US 7,609,427 B2
Image display apparatus and image display method
Jun Someya, Tokyo (Japan); Shuichi Kagawa, Tokyo (Japan); Hideki Yoshii, Tokyo (Japan); Tomohiro Sasagawa, Tokyo (Japan); and Hiroaki Sugiura, Tokyo (Japan)
Assigned to Mitsubishi Electric Corporation, Tokyo (Japan)
Filed on Jun. 15, 2007, as Appl. No. 11/812,215.
Claims priority of application No. 2006-199021 (JP), filed on Jul. 21, 2006.
Prior Publication US 2008/0018972 A1, Jan. 24, 2008
Int. Cl. G02B 26/08 (2006.01)
U.S. Cl. 359—204.1 18 Claims
OG exemplary drawing
 
1. An image display apparatus comprising:
a light source which includes a plurality of light emitting elements for emitting a plurality of light beams arranged in a direction corresponding to a sub-scanning direction on an image display screen;
a light source driver which individually modulates intensities of the plurality of light beams in accordance with input image data;
a light scanning unit which performs main scanning and sub-scanning in such a way that light irradiation positions on the image display screen that are irradiated with the plurality of light beams are moved in a main scanning direction on the image display screen during the main scanning and the light irradiation positions are moved in the sub-scanning direction during the sub-scanning;
the image display screen which receives the plurality of light beams scanned in the main scanning direction and the sub-scanning direction by the light scanning unit, thereby causing an image to be displayed; and
a controller which controls the light scanning unit so as to perform one sub-scanning each time that the plurality of light beams are scanned in the main scanning direction;
wherein, in one frame period, a distance of movement of the light irradiation positions on the image display screen moved by one sub-scanning is a distance obtained by multiplying an interval between adjacent two scanning lines in the sub-scanning direction on the image display screen by a predetermined integer which is an integer smaller than number of the plurality of light beams arranged in the direction corresponding to the sub-scanning direction.