Resources Contact Us Home
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
Bundled flexible cable with water resistant structure
Polymeric structures comprising a siloxane
Selecting input/output components of a mobile terminal
Virtual physician acute myocardial infarction detection system and method
Lentiviral gene transfer vectors and their medicinal applications
Blueberry plant named `DrisBlueFour`
Managing personal information on a network
  Randomly Featured Patents
Method and apparatus for preventing yellowing of benzoyl peroxide solutions in acrylic adhesives
Autobrake and decel control built-in test equipment
Combined multi-section rear view mirror and anti-glare visor
Method for injection expansion molding of thermoplastic resin
Row crop attachment with sweeper chain
Paper coating or binding formulations and methods of making and using same
Detector for colliding signals in asynchronous communication
System for dynamic airflow control in a paint booth using multiple air supply plenums
Heterogeneous polyvinyl ester dispersions and powders
Elevator door tampering protection system