FET current regulation of LEDs

Details FET current regulation of LEDs FET current regulation of LEDs

2005-08-23

2005-08-23

Nguyen, Matthew V. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C315S294000

Reexamination Certificate

active

06933707

ABSTRACT:
Field Effect Transistors (FETs) are used to regulate current in a light emitting diode (LED). FETs are fundamentally voltage driven devices, where output current is governed by junction voltage. Since junction voltage can be controlled with little or no support circuitry, FETs present a solution to current regulation where cost, complexity, and perhaps even size are important.

REFERENCES:
patent: 5459478 (1995-10-01), Bolger et al.
patent: 6057651 (2000-05-01), Usami
patent: 6392358 (2002-05-01), Runau et al.
patent: 6748180 (2004-06-01), Feng

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