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:
Aug. 18, 1998
Filed:
Jun. 02, 1997
Satoru Maeda, Saitama-ken, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A track jump control apparatus for a disc reproducing system having a transport unit for moving a pickup element that reads data recorded on the disc in the radial direction of the disc at a high speed. The system also has a detecting unit for detecting a moving direction of the pickup element unit based on a pick-up signal output from the pickup element while the pickup element moves in the radial direction of the disc, and a protection unit for stopping the pickup element moved by the transport unit when the pickup element is judged to be moving in a different direction from the direction moved by the transport unit. The apparatus has a measuring unit for measuring a pulse duration of the picked-up signal, which is continuously obtained from the pickup element while the pickup element moves in the radial direction of the disc at a high speed. The apparatus also has a control unit for inverting a detected result of the detecting unit when the pulse duration of the picked-up signal is beyond a specific limit based on the measured result of the measuring unit.