Toshiba recreates 'sunlight' with white light-emitting diode material.(Optoelectronics)

New Materials Japan, April, 2005

Toshiba Corp has developed a fluorescent substance which can be used in the production of white light-emitting diodes (LEDs) which produces a white light of near-sunlight quality when it is operated in combination with blue LEDs, and which is almost twice as bright as existing white LEDs

Conventional white LEDs are made using a fluorescent material which converts blue to yellow, resulting in an artificial white light that does not contain green or orange. As a result, red and green objects appear dark in this light, and eyes tire easily when exposed to it. However, Toshiba's diode makes use of a novel fluorescent material which is able to transform blue light into a variety of other colours, ranging from blue through yellow and orange, the company says....

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