Electric lamp and discharge devices: systems – Discharge device load – Plural gases or vapors in the discharge device
Patent
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
Dinh Son
LaRoche Eugene R.
Matsushita Electric & Works Ltd.
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