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    • 8. 发明授权
    • Dynamic pass buffer sizing
    • 动态通过缓冲区大小
    • US06247786B1
    • 2001-06-19
    • US09427225
    • 1999-10-26
    • James Ronald BoothMartin Geoffrey Rivers
    • James Ronald BoothMartin Geoffrey Rivers
    • B41J215
    • G06K15/10B41J2/15G06K2215/0077
    • Data describing an image to be printed on a print medium is transferred to an ink jet print head. The print head has n number of nozzles in a vertical array for sequentially ejecting vertical columns of ink droplets onto the print medium as the print head scans horizontally across the print medium. The vertical columns of ink droplets ejected during a single pass of the print head collectively comprise a swath of the image. As the data is received from a data source, a required memory space is determined which would accommodate a portion of the data describing a swath of the image to be printed using all n of the nozzles. A current available capacity of a memory device is determined and the amount of image data received from the host is determined. A portion of the data that describes a swath of the image to be printed using a number m of the nozzles is transferred to the memory device. The number m depends on the minimum of the ratio of current available capacity of the memory device to the required memory space needed to accommodate data required to print a swath using all n of the nozzles and the ratio of the image data received from the host to the amount of image data required to print a swath using all n of the nozzles. The portion of the data that describes the swath of the image to be printed using the m number of the nozzles is transferred from the memory device to the print head. The swath of the image is then printed on the print medium using the m number of the nozzles.
    • 描述要打印在打印介质上的图像的数据被传送到喷墨打印头。 打印头具有垂直阵列中的n个喷嘴,用于当打印头横穿打印介质水平扫描时,将垂直列的墨滴依次喷射到打印介质上。 在打印头的单次通过期间喷射的墨滴的垂直列共同地包括图像的条带。 当从数据源接收数据时,确定所需的存储器空间,其将使用所有n个喷嘴容纳描述要打印的图像的一行的数据的一部分。 确定存储器设备的当前可用容量并且确定从主机接收的图像数据量。 使用m个喷嘴描述要打印的图像的一行的数据的一部分被传送到存储器件。 数字m取决于存储器件的当前可用容量与使用所有n个喷嘴打印条带所需的数据所需的存储空间的比率以及从主机接收的图像数据的比率的最小值 使用所有n个喷嘴打印条纹所需的图像数据量。 使用m个喷嘴描述要打印的图像的条带的数据的部分从存储装置传送到打印头。 然后使用m个喷嘴将图像的条纹印刷在打印介质上。