NEC 2690WUXi - can it handle regular sRGB?

Started Oct 1, 2007 | Discussions thread
Will49 Regular Member • Posts: 225
Re: Calibration to sRGB in aRGB mode possible?

There are so many incorrect items in this post I'm not really sure where to begin.

First I would recommend you read the following white paper. While it is intended to be about an LED monitor, the wide gamut explanations are valid for other monitors such as the LCD2690.

http://www.necdisplay.com/cms/documents/TechnologyPapers/LCD2180WG-LEDTechPaper_121605.pdf

Graystar wrote:

Yes, you’re missing something. You’re missing the spec, which says
the monitor is limited to a palette of 16.7 million colors at one
time.

"Internal 12-bit Look Up Tables (LUTs) allows the display of 16.7
million colors out of a palette of 69 billion"

“93% Adobe RGB coverage” refers solely to the range of colors that
can be potentially displayed. That has nothing to do with the
implementation of the Adobe RGB standard in any form within the
monitor.

Totally incorrect. The gamut size has nothing to do with the "bit depth" or LUTs in the monitor.

A 16.7 million color limitation makes the monitor an 8-bit
monitor.

No it doesn't. Using this logic, then there is no such thing as a > 8 bit consumer monitor because currently the maximum bit depth output from a Mac or PC is 8 bits per color per pixel. It's what you do to those 8 bits inside the monitor that makes it a > 8 bit monitor - but again, that has nothing to do with the gamut.

Review of the spec and features show that only sRGB is
built into the monitor, which would be in line with the 8-bit
display.

Again the bit depth has nothing to do with the monitor gamut being sRGB or ARGB. You could make a 4 or 16 bit monitor with ARGB coverage.

So you’re either in sRGB mode or you’re not (exactly like
high end CRTs.) That makes it an sRGB monitor. Which is really all
it can be, because unless you have a special video card designed to
output 10 bit color, all regular video cards expect to connect to
sRGB devices.

Again totally incorrect. The video card has absolutely nothing to do with the gamut of the monitor. Video cards don't "expect" to be connected to any specific gamut of monitor.

Current operating systems (Mac OS and Windows), applications (i.e. Photoshop) color management systems (ColorSync etc), graphics cards and digital video interfaces are currently limited to rendering 8 bit color to the display.

High end CRTs were able to surpass the sRGB color space, and as
analog devices could display billions of colors.

No. Bit depth doesn't increase color gamut. High end CRTs were not able to surpass sRGB because they were analog. It has nothing to do with being analog or digital. There was only one commercially available wide gamut CRT display and that was sold by NEC/Mitsubishi about 5-6 years ago and cost about $5000.

This is no
different. Having such a color range and 12-bit LUTs makes it easier
to get the 16.7 million colors that matter to you. If that happens
to be the colors that perfectly match sRGB, then that’s what you use.

If you want to create a palette that matches your printer to get a
better match to output, then you use that instead. Or maybe you want
to create a palette that matched your camera to get a better idea of
what you’re capturing. You can do that as well.

This is incorrect on so many different levels. You don't create a monitor palette to match your output, or anything else.

But no matter what, you’re always limited to 16.7 million colors, and
color management always sees the monitor as an sRGB device.

Incorrect.

I don't know who came up with the idea that a device designed to be
calibrated to any desired color set could somehow not be calibrated
to a specific set of colors that is clearly within its range...but I
would take further advice from such person with a grain of salt.

I would recommend taking some time to learn the basics of color gamuts, color transforms, color calibration and color management.

Getting a wide gamut monitor to emulate an sRGB monitor in terms of gamut can not be done by calibration alone. There are sophisticated 3D gamut mapping transforms that need to be done. Sure you can calibrate the white point and gamma, but that does absolutely nothing to the color gamut which is the major issue that is being discussed here.

-- hide signature --

Will Hollingworth
Manager of OEM Product Design & Development Engineering
NEC Display Solutions of America, Inc.

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