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:
Nov. 14, 2000
Filed:
Mar. 16, 1998
Yutaka Ogasawara, Yokohama, JP;
Hirotake Ando, Tokyo, JP;
Akira Miyashita, Tokorozawa, JP;
Nobuyuki Tonegawa, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An information recording and/or reproducing apparatus for recording data onto and/or reproducing data from a recording medium by irradiating a light beam emitted from a light source onto a desired track of the recording medium through an optical system. The apparatus includes (i) a single processor for executing an input/output control of the data for the apparatus and a servo process of the light beam such that the input/output control of the data and the servo process of the light beam are alternately switched at a predetermined period, and (ii) an actuator for moving the light beam on the basis of the servo process of the processor. The precision of the servo process is changed so that the precision is increased when an amount of an external disturbance is large.