Flight passenger shares that a fellow flyer put her hair over her headrest, covering the TV screen — and asked Reddit users ...

LED stands for light-emitting diode, and these make up the backlights of some TVs. The LEDs either sit behind the screen (this is called full array) or at the edge of the screen (known as edge-lit).

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It achieves this with a bevy of sensors, eye-tracking technology, AI-image processing and a lenticular lens. There's also ...