Planar light source

Details Planar light source Planar light source

1990-02-15

1991-09-03

Yusko, Donald J.

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

H01J 2900

Patent

active

050457543

ABSTRACT:
A planar light source, comprises a vacuum enclosure (1) bounded by two parallel, insulating planar walls (3,4) and a side wall (2). On each of the planar walls and within the enclosure (1) is placed a conductive electrode (5,6) covered with an insulating layer (7,8) and at least one of these two wall-electrode-insulating layer assemblies is transparent. On one of the insulating layers (8) is placed a cathodoluminescent material layer (9). In the vicinity of the side wall (2) and externally of the two conductive electrodes (5,6) is provided an electron source (11) and a voltage source (10) is also provided for alternatively applying to the two conductive electrodes (5,6) two different potentials (V.sub.anode, V.sub.rest), so that the electrons emitted by the electron source are alternatively collected by the electrodes.

REFERENCES:
patent: 4126384 (1978-11-01), Goodman et al.
patent: 4274028 (1981-06-01), Frame
patent: 4377769 (1983-03-01), Beatty et al.
patent: 4429303 (1984-01-01), Aboelfotoh
patent: 4580877 (1986-04-01), Washo
patent: 4772885 (1988-09-01), Uehara et al.

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