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Zero-Optical-Distance Mini-LED Backlight with Cone-Shaped Light Coupling Microstructures

Authors :
Zibin Lin
Haonan Jiang
Daochun Ye
Wenyan Zhang
Enguo Chen
Yun Ye
Sheng Xu
Qun Yan
Tailiang Guo
Source :
Crystals, Volume 13, Issue 2, Pages: 241
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

This paper presents a zero-optical-distance mini-LED backlight with cone-shaped light coupling microstructures to achieve an ultra-thin backlight architecture (~0.1 mm thickness) by combining the characteristics of direct-lit and edge-lit backlights. There is no gap between the light guide plate (LGP) and the reflector, as well as between the LGP and the mini-LED embedded in the reflector. The illuminance uniformity and light extraction efficiency (LEE) of the whole structure reach 91.47% and 77.09%, respectively. Nine sub-modules are spliced together to realize 2D local dimming with 0.29% crosstalk. The structure shows high optical performance while reducing the thickness of the backlight module, which is of great significance for the development of mini-LED backlights.

Details

ISSN :
20734352
Volume :
13
Database :
OpenAIRE
Journal :
Crystals
Accession number :
edsair.doi.dedup.....3adb5c50cf62fafc095fb749451465ca
Full Text :
https://doi.org/10.3390/cryst13020241