Liquid crystal display

Liquid crystal display

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Caption: Light micrograph of a liquid crystal display (LCD) of the type used to represent numerical figures. Although liquid crystal (LC) flows like a fluid it's molecular arrangement exhibits some order. An LCD has a film of LC sandwiched between crossed polarizers & set on top of a mirror. In the 'off' state light is able to traverse both polarizers to reach the mirror because it gets rotated through 90 degrees by the LC. In the 'on' state, as here, an electric field applied across the LC alters it's molecular alignment & hence it's polarizing properties; light cannot traverse both polarizers to reach the mirror & the display appears black. Magnification: x100 at 35mm size. Polarized phase contrast.

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Keywords: chemical, chemistry, compound, compounds, crystal, crystal display, crystals, liquid, liquid crystal display

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