公开(公告)号：US5502468A

公开(公告)日：1996-03-26

申请号：US997003

申请日：1992-12-28

申请人： David L. Knierim

发明人： David L. Knierim

IPC分类号： B41J2/21 ,  B41J2/01 ,  B41J2/015 ,  B41J2/045 ,  B41J2/12 ,  B41J2/125 ,  B41J2/505 ,  B41J29/393

CPC分类号： B41J2/04506 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/125 ,  B41J29/393

摘要： A method of normalizing performance of an image forming marking element, the method comprising the steps of operating the marking element with an adjustable operating parameter set to a first test value and quantifying a first value of a quantifiable performance characteristic of the marking element, operating the marking element with the operating parameter set to a second test value and quantifying a second value of the quantifiable performance characteristic, calculating an optimum value of the operating parameter, and adjusting the operating parameter to its calculated optimum value.

摘要翻译： 一种使图像形成标记元件的性能正常化的方法，所述方法包括以下步骤：使用设置为第一测试值的可调节操作参数来操作所述标记元件，并且对所述标记元件的可量化性能特征的第一值进行量化， 将操作参数设置为第二测试值并量化可量化性能特征的第二值，计算操作参数的最佳值，并将操作参数调整为其计算的最佳值。

公开(公告)号：US5296792A

公开(公告)日：1994-03-22

申请号：US6296

申请日：1993-01-19

申请人： David L. Knierim

发明人： David L. Knierim

IPC分类号： H02P7/29 ,  H02P7/00 ,  H02P8/12

CPC分类号： H02P7/04

摘要： A bidirectional chopper transconductance amplifier for driving a motor winding provides a duty cycle signal as an input to an H bridge circuit that provides a voltage output across the motor winding. The amplifier also provides a direction input that determines the polarity of the voltage output across the motor winding. An RS flip-flop is set by the pulses of a cyclical chopper sync input signal and is reset as a function of the current in the motor winding and a command current input to produce the duty cycle signal. A first pair of flip-flops, one clocked by the trailing edges of the chopper sync input signal pulses and the other clocked by the trailing edges of the chopper sync input signal pulses delayed by a specified time, detects whether the RS flip-flop is reset prior to pulse trailing edge of the current cycle and prior to the specified time of the prior cycle. A second pair of flip-flops, clocked by the trailing edges of the delayed chopper sync input signal pulses, together with an XOR gate detect whether the direction input was reversed between the prior and current cycles. Logic circuitry combines the outputs of the first pair of flip-flops with the output of the XOR gate and the status of the RS flip-flop to generate a toggle function to reverse the direction input.

摘要翻译： 用于驱动电动机绕组的双向斩波器跨导放大器提供占空比信号作为H桥电路的输入，其提供跨过电动机绕组的电压输出。 放大器还提供了一个方向输入，用于确定电机绕组上的电压输出的极性。 RS触发器由周期性斩波同步输入信号的脉冲设置，并且根据电动机绕组中的电流和输入的指令电流被复位以产生占空比信号。 第一对触发器，一个由斩波同步输入信号脉冲的后沿计时的触发器，另一个触发器由延迟了指定时间的斩波同步输入信号脉冲的后沿计时，检测RS触发器是否为 在当前周期的脉冲后沿之前和先前周期的指定时间之前复位。 由延迟斩波同步输入信号脉冲的后沿计时的第二对触发器与XOR门一起检测方向输入是否在先前和当前周期之间相反。 逻辑电路将第一对触发器的输出与异或门的输出和RS触发器的状态相结合，以产生反转方向输入的触发功能。

公开(公告)号：US4586037A

公开(公告)日：1986-04-29

申请号：US472463

申请日：1983-03-07

申请人： Harvey J. Rosener ,  David L. Knierim ,  John C. Dalrymple

发明人： Harvey J. Rosener ,  David L. Knierim ,  John C. Dalrymple

IPC分类号： G06F3/153 ,  G06K15/02 ,  G06T11/20 ,  G09G5/02 ,  G09G5/20 ,  G09G1/06

CPC分类号： G09G5/20 ,  G06K15/02 ,  G09G5/026 ,  G06K2215/0042 ,  G06K2215/006 ,  G06K2215/0094

摘要： A high speed arrangement for generating smooth lines of consistent thickness regardless of slope in a raster type display system such as a computer graphics system. A digital differential analyzer is employed for determining Y-position information to n bits of fraction for each integral step in X within a single operative clock cycle. All pixel positions are identified that are relevantly proximate to the starting end point of the line, to the concluding end point, and each one-dimensional array of at least three contiguous pixel positions encompassing a cross-section of the interior portion of the line. Intensity values are determined for each such identified pixel position based upon its distance from the true line, with the intensities of the pixel positions identified in each array being additionally determined based upon the slope of the line. For crossing-line situations in color systems, proportional weighting apparatus is provided which generates a new pixel-position value based upon the existing intensity value, the desired color of the line and the intensity value associated to the crossing line, with the latter constituting a proportionality constant.

摘要翻译： 高速布置，用于在诸如计算机图形系统的光栅型显示系统中产生无论斜率如何的均匀厚度的平滑线。 在单个操作时钟周期内，采用数字差分分析器来确定X中每个积分步长的n位分数的Y位置信息。 识别出与线的起始终点相关的所有像素位置，到结束点，以及包围该线内部横截面的至少三个相邻像素位置的每个一维阵列。 基于其与真实线的距离，针对每个这样识别的像素位置确定强度值，其中基于线的斜率另外确定在每个阵列中识别的像素位置的强度。 对于颜色系统中的交叉线情况，提供了比例加权装置，其基于现有的强度值，所需的线的颜色和与交叉线相关联的强度值产生新的像素位置值，后者构成一个 比例常数