Methode und Apparat zur Steuerung des Emissionsspektrums einer Elektrolumineszensdiode

摘要

The emission wavelength of an LED (1) is controlled by measuring its ambient temperature (4) together with the applied current (2) and voltage (3). A processor (5) computes the actual emission wavelength from the measured values and stored data relating to the LED (1) and contrls (6) the power applied to the LED (1) in a feedback loop to bring the emission wavelength to a desired value.