savvytechno

"The refresh rate (or ""vertical refresh rate"", ""vertical scan rate"" for CRTs) is the number of times in a second that a display is illuminated. This is distinct from the measure of frame rate in that the refresh rate includes the repeated illumination of identical frames, while frame rate measures how often a display can change from one image to another. For example, a movie projector advances from one frame to the next 24 times each second. But each frame is illuminated twice before the next frame is projected. The result, the movie projector runs at 24 frames per second, but has a 48 hz refresh rate.

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