1961 hand held color tv?

[Electronic M]

If that flat screen two color CRT actually worked then it mat have been possible to make a three color tube by adding another layer to it.

[old_tv_nut]

Originally Posted by Electronic M

If that flat screen two color CRT actually worked then it mat have been possible to make a three color tube by adding another layer to it.

I don't see how. The glass that carries the phosphors has only two sides, and the idea is to have two beams approaching the opposite sides through vacuum.

[Electronic M]

Originally Posted by old_tv_nut

I don't see how. The glass that carries the phosphors has only two sides, and the idea is to have two beams approaching the opposite sides through vacuum.

Use one more screen with it's own deflection, and make one of the two screens semi-transparent so the two screens can be watched at the same time adding the primaries of each to make a tricolor image.

The two color one already had a semi-transparent screen so one could probably add another tube behind it with a third phosphor color to get full color with out any major modification.

Heck one could probably double up two bi-color tubes one having two primaries and the other having the third primary plus a white monochrome phosphor for improved brightness/simplified circuits.