公开(公告)号：US06616256B1

公开(公告)日：2003-09-09

申请号：US10106746

申请日：2002-03-26

申请人： William Paul Cook ,  John Glenn Edelen ,  George Keith Parish ,  Kristi Maggard Rowe ,  Susan Marie Zearfoss

发明人： William Paul Cook ,  John Glenn Edelen ,  George Keith Parish ,  Kristi Maggard Rowe ,  Susan Marie Zearfoss

IPC分类号： B41J2938

CPC分类号： B41J2/04541 ,  B41J2/04543 ,  B41J2/0458 ,  G01R31/318536

摘要： An n-bit serial shift register in an ink jet print head operates in a print mode or a test mode. When the shift register is operating in the print mode, n bits of print data are serially scanned into n number of bit registers and are then latched out to heater addressing logic circuitry in the print head to control a print operation. When the circuit is operating in the test mode, x bits of test point data from x number of test nodes in the print head are loaded in parallel into x number of the n number of bit registers, and are then serially scanned out to a test data output. In this manner, a single shift register may be used to scan in print data and scan out test data, thereby providing observability and controllability of the internal logic nodes of the print head while minimizing logic size and the number of input/output connections on the print head.

摘要翻译： 喷墨打印头中的n位串行移位寄存器在打印模式或测试模式下操作。 当移位寄存器工作在打印模式时，打印数据的n位被顺序地扫描到n个位寄存器中，然后被锁存到打印头中的加热器寻址逻辑电路以控制打印操作。 当电路在测试模式下工作时，打印头中x个测试节点的x位测试点数据并行加载到x个n个位寄存器中，然后连续扫描出一个测试 数据输出。 以这种方式，可以使用单个移位寄存器来扫描打印数据并扫描测试数据，从而提供打印头的内部逻辑节点的可观察性和可控性，同时使逻辑大小和输入/输出连接数量最小化 打印头。

公开(公告)号：US06588872B2

公开(公告)日：2003-07-08

申请号：US09827805

申请日：2001-04-06

申请人： Frank Edward Anderson ,  William Paul Cook ,  George Keith Parish ,  Susan Marie Zearfoss

发明人： Frank Edward Anderson ,  William Paul Cook ,  George Keith Parish ,  Susan Marie Zearfoss

IPC分类号： B41J207

CPC分类号： B41J2/04505 ,  B41J2/04573 ,  B41J2/0458 ,  B41J2202/17

摘要： A system is described for compensating for misalignments in an ink jet printer having an ink jet print head cartridge that includes a heater chip. The system includes determining alignment adjustment information related to the misalignments in the ink jet printer, loading the alignment adjustment information into a volatile memory device on the heater chip, and accessing the alignment adjustment information from the volatile memory device. The system also includes generating nozzle control signals based at least in part on the alignment adjustment information. The nozzle control signals are selectively provided to resistive heating elements in the heater chip, thereby heating ink in ink chambers adjacent the heating elements and ejecting ink droplets toward a print medium. The timing of the nozzle control signals is adjusted based upon the amount of misalignment in the various components of the printer and print head. The timing adjustments are applied to groups of nozzles so that dots printed by one group are substantially vertically aligned with dots printed by another group, thereby reducing the amount of perceptible skew in the printed output.