Lighting

Self-Activating and Doped Tantalate Phosphors

LED Display Engineering

The primary objective of this project was to develop and implement a method that compensates for the inefficiency of the green light-emitting diode (LED). The proposed engineering solution was to use RGBW combination in...

Self-Activating and Doped Tantalate Phosphors

Phosphors are useful in numerous applications including imaging, detection, and lighting. They come in forms of thin films, monoliths, or powders for miscellaneous devices, or dispersible nano...

GaN-Ready Aluminum Nitride Substrates

Crystal IS, Inc., Green Island, NY The objective of this project was to develop and then demonstrate the efficacy of a cost-effective approach for a low-defect-density substrate on which aluminum indium...

Photoluminescent Nanofibers for High-Efficiency Solid-State Lighting

Polymer nanofibers are nanoscale materials whose properties can be adjusted to provide desirable light management performance for high efficiency solid-state lighting...

Photoluminescent Nanofibers for High-Efficiency Solid-State Lighting

Polymer nanofibers are nanoscale materials whose properties can be adjusted to provide desirable light management performance for high-efficiency solid-state lighting (SSL)...

White Scattered Photon Extraction LEDs with Multi-Phosphor Layers

Early phosphor-converted white light-emitting diodes (LEDs) produced light with poor color characteristics in terms of color rendering index (CRI) and correlated color...

Nanoengineering for Solid-State Lighting

This report summarizes results from a three-year Laboratory Directed Research and Development (LDRD) project. The collaborative effort of researchers from Sandia National Laboratories and Rensselaer...

Nanoengineering for Solid-State Lighting

Sandia National Laboratories, Albuquerque, NM Rensselaer Polytechnic Institute, Troy, NY This report summarizes results from a three-year Laboratory Directed Research and Development (LDRD) project. The...

LED Lighting for Maintenance and Construction Vehicles

Strobe or rotating beacon-type emergency lighting is a requirement on all Minnesota Department of Transportation (Mn/DOT) maintenance and construction vehicles. There is an effort to...

LED Lighting for Maintenance and Construction Vehicles

Strobe or rotating beacon-type emergency lighting is a requirement on all Minnesota Department of Transportation (Mn/DOT) maintenance and construction vehicles. There is an effort to...

Demonstration Assessment of LED Freezer Case Lighting

This report describes the process and results of a demonstration of solid-state lighting (SSL) technology combined with occupancy sensors in a set of upright grocery store freezer cases. The...

Diffuse-Illumination Systems for Growing Plants

A proposed plant-growth system takes advantage of the highly diffuse reflective surfaces on the interior of a sphere, hemisphere, or other nearly enclosed structure that is coated with highly...

Development of Advanced LED Phosphors by Spray-based Processes for Solid-State Lighting

Luminescent materials were developed using aerosol processes, for making improved LED devices for solid-state lighting. In essence this means improving...

Sliding Mode Pulsed Current Averaging IC Drivers for High-Brightness Light Emitting Diodes

Light Emitting Diode (LED) driver ICs associated with specific (uniquely operated) switching power supplies that optimize performance for High Brightness...

OLED Deposition Technology

Low-cost processing methods will be required if the small organic molecule materials currently under development for use in organic light emitting diodes (OLEDs) and other electronics are ever to realize wide spread...

Sliding Mode Pulsed Current Averaging IC Drivers for High-Brightness Light Emitting Diodes

SynDiTec Inc., San Jose, CA This project developed new light emitting diode (LED) driver ICs associated with specific (uniquely operated) switching...

Development of Advanced LED Phosphors by Spray-based Processes for Solid-State Lighting

Cabot Corp., Boston, MA The overarching goal of this project was to develop luminescent materials using aerosol processes for making improved LED devices...

Optical Surface Analysis Advances Defect Inspection of Optoelectronics

Faced with increasing demand, manufacturers of power devices, microdisplays, and high-brightness light-emitting diodes (HB-LEDs) are focusing on tightening manufacturing...

Finisar Corporation, Sunnyvale, California, and COMSOL, Inc., Burlington, Massachusetts

Internal heating is a key issue for vertical cavity surface emitting lasers (VCSELs), a semiconductor micro laser diode that emits light in a cylindrical...

Strobe Traffic Lights Warn of Approaching Emergency Vehicles

Strobe-enhanced traffic signals have been developed to aid in the preemption of road intersections for emergency vehicles. The strobe-enhanced traffic signals can be incorporated into...

Flasher Powered by Photovoltaic Cells and Ultracapacitors

A unique safety flasher powered by photovoltaic cells and ultracapacitors has been developed. Safety flashers are used wherever there are needs to mark actually or potentially hazardous...

Improved Continuity and Short-Circuit Tester

A relatively simple test circuit immediately and automatically provides indications of (1) the continuity (or the lack thereof) of the wires of a two-wire cable, plus (2) a short circuit (if any)...

Video-Based Active Alignment System

An optoelectronic system senses rotational and translational misalignment between two objects. The system might be used in such diverse applications as aligning construction equipment, mating parts of...

Optical Horizontal-Displacement Sensors for Crane Payloads

Sensors made largely of commercially available optical and electronic components are being developed for use in measuring small horizontal displacements of payloads suspended below...