Patent ID: 7703929
Filing Date: 2010-04-27
Classification: G03B,H04N

Abstract:
1. An edge blending device which suppresses an increase in a luminance of a projection screen in an overlap area in which projection lights projected from a plurality of projection units onto a screen overlap each other, characterized by comprising: a light shielding means holder which includes light shielding pattern formation portions which can form a light shielding pattern corresponding to the projection lights forming the overlap area; a light shielding pattern drive controller which controls a drive of the light shielding means holder in such a way that the light shielding pattern formation portions are positioned corresponding to the projection lights from the projection units; and initial position detection means for detecting an initial position of the light shielding means holder, wherein the light shielding pattern drive controller, with the initial position detected by the initial position detection means as a reference, controls the drive of the light shielding means holder.