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    • 1. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20130156449A1
    • 2013-06-20
    • US13707797
    • 2012-12-07
    • Kohta FUJIMORIKayoko TanakaKeita Sone
    • Kohta FUJIMORIKayoko TanakaKeita Sone
    • G03G15/00
    • G03G15/55G01N21/55G03G15/0189G03G15/5058
    • An image forming apparatus includes a image forming unit; an image bearing member having a surface to bear a toner image and a test pattern; the surface having a first time-surface positioned identical to the test pattern, an integer multiple of revolutions upstream or downstream from the test pattern in a surface movement direction, and a second time-surface positioned different from the test pattern, shorter than one revolution upstream or downstream from the test pattern; a reflection light detector to detect the amount of light reflected from the test pattern and the first and second time-surfaces of the image bearing member; and a controller to control the image forming unit based on the detection result and determine whether to execute a first-surface control to detect at least the first time-surface or a second-surface control to detect only the second time-surface based on use condition of the image forming apparatus.
    • 图像形成装置包括图像形成单元; 具有承载调色剂图像的表面和测试图案的图像承载部件; 所述表面具有与测试图案相同的第一时间表面,在测试图案的表面移动方向上游或下游的转数的整数倍,以及与测试图案不同的第二时间表,短于一转 测试图案的上游或下游; 反射光检测器,用于检测从测试图案反射的光量和图像承载部件的第一和第二时间表面; 以及控制器,其基于检测结果来控制图像形成单元,并且确定是否执行第一表面控制以至少检测第一时间表面或第二表面控制,以仅基于使用检测第二时间表面 图像形成装置的状态。
    • 3. 发明授权
    • Image forming apparatus and image density control method
    • 图像形成装置和图像浓度控制方法
    • US08045874B2
    • 2011-10-25
    • US12367736
    • 2009-02-09
    • Akira YoshidaShin HasegawaHitoshi IshibashiYoshiaki MiyashitaKohta FujimoriNobutaka TakeuchiKayoko TanakaYushi HirayamaTetsuya Muto
    • Akira YoshidaShin HasegawaHitoshi IshibashiYoshiaki MiyashitaKohta FujimoriNobutaka TakeuchiKayoko TanakaYushi HirayamaTetsuya Muto
    • G03G15/00G03G15/06
    • G03G15/0131G03G15/5058G03G2215/00037G03G2215/00042G03G2215/00059G03G2215/00063
    • An image forming apparatus includes a control device that calculates a developing ability of the developing device based on a detection value detected by an optical detection device from the plural toner patches. The control device adjusts an image formation condition based on the calculated developing ability. A factor detection device is provided to detect a contributing factor that causes the developing ability to largely change after the last adjustment of the image formation condition. The control device controls image formation such that when the factor detection device does not detect the contribution factor and a developing ability calculated this time is different from that calculated last time (as to a part of the plural toner patches), the plural toner patches are formed based on a prescribed fixed image formation condition so that an attraction amount of toner attracting to the plural toner patches enter a prescribed range detectable for the optical detection device. The remaining toner patches are formed (based on an image formation condition determined) in accordance with the image formation condition previously adjusted. When the detection device detects the contribution factor, the entire toner patches are formed based on the prescribed fixed condition.
    • 图像形成装置包括控制装置,其基于来自多个调色剂贴片的由光学检测装置检测的检测值来计算显影装置的显影能力。 控制装置基于计算出的显影能力来调整图像形成条件。 提供了一种因素检测装置,用于检测在最后一次调整图像形成条件之后导致显影能力发生很大变化的因素。 控制装置控制图像形成,使得当因子检测装置未检测到贡献因子,并且此次计算的显影能力与上次计算的不同(关于多个调色剂片的一部分)时,多个调色剂片是 基于规定的固定图像形成条件形成,使得吸引到多个调色剂贴片的调色剂的吸引量进入可检测的用于光学检测装置的规定范围。 根据先前调整的图像形成条件形成剩余调色剂片(基于确定的图像形成条件)。 当检测装置检测到贡献因子时,根据规定的固定条件形成整个调色剂贴片。