Explain refresh cathode ray tube

Question

Explain refresh cathode ray tube?

Answer 1

♦ A beam of electrons, emitted by an electron gun, passes through focusing and deflection systems that direct the beam toward specified positions on the phosphor coated area.

♦ The phosphor that emits a small spot of light at each position contacted by the electron beam.

♦ One way to keep phosphor glowing is to redraw the picture repeatedly by quickly directing the electron beam back over the same points

♦ This type of display is called is called refresh CRT

♦ Primary components of electron gun