Patent ID: 8896004

Claim:
A white LED comprising at least one light emitting element selected from ultraviolet light emitting diodes, purple light emitting diodes, ultraviolet light emitting lasers, and purple light emitting lasers, and a phosphor layer, the phosphor layer comprising a green phosphor satisfying general formula 1, a blue phosphor satisfying general formula 2 or 3, and a red phosphor satisfying general formula 4: green phosphor: a trivalent cerium- and terbium-activated rare earth boride phosphor substantially represented by M 1-x-y Ce x Tb y BO 3 general formula 1 wherein M represents at least one element selected from Sc (scandium), Y (yttrium), La (lanthanum), Gd (gadolinium), and Lu (lutetium); and x and y are respective numbers of 0.05<x<0.1 and 0.05<y<0.2; blue phosphor: a divalent europium-activated halophosphate phosphor substantially represented by (M2,Eu) 10 (PO 4 ) 6 —Cl 2 general formula 2 wherein M2 represents at least one element selected from Mg (magnesium), Ca (calcium), Sr (strontium), and Ba (barium) or a divalent europium-activated aluminate phosphor substantially represented by a (M3,Eu)O. b Al 2 O 3 general formula 3 wherein M3 represents at least one element selected from Mg (magnesium), Ca (calcium), Sr (strontium), Ba (barium), Zn (zinc), Li (lithium), Rb (rubidium), and Cs (cesium); and a and b are respective numbers of 0<a, 0<b, and 0.2≦a/b≦1.5; and red phosphor: a europium-activated lanthanum oxysulfide phosphor represented by (La 1-x ,Eu x ) 2 O 2 S general formula 4 wherein x is a number satisfying 0.01<x<0.15, wherein the white LED is for backlight in liquid crystal display devices.