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I know how a standard LCD screen in a calculator is multiplexed (Shared rows and columns), but I've recently seen a highspeed recording of a modern LCD Display (PC Monitor) and it didn't flicker at all. How are those types of displays multiplexed nowadays?

Link to the video: https://www.youtube.com/watch?v=0lvtqqlhem8

The flicker at the LED screen is only the PWM of the LED backlight, so the LCD itself shouldn't be flickering...

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All modern high-resolution LCDs are "active matrix", which means that there's a thin-film transistor (TFT) located at each subpixel that is used to store its state for the current frame. The state of the subpixel is stored as a voltage on a capacitor, which is either a separate element or the capacitance of the liquid crystal cell itself.

This means that refreshing the display does not inherently introduce any significant flicker. However, there is a certain amount of leakage associated with the capacitor, and an LCD designer needs to make a tradeoff between minimizing this "droop" by making the liquid crystal respond more slowly, or minimizing the "smear" introduced in fast-moving images by making it respond faster.

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  • \$\begingroup\$ So all modern displays are TFT displays? \$\endgroup\$ – Pwnie2012 Aug 18 '15 at 20:53

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