Method for adjusting mechanical error of optical disc reading device
AssigneeBenq Corporation
InventorsJung-Tsung Cheng, Cheng-Chieh Chuang
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Abstract
The present invention provides a method for adjusting the mechanical error of an optical disc reading device. The optical disc reading device consists of a driving device and an optical pickup. The driving device has a base plate for supporting and rotating an optical disc. The method consists of moving the optical pickup to surface of optical disc, the optical pickup emitting two tracking light spots onto the surface, and the optical pickup reciprocally moving relative to the surface. Next, the optical pickup reads reflected signal of two tracking light spots for generating a track crossing signal. By using the track crossing signal, the method adjusts position of optical pickup relative to the base plate.
Claims22
A method for adjusting a moving trace of an optical pickup of an optical disc reading device, said optical disc reading device comprising a driving device, said driving device comprising a base plate for supporting and rotating an optical disc having a surface, said surface having at least one track, said method comprising:
- moving said optical pickup to said surface along said moving trace, said optical pickup emitting tracking light spots onto said surface;
- performing relative movement between said tracking light spots and said track along said moving trace;
- generating a track crossing signal by reading reflected signals from said surface corresponding to said tracking light spots;
- and
- adjusting said moving trace of said optical pickup relative to said base plate according to said track crossing signal.
A method for examining a moving trace of an optical pickup of an optical disc reading device, said optical reading device comprising a driving device, said driving device including a base plate for supporting and rotating a disc, said disc having a surface, said surface having at least one track, said method comprsing:
- moving said optical pickup along said moving trace to said surface, for emitting tracking light spots on said surface;
- performing relative movement between said tracking light spots and said track along said moving trace;
- reading the reflected signals of said tracking light spots;
- calculating said reflected signals to generate a track crossing signal;
- and
- examining if said track crossing signal is optimized.
An optical disc reading apparatus for operating an optical disc, said optical disc having a surface with at least one track, comprising:
- a base plate for supporting and rotating said optical disc;
- an optical pickup for omitting tracking light spots on said surface so that a track crossing signal is generated by reading reflected signals from said surface corresponding to said tracking light spots;
- a guiding unit for providing a moving trace to guide said optical pickup to said surface;
- a driving device for moving said optical pickup along said moving trace;
- and
- adjustment unit for adjusting said moving trace of said optical pickup relative to said base plate.
Dependencies are inferred from the claim text.