Re: [visionlist] LCD Monitors suitable with suitable temporal response

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

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.
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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