There are two types of display screens.
1- CRT Monitor
2- Flat Panel Monitors
CRT Monitor
CRT Monitor is the most common form of display screen. It looks like a television. It can display text and graphics. Its uses a cathode ray tube (CRT). CRT tube creates an image on the screen by an electronic beam. CRT consists of one or more guns that fire a beam of electrons inside the screen. The screen is coated with very tiny phosphorous from inside. The beam of electrons repeatedly falls on the surface of screen. Every beam-fall takes only a fraction of a second. CRT in color monitors consists of three guns. These guns generated red, green and blue (RGB) colors. The other colors are generated with the combination of theses three colors.
Flat Panel Monitors
Flat-Panel Monitors take less space and are lightweight. These monitors use much less power than CRTs. Notebook computers use flat panel monitors. Flat panel display is made up of two plates of glass. These plates contain a substance between them. The substance is activated in different ways.
There are three types of technologies used in flat panel display screens.
I-LID CRYSTAL DISPLAY or LCD:- This type of display screen contains a substance called liquid crystal. The molecules of this substance line up in such a way that the light behind the screens blocked or allowed to create an image.
II- ELEXTRO LUMINESCENT DISPLAY OR ELD:- This type of display screen contains a substance that glows when it is charged by electric current.
III-GAS PLASMA DISPLAY:- This type of display screen is similar to neon bulb. The display uses a gas that emits light in the presence of an electric current. It is more expensive technology. It is not commonly used.
1- CRT Monitor
2- Flat Panel Monitors
CRT Monitor
CRT Monitor is the most common form of display screen. It looks like a television. It can display text and graphics. Its uses a cathode ray tube (CRT). CRT tube creates an image on the screen by an electronic beam. CRT consists of one or more guns that fire a beam of electrons inside the screen. The screen is coated with very tiny phosphorous from inside. The beam of electrons repeatedly falls on the surface of screen. Every beam-fall takes only a fraction of a second. CRT in color monitors consists of three guns. These guns generated red, green and blue (RGB) colors. The other colors are generated with the combination of theses three colors.
Flat Panel Monitors
Flat-Panel Monitors take less space and are lightweight. These monitors use much less power than CRTs. Notebook computers use flat panel monitors. Flat panel display is made up of two plates of glass. These plates contain a substance between them. The substance is activated in different ways.
There are three types of technologies used in flat panel display screens.
I-LID CRYSTAL DISPLAY or LCD:- This type of display screen contains a substance called liquid crystal. The molecules of this substance line up in such a way that the light behind the screens blocked or allowed to create an image.
II- ELEXTRO LUMINESCENT DISPLAY OR ELD:- This type of display screen contains a substance that glows when it is charged by electric current.
III-GAS PLASMA DISPLAY:- This type of display screen is similar to neon bulb. The display uses a gas that emits light in the presence of an electric current. It is more expensive technology. It is not commonly used.