Patent ID: 7315498

Claim:
A DVD reproducing apparatus comprising: a pickup to read data from a disk, which includes a pit data area to form pits depicting data along tracks, and an NBCA to read data by laser cutting in a radial direction; an RF signal processor, which includes a tracking error signal generator to generate a tracking error signal using a phase difference detection method, and an RF signal generator to perform a predetermined process for a signal output from the pickup to generate an RF signal; an NBCA data demodulator to employ the RF signal to demodulate data recorded in the NBCA; a jump controller to permit the pickup to jump over the tracks based on the tracking error signal; and a sled motor to move the pickup in the radial direction, wherein a direct current motor, a revolution of which is not subject to closed loop control, is employed as a sled motor, wherein to read data recorded in an NBCA of a disk having a non-pit area which does not form pits and is located between a pit data area and the NBCA, the jump controller moves the pickup to an initial position which is in the pit data area and is in a vicinity of a border between the non-pit area and the pit data area, and repeats a control for driving the sled motor to move the pickup toward the NBCA using a predetermined drive method until the NBCA data demodulator demodulates NBCA data, wherein to drive the sled motor to move the pickup from the initial position toward the NBCA, the jump controller fixes a gain and an offset employed by the RF signal generator to generate the RF signal, sets a rotational speed for the disk to a value corresponding to reading data in the NBCA, and turns off a tracking servo, wherein to repeat the control for driving the sled motor to move the pickup toward the NBCA, the jump controller increases a product of a voltage to be applied to the sled motor and a time length to apply the voltage, in accordance with an increase in a number of times the sled motor is driven, and wherein to move the pickup located in the NBCA to the pit data area, the jump controller applies a predetermined voltage to the sled motor, sets a time length to apply the predetermined voltage to a value corresponding to a number of times that the sled motor is driven to move the pickup from the initial position to the NBCA, and moves the pickup from the NBCA to the pit data area by single driving of the sled motor.