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1. 发明授权

US09369127B1 Method and apparatus for generating piezoelectric transducer excitation waveforms using a boost converter 有权
标题翻译：使用升压转换器产生压电换能器激励波形的方法和装置
公开(公告)号：US09369127B1
公开(公告)日：2016-06-14
申请号：US14481562
申请日：2014-09-09
申请人： Maxim Integrated Products, Inc.
发明人： Paul Nickson , Arshad Suhail Farooqui , Lee Coleman , Muhammad Umair , Roberto Alini
IPC分类号： G06F3/00 , H03K17/96 , H02M3/335 , G06F3/01
CPC分类号： H03K17/964 , G06F3/016 , G06F3/041 , H02M3/33507
摘要： Transducers formed as part of a touchscreen system emulate the motion of a pushbutton or other mechanical elements. A touchscreen system positions a transducer adjacent to an icon displayed on the touchscreen surface. When a user touches the icon, the transducer senses the touch and is then deformed in a pattern that emulates a mechanical motion, giving the user the sensation of touching a mechanical button. An excitation signal applied to the transducer is compared to a target excitation signal that, when applied to the transducer, causes the transducer to emulate the desired motion. When any differences between the two signals are detected, the excitation signal is adjusted so that the motion is corrected. The target excitation signal, or time and voltage segments defining it, are stored in memory and retrieved for comparison. The excitation signal is also selected to reduce any acoustic artifacts that can cause the transducer to generate audible clicks.
摘要翻译：作为触摸屏系统的一部分形成的传感器模拟按钮或其他机械元件的运动。触摸屏系统将传感器定位在触摸屏表面上显示的图标附近。当用户触摸图标时，换能器感测触摸，然后以模拟机械运动的图案变形，给予用户触摸机械按钮的感觉。将施加到换能器的激励信号与目标激励信号进行比较，当施加到换能器时，其使得换能器模拟期望的运动。当检测到两个信号之间的任何差异时，调整激励信号以使运动被校正。目标激励信号或定义它的时间和电压段被存储在存储器中并且被检索用于比较。还选择激励信号以减少可能导致换能器产生可听见的咔嗒声的任何声学伪影。

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