Gas discharge lamps and systems

Details Gas discharge lamps and systems Gas discharge lamps and systems

H - Electricity

01

J

H01J 61/30 (2006.01) H01J 65/04 (2006.01) H05B 41/392 (2006.01)

Patent

CA 2261248

Known flat panel lamps have internal walls forming a serpentine discharge path between two internal electrodes. In the present invention two glow mode electrodes in the form of interdigitated combs are laid on the outside of the front panel of the lamp, on top of the walls. The internal electrodes are connected to a first drive circuit; the glow mode electrodes are connected to a second drive circuit, which drives them at a frequency of about MHz. At high brightness, only the internal electrodes are operative; at low brightness, only the glow mode electrodes are operative; and at intermediate brightness the two sets of electrodes are alternately energized.

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