CN104090675A - Touch panel sensor and touch panel - Google Patents
Touch panel sensor and touch panel Download PDFInfo
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- CN104090675A CN104090675A CN201410264073.1A CN201410264073A CN104090675A CN 104090675 A CN104090675 A CN 104090675A CN 201410264073 A CN201410264073 A CN 201410264073A CN 104090675 A CN104090675 A CN 104090675A
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- electrode
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- routing layer
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Abstract
The invention provides a touch panel sensor which comprises a substrate and at least one electrode wiring layer formed on at least one surface of the substrate, wherein each electrode wiring layer comprises an electrode area and an electrodeless area; a layer of optical thin film is formed on the surface, far away from the substrate, of each electrode wiring layer; and the refractive index of each optical thin film layer is higher than that of the substrate and smaller than that of the electrode area of each electrode wiring layer. According to the touch panel sensor and the touch panel, the optical thin film is formed on the surface of each electrode wiring layer, so that the reflectivity on the optical thin films corresponding to the electrode areas and the reflectivity on the optical thin films corresponding to the electrodeless areas is balanced and enabled to be approximated, so that the electrode bottom shadow is eliminated, a high-quality visual effect is provided, and the product performance is improved.
Description
Technical field
The present invention relates to touch screen technology field, relate in particular to a kind of functional sheet and touch-screen of touch-screen.
Background technology
Touch-screen (Touch panel) is as a kind of up-to-date computer input apparatus, it is the simplest, convenient, natural a kind of man-machine interaction mode at present, is widely used in the many aspects such as mobile phone, flat pannel display, vehicle mounted guidance, Industry Control, multimedia teaching.The core component of touch-screen is functional sheet (Sensor), forms by a series of photoetching, coating process.The functional sheet of touch-screen has single or multiple electrode routing layers at present, each electrode routing layer includes electrode zone and electrodeless region, owing to having, the reflectivity in electrode zone and electrodeless region is not identical, make can see under reflective-mode shadow at the bottom of electrode, affect visual effect and properties of product.
Refer to shown in Fig. 1, for the electrode routing layer of the functional sheet of existing touch-screen has electrode zone index path, describe with the functional sheet with single-layer electrodes routing layer.Electrode routing layer upper and lower surface reflection coefficient: r
01 +, r
02 +, another, n
0for the refractive index of air, n
1for electrode routing layer has the refractive index of electrode zone, n
2for the refractive index of substrate, d
1for the thickness that has electrode zone of electrode routing layer.
(a) by fresnel formula reflection coefficient,
r
01 +=(n
0-n
1)/(n
0+n
1) ①,
r
02 +=(n
1-n
2)/(n
1+n
2) ②,
There is the amplitude stack that the catoptrical amplitude of electrode zone upper surface is each folded light beam, can have the total reflectivity on electrode zone by optical computing:
③，
Wherein,
δ 0=4 π n
1d
1/ λ 4..
(b) as above-mentioned d
1=0 o'clock is the electrodeless region of electrode routing layer, by above-mentioned 1. 2. 3. 4. Shi Ke get, the reflectivity R in electrodeless region
0'=[(n
0-n
2)/(n
0+ n
2)]
2.
The refractive index n of air
0=1, in the time that electrode routing layer is ITO rete, n
1=2.0; N when substrate is glass substrate
2=1.52; Suppose d
1=30nm, λ=550nm, can be calculated,
R
01 +=-0.33, r
02 +=0.136, R
0=11.34%, R
0'=4.26%, visible R
0compare R
0' much larger, there is the reflectivity in electrode zone and electrodeless region different, make can see under reflective-mode shadow at the bottom of electrode, thereby affected visual effect, be necessary this to improve.
For this reason, someone proposes to make between electrode routing layer and substrate the shadow layer that disappears, as the application number patent that is 201310746250.5, it increases niobium pentaoxide rete and silica coating as the shadow layer that disappears between glassy layer and an ITO rete, reaches the object of the shadow that disappears.But the mode of shadow is generally to make by sputter coating process the shadow layer that disappears at the bottom of existing this elimination, technological process complexity; And it makes electrode routing layer after first making the shadow layer that disappears, the thickness of the shadow layer that disappears can not be adjusted according to the thickness of electrode routing layer, and the shadow effect that disappears is fixed, and cannot further promote.
Summary of the invention
The object of the invention is to overcome the defect of prior art, a kind of functional sheet and touch-screen of touch-screen are provided, can counter electrode routing layer have a reflectivity between electrode zone and electrodeless region, thereby eliminate shadow at the bottom of electrode, and the shadow effect that disappears is controlled, provide the visual effect of high-quality.
For achieving the above object, the invention provides a kind of functional sheet of touch-screen, comprise a substrate and be formed at this substrate at least one side at least one electrode routing layer, this electrode routing layer includes electrode zone and electrodeless region, form one deck optical thin film at each electrode routing layer away from the surface of substrate, the refractive index of this optical thin film is greater than the refractive index of substrate, and is less than the refractive index that has electrode zone of electrode routing layer.
Further, the thickness of each optical thin film comprises the thickness d of optical thin film corresponding on electrodeless region
2and there is on electrode zone a thickness d of corresponding optical thin film
2-d
1, meet the following conditions:
，
Wherein, r
1 +=(n
0-n
3)/(n
0+ n
3), r
2 +=(n
3-n
1)/(n
3+ n
1), r
3 +=(n
3-n
2)/(n
3+ n
2),
δ 1=4 π n
3(d
2-d
1)/λ,
δ 2=4 π n
3d
2/ λ,
Wherein, n
0for the refractive index of air, n
1for electrode routing layer has the refractive index of electrode zone, n
2for the refractive index of substrate, n
3for the refractive index of optical thin film, λ is incident ray wavelength, d
1for the thickness that has electrode zone of arbitrary electrode routing layer, d
2for the thickness of optical thin film corresponding on the electrodeless region of former electrodes routing layer, d
2-d
1for the thickness that has optical thin film corresponding on electrode zone of former electrodes routing layer.
Further, the material of described optical thin film is silicon dioxide, titania or the potpourri of the two.
Further, the material of described substrate is glass, polyethylene terephthalate, polycarbonate, polymethylmethacrylate, PEN, polyethersulfone or cyclic olefin polymer.
Further, described optical thin film is formed at described electrode routing layer surface by bat printing technique.
Further, the one side of described substrate forms one deck electrode routing layer, and described optical thin film is formed at the outside surface of this electrode routing layer.
Further, the two sides of described substrate forms respectively an electrode routing layer, and described optical thin film is formed at respectively the outside surface of this two electrodes routing layer.
Further, the one side of described substrate forms multi-layered electrode routing layer, and described optical thin film is formed at respectively the one side away from substrate of each electrode routing layer.
The present invention also provides a kind of touch-screen, and this touch-screen comprises the functional sheet of arbitrary above-mentioned touch-screen.
Beneficial effect of the present invention: the functional sheet of touch-screen of the present invention and touch-screen, surface at electrode routing layer forms optical thin film, balance have a reflectivity on the optical thin film that reflectivity on the optical thin film that electrode zone is corresponding is corresponding with electrodeless region, both are approached, thereby eliminate shadow at the bottom of electrode, the visual effect of high-quality is provided, and then enhances product performance.
Brief description of the drawings
Fig. 1 is that the electrode routing layer of the functional sheet of existing touch-screen has electrode zone index path;
Fig. 2 is the electrode routing layer index path of the functional sheet of touch-screen of the present invention;
Fig. 3 is the structural representation of the functional sheet of the touch-screen of the embodiment of the present invention 1;
Fig. 4 is the structural representation of the functional sheet of the touch-screen of the embodiment of the present invention 2;
Fig. 5 is the structural representation of the functional sheet of the touch-screen of the embodiment of the present invention 3.
Embodiment
Describe mechanism of the present invention and principle of work in detail below in conjunction with accompanying drawing.For better explanation the present embodiment, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; To those skilled in the art, in accompanying drawing some known features and explanation thereof may to omit be understandable.The corresponding same or analogous parts of same or analogous label.
The invention provides a kind of functional sheet of touch-screen, comprise a substrate and be formed at this substrate at least one side at least one electrode routing layer, this electrode routing layer includes electrode zone and electrodeless region, form one deck optical thin film at each electrode routing layer away from the surface of substrate, the refractive index of this optical thin film is greater than the refractive index of substrate, and be less than the refractive index that has electrode zone, like this for the functional sheet of this optical thin film not, reduce to have the reflectivity of electrode zone, increase the reflectivity in electrodeless region, make the reflectivity of electrode zone and the reflectivity in electrodeless region mutually close, thereby shadow eliminate electrode under reflective-mode at the bottom of.
When total reflectivity on calculating optical film, light is the strongest in the light quantity of the first reflection of Optical Coatings Surface, therefore, do not consider the stack of the inner each folded light beam of optical thin film, while only considering primary event, the present invention increases after one deck optical thin film, has the reflectivity R=[(n of electrode zone
0-n
3)/(n
0+ n
3)]
2, reflectivity the R '=[(n in electrodeless region
0-n
3)/(n
0+ n
3)]
2, wherein, n
0for the refractive index of air, n
3for the refractive index of optical thin film.And the situation in prior art without optical thin film does not consider the stack of electrode routing layer and the inner each folded light beam of substrate while only considering primary event, have the reflectivity R of electrode zone equally
0=[(n
0-n
1)/(n
0+ n
1)]
2, the reflectivity R in electrodeless region
0'=[(n
0-n
2)/(n
0+ n
2)]
2, wherein, n
0for the refractive index of air, n
1for electrode routing layer has the refractive index of electrode zone, n
2for the refractive index of substrate.
As calculated,
，
，
Due to n
0<n
2<n
3<n
1, therefore R-R
0< 0, R '-R
0' > 0, draw thus R < R
0, R ' > R
0'.Therefore, the refractive index of optical thin film is greater than the refractive index of substrate, and be less than the refractive index that has electrode zone of electrode routing layer, for the functional sheet of this optical thin film not, reduce to have the reflectivity of electrode zone, increase the reflectivity in electrodeless region, made the reflectivity of electrode zone and the reflectivity in electrodeless region mutually close, thereby reached the object of eliminating end shadow.
In actual applications, the amplitude stack that the catoptrical amplitude of optical thin film upper surface is each folded light beam.Referring to shown in Fig. 2, is the electrode routing layer index path of the functional sheet of touch-screen of the present invention, taking the functional sheet with single-layer electrodes routing layer as example.
(1) there is the total reflectivity on optical thin film corresponding on electrode zone 201:
，
Wherein,
δ 1=4 π n
3(d
2-d
1)/λ,
r
1 +=(n
0-n
3)/(n
0+n
3) ,
r
2 +=(n
3-n
1)/(n
3+n
1) ,
Wherein, r
1 +, r
2 +be respectively the reflection coefficient on the upper and lower surface of optical thin film of electrode zone 201 correspondences, n
0for the refractive index of air, n
1for electrode routing layer has the refractive index of electrode zone, n
3for the refractive index of optical thin film, λ is incident ray wavelength, d
1for the thickness that has electrode zone of electrode routing layer, d
2for the thickness of optical thin film corresponding on electrodeless region, therefore d
2-d
1for there being the thickness of optical thin film corresponding on electrode zone.
(2) total reflectivity on the optical thin film of correspondence on electrodeless region 202:
，
Wherein,
δ 2=4 π n
3d
2/ λ,
r
1 +=(n
0-n
3)/(n
0+n
3),
r
3 +=(n
3-n
2)/(n
3+n
2),
Wherein, r
1 +, r
3 +be respectively the reflection coefficient on the upper and lower surface of optical thin film of electrodeless region 202 correspondences, n
0for the refractive index of air, n
2for the refractive index of substrate, n
3for the refractive index of optical thin film, λ is incident ray wavelength, d
2for the thickness of optical thin film corresponding on electrodeless region.
Further, can adjust according to the thickness of electrode routing layer the thickness of optical thin film, further promote the effect of eliminating end shadow.The thickness of optical thin film includes the thickness d of the optical thin film that electrode zone is corresponding
2-d
1and the thickness d of optical thin film corresponding to electrodeless region
2.
For obtaining the shadow effect that better disappears, the thickness of described optical thin film should meet the following conditions:
，
Wherein, r
1 +=(n
0-n
3)/(n
0+ n
3), r
2 +=(n
3-n
1)/(n
3+ n
1), r
3 +=(n
3-n
2)/(n
3+ n
2),
δ 1=4 π n
3(d
2-d
1)/λ,
δ 2=4πn
3d
2/λ，
Wherein, n
0for the refractive index of air, n
1for electrode routing layer has the refractive index of electrode zone, n
2for the refractive index of substrate, n
3for the refractive index of optical thin film, λ is incident ray wavelength, d
1for the thickness that has electrode zone 201 of electrode routing layer, d
2for the thickness of optical thin film corresponding on electrodeless region 202, d
2-d
1for there being the thickness of optical thin film corresponding on electrode zone 201.
Because optical thin film is arranged at outermost layer, its thickness is controlled, can control as required different thickness, when the thickness of described optical thin film meets above-mentioned condition, have electrode zone 201 and the difference of electrodeless region 202 corresponding total reflectivities of the functional sheet of this touch-screen are less than 1%, have the shadow effect that better disappears.
Describe the refractive index n of air with a specific embodiment
0=1, in the time that described substrate is glass substrate, n
2=1.52, when electrode routing layer is ITO rete, n
1=2.0, if d
1=30nm, n
3=1.76, d
2=53nm, λ=550nm, can obtain as calculated,
R
1 +=-0.275, r
2 +=-0.064, r
3 +=0.073, R=9.89%, R '=10.04%, visible, R and R ' are basic identical, have the reflectivity on the optical thin film that reflectivity on the optical thin film that electrode zone is corresponding is corresponding with electrodeless region basic identical, thereby have almost eliminated shadow at the bottom of electrode completely, improve visual effect, and then enhance product performance.
Embodiment 1
Refer to shown in Fig. 3, for the structural representation of the functional sheet of the touch-screen of the embodiment of the present invention 1, the functional sheet of this touch-screen comprises a substrate 10 and is formed at an electrode routing layer 20 of these substrate 10 one sides, this electrode routing layer 20 includes electrode zone 201 and electrodeless region 202, form an optical thin film 30 at these electrode routing layer 20 outside surfaces, the refractive index of this optical thin film 30 is greater than the refractive index of substrate 10, and is less than the refractive index that has electrode zone 201.This substrate 10 is transparency carrier, its material is glass, polyethylene terephthalate (PET), polycarbonate (PC), polymethylmethacrylate (PMMA), PEN (PEN), polyethersulfone (PES), cyclic olefin polymer (COC) or other transparent materials, preferably adopt glass, this electrode routing layer 20 is preferably ITO rete.General high rigidity, the insulating material of adopting of this optical thin film 30 made, thereby electrode routing layer 20 had to certain protective effect.The material of this optical thin film 30 is silicon dioxide, titania or the potpourri of the two, is preferably the potpourri of silicon dioxide and titania.
The concrete manufacture craft of functional sheet of the touch-screen of the present embodiment is: make electrode pattern in the one side of substrate 10 and form electrode routing layer 20, bat printing optical thin film 30 on this electrode routing layer 20 again, the thickness of this optical thin film 30 should satisfied condition be controlled according to aforementioned optical thin film, after solidifying, obtains finished product.This manufacture craft is simple, and flow process is short, and optical thin film the cost of material is low, effectively production control cost.
Embodiment 2
Refer to shown in Fig. 4, for the structural representation of the functional sheet of the touch-screen of the embodiment of the present invention 2, the difference of the present embodiment and embodiment 1 is, the functional sheet of this touch-screen comprises a substrate 10 and is formed at respectively the double-edged two electrode routing layers 20 of this substrate 10, forms respectively an optical thin film 30 at the outside surface of this two electrodes routing layer 20.
The concrete manufacture craft of functional sheet of the touch-screen of the present embodiment is: first make electrode pattern in the front of substrate 10 and form front electrode routing layer 20, make electrode pattern at the basic back side again and form backplate routing layer 20, then on the outside surface of front electrode routing layer 20, solidify to form an optical thin film 30 through bat printing, on the outside surface of last electrode routing layer 20 overleaf, solidify to form another optical thin film 30 through bat printing.The thickness of each optical thin film 30 all need to satisfied condition be controlled with reference to aforementioned optical thin film.This manufacture craft is simple, and flow process is short, and optical thin film the cost of material is low, effectively production control cost.
Embodiment 3
Refer to shown in Fig. 5, for the structural representation of the functional sheet of the touch-screen of the embodiment of the present invention 3, the difference of the present embodiment and embodiment 1 is, the functional sheet of this touch-screen comprises a substrate 10 and is formed at the multi-layered electrode routing layer 20 of these substrate 10 one sides, forms an optical thin film 30 in the one side away from substrate 10 of each electrode routing layer 20.
The concrete manufacture craft of functional sheet of the touch-screen of the present embodiment is: first make electrode pattern in the front of substrate 10 and form an electrode routing layer 20, again this electrode routing layer 20 away from the one side of substrate 10 on solidify to form an optical thin film 30 through bat printing, then on optical thin film 30, make electrode pattern and form another electrode routing layer 20, then this electrode routing layer 20 away from the one side of substrate 10 on solidify to form another optical thin film 30 through bat printing.Multi-layered electrode routing layer 20 be can make as required, electrode routing layer 20 and optical thin film 30 on substrate 10, formed successively.The thickness of each optical thin film 30 all need to satisfied condition be controlled with reference to aforementioned optical thin film.This manufacture craft is simple, and flow process is short, effectively production control cost.And in this embodiment, optical thin film 30 is formed between the outside surface and several layers of electrode routing layer 20 of outer electrode routing layer 20, has protective effect between the outside surface to multi-layered electrode routing layer 20 and electrode routing layer 20.
In addition, the present invention also provides a kind of touch-screen, comprises the functional sheet of any one above-mentioned touch-screen, and this touch-screen can control to shadow at the bottom of electrode very little, thereby the visual effect of high-quality is provided, and then has improved properties of product.
In sum, the functional sheet of touch-screen of the present invention and touch-screen, surface at electrode routing layer forms optical thin film, balance have a reflectivity on the optical thin film that reflectivity on the optical thin film that electrode zone is corresponding is corresponding with electrodeless region, both are approached, thereby eliminate shadow at the bottom of electrode, the visual effect of high-quality is provided, and then enhances product performance.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.All any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in the protection domain of the claims in the present invention.
Claims (9)
1. the functional sheet of a touch-screen, comprise a substrate and be formed at this substrate at least one side at least one electrode routing layer, this electrode routing layer includes electrode zone and electrodeless region, it is characterized in that, form one deck optical thin film at each electrode routing layer away from the surface of substrate, the refractive index of this optical thin film is greater than the refractive index of substrate, and is less than the refractive index that has electrode zone of electrode routing layer.
2. the functional sheet of touch-screen according to claim 1, is characterized in that, the thickness of each optical thin film comprises the thickness d of optical thin film corresponding on electrodeless region
2and there is on electrode zone a thickness d of corresponding optical thin film
2-d
1, meet the following conditions:
，
Wherein, r
1 +=(n
0-n
3)/(n
0+ n
3), r
2 +=(n
3-n
1)/(n
3+ n
1), r
3 +=(n
3-n
2)/(n
3+ n
2),
δ 1=4 π n
3(d
2-d
1)/λ,
δ 2=4πn
3d
2/λ，
Wherein, n
0for the refractive index of air, n
1for electrode routing layer has the refractive index of electrode zone, n
2for the refractive index of substrate, n
3for the refractive index of optical thin film, λ is incident ray wavelength, d
1for the thickness that has electrode zone of arbitrary electrode routing layer, d
2for the thickness of optical thin film corresponding on the electrodeless region of former electrodes routing layer, d
2-d
1for the thickness that has optical thin film corresponding on electrode zone of former electrodes routing layer.
3. the functional sheet of touch-screen according to claim 1, is characterized in that, the material of described optical thin film is silicon dioxide, titania or the potpourri of the two.
4. the functional sheet of touch-screen according to claim 1, it is characterized in that, the material of described substrate is glass, polyethylene terephthalate, polycarbonate, polymethylmethacrylate, PEN, polyethersulfone or cyclic olefin polymer.
5. the functional sheet of touch-screen according to claim 1, is characterized in that, described optical thin film is formed at described electrode routing layer surface by bat printing technique.
6. the functional sheet of touch-screen according to claim 1, is characterized in that, the one side of described substrate forms one deck electrode routing layer, and described optical thin film is formed at the outside surface of this electrode routing layer.
7. the functional sheet of touch-screen according to claim 1, is characterized in that, the two sides of described substrate forms respectively an electrode routing layer, and described optical thin film is formed at respectively the outside surface of this two electrodes routing layer.
8. the functional sheet of touch-screen according to claim 1, is characterized in that, the one side of described substrate forms multi-layered electrode routing layer, and described optical thin film is formed at respectively the one side away from substrate of each electrode routing layer.
9. a touch-screen, is characterized in that, this touch-screen comprises the functional sheet of the touch-screen as described in any one in claim 1-8.
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|---|---|---|---|
| CN201410264073.1A CN104090675A (en) | 2014-06-16 | 2014-06-16 | Touch panel sensor and touch panel |
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| CN105807964B (en) * | 2014-12-29 | 2019-11-05 | 南昌欧菲光学技术有限公司 | Dark border touch panel |
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| CN106201071B (en) * | 2016-06-29 | 2019-06-07 | 京东方科技集团股份有限公司 | Touch base plate and preparation method thereof, touch control display apparatus |
| US10452176B2 (en) | 2016-06-29 | 2019-10-22 | Boe Technology Group Co., Ltd. | Touch substrate and manufacturing method thereof, and touch display device |
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| CN106527826B (en) * | 2017-01-09 | 2020-05-01 | 京东方科技集团股份有限公司 | Touch screen, manufacturing method thereof and display device |
| CN108304100A (en) * | 2018-03-07 | 2018-07-20 | 业成科技（成都）有限公司 | Touch panel, using its touch control display apparatus and touch panel manufacturing method |
| WO2020119015A1 (en) * | 2018-12-12 | 2020-06-18 | 武汉华星光电半导体显示技术有限公司 | Touch panel and touch display device |
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Effective date of registration: 20170728 Address after: 516600 Guangdong Industrial Zone, Shanwei City Road, Lee Lee Industrial City, a district of the building fifteenth Applicant after: Truly Opto-Electronics Ltd. Address before: 516600 north section of East Chong Road, Guangdong, Shanwei Applicant before: Xinli Semiconductor Co., Ltd. |
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Application publication date: 20141008 |