SHIELDING WITH DISPLAY ELEMENTS

摘要

A method and apparatus for operating an input device having a touch sensor and associated display device is discussed. While performing touch sensing, inactive transmitter electrodes of the touch sensor are electrically floated, and one or more source lines from the display device are operated to achieve shielding against interference, such as that coming from a backlight underneath the touch sensor.

主权项

1. A display device, comprising:
a plurality of transmitter electrodes configured to be driven for capacitive sensing and having a first transmitter electrode and a second transmitter electrode; a plurality of receiver electrodes; a plurality of conductive electrodes in a thin-film-transistor (TFT) layer of the display device; a processing system coupled to the plurality of transmitter electrodes, the plurality of receiver electrodes, and the plurality of conductive electrodes, wherein the processing system is configured to:
drive the first transmitter electrode with a transmitter signal;electrically float the second transmitter electrode while driving the first transmitter electrode;while driving the first transmitter electrode, at least one of: (i) drive at least one of the plurality of conductive electrodes with a first signal; and (ii) electrically float at least one of the plurality of conductive electrodes; andreceive resulting signals with the plurality of receiver electrodes, the resulting signals comprising effects corresponding to the transmitter signal.