Mitsubishi Electric Corporation

Teac Corporation

Yoshiaki Umeda

Kazuhiko Nakane

Akira Mashimo

Masaharu Ogawa

Hiroshi Tsuyuguchi

Teruo Furukawa

Yoshiaki Sakai

Akira Nikaido

Manabu Ogura

Hiroyuki Onda

Katsuya Enami

Hiroo Shimegi

Tetsuro Araki

Shigeharu Honda

Fumio Sakamoto

A disk apparatus comprising a controller receiving commands from a command input device and controlling an entire operation of the disk apparatus. The rotating control function is coupled to the controller for controlling the first motor. The pickupmotor control function is coupled to the controller for controlling the second motor. The pickup control function is coupled to the controller for controlling a focusing operation and a tracking operation of the pickup. And the signal processing function is coupled to the controller for processing a recording signal to be recorded on the disk-shaped recording medium and a reproduced signal read out therefrom. The controller is comprised function-stop function for determining whether or not any command is received from the command input device during a predetermined period of time in a state. The disk apparatus is maintained in a predetermined mode and for stopping predetermined function among the rotating control function, the pickup motor control function, the pickup control function, and the signal processing function when it is determined that no command is received from the command input device during the predetermined period.

Disk apparatus having a power consumption reducing mechanism

An apparatus for applying a magnetic field has a permanent magnet, pivotally supported, which has an approximate cylindrical shape, respective semicircles of a circular section thereof being magnetized as N and S poles, and a driving coil, located in the vicinity of the permanent magnet so that the permanent magnet can partially penetrate inside the loops of the driving coil, the rotation and the positioning of the permanent magnet being controlled by the strength and/or directions of current flow in the driving coil. The apparatus is used for a magneto-optical disk storage. Since the driving coil is close to the permanent magnet, the pivoting of the permanent magnet can be controlled with a fast response. In addition, the apparatus can be made relatively small.

Apparatus for applying magnetic field and magneto-optical disk storage

Growing community of inventors

Amagasaki, Japan

Yoshiaki Umeda