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    • 2. 发明授权
    • High-resolution inkjet printing using color drop placement on every pixel row during a single pass
    • 在单次通过期间,在每个像素行上使用色滴放置的高分辨率喷墨打印
    • US06367908B1
    • 2002-04-09
    • US08811788
    • 1997-03-04
    • Josep Maria SerraNathan M. Moroney
    • Josep Maria SerraNathan M. Moroney
    • B41J2300
    • B41J2/2103B41J2/15
    • An inkjet printing system uses high-resolution printheads holding different color inks to produce true 600 dpi color printing with a single pass of the printheads. By achieving a smaller drop size in the range of 25-50 picoliters for each printhead having a separate ink color (yellow, cyan, magenta, black), a full range of high-resolution color print-quality modes is possible. In an exemplary embodiment with a carriage scan speed of 25 ips, a two-pass draft mode uses a 7.5 kHz firing frequency, a four-pass normal mode uses a 4 kHz firing frequency, and an eight-pass best mode uses a 2 kHz firing frequency. In all of these print modes, each printhead can provide color inkdrop placement on every pixel row during a single pass.
    • 喷墨打印系统使用保持不同颜色墨水的高分辨率打印头,通过单次打印头产生真正的600 dpi彩色打印。 通过在具有单独墨水颜色(黄色,青色,品红色,黑​​色)的每个打印头的25-50皮升范围内实现更小的墨滴尺寸,可以进行全范围的高分辨率彩色打印质量模式。 在具有25 ips的滑架扫描速度的示例性实施例中,两路通气模式使用7.5kHz的发射频率,四通正常模式使用4kHz的发射频率,并且八通最佳模式使用2kHz 发射频率。 在所有这些打印模式中,每个打印头可以在单次通过期间在每个像素行上提供彩色墨滴放置。
    • 3. 发明授权
    • Bidirectional color printmodes with semistaggered swaths to minimize hue shift and other artifacts
    • 双向彩色印刷图案,具有半分隔的条纹,以最小化色调偏移和其他工件
    • US06250739B1
    • 2001-06-26
    • US08810747
    • 1997-03-04
    • Josep Maria Serra
    • Josep Maria Serra
    • B41J221
    • G06K15/105B41J2/2132B41J19/14G06K2215/0094H04N1/502
    • Bidirectional scanning printheads discharge color-ink drops at ultrahigh resolution while scanning in each direction, to form color swaths on a print medium. The heads are at least partially aligned with respect to the longitudinal axis of the medium, so that the swaths at least partly overlap in that direction. An advance mechanism intermittently steps the print medium longitudinally, to enable displacement of successive swaths. A control system alternates (1) one full reciprocation of the heads, to discharge drops while scanning each way across the medium, with (2) each step of the advance mechanism. Preferably the heads print, while scanning each way, a respective generally fixed nonzero fraction of the total amount of each secondary color to be printed. In this way the overall appearance of each secondary is essentially consistent and partway between two appearances respectively produced by scanning two ways. This invention avoids the long-printzone drawbacks associated with full-height-staggered heads. Preferably the fractions for all the swaths are about equal, so that the consistent appearance for each secondary is essentially the average of two appearances respectively produced by scanning two ways. Various printmasks complete each swath in eight passes with four print-medium advances, or four passes and two advances, or two and one—in each case printing in every pass.
    • 双向扫描打印头在每个方向扫描时以超高分辨率排出彩色墨滴,以在打印介质上形成彩色条纹。 头相对于介质的纵向轴线至少部分对准,使得条在该方向上至少部分重叠。 前进机构间歇地纵向地移动打印介质,以使连续的条带移位。 控制系统交替(1)头部的一个完整的往复运动,以扫描每个方式穿过介质排出液滴,(2)前进机构的每个步骤。 优选地,在每次扫描时,打印头打印要打印的每个次要颜色的总量的相应的大致固定的非零分数。 以这种方式,每个次要的整体外观基本上是一致的,并且通过扫描两种方式分别产生的两个外观之间是一致的。 本发明避免了与全高交错磁头相关联的长打印区缺点。 优选地,所有条带的部分大致相等,使得每个次要部分的一致外观基本上是通过扫描两种方式分别产生的两次外观的平均值。 各种打印掩模以八次通过完成每个条带,四个打印介质前进,四遍和两个前进,或两次和一次,每次通过打印。
    • 4. 发明授权
    • Multipass color printmasks based on location rules to minimize hue
shift, banding and coalescence
    • 基于位置规则的多点彩色印刷掩模,以最小化色调偏移,条带和聚结
    • US6067405A
    • 2000-05-23
    • US810753
    • 1997-03-04
    • Josep Maria Serra
    • Josep Maria Serra
    • B41J2/205B41J2/07B41J2/21B41J19/14G06K15/10B41B15/00B41J2/145B41J29/38H04N1/46
    • G06K15/107B41J2/2132B41J19/142G06K2215/0097
    • Scanning printheads form a color image as inkdrops in a pixel grid on a print medium. Pixel row spacing equals nozzle pitch. Apparatus holds and provides (or creates in real time) a printmask using location rules that prevent addressing, within each scan, immediately neighboring pixels in any horizontal, vertical or diagonal direction. The mask is applied to control the heads. In other aspects of the invention, the rules also prevent addressing, in each scan, horizontally neighboring pixels within the entire width of the mask; or vertically neighboring pixels within its entire height; or immediate neighbors in any direction across a boundary--horizontal, vertical, or either--between abutting masks. Specific masks are set forth implementing these aspects. Another form of the invention yields a two-pass mask with this pass-number pattern: ##EQU1## Another form is a mask-creating-and-using method: generate a number series to define rows/columns of a pixel grid for printing in successive head passes, test the numbers against rules to minimize ink coalescence, and accumulate the numbers as an array to define a pixel grid--all automatically. Also check performance of arrays so generated, select a preferred one, and store it in a tangible medium for later automatic recall to control a printer.
    • 扫描打印头在打印介质上的像素网格中形成彩色图像作为墨滴。 像素行间距等于喷嘴间距。 装置使用位置规则保持并提供(或实时地创建)打印掩码,该规则防止在每次扫描内在任何水平,垂直或对角线方向上紧邻相邻像素的寻址。 应用面罩来控制头部。 在本发明的其他方面,规则还防止在每个扫描中寻址在掩模的整个宽度内的水平相邻像素; 或垂直相邻的像素; 或直接相邻的任何方向跨越边界 - 水平,垂直或相邻的掩模之间。 阐述了实施这些方面的特定掩模。 本发明的另一种形式产生具有这种通数模式的双通道掩模:另一种形式是掩模创造和使用方法:产生数字系列以定义像素网格的行/列以便在连续的头部通行 ,根据规则测试数字以最小化墨合并,并将数字累加为数组以定义像素网格 - 全部自动。 还要检查如此生成的阵列的性能,选择一个首选的阵列,并将其存储在有形介质中,以供以后自动调用以控制打印机。
    • 10. 发明授权
    • Fast building of masks for use in incremental printing
    • 快速构建面罩,用于增量打印
    • US06542258B1
    • 2003-04-01
    • US09150322
    • 1998-09-09
    • Joan Manel GarciaMatt BonnerMark HickmanJosep Maria Serra
    • Joan Manel GarciaMatt BonnerMark HickmanJosep Maria Serra
    • G06K1500
    • G06K15/107
    • A program with complete conditions for a usable mask yields a unitary mask, each try. One mask pattern is used throughout an image, but may be “tiled”. Preferably the program, for given mask position, expresses favorability of several candidate pass numbers as a “neighborhood constraint” in the form of a weight; distills the weights into one weight for each pass number; based on that, chooses a number for the position; and iterates for all positions. Many preferences are very useful, e.g. automatically balancing randomness vs. determinism, and several generalized relative notations. Another invention facet uses an input text file of mask constraints; a program reads constraints from the file, applies them, forms a mask and stores/uses it. Another reprocesses a mask for best image quality, fixing its own imperfections of first-round mask forming.
    • 具有完整条件的程序可用的掩模产生一个单一的面具,每个尝试。 在整个图像中使用一个掩模图案,但可以“平铺”。 优选地,对于给定的掩模位置,程序表示几种候选通过数的有利性,作为权重形式的“邻域约束”; 将每个通行证数量的重量分配给一个重量; 基于此,选择一个数字的位置; 并迭代所有职位。 许多偏好是非常有用的,例如 自动平衡随机性与决定论,以及几种广义相对符号。 另一个发明方面使用掩码约束的输入文本文件; 一个程序从文件读取约束,应用它们,形成一个掩码并存储/使用它。 另一个重新处理一个面具,以获得最佳的图像质量,固定自己的第一轮面具成型的缺陷。