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
Methods of making a diagnostic device by interweaving hydrophobic and hydrophilic fibers, and diagnostic device therefrom
Performance apparatus, a method of controlling the performance apparatus and a program recording medium
Determining phase-specific parameters of a physiological variable
System and method of automatic piloting for in-flight refuelling of aircraft, and aircraft comprising said system
Pet carrier
Luminescent substrate for liciferase
Establishing a graphical user interface (`GUI`) theme
  Randomly Featured Patents
Contoured foam mattress
Wet-dry vacuum cleaner
Image processing apparatus, image processing program, electronic camera, and image processing method for image analysis of magnification chromatic aberration
Soft x-ray submicron lithography using multiply charged ions
Lens-driving unit
Solar powered mailbox
Sealable containers
Split blade housing for power operated rotary knife
Electrophotographic color printer apparatus and method with improved registration of colors
Methods for determining decoding order in a MIMO system with successive interference cancellation