Transparent piezoelectric sheet, and transparent piezoelectric sheet-with-a-frame, touch panel, and electronic device each having the transparent piezoelectric sheet
First Claim
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1. A transparent piezoelectric sheet comprising:
- a quadrilateral-shaped transparent piezoelectric film including an organic polymer, the quadrilateral-shaped transparent piezoelectric film having four sides and entire main surfaces that are piezoelectric;
a first transparent plate electrode layered on part of a first main surface, which is one side surface of the main surfaces of the transparent piezoelectric film; and
a second transparent plate electrode layered on part of a second main surface, which is an opposite side surface from the first main surfaces of the transparent piezoelectric film,the transparent piezoelectric film has a non-covered portion, which is a part of the first main surface, not covered by the first transparent plate electrode,the non-covered portion is one ofa first part one side of the four sides of the quadrilateral shape the transparent piezoelectric film and the neighborhood thereof,a second part including two sides of the four sides of the quadrilateral shape of the transparent a piezoelectric film and the neighborhoods thereof anda third part including three sides of the four sides of the quadrilateral shape of the transparent piezoelectric film and the neighborhood thereof,at least a part of the second transparent plate electrode being overlapped with at least a part of the non-covered portion as seen in a an view,as seen in the plan view, an overlap region being equal to or greater than 70% of an area of the main surfaces of the transparent piezoelectric film, the overlap region which is an area of a region of overlap between the first transparent plate electrode and the second transparent plate electrode, andthe transparent piezoelectric sheet being used in a state thatat least a part of the non-covered portion is overlapped with at least a part of an edge portion of a frame in a thickness direction, and the frame holds all of the four sides of the transparent piezoelectric film in a thickness direction, orat least a part of the non-covered portion is overlapped with at least a part of an edge portion of a casing in a thickness direction, and the casing holds one side, two sides or three sides of the four sides of the transparent piezoelectric film in a thickness direction.
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Abstract
A transparent piezoelectric sheet includes a quadrilateral-shaped transparent piezoelectric film and a first transparent plate electrode. The quadrilateral-shaped transparent piezoelectric film includes an organic polymer. The quadrilateral-shaped transparent piezoelectric film has entire main surfaces that are piezoelectric. The first transparent plate electrode is layered on part of a first main surface of the main surfaces of the transparent piezoelectric film. One to three sides of the four sides of the quadrilateral shape of the transparent piezoelectric film and area(s) of the first main surface adjacent thereto are not covered by the first transparent plate electrode.
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Citations
17 Claims
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1. A transparent piezoelectric sheet comprising:
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a quadrilateral-shaped transparent piezoelectric film including an organic polymer, the quadrilateral-shaped transparent piezoelectric film having four sides and entire main surfaces that are piezoelectric; a first transparent plate electrode layered on part of a first main surface, which is one side surface of the main surfaces of the transparent piezoelectric film; and a second transparent plate electrode layered on part of a second main surface, which is an opposite side surface from the first main surfaces of the transparent piezoelectric film, the transparent piezoelectric film has a non-covered portion, which is a part of the first main surface, not covered by the first transparent plate electrode, the non-covered portion is one of a first part one side of the four sides of the quadrilateral shape the transparent piezoelectric film and the neighborhood thereof, a second part including two sides of the four sides of the quadrilateral shape of the transparent a piezoelectric film and the neighborhoods thereof and a third part including three sides of the four sides of the quadrilateral shape of the transparent piezoelectric film and the neighborhood thereof, at least a part of the second transparent plate electrode being overlapped with at least a part of the non-covered portion as seen in a an view, as seen in the plan view, an overlap region being equal to or greater than 70% of an area of the main surfaces of the transparent piezoelectric film, the overlap region which is an area of a region of overlap between the first transparent plate electrode and the second transparent plate electrode, and the transparent piezoelectric sheet being used in a state that at least a part of the non-covered portion is overlapped with at least a part of an edge portion of a frame in a thickness direction, and the frame holds all of the four sides of the transparent piezoelectric film in a thickness direction, or at least a part of the non-covered portion is overlapped with at least a part of an edge portion of a casing in a thickness direction, and the casing holds one side, two sides or three sides of the four sides of the transparent piezoelectric film in a thickness direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification
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Current AssigneeDaikin Industries Ltd, Ideal Star Inc.
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Original AssigneeDaikin Industries Ltd, Ideal Star Inc.
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InventorsKodani, Tetsuhiro, Mukai, Eri, Kanemura, Takashi, Koh, Meiten, Omote, Kenji, Kuwajima, Yuuki, Ohigashi, Hiroji
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Primary Examiner(s)DOUGHERTY, THOMAS M
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Application NumberUS13/639,830Publication NumberTime in Patent Office1,653 DaysField of Search310/324, 310363-366, 737/15, 737/21, 737/23, 345/173US Class Current1/1CPC Class CodesG06F 2203/04105 Pressure sensors for measur...G06F 3/041 Digitisers, e.g. for touch ...H10N 30/302 SensorsH10N 30/857 Macromolecular compositionsH10N 30/878 the principal material bein...
