| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress color shift by adjusting light beams radiated from a plurality of LED elements into one so as to obtain a mixed color. <P>SOLUTION: A device is provided with three light emitting diode elements 2c, 2d and 2e. A hologram element 2h having diffraction gratings 2g and 2i corresponding to wavelengths of the respective radiated light beams is arranged in a region through which the radiated light beams from the light emitting diode elements 2c, 2d and 2e pass. The hologram element 2h mix the respective radiated light beams. Thus, color shift is suppressed by adjusting the light beams radiated from a plurality of the LED elements into one so as to obtain the mixed color. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
