[EldRick]

All LEDs flicker - they are managed by using Pulse Code Modulation, i.e. turning the light on and off to manage the heat and light levels. All display technology except e-ink also flickers, either because the backlight source is fluorescent or LED, or simply because the image is built up from rapid scan lines and the refreshing as the pixels fade.

It sounds as if your problem may be related to that flickering and the frequency at which it happens.

On Windows, many monitor software drivers allow you to set the refresh rate, and it might be worth playing with different combinations of the refresh rate and resolution - usually a faster refresh rate will reduce the impact on your eyes and brain. A CRT monitor might be worth trying this with, as the slower fading of the pixels means that the refresh is less noticeable than LEDs.

If that doesn't help, it sounds like the slow performance of an e-ink display is your only choice - good luck with the Sony or the Dasung.