公开(公告)号：US06494558B1

公开(公告)日：2002-12-17

申请号：US09693524

申请日：2000-10-20

Applicant: Jose Julio Doval ,  Albert Serra ,  Francesc Subirada

Inventor： Jose Julio Doval ,  Albert Serra ,  Francesc Subirada

IPC: B41J201

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

Abstract: A calibration technique, for a printer having a plurality of different color ink printheads, which includes printing and scanning a test pattern. The test pattern is printed by each printhead printing a plurality of swaths having a length and distanced apart from each other. An optical sensor is used to scan the printed test pattern. Calibration is performed for each head by reading the swath length and the relative spacing of the swath and comparing the length to the spacing. This comparison is used to find the directional error for each head.

Abstract translation: 一种用于具有多个不同颜色墨水打印头的打印机的校准技术，其包括打印和扫描测试图案。 测试图案由每个打印头打印出多个长度彼此远离的条带打印。 光学传感器用于扫描印刷的测试图案。 通过读取条带长度和条纹的相对间距并将长度与间距进行比较，对每个头进行校准。 该比较用于找出每个头的方向误差。

公开(公告)号：US06352331B1

公开(公告)日：2002-03-05

申请号：US08811412

申请日：1997-03-04

Applicant: Chris T. Armijo ,  Gonzalo Gaston ,  Javier Lagares ,  Antoni Gil ,  Francesc Subirada ,  Francisco Guerrero

Inventor： Chris T. Armijo ,  Gonzalo Gaston ,  Javier Lagares ,  Antoni Gil ,  Francesc Subirada ,  Francisco Guerrero

IPC: B41J29393

CPC classification number: B41J2/16579

Abstract: A nozzle detection test pattern has been developed which can be sensed by an optical sensor located on an inkjet printer carriage. By having the same nozzle print ink drops on multiple pixels to form a single thickened test line during multiple passes of the printhead, it is possible to thereafter scan across such test line and automatically determine by the light contrast ratios which nozzles are not firing properly. A green light LED is used to illuminate the magenta, cyan and black test patterns as they are being sensed, and a blue light LED is used to illuminate the yellow test pattern as it is being sensed. A separate test pattern is used for each printhead ink color. The test pattern constitutes six rows with forty test lines on each row for a printhead having 240 active nozzles.

Abstract translation: 已经开发出可以由位于喷墨打印机托架上的光学传感器感测的喷嘴检测测试图案。 通过在打印头的多次通过期间使相同的喷嘴印刷墨水滴在多个像素上以形成单个加厚的测试线，则可以在此之后扫描这样的测试线并且通过光对比度自动确定哪些喷嘴不能正确地发射。 绿光LED用于在被感测到的品红色，青色和黑色测试图案上照亮，并且蓝光LED用于在被感测时照亮黄色测试图案。 每个打印头墨水颜色都使用单独的测试图案。 测试图形构成六行，每列具有四十条测试线，用于具有240个主动喷嘴的打印头。

公开(公告)号：US07417768B1

公开(公告)日：2008-08-26

申请号：US09688610

申请日：2000-10-13

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

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

IPC: G06K15/00 ,  H04N1/40

CPC classification number: H04N1/4015 ,  G06K15/102 ,  G06K2215/0094

Abstract: 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.

Abstract translation: 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：US07413276B2

公开(公告)日：2008-08-19

申请号：US09941884

申请日：2001-08-28

Applicant: Joan Manuel Garcia ,  Francesc Subirada

Inventor： Joan Manuel Garcia ,  Francesc Subirada

IPC: B41J29/393

CPC classification number: B41J2/2132

Abstract: A diagnostic technique allows an easy visual detection of poor media advance calibration. The diagnostic technique employs a print mode that prints different areas of the plot at different passes with a controlled amount of advances between them. The dot positioning error in the different areas has a non-systematic nozzle contribution, that tends to cancel out, and a systematic contribution due to the accumulative media advance error. Different patterns can be used to make the dot positioning error due to the accumulative media advance error show up. By increasing the number of media advances between the printing of sets of pixels, e.g. pixels in a horizontal line, the effect of accumulated errors and the apparent visual effect is increased.

Abstract translation: 诊断技术允许容易的视觉检测差的介质提前校准。 诊断技术采用打印模式，其打印不同区域的不同区域，并在它们之间具有可控的进度。 不同区域的点定位误差具有趋于抵消的非系统喷嘴贡献，以及由于累积介质提前误差引起的系统贡献。 可以使用不同的图案，由于累积的介质提前错误显示而导致点定位错误。 通过增加打印像素组之间的媒体进度的数量，例如 水平线上的像素，累积误差的影响和视觉效果增加。

公开(公告)号：US07216952B2

公开(公告)日：2007-05-15

申请号：US10882381

申请日：2004-07-02

Applicant: David Claramunt ,  Carles Flotats ,  Jose M Rio Doval ,  Rodrigo Ruiz ,  Francesc Subirada ,  Marc Jansa ,  Xavier Soler ,  Fernando Juan

Inventor： David Claramunt ,  Carles Flotats ,  Jose M Rio Doval ,  Rodrigo Ruiz ,  Francesc Subirada ,  Marc Jansa ,  Xavier Soler ,  Fernando Juan

IPC: B41J29/393

CPC classification number: G03G15/5062 ,  B41J2/435 ,  G03G2215/0119 ,  G03G2215/0158

Abstract: A multicolor-printer has at least a first and a second print station, first and second optical sensors and a surface recordings comparator. The first and second print stations are arranged to print images on a surface of a moving recording medium. The first and second optical sensors view, at the first and second print stations, an area of the recording medium surface to obtain at least one first surface recording, in a manner related to the first print station's image printing, and second surface recordings, respectively. A storage is arranged to store the first surface recording. The surface recordings comparator is arranged to test, during the recording medium movement, for correspondence of second surface recordings with the stored first surface recording. The printer is arranged to repeatedly, within one image, register raster lines of the image of the second print station to corresponding raster lines of the image of the first print station in response to correspondences found between the first and second surface recordings.

Abstract translation: 多色打印机至少具有第一和第二印刷台，第一和第二光学传感器和表面记录比较器。 第一和第二打印站布置成在移动记录介质的表面上打印图像。 第一和第二光学传感器在第一和第二打印站处观察记录介质表面的区域，以分别以与第一打印站的图像打印相关的方式和第二表面记录来获得至少一个第一表面记录 。 存储器被布置成存储第一表面记录。 表面记录比较器布置成在记录介质运动期间测试第二表面记录与存储的第一表面记录的对应关系。 打印机被布置为在一个图像内重复地响应于在第一和第二表面记录之间找到的对应来将第二打印站的图像的光栅线记录到第一打印站的图像的相应光栅行。

公开(公告)号：US07034279B2

公开(公告)日：2006-04-25

申请号：US10672913

申请日：2003-09-25

Applicant: Rodrigo Ruiz ,  Carles Flotats ,  Francesc Subirada

Inventor： Rodrigo Ruiz ,  Carles Flotats ,  Francesc Subirada

IPC: H01J40/14

CPC classification number: B41J2/2135

Abstract: 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 inkjet 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.

Abstract translation: 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：US07023581B2

公开(公告)日：2006-04-04

申请号：US09919260

申请日：2001-07-30

Applicant: Pau Soler ,  Roger Vinas ,  Francisco Javier Rodriguez ,  Francesc Subirada

Inventor： Pau Soler ,  Roger Vinas ,  Francisco Javier Rodriguez ,  Francesc Subirada

IPC: B41J1/00 ,  G06F15/00 ,  H04N1/46

CPC classification number: H04N1/4078 ,  H04N1/6033

Abstract: To compensate for color-calibration sensor drift, a measurement of bare-print-medium tonal value is taken in immediate time juxtaposition to each color test pattern; measured bare-medium tone is then used to correct color-patch readings. A line sensor or the like, on the scanning printhead carriage, is used for the reading. Preferably two such readings are taken, one at each end of each test pattern; ideally separate scans of the bare medium are taken without any test-pattern patch to develop longterm and short-term drift profiles, for refining the corrections. To compensate for calibration error due to runout in the carriage track—particularly for wide-bed printers—sensor response to bare medium is used to represent variations in carriage-to-medium spacing along the track; these variations are corrected in later sensor use.

公开(公告)号：US20060033769A1

公开(公告)日：2006-02-16

申请号：US10766554

申请日：2004-08-13

Applicant: Carles Flotats ,  David Claramunt ,  Jose Rio Doval ,  Rodrigo Ruiz ,  Francesc Subirada ,  Joaquim Veciana ,  Marc Jansa

Inventor： Carles Flotats ,  David Claramunt ,  Jose Rio Doval ,  Rodrigo Ruiz ,  Francesc Subirada ,  Joaquim Veciana ,  Marc Jansa

IPC: B41J29/393

CPC classification number: H04N1/00681 ,  B41J11/0095 ,  H04N1/00702 ,  H04N1/00708 ,  H04N1/0074 ,  H04N1/0075 ,  H04N1/00774

Abstract: 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.

Abstract translation: 公开了一种在本发明的一个实施例中的介质定位传感器组件，其包括机构和介质定位传感器。 该机构沿着第一轴线在介质上来回移动。 介质沿垂直于第一轴线的第二轴线前进过机构。 介质定位传感器位于机构上，并且是沿着第一轴线和第二轴线中的至少一个来检测介质相对于机构的定位。

公开(公告)号：US20050185009A1

公开(公告)日：2005-08-25

申请号：US10882381

申请日：2004-07-02

Applicant: David Claramunt ,  Carles Flotats ,  Jose Rio Doval ,  Rodrigo Ruiz ,  Francesc Subirada ,  Marc Jansa ,  Xavier Soler ,  Fernando Juan

Inventor： David Claramunt ,  Carles Flotats ,  Jose Rio Doval ,  Rodrigo Ruiz ,  Francesc Subirada ,  Marc Jansa ,  Xavier Soler ,  Fernando Juan

IPC: B41J2/525 ,  B41J2/435 ,  G03G15/00 ,  H04N1/04 ,  B41J2/155

CPC classification number: G03G15/5062 ,  B41J2/435 ,  G03G2215/0119 ,  G03G2215/0158

Abstract: A multicolor-printer has at least a first and a second print station, first and second optical sensors and a surface recordings comparator. The first and second print stations are arranged to print images on a surface of a moving recording medium. The first and second optical sensors view, at the first and second print stations, an area of the recording medium surface to obtain at least one first surface recording, in a manner related to the first print station's image printing, and second surface recordings, respectively. A storage is arranged to store the first surface recording. The surface recordings comparator is arranged to test, during the recording medium movement, for correspondence of second surface recordings with the stored first surface recording. The printer is arranged to repeatedly, within one image, register raster lines of the image of the second print station to corresponding raster lines of the image of the first print station in response to correspondences found between the first and second surface recordings.

Abstract translation: 多色打印机至少具有第一和第二印刷台，第一和第二光学传感器和表面记录比较器。 第一和第二打印站布置成在移动记录介质的表面上打印图像。 第一和第二光学传感器在第一和第二打印站处观察记录介质表面的区域，以分别与第一打印站的图像打印和第二表面记录相关的方式获得至少一个第一表面记录 。 存储器被布置成存储第一表面记录。 表面记录比较器布置成在记录介质运动期间测试第二表面记录与存储的第一表面记录的对应关系。 打印机被布置为在一个图像内重复地响应于在第一和第二表面记录之间找到的对应来将第二打印站的图像的光栅线记录到第一打印站的图像的相应光栅行。

公开(公告)号：US06669322B2

公开(公告)日：2003-12-30

申请号：US09984937

申请日：2001-10-31

Applicant: David Gaston ,  Francesc Subirada ,  Xavier Soler

Inventor： David Gaston ,  Francesc Subirada ,  Xavier Soler

IPC: B41J29393

CPC classification number: B41J2/16579

Abstract: 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.