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:
Feb. 23, 2010
Filed:
Jan. 28, 2006
Applicants:
Cheong Soo Seo, Seongnam, KR;
Gyoung IL Cho, Seoul, KR;
Sang Hyune Baek, Suwon, KR;
Inventors:
Assignees:
Angstrom, Inc., Seongnam, KR;
Stereo Display, Inc., Anaheim, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
The objective of the present invention is to provide a high-speed, miniaturized, low-cost DVD recording and reproducing system. The present invention is particularly directed to a motorless optical pick-up device for recording and/or reading information on or from an optical disc (CD or DVD), which provides focusing, tracking, seamless layer jumping, tilt compensation, and CD/DVD compatibility.