When you're shopping for a light-emitting diode TV, or LED TV, separating the important statistics from the marketing ploys can help you minimize the amount of money that you spend. The refresh rate of the LED TV is often advertised as an important metric to compare. In reality, the difference between a 120Hz and 240Hz TV may not be noticeable.
A TV with light-emitting diode technology is not necessarily a new type of television. It is still classified as a liquid-crystal display, or LCD. LED TVs simply use light-emitting diodes to create the back light for the display instead of cold cathode fluorescent lights like a traditional LCD screen. This in many cases does not make much of a difference in the quality of the picture, but it does allow television manufacturers to make thinner TVs that present a more streamlined appearance when mounted on a wall.
LED Refresh Rate
During the process of shopping for LED TVs, you will see a refresh rate advertised on each model. The refresh rate tells you how quickly the television refreshes the image on the screen as you watch video content. Flashing images on the screen very rapidly creates the illusion of movement on the TV. A faster refresh rate means the picture is flashing more rapidly, which reduces the chances of your seeing any motion blur on the screen, particularly when viewing fast action such as sports.
120Hz Vs. 240Hz
When it comes to refresh rates, the three primary categories are 60Hz, 120Hz and 240Hz. TVs with 120Hz or 240Hz rates are considered to be on the upper end of the scale. Most people cannot detect any motion blur when looking at a 60Hz TV. The likelihood of noticing any difference on a TV with a 120Hz or 240Hz refresh rate is small.
The primary reason that most people cannot tell the difference between the different refresh rates available on televisions is because of the video feed. Standard video has a 30 frames-per-second speed. The television then doubles that and flashes each frame on the TV twice to come up with a refresh rate of 60 per second. While 120Hz and 240Hz televisions display the images slightly differently, most viewers cannot discern a difference with the naked eye.