Apparatus for discriminating between different optical disk types

• Main Authors: NARK-SEOG KIM, SUNG-MIN OH
• Format: Patent
• Language: English
• Published: 07.07.1999
• Edition: 6
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

The apparatus includes a first comparator 12 for comparing a voltage corresponding to a first sub-beam inputted from the RF amplifier 11 and a previously set reference voltage, a second comparator 13 for comparing a voltage corresponding to a second sub-beam inputted from the RF amplifier 11 with a previously set reference voltage, a gate circuit 14 for outputting a low level signal when two signals inputted from the first comparator 12 and second comparator 13 are identical and outputting a high level signal when two signals outputted from the same are not identical, a controller 15 for judging the type of a disk mounted in the deck in accordance with an output signal inputted from the gate circuit 14, and a servo unit 16 for controlling the driving of the optical type pick-up apparatus in accordance with a control signal from the controller 15.