What is CRT TV? Principle of operation, advantages and disadvantages of CRT . TVs

CRT (Cathode ray tube) TV is a type of television with a screen that operates on the principle of an electron beam launcher, so it is often named “CRT type”. Join lassho.edu.vn to learn about CRT TVs and the operating principles, advantages and disadvantages of CRT TVs!

What is CRT TV?

CRT TV can be considered as the oldest TV screen technology , is a type of television with a screen that works on the principle of an electron beam launcher, so it is often named “CRT type”.

CRT screen uses a fluorescent screen part used to display pixels , in order for the pixels to glow in the correct color to be displayed, it is necessary that electron rays affect them to create light emission. The CRT tube generates electron beams that strike the fluorescent screen to display the desired pixels.

Working principle

– CRT TV is essentially a vacuum electronic lamp system. In which it uses one (black and white television) or three (color television) electron gun (cathode ray firing) and a phosphor screen.

– To display the image, the electron gun will shoot cathode rays (electrons) at the phosphor screen to stimulate them to glow. Depending on the color you want to display, electrons can be accelerated or redirected during the firing process from the gun (through the vacuum layer) to the phosphor screen.

Structure of the cathode ray tube:

1) Three electron guns (for red, green, and blue using phosphorus).

2) Electron beam.

3) Concentrator coil.

4) Deflector coil.

5) Connect the anode.

6) Mask to separate the beam into the red, green, and blue parts of the displayed image.

7) Phosphorus layer with red, green, and blue areas.

8) Close-up of the screen’s interior with phosphor coating.

More specifically for color televisions, CRT technology usually uses 3 types of Phosphor, each capable of emitting one of 3 primary colors (red, green, blue) when excited by cathode rays. The color you see in the end is also a combination of these 3 primary colors .

Advantages and disadvantages of CRT . TVs

CRT TV is said to be the world’s first image presentation technology, so it has more limitations than LCD TVs, LED TVs or plasma TVs, modern OLED TVs born later. Here are the advantages and disadvantages of CRT televisions.

Advantage:

• The price is cheaper than other monitors.
• For extremely true color quality, good contrast, so it is often used in engineering and design people.
• High screen durability.

Defect:

• Low resolution.
• Heavier and thicker than LCD, LED or plasma TVs of the same size.
• CRT TVs consume a lot of electricity.
• Poor reception.

Despite many limitations, CRT televisions are still trusted by many families because of their low cost and ease of use.

Above is some information about CRT TVs, if you have more ideas or additions, you can leave a comment below!