The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 18, 2012
Filed:
Oct. 15, 2009
Kazutoshi Watanabe, Fukushima-ken, JP;
Hideaki Nagakubo, Fukushima-ken, JP;
Takenobu Kimura, Fukushima-ken, JP;
Koichi Yamamoto, Fukushima-ken, JP;
Katsuyuki Katayama, Fukushima-ken, JP;
Naomi Sato, Fukushima-ken, JP;
Naoya Akiyama, Fukushima-ken, JP;
Shinichiro Kimura, Fukushima-ken, JP;
Masahiro Ishida, Fukushima-ken, JP;
Naoki Yamada, Fukushima-ken, JP;
Keiji Takagi, Fukushima-ken, JP;
Toshinobu Hosaka, Fukushima-ken, JP;
Kazutoshi Watanabe, Fukushima-ken, JP;
Hideaki Nagakubo, Fukushima-ken, JP;
Takenobu Kimura, Fukushima-ken, JP;
Koichi Yamamoto, Fukushima-ken, JP;
Katsuyuki Katayama, Fukushima-ken, JP;
Naomi Sato, Fukushima-ken, JP;
Naoya Akiyama, Fukushima-ken, JP;
Shinichiro Kimura, Fukushima-ken, JP;
Masahiro Ishida, Fukushima-ken, JP;
Naoki Yamada, Fukushima-ken, JP;
Keiji Takagi, Fukushima-ken, JP;
Toshinobu Hosaka, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
An input device includes a plurality of manipulation portions; an input function portion manipulated by the manipulation portions to perform an input function; a light guiding sheet facing the rear side of the plurality of manipulation portions; and a light source applying light into the light guiding sheet, wherein a rear surface opposite to a front surface of the light guiding sheet facing the manipulation portions is provided with a plurality of concave portions which is depressed to the inside of the light guiding sheet, wherein each concave portion has a circular opening and an inner surface which is a smooth concave curve surface, and wherein light propagated through the inside of the light guiding sheet is reflected by the inner surface toward the inside of the light guiding sheet, and the light is applied from the front surface of the light guiding sheet to the manipulation portions.