Just as temperature sensing can be used in a control loop to keep the LED temperature constant, a light sensor can be used to keep the light output of the LED constant.
Source: EEweb Articles
Link: Brightness Compensation
Just as temperature sensing can be used in a control loop to keep the LED temperature constant, a light sensor can be used to keep the light output of the LED constant.
Source: EEweb Articles
Link: Brightness Compensation