Dave Plowman (News) wrote:
In article ,
Andy Champ wrote:
So they can 'make their own?
What a prat. An LCD display IS a color transparency.

Dear me. Got out of bed the wrong side today? You do seem to be
getting a little impolite lately! Anyway...

It's not a bad analogy.

Unlike a slide (usually shown with a halogen lamp) or a print (usually
shown under whatever ambient light is about) most LCD displays have a
backlight specially chosen by the manufacturer to meet some compromise
of (good colour, cheap, low power, probably something else I can't think
of) when operating with the particular LCD filters in front of them.

LCD backlights are usually chosen to have a pretty good spectral response.

A slide has a pretty good match to the colours of the real scene. It
has to, because the slide manufacturer didn't make the projector.

But then different makes of transparencies give different results...

And transparencies are usually used for top quality magazine prints not
'projected onto a screen' anyway.


There's no such requirement for a display - it's the light emitted by
the entire combination of backlight and filters that matters.

How about LCD projectors?