Please pardon my ignorance. In this topic, it seems to be suggested that higher refresh rates on these phone displays cause more rapid flickering and therefore more strain. I had the impression that (at least with PWM) higher frequencies are less perceptible to the eyes and therefore less likely to cause strain. I have never heard of reducing framerate for better comfort, but indeed the opposite.

Am I mixing up factors which are separate things?

    macsforme Low-frequency PWM hurts the eyes, high-frequency PWM causes migraine. On monitors, hybrid (dual PWM), when the eyes and head hurt. Flicker Free certificate does not mean that pixels will not flicker due to dithering/cheap 6bit + FRC panel.

      macsforme I had the impression that (at least with PWM) higher frequencies are less perceptible to the eyes and therefore less likely to cause strain.

      Generally speaking, I believe your statement is correct. Faster is generally better. For most people, most of the time.

        macsforme higher the refresh rate seems to be more comfortable for me. Also I'm pretty sure higher the refresh rate the more it could mitigate dithering/FRC? (Not 100% just seems like from what I've seen/read)

          Ninkear N15 Pro laptop on FullHD IPS-like panel CSOT SNF601BS1-1 (6bit+FRC)

          The Chinese have not heard of the Flicker Free certificate. The screen flickers even at 100% brightness. On the Poco GT X4 phone the screen flickers at a frequency of 50000Hz (painful to watch). On Ninkear N15 Pro the flickering is “normal”. You can ignore the Modulation depth value. Light Master counts incorrectly at frequencies above 10000Hz. Just look at the curve graph.

          Even if your eyes do not see flicker, this does not mean that there is no flicker. High frequency flickering is a common cause of migraines. At 50% brightness I don’t feel any problems with my eyes. This is understandable, because there is no flickering. Pulsations for IPS panels are also normal. At low brightness, the screen begins to flicker again.

          And flickering again. The truth does not 200Hz, as it was a couple of years ago on all AMD Ryzen laptops. Uncle Liao learns to make laptops good. The flicker for Light Master is too high (out of range). Modulation depth does not display correctly.

          4 days later

          what is the maximum flickering frequency that this device can detect? and according to your experience with this device: do you advice to use it?

          thank you

          9 days later

          Let's look at the lamps. The first will be Xiaomi Mijia Charging Table Lamp 5W (MJTD03YL).

          That's right, the lamp flickers with a frequency of 14000Hz. When the brightness decreases (in read mode), the pulsations increase.

          The second will be Xiaomi Yeelight LED Screen Light Bar Pro 10W (YLTD003).

          At low brightness, the lamp flickers at 1000Hz frequency.

          At high brightness, it is safe for the eyes.

          9 days later

          Here's the Redmi Note 13 Pro Plus 5G with AMOLED 1920Hz screen. Set to 120Hz mode (forced).

          Uncle Liao didn't cheat, it's a very good screen! Honest 1920Hz at low brightness.

          Modern laptops/monitors flicker even with a Flicker Free certificate. Why does TÜV Rheinland think flickering is more 20000Hz safe for the eyes? Take two laptops for example: Maibenben M545 for $500 and Maibenben X639 for $2000. And both flicker! Even at 100% brightness.

          My friend bought a drawing tablet. Blackview MEGA 1 (IPS / 120Hz). At 100% brightness, the tablet owner does not see flickering. The new AMOLED screens also flicker at 120Hz (screen refresh rate). This is a new "eye protection" technology.

          When the brightness decreases to 50%, the eyes do not hurt. I watched a couple of YouTube videos.

          Below 50%, the brightness of the PWM may be too high, especially for sensitive eyes.

          A friend has a Poco X4 GT phone flickering at 50000Hz. He also does not see flicker.

            AlanSmith A lot of people can't see the flicker.

            if watched telephone 10 min per day

              I just ordered one of these. Canyou write up a little guide on what the graphs and numbers mean?

              8 days later

              Office laptop Tecno Megabook T15AA for $600. The screen is high quality, 120% sRGB coverage. Panel N156HCE-EN1 (8bit). Great laptop, except the screen flickers! No need to panic. Only at 10% brightness. The flicker frequency of 25000Hz is also high. There are no problems at brightness above 10%.

              Express review, Maibenben X757 for $1200. Panel NE173QHM-NY2 (8bit) IPS 1440p 165Hz. The laptop screen is flickering. The RGB backlighting of the keyboard also flickers That's all I wanted to say.

              6 days later

              Samsung S24 owners will cry with joy. Your prayers have been heard. Samsung increased the PWM by 2 times (up to 480Hz). And then only at low brightness. I would like 20 times (at least up to 4000Hz).

              The screen is very tiring to the eyes. I feel like I went back to 2013 (when I had a Samsung Note 3). I suffered with the phone for less than a week until I exchanged it for an LG Nexus 5. Just heaven and earth. I don’t advise anyone to buy a Samsung S24 for $1000.

              Xiaomi POCO X6 Pro (5G)

              AMOLED 120Hz HDR10+

              Dolby Vision 10bit+FRC

              I didn’t notice any difference between POCO X6 Pro, Redmi Note 13 Pro+, Poco F5 or my main INFINIX NOTE 30 VIP. Only the CPU's are different. Screens for phones from the same price category. I don't even know if it's worth doing a review? Up to 50% brightness there is almost no flicker. At brightness below 50% it works at 1980Hz.

              8 months later

              Does anyone has xiaomi 14 ultra pwm readings ? Are there any reports of people having problems at the low risk section of the graph ?

              a month later

              Hi @AlanSmith

              is there any 27 or 32 inch monitor that is within the zone of low risk?

              dev