Device and method for controlling an optical source driver
AssigneeToshiba Samsung Storage Technology Korea Corporation
InventorKang-soo Cho
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Abstract
A device and method for controlling a driving current with respect to an optical source of an optical disc drive are provided. The method includes changing a characteristic of a high frequency component based on a change in the peripheral temperature of on optical pickup device, modulating the driving current using the high frequency component, and applying the modulated driving current to the optical source.
Claims17
A method of controlling an optical output, the method comprising:
- generating a driving current for an optical source of an optical pickup device;
- splitting an entire temperature range in which the optical pickup operates into a room temperature region, a high temperature region, and a low temperature region;
- changing a characteristic of a high frequency component based on a change of a peripheral temperature of the optical pickup device into one of the room temperature region, the high temperature region, and the low temperature region;
- modulating the driving current using the changed high frequency component;
- and
- applying the modulated driving current to the optical source.
An optical disc drive comprising:
- an optical pickup device comprising an optical source;
- a temperature sensor configured to sense a temperature signal from the optical pickup device;
- a temperature detection unit configured to detect a peripheral temperature of the optical disc drive using the temperature signal sensed by the temperature sensor;
- an optical source driver configured to generate a driving current applied to the optical source;
- and
- a high frequency modulation (HFM) circuit configured to supply a HFM component used to modulate the driving current to the optical source driver, to split an entire temperature range in which the optical pickup operates into a room temperature region, a high temperature region, and a low temperature region, wherein the HFM component comprises a characteristic that is changed based on a change in the peripheral temperature detected by the temperature detection unit into one of the room temperature region, the high temperature region, and the low temperature region.
A method of modulating a driving current for an optical source of an optical pickup device, the method comprising:
- splitting an entire temperature range in which the optical pickup operates into a room temperature region, a high temperature region, and a low temperature region;
- detecting a change in the peripheral temperature of the optical pickup device into one of the room temperature region, the high temperature region, and the low temperature region;
- and
- modulating the driving current supplied to the optical source using a high frequency component that has a characteristic that is changed based on the detected change of the peripheral temperature of the optical source.
Dependencies are inferred from the claim text.