Variable color lighting device

Details Variable color lighting device Variable color lighting device

1989-06-22

1991-02-26

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Discharge device load

Plural gases or vapors in the discharge device

315 48, 313493, 313622, 313487, H01J 1736

Patent

active

049964658

ABSTRACT:
A variable color lighting device employs two gases having different ionization potentials and sealed in a lamp tube. A cathode and anode are disposed inside the lamp tube opposed to each other and connected to a power supply source for varying applied voltages thereto to vary light emitting ratio of the two gases for different color light generation, in accordance with the applied voltages. A variable color lighting can be realized at relatively low voltages with a simple and economical control circuit, and an increased light emission output can be attained to render the device utilizable as a main lighting source.

REFERENCES:
patent: 1827705 (1931-10-01), Claude et al.
patent: 2135283 (1938-11-01), Found
patent: 2740914 (1952-07-01), Bowtell et al.
patent: 3875453 (1975-04-01), Thornton, Jr.
patent: 4740729 (1988-04-01), Chow

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