Patent ID: 9294749
Filing Date: 2016-03-22
CPC Classification: G02B,G03B,G09G,H04N

Claim Text:
1. A projection apparatus comprising: a light source unit including a plurality of semiconductor light-emitting elements; an input unit configured to input a video signal; a projecting unit configured to form an optical image according to the video signal input by the input unit and to project the optical image, using light from the light source unit; a light-source controlling unit configured to simultaneously drive the semiconductor light-emitting elements included in the light source unit and to generate a sync signal for use in projecting a stereoscopic image; and a gradation controlling unit configured to correct gradations ranging from zero gradation to a gradation according to a luminance level of the sync signal, to a specific gradation value according to the sync signal, with respect to a color complimentary to a color of the sync signal.