Digital image forming apparatus
    52.
    发明授权
    Digital image forming apparatus 失效
    数字图像形成装置

    公开(公告)号:US6008911A

    公开(公告)日:1999-12-28

    申请号:US61225

    申请日:1993-05-17

    摘要: In a digital image forming apparatus wherein a user can change a gradation curve of the density of reproduced image plotted against the input image signal obtained by reading a document, it is needed to compensate a change of color of a reproduced image accompanied by the selection of a changed gradation curve. Then, when input multi-tone image signals of R, G and B are converted to multi-tone image signals of Y, M and C for printing, the masking coefficient used for the conversion from R, G and B to Y, M and C is changed according to the changed gradation curve. Then, the multi-tone image signals of Y, M and C are converted to light quantity data of a beam for exposing a photoconductor to form an image on the photoconductor according to the gradation curve.

    摘要翻译: 在其中用户可以改变再现图像的浓度的灰度曲线相对于通过读取文档获得的输入图像信号而绘制的数字图像形成装置中,需要补偿伴随着选择的再现图像的颜色的变化 一个改变的灰度曲线。 然后,当将R,G和B的输入多色调图像信号转换为用于打印的Y,M和C的多色调图像信号时,用于从R,G和B到Y,M和 C根据改变的灰度曲线而改变。 然后,将Y,M和C的多色调图像信号转换成用于曝光光电导体的光束的光量数据,以根据灰度曲线在感光体上形成图像。

    Digital image forming apparatus
    53.
    发明授权
    Digital image forming apparatus 失效
    数字图像形成装置

    公开(公告)号:US5729626A

    公开(公告)日:1998-03-17

    申请号:US365507

    申请日:1994-12-28

    IPC分类号: H04N1/40 G03F3/08 H04N1/04

    摘要: In a digital image forming apparatus, a document image is read as digital data, and an image type of bi-level image or multi-level image is discriminated from the digital data. For a bi-level image, an intensity of laser beam for exposing a photoconductor is modulated according to the image data with a duty ratio of 100%. On the other hand, for a multi-level image such as a photograph image, the intensity of laser beam is modulated with a duty ratio in the unit of two or more dots according to the image data. The duty ratio and the laser output power are changed according to a type of document image or according to sensitivity characteristic of the photoconductor.

    摘要翻译: 在数字图像形成装置中,文件图像被读取为数字数据,并且从数字数据中辨别出双级图像或多级图像的图像类型。 对于双电平图像,根据占空比为100%的图像数据调制用于曝光光电导体的激光束的强度。 另一方面,对于诸如照片图像的多级图像,根据图像数据,以两个或更多个点为单位的占空比来调制激光束的强度。 占空比和激光输出功率根据文件图像的类型或根据感光体的灵敏度特性而改变。

    Digital image forming apparatus having gradation characteristic setting
means
    54.
    发明授权
    Digital image forming apparatus having gradation characteristic setting means 失效
    具有灰度特性设定装置的数字图像形成装置

    公开(公告)号:US5585927A

    公开(公告)日:1996-12-17

    申请号:US61247

    申请日:1993-05-17

    CPC分类号: H04N1/295 H04N1/407

    摘要: In a digital image forming apparatus, a user can select a desired gradation curve representing the relation of the density of reproduced image to the input image signal obtained by reading a document among a plurality of gradation data stored in a memory in correspondence to image forming conditions of an electrophotographic process of forming an image. The image forming condition is determined separately. A gradation correction data is calculated from the gradation data to realize the object gradation curve. Then, an input image signal is converted to light quantity data for a beam for exposing a photoconductor by using the calculated gradation correction data to form a latent image on a photoconductor in the image forming conditions.

    摘要翻译: 在数字图像形成装置中,用户可以根据图像形成条件,选择表示再现图像的浓度与通过读取存储在存储器中的多个灰度数据之间读取文档而获得的输入图像信号的关系的期望灰度曲线 的电子照相方法形成图像。 图像形成条件分别确定。 根据灰度数据计算灰度校正数据,以实现对象灰度曲线。 然后,通过使用计算的灰度校正数据将输入图像信号转换为用于曝光光电导体的光束的光量数据,以在成像条件下在感光体上形成潜像。

    Electrophotographic image forming apparatus comprising means for
automatically adjusting image reproduction density
    55.
    发明授权
    Electrophotographic image forming apparatus comprising means for automatically adjusting image reproduction density 失效
    电子照相图像形成装置包括用于自动调节图像再现浓度的装置

    公开(公告)号:US5453773A

    公开(公告)日:1995-09-26

    申请号:US799609

    申请日:1991-11-27

    摘要: In an electrophotographic image forming apparatus including a charger for electrically charging the photoconductor to a predetermined initial electric potential, a laser projects a light onto the photoconductor so as to form an electrostatic latent image thereon, and a developing device develops the latent image with toner so as to form a toner image thereon. Further, a charger controller controls the charger based on a detection result of a detector for detecting a state of the photoconductor so that the initial electric potential of the photoconductor changes in a predetermined range, and a selection controller selects one of the plurality of gradation correction data stored in a storage unit based on the detection result of the detector when the initial electric potential of the photoconductor is an upper or lower limit value of the predetermined range. Moreover, a light projecting controller controls the laser to change a light amount of the light projected, based on the gradation correction data selected by the selection controller, according to an image density signal for representing densities of respective pixels of an image to be formed.

    摘要翻译: 在包括用于将感光体电荷充电至预定初始电位的充电器的电子照相图像形成装置中,激光器将光投射到光电导体上以在其上形成静电潜像,并且显影装置利用调色剂显影潜像 以便在其上形成调色剂图像。 此外,充电器控制器基于用于检测感光体的状态的检测器的检测结果来控制充电器,使得感光体的初始电位在预定范围内变化,并且选择控制器选择多个灰度校正中的一个 当感光体的初始电位为预定范围的上限或下限值时,基于检测器的检测结果存储在存储单元中的数据。 此外,光投影控制器根据用于表示要形成的图像的各像素的浓度的图像浓度信号,基于由选择控制器选择的灰度校正数据来控制激光改变投射光的光量。

    Digital image forming apparatus
    56.
    发明授权
    Digital image forming apparatus 失效
    数字图像形成装置

    公开(公告)号:US5420614A

    公开(公告)日:1995-05-30

    申请号:US971055

    申请日:1992-11-03

    摘要: In a digital image forming apparatus with use of electrophotographic process, an electrostatic latent image is formed by modulating the intensity of laser beam according to image data to expose a photoconductor in the raster scan to form an electrostatic latent image. A scan line is divided into groups of consecutive dots, and the exposure of the photoconductor with the beam is allowed only for a predetermined light-emitting time within the time needed to scan a predetermined period of consecutive dots in the scan line direction. Thus, the exposure is stopped periodically and the smoothness of a reproduced image is improved.

    摘要翻译: 在使用电子照相方法的数字图像形成装置中,通过根据图像数据调制激光束的强度来形成静电潜像,以在光栅扫描中曝光光电导体以形成静电潜像。 扫描线被分成连续的点组,并且只有在扫描线扫描线方向上的连续点的预定周期所需的时间内,才允许具有光束的感光体的曝光达预定的发光时间。 因此,周期性地停止曝光,并且改善了再现图像的平滑度。

    Apparatus and method for forming an image including correction for laser
beam size
    57.
    发明授权
    Apparatus and method for forming an image including correction for laser beam size 失效
    用于形成包括激光束尺寸校正的图像的装置和方法

    公开(公告)号:US5343235A

    公开(公告)日:1994-08-30

    申请号:US671963

    申请日:1991-03-19

    摘要: An apparatus and a method for forming an image with use of electrophotographic process, wherein the effect of the diffusion of electrostatic latent image and of beam size is compensated by changing the quantity of light for exposure, a gamma transformation table or a dither threshold value according to the detected value of the surface electric potential of a photoconductor or according to code information put on a support member of the photoconductor.

    摘要翻译: 一种使用电子照相方法形成图像的装置和方法,其中通过改变用于曝光的光量,伽马变换表或抖动阈值来补偿静电潜像和光束尺寸的扩散的影响,根据 到感光体的表面电位的检测值,或者根据放置在感光体的支撑构件上的代码信息。

    Image forming apparatus with a toner density control device
    59.
    发明授权
    Image forming apparatus with a toner density control device 失效
    具有调色剂浓度控制装置的图像形成装置

    公开(公告)号:US5124751A

    公开(公告)日:1992-06-23

    申请号:US698811

    申请日:1991-05-13

    IPC分类号: G03G15/08

    摘要: An image forming apparatus using a dual component developer. The apparatus comprises a first detection device for detecting a toner density of the developer; a second detection device for detecting an amount of a used toner; a determination device for determining an amount of the toner to be supplied in accordance with the toner density detected by the first detection means; and a revision device for revising the amount of the toner to be supplied determined by the determination means in accordance with the amount of used toner detected by the second detection means.

    摘要翻译: 一种使用双组分显影剂的图像形成装置。 该装置包括用于检测显影剂的调色剂浓度的第一检测装置; 用于检测用过的调色剂量的第二检测装置; 确定装置,用于根据由第一检测装置检测的调色剂浓度确定要供应的调色剂的量; 以及修正装置,用于根据由第二检测装置检测到的用过的调色剂的量来修正由确定装置确定的要供应的调色剂的量。

    Cleaner provided in a copying machine
    60.
    发明授权
    Cleaner provided in a copying machine 失效
    复印机中提供清洁剂

    公开(公告)号:US5119144A

    公开(公告)日:1992-06-02

    申请号:US387488

    申请日:1989-07-28

    IPC分类号: G03G15/16 G03G21/00 G03G21/10

    摘要: A cleaner in a transfer section of a copying machine for cleaning a soil toner transferred from a photoconductive member and adhering to the surface of a transfer drum, which includes a cleaning device which electrically attracts and cleans the soil toner on the surface of the transfer drum and an electrode disposed at the interior surface of the transfer drum for weakening the electrostatic force between the soil toner and the surface of the transfer drum. The electrode disposed in the interior of the dielectric drum is movable.

    摘要翻译: 一种复印机的转印部分中的清洁剂,用于清洁从感光体转移并且粘附到转印鼓表面上的污垢调色剂,该清洁装置包括电吸引并清洁转印鼓表面上的污垢调色剂的清洁装置 以及设置在转印鼓的内表面处的电极,用于削弱土壤调色剂和转印鼓表面之间的静电力。 设置在介质鼓内部的电极是可移动的。