CRT Full Form

The full form of CRT is Cathode Ray Tube. It is a vaccum tube that has a fluorescent projector installed in it, that produces a trace of an electron beam, deflected by induced magnetic and electric fields. Cathode ray tubes find their application in converting an electrical signal into a visual image. Cathode rays or electron particle beams are very easy to generate and electrons orbit each atom and travel as electric current from the atom to atom.

Working of Cathode Ray Tube

Inside a cathode ray tube, electrons are accelerated with the help of an electric field from one end of the tube to the other. When the electrons reach the far end of the tube, by their velocity, they lose all the energy they had at the beginning and this is converted into other forms of energy like heat. A certain amount of heat is transferred into X-rays as well.

The working of CRT depends upon the movement of electron beams. The electron guns generate sharply focused electrons which move at a very high velocity and high voltage. When this high-velocity electron beam strikes on the fluorescent screen luminous spots are created. After the beam exits the electron gun, it passes through the pairs of electrostatic deflection plates. These plates deflect the beams when the voltage is applied across them. The first pair of plates move the beam upwards and the second pair moves the beam from one side to another. The horizontal and vertical movements of the electron are independent of each other, and hence the electron beam is positioned anywhere on the fluorescent screen.

The working parts of a CRT are packed in a vacuum glass envelope in such a way that the emitted electron can move freely from one end of the tube to the other.

Basic Parts of Cathode Ray Tube

1. Electron Gun Assembly – The electron gun assembly generates a beam of electrons.

2. Anodes – The anodes accelerate the electrons.

3. Deflection Plate Assembly – It consists of vertical and Horizontal Deflection panels. These panels produce a low-frequency electromagnetic field that is required to modify the regulation of electron beams.

4. Fluorescent Display – The fluorescent screen is made of phosphorus. It converts electrical energy into light energy when the beam strikes upon it.

5. Evacuated Glass Envelope – An evacuated glass envelope keeps the entire Cathode ray tube intact. It acts as housing for all the parts of CRT.

Applications of CRT

• It is widely used as a common display on television sets.

• Used for generating X-rays when the fast-moving cathode rays are suddenly stopped.

• CRT is also used in oscilloscope cathode rays.

Limitations of CRT

• CRT display tech is dependent on size.

• CRT shows images with fewer pixel densities.

• The power consumption of CRT is relatively higher.

• They are big, massive, and bulky in size.

• LCDs are comparatively brighter than CRT.

Conclusion

It is understandable from above that the full meaning of CRT is Cathode Ray Tube. Additionally, it can also be understood that there are several benefits of CRTs that have put it in a more advantageous position than other similar products. These pros have together contributed to the large scale use of CRTs in the present era.