-
1.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
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。
-
公开(公告)号：US6008911A
公开(公告)日：1999-12-28
申请号：US61225
申请日：1993-05-17
CPC分类号： H04N1/6091 , H04N1/6011 , H04N1/6027
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。
-
公开(公告)号：US5663814A
公开(公告)日：1997-09-02
申请号：US365798
申请日：1994-12-29
申请人： Yoshinobu Hada , Kazuyuki Fukui , Takanobu Yamada
发明人： Yoshinobu Hada , Kazuyuki Fukui , Takanobu Yamada
CPC分类号： H04N1/40043 , H04N1/40037 , H04N1/407
摘要： In an electrophotographic process, a laser beam exposes a photoconductor according to image density level to form a latent image. In the exposure, a duty ratio of light emission period to a length of a dot is changed according to the density level. In a first mode, the duty ratio is decreased with the density level if the density level is lower than a predetermined density level, while in a second mode, the duty ratio is increased if the density level is higher than a predetermined density level. Thus, the nonlinearity of gradation characteristic is improved. A user can select a desired mode among three modes on the duty ratio to reproduce an image of desired image quality. Thus, the nonlinearity of gradation characteristic is improved, and an image can be reproduced stably.
摘要翻译： 在电子照相方法中，激光束根据图像浓度水平曝光光电导体以形成潜像。 在曝光中，发光周期与点长度的占空比根据浓度水平而变化。 在第一模式中，如果密度水平低于预定浓度水平，则占空比随浓度水平降低，而在第二模式中，如果浓度水平高于预定浓度水平，则占空比增加。 因此，提高了灰度特性的非线性。 用户可以在占空比的三种模式中选择期望的模式，以再现期望的图像质量的图像。 因此，提高了灰度特性的非线性，并且可以稳定地再现图像。
-
公开(公告)号：US6006010A
公开(公告)日：1999-12-21
申请号：US977219
申请日：1997-11-24
申请人： Yoshinobu Hada , Kazuyuki Fukui , Takanobu Yamada
发明人： Yoshinobu Hada , Kazuyuki Fukui , Takanobu Yamada
CPC分类号： H04N1/40043 , H04N1/40037 , H04N1/4005 , H04N1/40062
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 or 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类型或文档图像或根据感光体的灵敏度特性而改变。
-
公开(公告)号：US5729626A
公开(公告)日：1998-03-17
申请号：US365507
申请日：1994-12-28
申请人： Yoshinobu Hada , Kazuyuki Fukui , Takanobu Yamada
发明人： Yoshinobu Hada , Kazuyuki Fukui , Takanobu Yamada
CPC分类号： H04N1/40043 , H04N1/40037 , H04N1/4005 , H04N1/40062
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。
-
公开(公告)号：US5420614A
公开(公告)日：1995-05-30
申请号：US971055
申请日：1992-11-03
申请人： Kazuyuki Fukui , Yoshinobu Hada , Takanobu Yamada
发明人： Kazuyuki Fukui , Yoshinobu Hada , Takanobu Yamada
IPC分类号： B41J2/44 , B41J2/45 , B41J2/455 , G03G15/04 , H04N1/23 , H04N1/29 , H04N1/40 , H04N1/405 , H04N1/409 , G01D9/42
CPC分类号： H04N1/29 , H04N1/40025 , H04N1/4056
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。
-
7.发明授权Image forming apparatus for synthesizing a differential peak signal and an image signal 失效用于合成差分峰值信号和图像信号的图像形成装置
公开(公告)号：US5633669A
公开(公告)日：1997-05-27
申请号：US187346
申请日：1994-01-26
申请人： Yoshinobu Hada , Masaki Tanaka , Kazuyuki Fukui , Kouichi Etou
发明人： Yoshinobu Hada , Masaki Tanaka , Kazuyuki Fukui , Kouichi Etou
CPC分类号： H04N1/40037
摘要： In a digital image forming apparatus, the intensity or the pulse width of laser beam exposure is modulated according to image signals of a document detected by a sensor. A peak waveform having a peak is generated in each light-emitting period of laser beam. For example, and a signal having a peak is synthesized with the image signals to generate the peak waveform. Thus, the laser is driven according to the peak waveforms so that the exposed portions on a photoconductor in correspondence to the peaks are exposed with a larger quantity of light at low densities. Then, the amount of the gamma correction can be decreased and the gradation characteristic can be stabilized.
摘要翻译： 在数字图像形成装置中，根据由传感器检测到的文件的图像信号来调制激光束曝光的强度或脉冲宽度。 在激光束的每个发光周期中产生具有峰值的峰值波形。 例如，具有峰值的信号与图像信号合成以产生峰值波形。 因此，激光器根据峰值波形被驱动，使得对应于峰值的光电导体上的暴露部分以较低密度的更大量的光被暴露。 然后，可以减少伽马校正的量并且可以稳定灰度特性。
-
8.发明授权Toner density measurement apparatus having output characteristics variable with humidity 失效具有湿度变化的输出特性的调色剂浓度测量装置
公开(公告)号：US5146274A
公开(公告)日：1992-09-08
申请号：US542574
申请日：1990-06-22
CPC分类号： G03G15/0849 , G03G15/0853 , G03G15/0855
摘要： A photoelectronic image forming apparatus reproduces an image on the basis of an electrostatic latent image produced on a photo-sensitive body by using a developer containing a toner and a carrier, and comprises a plurality of toner density measuring units for respectively producing outputs each indicative of a toner density of the developer and a toner density determining unit responsive to the outputs for determining an actual toner density so as to precisely control the tone of the image.
摘要翻译： 光电图像形成装置通过使用含有调色剂和载体的显影剂，基于在感光体上产生的静电潜像再现图像，并且包括多个调色剂浓度测量单元，用于分别产生指示 显影剂的调色剂浓度和调色剂浓度确定单元，其响应于用于确定实际调色剂浓度的输出，以精确地控制图像的色调。
-
公开(公告)号：US5119144A
公开(公告)日：1992-06-02
申请号：US387488
申请日：1989-07-28
CPC分类号： G03G15/166 , G03G21/0005 , G03G2215/1657
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。
-
公开(公告)号：US5005517A
公开(公告)日：1991-04-09
申请号：US376411
申请日：1989-07-06
CPC分类号： G03G15/0822 , G03G15/0126 , G03G15/0849 , G03G15/0853 , G03G15/0893 , G03G2215/0822
摘要： The transporting speed of a developer transporting roller is switched over depending on the condition whether a developing unit is operated for developing process or the developing unit is not in action for developing operation, and a comparable standard value for making a decision whether toner replenishment is required or not is changed based on the toner density value detected by a magnetic sensor when the developing unit is operated or is not in action for developing operation. When the developing unit has finished a predetermined number of operations, and image forming operation is suspended, a developer stirring and transporting roller is driven for a duration of time corresponding to the number of developing operations conducted, and toner density detection and toner replenishment is carried out corresponding to the toner density detected.
摘要翻译： 显影剂输送辊的输送速度根据显影单元是否用于显影处理或显影单元不起作用以进行显影操作的条件切换，以及用于决定是否需要调色剂补充的可比标准值 或者不是基于当显影单元操作时由磁性传感器检测到的调色剂浓度值或不用于显影操作而改变。 当显影单元已经完成预定数量的操作并且成像操作被暂停时，显影剂搅拌和输送辊被驱动持续时间，与所进行的显影操作数相对应，并且进行调色剂浓度检测和调色剂补充 对应于检测到的调色剂浓度。
-
-
-
-
-
-
-
-
-
搜索结果
66 条记录 (耗时 0.027 秒)
