Patent ID: 8210691

Claim:
A projector apparatus comprising: a semiconductor light source configured to emit light beams of a plurality of color components, emissions of the light beams being controlled individually; a projection unit configured to form images respectively corresponding to the color components of the semiconductor light source using the light beams from the semiconductor light source for each of a plurality of frames and to sequentially project the images; a driving unit configured to drive the semiconductor light source so that the light beams of the color components are emitted as light pulses having respectively predetermined pulse widths for a period in which the projection unit projects each of the images of the color components; a detector configured to detect deterioration levels of the semiconductor light source respectively for the color components, the detector comprising a measurement unit configured to measure illumination values of the semiconductor light source for each of the light beams of the color components; a controller configured to control the pulse widths of the light beams emitted from the semiconductor light source based on the deterioration levels; and a storage unit configured to store initial control information for the pulse widths controlled by the controller for the period in which the projection unit projects each of the images of the color components; wherein the controller comprises: a determination unit configured to determine whether or not each of the illumination values of the light beams of the color components emitted from the semiconductor light source is smaller than a predetermined illumination value; and a reducing unit configured to narrow a pulse width of a color component corresponding to an illumination value larger than the predetermined illumination value when the determination unit determines that the illumination value of one of the color components from the semiconductor light source is lower than the predetermined illumination value.