Abstract:

The luminance uniformity is an important indicator in the LED unit board image quality evaluation.The existing evaluation methods have the disadvantages of complicated operation and low accuracy.In this article,the uniformity of the LED unit board evaluation method is improved by using the Fourier transform to make a more reasonable evaluation of the uniformity of the light board.This method considers not only the difference in brightness of the lights point,but also the location of the point of the lights,thus a more realistic evaluation.

Key words: LED unit board;uniform;variance;fourier transform