Patent ID: 8651669
Filing Date: 2014-02-18
Classification: G03B,G09G,H04N

Abstract:
1. A projection apparatus that displays a projection image on a projection surface, comprising: a light source unit configured to output light for projecting the projection image; a color separation unit configured to separate the light output from the light source unit into light beams of a plurality of colors; a plurality of display units configured to form images corresponding to the light beams of the plurality of colors; a color synthesis unit configured to synthesize the light beams of the plurality of colors having passed through the plurality of display units; a projection unit configured to project light obtained through synthesis by the color synthesis unit onto the projection surface; a plurality of detection units configured to detect fluctuations in light quantity of the light beams of the plurality of colors having passed through the plurality of display units and yet to be input to the color synthesis unit; and a determination unit configured to analyze detection results obtained by the plurality of detection units, and determine whether flicker caused by the plurality of display units or flicker caused by the light source unit is occurring in the projection image, wherein the determination unit determines whether flicker caused by the plurality of display units or flicker caused by the light source unit is occurring by comparing respective frequencies of the fluctuations in the light quantity of the light beams of the plurality of colors detected by the plurality of detection units.