Article about Chromatron Tube

[jr_tech]

I have read that Sony secured a license in 1962 and produced about 13,000 17 inch Chromatron sets, using vacuum tubes in 1964... It was a disaster! (would love to have one of those in my collection, however)
Later, much the same target/mask structure plus the inline gun structure from GE plus an innovative focus structure yielded the Trinitron, so I guess that the Chromatron design was not really a dead end.
jr