CRT Full Form: The full form of CRT is Cathode Ray Tube. CRT is a special vacuum tube that creates an image when an electron beam hits a phosphorescent surface. CRT has wide applications in various electronic devices such as computers as most of the desktop computer screens use CRTs. Here we have explained everything about CRT including its features, functioning and applications. Read this article to know all about CRT and other information related to it. In addition, you can also check out our free General Awareness E-book- Download now for all competitive exams.
How do CRT works?
A cathode ray tube consists of some basic components as shown below. An electron gun creates a dart beam of electrons. Anodes accelerate electrons. Deflection coils generate an extremely low-frequency electromagnetic field that can constantly adjust the direction of the electron beam. There are two sets of deflection coils, horizontal and vertical. The electron beam creates a small, bright-looking spot when it hits a phosphor-coated screen. Complex signals are applied to deflection coils and a device that controls the intensity of the electron beam to create an image on the screen. This causes the dots to traverse the screen from right to left, top to bottom, in a series of horizontal lines called a grid. On a CRT, the spots move in a pattern similar to how your eyes move when reading a single column of text. However, scanning is so fast that you get a constant image across the screen. Only one electron gun is shown in the figure. This is typical of monochrome or single-color CRTs. Today, however, virtually all CRTs display color images. These devices have three electron guns, one for the red primary, one for the green primary, and one for the blue primary. A CRT, therefore, produces three overlapping images. One is red (R), green (G), and blue. This is often the so-called RGB color model.
Application of CRT
It is used as one of the most common displays on television. X-rays are delivered when fast-moving cathode beams abruptly stop. CRTs are used for cathode rays in oscilloscopes. CRTs are cheap. CRTs have fast response times and no moving artifacts.Features of CRT
- CRTs are large and heavy in physical size.
- Much better contrast ratio means details are visible even in dark images. It doesn't offer brighter white levels on LCDs, but it does.
- CRTs disappear from the market. Most manufacturers have discontinued production of his CRTs. Pretty cheap and very hard to find on the market.
- CRTs are easy to use as they use a 4:3 aspect ratio screen. Traditional TVs sometimes displayed black bars at the top and bottom of the screen. This means that the entire screen area cannot be used. LCD screens, by contrast, are much wider, meaning they have small bars or no bars at all
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What is the Full Form of CRT?
A cathode ray tube (CRT) is a special vacuum tube that creates an image when an electron beam hits a phosphorescent surface. Most desktop computer screens use CRTs. The CRT in a computer monitor is like a "picture tube" in a television receiver.
What are the application of CRT?
It is used as one of the most common displays on television. X-rays are delivered when fast-moving cathode beams abruptly stop. CRTs are used for cathode rays in oscilloscopes. CRTs are cheap. CRTs have fast response times and no moving artifacts.
What are the features of CRT?
Features of CRT
- CRTs are large and heavy in physical size.
- Much better contrast ratio means details are visible even in dark images. It doesn't offer brighter white levels on LCDs, but it does.
- CRTs disappear from the market. Most manufacturers have discontinued production of his CRTs. Pretty cheap and very hard to find on the market.
- CRTs are easy to use as they use a 4:3 aspect ratio screen. Traditional TVs sometimes displayed black bars at the top and bottom of the screen. This means that the entire screen area cannot be used. LCD screens, by contrast, are much wider, meaning they have small bars or no bars at all.