US 5,347,506 A · Optical disk player including a plurality of independent pick-ups

Abstract

An optical disk player for simultaneously reading data recorded on different areas of the optical disk is disclosed. The optical disk player provides a plurality of pairs of optical pick-ups and pick-up positioning mechanisms. A rotational speed of the optical disk is controlled according to a synchronization signal obtained from a first pick-up and the first pick-up can read the recorded data by a normal method, however, other pick-ups need to change read rates according to respective linear velocity. Therefore, reading speed changing circuits are provided for each of the optical pick-ups except a first pick-up and they change read rates according to linear velocities of the optical disk at reading positions.

Claims4

Dependent claims

An optical disk player for simultaneously reading a plurality of data respectively recorded on a plurality of recording areas of an optical disk, comprising:

a plurality of optical pick-ups for reading said data;
said plurality of optical pick-ups including a first optical pick-up and at least one other optical pick-up;
a plurality of pick-up positioning mechanisms which are respectively provided for each of said plurality of optical pick-ups, and independently move corresponding ones of said plurality of optical pick-ups;
reading speed changing means which are respectively provided for each of said at least one other optical pick-up, and which change read rates of said at one other optical pick-up according to linear velocities of said optical disk at reading positions of said at least one other optical pick-up.

1 more element

Dependencies are inferred from the claim text.

Optical disk player including a plurality of independent pick-ups

Life of this patent

Optical disk player including a plurality of independent pick-ups

Life of this patent

Abstract

Claims4