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:
Mar. 03, 2009
Filed:
Sep. 18, 2007
Applicants:
Sun-lyeong Hwang, Gumi-si, KR;
Ki-chan Kim, Gumi-si, KR;
Inventors:
Sun-Lyeong Hwang, Gumi-si, KR;
Ki-Chan Kim, Gumi-si, KR;
Assignee:
Samsung Electronics Co. Ltd, Suwon, Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 40/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A keypad is provided. The keypad includes an optical waveguide on the top surface of which at least one prism pattern is formed, a light source for generating light and causing the light to be incident to a side surface of the optical waveguide, and at least one optical detector located below the optical waveguide to correspond to the at least one prism pattern.