CRT Full Form

CRT full form is Cathode Ray Tube. It is a vacuum tube by which a projector known as fluorescent creates trajectories of electron beams deflected by an induced magnetic and electric field and in order to produce the visible image, a cathode ray tube helps in converting an electrical signal.

What is the full form of CRT?

As mentioned above the full form of CRT is a Cathode Ray tube which is a specialized tube by which images are produced when an electron beam strikes a surface made of phosphorescent. Mostly desktop displays use CRT.  The cathode ray tube's purpose is to convert an electrical signal into a visual image. The rays are simple to generate and electrons orbit each atom and travel as electric current from one atom to another atom.

 How does CRT work?

Inside CRT electrons are accelerated with the help of an electric field from one end to the other end of the tube. Once the electrons reach the end of the tube due to velocity they lose all their energy and they come to a stable condition that is converted into other forms like heat. Thus, a minimal amount of heat is transferred into X-rays. An electric beam in the display travels around the display, lights up and projects onto the display. The color shown on display is created by green, blue and red lights. Popularly known as RGB. The working of CRT completely depends on the movement of electron beams. The electron helps in generating strong focused electrons which move at very high velocity and high voltage. At the time when a high-velocity electron beam strikes on a screen made of fluorescent spots are generated. As soon as the beam exits the gun, it passes through multiple pairs of electrostatic deflection plates. All the working parts of CRT are packed with the help of a vacuum glass envelope in a way that emits electrons which can move freely from one end to the other inside the tube.

What are the basic parts of CRT?

The following are the basic parts included in CRT:

1. Electron Gun: It helps in generating a stream of electrons
2. Anodes: It accelerates the electrons
3. Vertical and Horizontal Deflection Panels: The panels are responsible to develop a low frequency of electromagnetic field which helps in the modification in the regulation of electron beams.
4. Fluorescent display: It is made with phosphor. It helps in generating light at the time the light strikes upon it.
5. Evacuated Glass Envelope: It assembles and carries CRT

CRT History

• Cathode rays were discovered by Johann Wilhelm and Julius Plucker
• CRT was first developed by Ferdinand Braun
• In the year 1934 first CRT TV was made by Telefunken

CRT Features

The below mentioned are some important features of Cathode Ray Tube:

• It is considered as large and heavy in weight
• It has a powerful contrast ratio which helps in providing clear information in dark images
• It is low in price
• It has a quick response time
• They provide a better contrast ratio
• It is user-friendly

CRT Characteristics

• Size: CRTs are larger and bulky in nature
• Contrast: They provide better contrast than LCD
• ShadowMask: It is a screen with thin metal along with tiny holes
• Aperturegrill: It contains tiny vertical wires. The electron beams passes through the grill which results in illuminating the phosphor on the faceplate
• SlotMask: It uses a combination of technologies which includes shadow mask and aperture grill.
• Cost: They are inexpensive
• User-friendly: They are considered easy to use

 CRT Applications

• Mainly used in TV displays
• Used in X- rays
• It is also found in oscilloscopes made by cathode ray
• Used mostly as a display device in radars

CRT Limitations

• Displays images with fewer pixels
• Consumes High power
• They are big and bulky
• Bright as compared to LCD
•  It is dependent on the size