dennis@home wrote:


"The Natural Philosopher" wrote in message
...
Andy Champ wrote:
The Natural Philosopher wrote:

Color transparencies which are used in pro film applications say
your are a liar.

Not really. Transparencies subtract some colours from the
transmitted light; prints subtract some from the reflected light.
Displays make their own...


Ah, so that is why they are backlit then?

So they can 'make their own?
What a prat. An LCD display IS a color transparency.

No it is not!

A transparency is a subtractive process.
An lcd is additive.

Think again.


Each pixel in a film transparency has three filter layers each of which
can absorb a colour.


I've not heard of pixels with respect to film before. Make it up as we
go along?

Each pixel on an lcd is made from three different colour subpixels.
The subpixels each have a colour filter behind them to make them RGorB.

Which amounts to the same thing in practice.

50% on two colors and 0 on another in film = LCD primary.

As far as the eye is concerned. The issue being that the colours in all
cases are relatively broad spectrum colours. You cant get monochromatic
colour with either system if you want overall balance. You are not
mixing pure red, pure blue and pure green any more than you are notching
out everything BUT pure magenta pure cyan or pure yellow..





Andy