Patent ID: 7828993
Filing Date: 2010-11-09
Classification: C09K,H01L,Y02B

Abstract:
1. A phosphor mixture for converting ultraviolet light or blue light emitted from a light emitting element into a visible white radiation, comprising: a first phosphor selected from a group consisting of an alkaline earth metal antimonate comprising a fluoroantimonate, and a derivative of the alkaline earth metal antimonate comprising a fluoroantimonate; and a second phosphor selected from a group consisting of a manganese(IV)-activated compound comprising an antimonate, a manganese (IV)-activated compound comprising a silicate-germinate, and a manganese(IV)-activated compound comprising an aluminate; and a third phosphor selected from a group consisting of a europium-activated silicate-germanate, and a sensitizer selected from a group consisting of Eu(II) and Mn(II) as a second activator and having an orange color, an orange-red color, or a dark red color in a spectrum range over 600 nm, wherein the third phosphor is represented by general formula wherein Me Me X comprises Cl, F, or Br, 0≦x≦10, 0≦y≦12, 0<a≦6, 0<n≦24, 0≦m≦16, and B may be completely or partially replaced with P, Si, Ga, or Al and may be partially replaced with V, Nb, Ta, Ge, W, or Mo, and wherein the phosphor mixture has different emission bands that is brought to a state of broad continuous emission of about 380 to 780 nm, the phosphor mixture having a color temperature of about 10,000 K with blue-white color to 6,500 K with daylight color and having a color temperature of about 3,000 K with warm white color to 2,000 K with twilight color of reddish yellow by virtue of the superposition of the emission band.