Liquid crystal displays, LCDs colour filters

By far the largest application area of aligned liquid crystals is in Liqnid Crystal Displays (LCDs). In LCDs the LC material is sandwiched in between two glass plates with conducting layers indium-tin-oxide (ITO). Figure 9.1 shows the lay out of an LCD. Apart from the ITO covered glass plates and the LC material, the LCD consists of a st ick of various optical layers such as retarders, polariser, analyser, colour filter and a backlight. 

Accordingly, D-STN-LCDs fabricated according to these conditions (with micro colour filters on each pixel) were used to make multi-colour LCD displays. It should be noted that a film-compensated STN-LCD using optical retarder films instead of the STN-LCD liquid-crystal compensator in the D-STN-LCD can also be used. 

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