Results 21 to 30 of about 281,686 (341)

A Review of Solid State White Light Emitting Diode and Its Potentials for Replacing Conventional Lighting Technologies in Developing Countries [PDF]

open access: yes, 2014
Lighting is an indispensable energy end use of man. A significant number people in developing countries live without electric lighting and depend on oil-based lamps. Globally, lighting consumes substantial amount of energy and is a major contributor to
Ahemen, I, Amah, A. N, De, Dilip Kumar
core   +1 more source

Prediction of Lumen Depreciation and Color Shift for Phosphor-Converted White Light-Emitting Diodes Based on A Spectral Power Distribution Analysis Method

open access: yesIEEE Access, 2017
The spectral power distribution (SPD) is considered as the figureprint of a light emitting diode (LED). Based on the analysis on its SPD, a method to predict both lumen depreciation and color shift for the phosphor converted white LEDs (pc-LEDs) is ...
Cheng Qian   +3 more
doaj   +1 more source

An overview on the principle of inkjet printing technique and its application in micro-display for augmented/virtual realities

open access: yesOpto-Electronic Advances, 2022
Augmented reality (AR) and virtual reality (VR) are two novel display technologies that are under updates. The essential feature of AR/VR is the full-color display that requires high pixel densities.
Xiao Yang   +6 more
doaj   +1 more source

Nanospherical-lens lithographical Ag nanodisk arrays embedded in p-GaN for localized surface plasmon-enhanced blue light emitting diodes

open access: yesAIP Advances, 2014
Large-scale Ag nanodisks (NDs) arrays fabricated using nanospherical-lens lithography (NLL) are embedded in p-GaN layer of an InGaN/GaN light-emitting diode (LED) for generating localized surface plasmon (LSP) coupling with the radiating dipoles in the ...
Tongbo Wei   +10 more
doaj   +1 more source

Optimization Studies of Two-Phosphor-Coated White Light-Emitting Diodes

open access: yesIEEE Photonics Journal, 2013
Three-hump InGaN-based white light-emitting diodes (LEDs) precoated with traditional yellow/green phosphors and red-emitting quantum dots (QDs), have been numerically investigated.
Ziquan Guo   +8 more
doaj   +1 more source

Investigation on Circadian Action and Color Quality in Laser-Based Illuminant for General Lighting and Display

open access: yesIEEE Photonics Journal, 2020
In this work, the genetic algorithm is employed to optimize both circadian action factor (CAF) and color quality of laser-based illuminants (LBIs) with three, four, and five spectral bands to disclose its possible use in two common white lighting ...
Shuo-Di Lei   +13 more
doaj   +1 more source

Laser Diode Induced Lighting Modules [PDF]

open access: yes, 2016
Laser diodes have the potential of becoming the light engines of future lighting technology since they have negligible efficiency droop factor, unlike light emitting diodes.
Fern, G.R.   +7 more
core   +2 more sources

Solid State Lighting [PDF]

open access: yesOptical Engineering, 2005
This PDF file contains the editorial “Editorial: Solid State Lighting” for OE Vol.
openaire   +2 more sources

Bilayer–metal assisted chemical etching of silicon microwire arrays for photovoltaic applications

open access: yesAIP Advances, 2016
Silicon microwires with lateral dimension from 5 μm to 20 μm and depth as long as 20 μm are prepared by bilayer metal assisted chemical etching (MaCE).
R. W. Wu   +7 more
doaj   +1 more source

Spectral Optimization of Three-Primary LEDs by Considering the Circadian Action Factor

open access: yesIEEE Photonics Journal, 2016
For humans, nonvisual biological effects, which can be parameterized by the circadian action factor (CAF), are important for their health and work performance.
Li-Li Zheng   +7 more
doaj   +1 more source

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