Open AccessHalo effect in high-dynamic-range mini-LED backlit LCDs
Author(s) -
EnLin Hsiang,
Qian Yang,
Ziqian He,
Junyu Zou,
ShinTson Wu
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.413133
Subject(s) - backlight , illuminance , liquid crystal display , halo , optics , glare , computer science , high dynamic range , contrast (vision) , metric (unit) , image quality , night vision , artificial intelligence , computer vision , physics , dynamic range , materials science , engineering , image (mathematics) , operations management , layer (electronics) , quantum mechanics , galaxy , composite material
We develop an optical model including the glare effect in the human vision system to analyze the halo effect of high-dynamic-range (HDR) mini-LED backlit liquid crystal displays (LCDs). In our model, an objective function is first introduced to evaluate the severity of the halo effect with different image contents. This function is further combined with PSNR to establish a new evaluation metric to analyze the image quality affected by the halo effect. A subjective visual experiment is also conducted to verify the above-mentioned evaluation metrics. In addition, we analyze the influence of ambient environment (viewing angle and ambient light illuminance) on the halo effect. After considering the requirements on local dimming zones, dynamic contrast ratio, gamma shift, and color shift for practical applications, we find that fringe-field-switching mode is a strong contender for the mini-LED backlit LCD system.