公开(公告)号：EP2444850A3

公开(公告)日：2017-06-14

申请号：EP11181321.8

申请日：2011-09-15

申请人： Ricoh Company, Ltd.

发明人： Okada, Tatsuhiko

IPC分类号： G03G15/00 ,  B41J2/45

CPC分类号： G03G15/5041 ,  B41J2/45

摘要： An image forming apparatus (G) includes a number-of-overlap-pixels determination unit (300) configured to determine number of the light emitting elements overlapping at ends of two light emitting element array units (2, 3) adjacent to each other in a main scanning direction based on transition of density in a plurality of test pattern images. A plurality of test pattern data are configured to cause the light emitting elements of each of the two light emitting element array units to operate such that a predetermined number of the turned on light emitting elements and the predetermined number of the turned off light emitting elements are alternately and repeatedly arranged, and positions of the turned on light emitting elements and the turned off light emitting elements of one of the two light emitting element array units are sequentially shifted for each of a plurality of test patterns.

摘要翻译： 一种图像形成设备（G），包括：重叠像素数确定单元（300），被配置为确定在彼此相邻的两个发光元件阵列单元（2,3）的端部处重叠的发光元件的数量 基于多个测试图案图像中的密度转变的主扫描方向。 多个测试图案数据被配置为使得两个发光元件阵列单元中的每个发光元件阵列单元的发光元件进行操作，使得预定数量的导通的发光元件和预定数量的熄灭的发光元件是 交替地和重复地布置，并且对于多个测试图案中的每一个，开启的发光元件和两个发光元件阵列单元中的一个发光元件阵列单元的关闭的发光元件的位置顺序地移位。

公开(公告)号：EP2444850A2

公开(公告)日：2012-04-25

申请号：EP11181321.8

申请日：2011-09-15

申请人： Ricoh Company, Ltd.

发明人： Okada, Tatsuhiko

IPC分类号： G03G15/00

CPC分类号： G03G15/5041 ,  B41J2/45

摘要： An image forming apparatus (G) includes a number-of-overlap-pixels determination unit (300) configured to determine number of the light emitting elements overlapping at ends of two light emitting element array units (2, 3) adjacent to each other in a main scanning direction based on transition of density in a plurality of test pattern images. A plurality of test pattern data are configured to cause the light emitting elements of each of the two light emitting element array units to operate such that a predetermined number of the turned on light emitting elements and the predetermined number of the turned off light emitting elements are alternately and repeatedly arranged, and positions of the turned on light emitting elements and the turned off light emitting elements of one of the two light emitting element array units are sequentially shifted for each of a plurality of test patterns.

摘要翻译： 图像形成装置（G）包括重叠像素数目决定单元（300），被配置为确定在彼此相邻的两个发光元件阵列单元（2,3）的端部重叠的发光元件的数量 基于多个测试图案图像中的浓度的转变的主扫描方向。 多个测试图案数据被配置为使两个发光元件阵列单元中的每一个的发光元件工作，使得预定数量的导通发光元件和预定数量的关闭发光元件为 交替重复排列，并且对于多个测试图案中的每一个，顺序地移动两个发光元件阵列单元之一的转向发光元件和关闭发光元件的位置。

公开(公告)号：EP2298565B1

公开(公告)日：2019-03-06

申请号：EP10175963.7

申请日：2010-09-09

申请人： Ricoh Company, Ltd.

发明人： Kobayashi, Masato ,  Satoh, Nobuyuki ,  Taki, Norikazu ,  Okada, Tatsuhiko ,  Sawada, Daisuke ,  Horikawa, Daisaku

IPC分类号： B41J11/44 ,  B41J11/46

公开(公告)号：EP2444850B1

公开(公告)日：2018-11-07

申请号：EP11181321.8

申请日：2011-09-15

申请人： Ricoh Company, Ltd.

发明人： Okada, Tatsuhiko

IPC分类号： G03G15/00 ,  B41J2/45

CPC分类号： G03G15/5041 ,  B41J2/45

摘要： An image forming apparatus (G) includes a number-of-overlap-pixels determination unit (300) configured to determine number of the light emitting elements overlapping at ends of two light emitting element array units (2, 3) adjacent to each other in a main scanning direction based on transition of density in a plurality of test pattern images. A plurality of test pattern data are configured to cause the light emitting elements of each of the two light emitting element array units to operate such that a predetermined number of the turned on light emitting elements and the predetermined number of the turned off light emitting elements are alternately and repeatedly arranged, and positions of the turned on light emitting elements and the turned off light emitting elements of one of the two light emitting element array units are sequentially shifted for each of a plurality of test patterns.

公开(公告)号：EP2298565A3

公开(公告)日：2013-12-25

申请号：EP10175963.7

申请日：2010-09-09

申请人： Ricoh Company Ltd.

发明人： Kobayashi, Masato ,  Satoh, Nobuyuki ,  Taki, Norikazu ,  Okada, Tatsuhiko ,  Sawada, Daisuke ,  Horikawa, Daisaku

IPC分类号： B41J11/44 ,  B41J11/46

CPC分类号： B41J11/44 ,  B41J11/46

摘要： A conveying distance control device includes a conveying roller; a first detecting unit detecting rotational positions of the conveying roller; a line sensor sequentially detecting marks arranged on a test chart; a calculation unit, and a control unit. The calculation unit calculates a skew angle between a line passing through positions of a first mark and a second mark and a conveying direction of the conveying roller. The control unit obtains conveying distance errors indicating differences between corrected conveying distances not including errors caused by the skew angle and a theoretical conveying distance of the marks in association with the rotational positions of the conveying roller, calculates a correction value for correcting a conveying distance of the conveying roller based on relationships between the conveying distance errors and the rotational positions of the conveying roller, and controls the conveying distance of the conveying roller based on the correction value.

公开(公告)号：EP2298565A2

公开(公告)日：2011-03-23

申请号：EP10175963.7

申请日：2010-09-09

申请人： Ricoh Company Ltd.

发明人： Kobayashi, Masato ,  Satoh, Nobuyuki ,  Taki, Norikazu ,  Okada, Tatsuhiko ,  Sawada, Daisuke ,  Horikawa, Daisaku

IPC分类号： B41J11/44 ,  B41J11/46

CPC分类号： B41J11/44 ,  B41J11/46

摘要： A conveying distance control device includes a conveying roller; a first detecting unit detecting rotational positions of the conveying roller; a line sensor sequentially detecting marks arranged on a test chart; a calculation unit, and a control unit. The calculation unit calculates a skew angle between a line passing through positions of a first mark and a second mark and a conveying direction of the conveying roller. The control unit obtains conveying distance errors indicating differences between corrected conveying distances not including errors caused by the skew angle and a theoretical conveying distance of the marks in association with the rotational positions of the conveying roller, calculates a correction value for correcting a conveying distance of the conveying roller based on relationships between the conveying distance errors and the rotational positions of the conveying roller, and controls the conveying distance of the conveying roller based on the correction value.

摘要翻译： 输送距离控制装置包括输送辊; 第一检测单元，检测输送辊的旋转位置; 线传感器，依次检测布置在测试图上的标记; 计算单元和控制单元。 计算单元计算通过第一标记的位置的线与第二标记之间的偏斜角和输送辊的输送方向。 所述控制单元获得指示与所述输送辊的旋转位置相关联的不包括由所述歪斜角度引起的误差和所述标记的理论输送距离的校正传送距离之间的差异的传送距离误差，计算校正传送距离的修正值 输送辊基于输送距离误差和输送辊的旋转位置之间的关系，并且基于校正值来控制输送辊的输送距离。