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Adam Lebaigue pg 42 Modern Materials Liquid Crystal Displays (LCD’s): Organic carbon based products that exhibit both liquid and solid properties When a voltage is applied to a cell on the screen the cell goes dark A very small amount of voltage is needed to run them so they are ideal for cells phones and other portable devices In colour LCD’s each pixel is divided into three sub pixels with red, blue or green filters By controlling the voltage applied to each sub pixel the sub pixel can range over 256 colours Phosphorescent Pigments: They absorb energy and keep this energy for some time after the energy source has gone They then release the energy later in the form of light They are NOW non-radioactive They can be incorporated into paints and inks to produce products which glow in the dark. They are used in such places as safety signs (exit signs) and wrist watches Electroluminescent Lighting: Converts electrical energy into light for luminescence It does this by applying a voltage across electrodes An organic phosphor is wedged between the two electrodes, the voltage rapidly charges the crystals The crystals then emit radiation in the form of light EL lighting has an extremely low power consumption Used in backlights for LCD displays Used in the form of paper thin wires, strips of panels They are waterproof, highly visible and extremely reliable www.edmonds.co.uk/electroluminescent-displays