Patent ID: 9662906
Date: 2017-05-30
CPC Classifications: B41J

Claim:
1. A light illuminating apparatus for illuminating light in line shape extending in a first direction on an illumination surface, the light illuminating apparatus comprising: an elongated substrate extending in the first direction; a plurality of light emitting diode (LED) light sources placed and arranged on a surface of the substrate at a preset interval along the first direction, and configured to emit the light in line shape; a heat transfer means of which at least a part is in contact with the substrate, the heat transfer means extending in a second direction perpendicular to the first direction from the substrate, and configured to transfer heat generated from the LED light sources in the second direction; a heat radiation means having a plurality of heat radiation fins protruding in a third direction perpendicular to the first direction and the second direction from the heat transfer means and installed to extend in the second direction; an illuminator having a box shape and configured to house the substrate, the heat transfer means and the heat radiation means and to form a wind tunnel at an area in which the heat radiation means is formed; and a centrifugal fan located in the second direction between the substrate and the heat radiation means, and configured to draw air from outside the illuminator into the wind tunnel to generate an air current in the second direction within the wind tunnel.