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:
Oct. 02, 2012
Filed:
Dec. 17, 2010
Akinori Yuba, Osaka, JP;
Akinori Yuba, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical disc apparatus for performing both the operation of writing data on an optical disc and the operation of reading data that is stored on the optical disc includes a motor for rotating the optical disc, an optical pickup, which irradiates the optical disc with a light beam and detects the light that has been reflected from the optical disc, an evaluation section for obtaining an indicative parameter of the distortion of a signal waveform representing the light reflected from a data stored part on the optical disc while the optical disc is being rotated by the motor, and a control section for changing the number of revolutions of the optical disc Per unit time if a variation in the indicative parameter of the distortion per rotation of the optical disc exceeds a threshold value while the optical disc is being rotated by the motor.