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:
Nov. 30, 2010
Filed:
May. 16, 2006
Ryohei Yasuda, Kanagawa, JP;
Takafumi Arai, Kanagawa, JP;
Yukihiko Okada, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical disc apparatus includes: a section for controlling an actuator by generating a voltage indication value indicative of a drive voltage applied to the actuator driving an objective lens; an section for periodically detecting the voltage indication value; a section for going into an excess detection mode when the voltage indication value outside a tolerable range is detected, and starting a re-detection period when the voltage indication value inside the tolerable range is detected, and remaining in the excess detection mode and extending the re-detection period when the voltage indication value outside the tolerable range is detected during the re-detection period, and stopping the excess detection mode when the voltage indication value outside the tolerable range is not detected again during the re-detection period; and an section for limiting the voltage indication value when staying in the excess detection mode for longer than a fail-safe action start period.