公开(公告)号：US07417768B1

公开(公告)日：2008-08-26

申请号：US09688610

申请日：2000-10-13

申请人： David H. Donovan ,  Miquel Boleda ,  Johan Lammens ,  Francesc Subirada

发明人： David H. Donovan ,  Miquel Boleda ,  Johan Lammens ,  Francesc Subirada

IPC分类号： G06K15/00 ,  H04N1/40

CPC分类号： H04N1/4015 ,  G06K15/102 ,  G06K2215/0094

摘要： CDE is measured for each nozzle array, to enable modification of a mapping between input image data and intended printing marks to compensate for the CDE. Printing proceeds using the modified mapping, which is either an optical-density transformation of data to printing marks or a spatial-resolution relation between image data and intended pixel grid. The density transformation preferably includes a dither mask (but can be error-diffusion thresholding instead); the resolution relation includes scaling of image data to pixel grid. For some invention forms, CDE includes printing-density defects, measured and used to derive a correction pattern—in turn used to modify halftone thresholding. For other forms CDE includes swath-height error, but still this is measured and used to derive a correction pattern etc. For still other forms, however, CDE includes swath-height error and correction takes the form of scaling. When the halftoning forms are applied to plural-pass printing, a printmask is used to map the dither mask etc. to the nozzle array, enabling application of the correction to the mask. Halftone forms ideally uses a gamma function, though threshold or linear corrections are possible instead. Halftone correction is effective in single-pass printing. The swath-height correction can modify heights of all nozzle arrays. Computations are done at most only once for a full image.

摘要翻译： 测量每个喷嘴阵列的CDE，以便能够修改输入图像数据和预期打印标记之间的映射，以补偿CDE。 使用修改的映射进行打印，该映射是数据到打印标记的光密度变换或图像数据与预期像素网格之间的空间分辨率关系。 密度变换优选包括抖动掩模（但可以是误差扩散阈值代替）; 分辨率关系包括将图像数据缩放到像素网格。 对于一些发明形式，CDE包括测量并用于导出校正模式的印刷密度缺陷，反过来用于修改半色调阈值。 对于其他形式，CDE包括扫描高度误差，但仍然被测量并用于导出校正模式等。然而，对于其他形式，CDE包括幅高错误，校正采用缩放的形式。 当将半色调形式应用于多遍打印时，使用打印掩模将抖动掩模等映射到喷嘴阵列，使得能够对掩模应用校正。 半色调形式理想地使用伽玛功能，尽管可以改变阈值或线性校正。 半色调校正在单程打印中有效。 扫描高度校正可以改变所有喷嘴阵列的高度。 对于完整图像，计算最多只能完成一次。

公开(公告)号：US07055925B2

公开(公告)日：2006-06-06

申请号：US10632011

申请日：2003-07-31

申请人： Francesc Subirada ,  David Gaston ,  Oscar Ciordia

发明人： Francesc Subirada ,  David Gaston ,  Oscar Ciordia

IPC分类号： B41J29/393

CPC分类号： H04N1/23

摘要： Techniques for calibrating a scanner mounted on a scanning carriage of an image forming device. In one embodiment, a method of calibrating an optical sensor of a color image forming device includes positioning a prefabricated optical sensor target at the service area of the image forming device, the target including a plurality of target patches of predetermined different colors, moving the carriage to the service area, acquiring one or more images of the plurality of target patches, and using the one or more images to perform a plurality of calibrations of the optical sensor. In another embodiment, a method of measuring a reference position of a carriage mounted sensor array for an image forming device includes moving the carriage to a service area, generating a light beam from a carriage-mounted light source at a position adjacent an end of a sensor array, the light beam at an acute angle relative to an array axis, reflecting the beam from a reference target mounted in the service area at a known position, acquiring an image of the reflected beam by the sensor array, and using the location of a high intensity area of the image to determine the reference position of the optical sensor.

摘要翻译： 用于校准安装在图像形成装置的扫描托架上的扫描仪的技术。 在一个实施例中，一种校准彩色图像形成装置的光学传感器的方法包括将预制的光学传感器目标定位在图像形成装置的服务区域，目标包括多个预定不同颜色的目标斑块，移动滑架 获取所述多个目标贴片的一个或多个图像，并使用所述一个或多个图像来执行所述光学传感器的多个校准。 在另一个实施例中，一种测量用于图像形成装置的滑架安装的传感器阵列的基准位置的方法包括将滑架移动到服务区域，在邻近一端的位置处从支架安装的光源产生光束 传感器阵列，相对于阵列轴成锐角的光束，将来自安装在服务区域中的参考目标的光束反射到已知位置，通过传感器阵列获取反射光束的图像，并使用 图像的高强度区域来确定光学传感器的参考位置。

公开(公告)号：US06910754B2

公开(公告)日：2005-06-28

申请号：US10696311

申请日：2003-10-29

申请人： David Gaston ,  Francesc Subirada ,  Xavier Soler

发明人： David Gaston ,  Francesc Subirada ,  Xavier Soler

IPC分类号： B41J2/01 ,  B41J2/165 ,  B41J29/46 ,  B41J29/393

CPC分类号： B41J2/16579

摘要： By implementation of an optical scanner, the calibration of printheads of a printing mechanism may be performed in a relatively short period of time as compared to known techniques. In one respect, the time required to perform the calibration may be substantially reduced by virtue of the relatively wide field of view of the optical scanner. The relatively wide field of view generally enables for the scanning of test patterns to be performed with a relatively fewer number of scanning passes, thus reducing the time required to perform the scanning operations as well as the calibration operations. In addition, the scanning operations may yield relatively more accurate results as compared to known scanning operations. In one respect, optical scanners are capable of detecting smaller drops of ink on print media by virtue of their higher resolution capabilities. In another respect, all of the printed colors may be accurately detected through implementation of a red, green, blue (RGB) charge coupled device (CCD) contained in the optical scanners.

摘要翻译： 通过实施光学扫描器，与已知技术相比，打印机构的打印头的校准可以在相对较短的时间段内进行。 在一个方面，由于光学扫描仪的相对较宽的视野，进行校准所需的时间可以大大减少。 相对较宽的视场通常能够以相对较少数量的扫描通过执行测试图案的扫描，从而减少执行扫描操作所需的时间以及校准操作。 此外，与已知的扫描操作相比，扫描操作可以产生相对更准确的结果。 在一个方面，光学扫描仪能够通过其较高的分辨率能力来检测打印介质上较小的墨滴。 在另一方面，可以通过实现光学扫描仪中包含的红色，绿色，蓝色（RGB）电荷耦合器件（CCD）来精确地检测所有印刷的颜色。

公开(公告)号：US20050024410A1

公开(公告)日：2005-02-03

申请号：US10632011

申请日：2003-07-31

申请人： Francesc Subirada ,  David Gaston ,  Oscar Ciordia

发明人： Francesc Subirada ,  David Gaston ,  Oscar Ciordia

IPC分类号： B41J2/01 ,  H04N1/23 ,  B41J29/38

CPC分类号： H04N1/23

摘要： Techniques for calibrating a scanner mounted on a scanning carriage of an image forming device. The scanner array can also be used for print media border location.

摘要翻译： 用于校准安装在图像形成装置的扫描托架上的扫描仪的技术。 扫描仪阵列也可用于打印介质边框位置。

公开(公告)号：US06547362B2

公开(公告)日：2003-04-15

申请号：US09766514

申请日：2001-01-19

申请人： Francesc Subirada ,  James A Mott ,  Oscar Martinez

发明人： Francesc Subirada ,  James A Mott ,  Oscar Martinez

IPC分类号： B41J29393

CPC分类号： B41J11/42 ,  B41J2/2132 ,  B41J29/393

摘要： A test pattern is scanned to find ideal print-medium advance for a pen (or other marking device). The pattern has a medium; and, marked on it, image patches each with overlapped swaths stepped by different distances. At best there are different-color pens; and for each distance a set of patches, each with a patch for each color (preferably area fills at sensitive tones by color). All patches in a set are best adjacent along a scan direction, with alignment lines above each set across the whole pattern, and a nozzle-conditioning patch at each image patch. A processor prints the pattern, operates a sensor and uses its signals to find optimum advance. The system finds and prints with ideal advance for a most-active pen; or weighs pen activity to find an optimum for all pens based on certain statistical and/or prospective choices.

公开(公告)号：US07111918B2

公开(公告)日：2006-09-26

申请号：US10766554

申请日：2004-08-13

申请人： Carles Flotats ,  David Claramunt ,  Jose M. Rio Doval ,  Rodrigo Ruiz ,  Francesc Subirada ,  Joaquim Veciana ,  Marc Jansa

发明人： Carles Flotats ,  David Claramunt ,  Jose M. Rio Doval ,  Rodrigo Ruiz ,  Francesc Subirada ,  Joaquim Veciana ,  Marc Jansa

IPC分类号： B41J29/393 ,  B41J29/38

CPC分类号： H04N1/00681 ,  B41J11/0095 ,  H04N1/00702 ,  H04N1/00708 ,  H04N1/0074 ,  H04N1/0075 ,  H04N1/00774

摘要： A media-positioning sensor assembly in one embodiment of the invention is disclosed that includes a mechanism and a media-positioning sensor. The mechanism moves back and forth over media along a first axis. The media advances past the mechanism along a second axis perpendicular to the first axis. The media-positioning sensor is situated on the mechanism and is to detect positioning of the media relative to the mechanism along at least one of the first axis and the second axis.

公开(公告)号：US20060109294A1

公开(公告)日：2006-05-25

申请号：US10994766

申请日：2004-11-20

申请人： Santiago Garcia-Reyero ,  Joan-Manel Garcia ,  Francesc Subirada

发明人： Santiago Garcia-Reyero ,  Joan-Manel Garcia ,  Francesc Subirada

IPC分类号： B41J2/205

CPC分类号： B41J2/2139 ,  G06K15/107

摘要： When condition of a printing element (e.g. inkjet nozzle) changes, essentially full mask rows invoking the element are redone from scratch, best so as to fully satisfy pixel-grid neighbor conditions. This is faster than redoing a whole mask as in prior popup or precook/reheat methods, and yields better printouts than prior row-by-row mask revision (e.g. directly replacing a weak nozzle by a good one across whole rows). This method is best independent of prior mask versions, and uses no prebuilt matrix of backup/alternate entries. The number of rows redone is typically 7% to 14% below a nominal/baseline value.

摘要翻译： 当打印元件（例如喷墨喷嘴）的状况改变时，基本上完全满足像素网格相邻条件的调用该元件的完整的掩模行是从头重做的。 这比在以前的弹出或预先/预热/再加热方法中重做整个面罩更快，并且比现有的逐行掩模版本更好地打印出更好的打印输出（例如，直接用整个行代替弱喷嘴）。 该方法最好与先前的掩码版本无关，并且不使用备份/备用条目的预构建矩阵。 重新排列的行数通常比标称值/基准值低7％至14％。

公开(公告)号：US20050067558A1

公开(公告)日：2005-03-31

申请号：US10672913

申请日：2003-09-25

申请人： Rodrigo Ruiz ,  Carles Flotats ,  Francesc Subirada

发明人： Rodrigo Ruiz ,  Carles Flotats ,  Francesc Subirada

IPC分类号： B41J2/21 ,  H01J40/14

CPC分类号： B41J2/2135

摘要： A method and apparatus is used to detect and compensate for printhead rotation in an inkjet printer. The detecting operation includes receiving an initial image of a pattern taken from a medium as the printhead passes over the medium, receiving a subsequent image of the pattern taken from the medium as the printhead continues to pass over the medium, comparing the initial image of the pattern and the subsequent image of the pattern taken from the medium and identifying a rotation of the printhead in the ink-jet printer passing over the medium if the comparison indicates the initial image of the pattern is rotated relative to the subsequent image of the pattern. The compensation operation includes modifying the timing settings associated with the firing of the nozzles in the inkjet printhead to compensate for the rotation of the printhead.

摘要翻译： 使用方法和装置来检测和补偿喷墨打印机中的打印头旋转。 检测操作包括当打印头经过介质时接收从介质取出的图案的初始图像，当打印头继续通过介质时，接收从介质取出的图案的后续图像，比较第 图案和从介质取出的图案的后续图像，并且如果比较指示图案的初始图像相对于图案的后续图像旋转，则识别通过介质的喷墨打印机中的打印头的旋转。 补偿操作包括修改与喷墨打印头中的喷嘴的点火相关联的定时设置，以补偿打印头的旋转。

公开(公告)号：US06834928B2

公开(公告)日：2004-12-28

申请号：US10419322

申请日：2003-04-19

申请人： Jose M Rio Doval ,  Carles Flotats ,  David Claramunt ,  Marc Jansa ,  Francesc Subirada

发明人： Jose M Rio Doval ,  Carles Flotats ,  David Claramunt ,  Marc Jansa ,  Francesc Subirada

IPC分类号： B41J2938

CPC分类号： B41J13/0009

摘要： A method of an embodiment of the invention is disclosed in which a linear imaging array captures a first one pixel-wide image of media, and the media is effectively advanced relative to the linear imaging array. The linear imaging array captures a second one pixel-wide image of the media, and the first and the second one pixel-wide images are compared to determine relative advancement of the media.

摘要翻译： 公开了本发明实施例的方法，其中线性成像阵列捕获介质的第一个像素范围的图像，并且介质相对于线性成像阵列有效地前进。 线性成像阵列捕获媒体的第二个像素宽的图像，并且比较第一和第二个像素宽的图像以确定媒体的相对进步。

公开(公告)号：US06196652B1

公开(公告)日：2001-03-06

申请号：US09034722

申请日：1998-03-04

申请人： Francesc Subirada ,  Francisco Guerrero

发明人： Francesc Subirada ,  Francisco Guerrero

IPC分类号： B41J29393

CPC分类号： B41J2/2135 ,  B41J29/393

摘要： A calibration technique for a plurality of different color ink printheads which includes printing and scanning a test pattern which incorporates two different calibration adjustments from the same test pattern, with one calibration adjustment at right angles to the scan axis. Further calibration precision is provided by incorporating a controlled color background for the test pattern that minimizes light reflection, as well as basing printhead alignment on the overall swath height of the printheads rather than the centers of the printheads.

摘要翻译： 一种用于多种不同颜色墨水打印头的校准技术，其包括打印和扫描测试图案，该测试图案包含来自相同测试图案的两个不同的校准调整，其中一个校准调整与扫描轴成直角。 通过结合针对最小化光反射的测试图案的受控颜色背景以及将打印头对准基于打印头的整个幅高而不是打印头的中心来提供进一步的校准精度。