Vacuum fluorescent display, also called VFD, is a display device. It has many advantages. It can emite a strong bright light with high contrast and support display elements of various colours. It is rugged, inexpensive, and easily configured to display a wide variety of customized messages. Moreover, this product can display seven-segment numerals, multi-segment alpha-numeric characters or can be made in a dot-matrix to display different alphanumeric characters and symbols. Without limitation by the response of rearranging liquid crystals, it can function normally in sub-zero temperatures and ideal for outdoor devices in cold climates. Vacuum fluorescent display is composed of a vacuum envelope with a front glass and the base plate, in which cathode (filament), grid and anode are formed as the basic electrodes. It has ended up being used primarily in equipment powered by an AC supply or heavy-duty rechargeable batteries. The display is commonly used on consumer-electronics equipment such as video cassette recorders, car radios, and microwave ovens.