Patent ID: 6724697
Filing Date: 2004-04-20
Classification: G11B

Abstract:
A layer jump control apparatus of a multilayer optical disk, comprising:an optical pickup including an object lens for reading data recorded on an optical disk having at least two layers; a digital signal processing unit for outputting a control signal for focus servo control from a signal read from the optical pickup, and restoring the original signal from the read signal; a control unit for outputting a control order for layer jump to the digital signal processing unit, controlling a focusing operation of a target layer from the signal outputted from the digital signal processing unit in accordance with the control order, and outputting a different control signal in accordance with a target layer transferring position; and an operation voltage unit for operating variably a focus lens of the optical pickup by the control signal outputted from the control unit, wherein the signal outputted from the operation voltage unit has different voltage values as an operation voltage for subordinate layer transferring and as an operation voltage for superior layer transferring.