Patent ID: 9046753
Filing Date: 2015-06-02
Classification: G03B,H04N

Abstract:
1. A projector comprising a plurality of light source boxes each of which is provided with at least one solid-state light source, emission colors of solid-state light sources provided in each light source being different from each other, and the projector being constructed to project light emitted from each light source box, wherein a photodetector that detects light from the solid-state light source is provided within each of said light source boxes, and wherein the projector includes a plurality of drive units that supply power to the solid-state light sources provided within said respective light source boxes, and a controller that holds a reference value for the solid-state light source provided within each of said light source boxes for each emission color, that causes said plurality of drive units to supply power to the solid-state light sources provided within said respective light source boxes, and that adjusts amounts of power output from said plurality of drive units such that an output value of the photodetector within each of said light source boxes is at the reference value corresponding to the emission color of the solid-state light source that is a corresponding target of light detection, wherein said plurality of light source boxes include a first light source box accommodating first and second red solid-state light sources that output red light, a second light source box accommodating first and second green solid-state light sources that output green light, a third light source box accommodating both a blue solid-state light source that outputs blue light and a third green solid-state light source that outputs green light, a first light level sensor, as the photodetector, that is provided within the first light source box and that detects red light output from each of the first and second red solid state light sources, a second light level sensor, as the photodetector, that is provided within the second light source box and that detects green light output from each of the first and second green solid-state light sources, and a color sensor, as the photodetector, that is provided within the third light source box and that outputs first and second output values by detecting green light and blue light respectively from the third green solid-state light source and the blue solid-state light source, wherein said plurality of drive units include first to sixth drive units that are provided one-to-one to the first and second red solid-state light sources, to the first to third green solid-state light sources, and to the blue solid-state light source, and that supply power to corresponding solid-state light sources, and wherein said controller holds a first reference value set for the first and second red solid-state light sources, a second reference value set for the first to third green solid-state light sources, and a third reference value set for the blue solid-state light source, adjusts amounts of power output from the first and second drive units such that output values of the first light level sensor are at the first reference value, adjusts amounts of power output from the third and fourth drive units such that output values of the second light level sensor are at the second reference value, adjusts an amount of power output from the fifth drive unit such that the first output value of the color sensor is at the second reference value, and adjusts an amount of power output from the sixth drive unit such that the second output value of the color sensor is at the third reference value.