Sony Corporation

Takafumi Arai

Wataru Kokubo

Katsunori Kitaru

Hisao Ohtani

Takeshi Kunishima

Ryohei Yasuda

Yukihiko Okada

An optical disc apparatus includes: a section for controlling an actuator by generating a voltage indication value indicative of a drive voltage applied to the actuator driving an objective lens; an section for periodically detecting the voltage indication value; a section for going into an excess detection mode when the voltage indication value outside a tolerable range is detected, and starting a re-detection period when the voltage indication value inside the tolerable range is detected, and remaining in the excess detection mode and extending the re-detection period when the voltage indication value outside the tolerable range is detected during the re-detection period, and stopping the excess detection mode when the voltage indication value outside the tolerable range is not detected again during the re-detection period; and an section for limiting the voltage indication value when staying in the excess detection mode for longer than a fail-safe action start period.

Optical disc apparatus and control method including an excess detection mode

Disk drive device and method of setting rotational speed thereof

Growing community of inventors

Kanagawa, Japan

Takafumi Arai