The invention provides a GaN green LED drive device comprising: a bias current
output unit for outputting a pulse-like bias current having a low level higher
by a predetermined value than a zero level; and a peaking unit for peaking the
bias current outputted from the bias current output unit to make rise of the bias
current higher than a high level and make fall of the bias current lower than the
low level to thereby obtain a peaked bias current supplied to a GaN green LED.
The bias current is peaked while the low level of the bias current is set at a
higher value (10 mA) than that in the related art. Hence, the fall time tf
becomes 6.6 nsec. The fall time tf can be shortened greatly compared
with that in the related art.
