| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve efficiency in taking out of light while reducing color irregularity of light which outgoes from a case. <P>SOLUTION: This device is provided with a case 4 where an opening 3 is formed for taking out the light emitted from an LED chip 2, a plate member 6 which is interposed between the LED chip 2 and the opening 3, and which emits wavelength conversion light when receiving the light emitted from the LED chip 2, and a light diffusion plate 5 which diffuses light going from the plate member 6 toward the opening 3. The LED chip 2 and the plate member 6 are arranged separated from each other to make an incident angle of light onto the plate member 6 entirely small, and to make a path difference of light inside the plate member 6 small. <P>COPYRIGHT: (C)2008,JPO&INPIT |
