Three-dimensional display devices

Details Three-dimensional display devices Three-dimensional display devices

1975-12-04

1977-12-13

Curtis, Marshall M.

Communications: electrical

Systems

Portable self-contained

250458, 250483, 313461, G06F 314

Patent

active

040632334

ABSTRACT:
Three-dimensional images are produced within a transparent cathode-ray tube by directing a plurality of electron beams into a cloud of phosphorescent particles and causing the beams to intersect at a point within the cloud. Each individual beam's current is maintained at less than the threshold of luminescence of the particles but the combined currents may be caused to exceed that threshold by a controlled amount thereby producing light spots of variable brightness at the beam intersection point, which point may be directed into any part of the volume of the cloud. The particle cloud is produced by a high-gradient electric field pump. Use of the pump for particle cloud production in such applications as beam testing is also described.

REFERENCES:
patent: 2402758 (1946-06-01), Leverenz
patent: 2604607 (1952-07-01), Howell

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