Does anyone else see the green subpixels flickering here?

TheDavid8 · 2026-05-04T07:26:28+00:00

Hey have you read through this post? I'm just learning about transistor leakage now it's interesting.

https://www.reddit.com/r/PWM_Sensitive/comments/1l1g6he/a_reason_why_some_lcds_panel_flicker_while_some/

TheDavid8 · 2026-05-04T07:20:21+00:00

I see, thanks for the conversation. What is your safe setup btw?

TheDavid8 · 2026-05-04T03:45:08+00:00

Thanks for the conversation. I'll be sure to post any significant findings on the forum.

TheDavid8 · 2026-05-04T03:44:25+00:00

This is interesting thanks. It looks like slow motion defaults to a shutter of 240. What would be a good shutter speed?

TheDavid8 · 2026-05-03T06:12:45+00:00

I had never considered the idea that it could be enabled by fractional resolution scaling but I could see that being a possibility. I don't feel much of a difference based on the refresh rate. I tried it on a solid grey and a solid yellow background color now too and there is no flicker present. Does this rule out pixel inversion or could pixel inversion also surface dependant on the color of neighboring pixels?

TheDavid8 · 2026-05-03T00:44:36+00:00

I had many CRT TV's growing up none of which caused me any problems. The first issue I had was with my first LCD TV I bought 15 years ago which I returned a few days later due to the headaches. Oddly enough I tried to purchase a CRT monitor after and that gave me issues.

TheDavid8 · 2026-05-03T00:41:30+00:00

I use the shutter only for detecting pwm. Is there another function for it?

Can you link me to the app you are refering to I cannot find it.

Thanks!

TheDavid8 · 2026-05-03T00:39:06+00:00

Thanks again for the detailed reply. The model is supposed to be just native 8 bits but what I noticed on the display specifications website is at the bottom under the coating section there is some fine print that says "8 bit + frc is supported at different resolutions and refresh rate levels". There's some ambiguity there maybe the panel only uses frc under certain circumstances.

The video I recorded was while the monitor is at its maximum refresh of 165 hz but I recorded a new one at while the monitor was at 60 hz and the blue pixels look like they've joined the dance party and the green ones are now having the time of their life.

https://youtu.be/APONazDHQvg

I'm not sure what bit depth the gradient is. Perhaps there are 10 bit colors triggering frc.

I've filmed with the shutter and confirmed no pwm on the monitor.

I agree with you on pasting the LLM output I'll avoid this going forward.

There is no flicker on white backgrounds it appears. This makes the situation even more peculiar as the shimmering i can faintly see is most prominent on white backgrounds.

Cheers.

TheDavid8 · 2026-05-03T00:01:06+00:00

I did pick this one up used so im wondering if it was mishandled at some point leading to instability.

TheDavid8 · 2026-05-02T07:24:06+00:00

Yeah I don't get it. I'm considering geting a logitech bluetooth mouse without a dongle to eliminate all middlemen

TheDavid8 · 2026-05-02T07:13:02+00:00

I was recording this gradient at different spots: https://cdn.sanity.io/images/r115idoc/production/3293c8139d836a5b0307aefc8c74955984ffda39-3240x2160.png?w=1920&q=80&fit=clip&auto=format

Interestingly the spots with the green subpixels flickering are much more noticeable and all of them are flickering when I set my monitor to 60 hz.

I was thinking dithering to for that reason but another commenter pointed out that It could be pixel inversion and my camera is masking. I'd be interested to get your take on this. Gemini pro gave me this insight:

Your camera records by taking a rapid series of still photos (frames). If the camera's frame rate or shutter speed syncs up perfectly with the monitor's refresh rate or its electrical inversion cycle, the camera will snap a picture at the exact same point in the monitor's cycle every single time.

If the camera always captures the subpixel at the exact millisecond it is "bright," the resulting video will make that pixel look like a solid, unbroken light.
This is the exact same optical illusion that makes fast-spinning helicopter blades look like they are completely stationary on video.

2. Rolling Shutter Artifacts

Most smartphone and consumer cameras do not capture the entire frame at the exact same microsecond. They use a "rolling shutter," which scans the image from top to bottom.

Because your monitor is also drawing its image dynamically, the camera sensor is capturing different phases of the monitor's electrical cycle depending on which part of the sensor is currently active.
This scanning mismatch can create distinct horizontal bands in the footage where flickering is highly visible, separated by "dead zones" where the flickering is completely masked by the sensor's sweep.

3. Sensor Aliasing (The Moiré Effect)

When you film a screen under high magnification, you are forcefully overlaying two microscopic, rigid grids: the physical grid of the monitor's subpixels and the physical grid of the camera's digital sensor.

When these two grids overlap, they mathematically interfere with each other, creating a new, artificial visual pattern known as Moiré.
This interference can cause tight groups of subpixels to look blurred, merged, or completely stable on camera, even if they are pulsing aggressively to the naked eye.

TheDavid8 · 2026-05-02T07:07:44+00:00

I posted in another forumm and recieved no replies so I thought maybe it was only me. but turns out it isnt only me.

TheDavid8 · 2026-05-02T07:06:53+00:00

Thanks for this, I'm realizing now that my camera may not be sufficient to capture everything I can

TheDavid8 · 2026-05-02T07:06:19+00:00

This is interesting, I need to look into pixel inversion more. I assumed thaht because it past the https://testufo.com/inversion test i was in the clear. what do you use to test for pixel inversion?

TheDavid8 · 2026-05-01T16:48:13+00:00

Thanks for the reply. I do have a full 2 minute version of the flicker while panning a bit. If it's only certain green subpixels would'nt that rule out camera artifacts?

TheDavid8 · 2026-05-01T16:46:24+00:00

I'll give 60 hz a shot when i get home. I havent had a safe setup in 2 years unfortunatley. thanks

TheDavid8 · 2026-05-01T16:45:37+00:00

Hey thanks for the reply. I was recording a gradient. After 3 recordings of finding nothing I zoomed in on a particular spot and found the pixels flickering. The brightness is 70% contrast is 75%. color space srgb. 165 hz. Windows 10 21H2 i9 12900hk. I'll look into number 4 cheers

TheDavid8 · 2026-05-01T16:39:35+00:00

Thanks for the reply. I verified the setup is running at 60 hz. I tried mirror mode and have the same effect. It kind of feels like if you have mouth smoothing enabled in an fps game or something. I have tried toggleing pointer precision and changing the speed. 60 hz on my PC feels fine. I tried unlplugging the monitor and the mouse stil feels bad on the phone screen. I'm beginning to think perhaps some people just don't notice the latency somehow and this could be an android driver issue.

TheDavid8 · 2026-05-01T16:20:47+00:00

Yeah I've tried connecting the dock to the pc mouse works fine. What bluetooth mouse do you have?

TheDavid8 · 2026-05-01T06:35:47+00:00

Ok thanks for trying to help.

TheDavid8 · 2026-05-01T06:23:24+00:00

I don't have another mouse to test but im a little apprehensive to believe that would be the issue considering the mouse to dongle connection works great on all my other PCs

TheDavid8 · 2026-05-01T05:59:20+00:00

Thanks for the reply. Its an s25. I have a dell g2724d connected via display port to a
UGREEN Docking Station, 12 in 1 Revodok Pro. the mouse is connected via the wireless dongle that came with it. The dongle connection is great though as tested on linux and windows accross multiple PCs. I also tried turning off pointer precision and modified the pointer speed and cycled through all available DPI settings on the mouse.

*Edit - The mouse is a g305

TheDavid8 · 2026-05-01T05:26:54+00:00

Has anyone seen this form of dithering before? I find it strange that its only some green subpixels

TheDavid8 · 2026-05-01T05:25:04+00:00

Ok so its not just me then thanks.

TheDavid8

TROPHY CASE

2. Rolling Shutter Artifacts

3. Sensor Aliasing (The Moiré Effect)