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I'm sorry (infosec.pub)

submitted 4 weeks ago by memphis@sopuli.xyz to c/internetfuneral@lemmy.world

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[–] r00ty@kbin.life 3 points 3 weeks ago (1 children)

I think the effect produced by the strobing due to DC rectification is markedly different. That produced a gapping when moved (since the LED is off during some parts of the movement and on for others). The effect when there's a somewhat brighter light source around a darkened room is very different where the lighter source seems to move independently of the object it is attached to, with no stuttering/strobe effect present.

The independent movement effect is much more likely due to response time differences. I thought I'd take a look and see. This https://www.nature.com/articles/s41598-018-34073-8 article by nature does mention there is a response time difference. However the vast majority of the paper seems to be about the effects on cone response time due to lack of calcium and other cone specific testing.

This https://pmc.ncbi.nlm.nih.gov/articles/PMC2063471/ article seems to imply that there's a 20ms lag for rod reaction time. Where they tested people's reactions to both kinds of stimuli and measured the response times.

[–] 2xsaiko@discuss.tchncs.de 1 points 3 weeks ago (1 children)

Hmm, interesting. Then I don't think I've ever seen that myself, I thought you were talking about the strobe effect, that's the only thing I associate with 7-segment displays (or other lights) in dark environments. I'll have to experiment with it sometime :P

Also, I guess I stand corrected about the response time difference!

[–] r00ty@kbin.life 2 points 3 weeks ago

It worked best with alarm clocks because the outline of the clock was likely 100% only picked up by rods, but the display is visible clearly by the cones. So if you picked it up and moved it, the display would seem to move independently of the case it was part of.

I think the second link does suggest the difference between response times varies between people. So, maybe it's just more noticeable by some?