Luminance Uniformity Evaluation for LED Display Panel Based on HVS

Aiming at the characteristics of the full-color LED display panel,a new LED display panel luminance uniformity assessment method based on Human Visual System(HVS) is proposed,which is validated by the experiment.The method uses CCD image sensor to get LED images.The image is divided into equal regions and each region's luminance characteristic factor,texture detail characteristic factor,and spatial location characteristic factor are calculated.Afterwards,three characteristic factors are integrated to be used as each region's luminance uniformity evaluation parameter,the dispersion of full screen regions can serve as the assessment criteria of the luminance uniformity and the assessment result is given objectively and accurately.Experiments show that this method is basically in accord with the subjective evaluation results.In addition,the method improves the consistency between objective evaluation and subjective evaluation about the luminance uniformity.