公开(公告)号：US20170068356A1

公开(公告)日：2017-03-09

申请号：US15356215

申请日：2016-11-18

Applicant: Apple Inc.

Inventor： Aleksandar PANCE ,  Omar S. LEUNG ,  David T. AMM

IPC: G06F3/044 ,  G06F1/16 ,  H03K17/96 ,  G06F3/041

Abstract: The present disclosure addresses methods and apparatus facilitating capacitive sensing using a conductive surface, and facilitating the sensing of proximity to the conductive surface. The sensed proximity will often be that of a user, but can be another source of a reference voltage potential. In some examples, the described systems are capable of sensing capacitance (including parasitic capacitance) in a circuit that includes the outer conductive surface, and where that outer conductive surface is at a floating electrical potential. In some systems, the systems can be switched between two operating modes, a first mode in which the system will sense proximity to the conductive surface, and a second mode in which the system will use a capacitance measurement to sense contact with the conductive surface.

Abstract translation: 本公开涉及使用导电表面促进电容感测的方法和装置，并且有助于感测靠近导电表面。 感测到的接近度通常是用户的接近度，但是可以是参考电压电位的另一个来源。 在一些示例中，所描述的系统能够感测包括外部导电表面的电路中的电容（包括寄生电容），并且其中外部导电表面处于浮置电位。 在一些系统中，系统可以在两种操作模式之间切换，其中系统将感测到与导电表面接近的第一模式，以及其中系统将使用电容测量来感测与导电表面的接触的第二模式。