Detecting light spot movement direction for an optical disk

Detector for moving velocity of light beam spot

Detrack detecting system in an optical recording/reproducing app

Deviation correction apparatus for optical disc light beams

Device and method for automatically controlling a servo loop gai

Device and method for automatically controlling sled loop...

Device and method for compensating for tilt in an optical...

Device and method for controlling tilt servo

Device and method for controlling tilt servo

Device and method for detecting non-writable region of...

Device and method for focusing on optical disk

Device and method for scanning an optical recording medium...

Device and method for use in optical record carrier systems

Device and method of temperature control for optical storage...

Device and system for reading recording media with cross-talk co

Device capable of detecting vibration/shock

Device for accessing address information in an optical disc

Device for controlling focus of an optical disk apparatus

Device for detecting cross talk level of optically read signal

Device for detecting the position of a recording/reproducing ele