Patent ID: 8632202

Claim:
A white LED for a backlight of a liquid crystal display device, comprising: a light-emitting element including at least one selected from an ultraviolet light-emitting diode, a purple light-emitting diode, an ultraviolet light-emitting laser, and a purple light-emitting laser, and having a light emission wavelength in a range of 360 to 430 nm; and a phosphor layer containing a green phosphor, a blue phosphor, and a red phosphor, wherein an emission spectrum of the white LED comprises: a first light emission peak group including at least one light emission peak having a maximum intensity in a range of 430 to 470 nm; a second light emission peak group including at least one light emission peak having a maximum intensity in a range of 520 to 560 nm; a third light emission peak group including two or more linear light emission peaks in a range of 580 to 740 nm; and a valley which is between the first light emission peak group and the second light emission peak group and has a minimum intensity in a range of 480 to 500 nm, wherein, in case that the first light emission peak group is determined to have a maximum intensity P1 of 1.0, a maximum intensity P2 of the second light emission peak group is 0.1≦P2≦1.0; a maximum intensity P3 of the third light emission peak group is 0.2≦P3<3.0; and a minimum intensity V1 of the valley is 0.01≦V1≦0.6, wherein an intensity of 600 nm is 50% or less of the maximum intensity P3 of the third light emission peak group, and wherein a content of the green phosphor in the phosphor layer relative to the total amount of the phosphors is in a range of 1 to 10 wt %, a content of the blue phosphor in the phosphor layer relative to the total amount of the phosphors is in a range of 40 to 80 wt %, and a content of the red phosphor in the phosphor layer relative to the total amount of the phosphors is in a range of 10 to 50 wt %.