WO2018142724A1 - Capteur tactile et procédé de production de capteur tactile - Google Patents

Capteur tactile et procédé de production de capteur tactile 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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WIPO (PCT)
Prior art keywords
touch sensor
resin film
film
uniaxially stretched
film member
Prior art date
Application number
PCT/JP2017/041412
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English (en)
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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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/fr

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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.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

L'invention concerne un capteur tactile comprenant : un corps de capteur tactile ; et un élément de film constitué d'un film de résine étiré uniaxialement fixé au corps de capteur tactile. L'élément de film comprend des parties recouvrant chaque surface mutuellement opposée du corps de capteur tactile. Le capteur tactile est configuré de telle sorte que l'élément de film constitué d'un film de résine étiré uniaxialement peut être fixé au corps de capteur tactile sans utiliser un OCA.
PCT/JP2017/041412 2017-02-02 2017-11-17 Capteur tactile et procédé de production de capteur tactile WO2018142724A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-017342 2017-02-02
JP2017017342 2017-02-02

Publications (1)

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WO2018142724A1 true WO2018142724A1 (fr) 2018-08-09

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000231450A (ja) * 1999-02-10 2000-08-22 Toyobo Co Ltd 透明導電性フィルム、タッチパネルおよび液晶表示素子
US20080206498A1 (en) * 2007-02-23 2008-08-28 Peter Allen Shrink wrap sleeves for electronic devices
JP2014056102A (ja) * 2012-09-12 2014-03-27 Toyobo Co Ltd 熱収縮性プラスチックフィルム、熱収縮性プラスチックフィルム製チューブおよびその使用方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000231450A (ja) * 1999-02-10 2000-08-22 Toyobo Co Ltd 透明導電性フィルム、タッチパネルおよび液晶表示素子
US20080206498A1 (en) * 2007-02-23 2008-08-28 Peter Allen Shrink wrap sleeves for electronic devices
JP2014056102A (ja) * 2012-09-12 2014-03-27 Toyobo Co Ltd 熱収縮性プラスチックフィルム、熱収縮性プラスチックフィルム製チューブおよびその使用方法

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