3 ms·
PWM is done by modern phone displays (iPhone and Android) but is terrible for eyes and the nervous system at large. Its only advantage is cheapness. In layman's
by goldenkey 5y ago
PWM is done by modern phone displays (iPhone and Android) but is terrible for eyes and the nervous system at large. Its only advantage is cheapness. In layman's terms, PWM is when instead of lowering the brightness of the display, it is instead flickered to lower perceptible brightness. Please don't try to purport popular with healthy. That ship has long sailed.
[1] https://medium.com/@moe.zainal/screens-monitors-headaches-migraines-pwm-migraines-e7b19c81ed7e https://medium.com/@moe.zainal/screens-monitors-headaches-mi...
- marcan_42 5y agoPWM is only a problem if the frequency is low. If the frequency is higher than the frequency response of the light sensitive molecules in your retina, it is no different from DC from a biological point of view. Claiming otherwise would be on the same level as audiophiles claiming to hear ultrasound. Please don't try to paint entire classes of technology as unhealthy just because some low quality implementations are. PWM is a fundamental technique in electronics and displays and there is nothing wrong with it at that level. Nobody gets migraines from > 1kHz PWM. If your backlight is doing 60Hz PWM then you might want to get a better display.
- goldenkey 5y agoThe major flagship manufacturers are all doing PWM < 250hz, some like Google Pixel variably hitting close to 100hz.