LED matrix current control

Details LED matrix current control LED matrix current control

2007-06-19

2007-06-19

Wu, Daniel (Department: 2612)

Communications: electrical

Traffic control indicator

C340S815450

Reexamination Certificate

active

10823180

ABSTRACT:
A system is employed to provide a substantially constant intensity light source via functional circuitry, the functional circuitry comprises a switching power supply. At least one signal is part of a matrix of LEDs connected in series and parallel and configured for redundancy. A monitoring circuit comprises a current sense circuit, wherein the current sense circuit includes an amplifier and at least one resistor in series with the amplifier. The current sense circuit includes a power converter circuit that senses a current of a flyback diode, recovers a dc component of a waveform via a low pass filter, and provides feedback control of the at least one signal.

REFERENCES:
patent: 3921035 (1975-11-01), Holmes
patent: 3946364 (1976-03-01), Codomo et al.
patent: 6127784 (2000-10-01), Grossman et al.
patent: 6340870 (2002-01-01), Yamashita et al.
patent: 6400102 (2002-06-01), Ghanem
patent: 6614358 (2003-09-01), Hutchison et al.
patent: 6683419 (2004-01-01), Kriparos
patent: 6864641 (2005-03-01), Dygert
patent: 6958580 (2005-10-01), Kamoi et al.

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