What produces the light to make images on a television?

Cathode Ray Tube

Light is produced when electrons emitted from the back of the tube strike the front of the screen,and light up the phosphor coating .

Plasma

Excitation of a gas by high voltage

LCD

Cold cathode florescent lamps, placed behind the LCD screen

LCD LED

White LED's placed behind the LCD screen

OLED

Light emitting diodes. Light is generated by passing current across a PN junction of specially doped material, which causes electrons to change valence level and emit light.