18 Oct
2008
18 Oct
'08
12:55 p.m.
On Fri, 17 Oct 2008, Tony Duell wrote:
Sure, and actually, thay applies to delta-gun shadowmask CRTs too. You
had to converge those in the place where the set was going to be used [1].
But I was sepcifically asking about a vector displaym biot a raster one.
A vector display using 3 monochrome CRTs optically combined would not
have the resolution limit imposed by the shadowmask.
[1] The coming of the in-line gun CRT firstly allowed for portable
colour TVs, and secondly meant the colour TVs could be sold by what are
known in the UK as 'box shifters' -- shops with almost no knowledge of
their products, they just sell you the unit. Before that, a colour TV had
to be set up in the customers house, something that few people did
themselves.
-tony
Did anyone try using 3 monochrome CRTs and
combining the outputs
optically (e.g. by back projectuion)? That would get round the need for a
shadowmask
In the 1970s, there were some projection TVs that had three CRTs.
Convergence/alignment needed to be adjusted any time the set was moved.