From: Greg Langham (greg_at_psnet.net)
Date: Fri May 05 2000 - 17:25:21 EDT
I think you may be right. I know regular fluorescent lights can have
slightly different warmths to them even though they are supposed to be the
same. Also, you will find that these types of lights change color over
time.
I would say that the 770's we have here have yellowed somewhat over the past
year compared to when they were new. They have been used a lot so the
screens have been on for many hours.
Greg
-----Original Message-----
From: STeve Andre' [mailto:andres_at_msu.edu]
Sent: Friday, May 05, 2000 4:19 PM
To: THINKPAD_at_cs.utk.edu
Subject: RE: Different "color" TFT displays
Huh. Thanks for the data. So now I wonder if the flourscent display
behind the
units can differ somehow. Not knowing how that part is built, it seems
logical
that that would be the differing item--I wouldn't think the LCDs themselves
would have this variance?
--STeve Andre'
At 04:14 PM 5/5/00 -0500, Greg Langham wrote:
>Steve -
>
>I have noticed the same thing while having literally seven laptops on our
>config bench here side by side. Typically I find that the 14.1" IBM's are
>bluer, while the 13.7" IBM's are "mellower" like you describe.
>
>I just purchased two TP 600X's. What I noticed here was that one was
>somewhat "whiter" than the other - not necessarily brighter, just a whiter
>white. When you don't have them side by side, it's hard to see the
>difference.
>
>My guess is it has something to due with who manufactured the particular
TFT
>as well as the particular light they put in the unit.
>
>Greg
>
>-----Original Message-----
>From: STeve Andre' [mailto:andres_at_msu.edu]
>Sent: Friday, May 05, 2000 2:38 PM
>To: THINKPAD_at_cs.utk.edu
>Subject: Different "color" TFT displays
>
>
> A couple of weeks ago I got the screen on my i 1451 replaced due to
the
>pink screen
>problem. The new display is very nice, absolutely perfect pixels and such,
>but something
>has finally dawned on me just now, perhaps because I've been up about 28
>hours dealing
>with the love bug--
>
>That is, this i 1451's display now seems to be more blue than
>before. Putting my i 1480
>next to it, it seems more.... well I'm not sure quite how to say it:
>perhaps more mellow,
>meaning more red? I have problems/arguments with people about colors at
>times so
>its hard for me to describe this.
>
>Have folks noticed effects like this? I wonder how much variance there is
>between
>screens. Or perhaps, the size of the screen matters, or the kind of
>backlighting used?
>If anyone has any links to places that talk about the building of TFT
>displays I've love
>to read about them.
>
>Thanks, STeve Andre'
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