JTL I don't know, but I would like to. I also have headache with Sony mirrorless LCD's, with old Canon I don't
Temporal Dithering Sensitivity - My Solution
20 days later
I tried ditherig using the Disable All Dithering option and it doesn't seem to help in my work laptop, perhaps a little. Is there anything else I can try? Intel Graphics 510. I get headaches, dizziness, and burning eyes when using it for more than a few minutes. I hate going into work because I know I will have to sit there for hours and suffer looking at the screen.
Have also tried flux and Gunnars, doesn't make a difference for me.
ryans Did the dithering program "work"? As in when I tried it with my brothers laptop which has a Intel HD Graphics 530 integrated chip and looked at this test pattern I could see it banding on the laptop LCD.
JTL Yes there's definitely visible banding. I notice it other places than that website. When I load that website and switch the options from "Disable all dithering functions" to "Spatial (Default)" you can see the banding disappear.
So I think my problem might not be dithering; something else is going on. There still feels like there's something "moving".
ryans Maybe your screen has PWM on the leds. That is easy to check with a camera. One symptom of the PWM I noticed on many people at prolongued use is red eyes.
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Alyosha2001 @JTL I took a video, would be grateful if you could take a peak. I don't think it's PWM since if I decrease the brightness from 100, PWM is very obvious. There still looks like some type of flicker going from left to right.
But, when I attach this laptop to a Dell U3417w, even with Ditherig installed, I see no banding. Perhaps because this is an expensive monitor and actually has 8-bit colors. However I still get eye strain with it. I'd be fine with eye strain from the laptop if I could get none with the Dell monitor.
Here's my video:
https://drive.google.com/file/d/18aKec17gTa_S5AgSUavvD3NycSijj75a/viewI'd consider getting my company to use my old Thinkpad T430s and image it, since it gives me no eye strain, but it doesn't support the resolution of the Dell monitor afaik.
I don't think I'm sensitive to PWM since I can use a Galaxy S5 (AMOLED screen with PWM) fine, but, I have issues with Macbook Pro (no PWM); perhaps PWM is not made equal (some is worse than others).
Thanks for all your help. Nice to know I'm not alone here.
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I think that is PWM. The reason why it's horizontal is because you are holding the phone vertically. Not all PWM's can be captured with a phone camera, the high frequency ones are indetectable unless a DSLR or oscilloscope is used. And the reason the external monitor is not showing banding is because it cannot be disabled, since it is not driven by the videocard
Alyosha2001 Oh I thought the videocard does determine dithering on the external monitor? Interesting. And I see...when I make the brightness lower the PWM is very obvious. I didn't think PWM happened at 100% brightness but maybe this screen is particularly crappy. Thanks for checking.
10 days later
https://www.youtube.com/watch?v=OCDfn9IWc6g
took some video of what dithering looks like on a Dasung Paperlike Pro. I had to use a video because I have eliminated dithering (for the most part) from my setup. Microsoft seems to choose colors that dither preferentially. The youtube compression caused a loss of fidelity, ask me and I'll email you the original video
ShivaWind E-ink definitely requires dithering because it is a 1-bit display technology.. something I remember well from black and white 9" screen Mac days. I looked up your monitor, says it has 3 dithering modes A2 which is black and white only, A16 which attempts to simulate 16 shades of grey, and Floyd which is their implementation of a Floyd-Steinberg algorithm for watching video with. Nice thing to have, enjoy it.
this is a better video
https://www.youtube.com/watch?v=0y-I3hqQgCQThere is more to it than just the panel. There are colors that are fixed, and colors that dither. the dithering pattern can be sort of Celtic knots or like moving dots. there is dithering that always moves, and dithering that only moves when in proximity to a moving mouse cursor. I can say with certainty that the source of dithering is not the Dasung panel because the dithering pattern follows the mouse pointer in video other people have uploaded of thier computers to utube. so the dithering was following Their mouse, not mine.
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I can also see the difference between makes of video card or when I have dithering enabled for the video card using xrandr and when I have it disabled. The primary source is upstream of the panel. I am sure that the panel does dither, but the patterns here are too big and sparse to approximate Grey scale. they are definitely upstream,
I rounded up some old ccfls, did not work for me.
7 days later
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JTL The Dell U3417W, which I have is 8 bit + FRC = 10 Bits: https://www.displayspecifications.com/en/model/4c9077e
When I use ditherig on a laptop connected to this monitor, banding is visible on the laptop screen, but not the external display.
https://www.dell.com/community/Monitors/10-bit-vs-8-bit/td-p/5158579
ryans In theory an external display should always be presented as 8-bits to the GPU and drivers and the display would do any needed dithering on it's own, but sadly that isn't the case and many GPU's and GPU driver do dithering even when presented with a 8-bit color depth from the displays EDID.
Your using 8-bit, you'd have to enable 10-bit manually, and many applications don't support it.
Came across this for possibly disabling dithering in Linux: http://philtechnicalblog.blogspot.co.uk/2012/05/temporal-dithering-good-for-colour.html
ryans It's been covered here before, but the settings for dithering in nvidia-settings looks like this
(And no it does nothing for bad 9xx or 10xx cards)