Display apparatus for a drum

Details Display apparatus for a drum Display apparatus for a drum

1980-07-07

1982-10-05

Dixon, Harold A.

Electric lamp and discharge devices: systems

With load device temperature modifier

Plural load device systems

84464R, 315 76, 315112, 34081517, H01K 700, H01J 724

Patent

active

043530087

ABSTRACT:
A display apparatus is provided which is responsive to an audio signal to vary the illumination of a light source. The light source has a variable resistance having an initial value when the light source is cold and a larger value when the light source is warm. The display apparatus includes a circuit having a pulse generator which periodically passes pulses of current through the light source to warm the light source prior to illumination of the light source by the modulator sufficient to substantially increase the response time of the light source upon receipt of the audio signal.

REFERENCES:
patent: D163538 (1949-05-01), Orta
patent: 1044950 (1912-10-01), Uptegraff
patent: 3228278 (1966-01-01), Wortman
patent: 3324755 (1967-06-01), Canonico
patent: 3500126 (1970-03-01), Ford
patent: 3550497 (1970-12-01), Marsh
patent: 3635121 (1972-01-01), Knauff
patent: 3719857 (1973-03-01), Sharp
patent: 3798638 (1974-03-01), Goldschmied
patent: 3958113 (1976-05-01), Termohlen
patent: 4091706 (1978-05-01), Ludwig
patent: 4216464 (1980-08-01), Terry

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