Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Focusing control method for reading/writing optical disc










Image Number 6 for United States Patent #7847812.

A label pattern can be created on a label side of an optical disc under well focus control. An optical disc is first loaded in an optical disc drive with the label side thereof facing to an optical head of the optical disc drive. Then, the optical head is actuated along a focusing direction. Meanwhile, a light intensity addition signal is generated in response to optical signals reflected from the optical disc and received by the optical head. A closed-loop control operation of the optical head is performed according to the light intensity addition signal after the light intensity addition signal up-crosses a threshold. Then, a label pattern can be defined on the label side of the optical disc with the closed-loop control operation.








 
 
  Recently Added Patents
Equipment to facilitate money transfers into bank accounts
Web-based royalty system and user interface
Pyrrolidine-1,2-dicarboxamide derivatives
Processing biomass
Multi-wired antenna for mobile apparatus
Baseball themed hand clap maraca
Expandable mobile device
  Randomly Featured Patents
Substrate inspection apparatus
Bulkhead connector assembly
Control device for continuously variable transmission
Lighted wand for use at night having novel light pattern
Context linking scheme
Ambulatory infusion pump
Process for producing an aromatic polyester composition
Article sorting system and method
Dihydropyrimidines and uses thereof
Information recording and reproducing apparatus having switching means for disabling control of medium drive by a phase locked loop in a playback mode