Another big reason was that they could be flat. The big companies starting use LCDs in computer and television screens as after much development the image quality was deemed to be sharper. This stands for light crystal display, and this competitor soon began to take a lot of attention away from the CRTs. LCDĪfter 2000, television sets began to be produced with LCD screens. It was an invention that was providing entertainment and information to people all across the globe, but at the turn of the millennium, it all changed.
With the birth of computers came the need for screens, and the CRT was widely used across computer screens all over the world. Over the following decades, the big names of electrics joined in, with brands such as Sony and Panasonic bringing out their own line of CRT televisions. Images became quicker to load, and in 1954, electrics powerhouse RCA began to produce a coloured version.
The cathode ray tubes changed in shape from rectangular to circle and grew in size and power. Televisions began to be produced on a huge scale, as well as early video games. The Rise of the CRT TVįrom the mid-1930s onwards, the CRT began to rise in prominence.
The CRT television was born, and now all that was left to do was make it stronger. Over time the process sped up, to the point where it was unnoticeable. This was how the images were produced, in a gradual and methodical way. If looking in slow motion at a CRT television, you would notice the lines begin at the top of the screen, and work their way down from left to right. Less than a decade on from when he produced an image of a letter, in 1935, Takanayagi had invented the first electronic television set. Another year later he was able to create images such as faces. The resolution was 40 lines, but a year later this had increased to 100. It was a letter similar to the British T but was actually the first letter of the old Japanese alphabet. In 1926, Takanayagi used an electronic CRT to create a symbol. Dubbed ‘the father of television’, Kenjiro Takanayagi is credited with being the creator of the first CRT television. The next step was to get it working, and this took place in Japan. Compared to cold cathodes which had previously been used, this essentially meant less power was needed, and more power was emitted. This meant that a cathode was heated electrically, and used thermionic emissions to fire electrons. In 1922, two engineers at Western Electrics began to use hot cathodes in a CRT. Into the 20 th century, the whole world began to know about the tube, and this led to further experimentation on just what the capabilities of this device were. This was the first CRT that was made to present images on a screen and paved the way for the future uses of such a device.įrom Braun’s initial invention, the CRT continued to evolve. In 1897, he created what he called ‘the Braun tube’. Karl Ferdinand Braun was another German physicist who carried also a keen interest in engineering. Other names who were paramount in the origin of the CRT were Arthur Schuster and William Crookes, who further developed Plucker and Hittorf’s work into how magnetic and electric fields could change the direction of the electron beam. A cathode is a negatively charged electrode, and it was when luminous shapes started to emerge inside a tube containing one, that the cathode ray was found.īy moving a magnet near the tube, Plucker found he could manipulate the rays, and the idea of using rays to produce images first became a possibility. Two German physicists by the names of Johan Wilhelm Hittorf and Julius Plucker are given credit for first spotting rays being shot from a cathode. Many different figures feature in the origin of the CRT.įirst came the discovery of the cathode ray. When this is manipulated, the beams that are emitted from the gun create different images when connecting with the phosphorescent screen, thus an image appears on your computer or television screen.īut how did this come to be? And how did something so technical end up inside television screens across the land? Before the birth of LED and LCD television screens, most of the TVs around used CRTs to function. If you think this sounds like something from a sci-fi novel, then you’re wrong, as most people probably have cathode ray tubes in objects around their home. When the beams hit the surface, which is often phosphorescent, the beam becomes visible. In a nutshell, it is an gun that fires electrons onto a surface. For most people, the cathode ray tube (CRT) may sound like an alien object.
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