公开(公告)号：US5084666A

公开(公告)日：1992-01-28

申请号：US602023

申请日：1990-10-23

申请人： John P. Bolash

发明人： John P. Bolash

IPC分类号： G05F1/563 ,  H02M3/156

CPC分类号： H02M3/156 ,  G05F1/563

摘要： A voltage converter having switchable output capability is provided. The voltage converter converts an unregulated voltage input to a regulated DC voltage output. The regulated DC output level is selectable by changing the logical status of at least one logic input to the voltage converter, thereby converting a single voltage source to one of at least two selectable DC voltage outputs.

公开(公告)号：US4788484A

公开(公告)日：1988-11-29

申请号：US89688

申请日：1987-08-26

申请人： John P. Bolash ,  Joel G. Goodwin ,  Nicholas J. Krull

发明人： John P. Bolash ,  Joel G. Goodwin ,  Nicholas J. Krull

IPC分类号： H02P8/14 ,  H02P8/10 ,  H02P8/16 ,  H02P8/36 ,  H02P8/00

CPC分类号： H02P8/36 ,  H02P8/165

摘要： The invention is for an improved method and apparatus of driving a stepper motor with multiple voltages. A first voltage is applied to the step motor winding for a driving phase, and a second higher voltage is applied to the same motor winding during the same driving phase just prior to and substantially until the time that the winding is de-energized.

公开(公告)号：US5349375A

公开(公告)日：1994-09-20

申请号：US870449

申请日：1992-04-16

申请人： John P. Bolash ,  Edmund H. James, III ,  Randall D. Mayo ,  Richard G. Zumbach

发明人： John P. Bolash ,  Edmund H. James, III ,  Randall D. Mayo ,  Richard G. Zumbach

IPC分类号： B41J2/13 ,  B41J2/505 ,  B41J2/51 ,  B41J11/42 ,  B41J2/07

CPC分类号： B41J2/5056 ,  B41J11/42

摘要： In a printer having P+X printing elements for printing pixels with a vertical center-to-center spacing R.sub.1 during a plurality of line scans, and a stepper motor for moving a record medium in increments R.sub.2 where R.sub.2 is greater than R.sub.1, all points addressable printing is obtained by a combination of movement of the record medium orthogonal to the line scan direction and shifting address signals applied to the print elements. The stepper motor moves the record medium a distance k.sub.2 R.sub.2 between successive line scans and address signals are applied to (n+k.sub.1)th . . . (n+k.sub.1 +P-1)th print elements to cause a shift k.sub.1 R.sub.1 such that the sum of the distance the record medium is moved before a line scan and the shift caused by the address signals during a scan is equal to PR.sub.1 where P is the number of print elements active during the preceding line scan, or equal to any desired integral multiple of R.sub.1 in other print modes. With a print head capable of printing pixels on 1/300 inch centers, and a stepper motor capable of moving the record medium in minimum increments of 1/150 inch, all points addressable printing with a pixel resolution of 1/300 inch is achieved with increased accuracy. This same arrangement also permits printing in the character mode with a line-to-line spacing of exactly 1/6 inch. In a second embodiment the line-to-line spacing differs from 1/2 inch by a distance that has minimal impact on print quality.

摘要翻译： 在具有P + X打印元件的打印机中，用于在多行扫描期间打印具有垂直中心到中心间距R1的像素，以及用于以R2为大于R1的增量R2移动记录介质的步进电机，所有点 通过与行扫描方向正交的记录介质的移动和施加到打印元件的移位地址信号的组合来获得可寻址打印。 步进电机使记录介质在连续行扫描之间移动距离k2R2，将地址信号施加到（n + k1）。 。 。 （n + k1 + P-1）个打印元件，使得在行扫描之前移动记录介质的距离和在扫描期间由地址信号引起的移位之和的移位k1R1等于PR1，其中P 是在前一行扫描期间激活的打印元素的数量，或等于其他打印模式中R1的任何所需的整数倍。 使用能够在1/300英寸中心上打印像素的打印头，以及能够以1/150英寸的最小增量移动记录介质的步进电机，所有点可通过1/300英寸的像素分辨率进行可寻址打印，实现了 增加准确度。 同样的布置还允许以字符模式打印，线间距精确为1/6英寸。 在第二实施例中，线间距离不同于1/2英寸乘以对打印质量影响最小的距离。

公开(公告)号：US5480240A

公开(公告)日：1996-01-02

申请号：US161006

申请日：1993-12-01

申请人： John P. Bolash ,  Curt P. Breswick ,  Thomas J. Eade ,  David K. Lane ,  Randall D. Mayo ,  David S. Waldrop

发明人： John P. Bolash ,  Curt P. Breswick ,  Thomas J. Eade ,  David K. Lane ,  Randall D. Mayo ,  David S. Waldrop

IPC分类号： B41J2/36 ,  G06K15/10 ,  B41J2/22

CPC分类号： B41J2/3555 ,  B41J2/36 ,  G06K15/102 ,  G06K2215/0071 ,  G06K2215/0077

摘要： A print quality enhancement arrangement for a dot matrix printer such as a thermal ink jet printer. The arrangement includes a buffer for receiving 300 dots per inch (dpi) resolution data in the horizontal (print head movement) direction and creates 600 dpi resolution data using image enhancement techniques. The arrangement further includes correction of the higher resolution data to remove pels which are unprintable due to the frequency response of the print elements in the print head. The correction is performed using knowledge of the history of printed pels and the original 300 dpi data. The creation of the higher resolution data and its correction occur "on-the-fly" as data is being fed to the print head, rather than through the creation of a 300 by 600 dpi bitmap.

摘要翻译： 用于诸如热喷墨打印机的点阵打印机的打印质量增强布置。 该装置包括用于在水平（打印头移动）方向上接收每英寸300点（dpi）分辨率数据的缓冲器，并使用图像增强技术创建600dpi分辨率数据。 该装置还包括校正较高分辨率的数据以去除由于打印头中的打印元件的频率响应而不能打印的像素。 使用关于印刷图像的历史和原始300dpi数据的知识来执行校正。 随着数据被馈送到打印头，而不是通过创建300×600dpi的位图，“更快的分辨率”数据的创建及其校正发生在“即时”。