Driving circuit for light emitting diode

Details Driving circuit for light emitting diode Driving circuit for light emitting diode

2006-11-28

2006-11-28

Le, Hoanganh (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S307000, C315S308000

Reexamination Certificate

active

07141936

ABSTRACT:
A driving circuit for a light emitting diode may include two transistors and an operational amplifier. The operational amplifier may act to cause the output voltages of the drain terminals of the transistors to be substantially equal, making the light emitting diode forward current substantially equal to the reference current. This current may provide a steady drive current, even when the supply voltage varies over a wide range.

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