A method of increasing efficiency of video display includes receiving a first frame signal, where the first frame signal includes a first blank signal and a first image data, where the first blank signal includes a first sync signal, a first front-porch signal and a first back-porch signal. The method also includes separating the first blank signal and the first image data, performing image processing for the first image data for generating a second image data, and adding a second blank signal to the second image data for generating a second frame signal, where the second blank signal includes a second sync signal, a second front-porch signal and a second back-porch signal.