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. 18, 1995
Filed:
May. 25, 1993
Wataru Hasegawa, Tokorozawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A track jump controlling apparatus controls a track jump operation of an optical pickup, which is adapted to emit a light beam onto a recording medium of disc shape, receive a reflected or transmitted light from the optical disc and generate a tracking error signal. The track jump controlling apparatus is provided with: a tracking servo-controlling device, coupled to the optical pickup, for performing a tracking servo-control on the basis of the tracking error signal; a driving device for driving the optical pickup to move the light beam in a radial direction of the recording medium according to jump data including a kick pulse to accelerate the light beam and a brake pulse to decelerate the light beam; an eccentricity detecting device for detecting an amount of eccentricity of the recording medium, and outputting an eccentricity signal which indicates the amount of eccentricity; and a jump data generating device, coupled to the eccentricity detecting device and the driving device, for changing at least one of a pulse width and a crest value of the brake pulse on the basis of the eccentricity signal, and generating the jump data to the driving device.