Results 41 to 50 of about 315,425 (275)

Effect of selected luminescent layers on CCT, CRI, and response times [PDF]

open access: yes, 2019
Phosphors have been used as wavelength converters in illumination for many years. When it is excited with blue light, the frequently used yttrium aluminium garnet doped with cerium (YAG:Ce) phosphor converts a part of blue light to a wideband yellow ...
Jargus, Jan   +4 more
core   +1 more source

AlGaInN laser diode technology for GHz high-speed visible light communication through plastic optical fiber and water [PDF]

open access: yes, 2016
AlGaInN ridge waveguide laser diodes are fabricated to achieve single-mode operation with optical powers up to 100 mW at ∼420  nm∼420  nm for visible free-space, underwater, and plastic optical fiber communication.
Czernecki, Robert   +12 more
core   +1 more source

Investigations on the high performance of InGaN red micro-LEDs with single quantum well for visible light communication applications

open access: yesDiscover Nano, 2023
In this study, we have demonstrated the potential of InGaN-based red micro-LEDs with single quantum well (SQW) structure for visible light communication applications.
Fu-He Hsiao   +14 more
doaj   +1 more source

Gb/s visible light communications with colloidal quantum dot color converters [PDF]

open access: yes, 2017
This paper reports the utilization of colloidal semiconductor quantum dots as color converters for Gb/s visible light communications. We briefly review the design and properties of colloidal quantum dots and discuss them in the context of fast color ...
Dawson, Martin D.   +8 more
core   +1 more source

Strain-Reduced Micro-LEDs Grown Directly Using Partitioned Growth [PDF]

open access: yesFrontiers in Chemistry, 2021
Strain-reduced micro-LEDs in 50 μm × 50 μm, 100 μm × 100 μm, 200 μm × 200 μm, 500 μm × 500 μm, and 1,000 μm × 1,000 μm sizes were grown on a patterned c-plane sapphire substrate using partitioned growth with the metal-organic chemical-vapor deposition (MOCVD) technique.
Shunpeng Lu   +10 more
openaire   +6 more sources

Color Quality Improvement of Micro LED Display Image by TMP LED Design

open access: yesIEEE Access, 2018
In recent years, Micro LED technology has been popularly developed. How to improve the issue of color stability in Micro LED technology is an important and also a difficult research topic.
Hsiao-Wen Lee   +2 more
doaj   +1 more source

Recent developments of quantum dot based micro-LED based on non-radiative energy transfer mechanism

open access: yesOpto-Electronic Advances, 2021
With regard to micro-light-emitting diodes (micro-LEDs), their excellent brightness, low energy consumption, and ultra-high resolution are significant advantages.
Xiaotong Fan   +5 more
doaj   +1 more source

Experimental Demonstration of Staggered CAP Modulation for Low Bandwidth Red-Emitting Polymer-LED based Visible Light Communications [PDF]

open access: yes, 2019
In this paper we experimentally demonstrate, for the first time, staggered carrier-less amplitude and phase (sCAP) modulation for visible light communication systems based on polymer light-emitting diodes emitting at ~639 nm. The key advantage offered by
Andersson, Mats R.   +10 more
core   +3 more sources

GaN micro-light-emitting diode arrays with monolithically integrated sapphire microlenses [PDF]

open access: yes, 2004
A microdisk light emitting diode (micro-LED) with a monolithically integrated microlens array was demonstrated. The capability of the lenses in concentrating light emitted from microdisk LEDs was also demonstrated.
Choi, HW   +6 more
core   +1 more source

Automated alignment in mask‐free photolithography enabled by micro‐LED arrays

open access: yesElectronics Letters, 2021
We present an automated control system for micro scale positioning, based on single pixel imaging and fluorescence. By projecting a chequerboard array of CMOS controllable μ‐LEDs at a suitable wavelength, we are able to spatially locate, track and ...
M. Stonehouse   +7 more
doaj   +1 more source

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