KM It seems when you switch to TV mode or start a connected HDMI device, the backlight tends to get out of sync. It introduces a small flicker then, a high frequency "humming" so to speak

Good find. Abysmally written firmware...

    I think this finding also applies to other devices too. I have noticed on my monitor something similar. It is minor, but I noticed that if my monitor was actually off all the way rather than just sleeping like I normally leave it, I would give the computer a moment to activate the video ports before turning the power on to the monitor screen.

    7 months later

    Hi there, on the 43X81J (2021 model, IPS panel) after the latest firmware update found a new entry in the "Quick Settings" menu called "Power Saving". It has 3 settings, Off, Low and High, and what it does it dimms the screen (among others?).

    @KM Do you have this, and if so, could you test it for flicker?

    • KM replied to this.

      Alyosha2001 I have purposefully never updated the TV, so it is still running Android TV 7.0. It does not have Quick Settings. However, it does have the regular Android TV Settings, and there is a Power Saving entry:

      Settings - Power - Eco - Power Saving - [Off, Low, High]

      The following captures have been made with brightness set to 5 and light sensor disabled; the distance to the TV is always the same:

      Power Saving "Off" (the flicker here seems to be the 60 Hz panel refresh rate flicker):

      Power Saving "Low" (20 KHz flicker):

      Power Saving "High" (still 20 KHz):

          Very useful, so Power Savings got to go! Really need an oscilloscope

          Any tips on how to get the brightness below 5 without the flicker?

          I recently bought a TV, but I don't think the blue light from the TV will affect my child's eyes, so I'm thinking about installing a blue light blocking screen protector?Is this a better way to protect my child's eyes, because I don't want my child to be short-sighted.

            fancy2022

            Most tv`s should have the ability to reduce the blue light in the color temperature settings

            Don't know about the flicker, though

                KM Shouldn't PWM go to 0 on the lowest amplitude? Maybe it's another type of flicker

                  6 days later

                  KM Do you think that if I set the brightness to 5 and then set any of the R-Gain, G-Gain or B-Gain lower could trigger the PWM? (Would it be like forcing the panel to lower brightness than supported by DC Dimming?)

                  Also, could you tell me how to prevent the full black thingy (like when it turns off the illumination), as just watching a movie fading to black can trigger that.

                  I'm really trying to find the usable settings for it

                  • KM replied to this.

                      Alyosha2001 No PWM or backlight flicker here when changing the Gains, but always keep in mind my model is 2 years older and I use an old Android version.

                      To prevent the "black screen" flicker, I sideloaded the app "OnScreenClock 0.5.0k.apk" to permanently display the current time in a corner of the screen. It turned out, as I had hoped, that when some non-black pixels (the clock) are always displayed, the screen isn't recognized as fully black and the backlight won't go to flicker mode then.

                          KM

                          KM That's weird. Even if the brightness is set to 5? That means that it can have a brightness below 5 without the pwm if all sliders are draged to the left?

                              KM To prevent the "black screen" flicker, I sideloaded the app "OnScreenClock 0.5.0k.apk" to permanently display the current time in a corner of the screen.

                              Wait, you have a clock watermark when you're just watching TV?

                                  dev