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AssigneeLite-On It Corporation
InventorsLing-Chen Chang, Jia-Yu Liu, Han-Min Tan
Estimating the term…
A method and apparatus for controlling the tilt between the optical axis of an optical pick-up head and an optical disc applied in an optical disc drive is provided. A trapezoidal-wave signal in a radio frequency signal is received, wherein the trapezoidal-wave signal includes a rising edge and a falling edge. And a slope sum is calculated and so is an amplitude or a time domain area of the trapezoidal-wave signal. Then, a tangential tilt control parameter is generated according to the slope sum, and a radial tilt control parameter is generated according to the amplitude or the time domain area of the trapezoidal-wave signal. Thus, the optical disc drive is controlled according to the tangential tilt control parameter and the radial tilt control parameter for the optical axis of the optical pick-up head to be perpendicular to the optical disc.
A method for controlling a tilt between an optical axis of an optical pick-up head and an optical disc, applied in an optical disc drive, the method comprising:
An apparatus for controlling a tilt between an optical axis of an optical pick-up head and an optical disc, applied in an optical disc drive, the apparatus comprising:
A method for determining a set of tilt control parameters for controlling an optical axis of an optical pick-up head to an optical disc in an optical disc drive, the tilt control parameters comprising a tangential tilt control parameter, the method comprising:
Dependencies are inferred from the claim text.