WO2010013679A1 - 面状体及びタッチスイッチ - Google Patents
面状体及びタッチスイッチ Download PDFInfo
- Publication number
- WO2010013679A1 WO2010013679A1 PCT/JP2009/063355 JP2009063355W WO2010013679A1 WO 2010013679 A1 WO2010013679 A1 WO 2010013679A1 JP 2009063355 W JP2009063355 W JP 2009063355W WO 2010013679 A1 WO2010013679 A1 WO 2010013679A1
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- WIPO (PCT)
- Prior art keywords
- electrode
- substrate
- line
- electrodes
- touch switch
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
- H03K17/9622—Capacitive touch switches using a plurality of detectors, e.g. keyboard
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
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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
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
-
- 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
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
Definitions
- the present invention relates to a planar body and a touch switch.
- a touch switch is arranged on the front surface of the display to detect the touch position.
- the types of touch switches there are a resistance film type, a surface acoustic wave type, an infrared type, and the like, and there is also a capacitance type that detects a position by a change in capacitance due to a finger touch or proximity.
- Patent Document 1 describes a capacitive touch switch having matrix-like electrodes (two-layer structure in the X direction and Y direction) as shown in FIGS. 19 and 20.
- a conventional capacitive touch switch 400 includes: A first planar body 403 in which a transparent first electrode 402 made of ITO or the like patterned in a strip shape is formed on one surface of the substrate 401, and a transparent material made of ITO or the like patterned in a strip shape on one surface of the substrate 404. A second planar body 406 having a second electrode 405 formed thereon, and the first planar body 403 and the second planar body 406 are opposed to each other. In this manner, the adhesive layer 407 is attached.
- the electrodes 402 and 405 detect a change in voltage or the like based on the capacitance of the human body at the contact position, whereby the coordinates of the contact position are calculated.
- the resistivity of ITO is high, and is generally 200 ⁇ / ⁇ to 1000 ⁇ / ⁇ . For this reason, the size of the touch switch is increased, the inter-terminal resistance value of the electrode is increased, and accordingly, the sensitivity of capacitance detection is lowered, and it becomes difficult to operate as a touch switch.
- Patent Document 2 discloses a capacitive touch switch that does not use ITO. By forming an electrode made of copper or a copper alloy in a mesh shape, the transmittance of the electrode is set to 70% or more, and a low-resistance electrode that maintains visibility is formed.
- the electrode of Patent Document 2 is only one surface of the substrate, and when it is formed of two layers of electrodes, the first electrode and the second electrode, as described in Patent Document 1, the first planar body and When the second planar bodies are overlaid, the visibility decreases.
- An object of the present invention is to provide a touch switch having good visibility in a touch switch in which two layers of electrodes not using ITO are bonded, and a planar body constituting such a touch switch.
- the above object of the present invention is a planar body provided on one surface of a substrate with a mesh electrode formed in a mesh shape by a plurality of conductor wires, and the mesh electrode is a plurality of electrodes arranged at intervals.
- the conductive part region is partitioned into a conductive part region and a non-conductive part region disposed between the conductive part regions, and the non-conductive part region includes a plurality of cutting parts for cutting the conductor wire,
- the non-conductive portion region is achieved by a planar body that insulates between the adjacent conductive portion regions by the cut portion.
- the cutting portion is formed at an intersection of the mesh electrode.
- the mesh pitch of the mesh electrode is preferably 100 ⁇ m to 1000 ⁇ m.
- the conductive part region includes a plurality of cutting parts that cut the conductor wire in a range that does not hinder the conductivity between both end parts.
- a capacitive touch switch that includes a plurality of the above-mentioned planar bodies, and each planar body is bonded via an adhesive layer.
- the conductive part region in one planar body and the conductive part region in the other planar body are arranged so as to be orthogonal to each other.
- the object of the present invention is to provide a substrate, a plurality of first electrodes formed on one surface of the substrate and arranged at regular intervals, and formed on the other surface of the substrate and arranged at regular intervals.
- a plurality of second electrodes that form a grid with the first electrode, and the first electrode and the second electrode each form a mesh with a plurality of conductor lines, and the direction of the conductor lines is the black matrix of the display This is achieved by a touch switch that is oblique to the direction.
- a conductor line of the first electrode comprising: a first auxiliary line formed between the first electrodes on the one surface; and a second auxiliary line formed between the second electrodes on the other surface.
- the first auxiliary line, the conductor line of the second electrode, and the second auxiliary line form a single lattice shape with uniform spacing.
- the first electrode conductor line, the first auxiliary line, or both formed on one surface of the substrate is the second electrode conductor line, the second auxiliary line, or both formed on the other surface of the substrate. It is preferable that a single line is formed.
- the object of the present invention is to provide a first substrate, a second substrate facing the first substrate, and a plurality of the first substrates formed on a surface facing the second substrate and arranged at regular intervals.
- a plurality of second electrodes formed on a surface opposite to the first substrate, arranged at regular intervals, and in a lattice shape with the plurality of first electrodes,
- the first electrode and the second electrode each form a mesh by a plurality of conductor lines, and the direction of the conductor lines is achieved by a touch switch oblique to the black matrix of the display.
- the conductor line of the first electrode formed on the first substrate, the first auxiliary line, or both are the conductor line of the second electrode formed on the second substrate, the second auxiliary line, or both. It is preferable that one line is formed.
- a touch switch in which two layers of electrodes not using ITO are bonded together, it is possible to provide a touch switch with good visibility and a planar body constituting such a touch switch.
- FIG. 4 is a partially enlarged view of FIG. 3. It is a figure which shows the partial cross section of a touch switch. It is a figure which shows the partial cross section of a touch switch.
- FIG. 10 It is a figure which shows the electrode and auxiliary line of a touch switch, (a) shows a 1st electrode and a 1st auxiliary line, (b) shows a 2nd electrode and a 2nd auxiliary line. It is a figure which shows the positional relationship of the 1st electrode, 1st auxiliary line, 2nd electrode, and 2nd auxiliary line in FIG. It is a figure which shows the electrode used in order to perform a comparison with the electrode of a mesh shape, and the electrode of ITO. It is a schematic structure principal part sectional drawing of the touch switch which concerns on 2nd Embodiment of this invention. It is a top view of the 1st planar body which the touch switch shown in FIG. 10 has.
- FIG. 10 It is a top view of the 2nd planar body which the touch switch shown in FIG. 10 has.
- (A) is the principal part enlarged view of FIG. 11,
- (b) is the principal part enlarged view of FIG.
- FIG. 1 It is a top view which shows the modification of the planar body which concerns on this invention. It is a top view of the electrostatic capacitance type touch switch which has the conventional matrix electrode. It is a top view of the electrostatic capacitance type touch switch which has the conventional matrix electrode. It is a schematic plan view schematically showing a conventional capacitive touch switch. It is sectional drawing of FIG.
- the touch switch is a capacitive touch switch attached to the front surface of the display.
- the display is formed with a black matrix having a grid pattern in the vertical and horizontal directions.
- the touch switch 10 shown in FIG. 1 includes a substrate 12, a first electrode 14 formed on one surface of the substrate 12, and a second electrode 16 formed on the other surface of the substrate 12.
- a substrate 12 In the description, it is assumed that one surface of the substrate 12 is upward, the other surface of the substrate 12 is downward, and the other surface of the substrate 12 is a surface to be attached to the display 18.
- the substrate 12 is a dielectric substrate.
- the material of the substrate 12 include transparent materials such as glass, polyester, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and polyethylene naphthalate.
- the thickness is about 0.1 to 2 mm, and for plastic film, the thickness is about 10 to 2000 ⁇ m.
- the first electrode 14 and the second electrode 16 are arranged at regular intervals.
- the first electrode 14 and the second electrode 16 are oriented in directions orthogonal to each other, and the first electrode 14 and the second electrode 16 form a lattice shape as shown in FIG.
- the first electrode 14 and the second electrode 16 each have a plurality of conductor wires, and a mesh is formed by the conductor wires.
- the conductor lines are the long lines 20a and 20b and a plurality of short lines 22a and 22b intersecting the long lines 20a and 20b.
- the long lines 20a and 20b and the short lines 22a and 22b are directed obliquely with respect to the black matrix of the display 18, respectively. This is because moire tends to occur when the conductor lines and the black matrix are oriented in the same direction.
- the long lines 20a and 20b meander at regular lengths, and the angles of the meandered portions are the same.
- the meandering angle is an angle (bias angle) at which moire does not occur with respect to the vertical axis or horizontal axis of the display 18.
- the long line 20a of the first electrode 14 and the short line 22b of the second electrode 16 face the same direction, and the short line 22a of the first electrode 14 and the long line 20b of the second electrode 16 face the same direction.
- the line widths of the long lines 20a and 20b and the short lines 22a and 22b are, for example, about 10 to 30 ⁇ m.
- the pitch of the long lines 20a and 20b is about 200 to 400 ⁇ m. Since the line width is very thin and the pitch is sufficient with respect to the line width, the electrodes 14 and 16 do not stand out and the display quality of the display 18 is unlikely to deteriorate.
- the first electrode 14 and the second electrode 16 form a rhombus as shown in FIG.
- the lattice shape is a lattice shape in which diamonds are formed instead of squares.
- the angle at which the long lines 20a and 20b meander are appropriately selected depending on the size of the display 18 and the like. By meandering, no conductor wire is formed in the same direction as the black matrix. As a result, a first auxiliary line 24 and a second auxiliary line 26 described later are also inclined with respect to the black matrix.
- the volume resistance value of the electrodes constituting the first electrode 14 and the second electrode 16 is 0.5 ⁇ 10 ⁇ 5 to 5 ⁇ 10 ⁇ 5 ⁇ ⁇ cm, which is lower than that of ITO. Further, the volume resistance value, the line width, and the height are adjusted so that the inter-terminal resistance value of the electrodes 16x and 14y is 5 k ⁇ or less, preferably 1 k ⁇ or less.
- the distance between the short lines 22a and 22b is made larger than the distance between the long lines 20a and 20b.
- the second electrode 16 is disposed between the short lines 22a of the first electrode 14. Further, the first electrode 14 is arranged between the short lines 22 b of the second electrode 16.
- the short wires 22a of the first electrode 14 and the long wires 20b of the second electrode 16 are arranged so that the conductor wires are arranged at equal intervals.
- the long wire 20a of the first electrode 14 and the short wire 22b of the second electrode 16 are arranged such that their conductor lines are arranged at equal intervals. Since the short wire 22a of the first electrode 14 and the second electrode 16 do not overlap, moire does not occur. Further, since the short line 22b of the second electrode 16 and the first electrode do not overlap, moire does not occur.
- the first electrode 14 and the second electrode 16 are formed by printing with ink containing conductive nanoparticles.
- the conductive nanoparticles include silver, gold, platinum, palladium, copper, carbon, or mixtures thereof.
- the average particle size of the nanoparticles is 2 ⁇ m or less, preferably 200 to 500 nm, and the particle size is smaller than that of conventional micron particles. Even when the line width of the electrodes 14 and 16 is 100 ⁇ m or less, the particle diameter of the nanoparticles is sufficiently smaller than the line width of the electrodes 14 and 16, so that the conductive electrodes 14 and 16 can be formed.
- the ink binder include polyester resin.
- the amount of the binder used is 1 to 20 parts by weight, preferably 3 to 10 parts by weight, based on 100 parts by weight of the conductive nanoparticles.
- the solvent for the ink those that disperse the conductive nanoparticles well are preferable, and a solvent having a boiling point of about 100 to 300 ° C., for example, toluene having a boiling point of 110 ° C. can be mentioned. Since the boiling point of the solvent is relatively low, the ink can be baked at a relatively low temperature after printing on the substrate 12, and the thermal load on the substrate 12 can be reduced. The ink is dispersed for the nanoparticles.
- ITO containing indium which is a rare element is not used. The cost of the electrode material can be reduced.
- first auxiliary lines 24 and a plurality of second auxiliary lines 26 are provided.
- the first auxiliary line 24 is formed on one surface of the substrate 12, and the second auxiliary line 26 is formed on the other surface of the substrate 12.
- the first auxiliary line 24 is formed between the first electrodes 14, and the second auxiliary line 26 is formed between the second electrodes 16.
- the material of the first auxiliary line 24 and the second auxiliary line 26 is the same as that of the first electrode 14 and the like.
- the first auxiliary line 24 and the second auxiliary line 26 are not connected to the first electrode 14 or the second electrode 16.
- FIG. 4 shows an enlarged view of the electrodes 14 and 16 and the auxiliary lines 24 and 26.
- the white portion is the first electrode 14 and the first auxiliary line 24 formed on one surface of the substrate 12, and the black portion is the second electrode 16 and the second auxiliary line 26 formed on the other surface of the substrate 12. It is.
- the first auxiliary line 24 faces in the same direction as the short line 22b of the second electrode 16, and has the same length as the interval d2 between the second electrodes 16.
- the second auxiliary line 26 faces in the same direction as the short line 20a of the first electrode 14, and has the same length as the interval d1 between the first electrodes 14.
- the first auxiliary line 24 and the second auxiliary line 26 intersect at their centers.
- the first auxiliary line 24 and the short line 22b of the second electrode 16 form a single line.
- the first auxiliary line 24 is formed on one surface
- the short line 22b of the second electrode 16 is formed on the other surface and is not in contact with the first electrode 24, but is arranged so as to be linear.
- the second auxiliary line 26 and the short line 22a of the first electrode 14 are arranged so as to be linear.
- the long line 20 a of the first electrode 14, the first auxiliary line 24, and the short line 22 b of the second electrode 16 are arranged at equal intervals
- the long line 20 b of the second electrode 16, the second auxiliary line 26, and the short line 22 a of the first electrode 14. Are arranged at equal intervals.
- a lattice can be formed by the first electrode 14 or the like. Although it is a single line as described above, it is meandering so that a lattice shape can be formed together with the electrodes 14 and 16.
- One lattice shape is formed by the first electrode 14 and the second electrode 16 formed on the two surfaces, and the two lattice shapes are not superimposed and do not look like one lattice shape.
- moire is generated if they are slightly shifted. However, according to the present invention, generation of moire can be prevented.
- the cover film 30 is adhered to one side of the substrate 12 using an acrylic transparent adhesive 28.
- the first electrode 14 and the first auxiliary line 24 are protected by the cover film 30.
- a transparent resin may be coated.
- the other surface side of the substrate 12 is adhered to the surface of the display 18 using an acrylic transparent adhesive 32.
- Terminals 14y and 16x are provided at the ends of the electrodes 14 and 16, and lead wires (not shown) are connected from the terminals 14y and 16x.
- the lead-out wiring is connected to a control circuit that detects voltage application and touch position to the electrodes 14 and 16. The touch position is detected by applying a predetermined voltage to the electrodes 14 and 16 and detecting an electrical change when the finger is brought close to the touch switch 10.
- a method for manufacturing the touch switch 10 will be described.
- (1) Prepare the above-described substrate 12 and ink.
- the substrate 12 is cut into a desired shape and washed as necessary.
- (2) The first electrode 14 and the first auxiliary line 24 are formed by printing ink on one surface of the substrate 12.
- (3) The second electrode 16 and the second auxiliary line 26 are formed by printing ink on the other surface of the substrate 12.
- An acrylic transparent adhesive 28 is applied to one side of the substrate 12 and the cover film 30 is adhered to the one side of the substrate 12.
- the ink (2) and (3) are printed by screen printing or inkjet printing. Just by screen printing or ink jet printing, the specific resistance of the ink is high and there is no electrical conductivity. After printing, the ink is made conductive by baking the ink in a drying oven. The vacuum film formation and etching necessary for the production of ITO are not required, and the electrodes 14 and 16 can be generated very easily.
- lead wires are formed from the ends of the electrodes 14 and 16 with silver ink or the like, and the electrodes 14 and 16 are connected to the control circuit of the touch switch via the lead wires. If the lead lines are formed by screen printing or the like using the same ink as the electrodes, the lead lines can be formed when the electrodes 14 and 16 are formed.
- the completed touch switch 10 is attached to the front surface of the display 18 using an acrylic transparent adhesive 32 or the like. If necessary, alignment marks are provided at corners of the substrate 12 and the display 18 to perform alignment.
- the 5 includes a first substrate 12a, a second substrate 12b facing the first substrate 12a, a plurality of first electrodes 14 formed on one surface of the first substrate 12a, and a second substrate 12b.
- a plurality of second electrodes 16 formed on one surface.
- One surface of the first substrate 12a faces the other surface of the second substrate 12b.
- One surface of the second substrate 12 b is a surface attached to the display 18.
- the first electrode 14 and the second electrode 16 are the same as those shown in FIGS. 2 to 4, and are mesh-like electrodes composed of long lines 20a and 20b and short lines 22a and 22b.
- the materials of the substrates 12a and 12b and the electrodes 14 and 16 are the same as those of the touch switch 10 described above.
- the first auxiliary line 24 is formed on one surface of the first substrate 12a, and the second auxiliary line 26 is formed on one surface of the second substrate 12b.
- the first auxiliary line 24 is formed between the first electrodes 14, and the second auxiliary line 26 is formed between the second electrodes 16.
- the first auxiliary line 24 faces in the same direction as the short line 22b of the second electrode 16, and has the same length as the interval d2 between the second electrodes 16.
- the second auxiliary line 26 faces the same direction as the short line 22a of the first electrode 14, and has the same length as the interval d1 between the first electrodes 14.
- the material of the first auxiliary line 24 and the second auxiliary line 26 is the same as that of the first electrode 14 and the like.
- the first auxiliary line 24 and the short line 22b of the second electrode 16 are in a single line. They are non-contact with each other, but are apparently linear. Similarly, the second auxiliary line 26 and the short line 20a of the first electrode 14 have a single line shape.
- the first substrate 12a and the second substrate 12b are bonded using a transparent acrylic transparent adhesive 34 or the like.
- the second substrate 12b and the second electrode 16 are bonded to the display 18 using a transparent acrylic transparent adhesive 36 or the like.
- lead wires (not shown) are connected to the terminals 14 y and 16 x of the electrodes 14 and 16.
- the lead-out wiring is connected to a control circuit that detects voltage application and touch position to the electrodes 14 and 16.
- the touch position is detected by applying a predetermined voltage to the electrodes 14 and 16 and detecting an electrical change when the finger is brought close to the touch switch 10b.
- a method for manufacturing the touch switch 10b will be described.
- (1) Prepare the above-described substrates 12a and 12b and ink.
- the substrates 12a and 12b are cut into a desired shape and washed as necessary.
- (2) The first electrode 14 and the first auxiliary line 24 are formed by printing ink on one surface of the first substrate 12a.
- the second electrode 16 and the second auxiliary line 26 are formed by printing ink on one surface of the second substrate 12b.
- the first substrate 12a and the second substrate 12b are bonded with an acrylic transparent adhesive 34 so that the other surface side of the second substrate 12b is disposed on the one surface side of the first substrate 12a.
- the completed touch switch 10b is attached to the front surface of the display 18 using an acrylic transparent adhesive 36 or the like.
- the touch switches 10 and 10b of the present invention form the auxiliary lines 24 and 26 between the electrodes 14 and 16.
- a lattice shape with a uniform interval is formed by these electrodes 14 and the like, and moire is less likely to appear.
- a grid-like electrode is not formed on only one surface as in Patent Document 2, but a grid is formed on both sides of the substrate. Even if the positional accuracy of the electrode 14 or the like is lowered, moire is hardly expressed, and the manufacturing yield can be improved.
- the display 18 may be regarded as a first substrate, and the first electrode 14 and the first auxiliary line 24 may be formed on the surface of the display 18 (FIG. 6).
- the second electrode 16 and the second auxiliary line 26 are formed on one surface of the second substrate 12 c, and the other surface of the second substrate 12 c is bonded to the display 18 with an acrylic transparent adhesive 38.
- the cover film 30 is bonded to one surface of the second substrate 12c with an acrylic transparent adhesive 28 to protect the second electrode 16 and the second auxiliary line 26.
- the first electrode 14, the first auxiliary line 24, the second electrode 16, the second auxiliary line 26, the second substrate 12c, and the like have the same configuration as in the above embodiment.
- a first electrode 14b and a second electrode 16b in which a plurality of mesh shapes are connected may be used.
- the first electrode 14b and the second electrode 16b are arranged at equal intervals.
- a first auxiliary line 24b connected to the first electrode 14b is provided between the first electrodes.
- a second auxiliary line 26b connected to the second electrode 16b is provided between the second electrodes.
- a first electrode 14b, a second electrode 16b, and the like are provided on one surface and the other surface of the substrate 12 of FIG. 1 or the first substrate 12a and the second substrate 12b of FIG.
- electrodes 16x and 14y are connected directly or indirectly to the ends of the first electrode 14b and the second electrode 16b. As shown in FIGS. 7 and 8, if one lattice shape is formed and the lines constituting the lattice shape are inclined with respect to the black matrix, moire is less likely to occur.
- the conductor lines and the auxiliary lines have an inclination of 45 degrees with respect to the black matrix.
- the structure of the electrodes 14 and 16 and the auxiliary lines 24 and 26 described with reference to FIG. 2 is an example.
- the conductor lines are inclined with respect to the black matrix of the display.
- One grid shape is formed via the substrate 12 between the two sides or the conductor wires formed on the two substrates 12a and 12b, and (3) a conductor wire when forming one grid shape. It is important that they do not overlap even if they intersect.
- the electrode e shown in FIG. 9 was formed of ITO and a reticulated silver electrode.
- the electrode e has a width of 3 mm and a length of 30 cm.
- the inter-pattern resistance of the electrode e was about 30 k ⁇ , and in the case of the silver electrode, it was about 52 ⁇ .
- the sensitivity of the seventh electrode e from the top was compared.
- a change in capacitance was also detected from the terminal y by applying a predetermined voltage from the terminal y at the left end of the electrode e. At the point O of 0 cm from the terminal y, there is almost no difference in sensitivity.
- the sensitivity of the ITO electrode was 1/3 compared to the mesh silver electrode, and at the point Q of 30 cm, the sensitivity was 1/5.
- the change in sensitivity of the mesh-like silver electrode from point O to Q was very small.
- the sensitivity is very small at the points P and Q of 15 cm and 30 cm.
- the touch switch of the present invention can be easily increased in size as compared with the case where the ITO electrode is used.
- FIG. 10 is an enlarged cross-sectional view of the main components of the touch switch according to the second embodiment of the present invention.
- This touch switch 105 is a capacitive touch switch, and as shown in FIGS. 11 and 12, a first planar body 101 in which a mesh electrode 112 is formed on one surface of a substrate 111, and a substrate 121. And a second planar body 102 having a mesh electrode 122 formed on one surface thereof.
- FIG. 11 is a plan view of the first planar body 101
- FIG. 12 is a plan view of the second planar body 102.
- the first planar body 101 and the second planar body 102 are bonded and integrated through the adhesive layer 103 so that the mesh electrodes 112 and 122 face each other.
- the first planar body 101 and the second planar body 102 are such that a conductive portion area 112a of the first planar body 101 described later and a conductive section region 122a of the second planar body 102 are orthogonal to each other. It is affixed to.
- the substrates 111 and 121 are dielectric substrates.
- the material of the substrates 111 and 121 include transparent materials such as glass, polyester, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and polyethylene naphthalate.
- the thickness is preferably about 0.1 to 3 mm, and for plastic film, the thickness is preferably about 10 to 2000 ⁇ m. Further, these materials may be laminated in multiple layers.
- FIGS. 11 and 12 and FIGS. 13 (a) and 13 (b) which are enlarged views of main parts thereof, a mesh shape formed on one surface of the first planar body 101 and the second planar body 102, respectively.
- the electrodes 112 and 122 are electrodes formed by a plurality of conductor lines L in a mesh shape.
- Each mesh electrode 112, 122 includes a plurality of conductive part regions 112a, 122a arranged substantially in parallel with a predetermined interval, and non-conductive part regions 112b, 122b arranged between the conductive part regions. It is divided into. 14 is a configuration diagram showing a boundary between the conductive portion region 112a and the non-conductive portion region 112b of FIG. 11, and FIG. 15 is a configuration showing a boundary between the conductive portion region 122a and the non-conductive portion region 122b of FIG. FIG. In both figures, the portions colored in gray represent the conductive portion regions 112a and 122a.
- the conductive portion regions 112a and 122a are connected to an external drive circuit (not shown) through a routing circuit (not shown) made of conductive ink or the like.
- the non-conductive portion region 112b (122b) includes a plurality of cut portions 104 for cutting the conductor wire L into an island shape, and the non-conductive portion region 112b (122b) is adjacent to the conductive portion by the cut portion 104. It is configured to be able to insulate between regions.
- the cutting portion 104 is formed at the intersection of the plurality of conductor lines L forming the mesh electrodes 112 and 122.
- the cutting width of the cutting portion 104 is, for example, about the same as the line width of the conductor line L or about several times the line width of the conductor line L.
- the non-conductive portion regions 112b and 122b are provided with the cutting portions 104 for cutting the conductor lines L, it is possible to ensure insulation in the non-conductive portion regions 112b and 122b of the mesh electrodes 112 and 122.
- the touch switch 105 is configured by superimposing the first planar body 101 and the second planar body 102, the mesh electrode 112 on either the first planar body 101 or the second planar body 102.
- the non-conductive portion region 112b (122b) of (122) does not adversely affect the sensing of the mesh electrode 122 (112) of the other planar body, and stable capacitance detection is possible.
- the conductor line L has a line width of, for example, 10 to 30 ⁇ m. Further, the pitch of each conductor line L is formed to be 100 to 1000 ⁇ m.
- the thickness of the conductor line L is usually about 1 to 30 ⁇ m. From the viewpoint of making the pattern shape of the mesh electrodes 112 and 122 less noticeable and improving the visibility, the thickness of the conductor wire L is preferably as small as possible, but if it is too thin, the mesh electrodes 112 and 122 are necessary. Since it becomes difficult to obtain durability and weather resistance, the thickness is preferably about 10 to 30 ⁇ m. The mesh electrodes 112 and 122 having such dimensions are hardly noticeable because the line width of each conductor line L is very thin and the pitch with respect to the line width is sufficiently large.
- the method of forming the conductor wire L for forming the mesh electrodes 112 and 122 includes (i) a method of screen-printing a conductive paste containing extremely fine conductive particles on the transparent substrate 112 (see Japanese Patent Application Laid-Open No. 2007-142334, etc.) And (ii) a method in which a metal foil such as copper is laminated on the transparent substrate 112, a resist pattern is formed on the metal foil, and the metal foil is etched (see JP 2008-32884 A, etc.).
- the formation method of the conductor line L is not limited to the formation methods (i) and (ii). Printing methods other than the above (i), such as gravure printing, and photolithography other than the above (ii) may be used.
- the shape of the conductive part regions 112a and 122a in the mesh electrodes 112 and 122 is a configuration in which a plurality of rhombuses are connected in a straight line, and the rhombus in each of the conductive part regions 112a and 122a.
- the upper and lower rhomboid conductive section areas overlap. It is arranged so that it does not fit.
- the shape of the conductive portion regions 112a and 122a can be any shape such as a straight line as long as a contact point such as a finger can be detected.
- the adhesive layer 103 may be made of a general transparent adhesive such as epoxy or acrylic, and may include a core made of a norbornene resin transparent film.
- the thickness of the adhesive layer 103 is preferably 500 ⁇ m or less, for example.
- the adhesive layer 103 may be formed by overlapping a plurality of sheet-like adhesive materials, and further, a plurality of types of sheet-like adhesive materials may be overlapped.
- each mesh of the mesh electrode 122 in the second planar body 102 is arranged at the center of each mesh of the mesh electrode 112 in the first planar body 101, and the mesh electrode
- FIG. 17 is corresponded in the figure which affixed (a) and (b) of FIG.
- the touch switch 105 formed by sticking the first planar body 101 and the second planar body 102 is used by being attached to a display on which a black matrix is formed, for example.
- the mesh pattern of the conductive part regions 112a and 122a and the non-conductive part regions 112b and 122b is oblique with respect to the black matrix. This is to avoid moire when the black matrix and the mesh pattern are aligned in the same direction.
- the tilt angle is appropriately adjusted to an angle at which moiré is unlikely to occur in accordance with the display actually used.
- the touch position detection method is the same as that of the conventional electrostatic capacitance type touch switch, and a change in voltage or the like based on the electrostatic capacity of the human body at the contact position of the electrodes 12a and 22b. By detecting this, the coordinates of the contact position are calculated.
- the mesh electrodes 112 and 122 included in the first planar body 101 and the second planar body 102 are connected to the strip-shaped conductive portion regions 112a and 122a and the non-conductive portion regions 112b and 122b.
- the non-conductive portion regions 112b and 122b are configured to include a plurality of cut portions 104 that intermittently cut the conductor wire L, so that the non-conductive portion regions 112b and 122b can be electrically insulated. While ensuring, when the 1st planar body 101 and the 2nd planar body 102 are piled up, it can suppress effectively that the variation in a mesh density generate
- the mesh electrodes 112 and 122 according to the present embodiment can be formed by printing with ink containing a conductive material using a mask having a predetermined mask pattern.
- the dihedral body 102 can be efficiently manufactured.
- the concrete mode of the present invention is not limited to the above-mentioned embodiment.
- the cut portions 104 included in the non-conductive portion regions 112b and 122b in the mesh electrodes 112 and 122 are provided at the intersections of the plurality of conductor lines L.
- the cutting portion 104 may be provided anywhere as long as the insulating property at 122b is ensured, and the length thereof can be arbitrarily set.
- the non-conductive portion regions 112b and 122b are configured to include the cutting portion 104 that cuts the conductor line L.
- both end portions 221 and 222 321 and 322 as long as the electrical conductivity between the conductive portions 112a and 122a is not obstructed, the cutting portion 104a for cutting the conductor line L may be partially provided as shown in FIG. . With such a configuration, the visibility can be further improved.
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- Electronic Switches (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
Description
本発明の第1実施形態に係るタッチスイッチについて図面を用いて説明する。タッチスイッチは、ディスプレイの前面に取り付けられる静電容量式のタッチスイッチである。ディスプレイには、縦横に格子状となったブラックマトリクスが形成されている。
以下、本発明の第2実施形態について添付図面を参照して説明する。尚、各図面は、構成の理解を容易にするため、実寸比ではなく部分的に拡大又は縮小されている。
12,12a,12b,12c 基板
14,14b,16,16b 電極
18 ディスプレイ
20a,20b 長線(導体線)
22a,22b 短線(導体線)
24,24b,26,26b 補助線
28,32,34,36,38 アクリル系の透明接着剤
30 カバーフィルム
101 第1面状体
111 基板
112 網目状電極
112a 導電部領域
112b 非導電部領域
102 第2面状体
121 基板
122 網目状電極
122a 導電部領域
122b 非導電部領域
103 粘着層
104、104a 切断部
105 タッチスイッチ
L 導体線
Claims (12)
- 複数の導体線によって網目状に形成される網目状電極を基板の一方面に備える面状体であって、
前記網目状電極は、間隔をあけて配置される複数の導電部領域と、前記各導電部領域の間に配置される非導電部領域とに区画されており、
前記非導電部領域は、前記導体線を切断する複数の切断部を備えており、
前記切断部によって前記非導電部領域は、隣接する前記導電部領域間を絶縁する面状体。 - 前記切断部は、前記網目状電極の交差部に形成されている請求項1に記載の面状体。
- 前記網目状電極の網目ピッチは、100μm~1000μmである請求項1に記載の面状体。
- 前記導電部領域は、両端部間の導通性を阻害しない範囲で前記導体線を切断する切断部を備える請求項1に記載の面状体。
- 請求項1に記載の面状体を複数備え、
前記各面状体は、粘着層を介して貼着される静電容量式のタッチスイッチ。 - 一方の面状体における前記導電部領域と、他方の面状体における前記導電部領域とが、互いに直交するように配置されている請求項5に記載の静電容量式のタッチスイッチ。
- 基板と、
前記基板の一面に形成され、一定間隔で並べられた複数の第1電極と、
前記基板の他面に形成され、一定間隔で並べられ、前記複数の第1電極とで格子状になる複数の第2電極と、を備え、ディスプレイの前面に取り付けられるタッチスイッチであって、
前記第1電極と第2電極がそれぞれ複数の導体線によって網目を形成しており、導体線の方向がディスプレイのブラックマトリクスに対して斜め方向であるタッチスイッチ。 - 前記一面において、第1電極同士の間に形成された第1補助線と、
前記他面において、第2電極同士の間に形成された第2補助線と、を備え、
前記第1電極の導体線、第1補助線、第2電極の導体線、第2補助線によって線の間隔が均等な1つの格子形状を形成した請求項7のタッチスイッチ。 - 前記基板の一面に形成された第1電極の導体線、第1補助線、またはその両方は、基板の他面に形成された第2電極の導体線、第2補助線、またはその両方とで1本の線状を形成した請求項8のタッチスイッチ。
- 第1基板と、
前記第1基板と対向する第2基板と、
前記第1基板において、第2基板との対向面に形成され、一定間隔で並べられた複数の第1電極と、
前記第2基板において、第1基板との反対面に形成され、一定間隔で並べられ、前記複数の泰1電極とで格子状になる複数の第2電極と、を備えるタッチスイッチであって、
前記第1電極と第2電極がそれぞれ複数の導体線によって網目を形成しており、導体線の方向がディスプレイのブラックマトリクスに対して斜め方向であるタッチスイッチ。 - 前記第1基板における対向面において、第1電極同士の間に形成された第1補助線と、
前記第2基板における反対面において、第2電極同士の間に形成された第2補助線と、を備え、
前記第1電極の導体線、第1補助線、第2電極の導体線、第2補助線によって線の間隔が均等な1つの格子形状を形成した請求項10のタッチスイッチ。 - 前記第1基板に形成された第1電極の導体線、第1補助線、またはその両方は、第2基板に形成された第2電極の導体線、第2補助線、またはその両方とで1本の線状を形成した請求項11のタッチスイッチ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP09802922A EP2330488A4 (en) | 2008-07-31 | 2009-07-27 | PLANAR ELEMENT AND TOUCH SWITCH |
US13/000,634 US8717332B2 (en) | 2008-07-31 | 2009-07-27 | Planar element, and touch switch |
KR1020117004585A KR101329638B1 (ko) | 2008-07-31 | 2009-07-27 | 평면체 및 터치 스위치 |
CN200980130592.6A CN102112949B (zh) | 2008-07-31 | 2009-07-27 | 带电极平面基板和触摸开关 |
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JP2008-198419 | 2008-07-31 | ||
JP2008198419A JP5174575B2 (ja) | 2008-07-31 | 2008-07-31 | タッチパネル |
JP2009113755A JP5253288B2 (ja) | 2009-05-08 | 2009-05-08 | 面状体及びタッチスイッチ |
JP2009-113755 | 2009-05-08 |
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EP (2) | EP2330488A4 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
TWI444862B (zh) | 2014-07-11 |
KR101329638B1 (ko) | 2013-11-14 |
EP2330488A1 (en) | 2011-06-08 |
CN104635983B (zh) | 2018-01-30 |
CN102112949A (zh) | 2011-06-29 |
EP2330488A4 (en) | 2011-11-02 |
CN104635983A (zh) | 2015-05-20 |
EP2511806A2 (en) | 2012-10-17 |
KR20110051208A (ko) | 2011-05-17 |
US8717332B2 (en) | 2014-05-06 |
TW201013488A (en) | 2010-04-01 |
US20110102370A1 (en) | 2011-05-05 |
EP2511806A3 (en) | 2013-01-02 |
CN102112949B (zh) | 2015-05-06 |
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