| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED emitting white output light using a phosphor with high luminance efficiency and good light output stability. <P>SOLUTION: A device and a method for emitting output light utilize an orange/red light emitting ZnSe<SB>0.5</SB>S<SB>0.5</SB>:Cu, Cl phosphor material (118) and a green light emitting BaSrGa<SB>4</SB>S<SB>7</SB>:Eu phosphor material (119) to convert some of the original light emitted from a light source of the device to a longer wavelength light to change the optical spectrum of the output light. The device and the method can be used to produce white color light using the light source, which may be a blue light emitting diode (LED) die. The orange/red light emitting ZnSe<SB>0.5</SB>S<SB>0.5</SB>:Cu, Cl phosphor material and the green light emitting BaSrGa<SB>4</SB>S<SB>7</SB>:Eu phosphor material are included in a wavelength-shifting region optically coupled to the light source. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
