Sensing during non-display update time to avoid interference
First Claim
1. A method of capacitive sensing using an integrated capacitive sensor device and display device, said method comprising:
- transmitting a transmitter signal with a combination electrode of said integrated capacitive sensor device and display device, said combination electrode configured for both capacitive sensing and display updating, wherein said transmitter signal transitions at least twice during a non-display update time period associated with a row update of a display frame of said display device;
updating a display of said display device during a first update time period of said display frame occurring prior to said non-display update time period;
updating said display during a second update time period of said display frame occurring subsequent to said non-display update time period;
receiving a first resulting signal with a receiver electrode of said integrated capacitive sensor device and display device during said non-display update time period, wherein said first resulting signal corresponds to said transmitter signal;
acquiring a first demodulated output by demodulating said first resulting signal in a first way;
acquiring a second demodulated output by demodulating said first resulting signal in a second way, wherein said second way and said first way differ; and
shifting, based at least in part upon an amount of interference, from using said first demodulated output for determining positional information to using said second demodulated output for determining positional information,wherein said amount of interference is based on a measurement of a third demodulated output, wherein said third demodulated output is acquired by demodulating a second resulting signal in one of said first way and said second way, and wherein said second resulting signal is received by said receiver electrode during a time period when no transmitter signal is transmitted with said combination electrode.
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Accused Products
Abstract
In a method of capacitive sensing using an integrated capacitive sensor device and display device, a transmitter signal is transmitted with a combination electrode of the integrated capacitive sensor device and display device. The combination electrode is configured for both capacitive sensing and display updating. The transmitter signal transitions at least twice during a non-display update time period associated with row update of the display device. A display of the display device is updated during an update time period. A resulting signal is received with a receiver electrode of the integrated capacitive sensor device and display device during the non-display update time period. The resulting signal corresponds to the transmitter signal.
95 Citations
16 Claims
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1. A method of capacitive sensing using an integrated capacitive sensor device and display device, said method comprising:
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transmitting a transmitter signal with a combination electrode of said integrated capacitive sensor device and display device, said combination electrode configured for both capacitive sensing and display updating, wherein said transmitter signal transitions at least twice during a non-display update time period associated with a row update of a display frame of said display device; updating a display of said display device during a first update time period of said display frame occurring prior to said non-display update time period; updating said display during a second update time period of said display frame occurring subsequent to said non-display update time period; receiving a first resulting signal with a receiver electrode of said integrated capacitive sensor device and display device during said non-display update time period, wherein said first resulting signal corresponds to said transmitter signal; acquiring a first demodulated output by demodulating said first resulting signal in a first way; acquiring a second demodulated output by demodulating said first resulting signal in a second way, wherein said second way and said first way differ; and shifting, based at least in part upon an amount of interference, from using said first demodulated output for determining positional information to using said second demodulated output for determining positional information, wherein said amount of interference is based on a measurement of a third demodulated output, wherein said third demodulated output is acquired by demodulating a second resulting signal in one of said first way and said second way, and wherein said second resulting signal is received by said receiver electrode during a time period when no transmitter signal is transmitted with said combination electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A processing system comprising:
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transmitter circuitry configured to transmit a transmitter signal with a combination electrode of an integrated capacitive sensor device and display device during a non-display update time period associated with a first row update of a display within a display frame of said display device, wherein said transmitter signal transitions at least two times during said non-display update time period associated with said first row update of said display device, wherein said transmitter signal is transmitted between said first row update and a second row update of said display frame, and wherein said combination electrode is configured for both capacitive sensing and display updating; and receiver circuitry configured to receive a first resulting signal with a receiver electrode during said non-display update time period, wherein said first resulting signal corresponds to said transmitter signal; demodulation circuitry configured to; acquire a first demodulated output by demodulating said first resulting signal in a first way; and acquire a second demodulated output by demodulating said first resulting signal in a second way, wherein said second way and said first way differ; and a demodulation type selector configured to shift, based at least in part upon an amount of interference, said demodulation circuitry from using said first demodulated output for determining positional information to using said second demodulated output for determining positional information, wherein said amount of interference is based on a measurement of a third demodulated output, wherein said third demodulated output is acquired by demodulating a second resulting signal in one of said first way and said second way, and wherein said second resulting signal is received by said receiver electrode during a time period when no transmitter signal is transmitted with said combination electrode. - View Dependent Claims (10, 11, 12)
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13. A touch screen device comprising:
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a display device, said display device comprising a combination electrode configured for both display updating and touch sensing; a receiver electrode proximate said combination electrode, said receiver electrode configured for touch sensing; and a processing system communicatively coupled with said display device, said processing system configured to; transmit a transmitter signal with said combination electrode during a non-display update time period associated with a first row update of a display within a display frame of said display device, wherein said transmitter signal is transmitted between said first row update and a second row update of said display frame, and wherein said transmitter signal transitions at least two times during said non-display update time period associated with said first row update of said display device; receive a first resulting signal with said receiver electrode during said non-display update time period, said first resulting signal corresponds to said transmitter signal; acquire a first demodulated output by demodulating said first resulting signal in a first way; acquire a second demodulated output by demodulating said first resulting signal in a second way, wherein said second way and said first way differ; and shift, based at least in part upon an amount of interference, from using said first demodulated output for determining positional information to using said second demodulated output for determining positional information, wherein said amount of interference is based on a measurement of a third demodulated output, wherein said third demodulated output is acquired by demodulating a second resulting signal in one of said first way and said second way, and wherein said second resulting signal is received by said receiver electrode during a time period when no transmitter signal is transmitted with said combination electrode. - View Dependent Claims (14, 15, 16)
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Specification