Patent ID: 8342694

Claim:
A projection apparatus comprising: a plurality of light sources individually emitting light in a plurality of colors; a projection section using light from the light sources to generate images corresponding to respective plural color components of the light source light for each period, to sequentially project the images; a measurement section measuring a brightness of the light sources for each of the plurality of colors at an image projection term at which the projection section projects an image of each of the plural color components; an average brightness calculation section calculating, at each image projection term for a same color component, an average brightness of the brightness measured by the measurement section at the image projection term; and a light source control section adjusting the brightness of the light sources so that an average chromaticity based on the average brightness calculated by the average brightness calculation section and indicating the brightness is equal or approximate to a target chromaticity; wherein the average brightness calculation section repeats, every one frame period in which one image is generated, the operation of calculating, at each image projection term for the same color component, the average brightness of the brightness measured by the measurement section at the image projection term; wherein the projection section divides one frame corresponding to the one frame period into a plurality of subframes, uses the subframes as one period to generate images corresponding to the respective plural color components of the light source light, and sequentially projects the images; and wherein the light source control section adjusts the brightness of the light sources for each of the subframes so that a calculated chromaticity based on the average brightness calculated by the average brightness calculation section and indicating the brightness is equal or approximate to the target chromaticity.