| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a white light emitting solid-state lamp having an output of at least 75 lumens per watt at a 20-milliampere drive current. <P>SOLUTION: The lamp includes a light-emitting diode 21, an encapsulant, and a header. The diode includes a conductive silicon carbide substrate for electrical contact, and a group III nitride active portion on a silicon carbide substrate for generating a desired frequency of photons under the application of current across the diode. The header includes a reflective cup 22 for supporting the diode and for providing electrical contact to the diode and to the active portion. The encapsulant includes a phosphor 31 and is present in at least a portion of the encapsulant for generating a responsive frequency when the phosphor is excited at the frequency emitted by the diode. <P>COPYRIGHT: (C)2011,JPO&INPIT |
