| 摘要 |
PROBLEM TO BE SOLVED: To provide an exact control technique for each type of light-emitting elements on the basis of synthetic light from plural types of light-emitting elements having different emission wavelengths.SOLUTION: A light source device comprises: an LD array 31 including two types of LDs having wavelengths different from one another in a blue region; a mirror array 32 collecting synthetic light emitted by the LD array 31 into the same light flux and emitting the synthetic light; a color wheel 38 in which, with respect to the emitted light, a filter 38p transmitting only a higher wavelength therethrough and a filter 38s transmitting only a lower wavelength therethrough are selectively arranged; an illuminance sensor LS detecting illuminance of transmitted light respectively at the timing when the light penetrates the filter 38p and the timing when the light penetrates the filter 38s; a CPU 18 calculating a synthesis ratio of the synthetic light based on the measurement result, and controlling power for driving the LD array 31 according to the synthesis ratio obtained; and a projection processing part 13. |
