Temperature compensating method and apparatus for an optical disc device
AssigneeQuanta Storage Inc.
InventorsShih-Jung Huang, Shang-Hao Chen
Life of this patent
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Abstract
A temperature compensating method and apparatus uses a front sensor to measure a first power of a light-emitting unit emitting a light, and a thermal sensor to measure the temperature of the light-emitting unit. The temperature is inputted into an I/O unit to figure out a second power from the equations of the temperature and power. Then, the first and second powers are inputted into a controller to adjust the power of the light-emitting unit, or the second powers are inputted into a write strategy to change an output clock to adjust the energy of the light without changing the power of the light-emitting unit. The optical disc device has the effect of the temperature compensation.
Claims19
A temperature compensating method for an optical disc, comprising the steps of:
- discriminating a kind of dyes on the optical disk;
- searching an equation corresponding to the kind of dyes on the optical disk;
- storing the equation in an I/O unit;
- measuring a first power of a light-emitting unit emitting a light;
- measuring a temperature of the light-emitting unit;
- inputting the temperature into an I/O unit;
- figuring out a second power relative to the temperature with the equation;
- inputting the first power and the second power into a first control unit;
- checking a difference between the first power and the second power to change an output pattern of signals;
- and
- controlling a driver unit with the output pattern of signals to determine an output power of the light-emitting unit by means of a second control unit.
A temperature compensating apparatus for an optical disc, comprising:
- a light-emitting unit;
- a front sensor disposed by the light-emitting unit to measure a first power of light-emitting unit;
- a thermal sensor unit disposed by the light-emitting unit to measure a temperature of light-emitting unit;
- a memory to store a plurality of equations;
- an I/O unit coupled to the thermal sensor unit to receive the temperature and output a second power;
- a microprocessor for searching an equation corresponding to a kind of dyes on the optical disk stored in the memory, and storing the equation in the I/O unit;
- a first control unit coupled to the front sensor to receive the first power transmitted from the first sensor;
- a second control unit coupled to the I/O unit to receive the second power transmitted from the I/O unit and determine an output pattern with the equation;
- a third control unit receiving the output of the second control unit;
- and
- a driver unit coupled to the third control unit to drive the light-emitting unit.
Dependencies are inferred from the claim text.