CRT vs. LCD

[Peter Quain]

To: DMDX at psy1.psych.arizona.edu
From: "j.c.f." <jforster at psy1.psych.arizona.edu>
X-ASG-Orig-Subj: [DMDX] LCD display lag
Subject: [DMDX] LCD display lag
Reply-To: DMDX at psy1.psych.arizona.edu
Sender: DMDX-owner at psy1.psych.arizona.edu
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   Was reading AnandTech's Holiday 2008 Display Guide and ran across 
a worrying reference to lag in some panel types:

http://www.anandtech.com/guides/showdoc.aspx?i=3480

   The long and the short of it is that it appears that more 
expensive LCD panel technology appears to come with built in lag.  My 
guess is that this is probably because the panel massages the display 
data even when it's at the panel's native resolution as these are 
panels that designed for desktop publishers and small color 
deviations are noticed by those people.  I emailed the author to make 
sure he was using the native resolutions in his testing and he was so 
at this stage I would be avoiding the nicer PVA displays and instead 
sticking with the cheaper TN displays.



At 01:40 AM 5/03/2010, you wrote:
>I had a discussion yesterday with a collegue from another lab about
>display types. I am always using CRT displays for my experiments
>because they have higher refresh rates and no decay in which color
>values might differ from what you programmed.
>However, this guy was bringing forward an argument I have not thought
>about so far: For LCDs you have a stable overall picture at any given
>moment. A CRT display virtually draws one point after another, i.e.
>you never see an entire, let's say circle but your brain makes you see
>it as the point and lines are drawn so rapidly. I was shown photos
>made by a digital camera with really short shutter times (less than 5
>ms) and for CRT displays you can never see entire stimuli whereas for
>LCDs you do.
>
>So I was wondering what kind of display you are using in your labs and
>what your experiences are. Maybe there will develop a fruitful
>discussion.
>
>Cheers,
>Tobias
>
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