Recent Advances on Quantum-Dot-Enhanced Liquid-Crystal Displays

Chen, Haiwei; He, Jinwei; Wu, Shin‐Tson

doi:10.1109/jstqe.2017.2649466

Cited by 156 publications

(152 citation statements)

References 107 publications

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“…Vivid color is a key metric for display devices, as it enables a more realistic viewing experience. Generally, light sources with a narrower full width at half maximum (FWHM) would lead to a wider color gamut . In our modeling, we use a combination of green phosphor (β‐sialon: Eu2+, FWHM ~50 nm) and red phosphor (CaAlSiN 3 :Eu 2+ ) to improve the color performance.…”

Section: Simulated Results and Discussionmentioning

confidence: 99%

“…Generally, light sources with a narrower full width at half maximum (FWHM) would lead to a wider color gamut. 16 In our modeling, we use a combination of green phosphor (β-sialon: Eu2+, FWHM~50 nm) and red phosphor (CaAlSiN 3 :Eu 2+ ) 17 to improve the color performance. Figure 5 depicts the spectrum of blue micro-LED pumped the two-color phosphors and the simulated color gamut in CIE 1931 color space is shown in Figure 6.…”

Section: Color Gamutmentioning

confidence: 99%

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High performance color‐converted micro‐LED displays

et al. 2019

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A full‐color micro‐LED display can be achieved by red, green, and blue (RGB) chips or by a blue/ultraviolet (UV) micro‐LED array to pump downconverters. The latter helps relieve the burden of epitaxial growth of tri‐color micro‐LED chips. However, such a color‐converted micro‐LED system usually suffers from color crosstalk and low efficiency due to limited optical density of color converters. With funnel‐tube array and reflective coating on its inner surface, the crosstalk is eliminated, and the optical efficiency can be improved by more than two times. In addition, the ambient contrast ratio is also improved because of higher light intensity. The color gamut of this device is approximately 92% of DCI‐P3 standard.

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Section: Simulated Results and Discussionmentioning

confidence: 99%

Section: Color Gamutmentioning

confidence: 99%

High performance color‐converted micro‐LED displays

et al. 2019

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“…Backlight on an LCD display constrains vivid colors from being reproduced. However, the use of discrete RGB LEDs extends the color gamut, but the display remains weak when reproducing pure primaries . Hence enhanced color gamuts are required to overcome barriers and to match the requirements of advanced digital reproduction domains.…”

Section: Introductionmentioning

confidence: 99%

“…However, the use of discrete RGB LEDs extends the color gamut, but the display remains weak when reproducing pure primaries. [2][3][4][5] Hence enhanced color gamuts are required to overcome barriers and to match the requirements of advanced digital reproduction domains. Different ways have been used to extend the display color gamut; for example, narrow bandwidth primaries, gamut mapping algorithms, new extended RGB color spaces, and/or multi-primaries displays.…”

Section: Introductionmentioning

confidence: 99%

A multi‐primary empirical model based on a quantum dots display technology

Huraibat

Perales

Viqueira

et al. 2020

Color Research & Application

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In this work, we built a multi‐primary display model based on the new quantum dots (QD) technology to enlarge the display color gamut. In this way, first the emission spectral radiance curves of the three RGB channels of a commercial QD display were fitted to a four‐parameter function. From this modeling, it is possible to gain new theoretical color primaries by selecting new spectral peaks (cyan, yellow, magenta, and/or additional RGB primaries) and imposing some colorimetric conditions for the resulting white of this proposed theoretical multi‐primary display. Proper characterization to assess the performance of the display was conducted to know if the basic “gain‐offset‐gamma” (GOG) model can be used for direct and inverse color reproduction (from RGB to CIE‐XYZ, and vice versa). The GOG model was found to well characterize this display. The spatial uniformity of the display was also evaluated in luminance and color chromaticity terms. Finally, with the primaries modeling and color characterization based on the GOG model, a 5‐primary model (RGBYC) was tested. The evaluation of this theoretical RGBYC display model confirms the gamut enlargement, which can also improve goniochromatic color reproduction.

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“…Quantum dot (QD) nanocrystals are used in various optoelectronics devices since the emission spectrum can be controlled easily by varying the size of quantum dots due to a remarkable quantum confinement effect [1][2][3]. Especially, the optically induced emission (photoluminescence, PL) of QDs has been used as wavelength-downconverter in white light-emitting diodes (LEDs) [4,5] and liquid-crystal displays (LCDs) [6][7][8]. In these applications, both optical efficiency and color gamut were enhanced compared with conventional luminescent materials owing to their advantages such as high fluorescence quantum yield up to 98% in Cd based QD, broad absorption spectrum, and symmetric emission spectrum with narrow full width at half maximum (FWHM) around from 20 to 30 nm [9,10].…”

Section: Introductionmentioning

confidence: 99%

16.1: Invited Paper: Enhancement of optical efficiency in white OLED using a patterned quantum dot film with light recycling components

Kim

2018

Symp Digest of Tech Papers

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We applied the patterned QD film to white OLED displays to increase the optical efficiency by converting the unnecessary light from white OLED before being cut by color filter. The red and green patterned quantum dot (QD) film has been developed using general photolithography process. In addition, we have studied on further enhancement of optical efficiency by applying various light recycling components, such as long‐pass filter (LPF), air‐gapped bridges, and TiO2 nanoparticles. Compared with a white OLED display with only color filters (CFs), it was confirmed experimentally that the optical efficiencies of red and green light were increased up to 158% and 117% in our proposed white OLED display after applying patterned QD film with light recycling components which are based on the mechanism of total internal reflection (TIR) and scattering characteristics.

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Recent Advances on Quantum-Dot-Enhanced Liquid-Crystal Displays

Cited by 156 publications

References 107 publications

High performance color‐converted micro‐LED displays

High performance color‐converted micro‐LED displays

A multi‐primary empirical model based on a quantum dots display technology

16.1: Invited Paper: Enhancement of optical efficiency in white OLED using a patterned quantum dot film with light recycling components

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