Re: LED displays: some comments and observations.
Re: LED displays: some comments and observations.
- Subject: Re: LED displays: some comments and observations.
- From: Klaus Karcher <email@hidden>
- Date: Tue, 18 Dec 2007 17:15:25 +0100
Roger Breton wrote:
I had the opportunity to use my EyeOnePro to measure the spectra of a
Samsung XL24 along with those of the Eizo CG301W and CG241W during GATF's
CMS Conference in Phoenix two weeks ago. For those interested, the files are
available for download here:
http://homepage.mac.com/graxx/FileSharing4.html
thanks :-)
I included spectrum images and spectrum data files exported from
BabelColor's CT&A and an Excel file that combine the three primaries and the
white plotted with Excel's default smoothing (Danny would object).
With hindsight, I realize I should have done those measurements a little
more carefully but I find them nevertheless useful for getting some idea of
what to expect from LED vs CCFL LCD technologies.
Seeing that both displays are advertised as "wide gamut", I am
disappointed: when I compare the primaries (and calculated secondaries)
with those of my CG210, I don't see any improvements in green or red --
only the gamut in the blue (and therefore also the cyan and magenta)
region seems to be larger -- but I ask myself how much of it will be
left when they are calibrated to D50.
On the other hand: when I compare EIZO's profiles for the CG241W using a
3D viewer like <http://iccviw.de>, its gamut looks /much/ bigger in the
green, red and cyan region.
I'm confused. Are you sure you measured the native primaries?
(I took the profiles for the XL20/XL24 from Samsung's Windows "drivers"
with a pinch of salt -- their gamut is tiny, it seems to me that they
are only valid for some kind of sRGB emulation mode ;-)
Klaus
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