here is lg qned80 series TV. Look at PWM, very square-view-form, when I measure TVs in shop on the 3 january '24, I found only varyaties of this form. If you compare it to sony ( which is no-eye-strain for me ) you will find they use different types of PWM waveform. Some users reported, they can use samsung s10 (which have sine-wave PWM) and cannot use samsung s20 (or higher, dont remember) - the PWM form is changed to square-view.
I measured different monitors and TVs, and can say the PWM form is key. All "old and safe" PWM screens I measured, have sine ( smooth, curved ) view