For improvements in a lamp type recognition scheme

Details For improvements in a lamp type recognition scheme For improvements in a lamp type recognition scheme

1998-07-29

2000-12-12

Vu, David H.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315308, 315DIG5, H05B 3702

Patent

active

061603619

ABSTRACT:
A ballast for operating different types of lamp loads through identification of the lamp type during steady state operation of the lamp load. Lamp type recognition is achieved based on a comparison of the lamp load voltage and lamp load current data points stored in a random-access memory of a microprocessor to a plurality of V-I characteristic curves stored in a read-only memory of the microprocessor. Through this comparison, the ballast can distinguish among a number of different lamp loads having the same starting voltage.

REFERENCES:
patent: 5039921 (1991-08-01), Kakitani
patent: 5212428 (1993-05-01), Sasaki et al.
"An integrated ditigal control for electronic lighting", WESCON/97, Conference Proceedings (Cat. No. 97CH36148), Santa Clara, CA, USA Nov. 4-6 1997, Abstract.

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