Method for driving light emitting diode

Details Method for driving light emitting diode Method for driving light emitting diode

2006-01-03

2006-01-03

Philogene, Haissa (Department: 2828)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S291000, C315S169100, C345S046000, C345S212000, C323S315000

Reexamination Certificate

active

06982527

ABSTRACT:
A method for driving a light emitting diode coupled to an output of a current mirror is provided. The method includes providing a control terminal voltage of the current mirror as a reference voltage, increasing a voltage of an input of the current mirror and providing an input of the light emitting diode as a voltage feedback point for keeping a constant voltage difference between the input and the output of the current mirror, and driving the light emitting diode by a voltage at the output of the current mirror.

REFERENCES:
patent: 5701133 (1997-12-01), Miller et al.
patent: 6044095 (2000-03-01), Asano et al.
patent: 6255868 (2001-07-01), Yasuda
patent: 6897709 (2005-05-01), Henry
patent: 6897717 (2005-05-01), Eddleman et al.
patent: 2002-237745 (1998-09-01), None
patent: 10-242522 (2002-08-01), None

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