The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 08, 1994
Filed:
Jan. 07, 1993
Takumi Ajima, Yokohama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
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.