Going Beyond The Limit Of An Lcd'S Color Gamut

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.

Publication Date

9-8-2017

Publication Title

Light: Science and Applications

Volume

6

Issue

9

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1038/lsa.2017.43

Socpus ID

85029142309 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85029142309

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