LED drive circuit

Details LED drive circuit LED drive circuit

2005-12-27

2005-12-27

Nguyen, Jimmy H. (Department: 2673)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S102000, C345S046000

Reexamination Certificate

active

06980181

ABSTRACT:
An LED drive circuit having reduced power consumption has a constant current generating circuit for driving a plurality of LEDs and at least one switch connected to a respective LED for periodically turning on and off the respective LED at a rate higher than a visual perception rate to reduce power consumption.

REFERENCES:
patent: 4967192 (1990-10-01), Hirane et al.
patent: 5061861 (1991-10-01), Sameshima et al.
patent: 6400349 (2002-06-01), Nagumo
patent: 6466188 (2002-10-01), Cato
patent: 6486726 (2002-11-01), Worley et al.
patent: 6628252 (2003-09-01), Hoshino et al.

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