Samsung Electronics Co., Ltd.

Nark Seog Kim

Sung Min Oh

An apparatus for judging an optical disk by detecting a phase difference between E and F signals corresponding to two sub-beam signals detected by an optical pick-up apparatus. The apparatus includes a first comparator for comparing a voltage corresponding to a first sub-beam inputted from the RF amplifier and a previously set reference voltage and selectively outputting a high level signal or a low level signal in accordance with a result of the comparison, a second comparator for comparing a voltage corresponding to a second sub-beam inputted from the RF amplifier with a previously set reference voltage and selectively outputting a high level signal or a low level signal in accordance with a result of the comparison, a gate circuit for outputting a low level signal when two signals inputted from the first comparator and second comparator are identical and outputting a high level signal when two signals outputted from the same are not identical, a controller for judging the type of a disk mounted in the deck in accordance with an output signal inputted from the gate circuit, and a servo unit for controlling the driving of the optical type pick-up apparatus in accordance with a control signal from the controller.

Growing community of inventors

Suwon, South Korea

Nark Seog Kim