Patent ID: 9304382
Filing Date: 2016-04-05
CPC Classification: F21S,G02B,G03B,H04N

Claim Text:
1. A projector comprising: a light source device including at least one excitation light source emitting excitation light; a phosphor disk on which a phosphor that converts the excitation light into fluorescence is continuously formed in a circumferential direction of the phosphor disk; a motor unit rotating the phosphor disk in the circumferential direction around an axis that runs through a center of the phosphor disk; a light modulation device generating an image light through modulation of light including at least the fluorescence; and a projection optical system projecting the image light, wherein if the number of rotations of the phosphor disk reaches a predetermined number that is smaller than a target number, wherein the number of rotations is determined from a revolutions per minute (rpm) of the phosphor disk, the excitation light source is turned on, and if the rpm of the phosphor disk is increased after reaching the predetermined number, an output of the excitation light source is increased.