OLEDs are typically current driven devices (sometimes referred to as “constant current”), with the brightness directly proportional to the current provided. As a result, they are 1-100% dimmable. Brightness of OLED panels can also be controlled through the use of pulse width modulation (PWM).
PWM dimming works by pulsing the electrical power supplied to a device such that it rapidly turns on and off in quick succession providing only a percentage of full power over a period. The result is that the light source appears to have a lower brightness because our eyes simply average the effect out.« Back to Glossary Index