LIGHT SOURCE WITH LIGHT-EMITTING COMPONENT Russian patent published in 2005 - IPC

FIELD: devices built around diodes emitting blue and/or ultraviolet light.

SUBSTANCE: proposed light source emitting light in ultraviolet or blue light region (from 370 to 490 nm) and capable of producing high-efficiency white light affording control of luminance temperature within comprehensive range has light-emitting component that emits light in first spectral region and phosphor of group of optosilicate alkali-earth metals and that absorbs part of source light and emits light in other spectral region. Novelty is that phosphor used for the purpose is, essentially, europium activated bivalent optosilicate of alkali-earth metal of following composition: (2-x-y)SrO · x(Ba_u, Ca_v)O · (1-a-b-c-d)SiO₂ ·aP₂O₅bAl₂O₃cB₂O₃dGeO₂ : yEu²⁺ and/or (2-x-y)BaO · x(Sr_u, Ca_v)O · (1-a-b-c-d)SiO₂ ·aP₂O₅bAl₂O₃cB₂O₃dGeO₂ : yEu²⁺.

EFFECT: enhanced efficiency, enlarged luminance temperature control range.

14 cl, 10 dwg