Device and method for capacitive sensing
AssigneeSynaptics Incorporated
InventorShinobu Nohtomi
Life of this patent
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Abstract
A processing system includes a level shifter, a drive circuit, and a capacitive sensing circuit. The level shifter is configured to generate a first level-shifted output corresponding to a graylevel value and a second level-shifted output corresponding to capacitive sensing control data. The drive circuit is configured to generate an output voltage based at least in part on the first level-shifted output. The capacitive sensing circuit is configured to receive a resulting signal from a sensor electrode and generate, based at least in part on the second level-shifted output, a capacitive sensing output corresponding to the resulting signal.
Claims20
A processing system, comprising:
- a level shifter configured to:
- generate a first level-shifted output corresponding to a graylevel value;
- and
- generate a second level-shifted output corresponding to capacitive sensing control data;
- a drive circuit configured to generate an output voltage based at least in part on the first level-shifted output;
- and
- a capacitive sensing circuit configured to:
- receive a resulting signal from a sensor electrode;
- and
- generate, based at least in part on the second level-shifted output, a capacitive sensing output corresponding to the resulting signal.
An input device, comprising:
- a sensor electrode;
- a display panel comprising a pixel element;
- and
- a processing system, comprising:
- a level shifter configured to:
- generate a first level-shifted output corresponding to a graylevel value;
- and
- generate a second level-shifted output corresponding to capacitive sensing control data;
- a drive circuit configured to generate, based at least in part on the first level-shifted output, an output voltage;
- and
- a capacitive sensing circuit configured to:
- receive a resulting signal from a sensor electrode;
- and
- generate, based at least in part on the second level-shifted output, a capacitive sensing output corresponding to the resulting signal.
A method, comprising:
- generating, by a level shifter, a first level-shifted output corresponding to a graylevel value;
- and
- generating, by the level shifter, a second level-shifted output corresponding to capacitive sensing control data;
- generating an output voltage based at least in part on the first level-shifted output;
- receiving a resulting signal from a sensor electrode;
- and
- generating, based at least in part on the second level-shifted output, a capacitive sensing output corresponding to the resulting signal.
Dependencies are inferred from the claim text.