DISPLAY DEVICE HAVING AN INTEGRATED SENSING DEVICE WITH IMPROVED PROXIMITY SENSING
First Claim
9. A processing system for an input device having a display device integrated with a capacitive sensing device, the processing system comprising:
- a driver module configured to be selectively coupled to at least a first sensor electrode of the plurality of sensor electrode and to drive the first sensor electrode as a transmitter electrode for transcapacitive sensing; and
a sensor module configure to be selectively coupled to at least a second sensor electrode of the plurality of sensor electrodes and to drive and receive with the second sensor electrode for absolute capacitive sensing.
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Abstract
Embodiments described herein include a method and apparatus for capacitive sensing in input devices integrated with a display device. In one embodiment, a processing system for a display device comprising an integrated capacitive sensing device is provided that includes a display driver module, a transmitter module, and a receiver module. The display driver and transmitter modules are configured to operate in a display update mode and a sleep mode. The receiver module is configured to, while operating in a doze mode, communicate with and trigger the transmitter module to enter the active sensing mode while the display driver module remains in the sleep mode when presence of an object is detected based on the resulting signals.
26 Citations
20 Claims
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9. A processing system for an input device having a display device integrated with a capacitive sensing device, the processing system comprising:
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a driver module configured to be selectively coupled to at least a first sensor electrode of the plurality of sensor electrode and to drive the first sensor electrode as a transmitter electrode for transcapacitive sensing; and a sensor module configure to be selectively coupled to at least a second sensor electrode of the plurality of sensor electrodes and to drive and receive with the second sensor electrode for absolute capacitive sensing. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14)
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11-1. The processing system of claim 9, wherein the sensor module is configured switch between an absolute sensing mode of operation and a transcapacitive mode of operation at a predefined frequency.
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15. A method for sensing presence of an input object using capacitive sensing device, comprising:
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coupling a first set of sensor electrodes of a plurality of sensor electrodes to a processing system, the processing system configured to drive the first set of sensor electrodes for absolute capacitive sensing, wherein each of the plurality of sensor electrodes comprising display electrodes and the processing system is configured for display updating and capacitive sensing; coupling a second set of sensor electrodes of the plurality of sensor electrodes to the processing system, the processing system configured to drive the second set of sensor electrodes for transcapacitive sensing, wherein the second set of sensor electrodes have a plane area larger than a plane area of the first set of sensor electrodes. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification