write the technology used in emissive and non emissive display with examples of both these two categories.
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Emissive displays: The image is produced directly on the screen.
Phosphors convert electron beams or UV light into visible light. E.g.: LED (Light Emitting Diode Displays), CRT(Cathode Ray Tube), OLED (Organic Light Emitting Diode), SED (Surface-conduction Electron-emitter displays), PDP(Plasma Display Panel), ECD (Electrochemical Display), ELD (Electroluminescent Displays), VFD (Vacuum Fluorescent Display), FED(Field emmision Display).
Non-emissive displays: Light is produced behind the screen and the image is formed by filtering this light. E.g.: LC-Displays (LCD)
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