公开(公告)号：EP0661870A1

公开(公告)日：1995-07-05

申请号：EP95300007.2

申请日：1995-01-03

申请人： XEROX CORPORATION

发明人： Dudek, Lesley P. ,  Dewar, Vaughan L.

IPC分类号： H04N1/50

CPC分类号： H04N1/502 ,  B41J2/2132 ,  B41J19/142

摘要： An apparatus (10) and method for liquid ink recording of color images (Figs. 3-5) uses a black ink with color inks and a heated platen (30) to reduce intercolor bleed and produce uniform solids with sharply defined edges. Each scan line of an image is deposited on a print medium in a plurality of passes by a color printhead (26) and a black printhead (27) on a carriage (12). Each separate pass of the printheads (26,27) deposits a fraction of a total number of black ink spots in a partial tone pattern and all of the ink spots of one of the colors, such as cyan, magenta or yellow.

摘要翻译： 对于彩色图像的墨液的记录（图3-5）的装置（10）和方法使用与彩色油墨和一个加热压板（30），以减少色间渗色和产生具有清晰限定的边缘均匀固体的黑色油墨。 图像的每个扫描线被沉积由彩色印刷头（26）和黑色印刷头（27）上的滑架（12）在遍的多个打印介质上。 如青色，品红色或黄色：所述打印头（26,27）沉积黑色墨水点在部分音调模式的总数的一小部分并且所有颜色中的一个的墨斑，颜色的每个单独的过程。

公开(公告)号：EP0738068A3

公开(公告)日：1998-04-01

申请号：EP96302404.7

申请日：1996-04-03

申请人： XEROX CORPORATION

发明人： Torpey, Peter A. ,  Dewar, Vaughan L.

IPC分类号： H04N1/034 ,  H04N1/191 ,  H04N1/40

CPC分类号： H04N1/1911 ,  G06K15/107 ,  G06K2215/111

摘要： Random printing techniques for liquid ink printers include forming masks in a random mask buffer (70) having randomly generated ON values which are ANDed by an AND circuit (74) with the information to be printed in a swath buffer (64). The randomness of the masks improves printing quality and reduces printhead signature problems resulting from printhead defects including misdirected or inoperative nozzles or jets. Masks wherein the ON values are generated with a 50% probability require two masks to print each and pixel location. Masks having the ON values generated with a 25% probability require four masks. Partial advance of the recording medium for overlapping adjacent swaths of scanning carriage type printer is possible to further improve printing by reducing printhead signature defects and "banding".

公开(公告)号：EP0738068A2

公开(公告)日：1996-10-16

申请号：EP96302404.7

申请日：1996-04-03

申请人： XEROX CORPORATION

发明人： Torpey, Peter A. ,  Dewar, Vaughan L.

IPC分类号： H04N1/034 ,  H04N1/191 ,  H04N1/40

CPC分类号： H04N1/1911 ,  G06K15/107 ,  G06K2215/111

摘要： Random printing techniques for liquid ink printers include forming masks in a random mask buffer (70) having randomly generated ON values which are ANDed by an AND circuit (74) with the information to be printed in a swath buffer (64). The randomness of the masks improves printing quality and reduces printhead signature problems resulting from printhead defects including misdirected or inoperative nozzles or jets. Masks wherein the ON values are generated with a 50% probability require two masks to print each and pixel location. Masks having the ON values generated with a 25% probability require four masks. Partial advance of the recording medium for overlapping adjacent swaths of scanning carriage type printer is possible to further improve printing by reducing printhead signature defects and "banding".

摘要翻译： 用于液体墨水打印机的随机打印技术包括在具有随机产生的ON值的随机掩码缓冲器（70）中形成掩模，所述ON值由AND电路（74）与待扫描的信息在扫描缓冲器（64）中进行AND操作。 掩模的随机性提高了打印质量，并减少了打印头缺陷（包括误导或不起作用的喷嘴或喷嘴）造成的打印头签名问题。 其中ON值以50％的概率产生的掩模需要两个掩模来打印每个和像素位置。 具有以25％概率生成的ON值的掩模需要四个掩模。 用于重叠相邻的扫描台式打印机的条带的记录介质的部分推进可以通过减少打印头签名缺陷和“捆扎”来进一步改进打印。