Re: A metameric match between display and print?
Re: A metameric match between display and print?
- Subject: Re: A metameric match between display and print?
- From: Ernst Dinkla <email@hidden>
- Date: Wed, 12 May 2010 09:59:04 +0200
Ernst Dinkla wrote:
If chromogenic CMY photography has some analogy to CMY displays then
there should be enough contrast possible with just CMY in transmissive
light displays,
I thought we were talking about CMY filters that match a known CMY set of
INKS, not about a process analogous to that of chromogenic processes that
use CMY light sources. Weren't we? Or are we just talking as if the two
technologies were equivalent (which they seem to me not to be)?
it will be harder to achieve it with reflective light displays
But...there cannot be such a thing as a REFLECTIVE monitor display that is
self-luminous! It's either self-luminous (i.e., EMISSIVE) or not (i.e.,
REFLECTIVE). Which of the two?
The Amazon Kindle is a reflective display, since it has no self-luminous
qualities. But we don't expect these CMY monitors to act similarly to the
Kindle, do we?
Are you saying that we will have to shine a light at these CMY displays to
make them work? That would come as news to me.
yet the last could create the better metameric condition for
proof and softproof. At least for the CMYK press. For today's N-color
wide format inkjets I guess there's no gain in switching to CMY
displays. The electrowetting technology allows displays that can be both
transmissive and reflective at the same time
And remain self-luminous in either case?
Am I alone in feeling more than a bit puzzled by all this?
Marco Ugolini
Marco,
Do you expect a CMY(K) display that has the same screen build up of
offset prints, a range of dot sizes, more or less subtractrive color
mxing as a result? If so forget that idea and at the same time the
necessity of matching CMY hues. The systems used will be more like the
old roto gravure with continuous CMY density changes within the cell.
Closer to collotype and chromogene photography than offset.
I'm saying that with CMY subtractive filtering emissive displays,
reflective displays and mixed forms are possible.
If you consider an LCD panel with a backlight of fluorescent tubes or
LEDs as emissive then we have the same meaning of emissive in mind. I'm
not suggesting that the light source itself is colored and I do not know
a CMY display based on a principle like that. I didn't write self-luminous.
The refresh rate, resolution, grey scale, of existing E-books (Kindle
etc) has been too low for normal displays and that technology is very
limited for developments like discussed.
Here are some other display technologies discussed:
http://spectrum.ieee.org/computing/hardware/the-electronic-display-of-the-future/0
I'm referring to Liquavista and Gamma Dynamics technology, links in the
article.
Quote of the Liquavista home page:
>>Using the principle of Electrowetting, Liquavista is developing a
range of products based on a variety of architectures. Available in 3
distinct modes; transmissive, reflective and transflective, Liquavista’s
technology is the only solution, other than LCD, which operates in all 3
modes, but with 2x, 3x, 4x optical performance. Liquavista’s display
cell concepts allow radically brighter and more efficient flat panel
displays to be built – but use today’s established manufacturing
infrastructure and processes to achieve it.<<
There is a PDF at the Liquavista site explaining the technology more,
including the CMY possibilities.
--
Met vriendelijke groeten, Ernst
Try: http://tech.groups.yahoo.com/group/Wide_Inkjet_Printers/
| Dinkla Grafische Techniek |
| www.pigment-print.com |
| ( unvollendet ) |
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