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
Output device, source apparatus, television set, system, output method, program, and recording medium
Graphical communication user interface with graphical position user input mechanism for selecting a display image
User interfaces
Packet transmission system and fault recovery method
Direct mode adapter based shortcut for FCoE data transfer
Intake parameter-calculating device for internal combustion engine and method of calculating intake parameter
Query processing with specialized query operators
  Randomly Featured Patents
Non-volatile multi-level semiconductor flash memory device and method of driving same
Epoxides containing a perfluorovinyl group
Coating process and apparatus
Method for assigning an IP address to a device
Automatic change method of virtual concatenation bandwidth
Battery pack for a portable communications device
Piezoelectric sensor
Process for self aligning a source region with a field oxide region and a polysilicon gate
Scanning probe microscope
Electronic ballast and method for operating an electrical lamp