Subjects stared into a light box containing light-emitting diodes (LEDs) for 60 minutes in each experiment.
Light-emitting diodes--semiconductors that emit light when electricity passes through them--have been around since the 1960s.
Made by Dutch electronics giant Philips, the bulb swaps filaments for light-emitting diodes to provide illumination.
The use of organic light-emitting diodes allows screens to be made thinner and more flexible than before.
It uses rows of light-emitting diodes that cost only 3 cents each to stimulate the fluorescent tags.
Light-emitting diodes have progressed from simple red indicators on electronic products to become torches, streetlights and car headlights.
Researchers are working on a new generation of white light-emitting diodes (LEDs) that would be much more efficient than existing light bulbs.
This printing process is already used in organic solar cells and organic light-emitting diodes (OLEDs) that form the displays of mobile phones.
But high-power light-emitting diodes (LEDs) promise a brighter future in outdoor illumination.
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Earlier this month, Dr. Bruchas and his colleagues made public their development of light-emitting diodes thousands of times smaller than those currently available commercially.
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Strips of eco-friendly, light-emitting diodes, known as LED lighting, are flexible and can be used to illuminate architectural details in a rainbow of colors.
Goeken's PolyBrite International of Naperville, Ill. looks to leapfrog the little fluorescents with energy-saving bulbs that rely on light-emitting diodes, which are glowing semiconductor chips.
Richardson expects that transparent Organic Light-Emitting Diodes (OLEDs) will be embedded in structural glass, so that flat clear panels will provide a plethora of lighting options.
As a result devices that use them need fewer LEDs (light-emitting diodes) to provide backlighting, allowing the screen to take up less room and use less power.
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It was one of the early leaders in light-emitting diodes.
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All this lighting is done with light-emitting diodes, or LEDs.
The new technology, called an epidermal electronic system (EES), is based on a new class of micro-electronics that integrates miniature sensors, light-emitting diodes, tiny transmitters and refined wire-filament receivers.
Sibling semiconductors are used in light-emitting diodes, solid-state lasers and other technologies that generate heat and light far more precisely and efficiently than conventional welders, torches, ovens and bulbs.
Photo-or electroluminescent substances that can be put straight on to a silicon chip might make cheaper light sources than the light-emitting diodes used now, since these have to be connected separately.
The most promising alternatives are light-emitting diodes (LEDs).
Now they have something that works like a flatbed document scanner, with a scanning head containing either six or 12 light-emitting diodes, each emitting light of a specific wavelength between 350 nanometres (ultraviolet) and 800 nanometres (infra-red).
People linger delightedly at the Hotel Habitat by Enric Ruiz-Geli with Cloud 9 Acconci Studio and Ruy Ohtake, a miniature simulacrum of a proposed four-star hotel for Barcelona covered with a web of 5, 000 winking light-emitting diodes, or LEDS, powered by solar cells for a nighttime display of glowing colors.
There have been several attempts to develop new light-bulbs in recent years - Light Emitting Diodes (LEDs) have come a long way since they were best known for being indicator lights in electronic devices.
The maker of light emitting diodes, or LED, drivers, issued a second-quarter warning, lowering its revenue projection.
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