The television picture invention

Now this method of picture creation is no longer used. Flat screens do not use retrace lines like CRTs need because each pixel is individually controlled.

Not to take away from Farnsworth's 1922 conceptualization, there's also John Logie Baird's 1926 first demonstration of working TV system, based on mechanical rotating disks. Farnsworth's "raster scan" system was superior. Raster scan displays predate Farnsworth; however Farnsworth gets credit for inventing a fully electronic raster scan system from camera to broadcast to display.

https://www.history.com/this-day-in-history/january-26/baird-demonstrates-tv#:~:text=On%20January%2026%2C%201926%2C%20John,demonstrated%20the%20first%20color%20television.

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P.S. Farnsworth invented a kind of electronic TV camera known as an "Image dissector." It was soon replaced by a better kind of camera known as an "iconoscope" which was then replaced by the "orthicon" which was replaced by the "vidicon tube." Each revision was simpler and/or more efficient/sensitive. These were eventually replaced by solid state TV cameras, beginning with the CCD camera.

1884 - First scanning-disc system invented, by Paul Gottlieb Nipkow (Germany). It describes the image in line form set by a single-turn spiral of holes in a rotating disc. Regarded as the primary patent precursor to television - so Farnsworth was effectively spotting something others had already realised.

1926 - World's first electro-mechanical TV, using the motor-driven Nipkow Disc scanner; by John Logie Baird, in Scotland.

His company went on to develop colour TV and the first viable colour picture "tube".

1927: April - AT&T achieved a 225-mile long, telephone-wire TV transmission between New York and Washington.

- May: Baird responded with a similar demonstration, now over 430 miles, London-Glasgow.


1928: Baird's company achieved the first trans-Atlantic TV transmission. Baird also demonstrated the world's first colour TV, using a Nipkow Disc with three sets of holes, one for each primary colour, and a collimator.

1929 - First BBC TV transmissions, though still of very low definition.

John Baird also seems to have been involved in early infra-red, opto-electronics; and possibly precussor radar research that for some reason has never been officially acknowledged. He devised a system that could detect objects but not calculate their range and 3D location.

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A 1930s film version of George Orwell's 1984 shows the two-way television on the wall of the central character's flat. Although obviously a scene "prop", it is clear by the continually-circling dot of light that the camera section is based on the Nipkow Disc scanner.

Nowadays, although audio only, we have 'Alexa' and her sisters.... for those gullible enough to buy them. In 1984 the surveillance was compulsory.

Sadly today they forced being bought out for the copyright rights.

Even actually paying extra to extend the copyright.

They started this practice in the 1970s.

In the 1920s and 30s a copyright could only be held for twenty eight years. Then it became public domain. After 1909 it changed from seven years.

RCA and all the other big corporations won out in the end.

AI generated

Thanks for BC

Now we spend hours infront of it.