Optical disc apparatus and method of controlling the same

• Main Authors: SHIMADA, YOSHIAKI, KINOSHITA, MASAKATSU
• Format: Patent
• Language: English; French; German
• Published: 23.01.2008
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

An optical disc device includes a spindle motor (22) which rotates an optical disc, a optical pickup (28) which irradiates the laser light onto the optical disc, a feed motor (66) which moves the optical pickup in the radial direction, an encoder board (62) including transmittance or reflectance cyclically varying along a direction parallel to a movement direction of the optical pickup, a first emission section (26a) which moves following the movement of the optical pickup and which concurrently irradiates light onto the encoder board, a pickup position sensor (26) including a first light receiver (26b) section which receives reflected light or transmitted light of the light irradiated onto the encoder board, a pickup position detection section (26) which detects a position of the optical pickup in accordance with a output signal from the first light receiver section of the pickup position sensor, a second light emission section (87) which irradiates light onto variable area of the optical disc, the variable area including reflectance or transmittance cyclically varying, a rotation encoder (87) including a second light receiver section which receives a reflected light or a transmitted light of the light irradiated onto the variable area, a rotation position detection section (89, 90) which detects a rotation position of the optical disc in accordance a output signal from the second light receiver section, and a control section (80) which controls a recording dot marks on a label surface of the optical disc by driving the feed motor to move the pickup in the radial direction based on the rotation position detected by the rotation position detection section and the position detected by the pickup position detection section and driving the optical pickup to control a intensity of the laser light in accordance with the rotation position detected by the rotation position detection section.