Liquid crystal display device is commonly known as LCD. It is a liquid crystalline material squeezed in between two glass or plastic plates. The front plate contains coating of this film and is transparent and conductive. The back plate is reflective. Its segments are in the shape of desired characters. On the back plate an […]

A CRT (Cathode ray tube) display unit is a commonly used output device. The VDT (Visual Display Terminal) unit contains CRT for visual display unit displays the data and information received from the computer in alphanumeric characters and graphs. CRT being an output device can also perform limited input function when used in conjunction with […]