Low pressure arc discharge light source unit

Details Low pressure arc discharge light source unit Low pressure arc discharge light source unit

1986-11-10

1988-05-10

Blum, Theodore M.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313610, H01J 162, H01J 6304

Patent

active

047437995

ABSTRACT:
In a low pressure arc discharge light source unit for unipolar or bipolar operation comprising a vacuum-tight glass envelope translucent at at least one side thereof, a rare fill gas and a quantity of mercury therein, a coating of fluorescent phosphor on the inner side of the envelope, and at least two electrodes opposed to each other within the envelope and connected to electrical conductors, the envelope is flat and essentially two-dimensional comprising two planar areas essentially parallel to each other at a small distance. The unit provides for better light output, better radiation efficacy and simpler and less costly manufacture, at the same time being most compact. At least 50% of the radiation of the planar area of the front of the envelope is effective. Means are provided allowing a single cathode to cooperate with a multiplicity of anodes in e.g., a pixel.

REFERENCES:
patent: 3508103 (1970-04-01), Young
patent: 3551736 (1970-12-01), Doehner
patent: 4594527 (1986-01-01), Genovese
patent: 4665341 (1987-05-01), Imamura et al.

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