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    • 19. 发明授权
    • Image reading apparatus and image reading module
    • 图像读取装置和图像读取模块
    • US07518763B2
    • 2009-04-14
    • US10937332
    • 2004-09-10
    • Ryuuichi ShiraishiShunsuke HamasunaYuichi Mikuni
    • Ryuuichi ShiraishiShunsuke HamasunaYuichi Mikuni
    • H04N1/04
    • H04N1/02895H04N1/02815H04N1/1215H04N1/193H04N1/203H04N1/2032
    • A scanner is provided with an illumination lamp for emitting light to a first side of a document from one side of a transfer path and a CCD image sensor for receiving light reflected from the first side of the document, and a CIS provided in a document feeder is provided with an LED for emitting light to a second side of the document from the other side of the transfer path and a line sensor for receiving light reflected from the second side of the document. The illumination lamp is a xenon lamp, and the LED is a white LED having emission characteristics different from those of the xenon lamp. To the CIS, a filter is attached, which brings emission characteristics of light emitted from the LED onto a document closer to those of light emitted from the illumination lamp onto the document.
    • 扫描器设置有用于从传送路径的一侧向文档的第一侧发射光的照明灯和用于接收从文档的第一侧反射的光的CCD图像传感器,以及设置在文档馈送器中的CIS 设置有用于从传送路径的另一侧向文档的第二侧发射光的LED和用于接收从文档的第二面反射的光的线传感器。 照明灯是氙灯,LED是具有与氙灯不同的发光特性的白色LED。 向CIS连接有滤光片,其将从LED发射的光的发射特性带到更靠近从照明灯发射到文件上的光的文档。