Open AccessRealization of 95% of the Rec 2020 color gamut in a highly efficient LCD using a patterned quantum dot film
Author(s) -
Hyo Jun Kim,
Min Ho Shin,
Jae Yong Lee,
Ji Hoon Kim,
Young Joo Kim
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.010724
Subject(s) - gamut , backlight , liquid crystal display , color gel , materials science , color filter array , optics , quantum dot , transmittance , optoelectronics , physics , thin film transistor , nanotechnology , layer (electronics)
An optically efficient liquid-crystal display (LCD) structure using a patterned quantum dot (QD) film and a short-pass filter (SPF) was proposed and fabricated. The patterned QD film contributed to the generation of 95% in the area ratio (or 90% in the coverage ratio) of the Rec. 2020 color gamut. This was achieved by avoiding the problem of interaction between white backlight and broad transmittance spectra of color filters (CFs) as seen in a conventional LCD with a mixed QD film as a reference. The patterned QD film can maintain the narrow bandwidth of the green and the red QD colors before passing through the CFs. Additionally, the optical intensities of the red, green, and blue spectra were enhanced to 1.63, 1.72, and 2.16 times the reference LCD values, respectively. This was a result of separated emission of the red and green patterned QD film and reflection of the red and green light to the forward direction by the SPF.