WO2018142724A1 - Touch sensor and method for producing touch sensor - Google Patents

Touch sensor and method for producing touch sensor Download PDF

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Publication number
WO2018142724A1
WO2018142724A1 PCT/JP2017/041412 JP2017041412W WO2018142724A1 WO 2018142724 A1 WO2018142724 A1 WO 2018142724A1 JP 2017041412 W JP2017041412 W JP 2017041412W WO 2018142724 A1 WO2018142724 A1 WO 2018142724A1
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WO
WIPO (PCT)
Prior art keywords
touch sensor
resin film
film
uniaxially stretched
film member
Prior art date
Application number
PCT/JP2017/041412
Other languages
French (fr)
Japanese (ja)
Inventor
佳子郎 村田
雅一 福井
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2018142724A1 publication Critical patent/WO2018142724A1/en

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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

Definitions

  • the present invention relates to a touch sensor used for an input operation unit of various electronic devices and a method for manufacturing the touch sensor.
  • Various electronic devices have an input operation unit.
  • the input operation unit is configured by disposing a capacitive touch sensor in front of the display device.
  • the capacitive touch sensor includes a touch sensor main body and a retardation plate bonded to the touch sensor main body.
  • the touch sensor body is configured by arranging sensor electrodes on a resin substrate.
  • the phase difference plate is bonded to one surface of the touch sensor body using OCA (transparent adhesive).
  • Patent Document 1 A conventional touch sensor similar to the above touch sensor is disclosed in, for example, Patent Document 1.
  • the touch sensor includes a touch sensor body and a film member made of a uniaxially stretched resin film fixed to the touch sensor body.
  • a film member contains the site
  • a film member made of a uniaxially stretched resin film is fixed to the touch sensor main body without using OCA.
  • FIG. 1A is a plan view of a touch sensor according to an embodiment.
  • 1B is a cross-sectional view of the touch sensor shown in FIG. 1A along line IB-IB.
  • FIG. 2 is a diagram illustrating a manufacturing process in the method for manufacturing a touch sensor according to the embodiment.
  • FIG. 3A is a cross-sectional view of another touch sensor according to the embodiment.
  • FIG. 3B is a cross-sectional view of still another touch sensor according to the embodiment.
  • FIG. 3C is a cross-sectional view of still another touch sensor according to the embodiment.
  • FIG. 4A is a plan view of still another touch sensor according to the embodiment. 4B is a cross-sectional view of the touch sensor shown in FIG. 4A along line IVB-IVB.
  • FIG. 5 is a diagram showing a manufacturing process in the touch sensor shown in FIGS. 4A and 4B.
  • FIG. 1A is a plan view of the touch sensor 1 according to the embodiment.
  • FIG. 1B is a cross-sectional view taken along line IB-IB of touch sensor 1 shown in FIG. 1A.
  • FIG. 2 shows a manufacturing process in the manufacturing method of the touch sensor 1.
  • the capacitive touch sensor 1 is disposed in front of the display surface 501A of the display device 501.
  • the touch sensor 1 includes a touch sensor body 10 having transparency, and a film member 60 having transparency disposed so as to be fixed to the outer periphery of the touch sensor body 10.
  • the touch sensor main body 10 includes a substrate 31 having an electrode 21, a substrate 32 having an electrode 22 disposed on the substrate 31, and a cover lens 50 disposed on the substrate 32.
  • the substrate 31 and the substrate 32 are bonded together via a transparent adhesive 41, and the substrate 32 and the cover lens 50 are bonded together via a transparent adhesive 42.
  • the electrode 21 functions as a transmission electrode
  • the electrode 22 functions as a reception electrode.
  • the electrode 21 and the electrode 22 are disposed so as to cross each other in plan view in the direction Dk perpendicular to the surface 11.
  • the film member 60 is fixed to the outer periphery of the touch sensor body 10 by contracting a uniaxially stretched resin film 100 (see FIG. 2).
  • the touch sensor body 10 has a rectangular parallelepiped outer shape. That is, the touch sensor body 10 includes a surface 11 that is the surface of the cover lens 50, a surface 12 that is opposite to the surface 11, a side surface portion 13 that connects the surface 11 and the surface 12, and a side opposite to the side surface portion 13. And the side surface portion 14 connecting the surface 11 and the surface 12. Since the touch sensor main body 10 includes the stacked substrate 31, substrate 32, and cover lens 50, the side surface portion 13 and the side surface portion 14 have a certain level of difference in level. As shown in FIG. 1B, in the touch sensor 1 according to the embodiment, the side surface portion 14 has a large step.
  • the film member 60 is disposed so as to go around the outer periphery of the touch sensor body 10 at least once. That is, the film member 60 is arranged in this order on the side surface portion 13, the surface 11, the side surface portion 14, the surface 12, and the side surface portion 13.
  • the surfaces 11 and 12 of the touch sensor main body 10 respectively have view areas 511 and 512 through which light can be transmitted and the user can visually recognize the display surface 501A of the display device 501 through the touch sensor main body 10. At least the view areas 511 and 512 of the surface 11 and the surface 12 are covered with the film member 60.
  • the film member 60 is in close contact with the surface 11 and the surface 12 in the view areas 511 and 512.
  • the surface 11 and the surface 12 may have a step located at a place other than the view areas 511 and 512. Even in such a case, it is desirable that the film member 60 follows the surface 11 and the surface 12 so as to absorb the level difference and is in close contact therewith.
  • the film member 60 is fixed in close contact with the side surface portions 13 and 14 at portions other than the roots 502 of the large step portions of the side surface portion 13 and the side surface portion 14.
  • the film member 60 has an inner surface 60B facing the touch sensor body 10 and an outer surface 60A opposite to the inner surface 60B.
  • the film member 60 has a hard coat layer 160 provided on the outer surface 60A and a layer 260 provided on the inner surface 60B.
  • Hard coat layer 160 is harder than layer 260.
  • the film member 60 circulates the touch sensor main body in the circulation direction D1 from the end 60P to the end 60Q opposite to the end 60P.
  • the end portions 60S and 60T including the ends 60P and 60Q of the film member 60 are not on the surfaces 11 and 12, but on the side surface portion 13.
  • the overlapping end portions 60S and 60T are joined to each other.
  • the joining method at the joining portion is not particularly limited, such as welding or adhesion.
  • the film member 60 is made of a uniaxially stretched resin film 100 and is formed by shrinking the resin film 100 with heat.
  • the film member 60 is fixed to the outer periphery of the touch sensor body 10 by contraction of the resin film 100.
  • the end portions 60 ⁇ / b> S and 60 ⁇ / b> T to which the film member 60 described above is bonded are bonded with a force larger than the force applied when the resin film 100 contracts. That is, even if a force greater than the force applied when the resin film 100 is contracted is applied, the end portions 60S and 60T to which the film member 60 is joined are not separated.
  • a decoration 51 is provided on the surface 11 of the touch sensor body 10 (cover lens 50) around the view areas 511 and 512 in a plan view in the direction Dk. It is desirable that the end portions 60T and 60S to which the film member 60 is joined are located, for example, in the range of the decorative portion 51 other than the view areas 511 and 512 and the side surface portions 13 and 14.
  • the uniaxially stretched resin film 100 is formed by stretching in the stretching direction De.
  • the variation in the angle of the orientation axis of the molecules in the resin film 100 is extremely small.
  • the resin film 100 contracts in the stretching direction De due to an external factor such as heat, and is less likely to contract in directions other than the stretching direction De as compared to the stretching direction De. Therefore, even after the resin film 100 is contracted, the film member 60 having the same optical axis direction can be obtained.
  • the film member 60 has portions 61 and 62 that cover the surfaces 11 and 12 of the touch sensor main body 10, respectively. As described above, the directions of the optical axes of the portions 61 and 62 of the film member 60 are substantially the same.
  • the portions 61 and 62 each function as a retardation plate.
  • the phase difference of light having a wavelength of 550 nm in one piece of the film member 60 after shrinkage is about 3000 to 4500 nm.
  • the parts 61 and 62 of the film member 60 are combined and the light retardation value at the part 61 and the part 62 are combined. It is substantially equivalent to a retardation plate having a sum retardation value obtained by simply adding the retardation value of light. That is, the retardation value of light having a wavelength of 550 nm in the touch sensor 1 is about 6000 nm to 9000 nm. In the touch sensor 1, since the retardation value is about 6000 nm or more, polarization can be eliminated.
  • the display device 501 includes a liquid crystal display element (LCD) having a polarization transmission axis.
  • the touch sensor 1 is arranged so that the slow axis that is the optical axis of the film member 60 is inclined by, for example, an angle of 30 to 60 degrees with respect to the polarization transmission axis of the display device 501.
  • the touch sensor 1 is arranged such that the slow axis of the film member 60 is inclined by an angle of 40 degrees to 50 degrees with respect to the polarization transmission axis of the display device 501.
  • the touch sensor 1 having a light retardation value (total of the portions 61 and 62) of about 6000 nm at a wavelength of 550 nm is combined with a white light emitting diode (LED), which is a light source that emits white light, and an LCD.
  • LED white light emitting diode
  • LCD liquid crystal display
  • the touch sensor body 10 is preferably made of a light isotropic member.
  • the substrate 31, the substrate 32, and the cover lens 50 are preferably made of polycarbonate (PC) resin or glass.
  • the hard coat layer 160 By disposing the resin film 100 with the hard coat layer 160 facing outward, the hard coat layer 160 can be disposed on the outer surface of the portion 61 or the outer surface of the portion 62 serving as the operation surface. With this configuration, the operation surface can be protected against a touch operation with a finger or the like on the part 61 or the part 62.
  • the surface 11, the surface 12 opposite to the surface 11, the side surface portion 13 connecting the surface 11 and the surface 12, and the surface 11 on the opposite side of the side surface portion 13 The touch sensor main body 10 having the side surface portion 14 connecting the surface 12 is prepared.
  • the uniaxially stretched resin film 100 is disposed so as to be wound around the outer periphery of the touch sensor main body 10 with a gap 200S, and the end portions 60S and 60T of the resin film 100 are joined to each other and the work in progress is performed.
  • Make 200 the joining method of the overlapping end portions 60S and 60T is not particularly limited, such as welding or adhesion.
  • the touch sensor main body 10 is positioned inside the cylindrical shape of the resin film 100 having a cylindrical shape.
  • positioning the resin film 100 the extending
  • the resin film 100 when the resin film 100 is disposed, the resin film 100 may be disposed such that the end 60 ⁇ / b> P of the resin film 100 is positioned and the outer periphery of the touch sensor body 10 is wound.
  • the end 60 ⁇ / b> P of the resin film 100 is temporarily fixed to the touch sensor main body 10 or is held by a holding portion provided on the resin film 100 to position the end 60 ⁇ / b> P.
  • the resin film 100 may be formed in a cylindrical shape in advance, and the touch sensor main body 10 may be inserted into the cylindrical shape of the resin film 100 to manufacture the work-in-process 200. Even in this case, the cylindrical resin film 100 is disposed with a gap 200 ⁇ / b> S with respect to the outer periphery of the touch sensor body 10.
  • the resin film 100 desirably has a functional layer such as a hard coat layer to be the hard coat layer 160 illustrated in FIG. 1B on the outer surface side.
  • the work-in-process 200 is exposed to a predetermined temperature environment.
  • a uniaxially stretched PET film having a thickness of 30 ⁇ m to 50 ⁇ m is used as the resin film 100
  • the work-in-process 200 is exposed to a thermal environment of 70 to 90 degrees Celsius for several seconds (for example, about 2 to 20 seconds).
  • a predetermined temperature for example, hot air heating, infrared radiation, steam, hot water, or the like may be used.
  • the substrate 31 and the substrate 32 are made of a PET film or a PC film, but the substrate 31 and the substrate 32 are preliminarily annealed at a temperature that is about twice that temperature. For this reason, the deformation
  • the resin film 100 is contracted by heat along the stretching direction De, and the film member 60 is fixed to the outer periphery of the touch sensor body 10 by the contraction of the resin film 100.
  • the touch sensor 1 can be manufactured. That is, the touch sensor 1 in which the part 61 that covers the surface 11 and functions as a retardation plate through the second step and the part 62 that covers the surface 12 and functions as a retardation film are fixedly disposed on the touch sensor body 10 are manufactured. it can. With this manufacturing method, the touch sensor 1 can be obtained even if the transparent adhesive (OCA) for fixing the part 61 and the part 62 to the touch sensor main body 10 is eliminated.
  • OCA transparent adhesive
  • the uniaxially stretched resin film 100 shrinks 40% to 60% almost uniformly in the stretching direction De.
  • the stretching direction De of the resin film 100 is made to coincide with the circulation direction D1 in the first step, the film member 60 is arranged while absorbing a large step at the side surface portion 13 and suitable for the arrangement relationship of the optical axis with the combined display element. It becomes possible.
  • the surface 11 and the part 61 are easily in close contact with each other, and the surface 12 and the part 62 are easily in close contact with each other, and there is almost no gap or relative displacement between the film member 60 and the outer periphery of the touch sensor body 10. It can be constituted as follows. In other words, the length that the resin film 100 circulates in the first step is set so that the film member 60 is firmly attached to the touch sensor body 10.
  • the resin film 100 hardly shrinks along the lateral direction perpendicular to the stretching direction De in the second step. For this reason, the dimension in the horizontal direction of the resin film 100 in the first step is set so that the resin film 100 completely covers at least the view areas 511 and 512. Or the dimension of the horizontal direction of the resin film 100 is set so that the surface 11 and the surface 12 may be covered entirely. Moreover, the force of the shrinking resin film 100 is applied to the joining portion of the end portions 60S and 60T of the resin film 100.
  • the joining portion is peeled off during shrinkage, it causes a deviation of the angle of the optical axis of the parts 61 and 62, and therefore the ends 60S and 60T are joined with a force that does not cause peeling due to the influence of the force during shrinkage.
  • the touch sensor 1 which has the parts 61 and 62 used as a phase difference plate, and was fixed by the structure replaced with OCA can be manufactured.
  • FIG. 3A is a cross-sectional view of another touch sensor 1A in the embodiment. 3A, the same reference numerals are given to the same portions as those of the touch sensor 1 shown in FIGS. 1A and 1B.
  • the portions 61 and 62 are each composed of a single film member 60.
  • the part 61 is composed of a plurality of parts of the film member 60 that overlap each other.
  • a part 61 that overlaps the surface 11 of the touch sensor body 10 of the film member 60 has a part 61A that covers the surface 11 of the touch sensor body 10 and a part 61B that covers the part 61A.
  • Other configurations are the same as those of the touch sensor 1.
  • the parts 61A and 61B are in close contact with each other and overlap each other.
  • the part 61A is fixed in close contact with the surface 11 of the touch sensor body 10 in the same manner as the touch sensor 1 shown in FIGS. 1A, 1B, and 2.
  • the part 61B of the film member 60 is in close contact with and overlaps the part 61A.
  • the part 61 ⁇ / b> A of the film member 60 covers the surface 11 of the touch sensor main body 10.
  • the part 61B of the film member 60 covers the surface 11 of the touch sensor body 10 via the part 61A.
  • a portion 62 of the film member 60 covers the surface 12 of the touch sensor body 10.
  • the resin film 100 is disposed around the outer periphery of the touch sensor body 10 so that the surface 11 of the touch sensor body 10 is double covered with the two portions of the resin film 100. That is, in the first step, the resin film 100 is disposed so as to be wound about approximately one and a half times around the outer periphery of the touch sensor body 10. And it is formed in the film member 60 which has the site
  • the touch sensor 1 ⁇ / b> A in which the portions 61 ⁇ / b> A and 61 ⁇ / b> B are arranged so as to overlap the surface 11 of the touch sensor body 10 is obtained.
  • the part 61A is in close contact with the surface 11, and the parts 61A and 61B are also in close contact with each other. That is, the touch sensor 1A can be obtained with a small number of man-hours without interposing the transparent adhesive (OCA) between the part 61A and the part 61B in addition to the part 61A and the surface 11.
  • OCA transparent adhesive
  • the touch sensor 1A linearly polarized light incident from a display device 501 such as an LCD is emitted through the portions 62, 61A, and 61B of the film member 60. Since the parts 62, 61A, 61B of the film member 60 are formed by shrinking the uniaxially stretched resin film 100, the directions of the optical axes of the three parts 61A, 61B, 62 of the film member 60 are substantially aligned. .
  • the retardation value of light having a wavelength of 550 nm in the touch sensor 1A is approximately three times that of 3000 nm to 4500 nm.
  • the total value of the retardation values is substantially equal to the product of the number of portions where the film members 60 are arranged multiplied by the retardation value of the film members 60.
  • the optical characteristics can be improved.
  • the total value of the retardation value can be adjusted by the number of parts covering the surfaces 11 and 12 of the touch sensor body 10 of the film member 60.
  • substrate 32 which consist of a resin sheet of the touch sensor main body 10 decreases. For example, even if a biaxially stretched PET sheet is used for the substrate 31 and the substrate 32, there is a possibility that the rainbow appearance and the like can be suppressed.
  • FIG. 3B is a cross-sectional view of still another touch sensor 1B in the embodiment. 3B, the same reference numerals are given to the same portions as those of the touch sensor 1A shown in FIG. 3A.
  • the part 62 is composed of a plurality of parts of the film member 60 that overlap each other.
  • a portion 62 of the film member 60 that overlaps the surface 12 of the touch sensor body 10 has a portion 62A that covers the surface 12 of the touch sensor body 10 and a portion 62B that covers the portion 62A.
  • the parts 62A and 62B are in close contact with each other and overlap.
  • the part 62A is fixed in close contact with the surface 12 of the touch sensor body 10 in the same manner as the touch sensors 1 and 1A shown in FIGS. 1A, 1B, 2 and 3A.
  • the part 62B of the film member 60 is in close contact with and overlaps the part 62A.
  • the part 62 ⁇ / b> A of the film member 60 covers the surface 12 of the touch sensor main body 10.
  • the part 62B of the film member 60 covers the surface 12 of the touch sensor main body 10 via the part 62A.
  • the manufacturing method of the touch sensor 1B will be described below.
  • the surface 11 of the touch sensor body 10 is doubly covered with the two parts of the resin film 100, and the face 12 of the touch sensor body 10 is doubly covered with the two parts of the resin film 100.
  • the resin film 100 is arranged around the outer periphery of the touch sensor body 10. That is, in the first step, the resin film 100 is disposed so as to be wound approximately twice around the outer periphery of the touch sensor body 10. Then, the resin film 100 is contracted in the second step to form the film member 60 having the portions 61A and 61B that are in close contact with each other and the portions 62A and 62B that are in close contact and overlap with each other.
  • the touch sensor 1B in which the parts 61A and 61B are arranged so as to overlap the surface 11 of the touch sensor main body 10 and the parts 62A and 62B are arranged so as to overlap the surface 12 of the touch sensor main body 10 is obtained.
  • the part 62A is in close contact with the surface 12, and the parts 62A and 62B are also in close contact with each other. That is, the touch sensor 1B can be obtained with a small number of man-hours without interposing a transparent adhesive (OCA) between the part 62A and the part 62B in addition to the part 62A and the surface 12.
  • OCA transparent adhesive
  • the touch sensor 1B linearly polarized light incident from a display device 501 such as an LCD is emitted through the portions 62B, 62A, 61A, 61B of the film member 60. Since the parts 61A, 61B, 62A and 62B of the film member 60 are all formed by shrinking the uniaxially stretched resin film 100, the directions of the optical axes of the four parts 61A, 61B, 62A and 62B of the film member 60 are Almost complete. For example, when the above-described PET film is used as the resin film 100, the retardation value of light having a wavelength of 550 nm in the touch sensor 1A is approximately four times that of 3000 nm to 4500 nm.
  • the total value of the retardation values is substantially equal to the product of the number of portions where the film members 60 are arranged multiplied by the retardation value of the film members 60.
  • the optical characteristics can be improved.
  • the film member 60 may not have 61B among the portions 61A and 61B of the film member 60 that covers the surface 11 of the touch sensor main body 10. In this case, similar to the touch sensor 1A, a retardation value approximately three times that of the film member 60 is obtained. When producing this touch sensor, the film member 60 is caused to circulate around the touch sensor body 10 in the circumferential direction opposite to the circumferential direction D1.
  • FIG. 3C is a cross-sectional view of still another touch sensor 1C in the embodiment.
  • the same reference numerals are given to the same portions as those of the touch sensors 1A and 1B shown in FIGS. 3A and 3B.
  • the position where the film member 60 overlaps is different.
  • the part 62A that overlaps the surface 12 of the touch sensor body 10 of the film member 60 covers the surface 12 of the touch sensor body 10, and the part And a portion 62B covering 62A.
  • the film member 60 has a portion 61 that is fixed in close contact with the surface 11 of the touch sensor body 10.
  • the touch sensor main body 10 includes substrates 31 and 32.
  • the electrodes 21 and 22 are disposed on the substrate 31, and the touch sensor main body 10 may not have the substrate 32.
  • the decoration part 51 provided on the surface 11 of the touch sensor body 10 is covered with the film member 60, so that the decoration part 51 can be protected.
  • FIG. 4A is a plan view of still another touch sensor 2 in the embodiment.
  • 4B is a cross-sectional view of touch sensor 2 shown in FIG. 4A along line IVB-IVB.
  • 4A and 4B the same reference numerals are assigned to the same parts as those of the touch sensor 1 shown in FIGS. 1A and 1B.
  • the touch sensor 2 includes a touch sensor main body 10A and a film member 65 that is fixed to the outer periphery of the touch sensor main body 10A.
  • the touch sensor main body 10A includes a rigid board member 70 having a predetermined thickness, a sensor electrode 71, and a flexible circuit (FPC) board 80 for external connection.
  • the touch sensor body 10A does not include the cover lens 50 of the touch sensor 1 shown in FIG. 1B.
  • the substrate member 70 has a substantially rectangular parallelepiped shape, and has a front surface and a back surface opposite to the front surface.
  • a sensor electrode 71 is disposed on the back surface of the substrate member 70.
  • a terminal portion 73 formed at the end of the routing wiring from the sensor electrode 71 is also installed on the back surface of the substrate member 70.
  • a protective layer 75 is overlaid on the back surface. That is, the sensor electrode 71 is covered with the protective layer 75.
  • the protective layer 75 may be provided as necessary, and the touch sensor body 10 ⁇ / b> A may not have the protective layer 75.
  • An external connection FPC board 80 is connected to the terminal portion 73 via a conductive adhesive.
  • the substrate member 70 is made of, for example, a resin body such as PC resin or a translucent member such as glass.
  • the substrate member 70 is desirably optically isotropic.
  • the sensor electrode 71 is disposed in a groove provided on the back surface of the substrate member 70, the groove may not be provided on the back surface of the substrate member 70, and may be flat.
  • the sensor electrode 71 or the like may be provided on the surface of the substrate member 70 or the like.
  • the surface of the substrate member 70 forms the surface 11A of the touch sensor main body.
  • the surface 12A opposite to the surface 11A of the touch sensor main body 10A includes the outer surface of the FPC board 80 exposed on the back surface side of the substrate member 70, the outer surface of the protective layer 75, and the like.
  • the touch sensor body 10A further includes a side surface portion 13A that connects the surfaces 11A and 12A, and a side surface portion 14A that connects the surfaces 11A and 12A at a position facing the side surface portion 13A.
  • the FPC board 80 protrudes from the side surface portion 14A.
  • the film member 65 is fixed and arranged on the outer periphery of the touch sensor body 10A.
  • the film member 65 has opposite ends 65P and 65Q.
  • the film member 65 is arranged in the circumferential direction D2 in the order of the side surface portion 14A, the surface 11A, the side surface portion 13A, the surface 12A, and the side surface portion 14A of the touch sensor main body 10A. End portions 65S and 65T including the ends 65P and 65Q of the film member 65 are joined on the side surface portion 14A.
  • the film member 65 is in close contact with the surface 11A.
  • the film member 65 is also in close contact with the installation area of the sensor electrode 71 on the surface 12A.
  • the film member 65 is in close contact with the surface 12A at a place other than the gap.
  • the film member 65 has a hole 90 for allowing the FPC board 80 protruding from the side surface part 14 ⁇ / b> A to escape, and a tail part of the FPC board 80 protrudes outward from the hole 90.
  • the film member 65 is formed by shrinking a uniaxially stretched resin film with heat, as in the case of the touch sensors 1, 1 ⁇ / b> A, and 1 ⁇ / b> B.
  • the hole 90 is surrounded by the film member 65 on the entire circumference.
  • FIG. 5 shows the manufacturing process of the touch sensor 2.
  • the touch sensor body 10A is prepared in the preparation process.
  • the touch sensor main body 10A includes an FPC board 80, and has surfaces 11A and 12A and side portions 13A and 14A.
  • the resin film 100 is produced in the work-in-progress 200 ⁇ / b> A arranged in the cylindrical shape by circling around the outer circumference of the touch sensor main body 10 ⁇ / b> A in the circumferential direction D ⁇ b> 2 as described above. That is, in the work-in-process 200A, the touch sensor main body 10A is located inside the cylindrical resin film 100.
  • the resin film 100 used in the first step is provided with a hole 110 through which the FPC board 80 passes.
  • the FPC board 80 is inserted through the hole 110 when the work-in-process 200 ⁇ / b> A is manufactured.
  • the hole 110 is surrounded by the resin film 100 all around.
  • the width in the stretching direction De which is the direction in which the resin film 100 shrinks, of the hole 110 is set to be large in consideration of the shrinkage amount. Since the resin film 100 hardly shrinks in the direction perpendicular to the stretching direction De, the width of the hole 110 in that direction is set to such an extent that the FPC board 80 can be inserted.
  • the film member 65 may be protected from the outside including the connection portion with the terminal portion of the FPC board 80 or may not be covered with the resin film 100.
  • the hole part 110 of the resin film 100 may have a notch shape opened at the end 65Q.
  • the work-in-process 200A is treated with heat in the same manner as described above to shrink the resin film 100, and the touch sensor 2 is manufactured.
  • the thickness and material of the substrate member 70 are set so that the substrate member 70 is not greatly deformed when the resin film 100 contracts.
  • the touch sensor 2 obtained by the process mentioned above when the PET film mentioned above is used as the resin film 100, for example, the site
  • a uniaxially stretched PET film is used as an example of the resin film 100.
  • the thickness of the PET film may be selected according to necessary optical characteristics, but a thickness of 100 ⁇ m or less is desirable. If the PET film is thick, wrinkles are likely to occur at the time of shrinkage. Therefore, it is desirable to use a PET film having a thickness of 30 ⁇ m to 50 ⁇ m. It is also possible to use a resin film 100 made of a material other than a uniaxially stretched PET film. Although the retardation value after shrinkage is smaller than that of PET, for example, a uniaxially stretched olefin resin film, a uniaxially stretched styrene resin film, or the like may be used. And the temperature at the time of shrinking these resin films is suitably set according to material.

Abstract

Provided is a touch sensor comprising: a touch sensor body; and a film member made of a uniaxially stretched resin film fixed to the touch sensor body. The film member includes portions covering each mutually opposite surface of the touch sensor body. The touch sensor is configured such that the film member made of a uniaxially stretched resin film can be fixed to the touch sensor body without using an OCA.

Description

タッチセンサおよびタッチセンサの製造方法Touch sensor and method of manufacturing touch sensor
　本発明は、各種電子機器の入力操作部などに用いられるタッチセンサおよびタッチセンサの製造方法に関する。 The present invention relates to a touch sensor used for an input operation unit of various electronic devices and a method for manufacturing the touch sensor.
　各種電子機器は入力操作部を有する。入力操作部は、静電容量式のタッチセンサを表示装置の前方に配置して構成される。 Various electronic devices have an input operation unit. The input operation unit is configured by disposing a capacitive touch sensor in front of the display device.
　静電容量式のタッチセンサは、タッチセンサ本体とタッチセンサ本体に貼り合せられた位相差板を含む。タッチセンサ本体は、樹脂製の基板にセンサ電極を配置して構成されている。位相差板は、タッチセンサ本体の一方の面にＯＣＡ（透明粘着剤）を用いて貼り合わせられる。 The capacitive touch sensor includes a touch sensor main body and a retardation plate bonded to the touch sensor main body. The touch sensor body is configured by arranging sensor electrodes on a resin substrate. The phase difference plate is bonded to one surface of the touch sensor body using OCA (transparent adhesive).
　上記タッチセンサに類似の従来のタッチセンサは例えば特許文献１に開示されている。 A conventional touch sensor similar to the above touch sensor is disclosed in, for example, Patent Document 1.
特開２００５－１９０３８２号公報JP 2005-190382 A
　タッチセンサは、タッチセンサ本体と、タッチセンサ本体に固定された一軸延伸の樹脂フィルム製のフィルム部材とを備える。フィルム部材は、タッチセンサ本体の互いに反対の面をそれぞれ覆う部位を含む。 The touch sensor includes a touch sensor body and a film member made of a uniaxially stretched resin film fixed to the touch sensor body. A film member contains the site | part which respectively covers the mutually opposing surface of a touch sensor main body.
　このタッチセンサはＯＣＡを用いずに一軸延伸の樹脂フィルム製のフィルム部材をタッチセンサ本体に固定させている。 In this touch sensor, a film member made of a uniaxially stretched resin film is fixed to the touch sensor main body without using OCA.
図１Ａは実施形態によるタッチセンサの平面図である。FIG. 1A is a plan view of a touch sensor according to an embodiment. 図１Ｂは図１Ａに示すタッチセンサの線ＩＢ－ＩＢにおける断面図である。1B is a cross-sectional view of the touch sensor shown in FIG. 1A along line IB-IB. 図２は実施形態によるタッチセンサの製造方法における製造過程を示す図である。FIG. 2 is a diagram illustrating a manufacturing process in the method for manufacturing a touch sensor according to the embodiment. 図３Ａは実施形態による他のタッチセンサの断面図である。FIG. 3A is a cross-sectional view of another touch sensor according to the embodiment. 図３Ｂは実施形態によるさらに他のタッチセンサの断面図である。FIG. 3B is a cross-sectional view of still another touch sensor according to the embodiment. 図３Ｃは実施形態によるさらに他のタッチセンサの断面図である。FIG. 3C is a cross-sectional view of still another touch sensor according to the embodiment. 図４Ａは実施形態によるさらに他のタッチセンサの平面図である。FIG. 4A is a plan view of still another touch sensor according to the embodiment. 図４Ｂは図４Ａに示すタッチセンサの線ＩＶＢ－ＩＶＢにおける断面図である。4B is a cross-sectional view of the touch sensor shown in FIG. 4A along line IVB-IVB. 図５は図４Ａと図４Ｂに示すタッチセンサでの製造過程を示す図である。FIG. 5 is a diagram showing a manufacturing process in the touch sensor shown in FIGS. 4A and 4B.
　図１Ａは実施形態によるタッチセンサ１の平面図である。図１Ｂは図１Ａに示すタッチセンサ１の線ＩＢ－ＩＢにおける断面図である。図２はタッチセンサ１の製造方法における製造過程を示す。 FIG. 1A is a plan view of the touch sensor 1 according to the embodiment. FIG. 1B is a cross-sectional view taken along line IB-IB of touch sensor 1 shown in FIG. 1A. FIG. 2 shows a manufacturing process in the manufacturing method of the touch sensor 1.
　図１Ａと図１Ｂに示すように、静電容量式のタッチセンサ１は表示装置５０１の表示面５０１Ａの前に配置される。タッチセンサ１は、透明性を有するタッチセンサ本体１０と、タッチセンサ本体１０の外周に固定されて配置された透明性を有するフィルム部材６０とを有する。タッチセンサ本体１０は、電極２１を有する基板３１と、基板３１に重ねて配置されて電極２２を有する基板３２と、基板３２に重ねて配置されたカバーレンズ５０とを含む。基板３１と基板３２との間は透明粘着剤４１を介して貼り合わせられ、基板３２とカバーレンズ５０との間は透明粘着剤４２を介して貼り合わせられている。電極２１は送信電極として機能し、電極２２は受信電極として機能する。面１１に直角の方向Ｄｋでの平面視で電極２１と電極２２は互いに交差する位置関係で設置されている。フィルム部材６０は、一軸延伸の樹脂フィルム１００（図２参照）を収縮させることによってタッチセンサ本体１０の外周に固定されている。 1A and 1B, the capacitive touch sensor 1 is disposed in front of the display surface 501A of the display device 501. The touch sensor 1 includes a touch sensor body 10 having transparency, and a film member 60 having transparency disposed so as to be fixed to the outer periphery of the touch sensor body 10. The touch sensor main body 10 includes a substrate 31 having an electrode 21, a substrate 32 having an electrode 22 disposed on the substrate 31, and a cover lens 50 disposed on the substrate 32. The substrate 31 and the substrate 32 are bonded together via a transparent adhesive 41, and the substrate 32 and the cover lens 50 are bonded together via a transparent adhesive 42. The electrode 21 functions as a transmission electrode, and the electrode 22 functions as a reception electrode. The electrode 21 and the electrode 22 are disposed so as to cross each other in plan view in the direction Dk perpendicular to the surface 11. The film member 60 is fixed to the outer periphery of the touch sensor body 10 by contracting a uniaxially stretched resin film 100 (see FIG. 2).
　タッチセンサ本体１０は直方体状の外形を有する。つまり、タッチセンサ本体１０は、カバーレンズ５０の表面である面１１と、面１１とは反対の面１２と、面１１と面１２との間を繋ぐ側面部１３と、側面部１３の反対側で面１１と面１２との間を繋ぐ側面部１４とを有する。タッチセンサ本体１０は、積層された基板３１と基板３２とカバーレンズ５０とを有するので、側面部１３と側面部１４とは或る程度の段差を有する。なお、図１Ｂに示すように、実施の形態におけるタッチセンサ１では、側面部１４が大きい段差を有する。 The touch sensor body 10 has a rectangular parallelepiped outer shape. That is, the touch sensor body 10 includes a surface 11 that is the surface of the cover lens 50, a surface 12 that is opposite to the surface 11, a side surface portion 13 that connects the surface 11 and the surface 12, and a side opposite to the side surface portion 13. And the side surface portion 14 connecting the surface 11 and the surface 12. Since the touch sensor main body 10 includes the stacked substrate 31, substrate 32, and cover lens 50, the side surface portion 13 and the side surface portion 14 have a certain level of difference in level. As shown in FIG. 1B, in the touch sensor 1 according to the embodiment, the side surface portion 14 has a large step.
　フィルム部材６０は、図１Ｂに示すように、タッチセンサ本体１０の外周を少なくとも１周周回するように配置されている。つまり、フィルム部材６０は、側面部１３と面１１と側面部１４と面１２と側面部１３とにこの順に配置されている。タッチセンサ本体１０の面１１、１２は、光が透過してかつユーザがタッチセンサ本体１０を通して表示装置５０１の表示面５０１Ａを視認できるビューエリア５１１、５１２をそれぞれ有する。面１１および面１２の少なくともビューエリア５１１、５１２はフィルム部材６０で覆われている。フィルム部材６０は、ビューエリア５１１、５１２内では面１１および面１２に密着している。なお、面１１や面１２はビューエリア５１１、５１２以外の箇所に位置する段差を有してもよい。その場合でもフィルム部材６０は段差を吸収するように面１１や面１２に全面的に追従し密着していると望ましい。フィルム部材６０は、側面部１３や側面部１４の大きい段差部分の根元５０２を除く箇所では側面部１３、１４に密着して固定されている。 As shown in FIG. 1B, the film member 60 is disposed so as to go around the outer periphery of the touch sensor body 10 at least once. That is, the film member 60 is arranged in this order on the side surface portion 13, the surface 11, the side surface portion 14, the surface 12, and the side surface portion 13. The surfaces 11 and 12 of the touch sensor main body 10 respectively have view areas 511 and 512 through which light can be transmitted and the user can visually recognize the display surface 501A of the display device 501 through the touch sensor main body 10. At least the view areas 511 and 512 of the surface 11 and the surface 12 are covered with the film member 60. The film member 60 is in close contact with the surface 11 and the surface 12 in the view areas 511 and 512. Note that the surface 11 and the surface 12 may have a step located at a place other than the view areas 511 and 512. Even in such a case, it is desirable that the film member 60 follows the surface 11 and the surface 12 so as to absorb the level difference and is in close contact therewith. The film member 60 is fixed in close contact with the side surface portions 13 and 14 at portions other than the roots 502 of the large step portions of the side surface portion 13 and the side surface portion 14.
　フィルム部材６０は、タッチセンサ本体１０に面する内面６０Ｂと、内面６０Ｂの反対側の外面６０Ａとを有する。フィルム部材６０は外面６０Ａに設けられたハードコート層１６０と、内面６０Ｂに設けられた層２６０とを有する。ハードコート層１６０は層２６０より硬い。 The film member 60 has an inner surface 60B facing the touch sensor body 10 and an outer surface 60A opposite to the inner surface 60B. The film member 60 has a hard coat layer 160 provided on the outer surface 60A and a layer 260 provided on the inner surface 60B. Hard coat layer 160 is harder than layer 260.
　フィルム部材６０は端６０Ｐから端６０Ｐの反対側の端６０Ｑまでタッチセンサ本体を周回方向Ｄ１に周回している。フィルム部材６０の端６０Ｐ、６０Ｑをそれぞれ含む端部６０Ｓ、６０Ｔは面１１、１２上では無く側面部１３上で重なっている。重なり合った端部６０Ｓ、６０Ｔは互いに接合されている。この接合する部分での接合方法は溶着や接着など特に限定されない。フィルム部材６０は一軸延伸の樹脂フィルム１００よりなり樹脂フィルム１００を熱で収縮させて形成される。フィルム部材６０は、樹脂フィルム１００の収縮によってタッチセンサ本体１０の外周に固定される。なお、上述したフィルム部材６０の接合する端部６０Ｓ、６０Ｔは、樹脂フィルム１００の収縮時に加わる力より大きい力で接合されている。すなわち、樹脂フィルム１００の収縮時に加わる力より大きい力が加わってもフィルム部材６０の接合する端部６０Ｓ、６０Ｔは分離しない。方向Ｄｋでの平面視でビューエリア５１１、５１２の周囲においてタッチセンサ本体１０（カバーレンズ５０）の面１１にはビューエリア５１１、５１２より光を通しにくい加飾部５１が設けられている。フィルム部材６０の接合する端部６０Ｔ、６０Ｓは例えばビューエリア５１１、５１２以外の加飾部５１の範囲や側面部１３、１４に位置すると望ましい。 The film member 60 circulates the touch sensor main body in the circulation direction D1 from the end 60P to the end 60Q opposite to the end 60P. The end portions 60S and 60T including the ends 60P and 60Q of the film member 60 are not on the surfaces 11 and 12, but on the side surface portion 13. The overlapping end portions 60S and 60T are joined to each other. The joining method at the joining portion is not particularly limited, such as welding or adhesion. The film member 60 is made of a uniaxially stretched resin film 100 and is formed by shrinking the resin film 100 with heat. The film member 60 is fixed to the outer periphery of the touch sensor body 10 by contraction of the resin film 100. Note that the end portions 60 </ b> S and 60 </ b> T to which the film member 60 described above is bonded are bonded with a force larger than the force applied when the resin film 100 contracts. That is, even if a force greater than the force applied when the resin film 100 is contracted is applied, the end portions 60S and 60T to which the film member 60 is joined are not separated. A decoration 51 is provided on the surface 11 of the touch sensor body 10 (cover lens 50) around the view areas 511 and 512 in a plan view in the direction Dk. It is desirable that the end portions 60T and 60S to which the film member 60 is joined are located, for example, in the range of the decorative portion 51 other than the view areas 511 and 512 and the side surface portions 13 and 14.
　一軸延伸の樹脂フィルム１００は延伸方向Ｄｅに延伸して形成される。樹脂フィルム１００内での分子の配向主軸の角度ばらつきは極めて小さい。このため、樹脂フィルム１００は熱などの外因により延伸方向Ｄｅに収縮し、延伸方向Ｄｅ以外の方向には延伸方向Ｄｅに比べ非常に収縮しにくい。したがって、樹脂フィルム１００の収縮後でも光軸の方向の揃ったフィルム部材６０を得ることができる。 The uniaxially stretched resin film 100 is formed by stretching in the stretching direction De. The variation in the angle of the orientation axis of the molecules in the resin film 100 is extremely small. For this reason, the resin film 100 contracts in the stretching direction De due to an external factor such as heat, and is less likely to contract in directions other than the stretching direction De as compared to the stretching direction De. Therefore, even after the resin film 100 is contracted, the film member 60 having the same optical axis direction can be obtained.
　フィルム部材６０はタッチセンサ本体１０の面１１、１２をそれぞれ覆う部位６１、６２を有する。上述のように、フィルム部材６０の部位６１、６２の光軸の方向はほぼ揃って同じである。樹脂フィルム１００として、例えばＰＥＴフィルム等を用いると、部位６１、６２はそれぞれ位相差板として機能する。例えば、厚み６０μｍの一軸延伸のＰＥＴフィルムを用いる場合、収縮後のフィルム部材６０の一枚での波長５５０ｎｍの光の位相差は３０００ｎｍ～４５００ｎｍ程度である。部位６１の光軸と部位６２の光軸はほぼ揃って同じ方向に向いているので、タッチセンサ１ではフィルム部材６０の部位６１、６２は合せて、部位６１での光のリタデーション値と部位６２での光のリタデーション値とを単純に加えた和のリタデーション値を有する位相差板とほぼ等価である。つまり、タッチセンサ１における波長５５０ｎｍの光のリタデーション値は６０００ｎｍ～９０００ｎｍ程度である。タッチセンサ１ではリタデーション値が６０００ｎｍ程度以上であるため偏光を解消できる。 The film member 60 has portions 61 and 62 that cover the surfaces 11 and 12 of the touch sensor main body 10, respectively. As described above, the directions of the optical axes of the portions 61 and 62 of the film member 60 are substantially the same. When, for example, a PET film or the like is used as the resin film 100, the portions 61 and 62 each function as a retardation plate. For example, when a uniaxially stretched PET film having a thickness of 60 μm is used, the phase difference of light having a wavelength of 550 nm in one piece of the film member 60 after shrinkage is about 3000 to 4500 nm. Since the optical axis of the part 61 and the optical axis of the part 62 are substantially aligned and are directed in the same direction, in the touch sensor 1, the parts 61 and 62 of the film member 60 are combined and the light retardation value at the part 61 and the part 62 are combined. It is substantially equivalent to a retardation plate having a sum retardation value obtained by simply adding the retardation value of light. That is, the retardation value of light having a wavelength of 550 nm in the touch sensor 1 is about 6000 nm to 9000 nm. In the touch sensor 1, since the retardation value is about 6000 nm or more, polarization can be eliminated.
　表示装置５０１は偏光透過軸を有する液晶表示素子（ＬＣＤ）よりなる。フィルム部材６０の光軸である遅相軸を例えば表示装置５０１の偏光透過軸に対して３０度～６０度の角度だけ傾斜するようにタッチセンサ１は配置されている。望ましくは、フィルム部材６０の遅相軸は表示装置５０１の偏光透過軸に対して４０度～５０度の角度だけ傾斜するようにタッチセンサ１は配置される。波長５５０ｎｍに光のリタデーション値（部位６１、６２の総和）が６０００ｎｍ程度以上であるタッチセンサ１を、白色の光を発する光源である白色発光ダイオード（ＬＥＤ）とＬＣＤとに組み合わせる。ＬＣＤ等から直線偏光を偏光板に入射させると虹色が見える場合がある。タッチセンサ１では、このような虹色が見えることをフィルム部材６０によって抑制できる。なお、タッチセンサ本体１０は光等方性の部材よりなることが望ましい。例えば、基板３１や基板３２、カバーレンズ５０はポリカーボネート（ＰＣ）樹脂やガラスなどよりなると望ましい。ハードコート層１６０を外側に向けて樹脂フィルム１００を配置することで、操作面となる部位６１の外面または部位６２の外面にハードコート層１６０を配置できる。この構成により部位６１または部位６２への指等でのタッチ操作に対して操作面を保護できる。 The display device 501 includes a liquid crystal display element (LCD) having a polarization transmission axis. The touch sensor 1 is arranged so that the slow axis that is the optical axis of the film member 60 is inclined by, for example, an angle of 30 to 60 degrees with respect to the polarization transmission axis of the display device 501. Desirably, the touch sensor 1 is arranged such that the slow axis of the film member 60 is inclined by an angle of 40 degrees to 50 degrees with respect to the polarization transmission axis of the display device 501. The touch sensor 1 having a light retardation value (total of the portions 61 and 62) of about 6000 nm at a wavelength of 550 nm is combined with a white light emitting diode (LED), which is a light source that emits white light, and an LCD. When linearly polarized light is incident on a polarizing plate from an LCD or the like, a rainbow color may be seen. In the touch sensor 1, such a rainbow color can be suppressed by the film member 60. The touch sensor body 10 is preferably made of a light isotropic member. For example, the substrate 31, the substrate 32, and the cover lens 50 are preferably made of polycarbonate (PC) resin or glass. By disposing the resin film 100 with the hard coat layer 160 facing outward, the hard coat layer 160 can be disposed on the outer surface of the portion 61 or the outer surface of the portion 62 serving as the operation surface. With this configuration, the operation surface can be protected against a touch operation with a finger or the like on the part 61 or the part 62.
　続いて、タッチセンサ１の製造方法について図２を参照しつつ説明する。 Subsequently, a manufacturing method of the touch sensor 1 will be described with reference to FIG.
　準備工程で、図２に示すように、面１１と、面１１の反対側の面１２と、面１１と面１２との間を繋ぐ側面部１３と、側面部１３の反対側で面１１と面１２との間を繋ぐ側面部１４を有するタッチセンサ本体１０を準備する。 In the preparation step, as shown in FIG. 2, the surface 11, the surface 12 opposite to the surface 11, the side surface portion 13 connecting the surface 11 and the surface 12, and the surface 11 on the opposite side of the side surface portion 13 The touch sensor main body 10 having the side surface portion 14 connecting the surface 12 is prepared.
　第一工程で、一軸延伸の樹脂フィルム１００を、タッチセンサ本体１０の外周に対し隙間２００Ｓを設けた状態で巻くように配置して、樹脂フィルム１００の端部６０Ｓ、６０Ｔを接合して仕掛品２００を製作する。なお、重なり合う端部６０Ｓ、６０Ｔの接合方法は溶着や接着等、特に限定はされない。そして、上記の説明から判るように仕掛品２００は、筒形状を有する樹脂フィルム１００の筒形状の内部にタッチセンサ本体１０が位置する。なお、樹脂フィルム１００を配置する際には、例えば一端から他端にかけての周回方向Ｄ１に対して樹脂フィルム１００の延伸方向Ｄｅを合わせて配置する。 In the first step, the uniaxially stretched resin film 100 is disposed so as to be wound around the outer periphery of the touch sensor main body 10 with a gap 200S, and the end portions 60S and 60T of the resin film 100 are joined to each other and the work in progress is performed. Make 200. In addition, the joining method of the overlapping end portions 60S and 60T is not particularly limited, such as welding or adhesion. As can be seen from the above description, in the work-in-process 200, the touch sensor main body 10 is positioned inside the cylindrical shape of the resin film 100 having a cylindrical shape. In addition, when arrange | positioning the resin film 100, the extending | stretching direction De of the resin film 100 is match | combined and arrange | positioned, for example with respect to the circulation direction D1 from one end to the other end.
　なお、樹脂フィルム１００を配置する際に、樹脂フィルム１００の端６０Ｐを位置決めしてタッチセンサ本体１０の外周を巻くように樹脂フィルム１００を配置してもよい。例えば樹脂フィルム１００の端６０Ｐをタッチセンサ本体１０に仮固定したり、樹脂フィルム１００に設けた保持部で保持したりして端６０Ｐを位置決めする。 Note that when the resin film 100 is disposed, the resin film 100 may be disposed such that the end 60 </ b> P of the resin film 100 is positioned and the outer periphery of the touch sensor body 10 is wound. For example, the end 60 </ b> P of the resin film 100 is temporarily fixed to the touch sensor main body 10 or is held by a holding portion provided on the resin film 100 to position the end 60 </ b> P.
　または、樹脂フィルム１００を予め筒形状に形成しておき、樹脂フィルム１００の筒形状の内部にタッチセンサ本体１０を挿入して仕掛品２００に製作してもよい。この場合でも、筒形状の樹脂フィルム１００はタッチセンサ本体１０の外周に対して隙間２００Ｓを有する状態で配置する。なお、樹脂フィルム１００は、外面側に例えば図１Ｂに示すハードコート層１６０となるハードコート層などの機能層を有すると望ましい。 Alternatively, the resin film 100 may be formed in a cylindrical shape in advance, and the touch sensor main body 10 may be inserted into the cylindrical shape of the resin film 100 to manufacture the work-in-process 200. Even in this case, the cylindrical resin film 100 is disposed with a gap 200 </ b> S with respect to the outer periphery of the touch sensor body 10. Note that the resin film 100 desirably has a functional layer such as a hard coat layer to be the hard coat layer 160 illustrated in FIG. 1B on the outer surface side.
　第二工程では、仕掛品２００を所定の温度の環境に晒す。樹脂フィルム１００として、厚みが３０μｍ～５０μｍの一軸延伸のＰＥＴフィルムを用いた場合、仕掛品２００を摂氏７０度～９０度の熱環境に数秒以上（例えば２秒～２０秒程度）晒す。所定の温度の環境に晒す手段としては、例えば熱風加熱、赤外線輻射を用いる、または蒸気や温水などを用いてもよい。なお、基板３１や基板３２はＰＥＴフィルムやＰＣフィルムで構成されることが多いが、基板３１や基板３２には、その約二倍程度の温度で事前にアニール処理が施されている。このため、第二工程において基板３１および基板３２の収縮等の熱による変形は殆ど生じない。 In the second step, the work-in-process 200 is exposed to a predetermined temperature environment. When a uniaxially stretched PET film having a thickness of 30 μm to 50 μm is used as the resin film 100, the work-in-process 200 is exposed to a thermal environment of 70 to 90 degrees Celsius for several seconds (for example, about 2 to 20 seconds). As means for exposing to an environment of a predetermined temperature, for example, hot air heating, infrared radiation, steam, hot water, or the like may be used. In many cases, the substrate 31 and the substrate 32 are made of a PET film or a PC film, but the substrate 31 and the substrate 32 are preliminarily annealed at a temperature that is about twice that temperature. For this reason, the deformation | transformation by heat, such as shrinkage | contraction of the board | substrate 31 and the board | substrate 32, hardly arises in a 2nd process.
　上述した温度の環境に仕掛品２００を晒すことで、樹脂フィルム１００は延伸方向Ｄｅに沿って熱によって収縮し、樹脂フィルム１００の収縮でタッチセンサ本体１０の外周にフィルム部材６０が固定されているタッチセンサ１が製造できる。つまり、第二工程を通じて面１１を覆って位相差板として機能する部位６１と、面１２を覆って位相差板として機能する部位６２をタッチセンサ本体１０に固定状態で配置したタッチセンサ１を製造できる。この製造方法であれば、タッチセンサ本体１０に対して部位６１、部位６２を固定するための透明粘着剤（ＯＣＡ）をなくしたとしてもタッチセンサ１が得られる。 By exposing the work-in-process 200 to the above-described temperature environment, the resin film 100 is contracted by heat along the stretching direction De, and the film member 60 is fixed to the outer periphery of the touch sensor body 10 by the contraction of the resin film 100. The touch sensor 1 can be manufactured. That is, the touch sensor 1 in which the part 61 that covers the surface 11 and functions as a retardation plate through the second step and the part 62 that covers the surface 12 and functions as a retardation film are fixedly disposed on the touch sensor body 10 are manufactured. it can. With this manufacturing method, the touch sensor 1 can be obtained even if the transparent adhesive (OCA) for fixing the part 61 and the part 62 to the touch sensor main body 10 is eliminated.
　なお、第二工程では、一軸延伸の樹脂フィルム１００は延伸方向Ｄｅにほぼ均一に４０％から６０％収縮する。第一工程で樹脂フィルム１００の延伸方向Ｄｅを周回方向Ｄ１に一致させると、組み合わせる表示素子との光軸の配置関係に適し、また側面部１３での大きい段差を吸収しつつフィルム部材６０が配置可能になる。そして、面１１と部位６１との間は密着し易く、面１２と部位６２との間は密着し易く、フィルム部材６０とタッチセンサ本体１０の外周との隙間や相対的な変位は殆ど生じないように構成することができる。換言すれば、第一工程での樹脂フィルム１００の周回する長さは、フィルム部材６０がタッチセンサ本体１０に強固に密着するように設定する。 In the second step, the uniaxially stretched resin film 100 shrinks 40% to 60% almost uniformly in the stretching direction De. When the stretching direction De of the resin film 100 is made to coincide with the circulation direction D1 in the first step, the film member 60 is arranged while absorbing a large step at the side surface portion 13 and suitable for the arrangement relationship of the optical axis with the combined display element. It becomes possible. The surface 11 and the part 61 are easily in close contact with each other, and the surface 12 and the part 62 are easily in close contact with each other, and there is almost no gap or relative displacement between the film member 60 and the outer periphery of the touch sensor body 10. It can be constituted as follows. In other words, the length that the resin film 100 circulates in the first step is set so that the film member 60 is firmly attached to the touch sensor body 10.
　樹脂フィルム１００は、第二工程で延伸方向Ｄｅに直角の横方向に沿ってはほとんど収縮しない。このため、第一工程での樹脂フィルム１００の横方向での寸法は、樹脂フィルム１００が少なくともビューエリア５１１、５１２を完全に覆うように設定する。または、樹脂フィルム１００の横方向の寸法は面１１、面１２を全体的に覆うように設定する。また、樹脂フィルム１００の端部６０Ｓ、６０Ｔの接合箇所は、収縮する樹脂フィルム１００の力が加わる。接合箇所が収縮時に剥がれると、部位６１、６２の光軸の角度のズレ等の要因となるため、収縮時の力の影響で剥がれなどが生じない力で端部６０Ｓ、６０Ｔを接合する。 The resin film 100 hardly shrinks along the lateral direction perpendicular to the stretching direction De in the second step. For this reason, the dimension in the horizontal direction of the resin film 100 in the first step is set so that the resin film 100 completely covers at least the view areas 511 and 512. Or the dimension of the horizontal direction of the resin film 100 is set so that the surface 11 and the surface 12 may be covered entirely. Moreover, the force of the shrinking resin film 100 is applied to the joining portion of the end portions 60S and 60T of the resin film 100. If the joining portion is peeled off during shrinkage, it causes a deviation of the angle of the optical axis of the parts 61 and 62, and therefore the ends 60S and 60T are joined with a force that does not cause peeling due to the influence of the force during shrinkage.
　以上の製造方法により、位相差板となる部位６１、６２を有し、かつ部位６１、６２をＯＣＡに代わる構成で固定したタッチセンサ１を製造できる。 By the above manufacturing method, the touch sensor 1 which has the parts 61 and 62 used as a phase difference plate, and was fixed by the structure replaced with OCA can be manufactured.
　図３Ａは実施形態における他のタッチセンサ１Ａの断面図である。図３Ａにおいて図１Ａと図１Ｂに示すタッチセンサ１と同じ部分には同じ参照番号を付す。図１Ａと図１Ｂに示すタッチセンサ１では、部位６１、６２がそれぞれ一枚のフィルム部材６０で構成されている。図３Ａに示すタッチセンサ１Ａでは、部位６１がフィルム部材６０の互いに重なった複数の部位で構成されている。 FIG. 3A is a cross-sectional view of another touch sensor 1A in the embodiment. 3A, the same reference numerals are given to the same portions as those of the touch sensor 1 shown in FIGS. 1A and 1B. In the touch sensor 1 shown in FIGS. 1A and 1B, the portions 61 and 62 are each composed of a single film member 60. In the touch sensor 1 </ b> A shown in FIG. 3A, the part 61 is composed of a plurality of parts of the film member 60 that overlap each other.
　図３Ａに示すタッチセンサ１Ａでは、フィルム部材６０のタッチセンサ本体１０の面１１に重なる部位６１が、タッチセンサ本体１０の面１１を覆う部位６１Ａと、部位６１Ａを覆う部位６１Ｂとを有する。その他の構成はタッチセンサ１と同じである。部位６１Ａ、６１Ｂは互いに密着して重なり合っている。部位６１Ａは、図１Ａと図１Ｂ、図２に示すタッチセンサ１と同様にタッチセンサ本体１０の面１１に密着して固定されている。フィルム部材６０の部位６１Ｂは部位６１Ａに密着して重なっている。このように、フィルム部材６０の部位６１Ａはタッチセンサ本体１０の面１１を覆う。フィルム部材６０の部位６１Ｂは部位６１Ａを介してタッチセンサ本体１０の面１１を覆う。フィルム部材６０の部位６２はタッチセンサ本体１０の面１２を覆う。 In the touch sensor 1A shown in FIG. 3A, a part 61 that overlaps the surface 11 of the touch sensor body 10 of the film member 60 has a part 61A that covers the surface 11 of the touch sensor body 10 and a part 61B that covers the part 61A. Other configurations are the same as those of the touch sensor 1. The parts 61A and 61B are in close contact with each other and overlap each other. The part 61A is fixed in close contact with the surface 11 of the touch sensor body 10 in the same manner as the touch sensor 1 shown in FIGS. 1A, 1B, and 2. The part 61B of the film member 60 is in close contact with and overlaps the part 61A. Thus, the part 61 </ b> A of the film member 60 covers the surface 11 of the touch sensor main body 10. The part 61B of the film member 60 covers the surface 11 of the touch sensor body 10 via the part 61A. A portion 62 of the film member 60 covers the surface 12 of the touch sensor body 10.
　タッチセンサ１Ａの製造方法を以下に説明する。上記の第一工程で、タッチセンサ本体１０の面１１を樹脂フィルム１００の２つの部位で二重に覆うようにタッチセンサ本体１０の外周に樹脂フィルム１００を巻くように配置する。つまり、第一工程では、樹脂フィルム１００をタッチセンサ本体１０の外周のほぼ一周半程度巻くように配置する。そして、第二工程で樹脂フィルム１００を収縮させることによって、密着して重なり合う部位６１Ａ、部位６１Ｂを有するフィルム部材６０に形成する。つまり、タッチセンサ本体１０の面１１に対して部位６１Ａ、６１Ｂが重なって配置されているタッチセンサ１Ａが得られる。なお、タッチセンサ１Ａでは、部位６１Ａは面１１に密着し、部位６１Ａ、６１Ｂどうしの間も密着している。つまり、部位６１Ａと面１１との間に加えて、部位６１Ａと部位６１Ｂの間にも透明粘着剤（ＯＣＡ）を介在させることなく少ない工数でタッチセンサ１Ａを得ることができる。 The manufacturing method of the touch sensor 1A will be described below. In the first step, the resin film 100 is disposed around the outer periphery of the touch sensor body 10 so that the surface 11 of the touch sensor body 10 is double covered with the two portions of the resin film 100. That is, in the first step, the resin film 100 is disposed so as to be wound about approximately one and a half times around the outer periphery of the touch sensor body 10. And it is formed in the film member 60 which has the site | part 61A and the site | part 61B which closely_contact | adhere and overlap by shrink | contracting the resin film 100 at a 2nd process. That is, the touch sensor 1 </ b> A in which the portions 61 </ b> A and 61 </ b> B are arranged so as to overlap the surface 11 of the touch sensor body 10 is obtained. In the touch sensor 1A, the part 61A is in close contact with the surface 11, and the parts 61A and 61B are also in close contact with each other. That is, the touch sensor 1A can be obtained with a small number of man-hours without interposing the transparent adhesive (OCA) between the part 61A and the part 61B in addition to the part 61A and the surface 11.
　タッチセンサ１Ａでは、ＬＣＤなどの表示装置５０１から入射される直線偏光はフィルム部材６０の部位６２、６１Ａ、６１Ｂを介して出射する。フィルム部材６０の部位６２、６１Ａ、６１Ｂは共に一軸延伸の樹脂フィルム１００を収縮させて形成されているので、フィルム部材６０の３つの部位６１Ａ、６１Ｂ、６２の光軸の方向はほぼ揃っている。例えば前述のＰＥＴフィルムを樹脂フィルム１００として用いた場合、タッチセンサ１Ａでの、波長５５０ｎｍの光のリタデーション値は３０００ｎｍ～４５００ｎｍの略三倍のリタデーション値になる。つまり、一軸延伸の樹脂フィルム１００を収縮させてフィルム部材６０とする場合、リタデーション値の総値は、フィルム部材６０の配置した部位の数をフィルム部材６０のリタデーション値に乗じた積とほぼ等しいので光学特性の向上を図れる。なお、リタデーション値の総値はフィルム部材６０のタッチセンサ本体１０の面１１、１２を覆う部位の数で調整することが可能である。なお、高いリタデーション値の構成である場合には、タッチセンサ本体１０の樹脂シートからなる基板３１、基板３２についての限定は少なくなる。例えば二軸延伸のＰＥＴシートを基板３１、基板３２に用いても虹見えなどの抑制を図れる可能性を有する。 In the touch sensor 1A, linearly polarized light incident from a display device 501 such as an LCD is emitted through the portions 62, 61A, and 61B of the film member 60. Since the parts 62, 61A, 61B of the film member 60 are formed by shrinking the uniaxially stretched resin film 100, the directions of the optical axes of the three parts 61A, 61B, 62 of the film member 60 are substantially aligned. . For example, when the above-described PET film is used as the resin film 100, the retardation value of light having a wavelength of 550 nm in the touch sensor 1A is approximately three times that of 3000 nm to 4500 nm. That is, when the uniaxially stretched resin film 100 is contracted to form the film member 60, the total value of the retardation values is substantially equal to the product of the number of portions where the film members 60 are arranged multiplied by the retardation value of the film members 60. The optical characteristics can be improved. In addition, the total value of the retardation value can be adjusted by the number of parts covering the surfaces 11 and 12 of the touch sensor body 10 of the film member 60. In addition, when it is the structure of a high retardation value, the limitation about the board | substrate 31 and the board | substrate 32 which consist of a resin sheet of the touch sensor main body 10 decreases. For example, even if a biaxially stretched PET sheet is used for the substrate 31 and the substrate 32, there is a possibility that the rainbow appearance and the like can be suppressed.
　図３Ｂは実施形態におけるさらに他のタッチセンサ１Ｂの断面図である。図３Ｂにおいて図３Ａに示すタッチセンサ１Ａと同じ部分には同じ参照番号を付す。図３Ｂに示すタッチセンサ１Ｂでは、部位６２がフィルム部材６０の互いに重なった複数の部位で構成されている。 FIG. 3B is a cross-sectional view of still another touch sensor 1B in the embodiment. 3B, the same reference numerals are given to the same portions as those of the touch sensor 1A shown in FIG. 3A. In the touch sensor 1 </ b> B shown in FIG. 3B, the part 62 is composed of a plurality of parts of the film member 60 that overlap each other.
　図３Ｂに示すタッチセンサ１Ｂでは、フィルム部材６０のタッチセンサ本体１０の面１２に重なる部位６２がタッチセンサ本体１０の面１２を覆う部位６２Ａと、部位６２Ａを覆う部位６２Ｂとを有する。その他の構成はタッチセンサ１Ａと同じである。部位６２Ａ、６２Ｂは互いに密着して重なり合っている。部位６２Ａは、図１Ａと図１Ｂと図２と図３Ａに示すタッチセンサ１、１Ａと同様にタッチセンサ本体１０の面１２に密着して固定されている。フィルム部材６０の部位６２Ｂは部位６２Ａに密着して重なっている。このように、フィルム部材６０の部位６２Ａはタッチセンサ本体１０の面１２を覆う。フィルム部材６０の部位６２Ｂは部位６２Ａを介してタッチセンサ本体１０の面１２を覆う。 In the touch sensor 1B shown in FIG. 3B, a portion 62 of the film member 60 that overlaps the surface 12 of the touch sensor body 10 has a portion 62A that covers the surface 12 of the touch sensor body 10 and a portion 62B that covers the portion 62A. Other configurations are the same as those of the touch sensor 1A. The parts 62A and 62B are in close contact with each other and overlap. The part 62A is fixed in close contact with the surface 12 of the touch sensor body 10 in the same manner as the touch sensors 1 and 1A shown in FIGS. 1A, 1B, 2 and 3A. The part 62B of the film member 60 is in close contact with and overlaps the part 62A. Thus, the part 62 </ b> A of the film member 60 covers the surface 12 of the touch sensor main body 10. The part 62B of the film member 60 covers the surface 12 of the touch sensor main body 10 via the part 62A.
　タッチセンサ１Ｂの製造方法を以下に説明する。上記の第一工程で、タッチセンサ本体１０の面１１を樹脂フィルム１００の２つの部位で二重に覆い、かつタッチセンサ本体１０の面１２を樹脂フィルム１００の２つの部位で二重に覆うようにタッチセンサ本体１０の外周に樹脂フィルム１００を巻くように配置する。つまり、第一工程では、樹脂フィルム１００をタッチセンサ本体１０の外周のほぼ二周程度巻くように配置する。そして、第二工程で樹脂フィルム１００を収縮させることによって、密着して重なり合う部位６１Ａ、６１Ｂと、密着して重なり合う部位６２Ａ、６２Ｂとを有するフィルム部材６０に形成する。つまり、タッチセンサ本体１０の面１１に対して部位６１Ａ、６１Ｂが重なって配置され、かつタッチセンサ本体１０の面１２に対して部位６２Ａ、６２Ｂが重なって配置されているタッチセンサ１Ｂが得られる。なお、タッチセンサ１Ｂでは、部位６２Ａは面１２に密着し、部位６２Ａ、６２Ｂどうしの間も密着している。つまり、部位６２Ａと面１２との間に加えて、部位６２Ａと部位６２Ｂの間にも透明粘着剤（ＯＣＡ）を介在させることなく少ない工数でタッチセンサ１Ｂを得ることができる。 The manufacturing method of the touch sensor 1B will be described below. In the first step, the surface 11 of the touch sensor body 10 is doubly covered with the two parts of the resin film 100, and the face 12 of the touch sensor body 10 is doubly covered with the two parts of the resin film 100. The resin film 100 is arranged around the outer periphery of the touch sensor body 10. That is, in the first step, the resin film 100 is disposed so as to be wound approximately twice around the outer periphery of the touch sensor body 10. Then, the resin film 100 is contracted in the second step to form the film member 60 having the portions 61A and 61B that are in close contact with each other and the portions 62A and 62B that are in close contact and overlap with each other. That is, the touch sensor 1B in which the parts 61A and 61B are arranged so as to overlap the surface 11 of the touch sensor main body 10 and the parts 62A and 62B are arranged so as to overlap the surface 12 of the touch sensor main body 10 is obtained. . In the touch sensor 1B, the part 62A is in close contact with the surface 12, and the parts 62A and 62B are also in close contact with each other. That is, the touch sensor 1B can be obtained with a small number of man-hours without interposing a transparent adhesive (OCA) between the part 62A and the part 62B in addition to the part 62A and the surface 12.
　タッチセンサ１Ｂでは、ＬＣＤなどの表示装置５０１から入射される直線偏光はフィルム部材６０の部位６２Ｂ、６２Ａ、６１Ａ、６１Ｂを介して出射する。フィルム部材６０の部位６１Ａ、６１Ｂ、６２Ａ、６２Ｂは共に一軸延伸の樹脂フィルム１００を収縮させて形成されているので、フィルム部材６０の４つの部位６１Ａ、６１Ｂ、６２Ａ、６２Ｂの光軸の方向はほぼ揃っている。例えば前述のＰＥＴフィルムを樹脂フィルム１００として用いた場合、タッチセンサ１Ａでの、波長５５０ｎｍの光のリタデーション値は３０００ｎｍ～４５００ｎｍの略四倍のリタデーション値になる。つまり、一軸延伸の樹脂フィルム１００を収縮させてフィルム部材６０とする場合、リタデーション値の総値は、フィルム部材６０の配置した部位の数をフィルム部材６０のリタデーション値に乗じた積とほぼ等しいので光学特性の向上を図れる。 In the touch sensor 1B, linearly polarized light incident from a display device 501 such as an LCD is emitted through the portions 62B, 62A, 61A, 61B of the film member 60. Since the parts 61A, 61B, 62A and 62B of the film member 60 are all formed by shrinking the uniaxially stretched resin film 100, the directions of the optical axes of the four parts 61A, 61B, 62A and 62B of the film member 60 are Almost complete. For example, when the above-described PET film is used as the resin film 100, the retardation value of light having a wavelength of 550 nm in the touch sensor 1A is approximately four times that of 3000 nm to 4500 nm. That is, when the uniaxially stretched resin film 100 is contracted to form the film member 60, the total value of the retardation values is substantially equal to the product of the number of portions where the film members 60 are arranged multiplied by the retardation value of the film members 60. The optical characteristics can be improved.
　なお、タッチセンサ１Ｂにおいて、フィルム部材６０はタッチセンサ本体１０の面１１を覆うフィルム部材６０の部位６１Ａ、６１Ｂのうち６１Ｂを有していなくてもよい。この場合には、タッチセンサ１Ａと同様に、フィルム部材６０の略三倍のリタデーション値が得られる。このタッチセンサを作製する場合には、フィルム部材６０は周回方向Ｄ１の反対の周回方向にタッチセンサ本体１０に周回させる。 In the touch sensor 1B, the film member 60 may not have 61B among the portions 61A and 61B of the film member 60 that covers the surface 11 of the touch sensor main body 10. In this case, similar to the touch sensor 1A, a retardation value approximately three times that of the film member 60 is obtained. When producing this touch sensor, the film member 60 is caused to circulate around the touch sensor body 10 in the circumferential direction opposite to the circumferential direction D1.
　図３Ｃは実施形態におけるさらに他のタッチセンサ１Ｃの断面図である。図３Ｃにおいて図３Ａと図３Ｂに示すタッチセンサ１Ａ、１Ｂと同じ部分には同じ参照番号を付す。図３Ｃに示すタッチセンサ１Ｂでは、フィルム部材６０が重なっている位置が異なる。 FIG. 3C is a cross-sectional view of still another touch sensor 1C in the embodiment. In FIG. 3C, the same reference numerals are given to the same portions as those of the touch sensors 1A and 1B shown in FIGS. 3A and 3B. In the touch sensor 1B shown in FIG. 3C, the position where the film member 60 overlaps is different.
　図３Ｃに示すタッチセンサ１Ｃでは、図３Ｂに示すタッチセンサ１Ｂと同様に、フィルム部材６０のタッチセンサ本体１０の面１２に重なる部位６２がタッチセンサ本体１０の面１２を覆う部位６２Ａと、部位６２Ａを覆う部位６２Ｂとを有する。フィルム部材６０はタッチセンサ本体１０の面１１に密着して固定されている部位６１を有する。 In the touch sensor 1C shown in FIG. 3C, similarly to the touch sensor 1B shown in FIG. 3B, the part 62A that overlaps the surface 12 of the touch sensor body 10 of the film member 60 covers the surface 12 of the touch sensor body 10, and the part And a portion 62B covering 62A. The film member 60 has a portion 61 that is fixed in close contact with the surface 11 of the touch sensor body 10.
　実施形態におけるタッチセンサ１、１Ａ、１Ｂでは、タッチセンサ本体１０は基板３１、３２を含む。実施形態におけるタッチセンサの変形例としては、基板３１に電極２１、２２が配置され、タッチセンサ本体１０は基板３２を有しなくてもよい。 In the touch sensors 1, 1 </ b> A, and 1 </ b> B in the embodiment, the touch sensor main body 10 includes substrates 31 and 32. As a modification of the touch sensor in the embodiment, the electrodes 21 and 22 are disposed on the substrate 31, and the touch sensor main body 10 may not have the substrate 32.
　また、タッチセンサ１、１Ａ、１Ｂにおいては、タッチセンサ本体１０の面１１に設けられた加飾部５１はフィルム部材６０で覆われるため、加飾部５１の保護も可能である。なお、フィルム部材６０の内面側に加飾部を設けてもよい。 Further, in the touch sensors 1, 1 </ b> A, and 1 </ b> B, the decoration part 51 provided on the surface 11 of the touch sensor body 10 is covered with the film member 60, so that the decoration part 51 can be protected. In addition, you may provide a decoration part in the inner surface side of the film member 60. FIG.
　図４Ａは実施形態におけるさらに他のタッチセンサ２の平面図である。図４Ｂは図４Ａに示すタッチセンサ２の線ＩＶＢ－ＩＶＢにおける断面図である。図４Ａと図４Ｂにおいて、図１Ａと図１Ｂに示すタッチセンサ１と同じ部分には同じ参照番号を付す。 FIG. 4A is a plan view of still another touch sensor 2 in the embodiment. 4B is a cross-sectional view of touch sensor 2 shown in FIG. 4A along line IVB-IVB. 4A and 4B, the same reference numerals are assigned to the same parts as those of the touch sensor 1 shown in FIGS. 1A and 1B.
　図４Ａと図４Ｂに示すように、タッチセンサ２は、タッチセンサ本体１０Ａと、タッチセンサ本体１０Ａの外周に固定されて配置されたフィルム部材６５とを有する。タッチセンサ本体１０Ａは、所定厚みの剛体製の基板部材７０と、センサ電極７１と、外部接続用のフレキシブル回路（ＦＰＣ）基板８０とを含む。タッチセンサ本体１０Ａは図１Ｂに示すタッチセンサ１のカバーレンズ５０は有しない構成である。 As shown in FIGS. 4A and 4B, the touch sensor 2 includes a touch sensor main body 10A and a film member 65 that is fixed to the outer periphery of the touch sensor main body 10A. The touch sensor main body 10A includes a rigid board member 70 having a predetermined thickness, a sensor electrode 71, and a flexible circuit (FPC) board 80 for external connection. The touch sensor body 10A does not include the cover lens 50 of the touch sensor 1 shown in FIG. 1B.
　タッチセンサ本体１０Ａの詳細構成について説明する。基板部材７０は略直方体形状を有し、表面とその反対の裏面とを有する。基板部材７０の裏面にはセンサ電極７１が配置されている。また、センサ電極７１からの引き回し配線の終端に形成された端子部７３も基板部材７０の裏面に設置されている。センサ電極７１が配設された領域には裏面に保護層７５が重ねられている。つまり、センサ電極７１は保護層７５で覆われている。保護層７５は必要に応じて設ければよく、タッチセンサ本体１０Ａは保護層７５を有していなくてもよい。端子部７３には導電接着剤を介して外部接続用のＦＰＣ基板８０が接続されている。 The detailed configuration of the touch sensor body 10A will be described. The substrate member 70 has a substantially rectangular parallelepiped shape, and has a front surface and a back surface opposite to the front surface. A sensor electrode 71 is disposed on the back surface of the substrate member 70. In addition, a terminal portion 73 formed at the end of the routing wiring from the sensor electrode 71 is also installed on the back surface of the substrate member 70. In the region where the sensor electrode 71 is provided, a protective layer 75 is overlaid on the back surface. That is, the sensor electrode 71 is covered with the protective layer 75. The protective layer 75 may be provided as necessary, and the touch sensor body 10 </ b> A may not have the protective layer 75. An external connection FPC board 80 is connected to the terminal portion 73 via a conductive adhesive.
　なお、基板部材７０は例えばＰＣ樹脂などの樹脂体やガラス等の透光部材よりなる。基板部材７０は光等方性を有すると望ましい。なお、センサ電極７１は基板部材７０の裏面に設けられた溝内に配置されているが、基板部材７０の裏面に溝は設けられていなくてもよく平坦であってもよい。センサ電極７１などは基板部材７０の表面等に設けられていてもよい。 The substrate member 70 is made of, for example, a resin body such as PC resin or a translucent member such as glass. The substrate member 70 is desirably optically isotropic. Although the sensor electrode 71 is disposed in a groove provided on the back surface of the substrate member 70, the groove may not be provided on the back surface of the substrate member 70, and may be flat. The sensor electrode 71 or the like may be provided on the surface of the substrate member 70 or the like.
　以上のように構成されたタッチセンサ本体１０Ａでは、基板部材７０の表面がタッチセンサ本体の面１１Ａを構成する。タッチセンサ本体１０Ａの面１１Ａとは反対の面１２Ａは、基板部材７０の裏面側で表出しているＦＰＣ基板８０の外面や保護層７５の外面などを含んで構成されている。そして、タッチセンサ本体１０Ａは、面１１Ａ、１２Ａの間を繋ぐ側面部１３Ａと、側面部１３Ａに対向する位置で面１１Ａ、１２Ａの間を繋ぐ側面部１４Ａをさらに有している。ＦＰＣ基板８０は側面部１４Ａから突出している。 In the touch sensor main body 10A configured as described above, the surface of the substrate member 70 forms the surface 11A of the touch sensor main body. The surface 12A opposite to the surface 11A of the touch sensor main body 10A includes the outer surface of the FPC board 80 exposed on the back surface side of the substrate member 70, the outer surface of the protective layer 75, and the like. The touch sensor body 10A further includes a side surface portion 13A that connects the surfaces 11A and 12A, and a side surface portion 14A that connects the surfaces 11A and 12A at a position facing the side surface portion 13A. The FPC board 80 protrudes from the side surface portion 14A.
　フィルム部材６５は、タッチセンサ本体１０Ａの外周に固定されて配置されている。フィルム部材６５は互いに反対の端６５Ｐ、６５Ｑを有する。フィルム部材６５は、タッチセンサ本体１０Ａの側面部１４Ａ、面１１Ａ、側面部１３Ａ、面１２Ａ、側面部１４Ａの順に周回方向Ｄ２に周回されて配置されている。側面部１４Ａ上でフィルム部材６５の端６５Ｐ、６５Ｑをそれぞれ含む端部６５Ｓ、６５Ｔが接合されている。なお、フィルム部材６５は面１１Ａに対して密着している。また、フィルム部材６５は面１２Ａのセンサ電極７１の設置領域にも密着している。面１２Ａは、例えばＦＰＣ基板８０と保護層７５との間の間隙を含むので、その間隙以外の箇所ではフィルム部材６５は面１２Ａに密着している。フィルム部材６５は、側面部１４Ａから突出するＦＰＣ基板８０を逃がすための孔部９０を有し、孔部９０からＦＰＣ基板８０のテール部は外方に突出している。なお、フィルム部材６５は、タッチセンサ１、１Ａ、１Ｂの場合と同様に、一軸延伸の樹脂フィルムを熱で収縮させて形成している。孔部９０はフィルム部材６５でその全周を囲まれている。 The film member 65 is fixed and arranged on the outer periphery of the touch sensor body 10A. The film member 65 has opposite ends 65P and 65Q. The film member 65 is arranged in the circumferential direction D2 in the order of the side surface portion 14A, the surface 11A, the side surface portion 13A, the surface 12A, and the side surface portion 14A of the touch sensor main body 10A. End portions 65S and 65T including the ends 65P and 65Q of the film member 65 are joined on the side surface portion 14A. The film member 65 is in close contact with the surface 11A. The film member 65 is also in close contact with the installation area of the sensor electrode 71 on the surface 12A. Since the surface 12A includes, for example, a gap between the FPC board 80 and the protective layer 75, the film member 65 is in close contact with the surface 12A at a place other than the gap. The film member 65 has a hole 90 for allowing the FPC board 80 protruding from the side surface part 14 </ b> A to escape, and a tail part of the FPC board 80 protrudes outward from the hole 90. The film member 65 is formed by shrinking a uniaxially stretched resin film with heat, as in the case of the touch sensors 1, 1 </ b> A, and 1 </ b> B. The hole 90 is surrounded by the film member 65 on the entire circumference.
　図５はタッチセンサ２の製造過程を示す。準備工程でタッチセンサ本体１０Ａを準備する。タッチセンサ本体１０ＡはＦＰＣ基板８０を含み、面１１Ａ、１２Ａと側面部１３Ａ、１４Ａとを有する。そして、図５に示すように、第一工程で、上述同様に樹脂フィルム１００をタッチセンサ本体１０Ａの外周に周回方向Ｄ２に周回させて筒形状に配置した仕掛品２００Ａに製作する。つまり、仕掛品２００Ａでは、筒形状を有する樹脂フィルム１００の内部にタッチセンサ本体１０Ａが位置する。 FIG. 5 shows the manufacturing process of the touch sensor 2. The touch sensor body 10A is prepared in the preparation process. The touch sensor main body 10A includes an FPC board 80, and has surfaces 11A and 12A and side portions 13A and 14A. Then, as shown in FIG. 5, in the first step, the resin film 100 is produced in the work-in-progress 200 </ b> A arranged in the cylindrical shape by circling around the outer circumference of the touch sensor main body 10 </ b> A in the circumferential direction D <b> 2 as described above. That is, in the work-in-process 200A, the touch sensor main body 10A is located inside the cylindrical resin film 100.
　なお、第一工程で用いる樹脂フィルム１００には、ＦＰＣ基板８０を貫通させる孔部１１０が予め設けられている。図５に示すように、仕掛品２００Ａを作製する際にＦＰＣ基板８０を孔部１１０に挿通させる。孔部１１０は樹脂フィルム１００でその全周を囲まれている。孔部１１０の樹脂フィルム１００の収縮する方向である延伸方向Ｄｅでの幅は収縮する量を見込んで大きく設定する。延伸方向Ｄｅに直角の方向では樹脂フィルム１００はほとんど収縮しないので、その方向の孔部１１０の幅はＦＰＣ基板８０を挿通可能な程度に設定する。なお、ＦＰＣ基板８０の端子部との接続箇所を含めてフィルム部材６５で外方から保護してもよいし、樹脂フィルム１００で覆われていなくてもよい。なお、樹脂フィルム１００の孔部１１０は、端６５Ｑで開放されている切り欠き形状を有していてもよい。 Note that the resin film 100 used in the first step is provided with a hole 110 through which the FPC board 80 passes. As shown in FIG. 5, the FPC board 80 is inserted through the hole 110 when the work-in-process 200 </ b> A is manufactured. The hole 110 is surrounded by the resin film 100 all around. The width in the stretching direction De, which is the direction in which the resin film 100 shrinks, of the hole 110 is set to be large in consideration of the shrinkage amount. Since the resin film 100 hardly shrinks in the direction perpendicular to the stretching direction De, the width of the hole 110 in that direction is set to such an extent that the FPC board 80 can be inserted. It should be noted that the film member 65 may be protected from the outside including the connection portion with the terminal portion of the FPC board 80 or may not be covered with the resin film 100. In addition, the hole part 110 of the resin film 100 may have a notch shape opened at the end 65Q.
　そして、第二工程で仕掛品２００Ａに上述同様に熱での処理を行って樹脂フィルム１００を収縮させてタッチセンサ２を製造する。なお、基板部材７０の厚さや材質は、樹脂フィルム１００の収縮時に基板部材７０に大きい変形などを生じないように設定されている。 Then, in the second step, the work-in-process 200A is treated with heat in the same manner as described above to shrink the resin film 100, and the touch sensor 2 is manufactured. The thickness and material of the substrate member 70 are set so that the substrate member 70 is not greatly deformed when the resin film 100 contracts.
　そして、上述した工程で得られるタッチセンサ２は、例えば樹脂フィルム１００として上述したＰＥＴフィルムを用いると、フィルム部材６５のタッチセンサ本体１０Ａの面１１Ａを覆う部位６６と面１２Ａを覆う部位６７とがそれぞれ位相差板として機能する。つまり、波長５５０ｎｍの位相差が６０００ｎｍ～９０００ｎｍ程度のタッチセンサ２を得られる。 And the touch sensor 2 obtained by the process mentioned above, when the PET film mentioned above is used as the resin film 100, for example, the site | part 66 which covers the surface 11A of the touch sensor main body 10A of the film member 65, and the site | part 67 which covers the surface 12A. Each functions as a phase difference plate. That is, the touch sensor 2 having a phase difference of about 6000 nm to 9000 nm can be obtained.
　なお、上記では、樹脂フィルム１００の事例として一軸延伸のＰＥＴフィルムを用いている。ＰＥＴフィルムの厚みは必要な光学特性などに応じて選択してもよいが、１００μｍ以下の厚みが望ましい。ＰＥＴフィルムが厚いと収縮時にしわの発生も生じやすくなるため、厚みが３０μｍから５０μｍのＰＥＴフィルムを用いることが望ましい。また、一軸延伸のＰＥＴフィルム以外の素材の樹脂フィルム１００を用いることも可能である。収縮後のリタデーション値はＰＥＴよりも小さいが、例えば一軸延伸のオレフィン系の樹脂フィルム、一軸延伸のスチレン系の樹脂フィルム等を用いてもよい。そして、これらの樹脂フィルムを収縮させる際の温度は材料に応じて適宜設定する。 In the above, a uniaxially stretched PET film is used as an example of the resin film 100. The thickness of the PET film may be selected according to necessary optical characteristics, but a thickness of 100 μm or less is desirable. If the PET film is thick, wrinkles are likely to occur at the time of shrinkage. Therefore, it is desirable to use a PET film having a thickness of 30 μm to 50 μm. It is also possible to use a resin film 100 made of a material other than a uniaxially stretched PET film. Although the retardation value after shrinkage is smaller than that of PET, for example, a uniaxially stretched olefin resin film, a uniaxially stretched styrene resin film, or the like may be used. And the temperature at the time of shrinking these resin films is suitably set according to material.
１，１Ａ，１Ｂ，２　　タッチセンサ
１０，１０Ａ　　タッチセンサ本体
２１　　電極
２２　　電極
３１　　基板
３２　　基板
４１，４２　　透明粘着剤
５０　　カバーレンズ
５１　　加飾部
６０，６５　　フィルム部材
７０　　基板部材
７１　　センサ電極
７３　　端子部
７５　　保護層
８０　　ＦＰＣ基板
９０　　孔部
１００　　樹脂フィルム
１１０　　孔部
２００，２００Ａ　　仕掛品 1, 1A, 1B, 2 Touch sensor 10, 10A Touch sensor body 21 Electrode 22 Electrode 31 Substrate 32 Substrate 41, 42 Transparent adhesive 50 Cover lens 51 Decorating part 60, 65 Film member 70 Substrate member 71 Sensor electrode 73 Terminal part 75 Protective layer 80 FPC board 90 Hole 100 Resin film 110 Hole 200, 200A Work in progress

Claims (12)

  1. 第一面および前記第一面とは反対の第二面とを有するタッチセンサ本体と、
    前記第一面を覆う第一の部位と前記第二面を覆う第二の部位とを含み、前記タッチセンサ本体を囲むように配置されて前記タッチセンサ本体に固定された一軸延伸の樹脂フィルム製のフィルム部材と、
    を備えたタッチセンサ。     A touch sensor body having a first surface and a second surface opposite to the first surface;
    A uniaxially stretched resin film that includes a first part that covers the first surface and a second part that covers the second surface, is disposed so as to surround the touch sensor body, and is fixed to the touch sensor body. A film member of
    Touch sensor equipped with.
  2. 前記フィルム部材の前記第一の部位と前記第二の部位とは位相差板として機能する、請求項１に記載のタッチセンサ。 The touch sensor according to claim 1, wherein the first part and the second part of the film member function as a phase difference plate.
  3. 前記第一の部位は前記タッチセンサ本体の前記第一面に密着し、前記第二の部位は前記タッチセンサ本体の前記第二面に密着する、請求項１に記載のタッチセンサ。 The touch sensor according to claim 1, wherein the first part is in close contact with the first surface of the touch sensor body, and the second part is in close contact with the second surface of the touch sensor body.
  4. 前記フィルム部材はＰＥＴ製であり、
    前記フィルム部材の波長５５０ｎｍの光の位相差は３０００ｎｍ～４５００ｎｍである、請求項１に記載のタッチセンサ。     The film member is made of PET,
    The touch sensor according to claim 1, wherein a phase difference of light having a wavelength of 550 nm of the film member is 3000 nm to 4500 nm.
  5. 前記フィルム部材は前記タッチセンサ本体を少なくとも一周囲む、請求項１に記載のタッチセンサ。 The touch sensor according to claim 1, wherein the film member surrounds at least one circumference of the touch sensor main body.
  6. 第一面および前記第一面とは反対の第二面とを有するタッチセンサ本体を準備するステップと、
    一軸延伸の樹脂フィルムを準備するステップと、
    前記タッチセンサ本体の前記第一面と前記第二面とを覆って前記タッチセンサ本体を囲むように前記一軸延伸の樹脂フィルムを配置するステップと、
    前記一軸延伸の樹脂フィルムを配置する前記ステップの後で、前記一軸延伸の樹脂フィルムを収縮させてフィルム部材を形成し、前記フィルム部材が前記タッチセンサ本体の前記第一面と前記第二面とにそれぞれ重なる第一の部位と第二の部位とを有するように前記フィルム部材を前記タッチセンサ本体に固定するステップと、
    を含む、タッチセンサの製造方法。     Providing a touch sensor body having a first surface and a second surface opposite to the first surface;
    Preparing a uniaxially stretched resin film;
    Disposing the uniaxially stretched resin film so as to cover the first surface and the second surface of the touch sensor body and surround the touch sensor body;
    After the step of disposing the uniaxially stretched resin film, the uniaxially stretched resin film is contracted to form a film member, and the film member includes the first surface and the second surface of the touch sensor body. Fixing the film member to the touch sensor main body so as to have a first part and a second part respectively overlapping with each other,
    A method for manufacturing a touch sensor.
  7. 前記フィルム部材の前記第一の部位と前記第二の部位とは位相差板として機能する、請求項６に記載のタッチセンサの製造方法。 The touch sensor manufacturing method according to claim 6, wherein the first part and the second part of the film member function as a phase difference plate.
  8. 前記一軸延伸の樹脂フィルムはＰＥＴ製であり、
    前記フィルム部材の波長５５０ｎｍの光の位相差は３０００ｎｍ～４５００ｎｍである、請求項６に記載のタッチセンサの製造方法。     The uniaxially stretched resin film is made of PET,
    The method for manufacturing a touch sensor according to claim 6, wherein the phase difference of light having a wavelength of 550 nm of the film member is 3000 nm to 4500 nm.
  9. 前記フィルム部材は前記タッチセンサ本体の前記第一面上で重なっている、請求項６に記載のタッチセンサの製造方法。 The touch sensor manufacturing method according to claim 6, wherein the film member overlaps the first surface of the touch sensor body.
  10. 前記一軸延伸の樹脂フィルムはハードコート層を有し、
    前記一軸延伸の樹脂フィルムを配置する前記ステップは、前記ハードコート層を外方に向けて前記タッチセンサ本体を囲むように前記一軸延伸の樹脂フィルムを配置するステップを含む、請求項６に記載のタッチセンサの製造方法。     The uniaxially stretched resin film has a hard coat layer,
    The step of disposing the uniaxially stretched resin film includes a step of disposing the uniaxially stretched resin film so as to surround the touch sensor body with the hard coat layer facing outward. A manufacturing method of a touch sensor.
  11. 前記一軸延伸の樹脂フィルムを準備する前記ステップは、延伸方向に延伸された一軸延伸の樹脂フィルムを準備するステップを含み、
    前記一軸延伸の樹脂フィルムを配置する前記ステップは、前記タッチセンサ本体の前記第一面と前記第二面とを覆って前記タッチセンサ本体を周回方向に周回させて囲むように前記一軸延伸の樹脂フィルムを配置するステップを含み、
    前記一軸延伸の樹脂フィルムの前記延伸方向は前記周回方向に一致する、請求項６に記載のタッチセンサの製造方法。     The step of preparing the uniaxially stretched resin film includes the step of preparing a uniaxially stretched resin film stretched in the stretching direction,
    The step of disposing the uniaxially stretched resin film includes the uniaxially stretched resin so as to cover the first surface and the second surface of the touch sensor body so as to surround the touch sensor body in a circumferential direction. Including placing a film;
    The touch sensor manufacturing method according to claim 6, wherein the stretching direction of the uniaxially stretched resin film coincides with the rotating direction.
  12. 前記一軸延伸の樹脂フィルムを配置する前記ステップは、前記タッチセンサ本体を少なくとも一周囲むように前記一軸延伸の樹脂フィルムを配置するステップを含む、請求項６に記載のタッチセンサの製造方法。 The touch sensor manufacturing method according to claim 6, wherein the step of disposing the uniaxially stretched resin film includes a step of disposing the uniaxially stretched resin film so as to surround at least one circumference of the touch sensor body.
PCT/JP2017/041412 2017-02-02 2017-11-17 Touch sensor and method for producing touch sensor WO2018142724A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000231450A (en) * 1999-02-10 2000-08-22 Toyobo Co Ltd Transparent conductive film, touch panel and liquid crystal display element
US20080206498A1 (en) * 2007-02-23 2008-08-28 Peter Allen Shrink wrap sleeves for electronic devices
JP2014056102A (en) * 2012-09-12 2014-03-27 Toyobo Co Ltd Heat shrinkable plastic film and tube made of heat shrinkable plastic film, and method for using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000231450A (en) * 1999-02-10 2000-08-22 Toyobo Co Ltd Transparent conductive film, touch panel and liquid crystal display element
US20080206498A1 (en) * 2007-02-23 2008-08-28 Peter Allen Shrink wrap sleeves for electronic devices
JP2014056102A (en) * 2012-09-12 2014-03-27 Toyobo Co Ltd Heat shrinkable plastic film and tube made of heat shrinkable plastic film, and method for using the same

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