The secret life of TV. How a TV works.
Posted: Saturday, April 04, 2009
by Connor Davidson
If like me, you like to take things apart to see how they work this is an article for you. Ever wondered how a TV works? Well here it is
A TV is split into two parts- the video and sound circuits and the TV tube. I will first explain the video and sound circuits. They appear similar to the below.
Aerial T uner- sound decoder- sound amplifier loudspeaker - Video decoder video amplifier TV Tube.
The TV tube is made of three parts screen, electron gun and deflection system. The electron gun fires tiny particles called electrons at the screen. The electrons hit little phosphor dots more dots better picture quality and produce colour dependant on the numbers of electrons and the dots that they hit. The deflection system simply aims the electrons to hit the correct dots to produce the desired picture.
The TV can only work because of a thing called persistence of vision. Persistence of vision means that we remember a picture for longer than the time for a new one to appear. Our brain remembers an image for 1/25 of a second, whereas a new picture is produced every 1/10 of a second.
Now, we have seen into the secret life of a TV lets look at our TV differently from now on. The TV is quite amazing.
P.S. The TV was a British invention; invented first by John Baird.
Connor Davidson 4/03/09
Connor Davidson is a UK based writer. He writes on wide variety of topics with his main interest being science, maths and engineering.
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Feel free to reprint these articles on your website by using the reprint button. If you have any questions or comments please post them below - I read all comments.
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Top-level comments on this article: (8 total)If you want to be picky, it was a Scottish invention.Nice article!Yes it was. However, Scotland is technically part of the UK.Thanks for the comment.
Connor,Now, if only someone could explain electricity to me...thanks and good article.NancyElectricity is simply the flow of charged particles.Thanks for the comment.Yes, Connor,But I don't get the particles -- I can't see them. It becomes too complex. Something along the line of infinity or the binary programming of 0's and 1's.Thanks,NancyWhen you get into the "nitty gritty" it all becomes so complex.
Always wanted to know how a t.v. worked but thought it would be way over my head. Your article was concise and easy to understand. Thanks.Good. That was what I was trying to do.Thanks.
Great article and well-written. I not much of a taker-aparter myself, but this was interesting. Thanks for sharing.SandraThank you for commenting.
Although the content was good. I am not a technology buff. I really don't care how a TV works. I just want it to work.OK.Thanks for the comment.
I am glad that you went thru the trouble because that is something I wouldn't tackle.I have studied the sciences for over 10 years so I thought I should share my knowledge.Thanks for the comment.
Must be a guy thing, wanting to know how things are put together and how they work. My husband is just fascinated with a site called how things work. I enjoyed you article very much. A simplified version that even I could understand. Thank you for sharing.Linda DI love that site!Thanks for the comment.
Interesting, Connor. I still don't understand it - my mind doesn't wrap around things like that, but persistence of vision makes sense.Thanks for the comment.
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