A monitor is an electronic output device, also known as a VDT (Video Display Terminal) or VDU (Video Display Unit). The purpose of the monitor is to get output from the system. We get a preview in the form of image, text, video, and graphics information via the computer’s video card. The resolution of a monitor is much higher than that of a television. The first computer was part of the Xerox Alto which was released in March 1973. Old monitors are heavy and large in size, and as a result, they cover more space on the desk. Nowadays, monitors are made with flat-panel display technology. New monitors take up less desk space as compared to older monitors.

Types of Display

CRT (Cathode Ray Tube)  Display


This technology was particularly old and popular between the 1990s and 2010. This technology is especially used in the manufacturing of television screens. A stream of very high-energy electrons is used to form images on a fluorescent screen. Basically, it is a vacuum tube containing an electron gun. This process is called thermionic emission and generates a strong beam of electrons. Electrons are propelled through a narrow channel by high-speed electro-magnetic devices.



There are several advantages to using CRT display, like…


Firstly, these monitors are highly efficient and capable of generating a resolution of up to 2048 x 1536 pixels. which provides very high-quality pictures. CRT monitors are capable of generating thousands of different colors. Second core advantage is that CRT monitors are cost-effective and affordable.



 LCD (Liquid Crystal Display)


Liquid crystal monitors are presently known as LCD monitors in the market. The structure of these monitors is very thin and works through a series of monochrome pixels. A liquid crystal display is also known as a liquid crystal diode. This is currently the most advanced technology on the market. LCD monitors are made up of two main layers. One layer is made up of colors, and the second layer is made up of monochrome pixels. These two layers are systematically arranged between a couple of transparent electrodes and two polarising filters.


At present, there are two types of LCD monitors available. The first is known as an active matrix, or TFT, and the second as a passive matrix. TFT-technology monitors are more secure and reliable. Passive monitors, on the other hand, have a slow response time and are becoming obsolete. The minimum resolution of this computer is 1280 x 720 pixels; the maximum is 3840 x 2160 pixels. Although LCD monitors are commonly used in the television industry, they are also found in a wide range of household appliances.


There are some advantages of LCD monitors, like…

This monitor can be hung on a wall due to its light weight.

They can produce clear and high-resolution images.

The best feature of this monitor is that, given its components, it does not require a lot of power.





This is one kind of LCD flat panel display, which stands for thin film transistors. The pixels of this monitor are controlled with the help of one to four transistors. These types of monitors provide high resolutions. This type of monitor is very expensive on the market. The monitor that uses TFT technology is known as an “active matrix display.” Passive LCD is quick but not quick enough to display fast-moving graphics. Engineers developed active LCD technology to address this slowness.



LED Display


The first LED monitor was invented by James P.Mitchell. SEF in Iowa released the first LED display prototype on March 18, 1978.. Surprisingly, this LED monitor prototype received awards from NASA and General Motors. Generally, LED, which stands for “light-emitting diode,” is the latest innovation in the market. These monitors have a slightly curved flat panel display and use light-emitting diodes. In general, gamers use these types of monitors to play high-graphics and HD games.


There are some advantages of LED monitors like…..

Includes a broader dimming range.

It is a more reliable and less expensive monitor.

Comparatively, it consumes little power and runs at a low temperature.

Surprisingly, LED monitors have less negative environmental impact when disposed of.


Comparison Between LCD and LED Display


LCD Monitors

LED Monitors

Energy star certifiedNOYES
Weight2.4 KG2.4 KG
Contrast Ratio12000000:1100000000:1
Brightness250 cd / m2250 cd / m2

OLED Display

OLED monitors stand for “organic light-emitting diode”. Surprisingly, it is composed of organic components such as carbon, plastic, wood, and polymers. Firstly, it is a new light-emitting display technology that is more efficient, brighter, and thinner than LCD displays. It is latest technology which used in the display of television, computer screens, game consoles and other various places. These LEDs are capable of producing millions of colors without any backlight. Nowadays, most laptops and monitors contain OLED displays.


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I'm Harikrushna Sangani, a software engineer and the face behind IT Tutorials Cloud. I'm passionate about all things tech and love sharing my knowledge with you through easy-to-follow tutorials and tips. Join me on IT Tutorials Cloud to level up your coding skills and stay updated on the latest in the tech world. Let's learn together! Harikrushna Sangani