[visionlist] CRT monitor solutions

[Sol Simpson]

Hi Jon,

 

>> would you be able to connect the photodiode

>> simply to a scope and 

>> show us the time the screen 

>> actually takes to go black to 

>> white and vice-versa?

 

Sorry, I can't do that. 

 

I'm not sure how, but the following review seems to look at things like how
the response time varies based on what to and from color is used in both 60
Hz and 120 hz modes. 

 

http://www.xbitlabs.com/articles/monitors/display/samsung-sm2233rz.html

 

As mentioned in my last post (maybe not actually posted yet mailing list) I
do not know about their true bit depth.

 

Thanks,

 

Sol

 

From: Jon Peirce [mailto:jonathan.peirce at nottingham.ac.uk] 
Sent: November-12-09 6:56 AM
To: Sol Simpson
Cc: 'Michael Bach'
Subject: Re: [visionlist] CRT monitor solutions

 





to test the timing using photo sensors and TTL outputs...
    

That's a perfect way to test this. But this means that you were sort of
lucky to find out that these monitors did have these desirable properties?
And others presumably didn't? It would really be great if the manufacturers
would mention this. 
 
  

would you be able to connect the photodiode simply to a scope and show us
the time the screen actually takes to go black to white and vice-versa? My
testing with LCDs, even those that claim to be 'fast' is that it still takes
20ms or so to go fully from one extreme to the other, which means that a
flickering grating is typically lower contrast than a static one etc. This
is also something that manufacturers could easily provide, but never do.

Also, I'm told that often for faster response times some manufacturers are
actually using 6bit rather than 8bit displays and then, potentially,
performing temporal dithering to make it look like 8bits. No sign from the
two that you mention whether this is the case for them.

Jon

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