System and method for reducing flicker of compact gas...

Details System and method for reducing flicker of compact gas... System and method for reducing flicker of compact gas...

2006-06-13

2006-06-13

Vu, David (Department: 2828)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S308000, C315SDIG004

Reexamination Certificate

active

07061191

ABSTRACT:
A lamp lighting system allows dimming of a compact gas discharge lamp to a low light output level without perceptible flicker. When the system receives a request to dim the lamp to the low level, the lamp is operated at an intermediate output level prior to operating the lamp is then requested low level. When the lamp cools to below a threshold temperature, the lamp is then operated at the requested low level. In one embodiment, the lamp is dimmed from its full rated output level to 1% of its full rated output level. The intermediate level is approximately 2% to 5% of this full rated level. No flicker is perceived when the lamp level is reduced from the full rated level to the low level. Upon cooling, no flicker and no change in output level are perceived when the lamp is subsequently reduced from the intermediate level to the low level.

REFERENCES:
patent: 5041763 (1991-08-01), Sullivan et al.
patent: 5041763 (1996-06-01), Sullivan et al.
patent: 5757142 (1998-05-01), Kong
patent: 5841239 (1998-11-01), Sullivan et al.
patent: 5864212 (1999-01-01), Sullivan
patent: 6111368 (2000-08-01), Luchaco
patent: 6225760 (2001-05-01), Moan

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