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US 10,375,278 B2Granted
Noise cancellation
AssigneeApple Inc.
InventorsKeitaro Yamashita, Ting-Kuo Chang, Cheng-Ho Yu, Warren S. Rieutort-Louis
Life of this patent
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Abstract
Electronic devices, storage medium containing instructions, and methods pertain to cancelling noise that results from application of voltages on gates of transistors in a display. One or more compensation or dummy drivers are used to apply a compensation voltage that is an inversion of voltages applied on the gates of the transistors.
Claims18
A method for driving a display comprising:
- determining whether a voltage is to be applied to a gate of a transistor of the display;
- and
- injecting, into a substrate of the display, a compensation voltage inverse to the voltage to be applied to the transistor, wherein injecting the compensation voltage comprises injecting the compensation voltage using a compensation gate driver clock that is connected to the substrate, and wherein the compensation gate driver clock compromises a dummy gate driver clock that is not used to drive any gate of any transistor.
An electronic display comprising:
- a substrate;
- a touch electrode configured to detect touch on the electronic display;
- pixel circuitry coupled to the substrate;
- a gate driver clock coupled to the substrate, wherein the gate driver clock is configured to drive gates in the pixel circuitry;
- and
- a compensation gate driver clock configured to apply to the substrate a compensation voltage inverse to a voltage applied by the gate driver clock to at least partially compensate for voltage fluctuations in the touch electrode resulting from application of the voltage without driving any of the gates in the pixel circuitry.
3 more elements
An electronic display, comprising:
- a touch electrode configured to detect touch on the electronic display;
- a first gate driver clock configured to drive a first gate in the electronic display;
- a second gate driver clock configured to drive a second gate in the electronic display;
- a first compensation driver clock to apply a first compensation voltage inverse to a first voltage applied by the first gate driver clock to at least partially compensate for voltage fluctuations in the touch electrode resulting from application of the first voltage;
- and
- a second compensation driver clock to apply a second compensation voltage inverse to a second voltage applied by the second gate driver clock to at least partially compensate for voltage fluctuations in the touch electrode resulting from application of the second voltage.
3 more elements
Dependencies are inferred from the claim text.