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:
Apr. 27, 2010
Filed:
Feb. 07, 2006
Yoshio Kenmochi, Tokyo, JP;
Yoshio Kenmochi, Tokyo, JP;
Sunarrow Limited, Tokyo, JP;
Abstract
Mobile phones are in a trend of having thinner configuration due to emphasis on the design. Thus, in order to meet this demand, the present invention aims to thin the key sheet portion as much as possible. The present invention provides a thin key sheetcomprising a key topmade of a metal or a resin having on the front surface or the back surface indications such as letters, symbols, graphics or the like indicating the functions of keys, a key padmade of a material having rubber elasticity such as a silicone rubber or various elastomers for supporting/fixing the key top, an EL elementformed on the back surface of the key top by means of printing, and a printed circuit boardon which a switch element is provided at its surface for turning ON/OFF of an electric circuit by the pressing of the key topand on which a circuit pattern involved therewith is formed.