Electronic device including touch-sensitive display and method of detecting touches

摘要

A touch-sensitive display includes first electrodes and second electrodes coupled to a first controller to detect touches by self-capacitance touch sensing. The touch-sensitive display also includes third electrodes coupled to a second controller to detect touches by mutual-capacitance touch sensing utilizing the third electrodes and the second electrodes. The first electrodes are different from the third electrodes.

主权项

1. A touch-sensitive display comprising:
common electrodes of a display and second electrodes coupled to a first controller to detect touches by mutual-capacitance touch sensing, wherein the second electrodes include fingers joined at ends thereof to provide a generally U-shaped electrode on the touch-sensitive display; third electrodes disposed between the fingers of the second electrodes such that one of the third electrodes disposed between the fingers of two different, consecutive second electrodes that each comprises at least two fingers joined together, the third electrodes and the second electrodes coupled to a second controller to detect touches by self-capacitance touch sensing utilizing the third electrodes and the second electrodes when the touch-sensitive display is operating in a low power condition; wherein the third electrodes are wider at a first end than a second end such that the third electrodes are shaped to, by the at least one controller, identify a location of a touch along a length of at least one of the third electrodes when the touch-sensitive display is operating in the low power condition, and to detect a gesture to identify a direction of the gesture along a length of at least one of the fingers of the second electrodes during detection of touches by self-capacitance touch sensing when the touch-sensitive display is operating in the low power condition; wherein the common electrodes are not utilized during self-capacitance touch sensing when the touch-sensitive display is operating in the low power condition; and wherein the at least one controller comprises a touch controller coupled to the second electrodes to detect touches when the second electrodes are utilized to detect touches by mutual-capacitance touch sensing, and a display controller is coupled to the common electrodes to drive the common electrodes when the common electrodes are utilized to detect touches, and wherein the touch controller is coupled to the third electrodes to detect touches when the third electrodes are utilized to detect touches by self-capacitance touch sensing.