2-CRT type projection apparatus including a red/green CRT and a

Television – Video display – Projection device

Patent

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Details

348776, H04N 931

Patent

active

054206480

ABSTRACT:
A 2-CRT type projection apparatus having a green and blue two-color cathode ray tube and a green and red two-color cathode ray tube and producing a projected picture of high resolution and brightness. The green phosphor of one of the two-color cathode ray tubes is a phosphor which emits green light of high brightness and the green phosphor of the other cathode ray tube is a phosphor which emits green light extending a color reproduction range. Further, stripe directions of the two-color cathode ray tubes are substantially perpendicular to each other.

REFERENCES:
patent: 4300157 (1981-11-01), Midland
patent: 4410841 (1983-10-01), Dusard et al.
patent: 5196761 (1993-03-01), Majima et al.

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