Adaptive light emitting diode bar equalization

摘要

Uniformity of light output from an LED printbar (30) is achieved by current sensing or image sensing of auxiliary LEDs (44) on the LED printbar. A photodetector (46) measures the light output from the auxiliary LEDs and a comparator (48) will compare the auxiliary LED data to determine if the entire LED printbar has to be compensated to make the light output more uniform. <IMAGE>