CN102298459A - Touch control panel - Google Patents
Touch control panel Download PDFInfo
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- CN102298459A CN102298459A CN2010102132948A CN201010213294A CN102298459A CN 102298459 A CN102298459 A CN 102298459A CN 2010102132948 A CN2010102132948 A CN 2010102132948A CN 201010213294 A CN201010213294 A CN 201010213294A CN 102298459 A CN102298459 A CN 102298459A
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- conductive film
- contact panel
- electroconductive film
- ohm
- base plate
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Abstract
The invention relates to a touch control panel, comprising a flexible substrate and an electroconductive film. The electroconductive film is arranged on the flexible substrate, wherein the surface resistance value of the electroconductive film ranges between 10<-4> ohm/square meter (omega/m<2>) and 200 ohm/square meter, and the light transmittance of the electroconductive film is at least 87%. The electroconductive film comprises a plurality of metal wire sections and further comprises a metal mesh. By adoption of a microstructured metal material as the electroconductive film, the electroconductive film is endowed with high light transmittance, low surface resistance value and favorable flexibility, so that the flexibility of the touch control panel is greatly increased.
Description
Technical field
The present invention relates to a kind of contact panel, relate in particular to a kind of contact panel with high light line penetrance and bottom surface impedance.
Background technology
In order to reach more convenient, lighter and handyizatioier of volume and more humane purpose, the input mode of many information products changes the mode of touch-control device as input of using into by devices such as traditional keyboard or mouses.Touch-control device can be assembled on the flat-panel screens of many kinds, so that flat-panel screens is with the function of display frame and input operation information.
With regard at present common touch-control device, capacitance type touch-control panel and electric resistance touch-control panel are the most universal.Especially, the user only need touch the capacitance type touch-control panel surface can carry out touch control operation and make capacitance type touch-control panel more the user have deep love for.
What deserves to be mentioned is, no matter capacitance type touch-control panel or electric resistance touch-control panel, (Indium Tin Oxide abbreviates as: the ITO) conductive film used as sensing of film all to need to adopt whole layer indium tin oxide.Yet, when indium and tin oxide film is deposited on the flexible base plate, only can adopt the lower processing procedure of process temperatures.Low temperature process makes the light penetration rate of indium and tin oxide film present opposite variation tendency with the face resistance.So the use of indium and tin oxide film can't take into account electrically and light peneration, and can't reach desirable quality.In addition, the pliability of indium and tin oxide film is good and cause the damage of product easily.
Summary of the invention
The purpose of this invention is to provide a kind of contact panel, it has excellent electrical property and light peneration.
The invention provides a kind of contact panel, comprise a flexible base plate and a conductive film.Conductive film is disposed on the flexible base plate, and wherein the face resistance of conductive film is between 10
-4Ohm-sq (Ω/) to 200 ohm-sq, and the light transmittance of conductive film is at least 87%.
Based on above-mentioned, the present invention adopt the wire segments interweave or wire netting as the conductive film of contact panel so that conductive film with high light line penetrance, bottom surface resistance and good flexibility.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 is the partial cutaway schematic of contact panel of the present invention.
Fig. 2 A and Fig. 2 B are the synoptic diagram of the conductive film of one embodiment of the invention at microscopically.
Fig. 2 C is the synoptic diagram that the conductive film of Fig. 2 A is patterned.
Fig. 3 is the relation of conductive film between face impedance, distribution density and light transmittance that wire segments constituted that adopt in one embodiment of the invention.
Fig. 4 is the synoptic diagram of the conductive film of another embodiment of the present invention at microscopically.
Fig. 5 is the measuring method of the deflection character of contact panel.
The main element symbol description:
100: contact panel; 110: flexible base plate;
120,120A: conductive film; 120B: wire netting;
122A: wire segments; 122B: cap holes;
200: tool; D: diameter;
D: argyle design; 1,2: distributing line;
W: live width.
Embodiment
Fig. 1 is the partial cutaway schematic of contact panel of the present invention.Please refer to Fig. 1, contact panel 100 comprises a flexible base plate 110 and a conductive film 120.Conductive film 120 is disposed on the flexible base plate 110.In the present embodiment, have good light peneration matter and good sensing accuracy in order to make contact panel 100, the face resistance of conductive film 120 must be between 10
-4Ohm-sq to 200 ohm-sq, and the light transmittance of conductive film 120 is at least 87%.That is to say that conductive film 120 of the present invention must be with high light line penetrance and bottom surface impedance so that contact panel 100 has desirable quality.
In order to realize the characteristic of light penetration rate and bottom surface impedance, below explanation will propose the embodiment of a plurality of conductive films particularly, but following embodiment is not in order to limit the present invention.Fig. 2 A and Fig. 2 B are the synoptic diagram of the conductive film of one embodiment of the invention at microscopically.Please be simultaneously with reference to Fig. 1 and Fig. 2 A, conductive film 120A for example is interwoven by many wire section 122A.That is to say that wire segments 122A scatters (scattered) in also interlaced with each other to constitute the conductive film 120 on the contact panel 100 on the flexible base plate 110.By Fig. 2 A and Fig. 2 B as can be known, the length of a wire section 122A can be by 5 microns (μ m) to 150 microns, live width W then by 5 nanometers (nm) to 20 nanometers.
In the present embodiment, the production method of conductive film 120A can be that wire segments 122A evenly is mixed in the transparent colloid (or solution).Then, the transparent colloid (or solution) that is mixed with wire segments 122A is coated the flexible base plate 110 of Fig. 1, treat to form the conductive film 120A that wire segments 122A is interwoven after transparent colloid (or solution) solidifies.
In the application of reality, conductive film 120A be formed at behind the flexible base plate 110 can be with design patterning.Fig. 2 C is the synoptic diagram that the conductive film of Fig. 2 A is patterned.Please refer to Fig. 2 C, suppose that conductive film 120A is scheduled to be cut into a plurality of argyle design D.The part of conductive film 120A beyond argyle design D can remove by modes such as micro image etching procedure, cut processing procedures and can obtain required pattern.Because wire segments 122A is interlaced with each other and have uniform distribution density in fact, the wire segments 122A in each argyle design D can electrically connect each other.Therefore, when the conductive film 120A behind the patterning was applied to contact panel 100, each argyle design D can be considered as a sensing electrode.
Hence one can see that, and conductive film 120A can be complete being disposed at continuously on the flexible base plate 110, also can pass through patterning process such as micro image etching procedure, cut and printing process and constitute different design.Certainly, the design of conductive film 120A is not limited thereto, and it also can be a plurality of strip shaped electric poles, a plurality of sensing serials or the electrode pattern of other shapes etc.In other words, contact panel 100 of the present invention can be various electric resistance touch-control panels or various capacitance type touch-control panel.
Particularly, Fig. 3 is the relation of conductive film between face impedance, distribution density and light transmittance that wire segments constituted that adopt in one embodiment of the invention, wherein transverse axis is expressed as face impedance (unit: ohm-sq), the left side longitudinal axis is distribution density (unit: bar/micron square), and the right side longitudinal axis then is a light transmittance (unit: %).Please be simultaneously with reference to Fig. 2 A and Fig. 3, among the conductive film 120A that is made of wire segments 122A, wire segments 122A distribution density reduces along with the increase of face impedance, and it is shown in distributing line 1; And light transmittance increases along with the increase of face impedance, and it is shown in distributing line 2.
As shown in Figure 3, the distribution density of wire segments 122A is in the time of 0.09/micron square to 0.16/micron square, and light transmittance can maintain more than 90%, and the face impedance all maintains below 200 ohm-sq.Therefore, light peneration matter that conductive film 120A tool is good and favorable conductive character.
In other words, elongated wire segments 122A area occupied is small, even the distribution density of elongated wire segments 122A is greater than 0.09/micron square of (pcs/ μ m
2), the light transmittance of conductive film 120A also can be greater than 87%.In addition, metal material has good electrical conductivity, and the network structure that electrically connects to constitute of repeatedly putting interlaced with each other between the adjacent wire segments 122A.Therefore, the face resistance of conductive film 120A can maintain below 200 ohm-sq, for example between 10
-4Ohm-sq to 200 ohm-sq.Therefore, still can reach desirable conduction property and make conductive film 120A meet the demand of contact panel 100 even wire segments 122A area occupied is small.What deserves to be mentioned is that the deviser more can adjust the distribution density of wire segments 122A to obtain the character of required conductive film 120A according to different demands.
In addition, the present invention also can adopt other mode to realize that high light line penetrates the conductive film of character and bottom surface impedance.For example, Fig. 4 is the synoptic diagram of the conductive film of another embodiment of the present invention at microscopically.Please be simultaneously with reference to Fig. 1 and Fig. 4, conductive film 120 can be made of a wire netting 120B shown in Figure 4, and wherein wire netting 120B has the cap holes 122B of a plurality of irregular distributions.Wire netting 120B for example is the network structure that metal and organic material form through self-organization (self-organization) effect.That is to say that wire netting 120B constitutes network structure by isoplanar metal material in fact, the wire segments 122A of itself and Fig. 2 A network structure that repeatedly is set to that interweaves is incomplete same.
The distribution of cap holes 122B makes wire netting 120B have enough light transmittances and can be used as the conductive film 120 of the contact panel 100 of Fig. 1.What deserves to be mentioned is that the deviser can adjust the distribution density of cap holes 122B and size to obtain the character of required conductive film 120 according to different demand.Certainly, the deviser can be according to different demands with wire netting 120B patterning to obtain required electrode shape, for example strip, argyle design, tandem shape etc.
Generally speaking, in the contact panel 100 of Fig. 1, conductive film 120 mainly is made of the metal material of trickle shape structure (for example filament, reticulate texture), and wherein trickle shape structure area occupied ratio is little, and metal material has good electric conductivity.Therefore, contact panel 100 can have high light line penetrance and good electrical conductivity.In addition, metal material is ductile, so contact panel 100 also can have the character of good deflection.
Fig. 5 is the measuring method of the deflection character of contact panel.Please refer to Fig. 5, in general, the deflection character of contact panel 100 can be measured by following step.Contact panel 100 is positioned on the tool 200 of a circle, and along tool 200 bending contact panels 100.Subsequently, observe the contact panel 100 that bent.Do not represent that then contact panel 100 flexibilities are good if produce slight crack on the contact panel 100, represent that then contact panel 100 flexibilities are not good if produce slight crack on the contact panel 100.In addition, when the diameter d of tool 200 is more little, contact panel 100 does not produce slight crack yet and represents that then the deflection character of contact panel 100 is good more.
With contact panel 100, flexible base plate 110 itself has pretty good pliability, so the pliability of contact panel 100 integral body mainly is subject to conductive film 120.Therefore, below conductive film 120 of the present invention is compared with existing indium and tin oxide film.
The existing employing in the contact panel of indium and tin oxide film as sensing electrode, during less than 20 millimeters (mm), indium and tin oxide film will produce slight crack in flexual measuring process in the diameter d of tool 200.Therefore, even adopt flexual bearing substrate, existing contact panel still has the not good problem of pliability.But, contact panel 100 of the present invention with the metal material of trickle shape structure as conductive film 120.Metal material has ductility preferably, so in the diameter d of tool 200 during less than 20 millimeters (mm), conductive film 120 does not still have slight crack.Hence one can see that, and contact panel 100 has more superior deflection character than existing design.In addition, conductive film 120 of the present invention also has more superior anti-chemical agent corrosive power than indium and tin oxide film.
In sum, the present invention adopts the conductive film of the metal material of trickle shape structure as contact panel, and wherein metal material has satisfactory electrical conductivity and ductility, and trickle shape structural design area occupied ratio is little.Therefore, the effectively reduction of face impedance of the conductive film of contact panel, and the light penetration rate can effectively improve.In addition, the pliability of contact panel also can significantly promote.
Though the present invention discloses as above with embodiment; but it is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; can suitably change or be equal to replacement, so protection scope of the present invention should be as the criterion with the scope that claims were defined.
Claims (6)
1. a contact panel is characterized in that, comprising:
One flexible base plate; And
One conductive film is disposed on the described flexible base plate, and the face resistance of wherein said conductive film is between 10
-4Ohm-sq to 200 ohm-sq, and the light transmittance of described conductive film is at least 87%.
2. contact panel according to claim 1 is characterized in that described conductive film comprises many wire section, and described many wire section intersperses among on the described flexible base plate, and described many wire section is interlaced with each other.
3. contact panel according to claim 2 is characterized in that, the length of each described wire segments is by 5 microns to 150 microns.
4. contact panel according to claim 2 is characterized in that, the live width of each described wire segments is by 5 nanometer to 20 nanometers.
5. contact panel according to claim 2 is characterized in that, the distribution density of described many wire section is greater than 0.09/micron square.
6. contact panel according to claim 1 is characterized in that described conductive film comprises a wire netting, and described wire netting has the cap holes of a plurality of irregular distributions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102132948A CN102298459A (en) | 2010-06-23 | 2010-06-23 | Touch control panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102132948A CN102298459A (en) | 2010-06-23 | 2010-06-23 | Touch control panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102298459A true CN102298459A (en) | 2011-12-28 |
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ID=45358915
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102132948A Pending CN102298459A (en) | 2010-06-23 | 2010-06-23 | Touch control panel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104298388A (en) * | 2013-07-17 | 2015-01-21 | 胜华科技股份有限公司 | Touch pad and method for forming grid of touch pad |
| TWI472982B (en) * | 2012-11-30 | 2015-02-11 | Henghao Technology Co Ltd | Touch panel |
| CN107704140A (en) * | 2017-11-10 | 2018-02-16 | 业成科技（成都）有限公司 | Has bendable touch control sensor of nm metal array and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050215689A1 (en) * | 2002-06-13 | 2005-09-29 | Arkady Garbar | Nano-powder-based coating and ink compositions |
| CN101292362A (en) * | 2005-08-12 | 2008-10-22 | 凯博瑞奥斯技术公司 | Nanowires-based transparent conductors |
| CN101589473A (en) * | 2006-10-12 | 2009-11-25 | 凯博瑞奥斯技术公司 | Nanowire-based transparent conductors and applications thereof |
-
2010
- 2010-06-23 CN CN2010102132948A patent/CN102298459A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050215689A1 (en) * | 2002-06-13 | 2005-09-29 | Arkady Garbar | Nano-powder-based coating and ink compositions |
| CN101292362A (en) * | 2005-08-12 | 2008-10-22 | 凯博瑞奥斯技术公司 | Nanowires-based transparent conductors |
| CN101589473A (en) * | 2006-10-12 | 2009-11-25 | 凯博瑞奥斯技术公司 | Nanowire-based transparent conductors and applications thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI472982B (en) * | 2012-11-30 | 2015-02-11 | Henghao Technology Co Ltd | Touch panel |
| CN104298388A (en) * | 2013-07-17 | 2015-01-21 | 胜华科技股份有限公司 | Touch pad and method for forming grid of touch pad |
| CN107704140A (en) * | 2017-11-10 | 2018-02-16 | 业成科技（成都）有限公司 | Has bendable touch control sensor of nm metal array and preparation method thereof |
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Application publication date: 20111228 |