Abstract
Local dimming technology enables high dynamic range liquid crystal displays (LCDs). However, when displaying a bright image in a dark background, so-called halo mura (halation caused by local light leakage in oblique viewing directions) appears and degrades image quality owing to reduction in contrast ratio (CR). Here light-absorbing vertically aligned dichroic dye film cells are demonstrated to enhance the CR in a homogenously aligned LC mode. The light leakage in normal and oblique viewing directions is reduced greatly in both simulated and experimental results. Positioning such a functional film above the conventional polarizer can greatly improve the CR of all LCDs while reducing surface reflection.
Funder
LG Display
Ministry of Science and ICT, South Korea
Ministry of Education
Subject
Electronic, Optical and Magnetic Materials
Cited by
2 articles.
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