Electric lamp and discharge devices: systems – Plural load device systems – Plural discharge device loads
Patent
1983-11-15
1985-12-17
Moore, David K.
Electric lamp and discharge devices: systems
Plural load device systems
Plural discharge device loads
3151694, 315363, 340766, 340772, H05B 4138, H05B 4139
Patent
active
045594805
ABSTRACT:
This light emitting element (24) constitutes a pixel a plurality of which when arranged in rows and columns may form a matrix display board.
The element comprises one or more discharge tubes (10, 11, 12). For a board displaying images (textual or video) in color the internal wall of each tube is coated with a fluorescent substance which responds respectively to the red, green and blue portions of the spectrum. By independently varying the intensity of the light emitted by each tube light is obtained at the element output the resultant wavelength of which may extend over the entire visible spectrum.
The invention finds use in a display board employed to convey information to crowds of people as for example in a sports stadium.
REFERENCES:
patent: 2015885 (1935-10-01), Dallenbach
patent: 4071809 (1978-01-01), Weiss et al.
patent: 4208618 (1980-06-01), Heine
patent: 4283659 (1981-08-01), Beckerman et al.
patent: 4326150 (1982-04-01), Kobayashi
patent: 4347460 (1982-08-01), Latassa et al.
patent: 4368485 (1983-01-01), Midland
patent: 4486749 (1984-12-01), Kishino et al.
DeLuca Vincent
Moore David K.
Omega SA
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