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    • 5. 发明授权
    • Image forming apparatus and examination image forming method in image
forming apparatus
    • 图像形成装置和检查图像形成方法
    • US5995777A
    • 1999-11-30
    • US205230
    • 1998-12-04
    • Katsuya NagamochiRintaro Nakane
    • Katsuya NagamochiRintaro Nakane
    • G03G15/00G03G21/06
    • G03G15/5041G03G15/5037G03G2215/00042
    • An image forming apparatus of the present invention includes an exposure portion to form an electrostatic latent image by exposing the surface of an image carrier, a developing device to form a developer image by developing the electrostatic latent image formed on the image carrier with a developer and a detecting device that has a specified detecting area on the image carrier and detects the quality change of an image formed on the detecting area. The image forming apparatus of the present invention further includes a means to decide a minimum examination image forming area that is nearly in accord with the detecting area of the detecting device by forming an examination image for the image change detection on the image carrier by the exposure portion and the developing device, detecting the formed examination image by the detecting means and changing the examination image forming area according to the detection result of the detecting device.
    • 本发明的图像形成装置包括通过曝光图像载体的表面形成静电潜像的曝光部分,显影装置,以通过用显影剂显影形成在图像载体上的静电潜像来形成显影剂图像, 检测装置,其在图像载体上具有指定的检测区域,并检测形成在检测区域上的图像的质量变化。 本发明的图像形成装置还包括一种装置,用于通过形成用于通过曝光的图像载体上的图像变化检测的检查图像来决定与检测装置的检测区域几乎一致的最小检查图像形成区域 部分和显影装置,通过检测装置检测形成的检查图像,并根据检测装置的检测结果改变检查图像形成区域。
    • 9. 发明授权
    • Image forming apparatus for controlling image density using logarithm
compressing means
    • 用于使用对数压缩装置控制图像浓度的图像形成装置
    • US5365313A
    • 1994-11-15
    • US32299
    • 1993-03-17
    • Katsuya NagamochiRintaro Nakane
    • Katsuya NagamochiRintaro Nakane
    • G01N21/88G01J1/44G01N21/84G01N21/86G01N21/952G03G15/00G03G15/08
    • G03G15/5041G01J1/44G01J2001/444G01N2021/4769G01N2021/8433G01N21/86G01N2201/1232G03G2215/00042
    • A toner depositing amount measuring apparatus for measuring the amount of toner deposited on a photosensitive drum includes a light source for irradiating the surface of the photosensitive drum with light and a photoelectric converting section for receiving the reflected light and converting the received reflected light into an electric signal. A logarithmic calculation is applied to the output signal of the photoelectric converting section in a logarithm-compressing section. The temperature characteristics of the logarithm-compressing section are compensated for in a temperature compensating section. The amount of the toner deposition is calculated in a toner depositing amount calculating section based on a difference between the data during non-deposition of the toner and the data during deposition of the toner, the data being obtained from the logarithm-compressing section. Further, image forming conditions are changed in a control section in accordance with an output signal denoting the calculated deposition amount of the toner so as to control the density of the image formed.
    • 用于测量沉积在感光鼓上的调色剂量的调色剂沉积量测量装置包括用于用光照射感光鼓的表面的光源和用于接收反射光的光电转换部分,并将接收的反射光转换成电 信号。 在对数压缩部中对光电转换部的输出信号进行对数运算。 在温度补偿部中补偿对数压缩部的温度特性。 调色剂沉积的量基于调色剂非沉积期间的数据与沉积调色剂期间的数据之间的差异在调色剂沉积量计算部分中计算,该数据从对数压缩部分获得。 此外,根据表示计算出的调色剂沉积量的输出信号,在控制部分中改变图像形成条件,以便控制形成的图像的浓度。