Patent ID: 7931378

Claim:
A projector comprising: a control system comprising: a principal light source for outputting light to a light path used for image projection, an auxiliary light source for outputting light to the light path so that the light output by the principal light source and the light output by the auxiliary light source are combined in the light path, and a control section for controlling light intensity of the auxiliary light source; and a projection section for projecting an image using the light from the light path, the projection section comprising: a color separation optical system for separating the light from the light path into separate colored light beams, and a color combining optical system for combining the separate colored light beams into one light beam, wherein the control section performs one of control of setting combined light intensity obtained by combining light intensity of the principal light source and the light intensity of the auxiliary light source with each other in a certain range and control of setting the combined light intensity to be equal to or higher than a predetermined value.