Switchable area enhancement for flexible capacitive sensing
First Claim
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1. An input device comprising:
- a plurality of sensor electrodes;
a first plurality of buses selectively coupled to the plurality of sensor electrodes;
a second plurality of buses ohmically separated from the first plurality of buses, the second plurality of buses selectively coupled to the sensor electrodes;
a plurality of switching elements, wherein each switching element in the plurality of switching elements is paired with a sensor electrode in the plurality of sensor electrodes, and wherein a first switching element in the plurality of switching elements is operable to couple the sensor electrode to either a first bus in the first plurality of buses or a second bus in the second plurality of buses; and
a processing system coupled to the first plurality of buses and coupled to the second plurality of buses, the processing system configured to;
drive signals with one or more buses in the first plurality of buses when the one or more buses in the first plurality of buses are selectively coupled to the plurality of sensor electrodes, anddrive signals with one or more buses in the second plurality of buses when the one or more buses in the second plurality of buses are selectively coupled to the plurality of sensor electrodes.
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Abstract
Embodiments of the invention generally provide an input device having a plurality of sensor electrodes that can be configured to be scanned in a first direction or a second direction. The input device includes a set of sensor electrodes and first and second sets of buses. The first buses are oriented in a first direction and the second buses are oriented in a second direction. The input device also includes a set of switching elements that are each configured to couple one of the sensor electrodes to either a bus in the first set of buses or a bus in the second set of buses. These embodiments allow the sensor electrodes to be scanned in a variety of patterns for flexible sensing functionality.
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Citations
19 Claims
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1. An input device comprising:
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a plurality of sensor electrodes; a first plurality of buses selectively coupled to the plurality of sensor electrodes; a second plurality of buses ohmically separated from the first plurality of buses, the second plurality of buses selectively coupled to the sensor electrodes; a plurality of switching elements, wherein each switching element in the plurality of switching elements is paired with a sensor electrode in the plurality of sensor electrodes, and wherein a first switching element in the plurality of switching elements is operable to couple the sensor electrode to either a first bus in the first plurality of buses or a second bus in the second plurality of buses; and a processing system coupled to the first plurality of buses and coupled to the second plurality of buses, the processing system configured to; drive signals with one or more buses in the first plurality of buses when the one or more buses in the first plurality of buses are selectively coupled to the plurality of sensor electrodes, and drive signals with one or more buses in the second plurality of buses when the one or more buses in the second plurality of buses are selectively coupled to the plurality of sensor electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A processing system for an input device, the processing system comprising:
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a coupling module comprising coupling circuitry configured to; couple one or more sensor electrodes in a plurality of sensor electrodes to a first bus, and couple the one or more sensor electrodes to a second bus; a transmitter module comprising transmitter circuitry configured to; drive first signals on the first bus when the first bus is coupled to the one or more sensor electrodes, wherein driving the first signals causes the first bus to be coupled to the one or more sensor electrodes, and drive second signals on the second bus when the second bus is coupled to the one or more sensor electrodes wherein driving the second signals causes the second bus to be coupled to the one or more sensor electrodes; and a determining module configured to; determine presence or lack thereof of an input object based on signals received in response to driving signals on the first bus when the first bus is coupled to the one or more sensor electrodes; and determine presence or lack thereof of the input object based on signals received in response to driving signals on the second bus when the second bus is coupled to the one or more sensor electrodes. - View Dependent Claims (14, 15, 16)
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17. A method for operating an input device, the method comprising:
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driving first signals on a first bus, thereby coupling to the first bus one or more sensor electrodes to define a first group of sensor electrodes; sensing presence or lack thereof of an input object utilizing the driven first signals and the first group of sensor electrodes; coupling to the first bus one or more sensor electrodes that include at least one sensor electrode of the first group to define a second group of sensor electrodes, the first and second groups of sensor electrodes different in one or more of number or position of the sensor electrodes; and sensing presence or lack thereof of the input object utilizing the second group of sensor electrodes. - View Dependent Claims (18, 19)
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Specification