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2. 发明授权

US06254217B1 Apparatus and method for hue shift compensation in a bidirectional printer 有权
标题翻译：双向打印机色调偏移补偿的装置和方法
公开(公告)号：US06254217B1
公开(公告)日：2001-07-03
申请号：US09363943
申请日：1999-07-29
申请人： Ronald A Askeland , Ronald J. Burns , William S Osborne
发明人： Ronald A Askeland , Ronald J. Burns , William S Osborne
IPC分类号： B41J221
CPC分类号： B41J2/2132 , B41J19/147 , G06K15/107 , G06K2215/0094
摘要： An printing apparatus and method for reducing hue shift due to differing deposition orders of different color ink drops. A differing deposition order occurs in bidirectional inkjet printers with printheads that deposit overlapping drops in a single scan in either a forward or rearward direction. Different print masks for each color ink are used to govern ink drop deposition in the different scan directions in order to vary the deposition order and/or number of drops deposited in a given location. A different mask pattern is applied to a top and bottom set of nozzles corresponding to the print advance height. This technique reduces the perceived difference in color shade between an area of a composite color printed in the forward direction followed by the rearward direction, and an area of the same composite color printed in the rearward direction followed by the forward direction. An inkjet printer constructed in accordance with the present invention minimizes hue shift while still retaining the advantages of multipass bidirectional printing, without the need to reduce throughput or increase the manufacturing cost or complexity of the printer.
摘要翻译：一种用于减少由于不同颜色墨滴的不同沉积次序导致的色相偏移的打印装置和方法。在双向喷墨打印机中发生不同的沉积顺序，其中打印头在向前或向后的方向上在单次扫描中沉积重叠的液滴。为了改变在给定位置上沉积的液滴的沉积次序和/或数量，使用每个彩色油墨的不同打印掩模来控制不同扫描方向上的墨滴沉积。将不同的掩模图案应用于对应于打印提前高度的顶部和底部喷嘴组。该技术减少了在向前方向印刷的复合颜色的区域之后和随后方向上印刷的复合颜色的区域之间的颜色差异和沿向后方向印刷的相同复合颜色的区域的感觉差异。根据本发明构造的喷墨打印机将色调偏移最小化，同时仍保留多次双向打印的优点，而不需要降低打印机的生产量或增加制造成本或复杂性。

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