Refresh cathode ray tube
Elucidate the term refresh cathode ray tube? Briefly elucidate it?
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a) The beam of electrons, emitted by the electron gun, passes via focusing and deflection systems which direct the beam in the direction of specified places on the phosphor coated region.
b) The phosphor which emits a small spot of light at each and every position contacted by electron beam.
c) One method to keep phosphor glowing is to re-draw the picture continually by rapidly directing the electron beam back over the similar points.
d) This kind of display is termed as refresh CRT.
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