Going beyond the limit of an LCD's color gamut

Light, Science & Applications
Haiwei ChenShin-Tson Wu

Abstract

In this study, we analyze how a backlight's peak wavelength, full-width at half-maximum (FWHM), and color filters affect the color gamut of a liquid crystal display (LCD) device and establish a theoretical limit, even if the FWHM approaches 1 nm. To overcome this limit, we propose a new backlight system incorporating a functional reflective polarizer and a patterned half-wave plate to decouple the polarization states of the blue light and the green/red lights. As a result, the crosstalk between three primary colors is greatly suppressed, and the color gamut is significantly widened. In the experiment, we prepare a white-light source using a blue light-emitting diode (LED) to pump green perovskite polymer film and red quantum dots and demonstrate an exceedingly large color gamut (95.8% Rec. 2020 in Commission internationale de l'éclairage (CIE) 1931 color space and 97.3% Rec. 2020 in CIE 1976 color space) with commercial high-efficiency color filters. These results are beyond the color gamut limit achievable by a conventional LCD. Our design works equally well for other light sources, such as a 2-phosphor-converted white LED.

References

Jun 3, 2010·Advanced Materials·Eunjoo JangYounghwan Kim
Nov 13, 2013·Optics Express·Zhenyue LuoShin-Tson Wu
Apr 4, 2015·Optics Express·Kenichiro Masaoka, Yukihiro Nishida
Sep 15, 2015·Optics Express·Ruidong ZhuShin-Tson Wu

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Citations

Jan 24, 2019·Advanced Materials·Yun-Fei LiQibing Pei
Jan 24, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Quan DongShaohua Yang
Apr 10, 2020·Chemical Communications : Chem Comm·Qiang ZhangYuhua Wang
Oct 23, 2019·Nature Communications·June Sang LeeJerome K Hyun
Jun 25, 2020·Light, Science & Applications·Yuge HuangShin-Tson Wu
Jan 16, 2019·Applied Optics·Hongyu YangJiayu Zhang
Dec 11, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Xuejiao WangPanlai Li
May 18, 2021·Journal of Materials Chemistry. C, Materials for Optical and Electronic Devices·Simon F SolariChih-Jen Shih
Jun 19, 2021·Light, Science & Applications·Yuge HuangShin-Tson Wu
Apr 14, 2018·ACS Applied Materials & Interfaces·Zunxian YangSheng Xu
Oct 11, 2019·ACS Applied Materials & Interfaces·Zibo LiYumeng Shi
Jun 29, 2018·The Journal of Physical Chemistry Letters·Gabriel Lozano
Jan 4, 2020·ACS Applied Materials & Interfaces·Kyungnae BaekJerome K Hyun
Oct 2, 2021·Advanced Materials·Qin ChenLong Wen

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Methods Mentioned

BETA
liquid crystal display

Software Mentioned

Adobe RGB

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