Laser drive, optical disc apparatus, and laser-driving method
AssigneeSony Corporation
InventorsMotoi Kimura, Yasuyuki Takeshita, Hidetaka Kodama
Life of this patent
Estimating the term…
Abstract
A laser drive includes a variable output voltage source that can control an output voltage, a laser source connected to the variable output voltage source, a laser drive circuit that drives the laser source, and a monitoring controller that monitors an operating voltage of the laser drive circuit and controls the output of the variable output voltage source such that the monitored operating voltage becomes equal to a desired value.
Claims11
A laser drive, comprising:
- a variable output voltage source provided to control an output voltage;
- a laser source connected to the variable output voltage source;
- a laser drive circuit that drives the laser source;
- and
- a monitoring controller that directly monitors an operating voltage of an element of the laser drive circuit exclusively, and controls the output of the variable output voltage source such that the monitored operating voltage becomes equal to a desired value.
An optical disc apparatus that radiates laser light onto an optical disc to record and/or reproduce data, comprising:
- a laser drive including a variable output voltage source provided to control an output voltage;
- a laser source connected to the variable output voltage source;
- a laser drive circuit that drives the laser source;
- and
- a monitoring controller that directly monitors an operating voltage of an element of the laser drive circuit exclusively, and controls the output of the variable output voltage source such that the monitored operating voltage becomes equal to a desired value.
A laser-driving method for driving a laser source connected to a variable output voltage source that can control an output voltage, the laser-driving method comprising:
- monitoring, directly, an operating voltage of an element of the laser drive circuit exclusively;
- and
- controlling the output of the variable output voltage source such that the monitored operating voltage becomes equal to a desired value.
Dependencies are inferred from the claim text.