other, therefore when touch screen surface exists or multiple point touching at 2, but their absolute coordinates perfect representation all, realization multi-point touch function.
Claims (9)
1, a kind of mutual capacitance type touch-screen is characterized in that, it comprises tempered glass (1), optical lens gelatin (2) and capacitive sensing composite structure (3), and this touch-screen is realized the multi-point touch function by mutual capacitance type.
2, tempered glass as claimed in claim 1 (1) is characterized in that, material is a soda-lime-silica glass, and through the chemical enhanced processing of ion-exchange; It is divided into viewfinder area (4) and non-viewfinder area (5), and the lower surface of non-viewfinder area (5) is the color decorating film.
3, the thickness range of tempered glass as claimed in claim 2 (1) is 0.3～3mm.
4, can there be Ni, Cr or its metal and alloy firm between color decorating film as claimed in claim 2 and the tempered glass (1).
5, capacitive sensing composite structure as claimed in claim 1 (3) is characterized in that, comprises the capacitive sensing unit and the conductive lead wire of optical clear base material, substrate surface.
6, optical clear base material as claimed in claim 5 is glass or other optical clear organic material, as PET, PC etc.
7, capacitive sensing as claimed in claim 5 unit is made up of the rhombus nesa coating of matrix distribution, and these conducting films are divided into vertical conduction and connect and be connected two classes with transverse conductance, represent X-axis coordinate and Y-axis coordinate respectively.The nesa coating of the nesa coating of X-axis coordinate and Y-axis coordinate can be positioned at same plane, also can be in different plane, if in same plane, their intersection is insulated separately.
8, the material of nesa coating as claimed in claim 7 is the film that ito thin film or ZnO mix Al.
9, conductive lead wire as claimed in claim 5 is made up of many groups lead, and they are the separate connection right 7 described capacitive sensing unit that laterally connected that vertically reach respectively, and its preparation method comprises physical vacuum plated film or serigraphy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201360371U CN201402457Y (en) | 2009-03-30 | 2009-03-30 | Mutual capacitance type touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201360371U CN201402457Y (en) | 2009-03-30 | 2009-03-30 | Mutual capacitance type touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201402457Y true CN201402457Y (en) | 2010-02-10 |
Family
ID=41662254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201360371U Ceased CN201402457Y (en) | 2009-03-30 | 2009-03-30 | Mutual capacitance type touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201402457Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887336A (en) * | 2010-07-15 | 2010-11-17 | 汉王科技股份有限公司 | Multipoint touch device and method for carrying out multipoint touch detection on same |
| CN102033672A (en) * | 2010-10-13 | 2011-04-27 | 深圳欧菲光科技股份有限公司 | Capacitive touch screen with single-layer electrode |
| CN102810020A (en) * | 2011-06-02 | 2012-12-05 | 东莞万士达液晶显示器有限公司 | touch panel |
| CN102841694A (en) * | 2011-06-20 | 2012-12-26 | 介面光电股份有限公司 | Frame structure of touch panel |
| CN102968234A (en) * | 2012-11-27 | 2013-03-13 | 南昌欧菲光科技有限公司 | Film capacitive touch screen with bridging structure |
| CN103105968A (en) * | 2013-01-23 | 2013-05-15 | 东莞市蜀振昌电子科技有限公司 | Novel touch screen cover plate decorative glass and production process thereof |
| WO2013067954A1 (en) * | 2011-11-09 | 2013-05-16 | 宸鸿科技(厦门)有限公司 | Method for manufacturing touch panel |
| CN103257765A (en) * | 2012-02-15 | 2013-08-21 | 林志忠 | Capacitive touch control unit |
| CN103631456A (en) * | 2012-08-24 | 2014-03-12 | 深圳欧菲光科技股份有限公司 | Thin film inductor, a capacitive touch screen comprising inductor and manufacturing method thereof and terminal product |
| CN103713773A (en) * | 2012-01-04 | 2014-04-09 | 胜华科技股份有限公司 | Touch device, touch display device and organic light emitting diode display device |
| JP2014078218A (en) * | 2012-09-19 | 2014-05-01 | Fujifilm Corp | Method for manufacturing electrostatic capacitance type input device, electrostatic capacitance type input device and image display device equipped with the same |
| TWI470521B (en) * | 2012-10-16 | 2015-01-21 | Mstar Semiconductor Inc | Self-capacitive touch control apparatus and control method thereof |
| CN104461118A (en) * | 2010-09-29 | 2015-03-25 | 大日本印刷株式会社 | Touchscreen panel sensor film and manufacturing method thereof |
| TWI494814B (en) * | 2013-05-30 | 2015-08-01 | Nanchang O Film Tech Co Ltd | Transparent conductive film |
| US9888843B2 (en) | 2015-06-03 | 2018-02-13 | Microsoft Technology Licensing, Llc | Capacitive sensors for determining eye gaze direction |
-
2009
- 2009-03-30 CN CN2009201360371U patent/CN201402457Y/en not_active Ceased
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887336A (en) * | 2010-07-15 | 2010-11-17 | 汉王科技股份有限公司 | Multipoint touch device and method for carrying out multipoint touch detection on same |
| CN104461118B (en) * | 2010-09-29 | 2018-10-16 | 大日本印刷株式会社 | Touch panel sensor film and its manufacturing method |
| CN104461118A (en) * | 2010-09-29 | 2015-03-25 | 大日本印刷株式会社 | Touchscreen panel sensor film and manufacturing method thereof |
| CN102033672A (en) * | 2010-10-13 | 2011-04-27 | 深圳欧菲光科技股份有限公司 | Capacitive touch screen with single-layer electrode |
| CN102810020A (en) * | 2011-06-02 | 2012-12-05 | 东莞万士达液晶显示器有限公司 | touch panel |
| CN102841694A (en) * | 2011-06-20 | 2012-12-26 | 介面光电股份有限公司 | Frame structure of touch panel |
| WO2013067954A1 (en) * | 2011-11-09 | 2013-05-16 | 宸鸿科技(厦门)有限公司 | Method for manufacturing touch panel |
| CN103713773A (en) * | 2012-01-04 | 2014-04-09 | 胜华科技股份有限公司 | Touch device, touch display device and organic light emitting diode display device |
| CN103257765A (en) * | 2012-02-15 | 2013-08-21 | 林志忠 | Capacitive touch control unit |
| CN103631456A (en) * | 2012-08-24 | 2014-03-12 | 深圳欧菲光科技股份有限公司 | Thin film inductor, a capacitive touch screen comprising inductor and manufacturing method thereof and terminal product |
| CN103631456B (en) * | 2012-08-24 | 2017-07-04 | 深圳欧菲光科技股份有限公司 | Film inductor, the capacitance touch screen comprising the inductor and preparation method thereof and end product |
| JP2014078218A (en) * | 2012-09-19 | 2014-05-01 | Fujifilm Corp | Method for manufacturing electrostatic capacitance type input device, electrostatic capacitance type input device and image display device equipped with the same |
| TWI470521B (en) * | 2012-10-16 | 2015-01-21 | Mstar Semiconductor Inc | Self-capacitive touch control apparatus and control method thereof |
| CN102968234A (en) * | 2012-11-27 | 2013-03-13 | 南昌欧菲光科技有限公司 | Film capacitive touch screen with bridging structure |
| CN103105968A (en) * | 2013-01-23 | 2013-05-15 | 东莞市蜀振昌电子科技有限公司 | Novel touch screen cover plate decorative glass and production process thereof |
| TWI494814B (en) * | 2013-05-30 | 2015-08-01 | Nanchang O Film Tech Co Ltd | Transparent conductive film |
| US9888843B2 (en) | 2015-06-03 | 2018-02-13 | Microsoft Technology Licensing, Llc | Capacitive sensors for determining eye gaze direction |
| US11287930B2 (en) | 2015-06-03 | 2022-03-29 | Microsoft Technology Licensing, Llc | Capacitive sensors for determining eye gaze direction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20150626 Decision number of declaring invalidation: 26287 Granted publication date: 20100210 |