CN104182100A - Transparent capacitive touchpad - Google Patents
Transparent capacitive touchpad Download PDFInfo
- Publication number
- CN104182100A CN104182100A CN201310189988.6A CN201310189988A CN104182100A CN 104182100 A CN104182100 A CN 104182100A CN 201310189988 A CN201310189988 A CN 201310189988A CN 104182100 A CN104182100 A CN 104182100A
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- transparent
- transparency conducting
- conducting layer
- transparent insulating
- capacitive sensing
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Abstract
The invention discloses a transparent capacitive touchpad. The transparent capacitive touchpad is characterized in that a first transparent conducting layer, a first transparent insulating layer, a second transparent conducting layer and a second transparent insulating layer are sequentially formed on the surface of a transparent substrate, the transparent conducting layers are provided with a plurality of capacitive sensing columns, the capacitive sensing columns can be arranged in an insulating way by being separated from each other by gaps; the refractive index of light rays of the transparent insulating layers is approximately close to or is higher than that of the transparent conducting layers, the transparent insulating layers are arranged on the surfaces of the transparent conducting layers and are used for enabling each gap in the transparent conducting layers to be filled with insulating materials of the transparent insulating layers, and thus the uniformity of the refractive index of the light rays of the transparent conducting layers can be increased; the transparent insulating layers are film-coating stacking layers which are formed by a plurality of insulating coating films together, and the thickness of each coating film is lower than 100 nm.
Description
Technical field
The present invention relates to transparent capacitive type touch pad, espespecially a kind of transparent capacitance type touch pad structure that reduces dazzle and enhancing optical characteristics.
Background technology
General capacitance touch plate structure is respectively the capacitive sensing row of X, Y-axis to be located on two different conductive layers, then two conductive layers is arranged on a substrate with lamination insulated from each other; On each conductive layer, there are the capacitive sensing row that plural number arranges along the same axis, and the material of noncapacitive induction row part on conductive layer is removed, to form the interval (gaps) of Openworks shape, between each capacitive sensing row, uniformly-spaced made to separate each other by this and be insulation setting.
And use be configured in the display screen of electronic product for touch pad is applicable to before, industry is used the transparent materials such as glass as substrate mostly at present, and adopt tin indium oxide (ITO) transparent conductive material that possesses low resistance and high transmission rate as conductive layer, to can form the capacitive type touch pad of a high transparent, but person as previously mentioned, (what the pattern (pattern) on these conductive layers included ITO material arranges position, capacitive sensing row) and material remove position (, the interval of Openworks shape), because two kinds of positions of pattern have respectively different refractive index (Refractive Index), in other words, the refractive index that position is set at ITO material is about 1.8 left and right, the refractive index that removes position at material is about 1 left and right, this result will make to produce the uneven effect of refraction by the light of these conductive layers, cause screen deformation of image, fuzzy distortion, even cause the shortcomings such as glare phenomenon.
Summary of the invention
In view of this, the invention provides a kind of transparent capacitance type touch pad that reduces dazzle and enhancing optical characteristics, mainly select refractive index (RI, Refractive Index) insulating material that matches with conductive is as insulation course, and make filling insulating material on this insulation course remove the homogeneity that promotes accordingly the ray refractive index of this conductive layer in the space at position to the material on this conductive layer, reach the object of promoting touch pad optical characteristics.
The present invention also provides a kind of improved transparent capacitance type touch pad structure, and the insulation course of its use forms by multicoating is superimposed, and the thickness that arranges that can increase insulation course promotes insulation effect, and can avoid the insulation course arranging to produce stress deformation.
According to the present invention, this transparent capacitance type touch pad is mainly on a transparency carrier surface, sequentially to form the first transparent insulating layer, the first transparency conducting layer, the second transparent insulating layer, the second transparency conducting layer and the 3rd transparent insulating layer.
Wherein this substrate can adopt the glass material of high transmission rate, for example one of soda lime glass, sodium borosilicate glass, lead crystal glass, alumina silicate glass, low iron glass, but except using aforementioned glass material, the material of many other high transmission rates also can meet the requirements, be for example thin plate or the film of the materials such as polycarbonate (PC), polyester (PET) or polymethylmethacrylate (PMMA), the scope of therefore implementing is not limited with previous materials.
Aforementioned each transparency conducting layer is all to use high transmission rate conductive material, for example, be the film of the materials such as tin indium oxide (ITO), indium zinc oxide (IZO), zinc oxide aluminum (AZO) or poly-ethylenedioxy thiophene (PEDOT); There is plural number along the first the first capacitive sensing row that axially arrange at the first transparency conducting layer, between each first capacitive sensing row, made to separate each other by interval and be insulation setting; The second transparency conducting layer has plural number along the second the second capacitive sensing row that axially arrange, and is made to separate each other and be insulation setting between each second capacitive sensing row by interval.
Aforementioned each transparent insulating layer adopts that to have ray refractive index rough close or higher than the insulating material of the first transparency conducting layer, for example, be monox (SiO
2), aluminium oxide (Al
2o
3) or niobium oxide (NB
2o
5) etc. material; Described insulation course is arranged on the surface of aforementioned conductive layer, and makes insulating material fill up the interval on each conductive layer, to promote the homogeneity of ray refractive index of conductive layer, promotes touch pad optical characteristics, reduces that incident light interferes and the effect of diffraction.
In preferred embodiment, aforementioned dielectric layer is made up of plural insulativity plated film, the insulation course of many laminations plated film is except having the advantage of being convenient to arrange processing, also can increase insulation course arrange thickness, promote insulation effect, in addition, plated film insulation course can be made up of jointly the plated film of two or more unlike material, can revise or change thus the refractive index of insulation course entirety, be applicable to obtain one the insulation course refractive index matching with described conductive layer refractive index; Best, described plated film insulation course is three layers or three layers of above odd number lamination, and to make the plated film that is positioned at odd number lamination in described plated film insulation course be to be formed by identical insulating material, the internal stress arranging according to this between can balance plated film lamination is avoided bent twisting strain, in addition, the thickness of each single plated film of this plated film insulation course, below 100nm, can reduce the internal stress of plated film and avoid producing distortion.
Aforementioned dielectric layer is transparent insulating bonding agent in one embodiment, for example, be to contain monox (SiO
2), aluminium oxide (Al
2o
3) or niobium oxide (NB
2o
5) etc. the optical cement (OCA) of polymeric material, this insulativity bonding agent can make firmly combination between each layer of panel, and the insulation function between each conductive layer is provided simultaneously; If again in the time that this insulativity bonding agent is flow-like and coats conductive layer surface, can make insulating material more easily fill up the homogeneity that promotes conductive layer ray refractive index in the interval of this conductive layer.
Other possible embodiments, on transparency carrier surface, the first transparency conducting layer can be directly set, and then as the same disclosed embodiment, sequentially form each transparent insulating layer, transparency conducting layer, in other words be, to be optionally omitted at the first transparent insulating layer of front taking off embodiment.
This will further illustrate other functions of the present invention and technical characterictic below, has the knack of after this operator pores over the explanation in literary composition and can realize according to this present invention.
The present invention selects insulating material that refractive index and conductive match as insulation course, and make filling insulating material on this insulation course remove the homogeneity that promotes accordingly the ray refractive index of this conductive layer in the space at position to the material on this conductive layer, reach and promote touch pad optical characteristics.
Brief description of the drawings
Fig. 1 is member separation graph of the present invention;
Fig. 2 is the planimetric map of Component composition of the present invention;
Fig. 3 is the side cut-away view at the C-C hatching line position of Fig. 2;
Fig. 4 is the rhythmo structure schematic diagram that the present invention uses plated film insulation course;
Fig. 5 is the side cut-away view of another embodiment of the present invention.
Embodiment
As shown in Figure 1 to Figure 3, the touch pad of the embodiment of the present invention is on a surface of substrate 1, sequentially to form the laminations such as a base insulating layer 2, an X-axis conductive layer 3, an intermediate insulating layer 4, a Y-axis conductive layer 5 and a protective surface insulation course 6.
Wherein this substrate 1 is to select refractive index (RI, Refractive Index) to be about 1.5 soda lime glass material.
X, Y-axis conductive layer the 3, the 5th, adopt refractive index to be about 1.8 tin indium oxide (ITO) conductive film; Be provided with most along the equidistant transparent X-axis capacitive sensing row 31 of arranging of X axis at X-axis conductive layer 3, between each X-axis capacitive sensing row 31, there is interval 33, this interval 33 by separate each X-axis capacitive sensing row 31 make be state of insulation setting, and one end edge of aforementioned each X-axis stitching 31 respectively electricity is connected to the signal conductor 32 that is located at edge, and is connected to a signal output end 34; Same, be provided with most along the equidistant transparent Y-axis capacitive sensing row 51 of arranging of Y-axis at Y-axis conductive layer 5, between each Y-axis capacitive sensing row 51, there is interval 53, therefore make each Y-axis capacitive sensing row 51 be separated each other and be state of insulation setting, and one end edge of aforementioned each Y-axis stitching 51 respectively electricity is connected to the signal conductor 52 that is located at edge, and is connected to a signal output end 54.
Aforementioned each insulation course the 2,4, the 6th, adopts good insulating effect and has and the rough close or higher insulating material of refractive index of aforementioned conductive layer 3,5, for example, be to contain monox (SiO
2, RI 1.6), aluminium oxide (Al
2o
3, RI 1.8) or niobium oxide (NB
2o
5, RI 2.3) etc. polymeric material, but implement scope be not limited with previous materials; Generally speaking, the suitable thickness of these insulation courses is between 10-1000nm, in preferred embodiment, these insulation courses are to utilize dry type coating method (Dry Coating Method), and for example vacuum coating technology, is arranged on conductive layer surface by insulativity plated film; The thickness of single plated film is preferably in below 100nm, can avoid thicker plated film easily to produce internal stress, causes plated film warping deformation or check surface, and its insulation characterisitic detracts; Desirable, insulation course the 2,4, the 6th, by the common superimposed thicker plated film insulation course (as shown in Figure 4) that forms of the thin plated film 9 of majority, to reduce the thickness of plated film out of the ordinary, the unfavorable feature of avoiding internal stress to cause; In addition, the insulation course being formed by this most plated films, can use the plated film of two or more unlike material with composition composite film coating insulation course, therefore can obtain the insulation course of a larger thickness and better insulation characterisitic, and adjustablely allot a suitable insulation course refractive index, to must match with conductive layer refractive index; In addition, the plated film lamination of insulation course is preferably odd-level, it is for example three layers or five layers, and the plated film that order is positioned at odd number lamination is to be formed by same material, therefore can make to have between each plated film lamination of this composite film coating insulation course the internal stress of balance, avoid insulation course to produce the shortcoming of stress deformation.
Base insulating layer 2 is covered on the whole surface of substrate 1; Intermediate insulating layer 4 is arranged on the surface of X-axis conductive layer 3, and by filling insulating material in the interval 33 on this conductive layer; Protective surface insulation course 6 is arranged on the surface of Y-axis conductive layer 5, and by filling insulating material in the interval 53 on this conductive layer; By selecting and the insulating material of conductive layer 3,5 index matchings, and by this filling insulating material in the interval 33,53 on conductive layer, to promote the homogeneity of ray refractive index of conductive layer 3,5, reach the object of promoting overall touch pad optical characteristics.
As shown in Figure 5; in another embodiment of the present invention, on transparency carrier 1 surface, X-axis conductive layer 3 can be directly set; and then as the same disclosed embodiment; sequentially form intermediate insulating layer 4, Y-axis conductive layer 5 and protective surface insulation course 6; be to be optionally omitted in the base insulating layer 2 of front disclosed embodiment, be processed into and save material cost to simplify.
Although, with reference to accompanying drawing complete description the present invention in conjunction with specific embodiments, should note haveing the knack of technique personage and can understand various variations and amendment.This type of variation and amendment are understood to include in the defined category of the present invention by appended claims.
Claims (12)
1. a transparent capacitance type touch pad, is characterized in that, is included in and on a transparency carrier surface, sequentially forms the first transparency conducting layer, the first transparent insulating layer, the second transparency conducting layer and the second transparent insulating layer; Described the first transparency conducting layer has plural number along the first the first capacitive sensing row that axially arrange, and between each first capacitive sensing row, is made to separate each other by interval and be insulation setting; Described the first transparent insulating layer adopts that to have refractive index rough close or higher than the insulating material of the first transparency conducting layer, it is arranged on the surface of the first transparency conducting layer, and has filled up the interval between each the first capacitive sensing row; Described the second transparency conducting layer has plural number along the second the second capacitive sensing row that axially arrange, and between each second capacitive sensing row, is made to separate each other by interval and be insulation setting; Described the second transparent insulating layer adopts that to have refractive index rough close or higher than the insulating material of the second transparency conducting layer, it is arranged on the surface of the second transparency conducting layer, and has filled up the interval between each the second capacitive sensing row.
2. transparent capacitance type touch pad as claimed in claim 1 is asked, and it is characterized in that, the material of described transparency carrier is to be selected from one of soda lime glass, sodium borosilicate glass, lead crystal glass, alumina silicate glass, low iron glass.
3. transparent capacitance type touch pad as claimed in claim 1 is asked, and it is characterized in that, also comprises: described transparency carrier material can be selected from one of polymethylmethacrylate, polycarbonate, polyester or cycloolefin co-polymer.
4. transparent capacitance type touch pad as claimed in claim 1 is asked, and it is characterized in that, the material of described the first transparency conducting layer and the second transparency conducting layer is selected from one of tin indium oxide, indium zinc oxide or zinc oxide aluminum.
5. transparent capacitance type touch pad as claimed in claim 1 is asked, and it is characterized in that, described the first transparent insulating layer and the second transparent insulating layer are plated film laminations being jointly made up of plural insulativity plated film, and make the thickness of each single plated film below 100nm.
6. transparent capacitance type touch pad as claimed in claim 5 is asked, and it is characterized in that, the material of described plated film is selected from one of monox, aluminium oxide or niobium oxide.
7. transparent capacitance type touch pad as claimed in claim 5 is asked, and it is characterized in that, described plated film lamination is the plated film lamination with three layers of above odd-level, and the plated film that order is positioned at odd number lamination position is to be formed by same material.
8. transparent capacitance type touch pad as claimed in claim 1 is asked, and it is characterized in that, described the first transparent insulating layer and the second transparent insulating layer are transparent insulating bonding agents.
9. transparent capacitance type touch pad as claimed in claim 1 is asked, and it is characterized in that, is also included in and between described transparency carrier and the first transparency conducting layer, is provided with the 3rd transparent insulating layer.
10. transparent capacitance type touch pad as claimed in claim 9 is asked, and it is characterized in that, the plated film lamination that described the 3rd transparent insulating layer is made up of jointly plural insulativity plated film, and make the thickness of each single plated film below 100nm.
11. transparent capacitance type touch pads as claimed in claim 10 are asked, and it is characterized in that, the material of described plated film is selected from one of monox, aluminium oxide or niobium oxide.
12. 1 kinds of transparent capacitance type touch pads, is characterized in that, are included in and on a transparency carrier surface, sequentially form the first transparency conducting layer, the first transparent insulating layer, the second transparency conducting layer and the second transparent insulating layer; Described the first transparency conducting layer has plural number along the first the first capacitive sensing row that axially arrange, and between each first capacitive sensing row, is made to separate each other by interval and be insulation setting; Described the first transparent insulating layer is the transparent insulating bonding agent that contains one of monox, aluminium oxide or niobium oxide polymeric material, and it is covered in the surface of the first transparency conducting layer, and has filled up the interval between each the first capacitive sensing row; Described the second transparency conducting layer has plural number along the second the second capacitive sensing row that axially arrange, and between each second capacitive sensing row, is made to separate each other by interval and be insulation setting; Described the second transparent insulating layer is the transparent insulating bonding agent that contains one of monox, aluminium oxide or niobium oxide polymeric material, and it is covered in the surface of the second transparency conducting layer, and has filled up the interval between each the second capacitive sensing row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310189988.6A CN104182100A (en) | 2013-05-21 | 2013-05-21 | Transparent capacitive touchpad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310189988.6A CN104182100A (en) | 2013-05-21 | 2013-05-21 | Transparent capacitive touchpad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104182100A true CN104182100A (en) | 2014-12-03 |
Family
ID=51963205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310189988.6A Pending CN104182100A (en) | 2013-05-21 | 2013-05-21 | Transparent capacitive touchpad |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104182100A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482039A (en) * | 2017-08-03 | 2017-12-15 | 京东方科技集团股份有限公司 | A kind of flexible touch-control motherboard and preparation method, flexible touch base plate, contact panel |
-
2013
- 2013-05-21 CN CN201310189988.6A patent/CN104182100A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482039A (en) * | 2017-08-03 | 2017-12-15 | 京东方科技集团股份有限公司 | A kind of flexible touch-control motherboard and preparation method, flexible touch base plate, contact panel |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141203 |
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| WD01 | Invention patent application deemed withdrawn after publication |