Liquid Crystal Display

This non emissive device produce picture by passing polarized light from the surrounding or from an internal light source through liquid crystal material that can be aligned to either block or transmit the light.

The liquid crystal refreshes to fact that these compounds have crystalline arrangement of molecules then also flows like liquid. It consists of two glass plates each with light polarizer at right angles to each other sandwich the liquid crystal material between the plates.

Rows of horizontal transparent conductors are built into one glass plate, and column of vertical conductors are put into the other plates. The intersection of two conductors defines a pixel position.

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In the ON state polarized light passing through material is twisted so that it will pass through the opposite polarizer. In the OFF state it will reflect back towards source.