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WO2010038466A1 - Panneau tactile et feuille piézoélectrique transparente - Google Patents

Panneau tactile et feuille piézoélectrique transparente Download PDF

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Publication number
WO2010038466A1
WO2010038466A1 PCT/JP2009/005074 JP2009005074W WO2010038466A1 WO 2010038466 A1 WO2010038466 A1 WO 2010038466A1 JP 2009005074 W JP2009005074 W JP 2009005074W WO 2010038466 A1 WO2010038466 A1 WO 2010038466A1
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WO
WIPO (PCT)
Prior art keywords
transparent
plate electrode
flat plate
sheet
touch panel
Prior art date
Application number
PCT/JP2009/005074
Other languages
English (en)
Japanese (ja)
Inventor
小谷哲浩
向井恵吏
高明天
金村崇
表研次
大東弘二
Original Assignee
ダイキン工業株式会社
株式会社イデアルスター
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.)
Filing date
Publication date
Application filed by ダイキン工業株式会社, 株式会社イデアルスター filed Critical ダイキン工業株式会社
Priority to KR1020117008934A priority Critical patent/KR101273221B1/ko
Priority to CN200980138308XA priority patent/CN102165400A/zh
Publication of WO2010038466A1 publication Critical patent/WO2010038466A1/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
    • G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
    • H10N30/302—Sensors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Definitions

  • the present invention relates to a touch panel and a transparent piezoelectric sheet.
  • a display and input device in which a touch panel, which is an input device, is installed on the front surface of a display device such as a liquid crystal display has been put into practical use and is used for an operation panel of a portable device such as a mobile phone and a home appliance.
  • a display and input device using a touch panel enables a user to operate the device intuitively by pressing a display on the screen.
  • the touch panel that has been put to practical use so far can only detect the position pressed by the user (sometimes referred to as a touch position in the present specification), and the strength pressed by the user (that is, the height of the press). (Strength), which may be referred to as touch pressure in this specification) could not be detected.
  • Patent Document 1 discloses a piezoelectric body used as a member of electronic paper and one of the piezoelectric bodies.
  • a touch panel unit having a first electrode provided on the side and a second electrode provided on the other side of the piezoelectric body is disclosed.
  • Patent Document 2 discloses a first sensor system that is coupled to a touch screen and determines a set of position coordinates for each contact of the touch screen, and is coupled to the touch screen and is touched by a first type object.
  • a touch screen system comprising: a second sensor system that confirms each touch on the screen and invalidates each touch on the touch screen with a second type of object;
  • a force sensor disposed outside the visual region of the LCD is disclosed.
  • Patent Document 3 discloses a transparent pressure-sensitive layer having piezoelectricity between a pair of opposed transparent substrates, A transparent piezoelectric sensor is disclosed, in which a pair of transparent conductive film layers disposed opposite to each other via the transparent pressure sensitive layer is formed.
  • the touch panel unit described in Patent Document 1 can obtain a voltage pulse corresponding to the pressure, the touch panel unit does not have transparency as an essential requirement, and the transparency is considered insufficient.
  • the touch panel disclosed in Patent Document 1 is a resistive film type, but (a) a capacitance type that can easily detect multiple points, and (b) an ultrasonic type that is suitable for handwriting input and has high durability. And (c) Development of a touch panel capable of detecting the touch pressure as well as the touch position is required for other position detection touch panels having advantages such as optical type with high light transmittance and high durability. It has been. Further, the touch panel disclosed in Patent Document 1 has a problem that it is difficult to divert the existing touch panel manufacturing apparatus that detects only the position pressed by the user.
  • the existing touch panel manufacturing device for touch position detection can be used as it is, or the existing touch position detection touch panel itself can be used as it is. If possible, it is simple, and consequently, the manufacturing cost can be reduced. Since the touch screen described in Patent Document 2 can determine false contact, it can be said that it has proposed a concept of detecting the strength of pressing, but what is actually disclosed specifically is as described above. The deflection of the substrate is detected by a force sensor outside the visual region of the LCD, and its accuracy is not sufficient, and for example, it is considered that linear detection is difficult.
  • the present invention is a touch panel capable of detecting touch pressure (pressure height (strength)) with high accuracy together with a touch position, (1) High transparency, (2) Various position detection methods can be adopted, and (3) In manufacturing, an existing touch panel manufacturing apparatus for touch position detection is used as it is, or existing An object of the present invention is to provide a touch panel or the like that can directly use the touch position detection touch panel itself.
  • the transparent piezoelectric sheet of the first invention is A sheet-like transparent piezoelectric layer; A first transparent flat plate electrode disposed on one surface of the sheet-like transparent piezoelectric layer; A second transparent flat plate electrode disposed on the other surface of the sheet-like transparent piezoelectric layer; Including The first transparent flat plate electrode has a first transparent flat plate electrode portion, The second transparent flat plate electrode has a second transparent flat plate electrode portion, The outline of the first transparent flat plate electrode part includes the outline of the second transparent flat plate electrode part in a plan view, or the outline of the second transparent flat plate electrode part is the first transparent flat plate electrode in a plan view. Includes the outline of the part.
  • the transparent piezoelectric sheet of the present invention can be used for detection of touch pressure.
  • a transparent piezoelectric sheet for touch pressure detection can be obtained.
  • the touch pressure from the upper side of the plate electrode disposed on the surface of the sheet-like transparent piezoelectric layer is directly transmitted to the sheet-like transparent piezoelectric layer, so that the touch pressure can be detected with high accuracy.
  • the outline of the first transparent flat plate electrode part includes the outline of the second transparent flat plate electrode part in a plan view, or the outline of the second transparent flat plate electrode part is the first transparent in a plan view.
  • the allowable range of deviation in plan view between the first transparent flat plate electrode part and the second transparent flat plate electrode part at the time of manufacturing is increased, and the defective product rate at the time of manufacturing is reduced. it can.
  • this configuration it is possible to reliably detect the touch pressure in the entire region within the contour of the narrower area of the first transparent flat plate electrode portion and the second transparent flat plate electrode portion, and as a result (design) It is possible to reliably detect the touch pressure in a wide area.
  • the transparent piezoelectric sheet of the present invention when using the transparent piezoelectric sheet of the present invention in combination with a touch position detection touch panel, an area where both the touch pressure and the touch position can be detected, and the touch position detection area of the touch position detection touch panel, Since it becomes possible to make it highly coincident (that is, the touch position detection area of the touch position detection touch panel can be used effectively), the transparent piezoelectric sheet of the present invention is preferably combined with the touch position detection touch panel. Can be used. As a result, (1) high transparency, (2) various position detection methods can be employed, and (3) an existing touch panel manufacturing apparatus for touch position detection can be used as it is. Alternatively, there is provided a touch panel that can use an existing touch position detection touch panel itself as it is.
  • the transparent piezoelectric sheet of the second invention is the transparent piezoelectric sheet of the first invention,
  • the sheet-like transparent piezoelectric layer has a thickness of 1 to 200 ⁇ m.
  • the transparent piezoelectric sheet according to the present invention has a high sensitivity and a high sensitivity without impairing the sensitivity and accuracy of touch position detection of the touch position detecting touch panel, because the thickness of the sheet-like transparent piezoelectric layer is 1 to 200 ⁇ m.
  • a function of detecting the touch pressure with accuracy can be provided.
  • This thickness is preferably 50 ⁇ m or less from the viewpoint of transparency, and this thickness is preferably 20 ⁇ m to 100 ⁇ m from the viewpoint of touch pressure detection sensitivity.
  • a transparent piezoelectric sheet according to a third invention is the transparent piezoelectric sheet according to the first invention or the second invention,
  • the sheet-like transparent piezoelectric layer contains an organic polymer.
  • the transparent piezoelectric sheet according to the present invention can be manufactured by preparing a sheet-like transparent piezoelectric layer having a large area by containing the organic polymer in the sheet-like transparent piezoelectric layer, so that the manufacturing cost can be reduced. it can.
  • the transparent piezoelectric sheet of the fourth invention is the transparent piezoelectric sheet of the third invention,
  • the organic polymer is a vinylidene fluoride-tetrafluoroethylene copolymer.
  • the transparent piezoelectric sheet of the invention has particularly high transparency because the sheet-like transparent piezoelectric layer contains a vinylidene fluoride-tetrafluoroethylene copolymer.
  • the transparent piezoelectric sheet of the fifth invention is the transparent piezoelectric sheet of any of the first to fourth inventions,
  • the first transparent flat plate electrode further includes a first lead portion
  • the second transparent flat plate electrode further includes a second lead portion.
  • the first lead portion and the second lead portion are portions for connecting the first transparent flat plate electrode and the second transparent flat plate electrode to an external wiring, respectively.
  • the first transparent flat plate electrode further includes a first lead portion
  • the second transparent flat plate electrode further includes a second lead portion, so that it can be easily connected to an external wiring. Can connect.
  • the transparent piezoelectric sheet of the sixth invention is the transparent piezoelectric sheet of any of the first to fifth inventions, Furthermore, an adhesive part is included. Since the transparent piezoelectric sheet of the present invention has an adhesive portion, it can be used by being affixed to an arbitrary object such as a touch position detecting touch panel, and a function of detecting a touch pressure can be imparted to the surface thereof.
  • a transparent piezoelectric sheet according to a seventh aspect is the transparent piezoelectric sheet according to any one of the first to sixth aspects, Used in combination with a touch position detection touch panel.
  • the transparent piezoelectric sheet of the present invention can be used in combination with a touch position detection touch panel, thereby providing a touch position detection touch panel with a function of detecting a touch pressure.
  • the transparent piezoelectric sheet of the eighth invention is the transparent piezoelectric sheet of the seventh invention
  • the touch position detecting touch panel is a resistance film type or a capacitance type.
  • the transparent piezoelectric sheet of the present invention impairs the advantageous characteristic of the resistive touch panel for detecting touch position that the manufacturing cost is low or the advantageous characteristic of the capacitive touch panel for detecting touch position that multipoint detection is easy. Without this, the function of detecting the touch pressure can be given to them.
  • the transparent piezoelectric sheet with a frame of the ninth invention is The transparent piezoelectric sheet according to any one of the first to eighth inventions is accommodated in a frame,
  • the overlapping portion in plan view of the first transparent flat plate electrode and the second transparent flat plate electrode is a transparent piezoelectric sheet with a frame that does not overlap with the frame in plan view.
  • the transparent piezoelectric sheet with a frame according to the present invention has a frame and is easy to handle, and an overlapping portion in a plan view of the first transparent flat plate electrode and the second transparent flat plate electrode is formed in the frame in a plan view. By not overlapping, the touch pressure can be accurately detected.
  • the transparent piezoelectric sheet of the tenth invention is A sheet-like transparent piezoelectric layer; A first transparent flat plate electrode disposed on one surface of the sheet-like transparent piezoelectric layer; A second transparent flat plate electrode disposed on the other surface of the sheet-like transparent piezoelectric layer; A transparent piezoelectric sheet including an adhesive portion. Since the touch panel of the present invention includes the touch position detection touch panel and the transparent piezoelectric sheet, the touch position can be detected by the touch position detection touch panel, and the touch pressure can be detected by the transparent piezoelectric sheet. Furthermore, the transparent piezoelectric sheet of the present invention can be used by being attached to an arbitrary object such as a touch position detecting touch panel by having an adhesive portion, and can impart a function of detecting a touch pressure to the surface thereof. it can.
  • the transparent piezoelectric sheet of the eleventh invention is the transparent piezoelectric sheet of the tenth invention, Used in combination with a touch position detection touch panel.
  • the transparent piezoelectric sheet of the present invention can be used in combination with a touch position detection touch panel, thereby providing a touch position detection touch panel with a function of detecting a touch pressure.
  • a transparent piezoelectric sheet according to a twelfth invention is the transparent piezoelectric sheet according to the eleventh invention.
  • the touch position detecting touch panel is a resistance film type or a capacitance type.
  • the transparent piezoelectric sheet of the present invention impairs the advantageous characteristic of the resistive touch panel for detecting touch position that the manufacturing cost is low or the advantageous characteristic of the capacitive touch panel for detecting touch position that multipoint detection is easy. Without this, the function of detecting the touch pressure can be given to them.
  • a transparent piezoelectric sheet according to a thirteenth aspect of the present invention is the transparent piezoelectric sheet according to any one of the tenth to twelfth aspects of the present invention,
  • the sheet-like transparent piezoelectric layer has a thickness of 1 to 200 ⁇ m.
  • the transparent piezoelectric sheet according to the present invention has a high sensitivity and a high sensitivity without impairing the sensitivity and accuracy of touch position detection of the touch position detecting touch panel, because the thickness of the sheet-like transparent piezoelectric layer is 1 to 200 ⁇ m.
  • a function of detecting the touch pressure with accuracy can be provided.
  • This thickness is preferably 50 ⁇ m or less from the viewpoint of transparency, and this thickness is preferably 20 ⁇ m to 100 ⁇ m from the viewpoint of touch pressure detection sensitivity.
  • a transparent piezoelectric sheet according to a fourteenth aspect of the present invention is the transparent piezoelectric sheet according to any one of the tenth aspect to the thirteenth aspect of the present invention,
  • the sheet-like transparent piezoelectric layer contains an organic polymer.
  • the transparent piezoelectric sheet according to the present invention can be manufactured by preparing a sheet-like transparent piezoelectric layer having a large area by containing the organic polymer in the sheet-like transparent piezoelectric layer, so that the manufacturing cost can be reduced. it can.
  • a transparent piezoelectric sheet according to a fifteenth invention is the transparent piezoelectric sheet according to the fifteenth invention,
  • the organic polymer is a vinylidene fluoride-tetrafluoroethylene copolymer.
  • the transparent piezoelectric sheet of the invention has particularly high transparency because the sheet-like transparent piezoelectric layer contains a vinylidene fluoride-tetrafluoroethylene copolymer.
  • the transparent piezoelectric sheet of the sixteenth aspect of the invention is the transparent piezoelectric sheet of any one of the tenth to fifteenth aspects of the invention
  • the first transparent flat plate electrode has a first transparent flat plate electrode portion
  • the second transparent flat plate electrode has a second transparent flat plate electrode portion
  • the outline of the first transparent flat plate electrode part includes the outline of the second transparent flat plate electrode part in a plan view, or the outline of the second transparent flat plate electrode part is the first transparent flat plate electrode in a plan view. Includes the outline of the part.
  • the outline of the first transparent flat plate electrode part includes the outline of the second transparent flat plate electrode part in plan view, or the outline of the second transparent flat plate electrode part is flat.
  • the allowable range of deviation in plan view between the first transparent flat plate electrode portion and the second transparent flat plate electrode portion at the time of manufacture becomes large, and there is no problem at the time of manufacture.
  • the yield rate can be lowered.
  • the transparent piezoelectric sheet with a frame of the seventeenth invention is The transparent piezoelectric sheet of any one of the tenth to sixteenth inventions is housed in a frame,
  • the overlapping portion in plan view of the first transparent flat plate electrode and the second transparent flat plate electrode is a transparent piezoelectric sheet with a frame that does not overlap the frame in plan view.
  • the transparent piezoelectric sheet with a frame according to the present invention has a frame and is easy to handle, and an overlapping portion in a plan view of the first transparent flat plate electrode and the second transparent flat plate electrode is formed in the frame in a plan view. By not overlapping, the touch pressure can be accurately detected.
  • the transparent piezoelectric sheet with frame of the eighteenth invention is A transparent piezoelectric sheet; A frame containing the transparent piezoelectric sheet; Including an adhesive portion provided on the surface of the frame,
  • the transparent piezoelectric sheet is (1) a sheet-like transparent piezoelectric layer; (2) a first transparent flat plate electrode disposed on one surface of the sheet-like transparent piezoelectric layer; (3) a second transparent flat plate electrode disposed on the other surface of the sheet-like transparent piezoelectric layer; Have It is a transparent piezoelectric sheet with a frame.
  • the frame-equipped transparent piezoelectric sheet of the present invention can be used for detection of touch pressure.
  • the transparent piezoelectric sheet of the present invention is easy to handle by having a frame, and can be used by sticking to an arbitrary object such as a touch position detecting touch panel by having an adhesive portion. Can be provided with a function of detecting the touch pressure.
  • the transparent piezoelectric sheet with frame of the nineteenth invention is the transparent piezoelectric sheet with frame of the seventeenth invention or the eighteenth invention
  • the first transparent flat plate electrode further includes a first lead portion that connects the first transparent flat plate electrode portion to a wiring outside the frame
  • the second transparent flat plate electrode further includes a second lead portion that connects the second transparent flat plate electrode portion to a wiring outside the frame.
  • the first transparent flat plate electrode further includes a first lead portion connecting the first transparent flat plate electrode portion to an external wiring of the frame, and the second transparent flat plate electrode. Can be easily connected to external wiring by further including a second lead portion connecting the second transparent flat plate electrode portion to the external wiring of the frame.
  • a transparent piezoelectric sheet with a frame according to a twentieth invention is the transparent piezoelectric sheet with a frame according to any of the seventeenth to nineteenth inventions, Used in combination with a touch position detection touch panel.
  • the transparent piezoelectric sheet with a frame according to the present invention can be used in combination with a touch position detecting touch panel, thereby imparting a touch pressure detecting function to the touch position detecting touch panel.
  • the transparent piezoelectric sheet with frame of the twenty-first invention is the transparent piezoelectric sheet with frame of the twentieth invention
  • the touch position detecting touch panel is a resistance film type or a capacitance type.
  • the transparent piezoelectric sheet with a frame according to the present invention has an advantageous characteristic of a touch panel for detecting a touch position of a resistive film that manufacturing costs are low, or an advantageous characteristic of a touch panel for detecting a touch position of a capacitive type that multipoint detection is easy.
  • the function of detecting the touch pressure can be given to these without impairing the above.
  • the touch panel of the 22nd invention is A touch position detection touch panel;
  • 21 is a touch panel including any one of the transparent piezoelectric sheets with frames according to the invention. Since the touch panel of the present invention includes the transparent piezoelectric sheet or the transparent piezoelectric sheet with the frame, the touch position can be detected by the touch position detecting touch panel, and the transparent piezoelectric sheet (or the transparent piezoelectric sheet with the frame) is used. Touch pressure can be detected.
  • the form of the touch position detection touch panel is not limited, an arbitrary position detection method can be adopted.
  • the touch position detection touch panel an existing touch position detection touch panel can be used. Therefore, in the manufacture of the touch panel of the present invention, the touch position detection touch panel itself that has already been mass-produced, and its touch panel Manufacturing equipment is available.
  • a touch panel according to a twenty-third invention is the touch panel according to the twenty-second invention,
  • the touch position detecting touch panel is a resistance film type or a capacitance type.
  • the transparent piezoelectric sheet of the present invention impairs the advantageous characteristic of the resistive touch panel for detecting touch position that the manufacturing cost is low or the advantageous characteristic of the capacitive touch panel for detecting touch position that multipoint detection is easy. Without having.
  • the touch panel of the 24th invention is the touch panel according to the 22nd invention or the 23rd invention, Further, an elastic sheet is included.
  • the touch panel of the present invention can detect touch pressure with higher sensitivity by further including an elastic sheet.
  • the touch position detecting touch panel according to the 25th aspect of the present invention is A touch position detecting touch panel, wherein the transparent piezoelectric sheet according to the sixth or tenth invention or the transparent piezoelectric sheet with a frame according to the eighteenth invention is attached by the adhesive portion.
  • the touch position detecting touch panel is provided with a function of detecting a touch pressure by attaching the transparent piezoelectric sheet or the frame-attached transparent piezoelectric sheet.
  • the display device of the twenty-sixth aspect of the invention is A transparent piezoelectric sheet according to the sixth or tenth invention or a transparent piezoelectric sheet with a frame according to the eighteenth invention is a display device to which the adhesive portion is attached.
  • the display device has a function of detecting a touch pressure by attaching the transparent piezoelectric sheet or the transparent piezoelectric sheet with a frame.
  • the touch panel of the 27th invention is A touch position detection touch panel; A transparent piezoelectric sheet disposed on one surface of the touch position detection touch panel, The transparent piezoelectric sheet is (1) a sheet-like transparent piezoelectric layer; (2) a first transparent flat plate electrode disposed on one surface of the sheet-like transparent piezoelectric layer; (3) A touch panel having a second transparent flat plate electrode disposed on the other surface of the sheet-like transparent piezoelectric layer. Since the touch panel of the present invention includes the touch position detection touch panel and the transparent piezoelectric sheet, the touch position can be detected by the touch position detection touch panel, and the touch pressure can be detected by the transparent piezoelectric sheet. Since the form of the touch position detection touch panel is not limited, an arbitrary position detection method can be adopted. As the touch position detection touch panel, an existing touch position detection touch panel can be used. Therefore, in the manufacture of the touch panel of the present invention, the touch position detection touch panel itself that has already been mass-produced, and its touch panel Manufacturing equipment is available.
  • a touch panel according to a twenty-eighth aspect is the touch panel according to the twenty-seventh aspect
  • the sheet-like transparent piezoelectric layer has a thickness of 1 to 200 ⁇ m. Since the touch panel of the present invention has a thickness of 1 to 200 ⁇ m, it can detect the touch position and the touch pressure with high sensitivity and high accuracy. This thickness is preferably 50 ⁇ m or less from the viewpoint of transparency, and this thickness is preferably 20 ⁇ m to 100 ⁇ m from the viewpoint of touch pressure detection sensitivity.
  • a touch panel according to a twenty-ninth invention is the touch panel according to the twenty-seventh invention or the twenty-eighth invention.
  • the sheet-like transparent piezoelectric layer contains an organic polymer. Since the sheet-like transparent piezoelectric layer contains an organic polymer, the touch panel of the present invention can be prepared by preparing a large-area sheet-like transparent piezoelectric layer, and thus the manufacturing cost can be reduced.
  • a touch panel according to a thirtieth invention is the touch panel according to the twenty-ninth invention,
  • the organic polymer is a vinylidene fluoride-tetrafluoroethylene copolymer.
  • the touch panel of the present invention has particularly high transparency because the sheet-like transparent piezoelectric layer contains a vinylidene fluoride-tetrafluoroethylene copolymer.
  • a touch panel according to a thirty-first invention is the touch panel according to any of the twenty-seventh to thirtieth inventions,
  • the transparent piezoelectric sheet is accommodated in a frame,
  • An overlapping portion in plan view of the first transparent flat plate electrode and the second transparent flat plate electrode does not overlap with the frame in plan view.
  • the overlapping portion in the plan view of the first transparent flat plate electrode and the second transparent flat plate electrode does not overlap with the frame in the plan view, so that the touch pressure can be accurately detected. it can.
  • a touch panel according to a thirty-second invention is the touch panel according to the thirty-first invention
  • the first transparent flat plate electrode includes a first transparent flat plate electrode portion and a first lead portion that connects the first transparent flat plate electrode portion to a wiring outside the frame
  • the second transparent flat plate electrode has a second transparent flat plate electrode portion and a second lead portion that connects the second transparent flat plate electrode portion to a wiring outside the frame
  • the outline of the first transparent flat plate electrode part includes the outline of the second transparent flat plate electrode part in a plan view, or the outline of the second transparent flat plate electrode part is the first transparent flat plate electrode in a plan view. Includes the outline of the part.
  • the outline of the first transparent flat plate electrode part includes the outline of the second transparent flat plate electrode part in a plan view, or the outline of the second transparent flat plate electrode part is in a plan view.
  • a touch panel according to a thirty-third invention is the touch panel according to any of the twenty-seventh to thirty-second inventions, Of the first transparent flat plate electrode and the second transparent flat plate electrode, the touch side electrode is a ground electrode.
  • the touch-side electrode of the first transparent flat plate electrode and the second transparent flat plate electrode is a ground electrode, so that noise of the output voltage can be reduced.
  • a touch panel according to a thirty-fourth aspect is the touch panel according to thirty-third aspect,
  • the transparent piezoelectric sheet is disposed in contact with a surface opposite to the touch side of the touch position detection touch panel, and the transparent flat electrode on the touch side also serves as a ground electrode of the touch position detection touch panel.
  • the transparent flat plate electrode on the touch side also serves as the ground electrode of the touch position detecting touch panel, thereby simplifying the structure of the touch panel according to the present invention and thereby reducing the manufacturing cost.
  • the touch panel of the 35th invention is A touch position detection touch panel; A transparent piezoelectric sheet disposed on one surface of the touch position detection touch panel, The transparent piezoelectric sheet is (1) a first transparent sheet member in which a first transparent flat plate electrode is formed on the lower surface; (2) a sheet-like transparent piezoelectric layer; (3) a second transparent sheet member having a second transparent flat plate electrode formed on the upper surface; The first transparent sheet member, the sheet-like transparent piezoelectric layer, and the second transparent sheet member are touch panels that are laminated in this order. Since the touch panel of the present invention has the same effect as the touch panel of the first invention, a general-purpose member (eg, PET film with ITO) can be used as a transparent sheet member on which a flat plate electrode is formed. Easy to manufacture.
  • a general-purpose member eg, PET film with ITO
  • a touch panel according to a thirty-sixth aspect is the touch panel according to any of the twenty-seventh to thirty-fifth aspects,
  • the sheet-like transparent piezoelectric layer contains an organic polymer. Since the sheet-like transparent piezoelectric layer contains an organic polymer, the touch panel of the present invention can be prepared by preparing a large-area sheet-like transparent piezoelectric layer, and thus the manufacturing cost can be reduced.
  • a touch panel according to a thirty-seventh aspect is the touch panel according to the thirty-sixth aspect,
  • the organic polymer is a vinylidene fluoride-tetrafluoroethylene copolymer.
  • the transparent piezoelectric sheet of the invention has particularly high transparency because the sheet-like transparent piezoelectric layer contains a vinylidene fluoride-tetrafluoroethylene copolymer.
  • a touch panel according to a thirty-eighth aspect is the touch panel according to any one of the twenty-seventh to thirty-seventh aspects, Further, an elastic sheet is included.
  • the touch panel of the present invention can detect touch pressure with higher sensitivity by further including an elastic sheet.
  • the touch panel of the present invention includes a touch position detection touch panel and a transparent piezoelectric sheet
  • the touch position can be detected with high accuracy by the touch position detection touch panel, and the touch pressure can be detected by the transparent piezoelectric sheet.
  • the form of the touch position detection touch panel is not limited, an arbitrary position detection method can be adopted.
  • the touch position detection touch panel an existing touch position detection touch panel can be used. Therefore, in manufacturing the touch panel of the present invention, the touch position detection touch panel itself already mass-produced, and its touch panel Manufacturing equipment is available.
  • the transparent piezoelectric sheet of the present invention can be used for detection of touch pressure.
  • the outline of the first transparent flat plate electrode part includes the outline of the second transparent flat plate electrode part in plan view, or the outline of the second transparent flat plate electrode part is A region where both the touch pressure and the touch position can be detected when used in combination with the touch position detection touch panel when including the outline of the first transparent flat plate electrode portion in plan view, and the touch position detection touch panel
  • the touch position detection area can be matched to a high degree, and can be suitably used in combination with a touch position detection touch panel.
  • the transparent piezoelectric sheet of the present invention when it has an adhesive portion, it can be used by being affixed to an arbitrary object such as a touch position detecting touch panel, and a function for detecting the touch pressure is provided on the surface thereof. can do.
  • mode of the touchscreen of this invention Sectional drawing of the one aspect
  • (Test Example 2) Graph showing an electric signal caused by the touch of the pressure 12 kN / m 2.
  • FIG. 1 is a diagram showing one embodiment (touch panel 100) of the touch panel of the present invention.
  • the touch panel 100 includes a touch position detection touch panel 10.
  • the touch position detection touch panel 10 is not particularly limited, and a general-purpose touch position detection touch panel can be used.
  • Examples of the touch position detection touch panel 10 include a resistive film type, a capacitance type, an ultrasonic type, and an optical type, but are not limited thereto. Among these, (a) a resistive touch panel for touch position detection that is low in manufacturing cost or (b) a capacitive touch panel for touch position detection that facilitates multi-point detection is preferable.
  • the advantage of the touch position detecting touch panel of the above method can be maintained as it is.
  • the thickness of the touch position detecting touch panel 10 is preferably 100 ⁇ m to 2 mm. If the touch position detecting touch panel 10 is too thick, the transparency of the touch panel of the present invention may be lowered. In particular, when the touch position detection touch panel 10 is arranged on the touch side with respect to the transparent piezoelectric sheet 20, if the touch position detection touch panel 10 is too thick, the touch pressure detection by the transparent piezoelectric sheet 20 is detected. There is a risk that the sensitivity of.
  • the transparent piezoelectric sheet 20 is disposed on one surface of the touch position detection touch panel 10. The transparent piezoelectric sheet 20 may be on the touch side with respect to the touch position detection touch panel 10, and may be on the opposite side of the touch side.
  • the transparent piezoelectric sheet 20 is (1) a sheet-like transparent piezoelectric layer 21; (2) a first transparent flat plate electrode 22 disposed on one surface of the sheet-like transparent piezoelectric layer 21; (3) It has the 2nd transparent flat plate electrode 23 arrange
  • the sheet-like transparent piezoelectric layer 21 is not particularly limited as long as it has piezoelectricity and transparency, but is a layer containing vinylidene fluoride-tetrafluoroethylene copolymer, vinylidene fluoride-ethylene trifluoride.
  • Examples include a layer containing a copolymer and a layer containing polyvinylidene fluoride. Among these, a layer made of a vinylidene fluoride-tetrafluoroethylene copolymer is preferable.
  • the vinylidene fluoride: tetrafluoroethylene (molar ratio) in the vinylidene fluoride-tetrafluoroethylene copolymer is preferably 50:50 to 90:10 from the viewpoint of piezoelectricity related to the detection sensitivity of the touch pressure. 65:35 to 80:20 are more preferable.
  • the layer containing a vinylidene fluoride-tetrafluoroethylene copolymer, the layer containing a vinylidene fluoride-ethylene trifluoride copolymer, and the layer containing a polyvinylidene fluoride are stretched from the viewpoint of improving piezoelectricity. It may be processed. Here, the stretching is preferably 3 to 10 times in the uniaxial direction. The stretching process may be performed by a conventional method.
  • Processing In order to impart piezoelectricity to a layer containing a vinylidene fluoride-tetrafluoroethylene copolymer, a layer containing a vinylidene fluoride-ethylene trifluoride copolymer, and a layer containing a polyvinylidene fluoride, Processing (also referred to as polling processing) may be performed.
  • the polarization treatment can be performed by a corona discharge treatment or a conventional method.
  • the film is sandwiched from both sides with a metal electrode or the like, and a DC electric field of 30 to 400 MV / m is applied for 0.1 seconds to 60 minutes.
  • the sheet-like transparent piezoelectric layer 21 may contain an additive added to the resin film as long as the piezoelectricity and transparency are not impaired.
  • the thickness of the sheet-like transparent piezoelectric layer 21 is usually 1 to 200 ⁇ m, preferably 50 ⁇ m or less from the viewpoint of transparency, and preferably 20 ⁇ m to 100 ⁇ m from the viewpoint of touch pressure detection sensitivity.
  • the sheet-like transparent piezoelectric layer 21 may be a single layer or a plurality of layers.
  • the transparent piezoelectric sheet 20 is preferably accommodated in the frame 24 from the viewpoint of ease of handling. As shown in FIG. 2, the entire touch panel including the transparent piezoelectric sheet 20 and the touch position detection panel 10 may be accommodated in the frame 24.
  • the first transparent flat plate electrode 22 and the second transparent flat plate electrode 23 only need to have transparency, for example, an inorganic electrode such as ITO (indium tin oxide) and tin oxide, and a thiophene-based conductive polymer, An electrode selected from conductive polymers such as polyaniline and polypyrrole can be used.
  • the first transparent flat plate electrode 22 and the second transparent flat plate electrode 23 are formed on the surface of the sheet-like transparent piezoelectric layer 21 by sputtering or vapor deposition, respectively. Can be placed on the surface.
  • a first transparent sheet member 32 may be disposed on the surface of the first transparent flat plate electrode 22 opposite to the sheet-like transparent piezoelectric layer 21.
  • a second transparent sheet member 33 may be disposed on the surface of the second transparent flat plate electrode 22 opposite to the sheet-like transparent piezoelectric layer 21 if desired.
  • the first transparent flat plate electrode 22 can be formed on one surface of the first transparent sheet member 32 by a sputtering method, a vapor deposition method, or the like.
  • the first transparent flat plate electrode 22 may be bonded to one surface of the first transparent sheet member 33 by an adhesive (eg, epoxy adhesive).
  • the sheet-like transparent piezoelectric layer 21 is formed on the surface of the first transparent sheet member 33 on the first transparent flat plate electrode 22 side (on the surface of the first transparent flat plate electrode 22 opposite to the first transparent sheet member 33).
  • a first transparent sheet member 32 is disposed on the surface of the first transparent flat plate electrode 22 opposite to the sheet-shaped transparent piezoelectric layer 21, and the sheet-shaped transparent piezoelectric layer 21 of the second transparent flat plate electrode 22 is disposed.
  • the second transparent sheet member 33 is disposed on the surface opposite to the touch panel 100a of the present invention, as shown in FIG.
  • the transparent piezoelectric sheet 20a includes (1) a first transparent sheet member 32 having a first transparent flat plate electrode 22 formed on the lower surface; (2) a sheet-like transparent piezoelectric layer 21; (3) a second transparent sheet member 33 having a second transparent flat plate electrode 23 formed on the upper surface, and the first transparent sheet member 32, the sheet-like transparent piezoelectric layer 21, and the second transparent sheet
  • the sheet member 33 is laminated in this order.
  • the 1st transparent sheet member 32 and the 2nd transparent sheet member 33 although a polyethylene terephthalate film can be used, for example, it is transparent and can form the 1st transparent plate electrode 22 and the 1st transparent plate electrode 23.
  • the thicknesses of the first transparent sheet member 32 and the second transparent sheet member 33 are preferably 1 ⁇ m to 200 ⁇ m. If this thickness is too large, the transparency may be lowered and the detection sensitivity of the touch pressure may be lowered.
  • the transparent piezoelectric sheet 20a is preferably accommodated in the frame 24 from the viewpoint of ease of handling. As shown in FIG. 2, the entire touch panel including the transparent piezoelectric sheet 20 a and the touch position detection panel 10 may be accommodated in the frame 24. Although not shown, a liquid crystal display panel may be housed together with the transparent piezoelectric sheet 20.
  • the overlapping portion in the plan view of the first transparent flat plate electrode 22 and the second transparent flat plate electrode 23 is the frame 24 in the plan view. Does not overlap.
  • the first transparent flat plate electrode 22 includes a first transparent flat plate electrode portion 221 and a first lead portion 222 that connects the first transparent flat plate electrode portion 221 to a wiring outside the frame
  • the second transparent flat plate electrode 23 includes a second transparent flat plate electrode portion 231 and a second lead portion 232 that connects the second transparent flat plate electrode portion 231 to a wiring outside the frame.
  • the outline of the first transparent flat plate electrode part 231 includes the outline of the second transparent flat plate electrode part in plan view, or as shown in FIG.
  • the outline includes the outline of the first transparent flat plate electrode portion 221 in plan view.
  • Each of the first transparent flat plate electrode portion 221 and the second transparent flat plate electrode portion 231 may cover the entire main surface of the sheet-like transparent piezoelectric layer 21 (not shown in FIG. 3), or covers a part thereof.
  • the flat plate electrode portion of one flat plate electrode covers the entire main surface of the sheet-like transparent piezoelectric layer 21
  • the flat plate electrode portion of the other flat plate electrode is inevitably formed into a sheet shape. Only the main surface portion of the transparent piezoelectric layer 21 is covered.
  • the outline of the first transparent flat plate electrode portion 221 and the outline of the second transparent flat plate electrode portion 231 do not exist outside the outline of the main surface of the sheet-like transparent piezoelectric layer 21, respectively. Since the portion where the first transparent flat plate electrode portion 221 and the second transparent flat plate electrode portion 231 overlap in plan view is a portion where the pressing position can be detected, the overlap with respect to the area of the main surface of the sheet-like transparent piezoelectric layer 21
  • the area ratio of the portions to be performed is preferably 70% or more, more preferably 80% or more.
  • the area of the first transparent flat plate electrode part 221 and the area of the second transparent flat plate electrode part 231 with respect to the area of the main surface of the sheet-like transparent piezoelectric layer 21 are preferably 80% or more, more preferably 90%. That's it.
  • an allowable range of deviation in plan view between the first transparent flat plate electrode portion 221 and the second transparent flat plate electrode portion 231 at the time of manufacturing is increased, and the defective product rate at the time of manufacturing is reduced. Can do.
  • the first transparent flat plate electrode portion 221 and the second transparent flat plate electrode portion 231 with respect to the area of the main surface of the sheet-like transparent piezoelectric layer 21 overlap with the main surface of the sheet-like transparent piezoelectric layer 21 in plan view.
  • the ratio of the smaller area among the areas of the portions is preferably 70% or more, more preferably 80% or more. Thereby, a touch pressure can be detected in a wide area.
  • the first transparent flat plate electrode portion 221 and the first lead portion 222, and the second transparent flat plate electrode portion 231 and the second lead portion 232 may be integrally formed as shown in FIG. Separately formed ones may be connected. Moreover, the 1st lead part 222 and the 2nd lead part 232 may each protrude from the said sheet-like transparent piezoelectric material layer 21, as shown in FIG.
  • the touch side electrode of the first transparent flat plate electrode 22 and the second transparent flat plate electrode 23 is a ground electrode. Thereby, noise of the output voltage can be reduced.
  • the touch position detection touch panel 10 is a resistive film type or a capacitance type
  • the touch-side transparent flat plate electrode serves as a ground electrode of the touch position detection touch panel 10. I can also serve. (Not shown)
  • the touch position detection touch panel 10 itself is independent and does not function as a touch position detection panel. Thereby, the structure of the touch panel of this invention can be simplified and manufacturing cost can be lowered
  • the touch position detecting touch panel 10 further includes an elastic sheet (not shown) as desired. This makes it possible to detect the touch pressure with higher sensitivity.
  • the elastic sheet is preferably disposed between the piezoelectric sheet and the liquid crystal display. From the viewpoint of obtaining the above effect, the thickness of the elastic sheet is preferably 10 ⁇ m to 2 mm.
  • FIG. 5 is a view showing an embodiment (transparent piezoelectric sheet 200) of the transparent piezoelectric sheet of the present invention.
  • the transparent piezoelectric sheet 200 is A sheet-like transparent piezoelectric layer 21; A first transparent flat plate electrode 22 disposed on one surface of the sheet-like transparent piezoelectric layer; A second transparent flat plate electrode 23 disposed on the other surface of the sheet-like transparent piezoelectric layer; And the adhesive portion 5.
  • symbol in one embodiment (touch panel 100) of the touch panel of this invention is the same as the member in the touch panel 100, The description is abbreviate
  • the adhesive portion 5 can exist in any size, number, and shape on the surface of the sheet-like transparent piezoelectric layer 21, the first transparent flat plate electrode 22, and the second transparent flat plate electrode 23.
  • the thickness of the adhesive portion 5 is preferably 200 ⁇ m or less (eg, 2 to 200 ⁇ m). If this thickness is too large, the transparency may decrease.
  • the adhesive part 5 is preferably transparent.
  • the transparent piezoelectric sheet 200 can be affixed to the surface of an article such as a touch position detection touch panel and a display device by the adhesive portion 5, and a touch pressure detection function can be imparted to the article.
  • the transparent piezoelectric sheet 200 is preferably used in combination with a touch position detecting touch panel.
  • the touch position detection touch panel is preferably a resistive film type or a capacitance type.
  • ⁇ Transparent Piezoelectric Sheet (Embodiment 2)> Of the transparent piezoelectric sheet 20 used for the touch panel 100 described above, A sheet-like transparent piezoelectric layer; A first transparent flat plate electrode 22 disposed on one surface of the sheet-like transparent piezoelectric layer; A second transparent flat plate electrode 23 disposed on the other surface of the sheet-like transparent piezoelectric layer; Including The first transparent plate electrode 22 has a first transparent plate electrode portion 221; The second transparent plate electrode 23 has a second transparent plate electrode portion 231, The outline of the first transparent flat plate electrode portion 221 includes the outline of the second transparent flat plate electrode portion 231 in plan view, or the outline of the second transparent flat plate electrode portion 231 is the first view in plan view.
  • a transparent piezoelectric sheet including the outline of the transparent flat electrode portion 221 is also an embodiment of the present invention.
  • symbol in one embodiment (touch panel 100) of the touch panel of this invention is the same as the member in the touch panel 100, The description is abbreviate
  • the transparent piezoelectric sheet 20 of this aspect can detect touch pressure with high accuracy. Further, the accuracy of the transparent piezoelectric sheet 20 according to this aspect is not easily affected by the strength of the constituent members of the touch panel and the transparent piezoelectric sheet 20.
  • FIG. 6 is a view showing an embodiment (transparent piezoelectric sheet with frame 200a) of the transparent piezoelectric sheet with frame of the present invention.
  • the transparent piezoelectric sheet with frame 200a is A transparent piezoelectric sheet 2; A frame 24 containing the transparent piezoelectric sheet; An adhesive portion 5a provided on the surface of the frame 24a,
  • the transparent piezoelectric sheet 2 is (1) a sheet-like transparent piezoelectric layer 21; (2) a first transparent flat plate electrode 22 disposed on one surface of the sheet-like transparent piezoelectric layer; (3) a second transparent flat plate electrode 23 disposed on the other surface of the sheet-like transparent piezoelectric layer; Have.
  • symbol in one embodiment (touch panel 100) of the touch panel of this invention is the same as the member in the touch panel 100, The description is abbreviate
  • the adhesive portions 5a can exist in any size, number and shape on the surface of the frame 24a.
  • the thickness of the adhesive portion 5a is preferably 200 ⁇ m or less (eg, 2 to 200 ⁇ m). If this thickness is too large, the transparency may decrease.
  • the transparent piezoelectric sheet with frame 200a can be attached to the surface of an article such as a touch position detecting touch panel and a display device by the adhesive portion 5a, and a touch pressure detecting function can be imparted to the article.
  • the adhesive portion 5a may be provided on the entire surface of the frame 24a or on a part as shown in FIG.
  • the transparent piezoelectric sheet with frame 200a is preferably used in combination with a touch position detecting touch panel.
  • the touch position detection touch panel is preferably a resistive film type or a capacitance type.
  • a touch position detecting touch panel or a display device to which the transparent piezoelectric sheet of the present invention or the transparent piezoelectric sheet with a frame of the present invention is attached is also an embodiment of the present invention.
  • the touch position detecting touch panel to which the transparent piezoelectric sheet of the present invention or the transparent piezoelectric sheet with a frame of the present invention is attached is an embodiment of the touch panel of the present invention. These are provided with a function of detecting a touch pressure.
  • Membranes having a film thickness of 20 ⁇ m (Example 1) and 50 ⁇ m (Example 2) were obtained by casting a methyl ethyl ketone solution of vinylidene fluoride-tetrafluoroethylene copolymer (molar ratio 80:20) onto a PET substrate. The solvent was vaporized at 150 ° C. to mold. Films having a thickness of 80 ⁇ m (Example 3) and 100 ⁇ m (Example 4) were prepared by using a pellet-like melt composed of a vinylidene fluoride-tetrafluoroethylene copolymer (molar ratio 80:20) and a T-die. It shape
  • Membranes having a film thickness of 30 ⁇ m (Comparative Example 1) and 50 ⁇ m (Comparative Example 2) were obtained by casting a methyl ethyl ketone solution of vinylidene fluoride-trifluoride ethylene copolymer (molar ratio 75:25) onto a PET substrate. The solvent was vaporized at 150 ° C. to mold. Films with a film thickness of 80 ⁇ m (Comparative Example 3) and 100 ⁇ m (Comparative Example 4) were prepared by using a pellet-like melt made of vinylidene fluoride-ethylene trifluoride copolymer (molar ratio 75:25) as a T-die. It shape
  • the total light transmittance of the vinylidene fluoride-tetrafluoroethylene copolymer film having a thickness of 100 ⁇ m was 95%, and the HAZE value was 7.
  • This film was sandwiched between two glass plates, heat-treated at 150 ° C. for 10 minutes, and then rapidly cooled to room temperature.
  • the film thickness after the treatment was 100 ⁇ m, the total light transmittance was 94%, and the HAZE value was 8.
  • the total light transmittance and HAZE value of the vinylidene fluoride-ethylene trifluoride copolymer film (molar ratio 75:25) are 94% and 14, when the film thickness is 30 ⁇ m (Comparative Example 1), and the film thickness is 50 ⁇ m (comparison).
  • Example 2 95% and 18 and in the case of a film thickness of 80 ⁇ m (Comparative Example 3), they were 95% and 27, respectively.
  • This film was sandwiched between two glass plates, heat-treated at 150 ° C. for 10 minutes, and then rapidly cooled to room temperature. The film thickness after the treatment was 100 ⁇ m, the total light transmittance was 93%, and the HAZE value was 88.
  • Table 1 The results are shown in Table 1.
  • the vinylidene fluoride-tetrafluoroethylene copolymer film and the vinylidene fluoride-trifluoride ethylene copolymer film are both light transmissive within the range of the film thickness tested. Is high and has the same light transmittance, However, with regard to turbidity (transparency), the vinylidene fluoride-trifluoride ethylene copolymer film decreases in transparency as the film thickness increases, whereas the vinylidene fluoride-tetrafluoroethylene copolymer weight decreases. The combined film showed high transparency within the range of film thickness tested.
  • the change in the HAZE value when the vinylidene fluoride-tetrafluoroethylene copolymer film was rapidly cooled after the heat treatment was small.
  • Example 2 Using the film of Example 2 shown in Table 1, ITO was formed on both sides of a transparent piezoelectric sheet having a thickness of 50 ⁇ m by sputtering. The sheet resistance of the electrode is 10 ⁇ / Sq. Met.
  • the transparent piezoelectric sheet was subjected to a poling process using a ferroelectric test system RT6000HVS manufactured by Radiant Technology. Polling in which the above electrode is formed between a resistive touch panel layer (thickness 1 mm) and a liquid crystal panel layer constituting a liquid crystal display part of a pocket gear MC / PG5000 (trade name) manufactured by NEC Corporation A touch panel was formed by sandwiching the processed transparent piezoelectric sheet.
  • Example 3 Using the polled film of Example 2 in Table 1, both sides of a transparent piezoelectric sheet having a thickness of 50 ⁇ m were sandwiched between ITO-deposited PET films. The transparent piezoelectric sheet was laminated on the resistive touch panel of the liquid crystal display part of Zaurus SL-C760 (trade name) manufactured by Sharp Corporation to form a touch panel. As a result of applying pressure with the touch pen, the magnitude of the voltage signal to be output changed depending on the pressing pressure, and the same result as in Test Example 2 could be obtained.
  • Test Example 5 Vacuum heating deposition (HUS-5, manufactured by Hitachi, Ltd.) was performed on both surfaces of the poling treatment of the 25 ⁇ m-thick vinylidene fluoride-tetrafluoroethylene copolymer film (molar ratio 80:20) obtained in Test Example 4. ) To deposit an aluminum electrode (hereinafter referred to as a double-sided vapor-deposited film). Next, the double-sided vapor-deposited film was cut into a circle having a diameter of 11 mm using a punching punch.
  • the electromechanical coupling coefficient kt was calculated by the method. The calculation is based on K.K. Koga, H .; Ohashi, J. et al. Appl. Phys. 59, 2142 (1986)). As a result, the electromechanical coupling coefficient kt was 0.07.

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Abstract

L’invention concerne un panneau tactile ou similaire qui (1) présente une grande transparence, (2) peut adopter divers procédés de détection de position, et (3) peut utiliser un appareil existant pour fabriquer un panneau tactile pour détecter une position de contact ou utiliser un panneau tactile existant pour détecter une position de contact lui-même dans le processus de fabrication de celui-ci. Afin de réaliser le panneau tactile ci-dessus, une feuille piézoélectrique transparente comprend une couche piézoélectrique transparente similaire à une feuille, une première électrode plaque transparente prévue sur une surface de la couche piézoélectrique transparente similaire à une feuille, et une seconde électrode plaque transparente prévue sur l'autre surface de la couche piézoélectrique transparente similaire à une feuille. Dans la feuille piézoélectrique transparente, la première électrode plaque transparente comporte une première partie d'électrode plaque transparente, et la seconde électrode plaque transparente comporte une seconde partie d'électrode plaque transparente. Dans la feuille piézoélectrique transparente, le contour de la première partie d'électrode plaque transparente entoure le contour de la seconde partie d'électrode plaque transparente en vue plane, ou le contour de la seconde partie d'électrode plaque transparente entoure le contour de la première partie d'électrode plaque transparente en vue plane.
PCT/JP2009/005074 2008-10-03 2009-10-01 Panneau tactile et feuille piézoélectrique transparente WO2010038466A1 (fr)

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