Volumetric light-shaping polymer-dispersed liquid crystal films for mini-LED backlights

被引：26

作者：

He, Ziqian ^{[1
]}

Yin, Kun ^{[1
]}

Hsiang, En-Lin ^{[1
]}

Wu, Shin-Tson ^{[1
]}

机构：

[1] Univ Cent Florida, Coll Opt & Photon, Orlando, FL 32816 USA

来源：

LIQUID CRYSTALS | 2020年 / 47卷 / 10期

关键词：

Polymer-dispersed liquid crystals; volumetric diffusers; angle-dependent scattering; mini-LED backlights; SCATTERING; BALLS;

D O I：

10.1080/02678292.2020.1735546

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Volumetric light-shaping polymer-dispersed liquid crystal (PDLC) films for mini-LED backlit liquid crystal displays (LCDs) are proposed and experimentally demonstrated. With proper material engineering and good vertical alignment of liquid crystals, passive PDLC films with angle-selective scattering properties can be achieved. Such films only respond to angles rather than spatial locations. By directly adhering the PDLC films onto a LED, angular intensity distribution of light can be tailored from Lambertian-like to batwing-like. Further simulation shows that by engineering the angular distribution, a fewer number of LEDs or equivalently a shorter light-spreading distance should be required to maintain good uniformity. Such a PDLC film would find widespread applications in emerging mini-LED backlit LCDs and shed light on designing other light-shaping films in the future.

引用

页码：1458 / 1463

页数：6

共 19 条

[1]

Binyi Zheng, 2019, SID Symposium Digest of Technical Papers, V50, P566, DOI 10.1002/sdtp.12983

[2] Liquid crystal display and organic light-emitting diode display: present status and future perspectives [J].

Chen, Hai-Wei ;

Lee, Jiun-Haw ;

Lin, Bo-Yen ;

Chen, Stanley ;

Wu, Shin-Tson .

LIGHT-SCIENCE & APPLICATIONS, 2018, 7 :17168-17168

[3] POLYMER DISPERSED LIQUID-CRYSTALS FOR DISPLAY APPLICATION [J].

DOANE, JW ;

GOLEMME, A ;

WEST, JL ;

WHITEHEAD, JB ;

WU, BG .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1988, 165 :511-532

[4] FIELD CONTROLLED LIGHT-SCATTERING FROM NEMATIC MICRODROPLETS [J].

DOANE, JW ;

VAZ, NA ;

WU, BG ;

ZUMER, S .

APPLIED PHYSICS LETTERS, 1986, 48 (04) :269-271

[5] Ultra-High Light Extraction Efficiency and Ultra-Thin Mini-LED Solution by Freeform Surface Chip Scale Package Array [J].

Huang, Che-Hsuan ;

Kang, Chieh-Yu ;

Chang, Shu-Hsiu ;

Lin, Chih-Hao ;

Lin, Chun-Yu ;

Wu, Tingzhu ;

Sher, Chin-Wei ;

Lin, Chien-Chung ;

Lee, Po-Tsung ;

Kuo, Hao-Chung .

CRYSTALS, 2019, 9 (04)

[6] Prospects and challenges of mini-LED and micro-LED displays [J].

Huang, Yuge ;

Tan, Guanjun ;

Gou, Fangwang ;

Li, Ming-Chun ;

Lee, Seok-Lyul ;

Wu, Shin-Tson .

JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY, 2019, 27 (07) :387-401

[7] Selective scattering polymer dispersed liquid crystal film for light enhancement of organic light emitting diode [J].

Jiang, Jinghua ;

McGraw, Greg ;

Ma, Ruiqing ;

Brown, Julie ;

Yang, Deng-Ke .

OPTICS EXPRESS, 2017, 25 (04) :3327-3335

[8] Eliminating hotspots in a multi-chip LED array direct backlight system with optimal patterned reflectors for uniform illuminance and minimal system thickness [J].

Kim, Byungwook ;

Kim, Joongeok ;

Ohm, Won-Suk ;

Kang, Shinill .

OPTICS EXPRESS, 2010, 18 (08) :8595-8604

[9] Pinning effect on the phase separation dynamics of thin polymer-dispersed liquid crystals [J].

Lin, YH ;

Ren, HW ;

Wu, YH ;

Liang, X ;

Wu, ST .

OPTICS EXPRESS, 2005, 13 (02) :468-474

[10] High contrast polymer-dispersed liquid crystal in a 90° twisted cell [J].

Lin, YH ;

Ren, H ;

Wu, ST .

APPLIED PHYSICS LETTERS, 2004, 84 (20) :4083-4085

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