Pulse-Width Modulation, or PWM, is one of the ways display makers can use to adjust the display's brightness. PWM is considered to be an easy (or cost-effective) way to control the brightness, but it has serious drawbacks, such as flicker that may cause eye strain and headaches. In this article we'll discuss PWM and its effects on OLED displays.

Display PWM duty cycles

PWM basics

PWM is easiest to understand in displays that use backlight, like LCDs. In LCDs that use PWM, the backlight is always on at its fullest brightness. If you want to achieve a lower brightness, you turn the display on and off in a very high frequency. This frequency is not perceived by the human eye, which usually sees anything that flickers faster than about 60Hz (60 times per seconds) as consistent. Some people, however, are much more sensitive to flicker.

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OLED display illumenance vs OLED general lighting

As someone who lives in an OLED lit house I would want to know about any deleterious  affects of a room lit  by OLEDs at the half or quarter brightness setting. Of course it's a bit of an esoteric question that pertains to an audience of dozens or fewer.  



according to Rtings.com the LG Panels don´t use PWM. 

best regards,


Getting a TV which is free of subliminal flicker

10% of the population suffering ill-health because of TV flicker is a stunningly large number of people. Globally this is billions of people. UK wide it is  millions.Unfortunately everybody in our house suffers from it so I doubt that it is just 10%.Anyway, thanks for the article.

Unfortunately the article and the links give no help - where is the list of flicker-free TV's?So I am still looking for a PWM-free TV (and not one which blends PWM with something else instead of just properly getting rid of subliminal flicker).

Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters