Luminus Devices, Inc., the maker of the Big Chip LEDs(TM), has announced it has tripled the brightness of its green LEDs over the last five years, and expects to at least double it again. Green light is reportedly considered by the industry as the major limiting factor in replacing high pressure mercury lamps in projection displays. According to Luminus, its latest achievements in Pure Green LED output combined with its thermally-enhanced packaging technology allows its projection-optimized RGB chipsets to achieve new performance levels in portable, home video, video walls and mainstream business and education projection systems.
As an example, the company's latest 5.4 mm2 green LED can output up to 3000 lumens. It therefore has at a current density of 3.0 A/mm2. Luminus says that the chipset allows system manufacturers to design portable LED projectors with brightness greater than 700 lumens. This is reportedly a 40% improvement over products introduced only 1 year ago.
"The rapid pace of improvement of our Pure Green LEDs is a testimony to the large untapped potential of this technology," said Arvind Baliga, VP of Engineering. "Alternative approaches such as phosphor conversion technologies rely on mature platforms with limited upside potential and also come with a broad spectrum that results in increased optical losses of up to 20%. Our customers recognize that Luminus Projection Chipsets enable the brightest projectors today and more importantly, place them on a faster trajectory to transition their portfolio to a lamp-free model. Increased investment in R&D and rapid prototyping will dramatically accelerate our progress in reaching brightness targets needed to move into the business and education segments."
"Luminus' world's brightest green LED just got better, and the best testimony to this achievement is over 1 million consumer and professional of lamp-free projection displays that have been deployed using our technology -- a market that did not even exist only 4 years ago," said Stephane Bellosguardo, Director of Global Product Marketing at Luminus Devices. "After virtually eliminating lamps in markets such as video walls, our technology is now gaining similar momentum in consumer video, education and business projection markets. With RoHS exemptions for most high pressure mercury lamps set to expire in 2015, these latest advancements in Pure Green LED technology provide our customers with a path towards an environmentally friendly light source that combines cost-effectiveness and performance."
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