公开(公告)号：US06390587B1

公开(公告)日：2002-05-21

申请号：US09034866

申请日：1998-03-04

Applicant: Francesc Subirada

Inventor： Francesc Subirada

IPC: B41J29393

CPC classification number: B41J2/2135 ,  B41J29/393

Abstract: A test pattern is printed and thereafter scanned with a carriage-mounted optical sensor in order to automatically calibrate relative location and alignment between the separate printheads such as CYMK printheads in both the X-axis (media advance) and the Y-axis (carriage scan). To improve the precision of the calibration, the system and method employ small subset groupings of multiple test pattern samples with common reference markings. Each different test pattern is formed by multiple pairs of spaced-apart bars printed by each printhead in a subset associated with a common reference mark such as a magenta reference bar, and the resulting optically sensed measurements may then be averaged over the entire pattern.

Abstract translation: 打印测试图案，然后用支架安装的光学传感器进行扫描，以便自动校准X轴（介质提前）和Y轴（滑架扫描）中单独打印头（如CYMK打印头）之间的相对位置和对齐 ）。 为了提高校准的精度，系统和方法采用具有共同参考标记的多个测试样本样本的小组分组。 每个不同的测试图案由在与诸如品红色参考条的公共参考标记相关联的子集中的每个打印头打印的多对间隔开的条形成，然后可以在整个图案上平均所得到的光学感测的测量值。

公开(公告)号：US6164750A

公开(公告)日：2000-12-26

申请号：US034723

申请日：1998-03-04

Applicant: Francesc Subirada ,  Joan Villoldo

Inventor： Francesc Subirada ,  Joan Villoldo

IPC: B41J2/175 ,  B41J2/21 ,  B41J19/14 ,  B41J29/393

CPC classification number: B41J2/1755 ,  B41J2/1752 ,  B41J2/1753 ,  B41J2/2135 ,  B41J19/145 ,  B41J29/393

Abstract: A technique for printing a test pattern for calibrating a plurality of different color ink printheads includes printing a sequence of rows in a carriage scan direction, with at least some rows being printed at different constant speeds, respectively. Each row includes a repeated pattern of spaced apart blocks from one printhead which are optically scanned to determine the relative offset positions of the blocks as compared to another row in the test pattern. A single optimized adjustment is then determined. At least one portion of the test pattern is printed in a first direction scan, and is optically sensed in a return opposition direction scan. This technique is particularly useful for bi-directional color printing, and includes a print warming pattern in advance of the actual test pattern.

Abstract translation: 用于打印用于校准多个不同颜色的墨水打印头的测试图案的技术包括在滑架扫描方向上打印一行行，其中至少一些行分别以不同的恒定速度被打印。 每行包括与一个打印头间隔开的块的重复图案，其被光学扫描以确定与测试图案中的另一行相比的块的相对偏移位置。 然后确定单个优化的调整。 将测试图案的至少一部分印刷在第一方向扫描中，并且以反向反向扫描光学感测。 该技术对于双向彩色打印特别有用，并且包括在实际测试图案之前的打印加温模式。