Optical disk device and power supply method
AssigneeKabushiki Kaisha Toshiba
InventorsManabu Murakami, Shigeru Fukinuki, Naoki Kimura
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Abstract
According to one embodiment, an optical disk device includes types of semiconductor laser diodes configured to emit laser light of different wavelengths, an output control circuit configured to control light output of each semiconductor laser diode, and a composite power source configured to generate voltages required for driving the types of semiconductor laser diodes and operating the output control circuit from a single power source voltage and to selectively output the generated voltages. The composite power source includes an input port to input an external control signal at a time of voltage selection and is configured to change the output voltage stepwise in response to the control signal.
Claims14
An optical disk device comprising:
- a plurality of semiconductor laser diodes configured to emit laser lights of different wavelengths;
- an output controller configured to control light output of semiconductor laser diodes;
- and
- a composite power source configured to generate a plurality of voltage power supplies from a single voltage power source in order to drive the plurality of semiconductor laser diodes and to operate the output controller, and configured to selectively output the generated power supplies, the composite power source comprising an input port configured to receive a first control signal at a time of voltage selection and being configured to cause the output voltage to change from a selected first voltage to a selected second voltage via multiple voltage levels between the selected first and second voltages in response to the first control signal.
A power supply method for an optical disk device comprising a plurality of semiconductor laser diodes configured to emit laser lights of different wavelengths, an output controller configured to control light output of semiconductor laser diodes, and a composite power source configured to generate a plurality of voltage power supplies from a single voltage power source in order to drive the plurality of semiconductor laser diodes and to operate the output controller, and configured to selectively output the generated power supplies, the method comprising:
- receiving a first control signal at an input port of the composite power source at a time of voltage selection;
- and
- causing the output voltage of the composite power source to change from a selected first voltage to a selected second voltage via multiple voltage levels between the selected first and second voltages based on the received first control signal.
Dependencies are inferred from the claim text.