Hardware modeling of LED relative brightness

Details Hardware modeling of LED relative brightness Hardware modeling of LED relative brightness

2005-11-29

2005-11-29

Homere, Jean R. (Department: 2128)

Data processing: structural design, modeling, simulation, and em

Modeling by mathematical expression

C703S013000, C703S014000, C700S030000, C700S031000, C702S001000, C702S040000

Reexamination Certificate

active

06970811

ABSTRACT:
Via simple electronic circuitry, an analog voltage that tracks the LED light output is produced. This analog voltage is read by an A/D converter to ascertain an approximate relative light output of the LED so that light output compensation can be quickly calculated. A resistor-capacitor circuit is used to approximate the behavior of the LED light output. The output voltage from this circuit is sampled and used along with a sensed ambient temperature to adjust the exposure time of an image capture system.

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