TOUCH SENSE INTERVALS IN MULTIPLE DRIVE STATES
First Claim
1. A touch-sensitive display device, comprising:
- a touch sensor having a matrix of row electrodes and column electrodes;
receive circuitry attached to the column electrodes;
drive circuitry configured to progressively drive the row electrodes during sequentially-occurring touch-sensing frames to influence electrical conditions on the column electrodes, the receive circuitry being configured to interpret such electrical conditions to detect touch events occurring on the matrix during the touch-sensing frames;
where the drive circuitry is configured to, in each of a plurality of intervals in each of the touch-sensing frames, drive a different grouping of the row electrodes, such that only that grouping is driven during the interval;
where the drive circuitry is configured to drive the row electrodes for a given grouping simultaneously in the interval in each of a plurality of differently-driven drive states, only one of which is used at a time during the interval; and
where, for a set of possible touch events associated with the row electrodes of the grouping, the drive states produce differing drive state outputs that collectively, but not individually, are usable to detect each of the different touch events.
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Accused Products
Abstract
A touch sensor is provided having a matrix of row electrodes and column electrodes. Associated circuitry progressively drives the row electrodes in successive touch-sensing frames, and the resulting signals on the column electrodes are processed to detect touch events. In each interval of each touch-sensing frame, a different grouping of the row electrodes is driven. Within each interval, the associated grouping is driven in multiple differently-driven drive states. For a set of possible touch events associated with the row electrodes of the grouping, the drive states produce differing drive state outputs that collectively, but not individually, are usable to detect each of the different touch events.
16 Citations
20 Claims
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1. A touch-sensitive display device, comprising:
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a touch sensor having a matrix of row electrodes and column electrodes; receive circuitry attached to the column electrodes; drive circuitry configured to progressively drive the row electrodes during sequentially-occurring touch-sensing frames to influence electrical conditions on the column electrodes, the receive circuitry being configured to interpret such electrical conditions to detect touch events occurring on the matrix during the touch-sensing frames; where the drive circuitry is configured to, in each of a plurality of intervals in each of the touch-sensing frames, drive a different grouping of the row electrodes, such that only that grouping is driven during the interval; where the drive circuitry is configured to drive the row electrodes for a given grouping simultaneously in the interval in each of a plurality of differently-driven drive states, only one of which is used at a time during the interval; and where, for a set of possible touch events associated with the row electrodes of the grouping, the drive states produce differing drive state outputs that collectively, but not individually, are usable to detect each of the different touch events. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A touch-sensing method, comprising:
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in a touch sensor having a matrix of row electrodes and column electrodes, progressively driving the row electrodes during a plurality of sequentially-occurring touch-sensing frames to influence electrical conditions on the column electrodes; in each of a plurality of intervals in each of the touch-sensing frames, the progressive driving including driving a different grouping of the row electrodes, such that only that grouping is driven during the interval; in each of the intervals, the driving of the grouping includes driving the row electrodes of the grouping simultaneously in the interval in each of a plurality of differently-driven drive states, only one of which is used at a time during the interval; and for a set of possible touch events associated with the row electrodes of the grouping, and for each of the plurality of drive states, using a drive state output of the drive state to detect whether a subset of the possible touch events have occurred without reference to drive state outputs of the other drive states. - View Dependent Claims (13, 14, 15, 16)
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17. A touch-sensitive display device, comprising:
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a touch sensor having a matrix of row electrodes and column electrodes; receive circuitry attached to the column electrodes; drive circuitry configured to progressively drive the row electrodes during sequentially-occurring touch-sensing frames to influence electrical conditions on the column electrodes, the receive circuitry being configured to interpret such electrical conditions to detect touch events occurring on the matrix during the touch-sensing frames; where the drive circuitry is configured to, in each of a plurality of intervals in each of the touch-sensing frames, drive a different grouping of the row electrodes, such that only that grouping is driven during the interval; where the drive circuitry is configured to drive the row electrodes for a given grouping simultaneously in the interval in each of a plurality of differently-driven drive states, only one of which is used at a time during the interval; where within each of the groupings, the drive circuitry is configured to (1) drive a row electrode with a first drive signal in a first drive state; and
(2) drive that row electrode with a second drive signal in a second drive state, where the first drive signal and the second drive signal are different from one another; andwhere, for a set of possible touch events associated with the row electrodes of the grouping, the first drive state and the second drive state produce differing drive state outputs that collectively, but not individually, are usable to detect each of the possible touch events. - View Dependent Claims (18, 19, 20)
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Specification