Re: RGB LED Backlight
Re: RGB LED Backlight
- Subject: Re: RGB LED Backlight
- From: Richard Wagner <email@hidden>
- Date: Mon, 3 Nov 2008 07:50:26 -0700
On Nov 3, 2008, "edmund ronald" <email@hidden> wrote:
My experience so far in my repeated attempts to get a working sample
of the HP LP2480ZX Dreamcolor display leaves me less than optimistic
about RGB LED technology, for pro rather than consumer usage.
That does not leave me optimistic. I am expecting a replacement
panel for my LP2480zx this morning. Same problem - non-uniformity
across the display. In my case, magenta cast on the right, green on
the left, and significant falloff in the bottom left corner. Not
usable for color correction., but perhaps ok for watching movies... :-(
The interesting question is what the failure and aging modes of the
various RGB backlight displays are.
- White LED backlight displays should evidence luminance
non-uniformity or gradients. This is tolerable if the zoning is
restrained.
- RGB backlight displays, from what I've seen so far, display local
color hue changes and tints when degraded. This is hard to live with.
I agree - and I'm also concerned about aging. Even if I get a good
panel from HP, how long will it last? It is otherwise a spectacular
display. This seems to be the Achilles heel of this technology...
but non-uniformity is a show-stopper for color correction of still
images.
As we all know, the perfect display does not exist. My Eizo CG210 has
visible non-uniformities in the edge areas but is still a superb
monitor. However there are acceptable faults and annoying ones. I can
only hope that RGB Led technology will prove -in the future- to have
acceptatble faults.
I also have an Eizo CG210, and I have to really look hard to find any
imperfections. The two monitors are miles apart - both in gamut, and
in faults. IF I can get a good sample, it will be an excellent
monitor to work with.
One other small gripe. The monitor hood (sold separately $$$) is all
black plastic and produces an annoying reflection on the top (but not
the sides). I plan to purchase black felt to apply to it with spay
adhesive. My Eizo hood came with integrated black felt and it works
well. The hood is otherwise well designed, but very overpriced.
I'm also still waiting for the HP colorimeter and software - due to
ship Nov 7, or so they say. Thus far, I have not even been able to
calibrate / profile the monitor. It is really inexcusable that HP
sold / shipped monitors without the ability for the user to calibrate
and profile them. It's sort of like buying a very nice car and
discovering that it shipped without a speedometer, and the
speedometer will cost you an extra $350, and will be available in a
month. The SONY Artisan shipped with a custom colorimeter and
software. The Eizo's ship with custom software and can use multiple
existing devices. Both also included a hood.
--Rich Wagner
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