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1. 发明公开

EP1188565A3 Printing and compensating for image quality degradation 有权
标题翻译：打印和补偿的画质损失
公开(公告)号：EP1188565A3
公开(公告)日：2003-06-11
申请号：EP01119110.3
申请日：2001-08-08
申请人： Hewlett Packard Company, a Delaware Corporation
发明人： Cluet, Miquel , Ymbern, Marcelo , Subirada, Francesc
IPC分类号： B41J2/165
CPC分类号： B41J2/2139 , G06K15/10 , G06K2215/0085 , H04N1/4015
摘要： Apparatus and method find and compensate for misaimed printing elements in an array (223-226) ― or other sources of quality degradation ― using (63, 80) the elements to print a representative image (Figs. 1, 2), such as an area fill (11-14, 11'-14', 21-24, 21'-24', 31-34, 31'-34', 41-44, 41'-44'; 51-58, 51'-58'), that does not display individual mechanical properties e. g. aiming as such, but may exhibit interelement effects. Automatically, quality of that image is measured (72) and operation modified (83) for later printing based on degradation found. In one invention form, at least one quality-influencing parameter is varied (64) and measured quality (65) is then correlated (81) with the variation to guide modification. Another form quantifies (82) departure (151, 18) from image regularity (159, 19) along the array, and applies (83) the values to derive (84) reduced element-usage weights (15-17, 15'-17') for use along the array ― best by following a formula to obtain the weights from the departures. This reduces banding by taking incorrectly aimed elements wholly or partially out of service. Measurement is best done by scanning a sensor 251 along the image in an advance axis, and analyzing variations (65) in sensor signals (ideally in frequency); analysis best includes finding image nonuniformity.

2. 发明公开

EP1308287A1 Method and system for callibrating ink ejection elements in an image forming device 有权
标题翻译：在图像形成设备的方法与系统喷墨元件的校准
公开(公告)号：EP1308287A1
公开(公告)日：2003-05-07
申请号：EP02022759.1
申请日：2002-10-11
申请人： Hewlett Packard Company, a Delaware Corporation
发明人： Gaston, David , Subirada, Francesc , Soler, Xavier
IPC分类号： B41J2/165
CPC分类号： B41J2/16579
摘要： By implementation of an optical scanner (80), the calibration of printheads (316-322) of a printing mechanism (20) 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：通过执行光学扫描仪（80），一打印机构（20）的打印头（316-322）的校准可以在一段相对短的周期期间执行如相对于已知的技术。在一个方面，为了执行校准所需要的时间可以基本上凭借视图光学扫描器的相对宽的场的减少。视图基因反弹的相对宽的字段启用对测试模式的扫描以相对较少数量的扫描的传递被执行，因此减少了执行扫描操作以及校准操作所需的时间。此外，扫描操作可以产生相对更准确的结果相比于公知的扫描操作。在一个方面，光学扫描仪能够凭借自己的更高的分辨能力检测打印介质上的墨水的小滴。在另一个方面中，所有的印刷的颜色的可精确地设定通过实施包含在光学扫描器一个红，绿，蓝（RGB）电荷耦合器件（CCD）的检测。

3. 发明公开

EP1188565A2 Printing and compensating for image quality degradation 有权
标题翻译： Drucken und Kompensieren desBildqualitätsverlustes
公开(公告)号：EP1188565A2
公开(公告)日：2002-03-20
申请号：EP01119110.3
申请日：2001-08-08
申请人： Hewlett Packard Company, a Delaware Corporation
发明人： Cluet, Miquel , Ymbern, Marcelo , Subirada, Francesc
IPC分类号： B41J2/165
CPC分类号： B41J2/2139 , G06K15/10 , G06K2215/0085 , H04N1/4015
摘要： Apparatus and method find and compensate for misaimed printing elements in an array (223-226) ― or other sources of quality degradation ― using (63, 80) the elements to print a representative image (Figs. 1, 2), such as an area fill (11-14, 11'-14', 21-24, 21'-24', 31-34, 31'-34', 41-44, 41'-44'; 51-58, 51'-58'), that does not display individual mechanical properties e. g. aiming as such, but may exhibit interelement effects. Automatically, quality of that image is measured (72) and operation modified (83) for later printing based on degradation found. In one invention form, at least one quality-influencing parameter is varied (64) and measured quality (65) is then correlated (81) with the variation to guide modification. Another form quantifies (82) departure (151, 18) from image regularity (159, 19) along the array, and applies (83) the values to derive (84) reduced element-usage weights (15-17, 15'-17') for use along the array ― best by following a formula to obtain the weights from the departures. This reduces banding by taking incorrectly aimed elements wholly or partially out of service. Measurement is best done by scanning a sensor 251 along the image in an advance axis, and analyzing variations (65) in sensor signals (ideally in frequency); analysis best includes finding image nonuniformity.
摘要翻译：装置和方法利用（63,80）元素来打印代表性图像（图1,2），找到并补偿阵列（223-226）中的误打印元件（或质量劣化的其他来源）（图1,2）区域填充（11-14,11'-14'，21-24,21'-24'，31-34,31'-34'，41-44,41'-44'; 51-58,51'- 58'），不显示各自的机械性能e。 G。瞄准本身，但可能会显示出联合效应。自动地测量该图像的质量（72）和操作修改（83），以便根据发现的劣化进行后续打印。在一种发明形式中，改变至少一个质量影响参数（64），然后将测量质量（65）与引导修改的变化相关联（81）。另一种形式从数组中量化（82）出发（151,18）与图像规律性（159,19），并应用（83）该值以导出（84）减少的元素使用权重（15-17,15'-17 '）沿着阵列使用 - 最好是通过遵循一个公式从出发点获取权重。通过将完全或部分不服务的错误的目标元素减少到捆绑。通过沿着前进轴沿着图像扫描传感器251，并且分析传感器信号（理想地在频率上）的变化（65），最好进行测量。分析最好包括发现图像不均匀性。

4. 发明授权

EP1176802B1 Techniques for measuring the position of marks on media and for aligning inkjet devices 有权
标题翻译：用于测量在介质上的标记的位置和用于对准喷墨器件的技术
公开(公告)号：EP1176802B1
公开(公告)日：2009-09-09
申请号：EP01118313.4
申请日：2001-07-27
申请人： Hewlett-Packard Company (a Delaware Corporation)
发明人： Castano, Jorge , Subirada, Francesc
IPC分类号： H04N1/50
CPC分类号： H04N1/50 , B41J2/2135 , B41J19/145

5. 发明公开

EP1176802A3 Techniques for measuring the position of marks on media and for aligning inkjet devices 有权
标题翻译：用于测量在介质上的标记的位置和用于对准喷墨器件的技术
公开(公告)号：EP1176802A3
公开(公告)日：2004-03-03
申请号：EP01118313.4
申请日：2001-07-27
申请人： Hewlett Packard Company, a Delaware Corporation
发明人： Castano, Jorge , Subirada, Francesc
IPC分类号： H04N1/50
CPC分类号： H04N1/50 , B41J2/2135 , B41J19/145
摘要： An optical sensor (80) for detecting the position of marks on a medium (84), wherein relative motion is provided between the optical sensor and the medium during an optical sensing operation. The optical sensor produces an electrical sensor signal (86A), and has a field of view at the media in a direction of the relative movement. The marks have a nominal dimension in the direction of the relative movement, and the field of view is larger than the nominal dimension. This produces a sensor signal with a clear and relatively sharp peak in response to scanning the media mark. A method of sensing locations of marks printed by ink-jet nozzles of a plurality of printheads mounted on a scanning carriage, which includes printing an alignment pattern (150) on a print medium, the alignment pattern comprising a set of target or reference marks printed using a subset of the nozzles on each of the plurality of printheads, and a set of color marks (170) printed using a subset of the nozzles from only one of the printheads.

6. 发明授权

EP1188565B1 Printing and compensating for image quality degradation 有权
标题翻译：打印和补偿的画质损失
公开(公告)号：EP1188565B1
公开(公告)日：2005-11-23
申请号：EP01119110.3
申请日：2001-08-08
申请人： Hewlett Packard Company, a Delaware Corporation
发明人： Cluet, Miquel , Ymbern, Marcelo , Subirada, Francesc
IPC分类号： B41J2/165
CPC分类号： B41J2/2139 , G06K15/10 , G06K2215/0085 , H04N1/4015

7. 发明公开

EP1176802A2 Techniques for measuring the position of marks on media and for aligning inkjet devices 有权
标题翻译：用于测量在介质上的标记的位置和用于对准喷墨器件的技术
公开(公告)号：EP1176802A2
公开(公告)日：2002-01-30
申请号：EP01118313.4
申请日：2001-07-27
申请人： Hewlett Packard Company, a Delaware Corporation
发明人： Castano, Jorge , Subirada, Francesc
IPC分类号： H04N1/50
CPC分类号： H04N1/50 , B41J2/2135 , B41J19/145
摘要： An optical sensor (80) for detecting the position of marks on a medium (84), wherein relative motion is provided between the optical sensor and the medium during an optical sensing operation. The optical sensor produces an electrical sensor signal (86A), and has a field of view at the media in a direction of the relative movement. The marks have a nominal dimension in the direction of the relative movement, and the field of view is larger than the nominal dimension. This produces a sensor signal with a clear and relatively sharp peak in response to scanning the media mark. A method of sensing locations of marks printed by ink-jet nozzles of a plurality of printheads mounted on a scanning carriage, which includes printing an alignment pattern (150) on a print medium, the alignment pattern comprising a set of target or reference marks printed using a subset of the nozzles on each of the plurality of printheads, and a set of color marks (170) printed using a subset of the nozzles from only one of the printheads.
摘要翻译：用于检测介质（84）worin相对运动上的标记的位置的光学传感器（80）设置在光学传感器和光学处感测操作期间在介质之间。光学传感器产生电检测信号（86A），并且具有的视场在所述相对运动的方向上的介质。这些标记具有标称尺寸尺寸名义上在相对移动的方向，并且视场比越大。这产生具有清晰和相对尖锐的峰的传感器信号响应于扫描媒体标记。安装在一个扫描滑架，其包括在打印介质上的对准图案（150）的印刷感测由打印头的多个喷墨喷嘴的印刷标记的位置的方法，包括一组目标或参考标记的对准图案印刷使用每个打印头的多个喷嘴的一个子集，并且一个（170）设定的色彩标记的使用仅来自所述打印头的一个喷嘴的一个子集打印。

8. 发明授权

EP1197916B1 Apparatus and method for mitigating colorant-deposition errors in incremental printing 有权
标题翻译：装置和方法用于染料沉积误差的用于逐步压的降低
公开(公告)号：EP1197916B1
公开(公告)日：2008-07-30
申请号：EP01124473.8
申请日：2001-10-11
申请人： Hewlett Packard Company, a Delaware Corporation
发明人： Donovan, David H. , Lammens, Johan , Boleda, Miquel , Subirada, Francesc
IPC分类号： G06K15/10 , B41J2/21 , H04N1/60 , B41J29/393 , B41J19/78
CPC分类号： H04N1/4015 , G06K15/102 , G06K2215/0094

9. 发明授权

EP1308287B1 Method and system for callibrating ink ejection elements in an image forming device 有权
标题翻译：在图像形成设备的方法与系统喷墨元件的校准
公开(公告)号：EP1308287B1
公开(公告)日：2007-10-03
申请号：EP02022759.1
申请日：2002-10-11
申请人： Hewlett Packard Company, a Delaware Corporation
发明人： Gaston, David , Subirada, Francesc , Soler, Xavier
IPC分类号： B41J2/165
CPC分类号： B41J2/16579

10. 发明公开

EP1197916A3 Apparatus and method for mitigating colorant-deposition errors in incremental printing 有权
标题翻译：装置和方法用于染料沉积误差的用于逐步压的降低
公开(公告)号：EP1197916A3
公开(公告)日：2003-03-26
申请号：EP01124473.8
申请日：2001-10-11
申请人： Hewlett Packard Company, a Delaware Corporation
发明人： Donovan, David H. , Lammens, Johan , Boleda, Miquel , Subirada, Francesc
IPC分类号： G06K15/10 , B41J2/21 , H04N1/60 , B41J29/393 , B41J19/78
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.

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