olgomar What does the LG's wave look like before and after the threshold? The more data we have, the better.

I have been interested in buying a Rigol oscilloscope, but I am unsure if the display flickers or is otherwise uncomfortable. Could you measure the display if you have the time? It seems no one has ever done this before. They seem to use a very special form of LCD that differs from standard ones.

Since you use the OPT101 circuit, did you find it can capture even high frequencies? I was concerned of its low bandwidth specs that say like "14 kHz".

      ryans Before throwing the phone away, you might want to try to unlock it and install a custom ROM. Those may make the device more responsible. By doing do you could also provide info about which ROMs are eye-friendly on the S5.

        KM Could you measure the display if you have the time? It seems no one has ever done this before. They seem to use a very special form of LCD that differs from standard ones.

        Since you use the OPT101 circuit, did you find it can capture even high frequencies? I was concerned of its low bandwidth specs that say like "14 kHz".
        Edit: I just re-read your post and saw you want a measurement of the Rigol, it is packed away again atm, so I will get on to that the next time I do some testing.
        KM What does the LG's wave look like before and after the threshold? The more data we have, the better.
        I have put up the LG G5 flicker measurement photos here:
        https://imgur.com/a/McR5oFm
        I do not know about higher frequencies with the OPT101 other than the tests I have done so far.

              olgomar I meant the LG v30, because you said while it flickers it has a different waveform that causes you no trouble. Would be interesting to analyze the difference. It might help understand the difference between "good" and "bad" flicker.

              If you are interested in your OPT101 speed, you could test it for example with this Raspberry Pi LED circuit: https://ledstrain.org/d/375-howto-create-pwm-led-flicker-with-a-raspberry-pi/3

                  KM I meant the LG v30, because you said while it flickers it has a different waveform that causes you no trouble. Would be interesting to analyze the difference. It might help understand the difference between "good" and "bad" flicker.

                  Sure:
                  https://imgur.com/a/7gvXEvj

                      olgomar That is very interesting. The oscilloscope values are hard to see though. Was the input AC-coupled? Peak-to-peak voltage and frequency of the large spikes (50% brightness) the same as in the sine-like wave (38%)?
                      By the looks of it I would guess that at 50% the hardware switches from 240 Hz to 60 Hz like my OnePlus 3 does it at ~25%.
                      Like you I can not tolerate the 240 Hz but only the small 60 Hz pulsation.

                      But is it small on your device? The peak-to-peak and maximum voltages, which are hard to see in the photos are most interesting.

                          KM Was the input AC-coupled?

                          The input was DC coupled

                            KM I have been interested in buying a Rigol oscilloscope, but I am unsure if the display flickers or is otherwise uncomfortable. Could you measure the display if you have the time? It seems no one has ever done this before. They seem to use a very special form of LCD that differs from standard ones.

                            Here is the experiment result of the Rigol measuring itself. It looks like a higher frequency than the OPT101 will allow so not sure what to make of it.
                            https://imgur.com/a/eEXtcaF

                            • KM likes this.

                              KM The peak-to-peak and maximum voltages, which are hard to see in the photos are most interesting.

                              The cursor measurements have been added on these ones.
                              https://imgur.com/a/LdNgP3t

                                Does anyone know what is going on when the phone is rebooted and a green screen with two gears shows up saying "Android is starting...Optimizing App 1 of 1"??? I am freaking out.
                                I have never seen this before. I checked and automatic updates are deactivated.
                                Have they found another way through? I really do not want more surprises...

                                • KM replied to this.

                                  AGI I believe the Google Play Store updates itself automatically.

                                  • AGI replied to this.

                                      Pixel 3 is due in about 1 month. I'm hopeful that we will find it usable!

                                      • JTL replied to this.

                                        ryans I wouldn't hold my breath. Not until OLED PWM is "solved".

                                            KM Thanks. It actually happens every time I shut the phone down. Like, if I switch off twice in a row, it runs that optimization again...it cannot be a real update...Looks like some kinda bug...

                                            • JTL replied to this.

                                                AGI I think what it's doing is recaching all the app files. Not an update.

                                                • AGI replied to this.

                                                    JTL I know, I'm trying to be optimistic. I wonder if it's possible to have some kind of therapy to make people less sensitive to PWM. I'm concerned because I don't believe OLED is going away anytime soon. For people that aren't us, OLED is great, it produces some really nice colors.

                                                    • JTL replied to this.

                                                        JTL Thanks, it does it all the time now. I googled and read that others have encountered a similar issue upon installing new apps. I did install two new apps recently. I will try to uninstall and see how it goes.

                                                        On a different note, my "classic" Nokia 3310 3G is giving me a hard time. Unusable. I cannot believe I am incapable of utilizing what should be the most basic of the phones. So I am in the quest for another solution. Has anyone tested Yotaphone 3? I remembered someone being satisfied with Yotaphone 2, both displays, but right now that model is only available on eBay for 3 times the price of the new edition...

                                                          ryans I wonder if it's possible to have some kind of therapy to make people less sensitive to PWM

                                                          Cannabis medicine is the closest to that goal I've found.

                                                          We need more reverse engineering research to disable PWM on Android phones, similar to what @Wootever did for Samsung phones. His work was great progress though.

                                                            Just a side note because I am confused how some of you talk about AMOLED PWM like it is unavoidable. It is not! There are more and more devices with which you can avoid PWM by setting the brightness manually. Maybe you know this but it did not sound like it.

                                                            • JTL replied to this.
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