Minimization of halo mura in homogenous alignment liquid crystal displays via a dichroic light absorber [Invited]
OPTICAL MATERIALS EXPRESS(2023)
摘要
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.& COPY; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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关键词
liquid crystal displays,dichroic light absorber,halo mura
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