Drive device for a light-emitting component

Details Drive device for a light-emitting component Drive device for a light-emitting component

2005-04-26

2005-04-26

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

Photometers

Photoelectric

C327S029000, C250S221000, C250S205000, C330S253000

Reexamination Certificate

active

06885443

ABSTRACT:
A drive device for a light emitting component includes a reference source for generating a power stipulation signal that stipulates a desired power. A correction device compensates for a temperature-dictated measurement error of the photodetector by modifying, in a temperature-dependent manner, the power stipulation signal generated by the reference source. A regulating device is connected to the reference source and generates a regulating signal that regulates the light power of the light emitting component to minimize the deviation between the actual light power and the desired light power. This configuration avoids monitor tracking errors of a monitor diode used to measure the actual light power.

REFERENCES:
patent: 4071886 (1978-01-01), Eicher
patent: 4812642 (1989-03-01), Hasegawa et al.
patent: 6044095 (2000-03-01), Asano et al.
patent: 6456141 (2002-09-01), Nishizono et al.
patent: 6670773 (2003-12-01), Nakamura et al.

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