IMAGE READING DEVICE, LIGHT SOURCE CONTROL METHOD DURING IMAGE READING, AND LIGHT SOURCE CONTROL PROGRAM

• Main Authors: KAWANO TAKUYA, HABA KENYA, TSUTSUMI TAKAHIRO, ISHIGURO KAZUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 25.01.2018
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CALCULATING; CINEMATOGRAPHY; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

PROBLEM TO BE SOLVED: To provide an image reading device or the like capable of reading a reflection light beam by a reading sensor formed by a one-line contact image sensor by irradiating an original with light by sequentially turning on a plurality of light sources and capable of accurately detecting inclination of the original.SOLUTION: An image reading device comprises: a plurality of light sources 206a; a reading sensor 206c formed by one-line contact image sensor for reading an image of an original 300 by sequentially turning on the light sources; inclination detection means 100 that detects an inclination of the original from a gradation change of the image in one end or both ends of a sub-scanning direction of the original to be read by the reading sensor; and optical control means 100 that continuously turns on any one of the plurality of light sources when reading one end or both ends of the sub-scanning direction of the original by the reading sensor, and sequentially switches the plurality of light sources so as to be turned on when reading an inner region of the original excluding one end or both ends in the sub-scanning direction.SELECTED DRAWING: Figure 4 【課題】複数の光源を順次点灯して原稿に光を照射し、反射光を１ライン密着イメージセンサからなる読み取りセンサで読み取る画像読み取り装置であって、原稿の傾き検出を精度良く行うことができる画像読み取り装置等を提供する。【解決手段】複数の光源２０６ａと、これら光源を順次点灯させて原稿３００の画像を読み取る１ライン密着イメージセンサからなる読み取りセンサ２０６ｃと、読み取りセンサにより読み取られた原稿の副走査方向の一端または両端における画像の階調変化から、原稿の傾きを検出する傾き検出手段１００と、読み取りセンサによる原稿の副走査方向の一端または両端の読み取り時には、複数の光源のうちいずれかの光源を連続して点灯させ、副走査方向の一端または両端を除く原稿の内部領域の読み取り時には、複数の光源の順次点灯に切り替える光源制御手段１００を備える。【選択図】図４