Light source device, projector device, monitor device, and...

Details Light source device, projector device, monitor device, and... Light source device, projector device, monitor device, and...

2011-01-11

2011-01-11

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular temperature control

C372S029021, C372S033000

Reexamination Certificate

active

07869476

ABSTRACT:
The controller170controls the output power of the semiconductor laser device100adepending on the temperature of the semiconductor laser device100aacquired by the temperature sensor130. The controller170references the correspondence table510when the sensor temperature Ts is obtained, obtains the output power PWs corresponding to the sensor temperature Ts, and controls the power supply driving circuit150aso that the output power per unit time of the semiconductor laser device100awill be the output power PWs. Thus increase in temperature of the semiconductor laser device is able to be prevented through reducing the output power by controlling the amount of power supplied to the semiconductor laser device. As a result, it is possible to prevent reductions in the service life of the semiconductor laser device, even when there is a failure in a cooling device that cools the semiconductor laser device, and even when the device is used in a high temperature environment not envisioned at the time of manufacturing.

REFERENCES:
patent: 2006/0165140 (2006-07-01), Tan et al.
patent: A-05-313115 (1993-11-01), None
patent: A-2005-189323 (2005-07-01), None
patent: A-2006-091132 (2006-04-01), None

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