In this way, a condenser forms between the core (Ecuador) and the inside of the tube, the glass acts as a dielectric. Outside, in the hood area, it is covered with black paint, ACUADAC, which is the center of the CRT. Inside the hood is the anode, which attracts electrons produced at the cathode and collapses at high speed against the phosphor-coated screen, which, when shot by the electrodes, produces equally bright light to create images. On the neck, we find the filament as the first component responsible for the heating of the second component, the cathode, then the control grid (G1), the display grid (G2) and finally the Focus (G3), which are generally called focal, all of which have the special function of accelerating the electron beam, thus, it reaches the surface of the phosphor where the spotlighting on the CRT screen is produced. CRT ComponentsĬRT neck, headline, the screen is divided. Weinhart from the Western Electric Society.

The first version using the hot cathode was developed by J. This tube is sometimes called the Braun tube. The first version of the cathode ray tube was a cold-cathode diode, actually, it is a kind of phosphor coating in front of the Crookes tube. The cathode ray tube or CRT monitor was developed in 1897 by a German scientist, Karl Ferdinand Braun, but was not used until the creation of the first televisions in the late 1940s.Īlthough they have many modifications that allow CRTs used in modern monitors to improve image quality, they still use the same basic principles.

The brightness can be changed by changing the intensity of the electron beam by using a control grid whose action is similar to a triode or other valves such as tetrode or pentode. Unlike the magnetic deflection system used on television, oscilloscopes use electrostatic deflection and deflect the electron beam using horizontal and vertical squares placed inside the tube. In other words, the kinetic energy of the electron beam is converted into light energy by transferring it to the screen material.īetween the electronic ball and the sieve, there is a deflection system consisting of coils placed outside the pipe to deflect the electronic beam horizontally and vertically. In the cathode ray tube, an electronic ball produces and limits an electron beam that it sends towards a screen covered with luminescent material so that when the electrons collide, it emits light whose intensity or brightness is proportional to the amount and speed of the event electrons.

Cathode ray tube monitors