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公开(公告)号：US4238804A
公开(公告)日：1980-12-09
申请号：US16256
申请日：1979-02-28
申请人： W. Thomas Warren
发明人： W. Thomas Warren
CPC分类号： B41J2/12
摘要： A pictorial ink jet printer is disclosed. The printer uses a linear array of nozzles each of which records a segment of a row of pixels in a given raster pattern. The pixel segment is recorded by electrostatically deflecting the ink drops from a nozzle to the pixels contained within the segment. The drops from adjacent nozzles are "stitched" or aligned to these ideal pixel positions by aligning the ink drop streams to drop position sensors. Two sensors are used for each nozzle. Preferably, adjacent nozzles share sensors. The sensors are spaced relative to each other to very close tolerances. Consequently, alignment of each nozzle to its two drop position sensors means that the drops from adjacent nozzles are aligned or "stitched."
摘要翻译： 公开了一种图形喷墨打印机。 打印机使用线性阵列的喷嘴，每个喷嘴在给定的光栅图案中记录一行像素的一段。 通过将墨滴从喷嘴静电偏转到包含在片段内的像素来记录像素段。 来自相邻喷嘴的液滴通过将墨滴流对准液滴位置传感器“缝合”或与这些理想像素位置对准。 每个喷嘴使用两个传感器。 优选地，相邻喷嘴共享传感器。 传感器相对于彼此间隔开非常紧密的公差。 因此，每个喷嘴对其两个液滴位置传感器的对准意味着来自相邻喷嘴的液滴对准或“缝合”。
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公开(公告)号：US4196454A
公开(公告)日：1980-04-01
申请号：US965824
申请日：1978-12-04
申请人： W. Thomas Warren
发明人： W. Thomas Warren
CPC分类号： H04N1/4055 , H04N1/4052
摘要： A system for processing halftone image data in digital format. The image data is electronically screened to provide a binary output suitable for storage or printing, the image data being processed in discrete blocks or cells. The error between actual and printed average gray values of each image cell processed is determined and the electronic screen thresholds are modified in accordance with such error (if any) prior to processing the next image cell. At the beginning of the aforesaid process and at the beginning of processing each line, the error is set at zero.
摘要翻译： 用于以数字格式处理半色调图像数据的系统。 图像数据被电子屏蔽以提供适合于存储或打印的二进制输出，图像数据在离散块或单元中被处理。 确定处理的每个图像单元的实际和打印的平均灰度值之间的误差，并且在处理下一个图像单元之前根据这种错误（如果有的话）修改电子屏幕阈值。 在上述过程的开始和处理每一行的开始处，误差被设置为零。
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公开(公告)号：US4196452A
公开(公告)日：1980-04-01
申请号：US965667
申请日：1978-12-01
申请人： W. Thomas Warren , Peter A. Crean
发明人： W. Thomas Warren , Peter A. Crean
CPC分类号： H04N1/4055
摘要： A system for processing halftone image data in digital format. The image data is electronically screened to provide a binary output suitable for storage or printing, the image data being processed in discrete blocks or cells. The error between actual and printed average gray values of each image cell processed is determined and the electronic screen thresholds are modified in accordance with such error (if any) prior to processing the next image cell. At the beginning of the aforesaid process and at the beginning of the processing each line, an error is randomly chosen.
摘要翻译： 用于以数字格式处理半色调图像数据的系统。 图像数据被电子屏蔽以提供适合于存储或打印的二进制输出，图像数据在离散块或单元中被处理。 确定处理的每个图像单元的实际和打印的平均灰度值之间的误差，并且在处理下一个图像单元之前根据这种错误（如果有的话）修改电子屏幕阈值。 在上述过程的开始和处理每一行的开始处，随机选择一个错误。
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公开(公告)号：US4196453A
公开(公告)日：1980-04-01
申请号：US965668
申请日：1978-12-01
申请人： W. Thomas Warren
发明人： W. Thomas Warren
CPC分类号： H04N1/4055
摘要： A system for screening image data provided in digital format. The image data is first electronically examined to determine whether or not the data is comprised of highlight, shadow, or midtone. Where the image data is determined to be midtone, the data is processed using a high frequency electronic screen. Where the image data is determined to be highlight or shadow, the data is processed using a low frequency electronic screen.
摘要翻译： 用于筛选以数字格式提供的图像数据的系统。 首先对图像数据进行电子检查，以确定数据是否由高亮，阴影或中间色调组成。 在图像数据被确定为中间色调的情况下，使用高频电子屏幕处理数据。 在确定图像数据为高亮或阴影的地方，使用低频电子屏幕处理数据。
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