Claims
- 1. A method of calibrating operating parameters of an optical disk drive, comprising:
initially calibrating operating parameters when the optical disk drive is produced or during a repair operation; and field calibrating selected ones of the operating parameters during normal operation of the optical disk drive.
- 2. The method of claim 1, wherein initially calibrating operating parameters includes
loading initial values of the operating parameters; and adjusting the operating parameters for optimum performance of the optical disk drive.
- 3. The method of claim 1, wherein field calibrating selected ones of the operating parameters includes
reading initial values of the selected ones of the operating parameters; and adjusting the selected ones of the operating parameters for optimum performance of the optical disk drive.
- 4. The method of claim 1, wherein field calibrating selected ones of the operating parameters includes calibrating the selected ones of the operating parameters under different operating conditions and over different optical media.
- 5. The method of claim 4, wherein calibrating the selected ones of the operating parameters under different operating conditions includes calibrating the selected ones of the operating parameters under a reading condition and under a writing condition.
- 6. The method of claim 4, wherein calibrating the selected ones of the operating parameters over the different optical media includes calibrating the selected ones of the operating parameters over a premastered media and a writeable media.
- 7. The method of claim 1, wherein field calibrating selected ones of the operating parameters includes calibrating a first set of operating parameters during a power on operation.
- 8. The method of claim 7, wherein the optical disk drive includes a focus servo system and a tracking servo system, and wherein calibrating the first set of operating parameters includes calibrating at least one parameter from the set consisting of detector input gains, a focus sum threshold, tracking error signal offsets, and tracking error signal gains.
- 9. The method of claim 1, wherein field calibrating selected ones of the operating parameters includes calibrating a second set of operating parameters when a new optical media is inserted.
- 10. The method of claim 9, wherein the optical disk drive includes a focus servo system and a tracking servo system, and wherein calibrating the second set of operating parameters includes calibrating at least one parameter from the set consisting of detector input gains, a focus sum threshold, focus error signal gains, focus error signal offsets, tracking error signal gains, and tracking error signal offsets.
- 11. The method of claim 1, wherein field calibrating selected ones of the operating parameters includes calibrating a third set of operating parameters during error recovery.
- 12. The method of claim 11, wherein the optical disk drive includes a focus servo system and a tracking servo system, and wherein calibrating the third set of operating parameters includes calibrating at least one parameter from the set consisting of detector input gains, a focus sum threshold, focus error signal gains, focus error signal offsets, tracking error signal gains, tracking error signal offsets, crosstalk offsets, a tracking loop gain, a focus loop gain, notch filter parameters, focus error signal inverse non-linearity parameters, and tracking error signal inverse non-linearity parameters.
- 13. An optical disk drive, comprising:
an optical pick-up unit; an analog processor coupled to receive signals from detectors in the optical pick-up unit and provide digital signals; at least one processor coupled to receive the digital signals, the at least one processor calculating a control signal; and a driver coupled to control the position of the optical pick-up unit in response to the control signal, wherein the at least one processor executes an algorithm that
initially calibrates operating parameters when the optical disk drive is produced or during a repair operation; and field calibrates selected ones of the operating parameters during normal operation of the optical disk drive.
- 14. The drive of claim 13, wherein the at least one processor initially calibrates operating parameters by
loading initial values of the operating parameters; and adjusting the operating parameters for optimum performance of the optical disk drive.
- 15. The drive of claim 13, wherein the at least one processor field calibrates selected ones of the operating parameters by
reading initial values of the selected ones of the operating parameters; and adjusting the selected ones of the operating parameters for optimum performance of the optical disk drive.
- 16. The drive of claim 13, wherein the at least one processor field calibrates selected ones of the operating parameters by calibrating the selected ones of the operating parameters under different operating conditions and over different optical media.
- 17. The drive of claim 16, wherein calibrating the selected ones of the operating parameters under different operating conditions includes calibrating the selected ones of the operating parameters under a reading condition and under a writing condition.
- 18. The drive of claim 16, wherein calibrating the selected ones of the operating parameters over the different optical media includes calibrating the selected ones of the operating parameters over a premastered media and a writeable media.
- 19. The drive of claim 13, wherein the at least one processor field calibrates a first set of operating parameters during a power on operation.
- 20. The drive of claim 19, wherein the optical disk drive includes a focus servo system and a tracking servo system, and wherein the at least one processor field calibrates a first set of operating parameters by calibrating at least one parameter from the set consisting of detector input gains, a focus sum threshold, tracking error signal offsets, and tracking error signal gains.
- 21. The drive of claim 13, wherein the at least one processor field calibrates a second set of operating parameters when a new optical media is inserted.
- 22. The drive of claim 21, wherein the optical disk drive includes a focus servo system and a tracking servo system, and wherein the at least one processor field calibrates a second set of operating parameters by calibrating at least one parameter from the set consisting of detector input gains, a focus sum threshold, focus error signal gains, focus error signal offsets, tracking error signal gains, and tracking error signal offsets.
- 23. The drive of claim 13, wherein the at least one processor field calibrates a third set of operating parameters during error recovery.
- 24. The drive of claim 23, wherein the optical disk drive includes a focus servo system and a tracking servo system, and wherein the at least one processor field calibrates a third set of operating parameters by calibrating at least one parameter from the set consisting of detector input gains, a focus sum threshold, focus error signal gains, focus error signal offsets, tracking error signal gains, tracking error signal offsets, crosstalk offsets, a tracking loop gain, a focus loop gain, notch filter parameters, focus error signal inverse non-linearity parameters, and tracking error signal inverse non-linearity parameters.
- 25. An optical disk drive, comprising:
means for initially calibrating operating parameters of the optical disk drive; and means for field calibrating operating parameters of the optical disk drive.
- 26. The drive of claim 25, wherein the means for field calibrating includes
means for calibrating first selected operating parameters on power up; means for calibrating second selected operating parameters when new media is inserted; and means for calibrating third selected operating parameters on error recovery.
RELATED APPLICATIONS
[0001] This application is related to provisional application Serial No. 60/264,351, entitled “Optical Disk Drive Servo System,” by Ron J. Kadlec, Christopher J. Turner, Hans B. Wach, and Charles R. Watt, from which this application claims priority, herein incorporated by reference in its entirety.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60264351 |
Jan 2001 |
US |