Optical Modeling Analysis of Red, Green, and Yellow Phosphors with a Blue LED

Sun, Wen Shing; Tien, Chuen‐Lin

doi:10.1155/2018/5716259

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…Figure illustrates the bilayered device architecture combining a blue mini-LED backlight and a pixelated QDCCF. The mini-LED array provides the same central wavelength of 450 nm with Lambertian angular emission distribution . A thin diffuser plate was inserted between to homogenize the light from the mini-LED backlight.…”

Section: Resultsmentioning

confidence: 99%

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Asymmetric Quantum-Dot Pixelation for Color-Converted White Balance

et al. 2021

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Pixelated quantum-dot color conversion film (QDCCF) is attractive for next-generation, high-pixel-density, full-color displays. However, how to achieve white balance of these QD converted displays puts forward a new challenge, because the final light-emitting area is redefined by the apertures of the QD formed subpixels. Based on this, this paper presents an effective white-balance realization approach by precisely defining an asymmetric aperture ratio among three primary-color subpixels of the QDCCF. Based on the measured photoluminescence characteristic of quantum-dot photoresist (QDPR), the theoretical aperture ratio can be derived by the spectral radiation energy and external quantum efficiency (EQE) of QDCCFs for the target D65 white-balance state. A bilayered device architecture, combining a blue mini-LED backlight and a pixelated QDCCF, was simulated and experimentally assembled to verify the theoretical design. The simulated chromatic coordinates obtained from the QDCCF precisely agree with the target white-balance point. Experimental patterning and pixelation of the designed QDCCF were achieved by a precise photolithography process. Measured results show that a white-light output was achieved with the chromatic coordinates of (0.2822, 0.2951) and the color gamut of 115.09% NTSC (National Television System Committee) standard. The deviation of the experimental chromatic coordinates is within ±0.05 to the D65 standard light source. The proposed white-balance realization approach featured by the aperture adjustable subpixels of a chromatic QDCCF may open up a new route for color reproduction in emerging display technologies.

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Section: Resultsmentioning

confidence: 99%

“…The mini-LED array provides the same central wavelength of 450 nm with Lambertian angular emission distribution. 49 A thin diffuser plate was inserted between to homogenize the light from the mini-LED backlight. The patterned QDCCF is composed of a three-primary-color subpixel array surrounded by a black matrix layer.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Asymmetric Quantum-Dot Pixelation for Color-Converted White Balance

et al. 2021

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“…In another study, InGaN based blue LEDS are worked to enhance their efficiency in bottom tunnel junction [13]. The optical model of red, green and yellow phosphors with a Blue LED is constructed using the optical simulation sofware LightTools in [14].…”

Section: Introductionmentioning

confidence: 99%

Wavelength tune of InGaN based blue LEDs by changing indium percentage and operational voltage variables

GECER

Kıyak

2022

Balkan Journal of Electrical and Computer Engineering

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Abstract— blue light-emitting-diodes (LEDs) are special and different then the other LEDs due to their high-efficient lighting. They have large badgap energy. So gallium nitrides are mostly used during designing blue light. This application focus on the emission properties of a InGaN LED. The emission intensity, energy diagram, spectrum, and efficiency are calculated for an applied voltage. The indium and GaN composition in the blue LED can be varied to control the emission wavelength. In here, composition of InGaN and operational voltage values were varied to control wavelength. Effects of the different InGaN composition and different voltage values were given in results as comperehansively for 5 different simulations. This study is dissimalar than other wevelength studies due to used original parameter values and wavelength compared methods for many situations about InGaN percentage and volatage values. As a result of simulations, we can infer that the high In_x percentage in composition and high voltage makes wavelength gap of an blue LED larger.

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Dopant and excitation wavelength dependent color tunability in Dy3+ and Eu3+ doped CaBi2B2O7 phosphors for NUV warm white LEDs

Gao

Sun

et al. 2020

Materials Research Bulletin

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Optical Modeling Analysis of Red, Green, and Yellow Phosphors with a Blue LED

Cited by 4 publications

References 10 publications

Asymmetric Quantum-Dot Pixelation for Color-Converted White Balance

Asymmetric Quantum-Dot Pixelation for Color-Converted White Balance

Wavelength tune of InGaN based blue LEDs by changing indium percentage and operational voltage variables

Dopant and excitation wavelength dependent color tunability in Dy3+ and Eu3+ doped CaBi2B2O7 phosphors for NUV warm white LEDs

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