What is CRT Monitor? – Everything You Need to Know

What is CRT Monitor?: IN a CRT, or cathode ray tube, the monitor uses electrons to transfer images from a program source (probably a computer or antenna). 

CRT monitors are both heavy and robust, but they were the types of monitors that were associated with desktop computers for much of the 1980s and 1990s until the flat panel revolution.

How Does it Work

A CRT monitor has a cathode ray tube on the back. Electricity causes the cathode ray to release electrons, which accelerate and hit the screen. 

As electrons collide with the screen, which is often made with phosphor, the screen fluoresces to create an image.

The interaction between the electrons and the phosphor generates three colors: red, green, and blue. 

The CRT monitor uses these colors in different combinations to form all the other necessary colors. This is why the monitor cable that connects to the computer is sometimes called the RGB cable.

The CRT monitor uses information sent from the computer to create images one by one, essentially “refreshing” the screen a certain number of times per second. 

The higher the number of refreshments the screen makes per second, the smoother the images on the screen. A low refresh rate causes the flickering effect commonly seen on old CRT best monitors and televisions.

Size of CRT Monitor

CRT monitors often vary in screen sizes ranging from 15 to 21 inches (37.5 to 52.5 cm). While larger sizes are possible, it would become impractical for a desktop due to the net robustness of the larger monitors. 

The appraised size is slightly misleading as the size is measured to include the monitor frame.


CRTs are often thought of as obsolete in the presence of liquid crystal displays (LCDs) or plasma monitors. 

However, CRTs often produce sharper and clearer images than newer technologies since CRTs can achieve higher resolution. 

The reasons for replacing CRTs with flat-panel monitors are that flat-panel monitors save space and energy, while significantly reducing radiation.


CRTs create better contrast and are less expensive than flat panel technology in monitors, but they are also more robust and heavier than LCDs

LCDs consume roughly half to two-thirds of the power of a CRT monitor. While the negative health effects of CRT radiation (which is mostly electromagnetic) have not been substantiated, always use extreme caution when dealing with radiation exposure.

Future of CRT Monitor

Traditional CRT monitors are no longer able to compete with LCD or plasma monitors, but there is talk of the development of flat panel CRTs, which will not be as robust as old models. 

The ultimate goal of monitor technology is to build the cheapest and thinnest model that still delivers a quality picture. However, there are still many applications for CRT monitors.

 Games with high motion graphics work better on CRT monitors than LCDs since they may have motion blur or pixelation problems. 

Additionally, graphic designers rely on things like accurate color reproduction and high contrast rates, which are better on CRT monitors.

However, in the long run, the number of CRTs that are discontinued continues to increase. The EPA identified used computer equipment as one of the fastest-growing waste problems in America. 

This raises the problem of how to pull the monitors. In some cases, companies like IBM will buy back the monitors. 

Also, pay-per-monitor recyclers and the government offers free recycling programs. Another option is to donate the monitors to various charities in search of computer equipment.

Types of CRT

There are many types of monitors. CRT monitors are generally of two types:

  • Monochrome CRTs
  • Color CRTs

Other Types of CRT

In addition to the above two types, there are several other types of CRT monitors.

  • Projection CRTs
  • Beam-index tube
  • Flat CRTs
  • Radar CRTs
  • Oscilloscope CRTs

Read Here: Best Portable Monitor for MacBook Pro.

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