Cathode Ray Tube Technology (CRT)
CRT is an analog device that is used by a digital device - computer. The interface between these two devices is described. The major components of CRT are given below :
Electron Gun
This generates a narrow beam of electrons (cathode rays) which passes through the focusing and deflection systems.
Focusing System
It produces a non-blurred picture by focusing the electrons of the cathode ray into a narrow beam.
Deflection System
Deflection directs the beam towards specified positions on the phosphor-coated screen.
Phosphor-coated Screen
This screen emits a small spot of light at each position contacted by the cathode ray.