CN109196321A - Piezoelectric transducer and the display for having used the piezoelectric transducer - Google Patents
Piezoelectric transducer and the display for having used the piezoelectric transducer Download PDFInfo
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- CN109196321A CN109196321A CN201780033709.3A CN201780033709A CN109196321A CN 109196321 A CN109196321 A CN 109196321A CN 201780033709 A CN201780033709 A CN 201780033709A CN 109196321 A CN109196321 A CN 109196321A
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- piezoelectric transducer
- refractive index
- piezoelectricity
- display
- piezoelectric
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- 229910052731 fluorine Inorganic materials 0.000 claims description 14
- 239000011737 fluorine Substances 0.000 claims description 14
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 claims description 9
- MIZLGWKEZAPEFJ-UHFFFAOYSA-N 1,1,2-trifluoroethene Chemical group FC=C(F)F MIZLGWKEZAPEFJ-UHFFFAOYSA-N 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 239000007767 bonding agent Substances 0.000 claims description 4
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 claims description 4
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- 229910052738 indium Inorganic materials 0.000 description 5
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 5
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
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- 239000011229 interlayer Substances 0.000 description 4
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- 239000007859 condensation product Substances 0.000 description 3
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
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- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 2
- 229920001780 ECTFE Polymers 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
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- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229920001959 vinylidene polymer Polymers 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241000692870 Inachis io Species 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- LZFMACRHJXVTIV-UHFFFAOYSA-N [F].C(=C)Cl Chemical compound [F].C(=C)Cl LZFMACRHJXVTIV-UHFFFAOYSA-N 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
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- 230000008021 deposition Effects 0.000 description 1
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- 230000002542 deteriorative effect Effects 0.000 description 1
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- 235000019441 ethanol Nutrition 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- NJWNEWQMQCGRDO-UHFFFAOYSA-N indium zinc Chemical compound [Zn].[In] NJWNEWQMQCGRDO-UHFFFAOYSA-N 0.000 description 1
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229940043265 methyl isobutyl ketone Drugs 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920000636 poly(norbornene) polymer Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 150000004291 polyenes Chemical class 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
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- 229920002223 polystyrene Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- KUCOHFSKRZZVRO-UHFFFAOYSA-N terephthalaldehyde Chemical compound O=CC1=CC=C(C=O)C=C1 KUCOHFSKRZZVRO-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- JOHWNGGYGAVMGU-UHFFFAOYSA-N trifluorochlorine Chemical compound FCl(F)F JOHWNGGYGAVMGU-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- BNEMLSQAJOPTGK-UHFFFAOYSA-N zinc;dioxido(oxo)tin Chemical compound [Zn+2].[O-][Sn]([O-])=O BNEMLSQAJOPTGK-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention provides the piezoelectric transducer compared with the past for improving translucency and mist degree and the display for having used the piezoelectric transducer.Piezoelectric transducer (10) of the invention, (11) are configured at the display surface of display (12).Piezoelectric transducer (10), (11) have: the piezoelectric membrane (15) with piezoelectricity；Transparent electrode (16), (17) in one side and the another side formation of piezoelectric membrane (15)；The transparent filled layer (18) that the one side opposite with piezoelectric membrane (15) of one is formed in transparent electrode (16), (17).Piezoelectric membrane (15) is that have film-form component made of the coating (14) of piezoelectricity in base film (13) stacking.As piezoelectric membrane (15), the independent film with piezoelectricity can be used.
Description
Technical field
The present invention relates to detect the piezoelectric transducer of pressing and used the display of the piezoelectric transducer.
Background technique
Previous touch panel is installed in the front surface of the display of electronic equipment, for operating electronic equipment.Although touching
Touching panel only can detect that position coordinates, but can also detect pressing force by additional pressure sensor.For example, following patent texts
Offer the touch panel for disclosing in 1 and capable of also detecting pressing force.
The end of the piezoelectric transducer of film-form is adhered to display using bonding agent by the touch panel of patent document 1
On.Space is formd between the piezoelectric transducer and display of film-form.When pressing the piezoelectric transducer of film-form, pressing
Part bent to display, the elongation of the part of pressing.It is produced according to the change in shape of the piezoelectric transducer by the film-form
The intensity of raw signal, detects pressing force.
However, the touch panel of patent document 1 have the space between piezoelectric transducer and display due to film-form and
The worry for deteriorating translucency and mist degree.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2014-134452
Summary of the invention
Problems to be solved by the invention
The purpose of the present invention is to provide the piezoelectric transducer compared with the past for improving translucency and mist degree and use
The display of the piezoelectric transducer.
The solution to the problem
The present invention is the piezoelectric transducer for being configured at the front surface of display.Piezoelectric transducer has: on base film
Piezoelectric membrane or the independent film with piezoelectricity made of the coating with piezoelectricity is laminated；Aforementioned piezoelectric membrane at least
The transparent electrode that one surface side directly or indirectly configures；And fill up transparent filled layer between aforementioned transparent electrode and display.
The refractive index of aforementioned transparent filled layer is the folding between the refractive index of aforementioned transparent electrode and the refractive index of display
Penetrate rate.
Aforementioned transparent filled layer is bonding agent or resin.
The aforementioned coating with piezoelectricity, the independent film with piezoelectricity include fluorine resin.
Aforementioned fluorine resin is vinylidene, trifluoro-ethylene, the two or more copolymer in chlorotrifluoroethylene or is inclined
The polymer of vinyl fluoride.
At least 1 between the base film and coating of aforementioned piezoelectric membrane or between piezoelectric membrane and transparent electrode
Person or the aforementioned independent film with piezoelectricity either side have refractive index adjustment layer.In addition, in aforementioned piezoelectric membrane
Base film and coating between or base film any one of the face of side opposite with coating or have aforementioned
The either side of the independent film of piezoelectricity has anchor coat.
Aforementioned coatings with a thickness of 0.5~10 μm, refractive index adjustment layer with a thickness of 80~160nm, the thickness of transparent electrode
Degree is 20nm or more.In addition, the refractive index of aforementioned coatings is 1.40~1.50, the refractive index of refractive index adjustment layer be 1.50~
1.70, the refractive index of transparent electrode is 1.90~2.10.
Touch panel can also be configured in the side opposite with display of aforementioned piezoelectric membrane.
Display of the invention has above-mentioned piezoelectric transducer, is filled between piezoelectric transducer and display by aforementioned transparent
Layer fills up.
The effect of invention
Piezoelectric transducer of the invention is provided with transparent filled layer in a manner of covering the entire surface opposite with display.Cause
This, it is different from having the piezoelectric transducer of film-form of air layer between display as in the past, it is not easy to make total light transmission
The optical characteristics such as rate, mist degree reduce.The shape in such a way that the refractive index of transparent electrode, transparent filled layer and display gradually changes
At reflection/scattering of light is few, is not easy to reduce optical characteristics.
Display of the invention has above-mentioned piezoelectric transducer, does not have air on the boundary of display and piezoelectric transducer
Layer, and it is filled with transparent filled layer.Therefore, it is not easy to make the optical characteristics such as total light transmittance, the mist degree when recognizing display to reduce.
Detailed description of the invention
Fig. 1 is the figure for schematically showing the composition of piezoelectric transducer of the invention.
Fig. 2 is the other compositions for schematically showing the piezoelectric transducer that indirect configuration of the invention has a transparent electrode
Figure.
Fig. 3 is the other compositions for schematically showing the piezoelectric transducer that indirect configuration of the invention has a transparent electrode
Figure.
Fig. 4 is the other compositions for schematically showing the piezoelectric transducer of two transparent electrodes of indirect configuration of the invention
Figure.
Fig. 5 is the figure for schematically showing other compositions of piezoelectric transducer of the invention.
Fig. 6 is the figure for schematically showing other compositions of piezoelectric transducer of the invention.
Fig. 7 is the figure for schematically showing other compositions of piezoelectric transducer of the invention.
Fig. 8 is the composition for schematically showing the piezoelectric transducer for having used the independent film with piezoelectricity of the invention
Figure.
Fig. 9 is the figure for having the composition of refractive index adjustment layer in the piezoelectric transducer for schematically show Fig. 1.
Figure 10 is the figure for schematically showing the composition for being carried out example 3~9.
Specific embodiment
Piezoelectric transducer and display of the invention are illustrated using attached drawing.
Piezoelectric transducer 10,11 of the invention shown in (a) of Fig. 1, (b) is configured at the display surface of display 12.Piezoelectricity
Sensor 10,11 has: the piezoelectric membrane 15 with piezoelectricity；In the transparent electricity that the one side and another side of piezoelectric membrane 15 are formed
Pole 16,17；In the transparent filled layer 18 that the face opposite with piezoelectric membrane 15 of a transparent electrode 17 is formed.
Piezoelectric membrane 15 is that stacking has film-form component made of the coating 14 of piezoelectricity on base film 13.
[base film]
Base film 13 can for example enumerate: polyethylene terephthalate, polyethylene naphthalate, polyene
The high scores such as hydrocarbon, polycyclic alkene, polycarbonate, polyether sulfone, polyarylate, polyimides, polyamide, polystyrene, polynorbornene
Sub- film.13 preferably clear of base film, heat resistance and the excellent pet film of mechanical property
(PET film), but it is not limited to these.
The thickness of base film 13 is preferably 10 μm or more and 200 μm hereinafter, but being not limited to these.Wherein, substrate is thin
When the thickness of film 13 is lower than 10 μm, the worry that there is operation to become difficult.In addition, having when the thickness of base film 13 is more than 200 μm
It is difficult to the worry for being wound into a roll piezoelectric membrane.In addition, having when the thickness of base film 13 is more than 200 μm by piezoelectric membrane 15
Thickness becomes blocked up worry when being installed on touch panel etc. above.
[coating with piezoelectricity]
Coating 14 with piezoelectricity is made of being coated into film-form on base film 13.Coating with piezoelectricity
14 are not particularly limited as long as the film after coating has piezoelectricity.For the coating 14 with piezoelectricity, it is generally desirable to, even if
Piezoelectricity is also showed that without polarization (polarization process), but piezoelectricity can also be shown after polarization.
Coating 14 with piezoelectricity can for example obtain in the following way: the material of coating being dissolved in solvent and is made
Solution, the apparatus for coating known to bar coater, gravure coater etc. is relatively thin and is uniformly coated on base film 13, then makes
It is dried.
As shown in (a) of Fig. 1 and (b) of Fig. 1, up and down direction of the unlimited level pressure conductive film 15 relative to display 12.Fig. 1
(a) be that base film 13 is located at 12 side of display, (b) of Fig. 1 is that there is the coating 14 of piezoelectricity to be located at 12 side of display.
[material of the coating with piezoelectricity]
The material of coating 14 with piezoelectricity for example can be suitable for using the material comprising fluorine resin.If concrete example is shown
Material comprising fluorine resin, then can be selected from Kynoar, the vinylidene-of the polymer as the ingredient containing vinylidene
Copolymer, the vinylidene-trifluoro-ethylene-chlorotrifluoroethylene copolymer, the copolymerization of hexafluoropropene-vinylidene of trifluoro-ethylene
Object, perfluoroalkyl vinyl ether-vinylidene copolymer, tetrafluoroethene-vinylidene copolymer, the inclined fluorine of hexafluoropropylene oxide-
The copolymer of ethylene, hexafluoropropylene oxide-tetrafluoroethene-vinylidene copolymer, hexafluoropropene-tetrafluoroethene-fluorine second partially
The copolymer of alkene.And these polymer can be used alone or use mixture.More preferably vinylidene-trifluoro-ethylene-
The copolymer of chlorotrifluoroethylene, vinylidene-trifluoro-ethylene copolymer, vinylidene polymer.
When by the materials of vinylidene-trifluoro-ethylene copolymer making coatings 14, vinylidene and trifluoro-ethylene rub
You are than being (70~75) when by being integrally set as 100: (30~25) are suitable.In addition, by vinylidene-trifluoro-ethylene-three
When the material of the copolymer of fluorine vinyl chloride making coatings 14, the molar ratio of vinylidene and trifluoro-ethylene and chlorotrifluoroethylene will be will
Be (63~65) when entirety is set as 100: (27~29): (10~6) are suitable.
[thickness of the coating with piezoelectricity]
Thickness after the drying of coating 14 with piezoelectricity does not limit, but considers aftermentioned optical characteristics, is 0.5 μm
Above and 20 μm or less, preferably 0.5 μm or more and 5 μm or less are suitable.After the drying of coating 14 with piezoelectricity
When thickness is lower than 0.5 μm, there is the incomplete worry of the film to be formed.Thickness after the drying of coating 14 with piezoelectricity is more than 20
μm when, the worry that there is optical characteristics (mist degree and total light transmittance) to become unsuitable for.
[optical characteristics of piezoelectric membrane]
It is the haze value of piezoelectric membrane 15 preferably 5% or less, total due to needing clearly to recognize the image of display 12
Light transmittance preferably 85% or more, more preferable 88% or more, further preferred 90% or more.The haze value of piezoelectric membrane 15 is more than
The case where 5% the case where or total light transmittance are lower than 85%, there is the worry for the image that can not clearly recognize display 12.
[transparent electrode]
Transparent electrode 16,17 is configured at the two sides of piezoelectric membrane 15.With piezoelectricity when pressing piezoelectric transducer 10,11
Coating 14 polarizes, the variation of the current potential for the coating 14 for detecting to have piezoelectricity by a transparent electrode 16.Another is transparent
Electrode 17 becomes reference potential (ground potential).The shape in a manner of the entirety for covering each face of piezoelectric membrane 15 of transparent electrode 16,17
At.
Transparent electrode 16,17 is indium system complex oxide, can typically be enumerated: indium tin composite oxides (ITO:
Indium Tin Oxide), indium zinc composite oxide, the oxidation for being doped with 4 valence metal ions or divalent metal ion can be enumerated
Indium (In2O3).Indium system complex oxide have the feature that visible light region (380~780nm) transmitance be up to 80% with
On, and the sheet resistance of per unit area is low (30~1000 Ω/).
The sheet resistance value of above-mentioned indium system complex oxide be preferably 300 Ω/ (ohms per square) below, into
One step is preferably 150 Ω/.The small transparent electrode 16,17 of sheet resistance can for example obtain in the following way: utilize sputtering method
Or after vacuum vapour deposition forms the uncrystalline layer of indium system complex oxide on curing resin layer, added at 100~200 DEG C
It is heat-treated and uncrystalline layer variation is made to be crystalloid layer.
Transparent electrode 16,17 is not limited to above-mentioned material, can be used: tin zinc oxide, zinc oxide, the oxidation of Fluorin doped tin
The electroconductive polymers such as the transparent conductive oxides such as object, polyethylene dioxythiophene.
[interlayer]
It, can be between base film 13 and coating 14, base film 13 and transparent electrode 17 such as in (a) of Fig. 1
Between or coating 14 and transparent electrode 16 between at least 1 setting refractive index adjustment layer (Index matching
layer).When forming multiple refractive index adjustment layer, between base film 13 and coating 14 and piezoelectric membrane 15 any surface
Form refractive index adjustment layer.Refractive index adjustment layer is the thin layer of number nm~tens of nm or so, adjusts reflectivity.In (b) of Fig. 1
Above-mentioned layer can also be similarly formed.
It can also be formed between base film 13 and coating 14, in base film 13 and the face of coating 14 opposite side
Anchor coat (anchor coat layer).Anchor coat can be improved the adaptation of interlayer.
And then antiblocking layers can also be set between base film 13 and transparent electrode 16,17.Antiblocking layers have anti-
The effect for the film crimping (adhesion) being only overlapped.
For interlayer, can also form a variety of layers on 1 piezoelectric transducer 10,11 and and appointing in non-formation above-mentioned layer
One.
[transparent filled layer]
Transparent filled layer 18 is generally formed the face opposite with piezoelectric membrane 15 of a transparent electrode 17.Transparent
It is filled up between electrode 17 and display 12 by transparent filled layer 18.
Transparent filled layer 18 uses the bonding agent or tree being made of optical clear adhesives or optical clear jointing material
Rouge.The transparent filled layer 18 that can also be formed into sheet is pasted onto the surface of transparent electrode 17 and forms transparent filled layer 18,
Or the transparent filled layer 18 of liquid can also be coated on the surface of transparent electrode 17 and irradiate ultraviolet light make its solidify and shape
At transparent filled layer 18.Transparent filled layer 18 is formed when installing piezoelectric transducer 10,11 on the display 12.It can also show
The front surface of device 12 is pre-formed transparent filled layer 18 rather than is formed in transparent electrode 17.
The refractive index of transparent filled layer 18 is the refraction between the refractive index of transparent electrode 17 and the refractive index of display 12
Rate.Refractive index is gradually changed to inhibit the scattering etc. of light.Transparent electrode 17 is used viscous using tin indium oxide, transparent filled layer 18
When connecing the most surface layer of the function film of the front surface of agent or resin, display 12 using PET film, transparent electrode 17 transparent is filled out
Fill layer 18, the respective refractive index in most surface layer of display 12 can be 1.7,1.5,1.3 or so.
[display]
The flat-panel screens such as liquid crystal display or organic el display can be used in display 12.In the preceding table of display 12
Face is configured with piezoelectric transducer 10,11.Keep piezoelectric transducer 10,11 viscous by the transparent filled layer 18 of piezoelectric transducer 10,11
It is connected to display 12.Do not have air layer, the transparent covering of filled layer 18 display between piezoelectric transducer 10,11 and display 12
The entire front surface of device 12.
[touch panel]
Touch panel can also be configured in the transparent electrode 16 of piezoelectric transducer 10,11.Successively layer on the display 12
It is laminated with piezoelectric transducer 10,11, touch panel.Can also be filled between piezoelectric transducer 10,11 and touch panel with it is above-mentioned
Transparent filled layer 18 identical material is bonded.
Touch panel includes the arbitrary touch panels such as electrostatic capacity type, resistance membrane type.By touch panel detect by
The position of pressure.The transparent electrode 16 of 10,11 upside of piezoelectric transducer can also be made to play a role as the electrode of touch panel.By
In piezoelectric transducer 10,11 will not as being bent in the past, as long as therefore the touch panel of electrostatic capacity type can not be curved
It uses bently.The detection accuracy that can be improved pressing position extends the service life of touch panel.
Embodiments of the present invention are illustrated above, but the present invention is not limited to above embodiment.For example, also
Transparent electrode 16,17 can be configured indirectly relative to piezoelectric membrane 15.Such as (a) of Fig. 2, the piezoelectric transducer of (b) of Fig. 2
20, shown in 21, a transparent electrode 16 only can be directly formed on piezoelectric membrane 15.It is formed on base film 23 and is laminated with
The laminated body 24 of transparent electrode 17 is arranged transparent filled layer 18,25 on the two sides of laminated body 24, a transparent filled layer 25 is glued
It is affixed on piezoelectric membrane 15, another transparent filled layer 18 is pasted on display 12.The transparent covering of filled layer 18,25 stacking
The one side of body 24 and the entirety of another side.It should be noted that base film 23 and transparent filled layer 25 can be used with Fig. 1's
Base film 13 and the identical material of transparent filled layer 18.
As shown in (a) of Fig. 3, the piezoelectric transducer 30,31 of (b) of Fig. 3, only it can directly be formed on piezoelectric membrane 15
Another transparent electrode 17.It is formed in the laminated body 33 for being laminated with a transparent electrode 16 on base film 32, is filled out by transparent
Layer 34 is filled to be bonded laminated body 33 and piezoelectric membrane 15.The substrate with Fig. 1 can be used in base film 32 and transparent filled layer 34
Film 13 and the identical material of transparent filled layer 18.
As shown in (a) of Fig. 4, the piezoelectric transducer 40,41 of (b) of Fig. 4, it can be and be combined with the piezoelectricity biography of Fig. 2 and Fig. 3
The composition of sensor 20,21,30,31.2 laminated bodies 24,33 are made to be adhered to piezoelectric transducer 15 by transparent filled layer 25,36
On, 2 transparent electrodes 16,17 of indirect configuration.
In addition, for the piezoelectric transducer 50 of Fig. 5, in the transparent electrode 16 being formed directly on piezoelectric membrane 15 across
Transparent filled layer 25 is configured with above-mentioned laminated body 24.The transparent electrode 17 of laminated body 24 becomes reference potential.
In Fig. 5, piezoelectric membrane 15 is configured with the coating 14 with piezoelectricity in 12 side of display, but can also show
12 side of device configures base film 13.In addition, laminated body 24 is configured with base film 23 in 12 side of display, but can also show
12 side of device configures transparent electrode 17.
It, can not also be on piezoelectric membrane 15 in the piezoelectric transducer 50 of Fig. 5 as shown in the piezoelectric transducer 60 of Fig. 6
Transparent electrode 16 is directly formed, but prepares above-mentioned laminated body 33 and piezoelectric membrane 15 is adhered to by transparent filled layer 34.With
Similarly, laminated body 33 is configured with base film 32 in 12 side of display to Fig. 5, but can also configure transparent electricity in 12 side of display
Pole 16.
As shown in the piezoelectric transducer 70 of Fig. 7,2 transparent electrodes 16,17 can also be used not to be formed in respective base
Material on piece and be formed in laminated body 71 obtained from 1 base film 72.Laminated body 71 base film 72 one side and
Another side is formed with transparent electrode 16,17.The side of laminated body 71 is adhered on piezoelectric membrane 15 by transparent filled layer 34,
The other side of laminated body 71 is adhered on display 12 by transparent filled layer 18.It should be noted that base film 71 can
To use material identical with the base film 13 of piezoelectric membrane 15.
And then it is not limited to using above-mentioned piezoelectric membrane 15.For example, can also make as shown in the piezoelectric transducer 80 of Fig. 8
Use the independent film 81 with piezoelectricity as the piezoelectric membrane 15 of Fig. 1.In piezoelectric transducer 80, except the list with piezoelectricity
It is composition identical with the piezoelectric transducer 10 of Fig. 1 other than only film 81.The independent film 81 with piezoelectricity is carried out below
Illustrate, but other be formed in touch sensor 10 has been described above so omitting.
[the independent film with piezoelectricity]
Independent film 81 with piezoelectricity is not particularly limited as long as having piezoelectricity.For the list with piezoelectricity
Only film 81, it is generally desirable to, even if also showing that piezoelectricity without polarization (polarization process), but can also be shown after polarization
Piezoelectricity out.
It has been known that there is the following two kinds modes for polarization: polarized contactless and with 2 metal plates folders based on Corona discharge Treatment
It holds film and applies voltage and carry out polarized contact.
[material of the independent film with piezoelectricity]
The material of independent film 81 with piezoelectricity for example can be suitable for using the material comprising fluorine resin.If specifically showing
Example goes out the material comprising fluorine resin, then can be selected from Kynoar, the inclined fluorine of the polymer as the ingredient containing vinylidene
Copolymer, the vinylidene-trifluoro-ethylene-chlorotrifluoroethylene copolymer, hexafluoropropene-vinylidene of ethylene-trifluoroethylene
Copolymer, perfluoroalkyl vinyl ether-vinylidene copolymer, tetrafluoroethene-vinylidene copolymer, Hexafluoropropylene third
Alkane-vinylidene copolymer, hexafluoropropylene oxide-tetrafluoroethene-vinylidene copolymer, hexafluoropropene-tetrafluoroethene-
The copolymer of vinylidene.Furthermore these polymer can be used alone or use mixture.More preferably vinylidene-trifluoro
The copolymer of ethylene-chlorinated, vinylidene-trifluoro-ethylene copolymer, vinylidene polymer.
When vinylidene-trifluoro-ethylene copolymer is used as the material of the independent film 81 with piezoelectricity, inclined fluorine second
The molar ratio of alkene and trifluoro-ethylene is (70~75) when by being integrally set as 100: (30~25) are suitable.In addition, by inclined fluorine
When the material of ethylene-trifluoroethylene-chlorotrifluoroethylene copolymer making coatings 14, vinylidene and trifluoro-ethylene and trifluoro chlorine
The molar ratio of ethylene is (63~65) when by being integrally set as 100: (27~29): (10~6) are suitable.
[thickness of the independent film with piezoelectricity]
The thickness of independent film 81 with piezoelectricity does not limit, but considers aftermentioned optical characteristics, is 0.5 μm or more
And 20 μm or less, preferably 0.5 μm or more and 5 μm or less are suitable.The thickness of independent film 81 with piezoelectricity is lower than
At 0.5 μm, there is the incomplete worry of the film to be formed.When the thickness of independent film 81 with piezoelectricity is more than 20 μm, there is optics
The worry that characteristic (mist degree and total light transmittance) becomes unsuitable for.
Anchor coat (anchor coat can be formed at least one face of the independent film 81 with piezoelectricity
Layer), refractive index adjustment layer (Index matching layer) (optical adjustment layer), at least 1 layer in antiblocking layers.Folding
The rate adjustment layer of penetrating is the thin layer of several nm~tens of nm or so, adjusts reflectivity.Anchor coat can be improved the adaptation of interlayer.Into
And antiblocking layers have the effect for preventing the film being overlapped crimping (adhesion).
In addition, for the piezoelectric transducer 20,21,30,31,40,41,50,60,70 of Fig. 2~Fig. 7, it can be thin by piezoelectricity
Film 15 is replaced into the independent film 81 with piezoelectricity.
Independent film 81 when pressing piezoelectric transducer 80 with piezoelectricity polarizes, and is detected at this time by transparent electrode 16
Potential change, thus, it is possible to detect pressing force.
In addition, above-mentioned refractive index adjustment layer etc. can be used for Fig. 1~7 piezoelectric transducer 10,11,20,21,30,31,
40,41,50,60,70.For example, piezoelectric membrane 15 and transparent electrode 16 have been laminated in Fig. 1, but the piezoelectric transducer 90 of such as Fig. 9,
Shown in 91, refractive index adjustment layer 92 is laminated between piezoelectric membrane 15 and transparent electrode 16.
As the thickness of the coating 14 with piezoelectricity, 0.5~10 μm can be enumerated as an example；As refractive index
The thickness of adjustment layer 92 can enumerate 80~160nm as an example；As the thickness of transparent electrode 16, can enumerate
20nm or more is as an example.In addition, the refractive index as the coating 14 with piezoelectricity, can enumerate 1.40~1.50 works
For an example；As the refractive index of refractive index adjustment layer 92,1.50~1.70 can be enumerated as an example；As transparent
The refractive index of electrode 16 can enumerate 1.90~2.10 as an example.In addition the thickness of base film 13 is set as 2~
100 μm, refractive index is set as 1.50~1.70.By the thickness and refractive index more than being set as, thus transparent electrode 16 and refraction
The reflection differences of rate adjustment layer 92 become good hereinafter, making the appearance of piezoelectric transducer 90,91 for 2.0%.
[embodiment 1]
The optical characteristics that piezoelectric transducer 10 is measured in embodiment 1 is replaced in (a) of Fig. 1 using glass substrate
Display 12, confirms total light transmittance and mist degree.Inclined fluorine is coated on polyethylene terephthalate base film
Ethylene, trifluoro-ethylene, chlorotrifluoroethylene copolymer and made piezoelectric membrane 15.Polyethylene terephthalate substrate is thin
Film is Mitsubishi Plastics Inc LR-50JBN, with a thickness of 50 μm.The copolymerization of vinylidene, trifluoro-ethylene, chlorotrifluoroethylene
Object is Arkema Inc. Piezotech RTTMTS is prepared in MIBK (methyl iso-butyl ketone (MIBK)) by ultrasonic wave molten
Liquid.Followed by bar coater by vinylidene, trifluoro-ethylene, chlorotrifluoroethylene copolymer solution coating in poly- terephthaldehyde
On sour glycol ester base film.Then, by polyethylene terephthalate base film and undried coating at 110 DEG C
Lower drying 5 minutes and made coating.Coating after drying with a thickness of 1 μm.
So that indium tin oxide is formed a film by sputtering on the two sides of above-mentioned piezoelectric membrane 15, and then pastes the transparent of sheet
Filled layer.Indium tin oxide layer with a thickness of 23nm.The transparent filled layer of sheet is Nitto Denko Corp No.25, thick
Degree is 25 μm.
Glass substrate is MATSUNAMI Co. Ltd. system MICRO SLIDE GLASS, with a thickness of 1.2~1.5mm.Glass
Substrate is the substitute of display, refractive index 1.5.
Total light transmittance including piezoelectric transducer 10 and display 12 is 83.9%, mist degree 1.8%.
[embodiment 2]
The optical characteristics that piezoelectric transducer 21 is measured in embodiment 2 is replaced in (a) of Fig. 2 using glass substrate
Display 12, confirms total light transmittance and mist degree.Use the production method of material and piezoelectric membrane 15 and 1 phase of embodiment
Together.Total light transmittance is 85.0%, mist degree 1.4%.
It should be noted that compared with Example 1, the total light transmittance and mist degree of embodiment 2 become good.(a) of Fig. 1 exists
Transparent electrode 17 is directly formd on base film 13, and (a) of Fig. 2 has thoroughly between base film 13 and transparent electrode 22
Bright filled layer 25.Think that there are fine bumps on the surface of transparent electrode 22 (being herein indium tin oxide), by such as Fig. 2
(a) it is covered shown in transparent filled layer 25, so as to prevent the scattering of light.
[comparative example 1]
Transparent filled layer in comparative example 1 and embodiment 1 is changed to air layer, total light transmittance and mist degree have been carried out really
Recognize.Transparent filled layer is not pasted on to the whole face of indium tin oxide, but is pasted on the end of indium tin oxide and in central portion
Form air layer.Total light transmittance is 75.8%, mist degree 2.5%, both poorer than embodiment 1.
[comparative example 2]
The transparent filled layer towards display in comparative example 2 and embodiment 2 is changed to air layer, for foring this
The part of air layer confirmed total light transmittance and mist degree.Total light transmittance is 79.7%, mist degree 1.8%, both than embodiment 2
Difference.
It should be noted that for the thickness in above-described embodiment and comparative example, it is low in the coating 14 of piezoelectric membrane 15 etc.
In the case where 1.0 μm, is observed using transmission electron microscope (Hitachi's system, H-7670) and determine section.Base
The thickness of 1.0 μm of material film 13 etc. or more is surveyed using film thickness gauge (Peacock corporation, digital dial gauge DG-205)
It is fixed.In turn, total light transmittance and mist degree use direct-reading haze meter (Direct reading haze computer) (Suga
Test Instruments corporation HGM-ZDP) it is determined.
Summarize above-described embodiment and comparative example is as shown in table 1.To embodiment 1 and comparative example 1, embodiment 2 and comparative example 2 into
Row compares, it is known that the total light transmittance and mist degree of any embodiment are superior to comparative example, and the application is than previous good optical properties.It needs
It is noted that it is individually total to determine the piezoelectric membrane used in above-described embodiment and comparative example in the same manner as embodiment etc.
Light transmittance and mist degree.Total light transmittance is 91.6%, mist degree 0.9%, meets 85% or more total light transmittance, 5% or less mist degree.
[table 1]
As shown above, it is known that previous air layer is replaced by using transparent filled layer, so that optical characteristics improves.?
When the front surface of display configures piezoelectric transducer, the piezoelectric transducer of the application is not easy to reduce the visual of display.
[embodiment 3~8]
In addition, production has the coating 14 of piezoelectricity, refractive index on 23 μm of thickness of base film 13 as shown in Figure 10
Adjustment layer 92, transparent electrode 16, determine thickness and refractive index.It the results are shown in table 2, " the 1st layer " is with piezoelectricity
Coating 14, " the 2nd layer " is refractive index adjustment layer 92, and " the 3rd layer " is transparent electrode 16.Except refractive index adjustment layer 92 formation with
Outside, same as the previously described embodiments.
For refractive index adjustment layer 92 as shown in table 2 below, refractive index is respectively 1.54,1.62,1.7.Due to according to refraction
Rate difference manufacturing method is different, therefore is illustrated respectively by refractive index.In the case that refractive index is 1.54, with piezoelectricity
Coating 14 one side melamine resin: alkyd resin: the thermohardening type tree of the weight ratio 2:2:1 of organosilan condensation product
The refractive index adjustment layer 92 that rouge (the refractive index n=1.54 of light) forms with a thickness of 120nm.
In the case that refractive index is 1.62, the coated on one side using gravure coater in the coating 14 with piezoelectricity contains
The pH effect of 47 mass parts of uv curing resin, 57 mass parts of zirconia particles (median particle diameter 40nm) and PGME combines
Object (JSR corporation, " OPSTAR Z7412 ", 12 mass % of solid component) exists immediately under windless condition (being lower than 0.1m/ seconds)
Heat drying 1 minute at 60 DEG C.Then, high voltage mercury lamp radiation accumulated light 250mJ/cm is utilized2Ultraviolet light and implement solid
Change processing.It is formd using this method on the coating 14 with piezoelectricity with a thickness of 90,120 or 150nm and refractive index is
1.62 refractive index adjustment layer 92.
In the case that refractive index is 1.7, it is prepared for comprising melamine resin, alkyd resin and organosilan condensation product
Thermohardening type resin (with weight ratio meter melamine resin: alkyd resin: organosilan condensation product=2:2:1) in be mixed with
TiO2The resin combination of the particle of (refractive index=2.35).At this point, having adjusted TiO2The combined amount of particle makes above-mentioned resin group
The refractive index for closing object is 1.70.In addition, coat above-mentioned resin combination on the coating 14 with piezoelectricity and make its solidification, from
And form the refractive index adjustment layer 92 (refractive index 1.70) of thickness 150nm.
It should be noted that foring on the face opposite with coating 14 of base film 13 has the hard of function that prevent adhesion
Coating 94.
Each embodiment have as described above the coating 14 of piezoelectricity with a thickness of 0.5~10 μm, refractive index adjustment layer 92
With a thickness of 80~160nm, transparent electrode 16 with a thickness of 20nm or more.In addition, the refractive index of the coating 14 with piezoelectricity is
1.40~1.50, the refractive index of refractive index adjustment layer 92 is 1.50~1.70, the refractive index of transparent electrode 16 is 1.90~2.10.
The reflection differences of transparent electrode 16 and refractive index adjustment layer 92 are 2% hereinafter, appearance is good.
It should be noted that transparent electrode 16 is etched and desired electrode is made as needed etc..On finding out
When stating refractive index, the refractive index of refractive index adjustment layer 92 uses the part that transparent electrode 16 is eliminated by etching.Therefore, lead to
The reflectivity that air and transparent electrode 16, air and refractive index adjustment layer 92 are found out based on each refractive index is crossed, to acquire reflection
Rate is poor.
[comparative example 3~4]
As the comparative example relative to embodiment 3~8, carry out the case where without refractive index adjustment layer 92 (comparative example 3)
The case where with the refractive index of refractive index adjustment layer 92 less than 1.5 (comparative example 4).In the case where there is no refractive index adjustment layer 92, instead
The rate difference of penetrating is the difference of transparent electrode 16 with the coating 14 with piezoelectricity.Reflection differences are greater than 2%, and appearance is deteriorated.
It should be noted that for the refractive index adjustment layer 92 of (comparative example 4) when refractive index is 1.46, it is dense with solid component
Degree dilutes silica solution (Colcoat Co., Ltd. system, Colcoat P) for 2% mode ethyl alcohol, utilizes silica-coating
Method is coated on the side of the coating 14 with piezoelectricity, is then made it dry, is solidified 2 minutes at 150 DEG C, formed with a thickness of
Layer (the SiO of 120nm2Film, the refractive index 1.46 of light), and made refractive index adjustment layer 92.The system of other compositions in comparative example
It is identical as embodiment to make method.
[table 2]
It can be seen from the above result that: by having transparent electrode 16 on the coating 14 with piezoelectricity, to have because transparent
Electrode 16 shows yellow or dark brown the case where making appearance damage.It, will as representative of the present invention by setting refractive index adjustment layer 92
Transparent electrode 16, refractive index adjustment layer 92, the thickness of coating 14 with piezoelectricity and adjustable refractive index are the range of above-mentioned value,
To which reflection differences can be reduced as shown in table 2, and appearance will not be damaged.It will be appreciated that: even if will be on 15 upper layer of piezoelectric membrane
The composition for being laminated with refractive index adjustment layer 92 and transparent electrode 16 is configured at the front surface of display and is also not easy to damage the outer of display
It sees.
In addition, the present invention can be carried out with the knowledge within the scope of its spirit based on those skilled in the art
Various improvement, amendment, change modes implement.
Industrial availability
Piezoelectric transducer of the invention can be integrally formed with the touch panel for the front surface for being configured at display and be used.
Description of symbols
10,11,20,21,30,31,40,41,50,60,70,80,90,91: piezoelectric transducer
12: display
13,23,32,72: base film
14: the coating with piezoelectricity
15: piezoelectric membrane
16,17,22: transparent electrode
18,25,34: transparent filled layer
24,33: laminated body
81: the independent film with piezoelectricity
92: refractive index adjustment layer
94: there is the hard conating for the function that prevents adhesion
Claims (13)
1. a kind of piezoelectric transducer is configured at the front surface of display, has:
Piezoelectric membrane with piezoelectricity,
The transparent electrode that directly or indirectly configures in at least one side side of the piezoelectric membrane and
Fill up the transparent filled layer between the transparent electrode and display.
2. piezoelectric transducer according to claim 1, wherein the refractive index of the transparent filled layer is the transparent electrode
Refractive index and display refractive index between refractive index.
3. piezoelectric transducer according to claim 1 or 2, wherein the transparent filled layer is bonding agent or resin.
4. piezoelectric transducer according to any one of claim 1 to 3, wherein the piezoelectric membrane with piezoelectricity
It is characterized in that, the coating with piezoelectricity is accumulated on base film, include fluorine resin in the coating with piezoelectricity.
5. piezoelectric transducer according to any one of claim 1 to 3, which is characterized in that the pressure with piezoelectricity
Conductive film is the independent film comprising fluorine resin.
6. the piezoelectric transducer according to claim 4 to 5, wherein the fluorine resin be vinylidene, trifluoro-ethylene,
Two or more copolymer in chlorotrifluoroethylene or the polymer for vinylidene.
7. piezoelectric transducer according to any one of claim 1 to 6, wherein in the base film of the piezoelectric membrane
At least 1 between coating or between piezoelectric membrane and transparent electrode have refractive index adjustment layer.
8. piezoelectric transducer according to claim 7, wherein the coating adjusts with a thickness of 0.5~10 μm, refractive index
Layer with a thickness of 80~160nm, transparent electrode with a thickness of 20nm or more.
9. piezoelectric transducer according to claim 7 or 8, wherein the refractive index of the coating is 1.40~1.50, reflects
The refractive index of rate adjustment layer is 1.50~1.70, the refractive index of transparent electrode is 1.90~2.10.
10. piezoelectric transducer according to claim 4, wherein between the base film and coating of the piezoelectric membrane
Or any one of face of side opposite with coating of base film has anchor coat.
11. piezoelectric transducer according to claim 5, wherein in either one or two of the independent film with piezoelectricity
Face has anchor coat.
12. piezoelectric transducer according to any one of claim 1 to 11, wherein in the piezoelectric membrane and display
The opposite side of device is configured with touch panel.
13. a kind of display, which is characterized in that it has piezoelectric transducer described in any one of claims 1 to 12, piezoelectricity
It is filled up between sensor and display by the transparent filled layer.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
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| JP2016-107052 | 2016-05-30 | ||
| JP2016107052 | 2016-05-30 | ||
| JP2017104592A JP7050426B2 (en) | 2016-05-30 | 2017-05-26 | Piezoelectric sensor and display using the piezoelectric sensor |
| JP2017-104592 | 2017-05-26 | ||
| PCT/JP2017/019983 WO2017209082A1 (en) | 2016-05-30 | 2017-05-30 | Piezoelectric sensor and display using said piezoelectric sensor |
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| CN109196321A true CN109196321A (en) | 2019-01-11 |
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| JP (1) | JP7050426B2 (en) |
| CN (1) | CN109196321A (en) |
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| CN114008424A (en) * | 2019-06-19 | 2022-02-01 | 三井化学株式会社 | Tactile sensor formed on polyimide film having high total light transmittance and switching device using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3970206B1 (en) | 2019-05-15 | 2025-03-12 | TDK Electronics AG | Ferroelectric sensor |
| JP6877525B1 (en) * | 2019-12-26 | 2021-05-26 | 日東電工株式会社 | Decorative laminates, optical laminates, and flexible image display devices |
| WO2022091827A1 (en) * | 2020-10-30 | 2022-05-05 | 株式会社クレハ | Transparent piezoelectric laminated film and touch panel |
| EP4310929A4 (en) * | 2021-03-19 | 2024-08-21 | Kureha Corporation | CONDUCTIVE PIEZOELECTRIC MULTILAYER FILM AND MANUFACTURING METHOD |
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| JP2017215319A (en) | 2017-12-07 |
| JP7050426B2 (en) | 2022-04-08 |
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Application publication date: 20190111 |