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    • 1. 发明授权
    • Exposure unit for a multicolor image forming apparatus capable of better
registration of the multicolor images
    • 用于能够更好地配准多色图像的多色成像装置的曝光单元
    • US5291223A
    • 1994-03-01
    • US942726
    • 1992-09-09
    • Atsushi OganeYozo FujiiTadashi MiwaIsao MatsuokaHideo Satoh
    • Atsushi OganeYozo FujiiTadashi MiwaIsao MatsuokaHideo Satoh
    • G03G15/01H04N1/50G03G15/04
    • H04N1/506G03G15/011
    • An exposure device includes a polygon mirror to scan a photoreceptors with a plurality of laser beams to write plural color component latent images. The polygon mirror receives two laser beams at its two mirrors which are arranged diagonal to each other and reflects the two laser beams in the opposite directions to each other so that a first laser beam scans from the first side to the second side of the photoreceptor. On the photoreceptor are provided sensors to output first and second position signals independently when the first and second laser beams pass respectively the reference position mark disposed at one side on the photoreceptor. The exposure device is controlled in accordance with the position signals so that the start timing of the first laser beam is determined on the basis of the first position signal which is obtained in the current scanning line of the first laser beam and that the start timing of the second laser beam is determined on the basis of the second position signal which has been obtained in the previous scanning line of the second laser beam.
    • 曝光装置包括多面镜,用于扫描具有多个激光束的感光体以写入多个颜色分量潜像。 多面镜在其两个反射镜的两个反射镜处接收两个激光束,这两个反射镜彼此对角布置,并且将两个激光束彼此相反的方向反射,使得第一激光束从感光体的第一侧扫描到第二侧。 在感光体上设有传感器,当第一和第二激光束分别通过设置在感光体一侧的基准位置标记时,独立地输出第一和第二位置信号。 根据位置信号控制曝光装置,使得基于在第一激光束的当前扫描线中获得的第一位置信号确定第一激光束的开始定时,并且确定第一激光束的开始定时 基于在第二激光束的先前扫描线中获得的第二位置信号来确定第二激光束。
    • 2. 发明授权
    • Color image forming apparatus
    • 彩色图像形成装置
    • US5381167A
    • 1995-01-10
    • US962862
    • 1992-10-19
    • Yozo FujiiTadashi MiwaHisao SatohAtsushi OganeIsao MatsuokaTadayoshi Ikeda
    • Yozo FujiiTadashi MiwaHisao SatohAtsushi OganeIsao MatsuokaTadayoshi Ikeda
    • G03G15/01H04N1/047H04N1/113H04N1/12H04N1/50G01D15/14
    • G03G15/0152G03G15/0163H04N1/0473H04N1/506H04N1/1135H04N1/12H04N2201/0471H04N2201/04748H04N2201/04756H04N2201/04786
    • A color image forming machine includes a plurality of exposure units for irradiating an image carrier movable in a secondary scanning direction of the exposure units by primary scanning beams, at a plurality of irradiation positions to form latent images, a plurality of charging units for charging the image carrier corresponding to the irradiation positions of the exposure units and a plurality of developing units to form toner images corresponding the latent images. The plurality of toner images are superimposed on the image carrier to obtain a multi-color or full-color images trough transferring and fixing. A light-reflective registration mark is provided to a non-image area on one side of the image carrier. Employing at least two exposure units, irradiation by each primary scanning beam is conducted to the light-reflective registration mark moving in the secondary scanning direction. Each reflected beam from the registration mark is received by a plurality of photoreceptor sensors and then detection signals of a registration mark position are generated. Timing of writing by the primary scanning beam and a distance between bright lines formed on the image carrier by primary scanning beams of at least two exposure units are detected. The detected result is fed back to control the start timing of image writing and the driving of the image carrier.
    • 一种彩色图像形成机包括多个曝光单元,用于在多个照射位置处照射通过主扫描光束在曝光单元的副扫描方向上可移动的图像载体,以形成潜像;多个充电单元, 对应于曝光单元的照射位置的图像载体和多个显影单元,以形成对应于潜像的调色剂图像。 多个调色剂图像叠加在图像载体上,以通过传送和固定获得多色或全色图像。 光反射对准标记被提供给图像载体的一侧上的非图像区域。 使用至少两个曝光单元,每个主扫描光束的照射被传导到在二次扫描方向上移动的光反射对准标记。 来自对准标记的每个反射光束被多个感光体传感器接收,然后产生对准标记位置的检测信号。 检测由初级扫描光束写入的时序以及通过至少两个曝光单元的主扫描光束形成在图像载体上的亮线之间的距离。 反馈检测结果来控制图像写入的开始定时和图像载体的驱动。