Essay on Vertical Tearing and Jerking

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I thought the delay in TFT LCD panels was due to the crystals realigning themselves to a new angle.
I believe Grey was right further up, as in pixels on an LCD only change if there's new information.

Think of LCD like this - light passes through a layer of crystals, that bend light according to which direction they're facing. These crystals are controlled by currents in a matrix grid. Whenever you change the currents, the crystals need some time to move before settling. This is what the 25-12-8-6ms whatever is all about. The lower the ms, the faster the crystals readjusts.

Anyone got links to this to perhaps prove me wrong?