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:
Nov. 01, 2005
Filed:
Jun. 05, 2003
Tetsuro Hanahara, Fukui, JP;
Takayuki Ishikawa, Fukui, JP;
Yoshiharu Abe, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A lighted switch sheet of the invention has a structure, which comprises a sheet having a plurality of movable contacts of a hemispherical shape disposed in a plurality of fixing holes, and an EL element affixed on an upper surface of the sheet. The EL element has an optically transmitting substrate provided with an optically transmitting electrode layer, light-emitting layer and back electrode layer formed in an overlapping manner on an underside surface thereof, and through holes of a size slightly smaller than an outer diameter of the movable contacts formed above their respective movable contacts. The invention provides for the lighted switch sheet with a small number of structural components and a simple structure at low cost.