Search Results - led

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Simultaneous High-resolution Electron and Laser Beam Irradiation for Luminescence Studies in a Scanning Electron
SUMMARY Many scientific studies utilize scanning electron microscopy (SEM), cathodoluminiescence (CL), photoluminescence (PL), and Raman Spectroscopy techniques to characterize newfound materials. This Lehigh University technology combines all of these techniques into one instrument by aligning an electron and laser beam within a high-resolution c...
Published: 11/6/2012   |   Inventor(s): Jonathan Poplawsky, Volkmar Dierolf
Keywords(s): Lasers, LED
Category(s): Electronics, Materials and Nanotechnology, Optical Networking and Sensors
Multi-Color Quantum Well based LEDs
SUMMARY Lehigh University has developed a new method to achieve high performance and high efficiency Group III-Nitride LEDs and lasers. High efficiency emitters in the blue, green and red regime are important for SSL and medical applications. LEDs and lasers based on conventional technology suffer from poor performances, with one of the limitation...
Published: 8/17/2012   |   Inventor(s): Nelson Tansu, Ronald Arif, Yik-Khoon Ee, Hongping Zhao
Keywords(s): Biomedical Applications, DVD lasers, LED, Light Emitting Diodes
Category(s): Electronics
Improved Light Extraction for Solid State Lighting
SUMMARY Lehigh University has developed a new, low-cost method to achieve enhanced light extraction efficiency for III-Nitride LEDs. Conventional LEDs with planar emission surface suffers from limited external quantum efficiency. The large refractive index difference in the semiconductor / air interface results in total internal reflection. This le...
Published: 6/10/2011   |   Inventor(s): Nelson Tansu, James Gilchrist, Yik-Khoon Ee, Pisist Kumnorkaew, Ronald Arif
Keywords(s): Diagnostic Devices/Treatments, LED, Light Emitting Diodes, Optoelectronic Emitters
Category(s): Electronics
Enhanced Light Emitting Diodes
SUMMARY InGaN based quantum wells (QWs) light-emitting diodes and laser diodes play an important role in solids sate lighting (SSL). As the InGaN QWs are coupled to surface plasmon (SP) mode of metallic film, the radiative recombincation rate can be enhanced due to the increased photon density of states near the SP frequency. Lehigh University h...
Published: 6/10/2011   |   Inventor(s): Nelson Tansu, Hongping Zhao, Guangyu Liu
Keywords(s): Efficiency Enhancement, LED, Light Emitting Diodes
Category(s): Electronics
Method for Growing Epitaxail III-Nitrate Semiconductor Compounds on Substrates
SUMMARY While LED lighting sources have huge advantages over conventional sources, high fabrication and limited brightness have limited adoption of solid state lighting outside certain niche applications such as traffic lights. Lehigh University has developed a new method to help overcome these issues. This technology is an abbreviated growth mode ...
Published: 5/17/2010   |   Inventor(s): Nelson Tansu, Helen Chan, Richard Vinci, Yik-Khoon Ee, Jeffrey Biser
Keywords(s): LED, Light Emitting Diodes, Solid State Lighting, UV laser
Category(s): Electronics
Data Driver for TFT Displays With Uniform Column Current Output
SUMMARY Advances in thin film transistor technology and improved performance of organic light emitting materials have catalyzed the development of display applications. However, variations in properties of the devices that from these panels yield noticeable display brightness non-uniformity due internal electronic circuits. Lehigh University has ...
Published: 3/25/2009   |   Inventor(s): Miltiadis Hatalis, Matias Troccoli
Keywords(s): Data Driver, High Quality Optics, LCD, LED
Category(s): Electronics