Higher or Lower Hz Better

Dizzy

Hello all,

Is a higher or lower Hz better? If we have a weak or sensitive nervous system (ex. B12 deficiency damage sheath around nerves), would a higher Hz cause more issues?

Thanks,

Abeabe

Dizzy If you mean the speed of the pwm flicker, or the speed of OLED flicker, it is better to have a faster speed, but not too much, I have noticed that if it flickers too fast for example a frequency of 4000hz makes me very dizzy, or it is flicker-free but in reality it flickers very fast with a very low amplitude it also makes me very dizzy, for me the best option is to look for a flicker-free LED screen, but not OLED because those although they are sold as flicker-free are not and they also flicker very slowly around 60 or 120hz, some I think up to 240hz, a comfortable frequency would be between 720hz to 1200hz more or less with some devices that I have tested that have pwm, but a frequency of 60hz, 120hz or even 480hz is a very slow flicker speed and I start to feel a lot of eye fatigue, but there are other factors that contribute to eye fatigue such as brightness, screen size or distance from screen, contrast or color saturation, color temperature, sharpness, dithering, or if the color is very saturated or if there are white backgrounds, or if it's there a lot of contrast or not contrast at all, I have eye fatigue and also if it is very bright I get dizzy too.

qb74

Dizzy Frequency is the number of occurrences of a repeating event per unit of time.
In terms of displays, you got 2 important frequencies to worry the most about:
1.) Refresh rate (a higher value is preferred, lower values can cause motion blur related eyestrain),
2.) PWM Brightness Dimming Flicker, which is a major culprit of eyestrain. +20kHz is preferred (or ideally, DC dimmed)

Dizzy

Abeabe thank you for the detailed information. I will look for Flicker Free

Abeabe

qb74 Sometimes a lower refresh rate is better, for example I have a Sony 65x90L and I have to use it at 120hz refresh rate to not get issues, and I tried a 75x90L and I felt instant eye fatigue with the same settings as the 65" so I lowered the refresh rate to 60hz on the 75" and it felt much better and I was able to use it for much longer, also 120hz looks smoother but blurrier than 60hz in games when doing camera turns and in general, less so when you walk straight towards an object but then the clarity is not very noticeable so you have a feeling that everything is blurrier at 120hz, anyways at 60hz even when it felt better than 120hz I sold the 75" tv because I had some eye discomfort that was not present on the 65" version, also I can't stand my realme x50 phone at 120hz I have to use it at 60Hz to make it tolerable.