Abstract

A new light guide plate (LGP) with highly directional emission properties based on V-groove cells has been investigated. To achieve high uniformity at normal luminance distributions for LCD backlight units (BLUs), we present a cell composed of multiple V-groove microstructures, and demonstrate its performance in a 10.1-inch BLU. We have found the density of the V-grooves to affect luminance distribution, and the directionality of emissions increases with number of V-groove microstructures in a cell. A cell composed of five V-groove microstructures delivered a 1.9-fold increase in optical efficiency when compared with a conventional BLU: the central luminance was 2.3 times greater, the main viewing angle was at $-{{1}}^{\circ}$ , and distribution of viewing luminance was almost symmetrical. In conclusion, our V-groove cell LGP for BLUs is thin and simple, providing high efficiency and high uniformity at normal luminance distributions.

© 2014 IEEE

Edge/direct-lit hybrid mini-LED backlight with U-grooved light guiding plates for local dimming

Enguo Chen, Ju Guo, Zongzhao Jiang, Qiongxin Shen, Yun Ye, Sheng Xu, Jie Sun, Qun Yan, and Tailiang Guo
Opt. Express 29(8) 12179-12194 (2021)

Edge-lit LCD backlight unit for 2D local dimming

Gun-Wook Yoon, Seok-Won Bae, Yong-Bok Lee, and Jun-Bo Yoon
Opt. Express 26(16) 20802-20812 (2018)

High-efficiency backlight module with two guiding modes

Chang-Yi Li and Jui-Wen Pan
Appl. Opt. 53(8) 1503-1511 (2014)

Integrated backlight module to provide a collimated and uniform planar light source

Bing-Le Huang and Tai-Liang Guo
Appl. Opt. 55(26) 7307-7313 (2016)

Simple liquid crystal display backlight unit comprising only a single-sheet micropatterned polydimethylsiloxane (PDMS) light-guide plate

Joo-Hyung Lee, Hong-Seok Lee, Byung-Kee Lee, Won-Seok Choi, Hwan-Young Choi, and Jun-Bo Yoon
Opt. Lett. 32(18) 2665-2667 (2007)