Inventor

TAKASAGO MASAHIRO

JP19 patents

⚠️ This page may combine multiple inventors who share the name “TAKASAGO MASAHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TAKASAGO MASAHIRO

HITACHI LTD

Optical disc access method and optical disk storage using coarse and fine actuators

Defect detecting optical apparatus enabling recording in an alternate sector or track

Optical memory apparatus

Automatic gain control method and apparatus in optical disk system

Optical recording/reproducing method and apparatus for optical disk medium having unique control parameters

Optical information processor

Driving apparatus for semiconductor laser

Tracking following apparatus for optical disk device

Method and apparatus for optical recording and reproduction with tracking servo reducing track offset

System for optically recording information

Controlling positioning of recording/reproducing head by combining a position differentiation and a drive current integration

Optical position detecting apparatus for positioning an actuator

Optical information disc apparatus with autofocusing servo system

For jumping a light spot on a track of a recording medium

Optical information recording and reproducing apparatus with tracking servo system

Apparatus for reproducing data from a regenerative signal using a PLH circuit having loop gain control

Method of detecting light spot control signal

Method and apparatus for optical recording and reproducing with tracking servo reducing track offset

HITACHI LG DATA STORAGE INC

Built-in type optical disc apparatus