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
Electrical stimulation lead, system, and method
Nonvolatile semiconductor storage device and a manufacturing method thereof
Three-dimensional shape data processing apparatus and three-dimensional shape data processing method
Implant free extremely thin semiconductor devices
Liquid crystal display device with a control mechanism for eliminating images
Supplier capability methods, systems, and apparatuses for extended commerce
Social community generated answer system with collaboration constraints
  Randomly Featured Patents
Fluid exchange catheter system
Cam mechanisms
High speed image processing computer
Interconnecting device for casting molded parts
Vehicle-mounted animal restraint apparatus
Network-based system for social interactions between users
Device for cutting a fiber web
Method for driving a gas-discharge panel
Process for gasifying liquid hydrocarbon fuels
System and method for selecting color tables for a color printer