公开(公告)号：US20170075469A1

公开(公告)日：2017-03-16

申请号：US14852847

申请日：2015-09-14

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Praveesh Chandran ,  Gee Heng Loh ,  Ravi Bhatia ,  Ys On

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/044 ,  G06F2203/04108

Abstract: Disclosed is a touch sensor and method for detecting a touch in a capacitive touchscreen application, wherein the touch sensor is capable of distinguishing between a finger hovering above the touch sensor and a touch from a stylus having a small contact surface area without having to adjust the sensitivity of the touch sensor. The touch sensor includes a first sensing electrode, a transmit electrode, and a second sensing electrode, wherein the second sensing electrode is positioned substantially around the perimeter of the inner circuitry (i.e., transmit electrode and first sensing electrode). A touch is detected by sensing changes in a first capacitance between the transmit electrode and first sensing electrode and a second capacitance between the transmit electrode and second sensing electrode. The changes in the first and second capacitances are compared to determine whether the changes in the capacitances are due to a finger hover or a touch.

Abstract translation: 公开了用于检测电容式触摸屏应用中的触摸的触摸传感器和方法，其中触摸传感器能够区分在触摸传感器上方悬停的手指和具有小接触表面积的触针的触摸，而不必调整 触摸传感器的灵敏度。 触摸传感器包括第一感测电极，发射电极和第二感测电极，其中第二感测电极基本上围绕内部电路（即发射电极和第一感测电极）的周边定位。 通过感测发射电极和第一感测电极之间的第一电容的变化以及发射电极和第二感测电极之间的第二电容来检测触摸。 比较第一和第二电容的变化，以确定电容的变化是由于手指悬停还是触摸。