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:
Jun. 27, 2006
Filed:
Feb. 14, 2006
Applicant:
Wen-feng Cheng, Tu-Cheng, TW;
Inventor:
Wen-Feng Cheng, Tu-Cheng, TW;
Assignee:
HON HAI Precision Industry Co., LTD, Tu-cheng, TW;
Primary Examiner:
Int. Cl.
CPC ...
H01H 9/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A light guide for illuminating keys of a keyboard or keypad of a portable electronic device includes an array of apertures, at least one groove and at least a protrusion. The apertures are defined in the light guide and are configured to illuminate the keys via at least a light source. The groove is disposed in one end of the light guide for receiving light from the light source. The light guide can provide a desired uniform illumination by means of fewer light sources, and can improve optical uniformity by eliminating the bright areas occurring adjacent to the light sources.