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. 25, 2006
Filed:
Mar. 31, 2003
Naoto Takeda, Tokyo, JP;
Naoto Takeda, Tokyo, JP;
TEAC Corporation, Musashino, JP;
Abstract
An optical disk apparatus which can record data by means of transition between an amorphous state and a crystalline state and enables overwriting of data. Test data are recorded into a test area of an optical disk by radiating a laser beam of recording power. The recorded test data are erased by radiating a laser beam of erasing power to the test area of the optical disk while a rotational speed of the optical disk is varied. An erasure performance for erasing the test data is computed at each rotational speed, and the erasure performance is compared with the predetermined threshold value. The higher the rotational speed, the lower the erasure performance. From among the rotational speeds at which superior erasure performance is achieved, the maximum rotational speed is selected. Data are written over the data area of the optical disk at the thus-selected maximum rotational speed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile