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:
Jan. 17, 2012
Filed:
Dec. 10, 2008
Naoki Tatehata, Kyoto, JP;
Tsutomu Aisaka, Osaka, JP;
Yousuke Chikahisa, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The movable contact unit with a light-guiding function has the following structure. An uneven section is formed in a section that is to be lighted on the lower surface of a TPU base sheet. A film with a refractive index of light lower than that of the base sheet is disposed beneath the lower surface of the base sheet in a manner that the uneven section is embedded in the film. Besides, an adhesive layer is disposed beneath the film so as to hold a movable contact. The movable contact unit structured above is effectively employed for a lighted panel switch capable of reducing loss in amount of light and providing the section that is to be lighted with required illuminance.