It’s the pwm dimming that causes eyestrain. Not everyone, but a sizeable portion of the population.
I found out about it from my doctor back in 2011 when my 11" MacBook Air was causing headaches. The screen blinks on and off at 240Hz which is enough for your eyes to recognize and try and adjust; but it’s not enough for your brain to register what you are seeing.
I used a W530 later on and it was very bad, headaches at anything other than 100% brightness.
Lenovo fixed the issue in 2016 on most of their laptops, and the Retina MacBooks have never had pwm dimming.
The 11" MacBook Air used an LCD screen, not OLED. It may have an LED backlight, but that’s not the same thing.
Not sure why the pulse width is so large on the screens you had trouble with. LEDs can pulse millions of times per second, far beyond what human eyes can perceive. 240Hz, on the other hand, is well within the range of human perception, so they’re lucky if that didn’t also cause epileptic seizures.
Yes, the LCD on the MacBook is where I learned of pwm dimming to start with. It’s a solved issue for most LCD manufacturers.
Most OLED panels in the consumer market pulse at 240Hz. I can’t see the flicker, but text is wobbly on the screen for me and I get headaches after a bit. Turn the brightness to 100 … no more wobble, no more headache, and no more pwm.
It’s the pwm dimming that causes eyestrain. Not everyone, but a sizeable portion of the population.
I found out about it from my doctor back in 2011 when my 11" MacBook Air was causing headaches. The screen blinks on and off at 240Hz which is enough for your eyes to recognize and try and adjust; but it’s not enough for your brain to register what you are seeing.
I used a W530 later on and it was very bad, headaches at anything other than 100% brightness.
Lenovo fixed the issue in 2016 on most of their laptops, and the Retina MacBooks have never had pwm dimming.
Notebookcheck.net tests all their reviews for pwm dimming.
The 11" MacBook Air used an LCD screen, not OLED. It may have an LED backlight, but that’s not the same thing.
Not sure why the pulse width is so large on the screens you had trouble with. LEDs can pulse millions of times per second, far beyond what human eyes can perceive. 240Hz, on the other hand, is well within the range of human perception, so they’re lucky if that didn’t also cause epileptic seizures.
Yes, the LCD on the MacBook is where I learned of pwm dimming to start with. It’s a solved issue for most LCD manufacturers.
Most OLED panels in the consumer market pulse at 240Hz. I can’t see the flicker, but text is wobbly on the screen for me and I get headaches after a bit. Turn the brightness to 100 … no more wobble, no more headache, and no more pwm.