| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an illumination device with wavelength conversion that can be driven with an increased current to produce a higher radiance by using a wavelength converting element that is physically separated from a light source. <P>SOLUTION: An illumination device uses the wavelength converting element, such as a phosphor layer, which is physically separated from the light source, such as one or more light emitting diodes, a Xenon lamp or a Mercury lamp. The wavelength converting element is optically separated from the light source, so that the converted light emitted by the wavelength converting element is prevented from being incident on the light source. Accordingly, the temperature limitations of the wavelength converting element are removed, thereby permitting the light source to be driven with the increased current to produce the higher radiance. Moreover, by optically separating the wavelength converting element from the light source, the conversion and recycling efficiency of the device is improved, which also increases radiance. <P>COPYRIGHT: (C)2012,JPO&INPIT |
