Optical disc system having momentum compensation

Optical disc system having servo motor and servo error detection

Optical disc system having servo motor and servo error...

Optical disc system including current monitoring circuit...

Optical disc system using multiple optical heads for accessing i

Optical disc system with an optical disc having at least one cha

Optical disc system with improved track jumping operation

Optical disc system, optical disc and recording method

Optical disc tilt control apparatus

Optical disc tilt detection and tilt servo control method

Optical disc track access apparatus and method for optical...

Optical disc track access apparatus and method for optical...

Optical disc tracking control device, tracking control...

Optical disc tracking control device, tracking control...

Optical disc tracking servo circuit having compensation for disc

Optical disc tracking system with switching of tracking error si

Optical disc transport system

Optical disc unit and method and apparatus for writing and/or re

Optical disc unit having guide shaft for guiding optical pickup

Optical disc unit, optical disc recording method, and...