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热词
    • 10. 发明授权
    • Image reading apparatus, image forming apparatus, and image reading method
    • 图像读取装置,图像形成装置和图像读取方法
    • US08467110B2
    • 2013-06-18
    • US12753679
    • 2010-04-02
    • Yoko Tanaka
    • Yoko Tanaka
    • H04N1/04
    • H04N1/00708H04N1/0071H04N1/00713H04N1/00734H04N1/00737H04N1/00748H04N1/0075H04N1/00758H04N1/02865H04N1/1013
    • An image reading apparatus of the present invention includes a document placing unit on which a document is placed, a light source unit in which light sources are arrayed in a depth direction, a light source drive unit that drives the light sources, and a light source control unit that controls so that the light sources are divided into a plurality of groups to be driven. An image sensor is provided at a position capable of receiving light emitted from the light sources and reflected by the document on the document placing unit. Further, the document size is detected through detection of a position of an edge of the document from an output signal from the image sensor. Then, the light source drive unit is controlled so that, when the image is to be read, the light sources are activated to illuminate the document.
    • 本发明的图像读取装置包括放置文件的原稿放置单元,深度方向排列有光源的光源单元,驱动光源的光源驱动单元,以及光源 控制单元,其控制使得光源被分成多个要驱动的组。 图像传感器设置在能够接收从光源发射并由文件放置在文件放置单元上反射的光的位置处。 此外,通过从图像传感器的输出信号检测文档的边缘的位置来检测文档尺寸。 然后,控制光源驱动单元,使得当要读取图像时,激活光源以照亮文档。