A standard PAL television will refresh the picture at a frequency of 50Hz.The Frames Per Second (FPS) are the quantity of frames required to give rise to the illusion of motion. Our eyes are at times sensitive to this frequency depending on the speed of the moving image, the level of darkness, and the amount of brightness as a result you will at times notice the picture flicker on a 50Hz TV. Additionally the larger the screen is the more apparent the flicker is.
A 100hz (100 FPS) TV operates at twice the Frequency by creating a copyof each frame and inserting it after the one before. On a 50 FPS (50Hz) Cathode Ray Television (CRT) because the picture was created by an electron scan there is a visible flicker that could be detected by the human eye. By doubling the scan frequency to 100 Frames Per Second and inserting a duplicate frame this problem was not apparent as far as the human eye is concerned. The result of this is to appreciably cut down the flicker.
LCD and Plasma televisions don't have flickering as they don't create the picture with a scan. Nonetheless LCD TVs still benefit from 100FPS for the reason that advanced digital circuitry creates an extra frame or middle image. This is done by the Television creating an additional frame by means of complicated interpolation as well as motion compensation calculations to work out what the extra fields and frames look like instead than inserting a duplicate frame. (e.g. the first and secon frames are different).
Nonetheless even at 100 FPS the picture produced is still not a entirely smooth picture especially with fast motion images. A number of TV producers attempt to reduce this further by using digital picture processing. In reality there is still some blurring on quick moving images but the benefits are clearer and better-defined surfaces, smoother movement, and sharper pictures than you get from 50 Frames Per Second Plasma and LCDtelevisions.
eg if a football travels ten pixels from left to right between frames one, two and three, the 100 Frames Per Second TV will digitally make two extra frames between one and two, and two and three, in which the ball will travel five pixels. This results in a total of five frames in which the football travels a total of ten pixels i.e. the original frames one, two and three plus the digitally created frames inserted in between one and two, and in between two and three. The consequence of this is that the eye sees an picture that moves more fluidly than beforehand.
100Hz TVs have a clear benefit of eliminating the majority ghosting artifacts every so often seen in LCD TVs. The ghosting artifact caused by the new image being displayed before the previous one has faded away.
Sony has just launched a 200 hertz range that digitally inserts three further frames between the original 50 hertz frames. As a consequence high-speed moving scenes are delivered with a more fluid, sharper and smoother picture than 50Hz or even 100 hertz TV's. MORE DETAILS
The majority of manufacturers have now got 100 hertz LCD and Plasma TVs including Panasonic, JVC, Samsung, Toshiba, Philips, LG, Sony,Hitachi and Pioneer . For further advise and discount pricing CLICK HERE
Studies has show that 100Hz televisions can assist in preventing seizures in people who suffer with photosensitive epilepsies when watching television or playing computer games.
Colin Young has almost 20 years in the consumer electronics industry retailing electrical goods. With the knowledge and experience acquired he is writting blogs that try to explain new technology so that you can make purchasing decisions with an understanading of what you are buying. For more information go to Consumer Electronics Advice or Cheaper Televisions
Interesting article, Neil. I am planning to purchase a new Plasma or LCD TV and I'll keep this info in mind. I'll be looking for that new Sony. Thanks for sharing.
A really good article. Thanks for passing on your knowledge especially as the home entertainment area is increasingly full of sales people who have no idea what they are talking about. I can now justify that 200hz tv!
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