Feedback circuit for a display sign and method

Details Feedback circuit for a display sign and method Feedback circuit for a display sign and method

2005-11-15

2009-10-13

Pham, Toan N (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S661000, C340S815450, C315S129000, C324S076790, C362S812000

Reexamination Certificate

active

07602305

ABSTRACT:
A feedback circuit for a display sign has a number of lights. A resistor is coupled in series with the lights. A voltage measuring circuit is coupled to the resistor.

REFERENCES:
patent: 5739639 (1998-04-01), Johnson
patent: 6320330 (2001-11-01), Haavisto et al.
patent: 6433488 (2002-08-01), Bu
patent: 7122971 (2006-10-01), Yeh et al.
patent: 7224128 (2007-05-01), Hsu
patent: 7358681 (2008-04-01), Robinson et al.

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