Patent ID: 9028083
Filing Date: 2015-05-12
Classification: F21K,H01L

Abstract:
1. An assembly for use in a remote phosphor LED device in which the assembly is illuminated with LED light having an emission peak in a range from 400 to 500 nm, the assembly comprising: a phosphor layer configured to absorb a portion of the LED light and emit phosphor light in response to the absorbed LED light; and a broadband reflector attached to the phosphor layer; wherein the broadband reflector has a reflectivity of at least 90% for the LED light and for the phosphor light; and wherein the phosphor layer has a phosphor concentration and physical thickness tailored to provide a single pass transmission of the LED light through the phosphor layer of T, where T is in a range from 30 to 65% single pass transmission through the phosphor layer.