Digital convergence of multiple image projectors

Details Digital convergence of multiple image projectors Digital convergence of multiple image projectors

1974-09-23

1976-03-09

Richardson, Robert L.

Telegraphy

Systems

Simplex-reversing periodic

178 75D, 178 65, 178 77, 358 60, 315368, H04N 574, H04N 928, H04N 958

Patent

active

039432793

ABSTRACT:
In a scanned multiple image display device a plurality of individual projectors produces a single composite image by optically combining individual projector outputs. The individual images must be converged with each other to produce an acceptable display. A digital computer is used to generate and store words that correspond to the required convergence correction for individual projectors. The stored words are read out of the computer in accordance with projector scanning timing and, after being converted to analog form, are used to correct the scanning to produce convergence.

REFERENCES:
patent: 2654854 (1953-10-01), Seright
patent: 2989584 (1961-06-01), Mengle
patent: 3115544 (1963-12-01), Marley
patent: 3648097 (1972-03-01), Merryman
patent: 3714496 (1973-01-01), Horvath
patent: 3740608 (1973-06-01), Manber et al.

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