Alyosha2001 Also noticed that the Gaming and Graphics on Sony seem to be the best profiles. I picked them by the less lag they have, as I figured it's also the least processing.

I can only speak for the model that I own: The input lag is the same in those modes, but Graphics mode is worse in that it introduces the smaller sort of eye strain I use to get from temporal dithering. If you are sure you don't suffer from this, then I guess in general you can use modern web browsers and operating systems without any problems.

However, for recent Sony models,

Alyosha2001 I use to take the brigtness to the lowest level

means that you look at PWM in the kilohertz range. This is hard to capture with the shutter method.

Alyosha2001 I also try to use a good gamma, from the video card control panel (usually up by 20-30%)

Be aware doing that can introduce temporal dithering, depending on the graphics card or its driver.

Better methods to detect light flicker are discussed in the oscilloscope thread: https://ledstrain.org/d/312-homemade-oscilloscope-to-detect-pwm-diy-guide
The shutter method's sensitivity depends on the camera, but is usually not high enough. Plus the smaller the fluctuations, the more difficult it becomes to detect them, however they can still cause eye strain and headaches.

          a month later

          KM Thanks a lot, read your posts and decided to give 43X81J another try!

            I have a Samsung UE49MU6470 (49 inch) which hasn't caused me any issues in almost 5 years of ownership. It's not very comfortable with Smart Apps but I don't use it as a Smart TV.

              diop Interesting, I've never met a Samsung screen without PWM on the low brightness

                I'll give the same advice I give anyone asking about devices, go to a store and look at it in person. If it gives you issues, do not buy it, if it does not give you issues, go ahead and make the purchase but make sure you can return it in case something in the home emvronment combines with the device to cause an issue

                  ensete Done that; however the issues usually appear after a prolongued period of use, as a good screen can be bad with bad settings

                      Alyosha2001

                      I always ask for the remote in the store and see what the settings I am looking at are, just for that reason

                      The truth of the matter is, and I know no one on this forum likes to hear it, is that no one knows exactly what causes our issue. There are tons of theories but none of them have been conclusively proven to be the issue. Without a definite cause identified, there is simply no way to empirically know if a device will be usable or not aside from testing it out live in the flesh.

                        a month later

                        So I went from Sony 43x801j (IPS panel) to 50x81j (VA) and then to 50x89j (also VA). I tried different settings, not letting the brightness below 5, disabling all enhancements, RGB and YCbCr color spaces, did not adjust the colors neither in the video control panel nor in the TV.

                        The thing is I don't get red eyes as from PWM, but headaches and fatigue, which makes the TV almost unusuable.

                        When I bought the last one the sales told me that, because I had 4 returns, I could not do anymore, so that is it.

                        Don't know what to try next, what settings or tehniques, whether to update the firmware, etc. The brightness, even at 5, seems a bit high for me, so that could be it, but don't know to to reduce it without flicker.

                        • KM replied to this.

                          Alyosha2001 because you mentioned it a while ago, I have reduced the R-Gain/G-Gain/B-Gain values, a setting that I didn't touch before, to "Min" each. The PC picture is noticeably darker now but the image quality didn't suffer much. By reducing the values I did not notice additional eye strain.

                              KM Thanks a lot, that's very useful! I'm trying that right now.

                              My portable oscilloscope has arrived (it's screen flickers - irony 🙂 ) so now I have to wait for the photodiode and the resistor to try it on

                                Not sure what the equivalent model in Europe is, but in North America I tried 43X85J and it was not usable

                                  degen the 85j is simmilar in theory tu x81j, just with higher refresh rate. The salesman told me that, in his opinion, the x81j should have better quality.

                                  I'm using the 50x89j with the recommended settings and it gives me mild headackes; usable for short periods, not recommended for work.

                                  One thing I tried is the latest driver for gtx1070 which has an option of YCbCr 422 color space, that seemed to help a bit.

                                  So, in summary: try brightness not below 5, gaming mode, disable all reality creation and contrast enhancements and light sensor and power saving.

                                  I could not find another TV in couple showrooms (tried them all) without PWM. Still waiting if someone finds a better solution

                                    Just tested with the oscilloscope, and it has 50kHz flicker at brightness below 15 (not 5). Above it is flat, but too bright for me.

                                    Also tested my Fuji X-T30 camera which gives mw simptoms and found a big flicker on it.

                                    So, yes, I think my main agressor in theese cases is the flicker

                                    dev