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1. 发明专利

JP2014120893A Image reader, control method of the same, and image forming apparatus 审中-公开
标题翻译：图像读取器，其控制方法和图像形成装置
公开(公告)号：JP2014120893A
公开(公告)日：2014-06-30
申请号：JP2012274008
申请日：2012-12-14
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： INOUE KEITA , SHIRATO HIROTAKA , INAGE OSAMU
IPC分类号： H04N1/19 , G06T1/00
摘要： PROBLEM TO BE SOLVED: To perform image reading processing using a right/left division reading system at faster speed and with high quality.SOLUTION: An image sensor includes a plurality of photoelectric conversion elements which are continuously arranged and output received light as a pixel signal. A first region from one end of arrangement to a prescribed position in the arrangement and a second region from the prescribed position to the other end of the arrangement are divided and the pixel signals are outputted from the plurality of photoelectric conversion elements. When the image sensor receives reflected light from a background plate, an average value of pixel values is calculated from the plurality of pixel signals outputted from at least one of the first region and the second region. Correction is performed on shading correction in accordance with a comparison result obtained by comparing the average value with a reference value. The correction for one shading correction is performed for every one or more document images when the document images are continuously read.
摘要翻译：要解决的问题：以更快的速度和高质量执行使用右/左分割读取系统的图像读取处理。解决方案：图像传感器包括连续布置的多个光电转换元件，并将接收的光作为像素信号输出。从布置的一端到布置中的规定位置的第一区域和从布置的规定位置到另一端的第二区域被划分，并且从多个光电转换元件输出像素信号。当图像传感器接收到来自背景板的反射光时，根据从第一区域和第二区域中的至少一个输出的多个像素信号来计算像素值的平均值。根据通过将平均值与参考值进行比较而获得的比较结果，对阴影校正进行校正。当文档图像被连续读取时，对于每一个或多个文档图像执行一个阴影校正的校正。

2. 发明专利

JP2014060554A Image reading device, image forming apparatus, and afterimage characteristic value detection method 审中-公开
标题翻译：图像读取装置，图像形成装置和后置特征值检测方法
公开(公告)号：JP2014060554A
公开(公告)日：2014-04-03
申请号：JP2012203682
申请日：2012-09-14
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： INOUE KEITA
IPC分类号： H04N1/028 , G06T1/00 , H01L27/148 , H04N1/19 , H04N1/409 , H04N5/372
摘要： PROBLEM TO BE SOLVED: To provide an image reading device capable of performing an afterimage characteristic evaluation without the need to separately prepare an evaluation device and jig, an image forming apparatus, and an afterimage characteristic value detection method.SOLUTION: An image reading device receives, with a CCD image sensor, reflection light of an LED light source irradiating a document to read an image from the document, and includes: a light source control unit that controls turning on and off of the LED light source in synchronization with a shift signal for shifting electrical charge temporarily stored in a light receiving unit of the CCD image sensor; and an afterimage calculation processing unit that calculates an afterimage characteristic value of the CCD image sensor on the basis of the reflection light of the LED light source turned on and off by the light source control unit.
摘要翻译：要解决的问题：提供一种能够进行余像特性评估的图像读取装置，而不需要分别准备评估装置和夹具，图像形成装置和余像特征值检测方法。解决方案：图像读取装置接收利用CCD图像传感器，照射文件的LED光源的反射光从文档读取图像，并且包括：光源控制单元，其与移位信号同步地控制LED光源的接通和关断用于移动临时存储在CCD图像传感器的光接收单元中的电荷; 以及余像计算处理单元，其基于由所述光源控制单元接通和关断所述LED光源的反射光来计算所述CCD图像传感器的残像特性值。

3. 发明专利

JP2014138356A Photoelectric conversion device and image reader and image formation apparatus 有权
标题翻译：光电转换装置和图像读取器和图像形成装置
公开(公告)号：JP2014138356A
公开(公告)日：2014-07-28
申请号：JP2013007065
申请日：2013-01-18
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： INOUE KEITA
IPC分类号： H04N5/361 , H04N5/369 , H04N5/374 , H04N5/376
摘要： PROBLEM TO BE SOLVED: To achieve high accuracy black shading correction, by not shielding the incident light to a light-receiving element but generating an appropriate black level at each pixel unit while a light source is turned on.SOLUTION: A photoelectric conversion device includes a light-receiving element 8 which generates charges corresponding to the intensity of incident light and accumulating the charges, and a charge detector 10 for converting the charges thus accumulated into a voltage. The photoelectric conversion device can switch a normal output mode for resetting a capacitor 14 by turning the RS gate 13 of the charge detector 10 on/off, and then transferring the charges accumulated in the light-receiving element 8 to the capacitor 14 by turning a PT gate 15 on/off, before outputting a signal converted into a voltage, and a dummy black level output mode for resetting the capacitor 14 of the charge detector 10, and then resetting the capacitor 14 again by turning the RS gate 13 on/off while turning the PT gate off, before outputting a signal of black level unrelated to the incident light.
摘要翻译：要解决的问题：为了实现高精度的黑色阴影校正，通过不将入射光屏蔽到光接收元件，而在光源接通时在每个像素单元处产生适当的黑色电平。解决方案：光电转换装置包括产生对应于入射光强度并累积电荷的电荷的光接收元件8，以及用于将如此累积的电荷转换为电压的电荷检测器10。光电转换装置可以通过使充电检测器10的RS栅极13接通/断开来切换用于复位电容器14的正常输出模式，然后通过转动电容器14将累积在光接收元件8中的电荷转移到电容器14 PT门15在输出转换为电压的信号之前开/关，以及虚拟黑电平输出模式，用于复位电荷检测器10的电容器14，然后通过打开/关闭RS门13来再次复位电容器14 同时关闭PT门，然后输出与入射光无关的黑色电平信号。

4. 发明专利

JP2015091036A 画像読取装置、画像読取方法および画像形成装置审中-公开
公开(公告)号：JP2015091036A
公开(公告)日：2015-05-11
申请号：JP2013230401
申请日：2013-11-06
申请人： RICOH CO LTD
发明人： INOUE KEITA
IPC分类号： H04N1/19 , G06T1/00 , H04N1/028 , H04N1/401
摘要：【課題】間欠シェーディングを実行する時のレベル補正する際の背景板の読み取り時間を短縮することができる画像読取装置、画像読取方法および画像形成装置を提供する。【解決手段】本発明に係る画像読取装置は、複数の原稿を連続的に読み込む場合に、先の原稿を読み込んでから次の原稿を読み込むまでの第1期間で、主走査方向に並ぶ所定数の受光素子の一部の受光素子が基準部材からの反射光を画素毎に光電変換した信号を出力する画素信号出力部と、前記基準部材からの反射光を画素毎に光電変換した一部の受光素子が出力した前記信号を前記所定数の受光素子の信号とするように補間する補間部と、前記補間部が補間した前記所定数の信号に基づいてシェーディング補正を行うシェーディング補正部と、を備える。【選択図】図2

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