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:
Jan. 02, 1996
Filed:
Jul. 16, 1993
Kyosuke Yoshimoto, Amagasaki, JP;
Yoshiki Nakajima, Amagasaki, JP;
Kimiyuki Koyanagi, Amagasaki, JP;
Osamu Ito, Amagasaki, JP;
Akira Mashimo, Tokorozawa, JP;
Hiroyuki Onda, Hoya, JP;
Yutaka Kobayashi, Musashino, JP;
Koji Yamana, Setagaya, JP;
Mitsubishi Electric Corporation, , JP;
Teac Corporation, , JP;
Abstract
The disk drive apparatus of the present invention has an optical pickup that jumps a track to perform track jumping when a jumping voltage is impressed, and that traces a track by performing brake operation when a braking voltage is applied, and actuator that drives the optical pickup, a signal processing part that performs focus and tracking control with respect to the optical pickup, a movement time measurement part that measures the movement time when a light beam emitted from the optical pickup is moved to cross a track to a required track, a voltage control part that uses the results of measurement to generate parameters and a voltage value that is applied to the actuator, a storage part that stores voltage value that is generated by the voltage value setting part, and that after a disk is loaded, first stores data of that disk in the storage part and uses those data values according to the track jump operation.