公开(公告)号：US06900793B2

公开(公告)日：2005-05-31

申请号：US10261477

申请日：2002-09-30

申请人： Chun B. Goh ,  Steven N. Bathiche ,  Gary M. Rensberger ,  Nathan C. Serman

发明人： Chun B. Goh ,  Steven N. Bathiche ,  Gary M. Rensberger ,  Nathan C. Serman

IPC分类号： G06F3/038 ,  G01D5/244 ,  G06F3/033 ,  G09G5/08

CPC分类号： G01D5/24404 ,  G06F3/0312 ,  G06F3/0362

摘要： A method and system for determining the position of a movable member in an electronic input device within a predefined resolution. Two offset signals indicate the position of the movable member. The time required for each signal to cross a threshold level is measured and inverted, revealing an offset sinusoidal relationship. The offset sinusoids may be plotted against each other to reveal an approximate circle of inverse time samples for a cycle. Corresponding inverted minimum and maximum times are used to determine a center reference value for each signal. As a function of the inverted times, a quadrant of the circle is determined. Within a quadrant, a sector most closely corresponding to the position of the movable member is determined from among a plurality of predefined sectors that define the resolution. A number of sectors between position samples of the movable member are accumulated and communicated to a host device.

摘要翻译： 一种用于在预定分辨率内确定电子输入装置中的可移动部件的位置的方法和系统。 两个偏移信号表示可动件的位置。 每个信号跨越阈值电平所需的时间被测量和反转，显示出偏移正弦关系。 偏移正弦曲线可以相互绘制，以显示一个周期的反时限样本的近似圆。 相应的反相最小和最大倍数用于确定每个信号的中心参考值。 作为倒置时间的函数，确定圆的象限。 在象限内，从定义分辨率的多个预定扇区中确定最接近于可动构件的位置的扇区。 可动构件的位置样本之间的多个扇区被累积并传送到主机设备。