Inverse of mapping function (IMF) method for image quality enhancement of high dynamic range LCD TVs

Abstract

A high dynamic range liquid crystal display (HDR-LCD) can much enhance the contrast ratio of the image on a locally controlled dynamic backlight. A novel method, inverse of mapping Junction (IMF), was demonstrated to further improve the HDR image quality from the information of each frame. By using the IMF method, the image contrast ratio in a 37 '' HDR-LCD TV was successfully improved to similar to 20,000:1 while maintaining high brightness and clear image details. Besides, for mass production purpose, the backlight of a 37 '' HDR-LCD TV was divide into 8x8 zones to reduce hardware computation complexity.