Light source device, projection apparatus, and projection method

A projection apparatus comprising:

• a light source device comprising:
• a plurality of semiconductor light-emitting elements configured to separately emit light of predetermined wavelength regions,
• a reference signal output unit configured to output a reference signal common to the plurality of semiconductor light-emitting elements,
• a control unit configured to convert the reference signal into dimming control signals to be fitted to light-emitting characteristics of the plurality of semiconductor light-emitting elements, and
• a drive unit configured to drive the plurality of semiconductor light-emitting elements on the basis of the dimming control signals converted by the control unit;
• an input unit configured to input an image signal;
• and
• a projection unit configured to form and project a light figure of a color corresponding to the image signal input by the input unit by using light-source light from the light source device.

A projection method for use in a projection apparatus including a plurality of semiconductor light-emitting elements configured to separately emit light of predetermined wavelength regions, an input unit configured to input an image signal, and a projection unit configured to form and project a light figure of a color corresponding to the image signal input by the input unit by using light-source light from the plurality of semiconductor light-emitting elements, the method comprising:

• outputting a reference signal common to the plurality of semiconductor light-emitting elements;
• converting the output reference signal into dimming control signals to be fitted to light-emitting characteristics of the plurality of semiconductor light-emitting elements;
• and
• driving the plurality of semiconductor light-emitting elements on the basis of the dimming control signals.