[visionlist] LCD Monitors suitable with suitable temporal response

Tushar Chauhan research at tusharchauhan.com
Wed Mar 1 04:45:50 EST 2017


I have yet to come across an LCD monitor which offers acceptably uniform 
luminance over the entire screen. Especially for discrimination-type 
experiments where fine-grained control across the entire stimulus field 
is required.

Of course you can calibrate the screen for spatial uniformity, but the 
process is very long and painful without some sort of automation. And if 
you intend to work on colour vision, the problem only gets worse.

Tushar


On 01/03/17 00:59, Nicholas Price wrote:
> Hi Phillip,
>
> What you can accept in terms of LCDs really depends on your 
> requirements. If you just want a reliable 120 Hz update, then there 
> are plenty of gaming-level LCD monitors that won't drop frames. That's 
> the easy part of monitor characterisation though.
>
> Apart from the Display++ and ViewPixx (which are both excellent, and 
> no I don't have an interest in either company) we haven't found any 
> non-CRTs that meet our relatively simple requirements of:
> - Uniform luminance and contrast across the entire monitor surface, 
> from a wide range of viewing angles
> - Rapid onset and offset, such that you get good luminance and 
> contrast control for single frame stimuli.
>
> If you're just interested in reliable 120 Hz to present long-duration, 
> non-moving stimuli, you have plenty of options. If you want static 
> stimuli that are presented for 3+ frames, then you're also reasonably 
> safe. If you want moving stimuli, as long as you don't care about 
> contrast too much, then I think you're also safe. If you care about 
> contrast, then make sure your stimuli are small and always presented 
> in a small part of the monitor so you don't get viewing angle 
> artefacts. At this stage, I don't care about colourful things, so 
> you're on your own there!
>
> Basically, whatever monitor you get, you'll still need to characterise 
> its timing and luminance outputs (at a minimum). For my money, it's 
> worth the investment in a Display++ or a ViewPixx.
>
> nic
>
> On 1 March 2017 at 09:55, Phillip Guan <philguan at berkeley.edu 
> <mailto:philguan at berkeley.edu>> wrote:
>
>     Hello,
>
>     I'm wondering if there are alternatives to CRTs and the ViewPixx3D
>     ($12,000 each) displays that can be used when fast response times
>     are required for temporally varying stimuli. From this paper
>     https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4369646/
>     <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4369646/> it seems
>     that certain gaming monitors may be approaching the required
>     quality level, are there any specific high framerate gaming panels
>     that have come out in the last two years that approach parity with
>     CRTs?
>
>     Thanks,
>
>     Phillip Guan
>
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>
>
> -- 
> Dr Nicholas Price
> Phone: +61 3 9905 5131 / 0424 56 14 17
>
>
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