Ceramic wavelength-conversion plates and light sources including the same

摘要

A wavelength-conversion plate is described herein. The wavelength conversion plate may include a converter of a first ceramic material and a reflector of a second ceramic material. The first ceramic material converts the primary light emitted by a light source such as a light emitting diode (LED) into a secondary light and the second ceramic material reflects the secondary light emitted by said converter. Preferably, the converter is inlaid into the reflector so that the reflector surrounds an outer edge of the converter. Such a configuration has an advantage of reducing unwanted side emissions from the converter.

主权项

1. A wavelength-conversion plate, comprising:
a solid, self-supporting flat structure having a reflector and a plurality of substantially fully dense, sintered ceramic converters, said converters comprising a ceramic material capable of converting incident primary light to a secondary light, wherein each converter is different from every other converter with regard to its ceramic material or an activator concentration of its ceramic material and said converters have a form of nested concentric cylinders; said reflector surrounding said converters and comprising a substantially fully dense, sintered ceramic material capable of reflecting secondary light emitted by said converters, said converters being inlaid into said reflector; and an interface between at least one converter and said reflector, wherein said reflector abuts said at least one converter and said converters are retained by said reflector without use of an adhesive or bonding agent.