Brightest LED Puts Light Bulbs in the Shade

Jun 14, 2005

Osram has developed the world’s brightest white light-emitting diode. Known as Ostar Lighting, this LED supplies 200 lumens, thus literally putting light bulbs and neon lamps in the shade. Previously, the brightest LED from the Siemens subsidiary Osram had an output of 120 lumens. As far as its luminosity is concerned, Ostar Lighting can therefore compete with conventional lamps. The system has an average service life of 50,000 hours, or almost 18 years if used for eight hours a day. The new LED is currently being prepared for series production and is scheduled for market launch in early 2006.

The researchers at Osram Opto Semiconductors in Regensburg achieved this extraordinary level of brightness by channeling almost all of the light that is generated by a semiconductor chip at 700 milliampères to the outside. A number of different techniques were used to accomplish this feat. The chip is coated with a metal reflector and a specially structured, microprismic surface that steer light rays directly upward. The chip radiates blue light that is changed into white light by a second, yellow coating.

Because LED technology is still expensive, the extremely bright light-emitting diode will initially be used for special lighting applications such as spotlights, reading lamps, designer lamps and safety lamps. Since the Ostar Lighting system measures only 1 x 3 cm and has an installation depth of six millimeters, it opens up new design opportunities for using LEDs in furniture or buildings, for example.

Explore further: OkCupid admits toying with users to find love formula

add to favorites email to friend print save as pdf

Related Stories

Light pollution alters reproduction cycle in lemurs

Jul 02, 2014

Besides obscuring the stars, light pollution can also disrupt the reproduction of light-sensitive animals. French scientists have shown that light pollution can override the natural reproductive cycle of ...

LEDs: Better red makes brighter white

Jun 23, 2014

Chemists at Ludwig-Maximilians-Universitaet (LMU) in Munich have developed a novel type of red phosphor material, which significantly enhances the performance of white-emitting LEDs.

Recommended for you

Chinese smartphone makers win as market swells

1 hour ago

Chinese smartphone makers racked up big gains as the global market for Internet-linked handsets grew to record levels in the second quarter, International Data Corp said Tuesday.

Full appeals court upholds labels on meat packages

1 hour ago

(AP)—A federal appeals court has upheld new government rules that require labels on packaged steaks, ribs and other cuts of meat to say where the animals were born, raised and slaughtered.

Connected devices have huge security holes: study

1 hour ago

The surge Web-connected devices—TVs, refrigerators, thermostats, door locks and more—has opened up huge opportunities for cyberattacks because of weak security, researchers said Thursday.

BlackBerry to buy Germany's Secusmart

1 hour ago

(AP)—German voice and data encryption specialist Secusmart, which helps equip the German government with secure smartphones, says it's being acquired by BlackBerry for an undisclosed sum.

India's Flipkart raises $1 bn to tackle Amazon

3 hours ago

India's top e-commerce company Flipkart said Tuesday it had raised $1 billion (60 billion rupees) in funds as it battles US giant Amazon for supremacy in the hyper-competitive local market.

User comments : 0