Patent ID: 8259237
Filing Date: 2012-09-04
Classification: G09G,H04N

Abstract:
1. An image display apparatus for displaying an image on a projection surface by applying a laser beam onto said projection surface, comprising: a laser light source configured to emit said laser beam in accordance with a drive current; a scanning device configured to conduct a laser beam scan by applying said laser beam to a prescribed range on said projection surface, said scanning device applying said laser beam selectively for each pixel of said image in a prescribed cycle; a beam splitting element configured to split incident said laser beam into a first laser beam directed toward said projection surface and a second laser beam directed toward a direction different from a direction toward said projection surface; a detector having a detection surface configured to detect reflected said laser beam, said detection surface including a first detection region including a region in which said second laser beam is scanned as said first laser beam is scanned in a projection range of said image, and a second detection region arranged around said first detection region and on which said second laser beam is incident at prescribed timing by scanning of said laser beam by said scanning device; a position detector configured to detect a position of said scanning device based on timing at which said laser light source is driven and timing at which said laser beam is incident on said first detection region; and a laser control unit configured to adjust timing of emission of said laser beam based on the position of said scanning device and adjusting an intensity of said laser beam emitted by said laser light source based on an intensity of said laser beam detected in said second detection region.