Re: Mitsubishi Profiling Woes
Re: Mitsubishi Profiling Woes
- Subject: Re: Mitsubishi Profiling Woes
- From: Doug Brightwell <email@hidden>
- Date: Fri, 23 Mar 2001 12:33:08 -0800
William...
Thanks for your note. Just to clarify...
>
You stated that the 2040 looked to have less contrast (indicating a higher
>
black level, and/or a lower gamma set in the LUTs), but yet in Optical you
>
can't match the luminance. I think this is where the problem lies. Do NOT
>
use the brightness control to try and match the "luminance" levels of
>
white. Use the brightness control only to match the black level. Once that
>
is set, DO NOT adjust brightness again. If the luminance level of white is
>
still not high enough, then use the Contrast control, or failing that,
>
increase the RGB gains slightly (at the same time try to maintain the
>
correct white point - use the Optical Colorimeter tool if necessary).
>
>
You also stated that your target luminance is around 112. If you are using
>
a white point of D50 or D65, then you can't achieve this kind of level for
>
very long. It is way way too high, especially for a 22" monitor. Typically
>
you should use a luminance level of around 80-85 cd/m^2.
I normally run the luminance level around the level you recommended. I only
cranked it up this time in order to try to match the black (not white) level
in Optical. Even with them cranked up, and with brightness at 100%, I still
couldn't match the black level. I didn't try to match the white level since
both contrast and brightness were already at 100%.
Also, I don't use the Optical startup app. I disabled it a long time ago at
someone's recommendation. So the monitors are set based upon what I set them
to in the monitors control panel. (Someone else on the list had commented
about that.)
I will give your other suggestions a try later today.
Is there anything I could have set incorrectly in the OSD that could be
causing this, other than the RGB levels in Pre-Cal?
After seeing a posting from Paul Guba at email@hidden, I thought I
should mention some other weird phenomena that might be relevant. Paul
wrote:
>
sort of misaligned image very noticable around text. I too thought it
>
may have been a cable problem but it proved not to be. Once I spoke
>
with someone at Mitsubishi they sent me a replacement with no questions
>
asked.
In my case:
- I occasionally, I see thin vertical black lines on the screen about the
same width as the two horizontal stabilizing wires. They come and go, and
seem to depend on the angle that the monitor is tilted.
- the image wiggled very slightly, more so with the BNC input but also with
the multi-pin input. I turned adjacent electronic devices on and off, trying
to see if there was some king of elecromagnetic interference. Nothing made
any difference. I finally banged the side of the cabinet and the wiggling
stopped.
- Once the wiggling stopped, the BNC image seemed to have a soft ghost image
around text in the Mac finder windows. Further banging on the cabinet made
the ghost image go away.
Odd... this is exactly the same technique my father used to repair the
family TV back in the 1950s! I guess tried and true methods never go out of
style. :-)
Do these oddities suggest anything that might explain the trouble I'm
having?
Thanks for your thoughts...
Doug
--
Doug Brightwell
email@hidden