Grade 9 computer

Wednesday, September 20, 2006

MONITORS

All desktops use monitors and they are either LCD or CRT.

LCD stands for liquid crystal display. CRT stands for Cathode Ray Tube.
LCD definition=Liquid Crystal Display. A display that consists of two polarizing transparent panels and a liquid crystal surface sandwiched in between. Voltage is applied to certain areas, causing the crystal to turn dark. A light source behind the panel transmits through transparent crystals and is mostly blocked by dark crystals.

CRT definition=Cathode Ray Tube. A vacuum tube that produces light when energize by the electron beam generated inside the tube. A CRT has a heated cathode and grids in the neck of the tube, making up the "gun". Electrons are accelerated from the gun toward the front surface of the tube (screen), producing a beam. The surface on the back of the screen is coated with phosphors that light up when struck by the electron beam. ...

Will be updated in couple of hours.

0 Comments:

Post a Comment

<< Home