chahahc Here's a playlist I made of various recorded subpixel arrangements (of my lenovo p24h-10 monitor). I slowed it down to 30fps (cause that's all windows video editor supports lol) so the dithering should be more visible since there's (hopefully) no frame loss.
Thanks! I see the flicker now. I also see it on your first vid (in your first post in this thread) - last time I was watching it on my phone where it's not visible, but on my desktop monitor it is very visible indeed.
What model is your recording device (smartphone)?
chahahc Hi again,
I had a 1st gen iphone SE laying around, and I bought the same microscope as yours. So I have the exact same setup as you.
Here's a vid of my Dell 2408WFP monitor (I made it show 128,128,128 gray fullscreen). (click the "Download" link).
For some reason, the video came out really noisy (looked similar to high-ISO noise). I wonder if I can do something to get a video as clear as yours. Any idea?
Edit: I now made more several attempts to get a clear video:
To no avail. 
Edit: Apparently the video quality is dependant on the screen that you're shooting. I now shot my built-in laptop screen (Lenovo laptop) and got a very clearly TD'ing video!
I don't know If the colors I chose were within sRGB or not. I'm not really versed in color spaces. I just inputted various RGB numbers into ms paint to make the images. The site you linked does display image differences on my p24h-10 monitor and iphone se. The darker colors seem to have more prominent dithering than the lighter colors. Like the dithering at 100,100,100 for the iphone SE and 6s is very prominent.
I recorded at maximum screen brightness settings with all ambient lights turned off. It does take a bit of fiddling with the microscope focus to get a clear image.
This is a great video of your iPhone SE 2020. Many thanks and congrats for capturing this.
It may be worth sharing on other forums like this MacRumors thread.
Note -- I needed to change the YouTube video to "720p60" to see the flicker (dither). The default of 420p (which I guess is based upon my bandwidth) showed no flickering at all.
Are we sure this is dithering? Could it just be LED inversion or LED light flicker (the same as an LED bulb would flicker, unless flicker-free)? Curious about @Seagull hypothesis on what we are seeing?
Any chance you can test it using ditherig?
Just looking at it makes me sick.
It looks like the microscope is only about $20 USD, that sounds a great price to investigate this, is that about what you paid?
I updated my post with links to better videos that I recorded. The recordings are done with a 1st gen iphone SE not the 2020 version. All the tests were done with ditherig running on an intel g4560 using the IGP so the flickering shouldn't be from the OS.
The lagom and blurbuster pixel inversion tests do show pixel inversion issues at certain settings on my monitor. But at the setting that I recorded the updated videos at, I could not see any pixel inversion with the naked eye.
Here's a microscope video I recorded of two patterns at one monitor setting that showed visible pixel inversion and one setting that didn't.
https://www.youtube.com/watch?v=-8gyeFWmAOE
I don't know what to make of it. I don't really see much difference between the visible and non visible tests. The subpixel flickering in all the videos seems to be occurring at 30hz, half of the 60hz display frequency of the monitor and the phones. The iphone SE first gen did not show any pixel inversion issues to the naked eye when using both the blurbusters and lagom test.
I paid about $20 for the microscope on amazon.
edit: It actually seems that there is indeed very minor pixel inversion issues with the p24h-10 monitor. They were only visible when I went full screen and carefully cycled through each pixel inversion setting. It wasn't visible when only viewing the initial image with all 12 examples shown at once. It seems to cycle around 2a, 2b, 4b and 7a when changing monitor settings. The 7a being subtle enough that is only visible when viewed full screen. I tried full screen with the iphone SE 1st gen and wasn't able to see anything with the naked eye.
edit 2: Interestingly the pixel walk goes away at maximum setting, which are the setting that I recorded the original microscope dithering videos. the screen is too bright at max setting but I guess I'll just try compensating by wearing my maui jim sunglasses since they also help increase the contrast and reduce ips glow.
Results from my tests: (slo-mo camera and @chahahc's microscope model)
All my screens have a pixel flicker (exactly like the one in the original post in this thread). Nothing that I tried reduced it.
Setups that I tested:
The only setup in this list that had a less strong pixel flicker was the Dell 2408 WFP external monitor. Which makes sense, as this is the monitor that gives me least eye strain.
At this point I think I'm seeing "LCD inversion" artefacts and not TD. This probably means I won't find any software solution, and I should just look for a higher-quality (and/or pricier) display.
It could be interesting to boot an OS/GPU driver combination that lets you reliably activate and deactivate GPU-side temporal dithering to see if switching it on and off causes any observable change in the pixel flicker.
For example, Nvidia has an official Unix application, NVIDIA X Server settings, that lets you do this with Nvidia GPUs.
KM It could be interesting to boot an OS/GPU driver combination that lets you reliably activate and deactivate GPU-side temporal dithering to see if switching it on and off causes any observable change in the pixel flicker.
Indeed. I did that now.
ditherig.exe set to "Dithering off": https://share.icloud.com/photos/056qVnI9n2n3S-uiHrjCGCrpg
ditherig.exe set to "Spatio-temporal 1": https://share.icloud.com/photos/041v9WasX11htkpGqO9zFMM-A
I don't see any difference between these 2 videos.
And I know ditherig.exe is working because, when it's set to "Dithering off", I see banding in my wallpaper.
KM For example, Nvidia has an official Unix application, NVIDIA X Server settings, that lets you do this with Nvidia GPUs.
Yes, I tried that, but that app barely had any options. And certainly none related to dithering. I think the reason is because I'm on a laptop (i.e. "switchable graphics" between intel and nvidia).
KM It could be interesting to boot an OS/GPU driver combination that lets you reliably activate and deactivate GPU-side temporal dithering to see if switching it on and off causes any observable change in the pixel flicker.
I know certain AMD GPUs under Linux allow you to easily toggle dithering (verified with my lossless capture setup). Unfortunatly I'm not @logixoul and don't have the same high-speed camera setup. 
I don't think ditherig does anything to help anymore in Win10/11; it doesn't help that much nor in 8.1 in versions past 1.7
Just load up a greyscale gradient from 0 to 255 at 100% zoom. If you have banding on a non-8-bit panel with dithering off, then the app works.
Adding to what a couple of others have said, I believe this is pixel inversion, not temporal dithering. One clue is that it happens on all colors except for pure white. For many screens that I've tested (but not all screens), pixel inversion is worst at fairly light colors (such as #A0A0A0) but is difficult to detect at pure white.
In fact, I think it would be very difficult to design a test like this that measures temporal dithering because you somehow have to control for pixel inversion. Perhaps the best you could do would be to test a series of consecutive colors, like #A0A0A0 through #AFAFAF and try to determine whether certain colors in that range flicker more than other colors in that range. Assuming a 6-bit panel, if roughly 3/4 of those colors flicker more than the other colors, then the additional flickering would likely be due to temporal dithering.
You guys ever check if this happens more at 60hz vs 75hz vs 120hz vs 144hz, etc?
I have a few different monitors with those refresh rates to check but don't really have the tools to outside of a regular phone camera.
Elever I've only tested a handful of devices, but the pixel inversion frequency that I saw was 60 hz regardless of how I set the refresh rate.
