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Extracting concentrated guided light
Applied Optics, 1997The maximum concentration of radiation is proportional to the square of the refractive index of the medium in which it propagates. A medium with a high refractive index can also serve as a lightguide for concentrated radiation. However, if concentrated radiation is extracted from one medium, with a high refractive index, to another, whose index is ...
H, Ries, A, Segal, J, Karni
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Light extraction in tandem organic light emitting diodes
Applied Physics Letters, 2021Since the invention of organic light emitting diodes (OLEDs), great research efforts have been dedicated to improving their efficiency and lifetime. For high-brightness applications, tandem OLED structures have advantages because of the lower current densities required to achieve high brightness.
Xiangyu Fu +6 more
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Light Extraction with Dielectric Nanoantenna Arrays
ACS Nano, 2009SiO(2) and TiO(2) dielectric nanoparticles are arranged in linear arrays, supporting collective Bragg modes, and employed as dielectric nanoantennae. Electrodynamic calculations show that strong, tunable, and lossless light extraction is obtained in a wide spectral range, including UV, visible, and near-infrared regions, in opposition to poor ...
PELLEGRINI, GIOVANNI +2 more
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Light field extraction from a conventional camera
Signal Processing: Image Communication, 2022This paper presents a single-shot light field (LF) acquisition method using a conventional camera. The proposed method does not require any modification in the camera design and instead involves an offline calibration process. The calibration step involves the estimation of the point spread function (PSF) for different perspectives at all sampled ...
M. Zeshan Alam, Bahadir K. Gunturk
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Journal of the Society for Information Display, 2009
Abstract— A novel extractor's application to backlight‐unit (BLU) architectures of different size and application is presented. Critical material and design parameters are discussed. Seemingly trivial changes in design to accommodate different sizes and lighting geometries result in dramatic performance changes.
John C. Brewer, Ronald J. Sudol
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Abstract— A novel extractor's application to backlight‐unit (BLU) architectures of different size and application is presented. Critical material and design parameters are discussed. Seemingly trivial changes in design to accommodate different sizes and lighting geometries result in dramatic performance changes.
John C. Brewer, Ronald J. Sudol
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Light extraction from OLEDs for lighting applications through light scattering
Organic Electronics, 2007Abstract OLEDs are gaining increasing interest for lighting applications as large-area light sources. Their lifetime and overall efficiency can be increased by the optimization of light outcoupling. In this article, scattering films on the viewer’s side of the substrate to increase the outcoupling efficiency of OLEDs for lighting applications are ...
R. Bathelt +4 more
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Light Extraction Methods in Light-Emitting Diodes
CLEO:2011 - Laser Applications to Photonic Applications, 2011This paper describes the basics of light extraction in light-emitting diodes covering the ways light is trapped, is lost, and escapes. Additionally, methods to maximize light extraction in various UV-visible emitting semiconductors are shown.
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Light extraction from organic light emitting diode
SPIE Proceedings, 2007Organic light emitting diodes (OLEDs) have attracted much attention for several applications, such as light source and display. It is of both commercial and scientific interests to improve external quantum efficiency of such light emitters. The external quantum efficiency of OLED is determined by the combination of charge balance, singlet-triplet ratio
Wenbin Chen, Guang Li, Fei Wu
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Light Extraction Efficiency Part B. Light Extraction of High Efficient LEDs
2013This chapter deals with methods for fabricating high efficient light-emitting diodes (LEDs) with higher light extraction efficiency (LEE). Some LED prototypes are then reviewed to investigate how their performance was enhanced by utilizing a variety of chip processes.
Ja-Yeon Kim +6 more
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Corrugated Sapphire Substrates for Organic Light-Emitting Diode Light Extraction
ACS Applied Materials & Interfaces, 2015In an organic light-emitting diode (OLED), only about 20-30% of the generated light can be extracted because of the light lost to the thin film guided modes and surface plasmon. Using corrugated high-index-refractive substrates, the thin film guided modes can be effectively out-coupled from the device because of the high index substrate and the loss to
Wooram, Youn +4 more
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