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:
May. 09, 1995
Filed:
Oct. 18, 1993
Makoto Iida, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A focus draw-in method for an optical disc device, includes the steps of detecting a peak of a focus error signal, and after detecting the peak, applying a driving force to an optical device in a direction of the detected peak until the relative speed between a disc face and the optical device becomes small, and effecting focus control at a time point when the relative speed between the disc face and the optical device has become small. By the method noted above, the focus draw-in function with a high performance capable of effecting an efficient draw-in even when the relative speed between the disc face and the optical device is large, may be advantageously realized.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile