Patent ID: 8643921
Filing Date: 2014-02-04
Classification: H04N

Abstract:
1. An image reader comprising: a reading unit configured to read an image on a document sheet while moving relative to the document sheet in an auxiliary scanning direction, a driving current supplying unit configured to supply a predetermined driving current to each light source; a light-emitting-time determining unit configured to determine a light-emitting time separately for each light source and a non-light-emitting time, in a predetermined reading period, a light-emitting-timing setting unit configured to divide the non-light-emitting time into a plurality of segmental non-light-emitting times and set a light-emitting moment separately for each light source as a moment to emit the light in the predetermined reading period, such that the segmental non-light-emitting times are arranged in a dispersed manner in the predetermined reading period; and a controller configured to control each light source to emit the light during the light-emitting time determined by the light-emitting-time determining unit at the light-emitting moment set by the light-emitting-timing setting unit.