In this article we are going to explain different types of display screens. “Display screen” means the display portion of a monitor. Most display screens work under the same principle as a TV, using a cathode ray tube (CRT). Consequently, the term “CRT” is often used in place of “display screen.”
Different Types of Display Screens
There are many types of display screens in modern electronics; some are imported, and basic display screens mostly are as follows.
- CRT Monitor
- Flat panel display
- Gas plasma Display
- CRT Monitor:
The CRT monitor is the most common type of display screen; it looks like a TV. It can display text & graphics.
Wording of CRT Monitor
It uses a cathode ray tube (CRT) to display a photo on the screen. A CRT consists of one or more guns that fire a beam of electrons into the inner screen.
The screen is coated with small phosphor dots from the inside. The beam of electrons repeatedly falls on the surface of the screen. Every beam-fall takes only a part of a second. CRT in color monitors consist of three guns. These guns create red, green, and blue (RGB) colors. The other colors are created with the combination of these three colors.
Flat panel display:
Flat-panel monitors take up less space and are lightweight. These monitors use much less power than CRTs.
Notebook computers, or laptop computers, use flat panel monitors. A flat panel display is made up of 2 plates of glass. These plates contain a substance betwixt them. The substance is activating in differential ways.
Types of technologies used in flat panel display screens:
Liquid Crystal Display:
This form of display screen contains a substance called liquid crystal (LC). The molecules of this substance line up in such a way that light behind the screens is blocked or allowed to create a photo.
Electro Luminescent Display:
This form of display screen contains a substance that shines when it is charged by electric current.
Gas Plasma Display:
This form of display screen is similar to a neon bulb. The display used a gas that emitted light in the presence of an electric current. It is very much expensive technology. It is not usually used.
Advantages of flat panel display:
These advantages of flat panel displays over CRTs are as follows:
- 1. It takes less desk space.
- 2. It uses less energy than a CRT monitor.
- 3. It uses liquid crystal technology.
- 4. It weighs less than CRT.
- 5. It is used for notebook computers, cellular phones, personal computers, and PDAs.
- 6. It does not emit harmful radiation.