display
What is PWM?
Pulse Width Modulation - a technique to control display brightness by flickering.
PWM (Pulse Width Modulation) is a method used to lower the brightness of OLED displays by rapidly turning pixels on and off. How it Works: To achieve 50% brightness, the screen might be 'on' for half the time and 'off' for half the time, cycling hundreds or thousands of times per second.
Sensitivity
- Low Frequency PWM: < 480Hz (noticeable to sensitive users)
- High Frequency PWM: > 1920Hz (safer, less noticeable)
Some users are sensitive to this flickering, causing eye strain or headaches at low brightness.
Solution
DC Dimming is an alternative that lowers voltage instead of flickering, but can affect color accuracy.