Patent ID: 6181651
Filing Date: 2001-01-30
Classification: G11B

Abstract:
An optical recording/reproducing device comprising:means for projecting a light beam that focus and project a light beam onto a recording medium;first means for movement that move said means for projecting a light beam by a minute amount in a direction practically perpendicular to a track on the recording medium;means for detecting track error that generate a signal corresponding to the positional relationship of the light beam and a track;means for controlling tracking that drive said first means for movement in response to a signal of said means for detecting track error and that exercise control such that the light beam scans the track;second means for movement that move the light beam crosswise in a direction approximately perpendicular to the track on the recording medium by moving said means for projecting a light beam; andmeans for controlling searching that move the light beam across a plurality of tracks to a desired track; wherein said means for controlling searching comprise:means for generating a target speed that generate a target speed for movement of the light beam;means for detecting speed of movement that detect the speed of movement of the light beam;means for subtraction that calculate the difference of a signal of said means for generating a target speed and a signal of said means for detecting speed of movement;first means for driving that drive said first means for movement in response to a signal of said means for subtraction;means for addition that calculate the sum of a signal of said means for subtraction and a signal of said means for generating a target speed; andsecond means for driving that drive said second means for movement in response to a signal of said means for addition.