Common electrode connections in integrated touch screens

Patent metadata

Field	Value
Publication number	US-9195331-B2
Application number	US-201113312940-A
Country	US
Kind code	B2
Filing date	Dec 6, 2011
Priority date	Dec 6, 2011
Publication date	Nov 24, 2015
Grant date	Nov 24, 2015

Abstract

Common electrodes (Vcom) of integrated touch screens can be segmented into electrically isolated Vcom portions that can be operated as drive lines and/or sense lines of a touch sensing system. The touch screen can include high-resistivity connections between Vcom portions. The resistivity of the high-resistivity connections can be high enough so that touch sensing and image display can be performed by the touch screen, and the high-resistivity connections can provide an added functionality by allowing a charge build up on one of the Vcom portions to be spread to other Vcom portions and/or discharged from system by allowing charge to leak through the high-resistivity connections. In this way, for example, visual artifacts that result from charge build up on a Vcom portion can be reduced or eliminated.

First claim

What is claimed is:

1. An integrated touch screen comprising:
a plurality of display pixels disposed in an active region of the touch screen;
a plurality of common electrodes including first common electrodes and second common electrodes, each display pixel being associated with one of the common electrodes, wherein the first common electrodes are sense common electrodes and the second common electrodes are drive common electrodes;
a plurality of first connections between the…

Assignees

• Yu Cheng-Ho
• Ge Zhibing
• Xu Ming
• Chang Shih Chang
• Apple Inc

Inventors

• Yu Cheng-Ho
• Ge Zhibing
• Xu Ming
• Chang Shih Chang

Classifications

• H10W90/753

  Electricity · mapped topic

• G06F3/044

  Physics · mapped topic

• G06F3/0412 Primary

  Physics · mapped topic

• H01L2224/48137

  Electricity · mapped topic

• G02F1/13338

  Physics · mapped topic