Optical pickup apparatus including a moveable pickup driver usin

Details Optical pickup apparatus including a moveable pickup driver usin Optical pickup apparatus including a moveable pickup driver usin

1993-01-07

1994-11-08

Young, W. R.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4425, 369 4429, 369 4435, 369121, G11B 700

Patent

active

053633652

ABSTRACT:
An optical pickup apparatus has a pickup movable part of integrally driven type in which the number of signal wires connected to the pickup driver part is decreased, and auxiliary signal wires required hitherto need not be provided. The optical pickup apparatus includes a pickup driver part including a semiconductor laser emitting a laser beam for forming a spot of the laser beam on a recording surface of a recording medium, a control circuit controlling the operation of the pickup driver part, and a plurality of signal wires connected between the pickup driver part and the control circuit for the signal transmission and reception between them. The control circuit includes a signal selector for selecting one of a plurality of input signals and outputting the selected signal, and a counter for supplying signal selecting information to the signal selector in a time division mode, so that the plural input signals can be supplied by the plural signal wires in a time division multiplex mode.

REFERENCES:
patent: 4700056 (1987-11-01), Silvy et al.
patent: 4937440 (1990-06-01), Hofer et al.
patent: 5050149 (1991-09-01), Ishii et al.
patent: 5084849 (1992-01-01), Ishii et al.
patent: 5199011 (1993-03-01), McDonald et al.

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