公开(公告)号：US10430699B2

公开(公告)日：2019-10-01

申请号：US15896542

申请日：2018-02-14

申请人： Hiroyuki Igawa ,  Hideki Kamaji

发明人： Hiroyuki Igawa ,  Hideki Kamaji

IPC分类号： G06K15/02 ,  G06K15/10 ,  H04N1/405 ,  H04N1/191 ,  H04N1/52

摘要： An image processing apparatus includes a storage and processing circuitry. The storage is configured to store a dither table in which a plurality of dither patterns are recorded, each of the dither patterns being formed with a halftone dot screen in which an output area ratio that is a proportion of void halftone dots per unit area corresponds to any one of gradation values of image data. The processing circuitry is configured to read a gradation value for each region in image data input for each toner color, decide a dither pattern to be applied to the read gradation value, read out the decided dither pattern from the dither table, and perform dither processing of applying the read dither pattern to the region in the image data.

公开(公告)号：US09706080B2

公开(公告)日：2017-07-11

申请号：US14955990

申请日：2015-12-01

申请人： Hiroyuki Igawa ,  Hideki Kamaji

发明人： Hiroyuki Igawa ,  Hideki Kamaji

IPC分类号： G06K15/02 ,  G06K15/14 ,  H04N1/405 ,  H04N1/40

CPC分类号： H04N1/4051 ,  G06K15/1881

摘要： An image processing apparatus stores a first dither pattern group that includes dither patterns each corresponding to a gradation value in a first range and formed by line screens in which widths of lines are increased with an increase in the gradation value, a second dither pattern group that includes dither patterns each corresponding to a gradation value in a second range higher than the gradation value in the first range, and formed by void dot screens in which number of dots is increased and void regions surrounded by the dots are decreased with an increase in the gradation value, and a third dither pattern group that includes dither patterns for switching from the line screen to the void dot screen, switching to the void dot screen being completed before a first reference gradation value at which an image defect occurs for received image data is reached.

公开(公告)号：US06434356B1

公开(公告)日：2002-08-13

申请号：US09658155

申请日：2000-09-08

申请人： Hiroyasu Ishijima ,  Kunihiko Sato ,  Hideki Kamaji ,  Hisashi Hanzawa

发明人： Hiroyasu Ishijima ,  Kunihiko Sato ,  Hideki Kamaji ,  Hisashi Hanzawa

IPC分类号： G03G1516

CPC分类号： G03G15/1675

摘要： An image transferring apparatus is provided which holds a print sheet in a nip between an image carrier and a transfer roller and supplies the current to the transfer roller to transfer a toner image formed on the image carrier to the print medium. The apparatus has conductive brushes disposed in contact with ends. of the transfer roller to form a bypass circuit. The bypass circuit is connected to ground through a resistor and introduce the part of the current supplied to the transfer roller in an image transferring operation, thereby avoiding formation of any print defects such as discharge-caused marks or toner stops.

摘要翻译： 提供一种图像传送装置，其将打印片材保持在图像载体和转印辊之间的辊隙中，并将电流供给到转印辊，以将形成在图像载体上的调色剂图像转印到打印介质上。 该设备具有与末端接触设置的导电刷。 的转印辊以形成旁路电路。 旁路电路通过电阻器连接到地，并在图像转印操作中引入提供给转印辊的电流的一部分，从而避免形成诸如放电引起的标记或调色剂停止的任何打印缺陷。

公开(公告)号：US5867758A

公开(公告)日：1999-02-02

申请号：US701893

申请日：1996-08-23

申请人： Sadaaki Yoshida ,  Hideki Kamaji ,  Tsuneo Mizuno

发明人： Sadaaki Yoshida ,  Hideki Kamaji ,  Tsuneo Mizuno

IPC分类号： B21D28/02 ,  G03G15/08 ,  G03G15/06 ,  G03G21/00

CPC分类号： G03G15/0812 ,  G03G2215/0866

摘要： A blade controls a layer thickness of the developer and/or triboelectrically charges the developer on a surface of the developing roller in an electrographic imaging device. The blade is a longitudinally extended member made by punching a thin resilient plate of metal in a press mold, and a tip portion thereof has a curved tail part having a smooth surface and a gradually reduced thickness formed as a shear drop upon punching.

摘要翻译： 叶片控制显影剂的层厚度和/或在电子照相成像装置中对显影辊的表面上的显影剂进行摩擦电荷充电。 刀片是通过在压制模具中冲压金属薄弹性板制成的纵向延伸部件，并且其尖端部分具有弯曲的尾部部分，其具有平滑表面，并且在冲压时形成为剪切液滴的逐渐减小的厚度。

公开(公告)号：US5489974A

公开(公告)日：1996-02-06

申请号：US445732

申请日：1995-05-22

申请人： Hideki Kamaji ,  Kazumi Kawabata ,  Kazunori Hirose ,  Sadaaki Yoshida ,  Takeshi Tanimoto

发明人： Hideki Kamaji ,  Kazumi Kawabata ,  Kazunori Hirose ,  Sadaaki Yoshida ,  Takeshi Tanimoto

IPC分类号： G03G13/08 ,  G03G15/08 ,  G03G15/16 ,  G03G15/06

CPC分类号： G03G13/08 ,  G03G15/0806 ,  G03G15/0812 ,  G03G15/0818 ,  G03G15/1685 ,  G03G2215/0866

摘要： An electrostatic latent image formed on a photosensitive drum is electrostatically developed with a non-magnetic type developer, and is electrostatically transferred from the drum to a paper. The developer is composed of a toner component and a resin powder component, one component of which has a polarity opposite to that of an electric charge of the other component generated by triboelectrification therebetween. In the developing process, a conductive foam rubber developing roller is used, which includes a conductive tubular foam rubber roller element, and a metal shaft inserted into a central bore thereof. The roller element has an outer thicker portion including a conductive filler dispersed therein, and an inner solid skin layer defining the central bore thereof and exhibiting an electrical resistivity considerably higher than that of the thicker portion for lack of conductive filler. Nevertheless, a sufficient electrical contact is established between the roller element and the shaft. A thin metal blade is pressed against the roller for regulating the thickness of the developer entrained thereby, and is arranged to compensate for a resilient deformation of the shaft caused when pressing the blade against the roller.

摘要翻译： 形成在感光鼓上的静电潜像用非磁性显影剂静电显影，并从鼓静电转印到纸上。 显影剂由调色剂组分和树脂粉末组分组成，其一种组分具有与通过其摩擦带电产生的另一组分的电荷的极性相反的极性。 在显影过程中，使用导电泡沫橡胶显影辊，其包括导电管状泡沫橡胶辊元件和插入其中心孔中的金属轴。 辊元件具有包括分散在其中的导电填料的外部较厚部分和限定其中心孔的内部固体表层，并且对于缺少导电填料而言，其电阻率显着高于较厚部分的电阻率。 然而，在滚子元件和轴之间建立了足够的电接触。 薄的金属刀片被压在辊子上，用于调节由此夹带的显影剂的厚度，并且被布置成补偿当将刀片压靠在辊子上时引起的轴的弹性变形。

公开(公告)号：US20170013171A1

公开(公告)日：2017-01-12

申请号：US15198421

申请日：2016-06-30

申请人： Hiroyuki Igawa ,  Hideki Kamaji

发明人： Hiroyuki Igawa ,  Hideki Kamaji

IPC分类号： H04N1/52 ,  H04N1/60 ,  H04N1/405 ,  G03G15/01

CPC分类号： H04N1/4056 ,  G03G15/01 ,  G03G15/04027 ,  G06K15/14 ,  G06K15/1881 ,  H04N1/4051 ,  H04N1/409 ,  H04N1/52 ,  H04N1/58 ,  H04N2201/0094

摘要： An image processing apparatus includes: an image determining unit configured to determine a gradation value for each predetermined range in input image data; and a screen generator configured to arrange dot images around a plurality of growth centers in a halftone dot screen to form respective dot blocks if an input area rate indicating a ratio of black to white in dot images at the gradation value is smaller than a value at which an image defect occurs, and form bridges to connect adjacent dot blocks during a smallest gradation number if distances between the adjacent dot blocks decrease to a predetermined value or less along with growth of the dot blocks, to form a void halftone dot image.

摘要翻译： 图像处理装置包括：图像确定单元，被配置为确定输入图像数据中的每个预定范围的灰度值; 以及屏幕生成器，被配置为如果在灰度值中指示点图像中的黑色与白色的比例的输入区域率小于所述灰度值的值，则在半色调点屏幕中围绕多个生长中心布置点图像以形成相应的点块 如果相邻点块之间的距离随着点块的增长而减小到预定值或更小，则形成用于在最小灰度数字期间连接相邻点块的桥，以形成空白半色调点图像。

公开(公告)号：US09503611B2

公开(公告)日：2016-11-22

申请号：US14809953

申请日：2015-07-27

申请人： Hiroyuki Igawa ,  Hideki Kamaji

发明人： Hiroyuki Igawa ,  Hideki Kamaji

IPC分类号： H04N1/46 ,  G06K15/00 ,  H04N1/40 ,  H04N1/405

CPC分类号： H04N1/40 ,  G06K15/1822 ,  G06K15/1877 ,  G06K15/1881 ,  H04N1/4058

摘要： An aspect of the invention provides an image forming apparatus storing first, second, and third dither pattern groups. The first group contains a plurality of line screens, each associated with one of gray levels in a first range, varying such that as the gray level increases, the line width increases. The second group contains a plurality of void-dot screens, each associated with one of gray levels higher than those in the first range, varying such that as the gray level increases, dots increase to reduce void portions surrounded by the dots. The third group contains, for switching from the line screen to the void-dot screen, a plurality of dither patterns varying such that as the gray level increases from a reference gray level, adjacent lines are connected at joint portions tapered toward tip ends in a manner that a position that gradually advances from the tip ends to basal ends.

摘要翻译： 本发明的一个方面提供一种存储第一，第二和第三抖动图案组的图像形成装置。 第一组包含多个线屏幕，每个线屏幕与第一范围中的灰度级之一相关联，改变为随着灰度级增加，线宽度增加。 第二组包含多个空白点屏幕，每个空白点屏幕与灰度级高于第一范围中的灰度级别之一变化，使得当灰度级增加时，点增加以减少由点包围的空隙部分。 第三组包含用于从线屏幕切换到空白点屏幕的多个抖动图案，其变化使得当灰度级从参考灰度级增加时，相邻线路连接在尖端处的接合部分 方式是从尖端到基端逐渐前进的位置。

公开(公告)号：US20160155031A1

公开(公告)日：2016-06-02

申请号：US14955990

申请日：2015-12-01

申请人： Hiroyuki Igawa ,  Hideki Kamaji

发明人： Hiroyuki Igawa ,  Hideki Kamaji

IPC分类号： G06K15/02 ,  G06K15/14

CPC分类号： H04N1/4051 ,  G06K15/1881

摘要： An image processing apparatus stores a first dither pattern group that includes dither patterns each corresponding to a gradation value in a first range and formed by line screens in which widths of lines are increased with an increase in the gradation value, a second dither pattern group that includes dither patterns each corresponding to a gradation value in a second range higher than the gradation value in the first range, and formed by void dot screens in which number of dots is increased and void regions surrounded by the dots are decreased with an increase in the gradation value, and a third dither pattern group that includes dither patterns for switching from the line screen to the void dot screen, switching to the void dot screen being completed before a first reference gradation value at which an image defect occurs for received image data is reached.

摘要翻译： 图像处理装置存储第一抖动图案组，该第一抖动图案组包括与第一范围中的灰度值对应的抖动图案，并且通过随着灰度值的增加线宽增加的线条画面形成;第二抖动图案组， 包括各自对应于高于第一范围中的灰度值的第二范围内的灰度值的抖动图案，并且由点数增加的空白点画面和由点包围的空隙区域随着 灰度值和第三抖动图案组，其包括用于从线屏幕切换到空白点屏幕的抖动图案，切换到在接收图像数据发生图像缺陷的第一参考灰度值之前完成的空白点屏幕是 到达。

公开(公告)号：US20160034794A1

公开(公告)日：2016-02-04

申请号：US14809953

申请日：2015-07-27

申请人： Hiroyuki IGAWA ,  Hideki KAMAJI

发明人： Hiroyuki IGAWA ,  Hideki KAMAJI

IPC分类号： G06K15/02

CPC分类号： H04N1/40 ,  G06K15/1822 ,  G06K15/1877 ,  G06K15/1881 ,  H04N1/4058

摘要： An aspect of the invention provides an image forming apparatus storing first, second, and third dither pattern groups. The first group contains a plurality of line screens, each associated with one of gray levels in a first range, varying such that as the gray level increases, the line width increases. The second group contains a plurality of void-dot screens, each associated with one of gray levels higher than those in the first range, varying such that as the gray level increases, dots increase to reduce void portions surrounded by the dots. The third group contains, for switching from the line screen to the void-dot screen, a plurality of dither patterns varying such that as the gray level increases from a reference gray level, adjacent lines are connected at joint portions tapered toward tip ends in a manner that a position that gradually advances from the tip ends to basal ends.

摘要翻译： 本发明的一个方面提供一种存储第一，第二和第三抖动图案组的图像形成装置。 第一组包含多个线屏幕，每个线屏幕与第一范围中的灰度级之一相关联，改变为随着灰度级增加，线宽度增加。 第二组包含多个空白点屏幕，每个空白点屏幕与灰度级高于第一范围中的灰度级别之一变化，使得当灰度级增加时，点增加以减少由点包围的空隙部分。 第三组包含用于从线屏幕切换到空白点屏幕的多个抖动图案，其变化使得当灰度级从参考灰度级增加时，相邻线路连接在尖端处的接合部分 方式是从尖端到基端逐渐前进的位置。

公开(公告)号：US20070019976A1

公开(公告)日：2007-01-25

申请号：US11477673

申请日：2006-06-30

申请人： Naoto Watanabe ,  Shin Hasegawa ,  Hideki Kamaji ,  Shinji Kato ,  Hitoshi Ishibashi ,  Kohta Fujimori ,  Kayoko Tanaka ,  Yuushi Hirayama ,  Takashi Enami ,  Shinji Kobayashi ,  Kazumi Kobayashi ,  Fukutoshi Uchida ,  Noboru Sawayama

发明人： Naoto Watanabe ,  Shin Hasegawa ,  Hideki Kamaji ,  Shinji Kato ,  Hitoshi Ishibashi ,  Kohta Fujimori ,  Kayoko Tanaka ,  Yuushi Hirayama ,  Takashi Enami ,  Shinji Kobayashi ,  Kazumi Kobayashi ,  Fukutoshi Uchida ,  Noboru Sawayama

IPC分类号： G03G15/00

CPC分类号： G03G15/5058 ,  G03G2215/00042 ,  G03G2215/00059 ,  G03G2215/0119

摘要： An image forming method and apparatus capable of implementing accurately and constantly an improved conversion of the amount of toner adhesion over the entire range of the amount of adhesion. The method includes the steps of computing a normalization value as a relative output ratio of the regular reflection output to a background regular reflection component from the surface extracted from the regular reflection light, in which the regular reflection output is obtained by detecting a plurality of gradation toner patterns with a sensor configured to simultaneously detect regular reflection light and diffuse reflection light; obtaining a diffuse reflection output conversion factor by either (1) subtracting the normalization value multiplied by the diffuse reflection output voltage generated by the surface from the diffuse reflection output voltage, or (2) subtracting the normalization value multiplied by a diffuse reflection output voltage increment, which is computed as the difference between the diffuse reflection output voltage and another diffuse reflection output voltage obtained when a light emitting device is turned off, from the diffuse reflection output voltage increment; and subjecting the relation between the diffuse reflection output conversion factor and the amount of adhesion to a polynomial approximation.

摘要翻译： 一种图像形成方法和装置，其能够在粘合量的整个范围内精确地和持续地实现调色剂粘附量的改进转换。 该方法包括以下步骤：从通过从正反射光提取的表面计算正规反射输出与背景常规反射分量的相对输出比的归一化值，其中通过检测多个等级获得正则反射输出 具有传感器的调色剂图案被配置为同时检测正常反射光和漫反射光; 通过（1）从扩散反射输出电压减去由表面产生的漫反射输出电压的归一化值，或（2）减去乘以漫反射输出电压增量的归一化值，获得漫反射输出转换因子 ，其被计算为漫反射输出电压与发光装置关闭时获得的另一漫反射输出电压之间的差; 并将漫反射输出转换因子与粘附量之间的关系进行多项式近似。