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Edit by Andrew W.

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[* icon_note] Ever wonder what a polarizing film does? Join us for '''Science with iFixit''' as we shine some light on the inner workings of an LCD and why they need a polarizing film:
[* black] First, the backlight shoots light through a thin layer of liquid crystals. As the light passes through it's reflected at different angles by the crystals' orientation.
[* black] The angle of reflection determines the color of the light we see. In order to change the angle (and by extension, color) the display hardware must apply a voltage across the liquid crystals to change their orientation.
[* black] In order to produce a wide range of colors, each pixel is broken down into three subpixels: red, green, and blue.
[* black] Separate voltages are used to adjust the intensity of each subpixel which, when combined, can create millions of different colors.