Patent ID: 8288937
Filing Date: 2012-10-16
Classification: C09K,G02F,H01L,Y02B

Abstract:
1. A white LED, comprising: a light emitting element with a light emission peak wavelength in a range of 380 to 420 nm; and a phosphor layer containing three or more types of phosphors including at least a blue phosphor, a green phosphor, and a red phosphor, wherein the phosphor layer has a first phosphor layer containing a mixture of the green phosphor and the red phosphor, and a second phosphor layer containing the blue phosphor and disposed on an opposite side of a side of the light emitting element of the first phosphor layer; wherein a content of the blue phosphor in an entire phosphor contained in the first phosphor layer is 5 mass % or less, or the blue phosphor is not contained in the first phosphor layer, wherein a content of phosphor other than the blue phosphor in an entire phosphor contained in the second phosphor layer is 5 mass % or less, or no phosphor other than the blue phosphor is contained in the second phosphor layer, wherein a ratio of a content of the green phosphor to a content of the red phosphor in the first phosphor layer is in a range of 0.05 to 0.4, and wherein a ratio of a thickness of the second phosphor layer to a thickness of the first phosphor layer is in a range of 1 to 3.