It may be the halfback seems to leave a feathering trail on your LCD TV as he runs toward the goal during Monday Night Football. Or perhaps the fast-paced chase scene in Casino Royale is a bit blurred. In a quest for the perfect moving picture, TV manufacturers have found that altering the refresh rate of flat panel TVs can solve many ills that cause action to blur. No longer strapped by scanning technology of CRT and the NTSC broadcasts, they are free to change how often the screen refreshes. To sell this benefit, you will want to be able to explain refresh rates and give your customer tips on how to set up their TV.
Refresh rate, described in hertz (Hz) is how many times per second the display is refreshed to show the next frame. In the U.S., TVs typically run at a 60Hz refresh rate. We know that video runs at 60 fields or frames per second, and you can see how that matches a screen refreshing 60 times per second. Be careful not to confuse refresh rates with frame rates. Frame rate refers to the actual number of the original program’s different pictures or fields appearing within a second.
Manufacturers can now speed up the refresh rate to 72 Hz, or double it to 120 Hz. The idea is that faster refresh rates smooth jagged edges, feathering, and motion artifacts, and blurring of boxes following a moving object.