


-
Allen B. Du Mont created a CRT for practical and endurable television for the first time commercially.

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CRT called Vladimir Kosma Zworykin kinescope is invented.
- It was used for primeval television system.

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Karl Ferdinand Braun, a German invented the CRT oscilloscope.
- BBraun Tube was the origin of today¡¯s televisions and radar tube.
* Oscilloscope is an electronic display device, having CRT built-in.
: Osilloscope is a device that makes electronic signals viewable with the naked eyes

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Sir William Crookes, an english displayed the cathode ray with his invention, Crookes tube. By doing so, he proved the existence of cathode ray for the first time.
The Crookes tube was the origin for the coming cathode ray tube (CRT) afterward

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Julius Plucker, a Germany mathematician and physicist experimented on cathode ray. It was Julius Plucker who discovered the cathode ray for the first time.

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Heinrich Geissler, a German used a mercury pump and developed the Geissler tube. This was a successful vacuum tube for the first time and later on Sir William Crookes reorganized it.