| Does 100Hz or 200Hz improve the picture on Plasma or LCD Tv? | | Print | |
| Written by Armadeus Cornelius | ||||||
| Tuesday, 11 November 2008 | ||||||
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Introduction
Introduction Ordinarily PAL televisions will refresh the picture with a frequency of 50 Frames Per Second (FPS).The Frames Per Second (FPS) are the number of frames required to generate the illusion of motion. On a 50 FPS (50Hz) Cathode Ray Television (CRT), due to the picture being produced with an electron scan, there is a visible flicker that is seen by the human eye. The Human eye is at occasionally sensitive to this frequency depending on the intensity of darkness, the speed of the image, and the degree of brightness thus you will occasionally notice the picture flicker on a 50Hz TV. The flicker becomes more apparent on larger screen. Early 100 hertz technology A 100 hz TV operates at twice the Frames Per Second (100FPS) by producing a replica of every frame and inserting it after the previous one. The result of this doubling of the scan frequency to 100Hz and inserting a copy frame is that this problem was eliminated as far as the eye perceived it. The result of this is to significantly lower the flicker. 100hz on LCD and Plasma tv's Plasma and LCD TVs dont have flickering as they dont generate the picture with an electron scan. But LCD TVs are still able to benefit from 100Hz since cpmplex digital circuitry creates a middle image or an extra frame. The TV does this by creating an further frame by means of complex interpolation along with motion compensation calculations to work out what the addition frames and fields look like instead of inserting a copy frame. Therfore the first and second frames are different. However even at 100 FPS the picture still does not deliver a entirely smooth picture particularly with fast motion images. Some television manufactures attempt to reduce this further by employing digital picture processing. Typically there is still a little blurring on quick moving images but the benefits are clearer and better-defined surfaces, sharper pictures, and smoother movement than is possible from 50 Frames Per Second Plasma and LCD televisions. i.e. if a football moves ten pixels from right to left between frames one, two and three, the 100 Frames Per Second television will digitally create two added frames between one and two, along with two and three, in which the ball will travel five pixels. This therefore results in a total of five frames in which the ball moves a total of ten pixels i.e. the original frames one, two and three plus the digitally created frames that are inserted in between one and two, and between two and three. The eye thus sees a picture that moves more fluidly than before. 100 hz is a benefit The benefit is that 100Hz televisions have a clear benefit of ending a lot of the ghosting effects sometimes seen in LCD TV's. The ghosting effect caused by the new image being displayed before the previous has faded away. The created middle frame also benefits the Plasma television picture by make the picture more fluid and natural. Most leading manufactures have now got 100Hz LCD and Plasma televisions including Panasonic, JVC, Samsung, Toshiba, Sony, Philips, LG, Pioneer, and Hitachi. Sony lead the way into 200Hz A range of 200hz TVs have been produced by Sony which digitally inserts three further frames between the original 50Hz frames. Hence speedy moving sequences are delivered with a more fluid, sharper and smoother picture than 50 hertz or even 100 hertz TVs. The added benefit for people with photosensitive epilepsy Studies have shown that 100Hz televisions can help prevent seizures in patients with photosensitive epilepsies when viewing television or playing video games. Article Author: Armadeus Cornelius is an authority on electrical goods with almost 20 years experience. For more information on the models available go to lcd and plasma Tv with 100hz and 200hz. Go to the following link if you are interested in any electrical goods at discount prices.
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| Last Updated ( Saturday, 21 August 2010 ) | ||||||
