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
Inspection systems and methods for detecting defects on extreme ultraviolet mask blanks
Color LED display device without color separation
Sink
Semiconductor device and method for fabricating the same
Selective high frequency spinal cord modulation for inhibiting pain with reduced side effects, and associated systems and methods
Real-time RSL monitoring in a web-based application
Touch sensing technology
  Randomly Featured Patents
Prismatic-cell battery pack with integral coolant passages
Spinal implant
Method of producing 2,3,6 trimethylphenol
Methods and devices for obtaining sampling clocks
Electromagnetic wave shielding filter
Probe apparatus
Seat belt webbing energy management device
Telephone charge management system
Universal crimping tool
Differential clamp-on railway vehicle wheel detector