How was the television john baird invented differ from the one in your home?

Answer 1

Baird's television was a somewhat primitive device when he first demonstrated it in 1925. Although it was an electronic system, it also required moving parts to create the image. With only a few lines making up the complete image, the resolution was barely sufficient to make out features on a face. It was monochrome of course - Color was still 30 years away at the time. The television housing was huge. The screen was tiny and it wasn't bright either.

Compared to modern televisions, his television came up short in every respect apart from one thing: 1925 was the year that people could first see live moving images. No one cared about the little deficiencies of image quality or brightness. This device exceeded their expectations by a mile. While we take for granted the high definition, full color, large and bright displays, Baird's television was a huge sensation. It was perhaps the biggest technological advance of the early 20th century. It paved the way for broadcasting and everything that we accept as the norm today has been based on that first demonstration.

For completeness, it is right to mention that Philo Farnsworth of America was the first person to demonstrate a fully electronic television system with no moving parts. That was first shown in 1929. Like Baird's television, Farnsworth's was also large, cumbersome, dim, poor resolution and had a tiny screen.

It was a few years later that Baird and Farnsworth worked together to improve television quality and start the journey towards the products we see today.
John Logi Baird, A scotsman demonstrated the first transmission system for full gray scale moving images in 1926. The first commercial televisions appeared in the late 1920s. They were an electro mechanical system and used a spinning disc to create the image. Despite the large size size of the cabinets, the image produced was tiny - typically about 3" x 2". The pictures were made up of 40 or 50 lines. The mid 1930s saw the first of the fully electronic televisions and by the end of the decade, screens as large as 14" were common. Although television was still experimental at this stage, the principle of of an image built up by a number of lines was firmly established. In this respect at least, modern televisions have changed little. By the 1950s, color television was launched in the US and in England and Germany some ten years later. The introduction of color was perhaps the biggest single advancement of television during the century. Stereo sound was introduced during the 1970's and screens increased in size with each new product release. The 21st century has seen resolutions increase to 1080 lines, far more than the 40 or so of the 1930s. In addition, telelvision production and broadcast has become digital, stereo sound has given way to multi channel sound. Although there has been a dramatic increase in quality, numbers of channels and facilities, those early pioneers of television in the 1920s and 1930s set out a broadcast format that has survived almost a century. Pictures of the early televisions can be see at http://www.tvhistory.tv/ along with a more detailed history fo the development of television.