Patent ID: 8111598
Filing Date: 2012-02-07
Classification: G11B

Abstract:
1. An optical disk apparatus, comprising: a rotation driving unit that rotates a recording medium on whose information recording surface a plurality of addresses is recorded; an optical pickup that records an information signal onto and plays back the information signal from the information recording surface of the recording medium that is rotated by the rotation driving unit; a light-emitting unit that irradiates a label surface of the recording medium with light; a control unit that causes the light-emitting unit to emit light based on an address selected from the plurality of addresses as a reference address and a reference signal readable from the recording medium, wherein the control unit includes the timing calculation unit calculates a showing clock count obtained by converting an angle of rotation of the recording medium from the reference position state to a light-emitting position where the light-emitting unit is caused to emit light into the clock count of the reference signal, and the emission control unit starts to count the clock count of the reference signal from the reference position state and causes the light-emitting unit to emit light when the clock count reaches the showing clock count; and an input unit that inputs a showing position of the label surface of the recording medium, wherein the timing calculation unit converts the angle of rotation of the recording medium from the reference position state until the showing position is brought into show into the showing clock count, and the emission control unit counts the clock count of the reference signal from the reference position state and causes the light-emitting unit to emit light when the clock count reaches the showing clock count.