WHITE-LIGHT EMITTING DIODES COMPRISING LASER SOURCE AND METAL OXIDE CRYSTAL PHOSPHOR

A light source includes at least one solid-state laser source of a coherent excitation radiation, and at least one single crystal phosphor for at least partial conversion of the coherent excitation radiation into an extracted light primarily composed of wavelengths in the visible spectrum to the human eye. The at least one solid-state laser source of the coherent excitation radiation has the maximum emission of light wavelengths in the range of 340 nm to 480 nm. The extracted light from the at least one single crystal phosphor is primarily of white colour with a correlated colour temperature ranging from 2700 K to 10000 K. The at least one single crystal phosphor is connected to a cooler. At least a portion of the at least one single crystal phosphor surface is roughened to create colour-homogenized scattered extracted light and/or to maximize the extracted light emission in the desired direction. The at least one single crystal phosphor is created with the oxide-type compound of the general formula (Ax, Lu1-x)a Al b O12:Cec. L'invention concerne une source de lumière (1) qui est basée sur une source laser à l'état solide à haute efficacité (2) de rayonnement cohérent d'excitation (3) et sur un phosphore monocristallin (4) qui est usiné sous la forme d'un élément optique pour permettre une paramétrisation de la lumière émise. Le phosphore monocristallin (4) est produit à partir d'un matériau monocristallin sur la base de grenats ayant la formule générale (Ax, Lu1-x)aAlbO12:Cec ou à partir d'un matériau monocristallin sur la base d'une structure pérovskite ayant la formule générale B1-qAIO3:Dq. Cette source de lumière (1) efficace doit être utilisée, par exemple, dans l'industrie automobile.