公开(公告)号：US20180088702A1

公开(公告)日：2018-03-29

申请号：US15390219

申请日：2016-12-23

Applicant: Apple Inc.

Inventor： Julian Kevin SHUTZBERG ,  Adam MONKOWSKI ,  Baboo GOWREESUNKER

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0418 ,  G06F2203/04101 ,  G06F2203/04105

Abstract: Pressure compensation can be used to improve performance of force-sensitive touch screens. Changes in pressure, particularly transient, internal pressure changes in an electronic device due to an object applying force to a touch screen of the electronic device, can degrade force sensing performance of the touch screen. For example, when a finger presses a force-sensitive touch screen of a sealed electronic device, the applied force can increase internal pressure of the sealed electronic device until internal pressure can equalize. The increased internal pressure can cause a normal force to oppose the deflection of the touch screen, resulting in inaccurate force measurements of applied user force. In some examples, an electronic device including a force-sensitive touch screen can include a pressure sensor configured to measure internal pressure of the electronic device. The measured pressure can be used to compensate the amount of force measured by the force sensor.