What do you mean by Emissive display devices?
LED (Light Emitting Diodes), plasma panels, electroluminescent displays, and other devices transform electrical energy into light to produce a display. Flat CRT is a better variant of CRT in which electron beams are propelled parallel to the screen rather than perpendicular to the screen. They are then deflected by 90 degrees. Although such flat CRTs save space, they are not as popular as other emissive display systems.
