公开(公告)号：US20230359305A1

公开(公告)日：2023-11-09

申请号：US18312889

申请日：2023-05-05

Applicant: Apple Inc.

Inventor： Sagar R. VAZE ,  Yu-Heng CHENG ,  Prathit BUGNAIT ,  Isaac W. CHAN

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/0418 ,  G06F3/0412 ,  G06F3/0446 ,  G06F2203/04107 ,  G06F2203/04112

Abstract: Differential driving and/or sensing can reduce noise in a touch screen. In some examples, the touch electrodes and/or routing traces can be implemented using metal mesh in first and second metal layers. To mitigate electrical interference at the touch screen from a display, a display-noise shield or sensor can be provided between the display and the touch screen. In some examples, a shield can minimize a noise contribution from the display to signals generated at the touch screen. In other examples, a sensor can enable a differential read out of signals at the touch screen that subtracts a noise component measured by the sensor. Forming the shield or sensor, and the touch screen over the display using an on-cell process can improve touch screen performance and yield. The shield can be connected to a conductive ring and flex circuit via tapping points in a stackup separate from a display stackup.