and from the Sure Electronics manual, it has display buffer. How often are the actual LEDs updated from this buffer? And are they strobed, or do they stay on until the next update?
What about transfer of data to the display buffer? From the above page, it looks like you need to transfer 14 bits/LED. How long does it take? How fast can you transfer the data?
Thanks a lot for any help on this.
Mark
P.S. If anyone is wondering why we're looking for fast refresh and transfer rates, let me say what the application is: to study human vision during saccades, which are very fast eye movements. The eye moves so fast, in fact, that 1000 Hz or higher update rates are required.
All matrices use multiplexing, it is likely that they also use them at the slowest rate you can get away with, that is refresh of just over 32 times a second.
If you want to do anything fancy like this then it is possible to write your own refresh routine or make your own hardware.
My question was actually about the 3216 display. If anyone has any firm information about how fast it refreshes itself, I'd be very happy to know about it.
Mark
P.S. This is off-topic, but I'm not sure where that 32 frames/sec number comes from. Most people can detect, and are annoyed by, a 50-60 Hz flicker, especially somewhat in the periphery of the visual field. If you take even a 100-200 Hz flicker, and make an eye movement across it (a saccade, which you perform on the average 3 times/sec), the individual flashes paint themselves on the retina, and eveything becomes jazzy and very unstable.
I don't know the number, but I can tell you that one could sometimes notice the flicker, so it's definitely under 100Hz.
Did you try asking Sure directly?
This agrees with information that I got from Sure Electronics that the typical refresh rate is 97 Hz. It's too bad that there aren't faster LED arrays out there, other than the Peggy from Evil Mad Science.