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. 03, 2007
Filed:
Oct. 28, 2002
Applicant:
Bong-hwoan Choi, Cyeonggi-do, KR;
Inventor:
Bong-hwoan Choi, Cyeonggi-do, KR;
Assignee:
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method detects a disc using signals generated from a light irregularly reflected from pits formed on a recording surface of the disc. The method detects a ratio of a peak-to-peak value of a first signal generated from the irregular reflection to a peak-to-peak value of a second signal generated from the irregular reflection. The method further detects the disc according to magnitudes of the first and second signals and the detected ratio.