WO2014136472A1 - 位置センサ - Google Patents
位置センサ Download PDFInfo
- Publication number
- WO2014136472A1 WO2014136472A1 PCT/JP2014/050401 JP2014050401W WO2014136472A1 WO 2014136472 A1 WO2014136472 A1 WO 2014136472A1 JP 2014050401 W JP2014050401 W JP 2014050401W WO 2014136472 A1 WO2014136472 A1 WO 2014136472A1
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- WIPO (PCT)
- Prior art keywords
- cladding layer
- core
- over
- under
- position sensor
- Prior art date
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- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
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- 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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- 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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0428—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04109—FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location
Definitions
- the present invention relates to a position sensor that optically detects a pressed position.
- Patent Document 1 a position sensor that optically detects a pressed position has been proposed (see, for example, Patent Document 1).
- a plurality of cores serving as optical paths are arranged in the vertical and horizontal directions, and the peripheral portions of the cores are covered with a clad to form a sheet, and light from the light emitting element is incident on one end surface of each of the cores, The light transmitted through each core is detected by the light receiving element at the other end surface of each core.
- the core of the pressed portion is crushed (the cross-sectional area of the core in the pressing direction is reduced). Since the light detection level at the lowering is reduced, the pressed position can be detected.
- an input device for inputting characters or the like an input device having a pressure-sensitive touch panel and a display has been proposed (for example, see Patent Document 2).
- the pressure-sensitive touch panel senses the pressure position of the pen tip and outputs it to the display, and the input character or the like is displayed on the display. It is supposed to be.
- the little finger of the hand holding the writing tool or the base part also comes into contact with the surface of the paper.
- the pressure-sensitive touch panel is not only the pressure position by the pen tip, but also the pressure position by the little finger of the hand holding the writing instrument or the base portion thereof. Therefore, not only the inputted characters but also the unnecessary little finger and the base portion thereof are displayed on the display.
- the present invention has been made in view of such circumstances, and when inputting information such as characters with an input body such as a pen, unnecessary portions such as the little finger of the hand holding the input body and the base portion thereof are not sensed.
- An object of the present invention is to provide such a position sensor.
- the position sensor according to the present invention has a plurality of linear cores arranged in a lattice pattern on the surface of a sheet-like under cladding layer, and the over cladding layer is formed in a state of covering these cores.
- a sheet-shaped optical waveguide formed in a sheet shape, a light-emitting element connected to one end surface of the core, and a light-receiving element connected to the other end surface of the core, and to any part of the surface of itself
- a sheet-like position sensor that identifies a pressing position by a change in the amount of light propagation of the core due to the pressing, wherein the input to the position sensor is a tip input portion having a radius of curvature R (unit: ⁇ m).
- the gap between the core and the under cladding layer and the over cladding layer is Refractive index difference ⁇ is Is set between the maximum value ⁇ max shown by the equation (1) and the minimum value ⁇ min shown by the following equation (2), and the elastic modulus of the core is the elastic modulus of the undercladding layer and the above
- the elastic modulus of the over-cladding layer is set to be greater than the elastic modulus of the over-cladding layer, and the deformation ratio of the cross-section of the core in the pressing direction is greater than the deformation ratio of the cross-sections of the over-cladding layer and the under-cladding layer. It is configured to be smaller.
- the “deformation rate” refers to the ratio of the amount of change of each thickness during pressing to the thickness of the core, over cladding layer and under cladding layer before pressing in the pressing direction.
- the present inventors When inputting information such as characters with an input body such as a pen on the surface of a position sensor having a sheet-shaped optical waveguide in which a plurality of linear cores are arranged and formed in a lattice shape, the present inventors In order to prevent the part of the hand holding the input body from being sensed, research was conducted on the light propagation of the core. In the course of that research, instead of making the core crush (the cross-sectional area is small) by the pressure of the tip of the input body (such as the pen tip) or the hand holding the pen as in the past, The idea was to prevent the core from collapsing with the above pressure (so that the cross-sectional area is maintained).
- the elastic modulus of the core was set to be larger than the elastic modulus of the under cladding layer and the over cladding layer. Then, both the tip input part and the hand part of the input body are deformed so that the over clad layer and the under clad layer are crushed in the pressing direction, and the core maintains the cross-sectional area and the tip input part of the input body. And bent along the hand part so as to sink into the underclad layer 1. The bending of the core was a sharp bend at the tip input portion of the input body and a gentle bend at the hand.
- the present inventors have conducted research on light leakage (scattering) from the core caused by pressing by the tip input portion of the input body in order to increase the detection accuracy of the position of the tip input portion of the input body. Piled up.
- the light leakage (scattering) depends on the refractive index difference ⁇ between the core and the under-cladding layer and the over-cladding layer, and the refractive index difference ⁇ is determined by the tip input portion of the input body. It has been determined that it depends on the radius of curvature R and the thickness T of the core.
- the elastic modulus of the core is set larger than the elastic modulus of the under cladding layer and the elastic modulus of the over cladding layer. Therefore, when the surface of the over clad layer of the optical waveguide is pressed, the deformation rate of the cross section of the core in the pressing direction becomes smaller than the deformation rate of the cross section of the over clad layer and the under clad layer, The cross-sectional area is maintained. Then, when information such as characters is input to the surface of the position sensor with an input body such as a pen, the bending state of the core suddenly extends along the front end input section of the input body at the pressing portion by the tip input section such as the pen tip.
- the refractive index difference ⁇ between the core and the under-cladding layer and the over-cladding layer is expressed by the maximum value ⁇ max represented by the above formula (1) and the above formula (2).
- Is set between the minimum value ⁇ min and the decrease in the light detection level (light leakage (scattering) from the core) caused by pressing by the tip input portion of the input body is optimized and input The detection accuracy of the position of the tip input part of the body can be increased.
- FIG. 1 An embodiment of the position sensor of the present invention is schematically shown, wherein (a) is a plan view thereof and (b) is an enlarged sectional view thereof.
- (A) is sectional drawing which shows typically the state of the said position sensor pressed by the input body
- (b) is sectional drawing which shows typically the state of the said position sensor pressed by the hand. .
- FIG. 1 (a) is a plan view showing an embodiment of the position sensor of the present invention
- FIG. 1 (b) is an enlarged view of the cross section of the central portion thereof.
- the position sensor A of this embodiment includes a rectangular sheet-shaped optical waveguide W in which a lattice-shaped core 2 is sandwiched between a rectangular sheet-shaped underclad layer 1 and an overcladding layer 3, and the lattice-shaped core 2.
- the light emitting element 4 connected to the one end surface of the linear core 2 to comprise, and the light receiving element 5 connected to the other end surface of the said linear core 2 are provided.
- the light emitted from the light emitting element 4 passes through the core 2 and is received by the light receiving element 5.
- the elastic modulus of the core 2 is set larger than the elastic modulus of the under cladding layer 1 and the elastic modulus of the over cladding layer 3. Thereby, when the surface of the rectangular sheet-shaped optical waveguide W is pressed, the deformation rate of the cross section of the core 2 in the pressing direction is smaller than the deformation rate of the cross sections of the over cladding layer 3 and the under cladding layer 1. It is like that.
- the core 2 is indicated by a chain line, and the thickness of the chain line indicates the thickness of the core 2.
- the number of cores 2 is omitted.
- the arrow of Fig.1 (a) has shown the direction where light travels.
- the position sensor A is placed on a flat table 30 such as a table, and the surface of the position sensor A is placed on the lattice-like core 2.
- the pressing portion by the tip input portion 10a such as the pen tip [see FIG. A pressing portion (see FIG. 2 (b)) such as 20 little fingers or a base portion (little finger ball) thereof also has a cross section in the pressing direction so that the over-cladding layer 3 and the under-cladding layer 1 having a low elastic modulus are crushed.
- the core 2 that is deformed and has a large elastic modulus is bent so as to sink into the under-cladding layer 1 along the tip input portion 10a and the hand 20 while maintaining the cross-sectional area.
- the detection level of light at the light receiving element 5 is lowered in the core 2 pressed by the tip input portion 10a, and the detection level is not lowered in the core 2 pressed by the hand 20 having the input body 10. can do.
- the position (coordinates) of the tip input portion 10a can be detected from the decrease in the light detection level.
- the portion of the hand 20 whose detection level does not decrease is the same as the state where it is not pressed, and is not sensed.
- the refractive index difference ⁇ between the core 2 and the under-cladding layer 1 and the over-cladding layer 3 has a maximum value ⁇ max represented by the following formula (1) and the following formula (2). It is set to a value between the indicated minimum value ⁇ min. Thereby, the detection accuracy of the position of the front-end
- A is the ratio between the radius of curvature R (unit: ⁇ m) of the tip input portion 10a such as a pen tip and the thickness T (unit: ⁇ m) of the core 2 ( R / T).
- the refractive index difference ⁇ is larger than the maximum value ⁇ max, even if the tip input portion 10a is pressed, the amount of light leakage (scattering) is small, and the light detection level at the light receiving element 5 is sufficiently lowered. Therefore, the position of the tip input portion 10a and the position of the hand 20 cannot be distinguished with high accuracy.
- the refractive index difference ⁇ is smaller than the minimum value ⁇ min, light leakage (scattering) occurs even in the pressed portion by the hand 20, and the position of the tip input portion 10a and the position of the hand 20 are highly distinguished. It will not be accurate.
- the radius of curvature R (unit: ⁇ m) of the tip input portion 10a is in the range of 100 to 1000
- the thickness T (unit: ⁇ m) of the core 2 is in the range of 10 to 100
- the ratio A is 1 to 1. If it is in the range of 100, the refractive index difference ⁇ is in the range of 1.0 ⁇ 10 ⁇ 3 to 7.95 ⁇ 10 ⁇ 2 .
- the minimum value ⁇ min is set to 1.0 ⁇ 10 ⁇ 3 (constant).
- the position of the distal end input unit 10a detected by the position sensor A and the movement locus (characters, drawings, etc.) of the distal end input unit 10a where the positions continue are stored in, for example, storage means such as a memory as electronic data. It is stored or sent to the display and displayed on the display.
- the input body 10 only needs to be able to press the surface of the position sensor A as described above, and may be not only a writing instrument that can be written on paper with ink or the like, but also a simple rod that cannot be written on paper with ink or the like. Further, when the pressing is released (the tip input part 10a moves or the input such as writing ends), the under cladding layer 1, the core 2 and the over cladding layer 3 are each restored by their own restoring force. Return to the original state (see FIG. 1B).
- the submerged depth D of the core 2 into the under cladding layer 1 is preferably up to 2000 ⁇ m. If it exceeds that, the under cladding layer 1, the core 2 and the over cladding layer 3 may not return to their original state, or the optical waveguide W may be cracked.
- the elastic modulus of the core 2 is preferably in the range of 1 GPa to 10 GPa, more preferably in the range of 2 GPa to 5 GPa.
- the elastic modulus of the core 2 is less than 1 GPa, the cross-sectional area of the core 2 may not be maintained due to the pressure of the tip input portion 10a due to the shape of the tip input portion 10a such as a pen tip (the core 2 may be crushed). There is a possibility that the position of the tip input portion 10a cannot be detected properly.
- the elastic modulus of the core 2 exceeds 10 GPa, the bending of the core 2 due to the pressure of the tip input portion 10a may be a gentle bend without being a sharp bend along the tip input portion 10a.
- the dimensions of the core 2 are set, for example, within a range of 5 to 100 ⁇ m in thickness and within a range of 5 to 500 ⁇ m in width.
- the elastic modulus of the over clad layer 3 is preferably in the range of 0.1 MPa to less than 10 GPa, more preferably in the range of 1 MPa to less than 5 GPa. If the elastic modulus of the over clad layer 3 is less than 0.1 MPa, it is too soft and may be damaged by the pressure of the tip input portion 10a due to the shape of the tip input portion 10a such as a pen tip, protecting the core 2 Can not do. On the other hand, when the elastic modulus of the over clad layer 3 is 10 GPa or more, the core 2 is crushed and the position of the tip input portion 10a is properly detected by the pressure of the tip input portion 10a and the hand 20 without being crushed. It may not be possible.
- the thickness of the over clad layer 3 is set within a range of 1 to 200 ⁇ m, for example.
- the elastic modulus of the under cladding layer 1 is preferably in the range of 0.1 MPa to 1 GPa, more preferably in the range of 1 MPa to 100 MPa.
- the elastic modulus of the under clad layer 1 is less than 0.1 MPa, the under clad layer 1 is too soft and may not be continuously performed after being pressed by the tip input portion 10a such as a pen tip and not returned to the original state.
- the elastic modulus of the underclad layer 1 exceeds 1 GPa, the core 2 is crushed and the position of the tip input portion 10a cannot be detected properly even if the tip input portion 10a or the pressure of the hand 20 is crushed. There is a fear.
- the thickness of the under-cladding layer 1 is set within a range of 20 to 2000 ⁇ m, for example.
- Examples of the material for forming the core 2, the under cladding layer 1 and the over cladding layer 3 include a photosensitive resin and a thermosetting resin, and the optical waveguide W can be manufactured by a manufacturing method corresponding to the forming material.
- the refractive index of the core 2 is set larger than the refractive indexes of the under cladding layer 1 and the over cladding layer 3.
- the elastic modulus and refractive index can be adjusted by, for example, selecting the type of each forming material and adjusting the composition ratio.
- a rubber sheet may be used as the undercladding layer 1 and the cores 2 may be formed in a lattice shape on the rubber sheet.
- an elastic layer such as a rubber layer may be provided on the back surface of the under cladding layer 1.
- the elastic force of the elastic layer is utilized.
- the weak restoring force is assisted, and after the pressing by the distal end input portion 10a of the input body 10 is released, the original state can be restored.
- Component A 30 parts by weight of epoxy resin (Epogosei PT, Yokkaichi Gosei Co., Ltd.).
- Component B 70 parts by weight of an epoxy resin (manufactured by Daicel, EHPE3150).
- Component C 4 parts by weight of a photoacid generator (manufactured by Sun Apro, CPI 200K).
- Component D 100 parts by weight of ethyl lactate (Wako Pure Chemical Industries, Ltd.). By mixing these components A to D, an over clad layer forming material was prepared.
- Component E 80 parts by weight of an epoxy resin (manufactured by Daicel, EHPE3150).
- Component F 20 parts by weight of an epoxy resin (manufactured by Nippon Steel Chemical Co., Ltd., YDCN700-10).
- Component G 1 part by weight of a photoacid generator (manufactured by ADEKA, SP170).
- Component H 50 parts by weight of ethyl lactate (manufactured by Wako Pure Chemical Industries, Ltd.)
- a core forming material was prepared by mixing these components E to H.
- Component I 75 parts by weight of an epoxy resin (Epogosei PT, manufactured by Yokkaichi Gosei Co., Ltd.)
- Component J 25 parts by weight of an epoxy resin (manufactured by Mitsubishi Chemical Corporation, JER1007).
- Component K 4 parts by weight of a photoacid generator (manufactured by Sun Apro, CPI 200K).
- Component L 50 parts by weight of ethyl lactate (manufactured by Wako Pure Chemical Industries, Ltd.) By mixing these components I to L, a material for forming the underclad layer was prepared.
- An over clad layer was formed on the surface of the glass substrate by spin coating using the over clad layer forming material.
- the over cladding layer had a thickness of 5 ⁇ m, an elastic modulus of 1.2 GPa, and a refractive index of 1.503.
- a core was formed on the surface of the over clad layer by photolithography using the core forming material.
- the thickness of the core was 30 ⁇ m
- the core width of the lattice-like portion was 100 ⁇ m
- the pitch was 600 ⁇ m
- the elastic modulus was 3 GPa
- the refractive index was 1.523.
- an under clad layer was formed on the surface of the over clad layer by spin coating using the under clad layer forming material so as to cover the core.
- the thickness of the under cladding layer was 200 ⁇ m, the elastic modulus was 3 MPa, and the refractive index was 1.503.
- Component P 30 parts by weight of an epoxy resin (Epogosei PT, manufactured by Yokkaichi Gosei Co., Ltd.)
- Component Q 70 parts by weight of epoxy resin (manufactured by DIC, EXA-4816).
- Component R 4 weight part of photo-acid generators (made by ADEKA, SP170). The core forming material was prepared by mixing these components P to R.
- Component S 40 parts by weight of an epoxy resin (Epogosei PT, manufactured by Yokkaichi Gosei Co., Ltd.)
- Component T 60 weight part of epoxy resins (Daicel, 2021P).
- Component U 4 parts by weight of a photoacid generator (ADEKA, SP170).
- a light emitting element (Optowell, XH85-S0603-2s) is connected to one end face of the core of each optical waveguide of the above examples and comparative examples, and a light receiving element (Hamamatsu Photonics, s10226) is connected to the other end face of the core.
- the position sensors of Examples and Comparative Examples were manufactured.
- the attenuation rate when the pen tip was pressed was 80%, and the attenuation rate when the index finger was pressed was 0%.
- the attenuation rate when the pen tip was pressed was 60%, and the attenuation rate when the index finger was pressed was 50%.
- the position sensor of the embodiment since the light detection level at the light receiving element decreases when the pen tip is pressed and does not decrease when the index finger is pressed, only the position of the pen tip can be detected. It is the same as the state where it is not pressed, and it can be seen that it is not sensed.
- the position sensor of the comparative example the light detection level at the light receiving element is reduced to the same extent both when the pen tip is pressed and when the index finger is pressed. It can be seen that.
- the position sensor of the present invention detects only the position and movement locus of the tip input unit such as a necessary pen tip when inputting a character or the like while holding an input body such as a pen, etc. It can be used to prevent detection.
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Abstract
Description
成分A:エポキシ樹脂(四日市合成社製、エポゴーセーPT)30重量部。
成分B:エポキシ樹脂(ダイセル社製、EHPE3150)70重量部。
成分C:光酸発生剤(サンアプロ社製、CPI200K)4重量部。
成分D:乳酸エチル(和光純薬社製)100重量部。
これら成分A~Dを混合することにより、オーバークラッド層の形成材料を調製した。
成分E:エポキシ樹脂(ダイセル社製、EHPE3150)80重量部。
成分F:エポキシ樹脂(新日鉄化学社製、YDCN700-10)20重量部。
成分G:光酸発生剤(ADEKA社製、SP170)1重量部。
成分H:乳酸エチル(和光純薬社製)50重量部。
これら成分E~Hを混合することにより、コアの形成材料を調製した。
成分I:エポキシ樹脂(四日市合成社製、エポゴーセーPT)75重量部。
成分J:エポキシ樹脂(三菱化学社製、JER1007)25重量部。
成分K:光酸発生剤(サンアプロ社製、CPI200K)4重量部。
成分L:乳酸エチル(和光純薬社製)50重量部。
これら成分I~Lを混合することにより、アンダークラッド層の形成材料を調製した。
ガラス製基材の表面に、上記オーバークラッド層の形成材料を用いて、スピンコート法により、オーバークラッド層を形成した。このオーバークラッド層の厚みは5μm、弾性率は1.2GPa、屈折率は1.503であった。
〔オーバークラッド層の形成材料〕
成分M:エポキシ樹脂(四日市合成社製、エポゴーセーPT)40重量部。
成分N:エポキシ樹脂(ダイセル社製、2021P)60重量部。
成分O:光酸発生剤(ADEKA社製、SP170)4重量部。
これら成分M~Oを混合することにより、オーバークラッド層の形成材料を調製した。
成分P:エポキシ樹脂(四日市合成社製、エポゴーセーPT)30重量部。
成分Q:エポキシ樹脂(DIC社製、EXA-4816)70重量部。
成分R:光酸発生剤(ADEKA社製、SP170)4重量部。
これら成分P~Rを混合することにより、コアの形成材料を調製した。
成分S:エポキシ樹脂(四日市合成社製、エポゴーセーPT)40重量部。
成分T:エポキシ樹脂(ダイセル社製、2021P)60重量部。
成分U:光酸発生剤(ADEKA社製、SP170)4重量部。
これら成分S~Uを混合することにより、アンダークラッド層の形成材料を調製した。
上記実施例と同様にして、同寸法の光導波路を作製した。ただし、弾性率は、オーバークラッド層が1GPa、コアが25MPa、アンダークラッド層が1GPaであった。また、屈折率は、オーバークラッド層が1.504、コアが1.532、アンダークラッド層が1.504であった。
上記実施例および比較例の各光導波路のコアの一端面に、発光素子(Optowell社製、XH85-S0603-2s )を接続し、コアの他端面に、受光素子(浜松ホトニクス社製、s10226)を接続し、実施例および比較例の各位置センサを作製した。
上記各位置センサの表面に、ボールペンのペン先(曲率半径350μm)を荷重1.47Nで押圧し、人の人指し指(曲率半径1cm)を荷重19.6Nで押圧した。そして、上記受光素子での光の検出レベル(受光量)を、上記荷重をかけない場合と、かけた場合とで測定し、その減衰率を下記の式(3)にしたがって算出した。
W 光導波路
1 アンダークラッド層
2 コア
3 オーバークラッド層
4 発光素子
5 受光素子
Claims (1)
- シート状のアンダークラッド層の表面に、複数の線状のコアを格子状に配置形成し、これらコアを被覆した状態でオーバークラッド層をシート状に形成したシート状の光導波路と、上記コアの一端面に接続される発光素子と、上記コアの他端面に接続される受光素子とを備え、それ自体の表面の任意の個所への押圧による、コアの光伝播量の変化によって、押圧個所を特定するシート状の位置センサであって、上記位置センサへの押圧が、入力体の、曲率半径R(単位:μm)の先端入力部による押圧であり、その曲率半径Rと、コアの厚みT(単位:μm)との比A(=R/T)を用いると、上記コアと上記アンダークラッド層および上記オーバークラッド層との間の屈折率差Δが、下記の式(1)で示される最大値Δmax と、下記の式(2)で示される最小値Δmin との間に設定されており、上記コアの弾性率が、上記アンダークラッド層の弾性率および上記オーバークラッド層の弾性率よりも大きく設定され、上記シート状の光導波路の表面の押圧状態で、その押圧方向のコアの断面の変形率が、オーバークラッド層およびアンダークラッド層の断面の変形率よりも小さくなるようになっていることを特徴とする位置センサ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020157022757A KR20150123808A (ko) | 2013-03-06 | 2014-01-14 | 위치 센서 |
EP14759658.9A EP2950189A1 (en) | 2013-03-06 | 2014-01-14 | Position sensor |
US14/772,186 US20160018950A1 (en) | 2013-03-06 | 2014-01-14 | Position sensor |
CN201480010061.4A CN105074638A (zh) | 2013-03-06 | 2014-01-14 | 位置传感器 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2013044072 | 2013-03-06 | ||
JP2013-044072 | 2013-03-06 | ||
JP2013087944A JP2014197367A (ja) | 2013-03-06 | 2013-04-19 | 位置センサ |
JP2013-087944 | 2013-04-19 |
Publications (1)
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WO2014136472A1 true WO2014136472A1 (ja) | 2014-09-12 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2014/050401 WO2014136472A1 (ja) | 2013-03-06 | 2014-01-14 | 位置センサ |
Country Status (7)
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US (1) | US20160018950A1 (ja) |
EP (1) | EP2950189A1 (ja) |
JP (1) | JP2014197367A (ja) |
KR (1) | KR20150123808A (ja) |
CN (1) | CN105074638A (ja) |
TW (1) | TW201439860A (ja) |
WO (1) | WO2014136472A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2804081A4 (en) * | 2013-03-08 | 2015-11-25 | Nitto Denko Corp | ELECTRONIC UNDERCOAT |
EP2799965A4 (en) * | 2013-03-08 | 2015-11-25 | Nitto Denko Corp | INFORMATION MANAGEMENT SYSTEM |
US9213442B2 (en) | 2013-03-08 | 2015-12-15 | Nitto Denko Corporation | Electronic underlay with wireless transmission function |
US9811211B2 (en) | 2013-03-06 | 2017-11-07 | Nitto Denko Corporation | Position sensor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US10379617B2 (en) * | 2016-12-07 | 2019-08-13 | Lg Display Co., Ltd. | Touch sensitive element and display device comprising the same |
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JP2001222378A (ja) * | 2000-02-10 | 2001-08-17 | Nec Saitama Ltd | タッチパネル入力装置 |
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JP4847389B2 (ja) * | 2007-04-11 | 2011-12-28 | 日東電工株式会社 | タッチパネル用光導波路およびそれを用いたタッチパネル |
JP2012043099A (ja) * | 2010-08-17 | 2012-03-01 | Nitto Denko Corp | 光学式タッチパネル |
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2013
- 2013-04-19 JP JP2013087944A patent/JP2014197367A/ja not_active Withdrawn
-
2014
- 2014-01-14 EP EP14759658.9A patent/EP2950189A1/en not_active Withdrawn
- 2014-01-14 CN CN201480010061.4A patent/CN105074638A/zh active Pending
- 2014-01-14 US US14/772,186 patent/US20160018950A1/en not_active Abandoned
- 2014-01-14 WO PCT/JP2014/050401 patent/WO2014136472A1/ja active Application Filing
- 2014-01-14 KR KR1020157022757A patent/KR20150123808A/ko not_active Application Discontinuation
- 2014-01-14 TW TW103101262A patent/TW201439860A/zh unknown
Patent Citations (5)
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JPH01172916A (ja) * | 1987-12-28 | 1989-07-07 | Nok Corp | 光スイッチ |
JPH08234895A (ja) | 1995-02-27 | 1996-09-13 | Canon Inc | 座標入力方法及びその装置 |
JPH1049285A (ja) * | 1996-08-06 | 1998-02-20 | Hitachi Ltd | タブレット |
JP2001222378A (ja) * | 2000-02-10 | 2001-08-17 | Nec Saitama Ltd | タッチパネル入力装置 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9811211B2 (en) | 2013-03-06 | 2017-11-07 | Nitto Denko Corporation | Position sensor |
EP2804081A4 (en) * | 2013-03-08 | 2015-11-25 | Nitto Denko Corp | ELECTRONIC UNDERCOAT |
EP2799965A4 (en) * | 2013-03-08 | 2015-11-25 | Nitto Denko Corp | INFORMATION MANAGEMENT SYSTEM |
US9213442B2 (en) | 2013-03-08 | 2015-12-15 | Nitto Denko Corporation | Electronic underlay with wireless transmission function |
US9239641B2 (en) | 2013-03-08 | 2016-01-19 | Nitto Denko Corporation | Electronic underlay |
US9250724B2 (en) | 2013-03-08 | 2016-02-02 | Nitto Denko Corporation | Information management system |
Also Published As
Publication number | Publication date |
---|---|
TW201439860A (zh) | 2014-10-16 |
KR20150123808A (ko) | 2015-11-04 |
JP2014197367A (ja) | 2014-10-16 |
EP2950189A1 (en) | 2015-12-02 |
CN105074638A (zh) | 2015-11-18 |
US20160018950A1 (en) | 2016-01-21 |
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