VFD is a display device that uses vacuum triode tube technology. The phosphor is patterned on the anode in a vacuum package. Electrons come into collision with the phosphor to emit a very bright light with high contrast that can support display elements of various colors. Robust, reliable and inexpensive. These are several advantages of VFD over other kinds of displays like LCD and LED. VFDs can also function in extreme temperatures and provide wide viewing angles and excellent readability. Because of these features, VFDs are used in automotive applications such as car audio, instrument panels, odometers, gear selectors and air conditioners. VFDs are the preferred display for audio and visual systems, microwave ovens and other home applications.