Transition illumination lamp

Details Transition illumination lamp Transition illumination lamp

1990-11-13

1992-01-21

Lazarus, Ira S.

Illumination

Modifier mountable on light source envelope

143293, 143351, F21V 910

Patent

active

050832514

ABSTRACT:
A transition illumination lamp device comprising a light source which produces light and heat, and a thermochromic layer positioned with respect to the light source to control the quantity of light transmitted from the device as a function of the temperature and time of the thermochromic layer, such temperature being a function of the heat produced by the light source and the transition temperature of the thermochromic layer.

REFERENCES:
patent: 3256518 (1966-06-01), Crane
patent: 3470049 (1969-09-01), Reusch
patent: 3584934 (1971-06-01), French
patent: 3642280 (1972-03-01), Jacobs
patent: 4772506 (1988-09-01), Siol et al.
patent: 4832466 (1988-05-01), Nishimura et al.
patent: 4954937 (1990-09-01), Kobayashi et al.

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