| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce color phase irregularity in a light emitting device for emitting light by mixing light of plural colors. <P>SOLUTION: A light emitting device 1 comprises an LED 3, and a wavelength conversion member 5 for converting light emitted from the LED 3 into light with a wavelength of a different color. The wavelength conversion member 5 has a gutter-like shape projecting on a light guide face side. By such a constitution, a large amount of light emitted from the LED 3 is incident on the wavelength conversion member 5 at a right angle. Because an optical path length difference of light propagating through the wavelength conversion member 5 becomes small, the light incident on the wavelength conversion member 5 is converted into light with a wavelength at a similar level. Therefore, color phase irregularity of the light guided from the wavelength conversion member 5 can be reduced. Also, the wavelength conversion member 5 is formed into a gutter-like shape and therefore the wavelength conversion member 5 is also arranged on the side of the LED 3. Thereby, the light can be also emitted on the side of the light emitting device 1, and distribution of light radiated on the side can be controlled by adjusting a curvature of the wavelength conversion member 5. <P>COPYRIGHT: (C)2013,JPO&INPIT |
