Question: When were the first screens developped?

Everytime I read about the history of radar in England and Germany in the 30s and 40s, I wonder how they managed it to visualize the measurements of the radar. I mean did they have the technology to transfer the datas from the radar to the screens (television screens existed in that time.

Can somebody answer my question?
 

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I second that question. I know that first displays were oscilloscopes, and that the Chain Home was at least partially operated by sound, but I would like to know more.
 
The first person to create a device to hook up a deflectable cathode ray tube with a phosphor screen to display shapes and images was either K. Ferdinand Braun in 1897 or Boris Rosing in 1907, depending on precise definitions and whether you're taking to Germans or Russians.

Earlier devices had included deflected cathode rays, and cathode rays and phosphor screens, since the 1850s, but these were the first unambiguously controllable image-making machines.

By the 1920s, commercially available oscilloscopes employed CRTs for display (earlier oscilloscopes had used pens or pencils at the end of rods that were deflected up and down on paper that rolled by at a constant rate).

The first device generally called a television was made in Germany in the early 1930s.

I can't speak to radars specifically, but the technology certainly existed.
 
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