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Interesting discussion here. This link just for learning about VCOM:
https://www.linkedin.com/pulse/what-vgh-vgl-vcom-its-characteristics-lcm-display-rachel-li-osh8c
Interesting discussion here. This link just for learning about VCOM:
https://www.linkedin.com/pulse/what-vgh-vgl-vcom-its-characteristics-lcm-display-rachel-li-osh8c
photon78s Interesting discussion here. This link just for learning about VCOM:
You mean this patterns are not vcom? Okay, its better to name it "vcom mechanism" or Interlace pattern artifacts which used in pcmonitors reviews
I measured today aoc 24b1h, dexp df24n3, Xiaomi Mi Desktop Monitor 1С. All of them have 2-step pixel twinkling ( left - right ).
Acer 240y dont have this, its vcom similar to my benq ( 4-step pixel twinkling, twice low frequency compared to new monitors ). I got acer for testing
Nope. No assumptions of anything. Just trying to figure this concept out. I some point maybe you could add vcom to this forum's wiki or the glossary section. Btw, is your username "simplex" refering to simplex noise?
simplex from the word simple - simpler, simplification of the complex
ok I will add after done some tests. I found 2 main vcom patterns - horizontal ( left to right ) and chess pattern
Here is some results I got:
When I set my 165hz xiaomi panel up to 45hz ( 30…45 ), no green vcom columns anymore and you can use monitor and feel only grapfic card + windows dithering, no "dithering" added by monitor
https://cloud.mail.ru/public/frSj/jFbYfBr1w
When I set to 46hz or more (50, 60, 100, 120, 165) - vcom add its bars and eye-nerve got strain after 20+ minutes
https://cloud.mail.ru/public/WjBP/ga9DxqJGa
p.s. all vids slowed down 4 times. There is static image recorded
p.p.s. all modern monitors I tested have same vertical bars or another pixel sticking protection. I think pair-based vcom (first frame: left green pixel shine and right is closed, second frame: left is closed and right is shine) overload eye-nerve. My old-safe benq dont have pair vcom, it have 4-step
In engineer menu I found no options regarding vcom adjustments. I think it controlled with extra chip in panel board scheme, or it is t-con config
Here is vcom details for high-fps panels -> https://www.powersystemsdesign.com/articles/balancing-image-quality-and-power-use/22/10024
My new findings:
qb74 There is a "safe" gudeline I'd say for monitors.
Not really. Just out of your guide, flicker has zero impact on me whatsoever, and refresh rate ABOVE 60hz causes me symptoms, higher resolutions are worse for me, and I need to be sub 3000k color temp, not 5000k
I know there is a strong desire to find a "silver bullet" that cures us, but it doesn't exist. Each person needs to find a specific setup that works for them and then never change it.
flicker has zero impact on me whatsoever,
Flicker impacts every single human being, whether they perceive it or not. All studies I've come across point to this conclusion.
and refresh rate ABOVE 60hz causes me symptoms,
You might've chosen monitors which have a modern wide color gamut backlight (KSF or QDEF), every monitor is a story of it's own.
higher resolutions are worse for me,
Same story as above, depends on panels which you've used.
and I need to be sub 3000k color temp, not 5000k
Yes, ideally no blue light is best but not everyone can afford using a red screen all the time.
but it doesn't exist.
It does, people here just seem to like going on wild goose chases.
simplex That's a good idea. we already have a similar list on the wiki. with many people added hardware.
simplex Speaking of which running windows update services significantly affects eye pain, unexpectedly ).Even if you installed a clean Windows, but left the update services on, then on average after a day will arrive “hidden updates” which will not even be in the list of updates and you will feel pain in the eyes, experienced on myself. Just some information for "club" members ).
Then, how I am struggling with "previos card rendering configuration" or a hidden Windows update. Step by step:
1) I uninstall the driver in the normal way for Windows.
2) I reboot into safe mode and uninstall via DDU.
3) I go back to normal mode and check that the services and tasks to update widnows are stopped.
4) By sequentially running the following commands:
DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow
5) Installing a different driver than the one I had.
6) Reboot
7) Repeat steps 1, 2, 3, 4.
8) Install the driver you need (in my case, the one I had).
9) Reboot
Thank you, good to know this!
After 1 week being without any screens except smartphone, eyes got rested
When I sit in my z390+rtx2070s, pain between brows begins after 2 hours. I switched GPU to gtx1060, cleared CMOS removing battery, and pain stopped
So, after switching from gtx1060 to rtx2070s, 1.5 years is time when I started to feel strain. Same time exp for my wife but with rtx3080ti card
Looking GPU specs, I found gtx1060 and 1660s (which is safe according to this forum) are directX 12.1, when rtx20 and newer gen are directX 12.2 ultimate. Intel UHD630 or UHD770 or IRIS XE or Intel Arc iGPU - also 12.1, when amd 610m and newer are 12.2
My question: who use dx12.2 gen graphic card without any issues? Note, dx12.2 support was introduced in win10 2004 and newer. In my theory, win10 <2004 and dx12.1 graphic cars are safest combos
Ivan_P
Rigol oscilloscope (ideally at least 100MHz) & https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3257&pn=PDA100A2 probe