Shifting carrier frequency to avoid interference
First Claim
1. A method of avoiding interference in an integrated capacitive sensor device and display device, said method comprising:
- transmitting a first transmitter signal having a first frequency with a combination electrode of said integrated capacitive sensor device and display device, wherein said combination electrode is configured for both capacitive sensing and display updating;
shifting from transmitting said first transmitter signal with said combination electrode to transmitting a second transmitter signal with said combination electrode by changing a duration of at least one non-display update time period of said display device without changing a refresh rate of said display device, said at least one non-display update time period comprising a non-display update time period at an end of a pixel update between display pixel rows to change a horizontal row timing, wherein said second transmitter signal has a second frequency, and wherein said shifting occurs based at least in part upon an amount of interference; and
sharing a synchronization signal indicating the horizontal row timing between the capacitive sensor device and the display device.
3 Assignments
0 Petitions
Accused Products
Abstract
In a method of avoiding interference in an integrated capacitive sensor device and display device, a first transmitter signal having a first frequency 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. A shift is made from transmitting the first transmitter signal with the combination electrode to transmitting a second transmitter signal with the combination electrode. The shift is made by changing a duration of at least one non-display update time period of the display device. The second transmitter signal has a second frequency, and the shifting occurs based at least in part upon an amount of interference.
98 Citations
19 Claims
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1. A method of avoiding interference in an integrated capacitive sensor device and display device, said method comprising:
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transmitting a first transmitter signal having a first frequency with a combination electrode of said integrated capacitive sensor device and display device, wherein said combination electrode is configured for both capacitive sensing and display updating; shifting from transmitting said first transmitter signal with said combination electrode to transmitting a second transmitter signal with said combination electrode by changing a duration of at least one non-display update time period of said display device without changing a refresh rate of said display device, said at least one non-display update time period comprising a non-display update time period at an end of a pixel update between display pixel rows to change a horizontal row timing, wherein said second transmitter signal has a second frequency, and wherein said shifting occurs based at least in part upon an amount of interference; and sharing a synchronization signal indicating the horizontal row timing between the capacitive sensor device and the display device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A processing system communicatively coupled with a capacitive sensor device and a display device, said processing system comprising:
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transmitter circuitry configured for transmitting a first transmitter signal having a first frequency using a combination electrode, said combination electrode configured for both display updating and touch sensing; receiver circuitry configured for receiving a resulting signal using a receiver electrode of said capacitive sensor device, said resulting signal corresponds to said first transmitter signal; and a duration changer configured for changing a duration of at least one non-display update time period of said display device, said at least one non-display update time period comprising a non-display update time period at an end of a pixel update between display pixel rows to change a horizontal row timing, wherein said change in duration causes a shift from transmitting said first transmitter signal with said combination electrode to transmitting a second transmitter signal with said combination electrode, wherein said second transmitter signal has a second frequency, wherein said change does not substantially change a refresh rate of said display device, and wherein said change occurs based at least in part upon an amount of interference, wherein the processing system is configured for sharing a synchronization signal indicating the horizontal row timing between the capacitive sensor device and the display device. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. 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 combination electrode and said receiver electrode, said processing system configured to; transmit a first transmitter signal having a first frequency using said combination electrode; receive a resulting signal using said receiver electrode, said resulting signal corresponds to said first transmitter signal; change a duration of at least one non-display update time period of said display device, wherein said change in duration causes a shift from transmitting said first transmitter signal with said combination electrode to transmitting a second transmitter signal with said combination electrode, wherein said second transmitter signal has a second frequency, wherein said change does not substantially change a refresh rate of said display device, wherein said at least one non-display update time period comprising a non-display update time period at an end of a pixel update between display pixel rows to change a horizontal row timing, and wherein said change occurs based at least in part upon an amount of interference; and perform synchronization signaling indicating the horizontal row timing for the display device and the touch screen device. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification