TOUCHSCREEN SYSTEM HAVING ON-PANEL TOUCH DRIVER CIRCUITRY

摘要

A touchscreen system has a light transparent panel, a region of display elements below the panel, and a transparent conductor plate that overlays the region of display elements. The transparent conductor plate is made of a number of electrode segments. Touch driver circuits are positioned on the panel and in a border region thereof. Each touch driver circuit has a respective latch and a respective output stage. The output stage is coupled to a respective one of the electrode segments and has a signal input to receive a touch stimulus signal. The touch driver circuits may be operated in shift register fashion so that the touch stimulus signal is pulsed sequentially to the electrode segments. Other embodiments are also described and claimed.

主权项

1. A touchscreen system comprising:
a light transparent panel; a region of display elements formed on the panel; a transparent conductor plate that overlays the region of display elements and is made of a plurality of first electrode segments, wherein the transparent conductor plate is electrically coupled to the display elements; and a plurality of touch driver circuits positioned on the panel and in a border region thereof, wherein each touch driver circuit has a respective latch and a respective output stage, the latch having a) a clock input and b) an output that is coupled to a control input of the output stage, wherein the output stage is coupled to a respective one of the plurality of first electrode segments and has a signal input to receive a touch stimulus signal.