SONG Xin-li;ZHENG Xi-feng;LING Li-qing;HAO Ya-ru;. Luminance Uniformity Evaluation for LED Display Panel Based on Gray Histogram[J]. 液晶与显示, 2009,24(1): 140-144
SONG Xin-li;ZHENG Xi-feng;LING Li-qing;HAO Ya-ru;. Luminance Uniformity Evaluation for LED Display Panel Based on Gray Histogram[J]. 液晶与显示, 2009,24(1): 140-144DOI:
the luminance uniformity of LED display screen is an important factor for display quality. In order to guide the R&D and production of LED display panel
an object and exact evaluation for LED luminance uniformity is necessary. In this paper
on the basis of the exiting methods
an evaluation method based on gray histogram has been raised. In this method
the luminance information of LED display penal is obtained by CCD image sensor
with digital image processing technology and statistical knowledge
the histogram is fitted by normal distribution curve. The luminance uniformity is evaluated by standard deviation
and it is proved to be fitted with subjective method.