Re: A metameric match between display and print? [was: CMY Display coming?]
Re: A metameric match between display and print? [was: CMY Display coming?]
- Subject: Re: A metameric match between display and print? [was: CMY Display coming?]
- From: Ernst Dinkla <email@hidden>
- Date: Tue, 11 May 2010 11:32:12 +0200
Graeme Gill schreef:
Ernst Dinkla wrote:
substantially hidden from view. I find that a very optimistic
statement. With transmissive screens they may get away with that but
in reflective screens it doesn't work that way. It would be worse with
a CMY+K reflective screen.
Don't you mean the other way around ? With transmissive screens there
is nowhere to hide the reservoir, since light has to be transmitted
though it. The multiple surfaces of the reservoir also creates extra
boundaries for light reflection/dispersion. For a reflective display,
the reservoir can be hidden behind the reflective surface. The limit
is then the hole size, not the reservoir size. This works best for
monochrome though - doing multiple layers still seems a very difficult
prospect.
Graeme Gill.
With monochrome screens your approach would give reflective displays an
advantage, the reservoir could be hidden behind the reflective backfoil.
But I had multiple layers CMY(+K) in mind and I doubt anything like that
can be done on reflective screens then. Even when the (transparant)
reservoirs are hiding one another a 5-10% dot makes the display no
longer a true white like a similar dot on paper would affect the paper
white. If the dispersed Cyan colorant is spread over the pixel area at
100% Cyan it has to have enough C filtering to equal a 100% Cyan paper
print. When contracted to the reservoir the layer density will increase
20x, in practice no longer transparant so near a black dot. Say the
opposite of black generation :-) It would be logical to put yellow up
front then and the rest behind but a 5% dark magenta dot shimmering
through a 100% yellow area would not be nice either. Make the reservoir
hole closed up front with a reflective layer and it will influence the
black level in a reflective screen. On transmissive screens the
illumination level can blow out an area of 5% black on white I would
think, grids in RGB CRTs alike..
The software/separation compensations for CMY hues as used in offset are
not identical to what is needed here. Not only because the subtractive
mixing is more continuous and progresses differently but the reservoirs
should be compensated too.
Liquavista is located a mile from where I live but that doesn't mean I
can see their CMY display. Very intrigued how they solve this all.
--
Met vriendelijke groeten, Ernst
Try: http://groups.yahoo.com/group/Wide_Inkjet_Printers/
| Dinkla Grafische Techniek |
| www.pigment-print.com |
| ( unvollendet ) |
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