Going beyond the limit of an LCD's color gamut

Hai-Wei Chen; Rui-Dong Zhu; Juan He; Wei Duan; Wei Hu; Yan-Qing Lu; Ming-Chun Li; Seok-Lyul Lee; Ya-Jie Dong; Shin-Tson Wu

doi:10.1038/lsa.2017.43

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Going beyond the limit of an LCD's color gamut

Original Articles

- Going beyond the limit of an LCD's color gamut
- Light: Science & Applications Vol. 6, Issue 3, (2017)
- Affiliations：
  
  1.College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA
  2.National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
  3.AU Optronics Corp
  4.NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
- Author bio：
  
  ST Wu, Email: swu@creol.ucf.edu
- Funds：
- DOI：10.1038/lsa.2017.43
  CLC：
- Published：2017-09，
  
  Published Online：10 March 2017，
  
  Received：23 December 2016，
  
  Revised：08 March 2017，
  
  Accepted：08 March 2017
- Accepted：
Scan QR Code
Chen, H. W. et al. Going beyond the limit of an LCD's color gamut. Light: Science & Applications, 6, e17043 (2017).
DOI：

Chen, H. W. et al. Going beyond the limit of an LCD's color gamut. Light: Science & Applications, 6, e17043 (2017). DOI： 10.1038/lsa.2017.43.

摘要

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.

关键词

Keywords

color gamutliquid crystal displaysperovskitepolarizationquantum dot

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