Patent ID: 9001394
Filing Date: 2015-04-07
Classification: H04N

Abstract:
1. An image scanning apparatus which scans an image of a document and converts the scanned image into digital data, the image scanning apparatus comprising: a plurality of light sources that emit light; a light guide unit that diffuses the light emitted by the light sources, wherein the light guide unit comprises a first light guide and a second light guide that is oriented parallel to the first light guide to evenly diffuse light over the document during a scanning; a sensor unit that senses image data from the document by recognizing light reflected from the document by being diffused by the light guide unit; a control unit that controls the turning on of the light sources, wherein the control unit alternately turns on or off the light sources such that at least one light source of the plurality of light sources is turned on when at least one other light source of the plurality of light sources is turned off to reduce a temperature of heat generated by each of the plurality of light sources; and a heat dissipation plate facing the plurality of light sources and having a size based on a turn-on duty cycle of the light sources.