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US 9,285,934 B2Granted
Shielding with display elements
AssigneeSynaptics Incorporated
InventorPetr Shepelev
Life of this patent
Estimating the term…
Abstract
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.
Claims21
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;
- and
- receive resulting signals with the plurality of receiver electrodes, the resulting signals comprising effects corresponding to the transmitter signal.
7 more elements
A processing system for a display device having an integrated capacitive sensing device, the processing system comprising:
- a driver module comprising driver circuitry configured to be coupled to a plurality of transmitter electrodes having a first transmitter electrode and a second transmitter electrode, and to a plurality of conductive electrodes in a thin-film-transistor (TFT) layer of the display device;
- wherein the driver module is configured to drive a transmitter signal with the first transmitter electrode, while electrically floating the second transmitter electrode,
- wherein the driver module is further configured to, 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;
- and
- a receiver module configured to be coupled to a plurality of receiver electrodes and configured to receive resulting signals with the plurality of receiver electrodes, the resulting signals comprising effects corresponding to the transmitter signal.
2 more elements
A method for operating a display device having an integrated capacitive sensing device, the method comprising:
- driving a first transmitter electrode with a transmitter signal for capacitive sensing;
- electrically floating a second transmitter electrode while driving the first transmitter electrode;
- while driving the first transmitter electrode, at least one of:
- (i) driving at least one of a plurality of conductive electrodes in a thin-film-transistor (TFT) layer of the display device with a first signal, and (ii) electrically floating at least one of the plurality of conductive electrodes;
- and
- receiving resulting signals from a plurality of receiving electrodes, the resulting signals comprising effects corresponding to the transmitter signal.
3 more elements
A display device having an integrated capacitive sensing device, comprising:
- a plurality of common electrodes configured to be driven for display updating and capacitive sensing, the plurality of common electrodes comprising a first common electrode set corresponding to a first transmitter electrode and a second common electrode set corresponding to a second transmitter electrode;
- a thin-film-transistor (TFT) layer having a plurality of conductive electrodes;
- a plurality of receiver electrodes;
- and
- a processing system coupled to the plurality of common 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, drive at least one of the plurality of conductive electrodes with a first voltage signal;
- and
- receive resulting signals with the plurality of receiver electrodes, the resulting signals comprising effects corresponding to the transmitter signal.
7 more elements
Dependencies are inferred from the claim text.