Common electrode driving and compensation for pixelated self-capacitance touch screen
First Claim
1. A touch screen comprising:
- a plurality of common electrodes configured to operate as display circuitry during a display phase, and to operate as touch sensing circuitry during a touch sensing phase, wherein the plurality of common electrodes includes;
a first common electrode associated with a first display pixel; and
a second common electrode associated with a second display pixel; and
circuitry configured to;
update the first display pixel at a first time while driving the first common electrode;
while updating the first display pixel and driving the first common electrode, drive the second common electrode until the second display pixel is updated; and
after updating the first display pixel, update the second display pixel at a second time, after the first time, while continuing to drive the second common electrode but not the first common electrode.
0 Assignments
0 Petitions
Accused Products
Abstract
A touch screen is disclosed. A plurality of common electrodes can be configured to operate as display circuitry during a display phase, and to operate as touch sensing circuitry during a touch sensing phase. The plurality of common electrodes can include a first common electrode associated with a first display pixel, and a second common electrode associated with a second display pixel. Circuitry can be configured to update the first display pixel at a first time while driving the first common electrode but not the second common electrode, and update the second display pixel at a second time, after the first time, while driving the second common electrode but not the first common electrode. In some examples, the circuitry can be configured to leave the second common electrode floating while driving the first common electrode, and leave the first common electrode floating while driving the second common electrode.
-
Citations
24 Claims
-
1. A touch screen comprising:
a plurality of common electrodes configured to operate as display circuitry during a display phase, and to operate as touch sensing circuitry during a touch sensing phase, wherein the plurality of common electrodes includes; a first common electrode associated with a first display pixel; and a second common electrode associated with a second display pixel; and
circuitry configured to;update the first display pixel at a first time while driving the first common electrode; while updating the first display pixel and driving the first common electrode, drive the second common electrode until the second display pixel is updated; and after updating the first display pixel, update the second display pixel at a second time, after the first time, while continuing to drive the second common electrode but not the first common electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
15. A touch screen comprising:
-
a plurality of common electrodes, the plurality of common electrodes including a first set of common electrodes and a second set of common electrodes, the first set of common electrodes associated with a first set of display pixels, and the second set of common electrodes associated with a second set of display pixels; and circuitry configured to; drive the first set of common electrodes to a display voltage while updating the first set of display pixels based on the display voltage; while updating the first set of display pixels and driving the first set of common electrodes, drive the second set of common electrodes to the display voltage until the second set of display pixels is updated; after updating the first set of display pixels, update the second set of display pixels based on the display voltage while continuing to drive the second set of common electrodes to the display voltage but not the first set of common electrodes; and while driving the first set of common electrodes and the second set of common electrodes to the display voltage, drive a third set of common electrodes to a touch voltage. - View Dependent Claims (16, 17, 18, 19, 20, 21)
-
-
22. A method of operating a touch screen, the touch screen comprising a plurality of common electrodes configured to operate as display circuitry during a display phase, and to operate as touch sensing circuitry during a touch sensing phase, the method comprising:
-
updating a first display pixel at a first time while driving a first common electrode, the first common electrode associated with the first display pixel, and the second common electrode associated with a second display pixel; while updating the first display pixel and driving the first common electrode, driving the second common electrode until the second display pixel is updated; and after updating the first display pixel, updating the second display pixel at a second time, after the first time, while continuing to drive the second common electrode but not the first common electrode.
-
-
23. A method of operating a touch screen, the touch screen comprising a plurality of common electrodes, the method comprising:
-
driving a first set of the plurality of common electrodes to a display voltage while updating a first set of display pixels based on the display voltage, the first set of display pixels associated with the first set of common electrodes; while updating the first set of display pixels and driving the first set of common electrodes, driving a second set of the plurality of common electrodes to the display voltage until a second set of display pixels, associated with the second set of common electrodes, is updated; after updating the first set of display pixels, updating the second set of display pixels based on the display voltage while continuing to drive the second set of common electrodes to the display voltage but not the first set of common electrodes; and while driving the first set of common electrodes and the second set of common electrodes to the display voltage, driving a third set of the plurality of common electrodes to a touch voltage, the third set of common electrodes associated with a third set of display pixels. - View Dependent Claims (24)
-
Specification