Circuit apparatus for driving light emitting diode with low...

Details Circuit apparatus for driving light emitting diode with low... Circuit apparatus for driving light emitting diode with low...

2004-07-29

2008-10-28

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

Reexamination Certificate

active

07443368

ABSTRACT:
A circuit apparatus for driving a light emitting diode with a low voltage is disclosed. The circuit apparatus includes an NPN transistor, a PNP transistor, a capacitor connected to a base of the NPN transistor, a resistor connected to a contact point between the base of the NPN transistor and the capacitor and connected to the power, and an inductor connected to the power ground and a collector of the PNP transistor.

REFERENCES:
patent: 5930127 (1999-07-01), Iwahori et al.
patent: 6603342 (2003-08-01), Liao et al.
patent: 2004/0036418 (2004-02-01), Rooke et al.

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