公开(公告)号：US4883019A

公开(公告)日：1989-11-28

申请号：US145815

申请日：1988-01-19

申请人： Takeshi Menjo ,  Masahiro Inoue ,  Koji Amemiya

发明人： Takeshi Menjo ,  Masahiro Inoue ,  Koji Amemiya

IPC分类号： G03G15/08

CPC分类号： G03G15/0855 ,  G03G15/0877

摘要： An image forming apparatus including an image bearing member, a developing device for developing a latent image formed on the image bearing member and including a developer carrying member for carrying the developer toward the image bearing member, a toner content detecting device including a reflecting member for receiving light and reflecting a quantity of light corresponding to a reference toner content, a light emitting element and a light receiving element for producing an electric signal in accordance with a quantity of light applied to and received from the reflecting member, and a toner content control device for controlling toner supply to the developing device in accordance with a signal produced by the toner content detecting device. The toner content control device includes a device for storing a ratio of a reference toner content signal to a reference reflection density signal. A toner supply control device is provided for producing a ratio signal representative of a ratio of a toner content signal from the light receiving element to a reflection density signal from the light receiving element, for comparing the ratio signals, and for controlling toner supply to the developing device on the basis of a result of the comparison.

摘要翻译： 一种图像形成装置，包括图像承载部件，用于显影形成在图像承载部件上的潜像的显影装置，并且包括用于将显影剂携带到图像承载部件的显影剂承载部件;调色剂含量检测装置，包括反射部件， 接收光并反射与参考调色剂含量相对应的光量，发光元件和用于根据施加到反射构件并从反射构件接收的光量产生电信号的光接收元件，以及调色剂含量控制 用于根据由调色剂含量检测装置产生的信号控制向显影装置供应调色剂的装置。 调色剂含量控制装置包括用于存储基准调色剂含量信号与参考反射浓度信号的比率的装置。 提供调色剂供应控制装置，用于产生表示来自光接收元件的调色剂含量信号与来自光接收元件的反射浓度信号的比率的比率信号，用于比较信号比率，以及用于控制调色剂供应到 基于比较结果的显影装置。