DiegoRojo this is what I am trying to find out.
Would you like to try out if a reflected light from the screen does the same?
I posted here a couple days ago:
Mrak0020 I've just found out I have eyestrain from looking at reflected light from the screen. You can test it on paper. So it is the light in my case.
You can test it by going to the dark room and looking at the screen reflection at the piece of paper, even on low brightness.
Be careful, i found out that looking at bad screens in darkness may be way worse than doing it in full light. No matter what is the screen brightness. Avoid looking on screen, avoid any light directly from the screen, the screen should be turned away from you.
To get the best results it makes sense to test it with your worst phone. Compare with the reflected light from normal tech at the same perceived brightness at the same room.
I am also having problems with new oleds, no problems with old oldes, no matter what the pwm is.P.S. This result with reflected light is so weird, I will double check it myself a few extra times.
I have a hypothesis about this light, checking it out right now.
In the last few years manufacturers were fighting for increased brightness and readability outdoors, under the sun, for increased amount of colors. Most probably some of these improvements lead to the eyestrain. It is not a well-known characteristic of the screen, visible in the screen specs. It it something subtle within the screen, can be found out only by disassembling.
By disassembling ips screens, it was found out that a part called polarizing film makes an impact to the problem. But it is not a source, its replacement leads to very subtle improvement. There should be something else.