Patent ID: 6944109
Filing Date: 2005-09-13
Classification: G11B

Abstract:
1. An automatic control method for generating stable laser power of an optical disk drive, the optical disk drive comprising: an optical pick-up unit for emitting laser beams; a microprocessor for generating control signals; and an analog front end (AFE) circuit for receiving the control signals generated by the microprocessor, generating a writing voltage for the optical pick-up unit according to the control signals so as to make the optical pick-up unit emit laser beams, receiving watching signals generated when the optical pick-up unit emits laser beams, and adjusting the writing voltage according to a difference amount between the watching signals and a reference voltage so as to adjust a magnitude of the laser beams emitted by the optical pick-up unit; the control method comprising: generating a first function according to a relationship between the control signals transmitted from the microprocessor to the analog front end circuit and the difference amount between the watching signals and the reference voltage; wherein when the analog front end circuit receives the watching signal, the analog front end circuit adjusts the writing voltage according to the first function and a reference function so as to adjust the magnitude of the laser beams emitted by the optical pick-up unit.