Judder is an irregular representation of movements on a screen that is directly related to the display duration. The effect mainly occurs with fast camera movements. As soon as a 60 Hertz panel displays material with 24 frames per second, a so-called 3:2 pulldown is generated, since the number of frames does not smoothly merge with the frame rate. Here, the frames are displayed alternately for 2/60 and 3/60 seconds. Features like Perfect Natural Motion, Motionflow or TruMotion can minimize this effect. Devices with 120 hertz are much less affected because 24 is a divisor of 120 and the display duration is therefore not affected.

Judder Infographic
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