"They have eyes but they cannot see. They have ears but they cannot hear. They have hearts but they cannot understand"
Saturday, 3 December 2011
Television Picture Tube
Television Picture Tube
A color television picture tube
contains three electron guns, one corresponding to each of the three primary
colors of light—red, green, and blue. Electromagnets direct the beams of
electrons emerging from these guns to continuously scan the screen. As the
electrons strike red, green, and blue phosphor dots on the screen, they make the
dots glow. A screen with holes in it, called a shadowmask, ensures that each
electron beam only strikes phosphor dots of its corresponding color. The glow of
all the dots together forms the television picture.
No comments:
Post a Comment