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US 7,257,055 B2Granted
Method and related apparatus for diagnosing crosstalk within an optical pick-up unit by utilizing firmware
AssigneeVIA Technologies, Inc.
InventorRicky Chang
Life of this patent
Estimating the term…
Abstract
A method and a related apparatus for diagnosing crosstalk within an optical pick-up unit by utilizing firmware. The method includes calculating a tracking driving signal and a focusing driving signal according to a tracking error signal and a focusing error signal respectively, adding a noise to the focusing driving signal to form a test focusing driving signal through executing firmware, driving an optical pick-up unit by the tracking driving signal and the test focusing driving signal, and diagnosing characteristics of the pick-up unit through observing the tracking error signal.
Claims20
A method for diagnosing an optical disk drive comprising:
- (a) utilizing an optical pick-up unit for outputting an incident laser to a track on an optical disk and reading a reflecting laser modulated by the track for generating a tracking error signal and a focusing error signal;
- (b) calculating a tracking driving signal according to the tracking error signal, and calculating a focusing driving signal according to the focusing error signal;
- (c) utilizing a firmware of the optical disk drive for mixing a noise with the focusing driving signal to generate a test focusing driving signal;
- (d) adjusting a position of the optical pick-up unit corresponding to the optical disk according to the test focusing driving signal and the tracking driving signal;
- and
- (e) determining whether the focusing error signal outputted from the optical pick-up unit interferes with the tracking error signal outputted from the optical pick-up unit according to the tracking error signal.
3 more elements
A method for diagnosing an optical disk drive comprising:
- (a) utilizing an optical pick-up unit for outputting an incident laser to a track on an optical disk and reading a reflecting laser modulated by the track for generating a tracking error signal and a focusing error signal;
- (b) calculating a tracking driving signal according to the tracking error signal, and calculating a focusing driving signal according to the focusing error signal;
- (c) utilizing a firmware of the optical disk drive for mixing a noise with the tracking driving signal to generate a test tracking driving signal;
- (d) adjusting a position of the optical pick-up unit corresponding to the optical disk according to the test tracking driving signal and the focusing driving signal;
- and
- (e) determining whether the tracking error signal outputted from the optical pick-up unit interferes with the focusing error signal outputted from the optical pick-up unit according to the focusing error signal.
3 more elements
An optical disk drive comprising:
- an optical pick-up unit for outputting an incident laser to a track on an optical disk and reading a reflecting laser modulated by the track for generating a tracking error signal and a focusing error signal;
- a focusing controller for calculating a focusing driving signal according to the focusing error signal;
- a tracking controller for calculating a tracking driving signal according to the tracking error signal;
- a memory for storing a noise processing program;
- a microprocessor electrically connected to the memory for running the noise processing program to mix a noise with the focusing driving signal to generate a test focusing driving signal;
- and
- a servo system electrically connected to the microprocessor and the tracking controller for adjusting a position of the optical pick-up unit corresponding to the optical disk according to the test focusing driving signal and the tracking driving signal.
4 more elements
An optical disk drive comprising:
- an optical pick-up unit for outputting an incident laser to a track on an optical disk and reading a reflecting laser modulated by the track for generating a tracking error signal and a focusing error signal;
- a focusing controller for calculating a focusing driving signal according to the focusing error signal;
- a tracking controller for calculating a tracking driving signal according to the tracking error signal;
- a memory for storing a noise processing program;
- a microprocessor electrically connected to the memory for running the noise processing program to mix a noise with the tracking driving signal to generate a test tracking driving signal;
- and
- a servo system electrically connected to the microprocessor and the tracking controller for adjusting a position of the optical pick-up unit corresponding to the optical disk according to the test tracking driving signal and the focusing driving signal.
4 more elements
Dependencies are inferred from the claim text.