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Patent Agency Ranking
公开(公告)号：US20240302915A1
公开(公告)日：2024-09-12
申请号：US18595499
申请日：2024-03-05
Applicant: NXP B.V.
Inventor： Frederic Darthenay , Jean-Robert Tourret , Franck Goussin , Vincent Geffroy
CPC classification number: G06F3/0416 , G06F3/0446 , G06F2203/04111
Abstract: A touch panel includes a first plurality of electrodes and a second plurality of electrodes. A plurality of transmitters generate a plurality of transmit signals by modulating a common sine wave signal with a set of orthogonal modulation signals, and drive each transmit signal onto a corresponding electrode of the first plurality of electrodes. Each transmit signal is generated by modulating the common sine wave signal with a unique orthogonal modulation signal of the set of orthogonal modulation signals. At least two of the plurality of transmit signals are not orthogonal. Each receiver of a plurality of receivers senses a receive signal on a corresponding electrode of the second plurality of electrodes and generates a set of correlation signals by correlating the receive signal with each transmit signal of the plurality of transmit signals. The sets of correlation signals are used to detect a touch event on the touch panel.
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公开(公告)号：US20240393910A1
公开(公告)日：2024-11-28
申请号：US18664150
申请日：2024-05-14
Applicant: NXP B.V.
Inventor： Frederic Darthenay , Jean-Robert Tourret , Franck Goussin , Vincent Geffroy
Abstract: A touch screen is disclosed having a length and a height, and comprising interspaced and galvanically isolated first and second arrays of touch pads; wherein the first array of touch pads comprises a plurality of first strings of series-connected touch pads, each first string forming a drive line and extending in a first general direction; wherein the second array of touch pads comprises a plurality of second strings of series-connected touch pads, each second string forming a read line and extending in a second general direction, different to said first general direction; wherein the first general direction and the second general direction are each different from the length direction; and wherein the touch screen is configured for capacitive-based sensing which may be based on a change in a mutual capacitance between individual ones of the drive lines and individual ones of the read lines.
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公开(公告)号：US20250036238A1
公开(公告)日：2025-01-30
申请号：US18764690
申请日：2024-07-05
Applicant: NXP B.V.
Inventor： Jean-Robert Tourret , Franck Goussin , Frederic Darthenay , Vincent Geffroy
Abstract: A method for display noise canceling in a touch sensing system includes measuring a first feedback voltage of a feedback node resistively coupled to a line voltage of a capacitive touch panel, the line voltage formed by a continuous wave output of an amplifier responsive to a reference voltage difference between the first feedback voltage and a reference voltage. A second feedback voltage is clamped to a first upper voltage threshold in response to a first voltage difference between the first feedback voltage and the reference voltage being greater than the first upper voltage threshold. The second feedback voltage is clamped to a first lower voltage threshold in response to the first voltage difference being less than the first lower voltage threshold.
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4.发明公开公开(公告)号：US20240302918A1
公开(公告)日：2024-09-12
申请号：US18587195
申请日：2024-02-26
Applicant: NXP B.V.
Inventor： Franck Goussin , Frederic Darthenay , Jean-Robert Tourret , Vincent Geffroy
CPC classification number: G06F3/04166 , G06F3/0446
Abstract: A touch panel system that includes drivers for providing detection signals on a first plurality of electrodes of a touch panel where each detection signal includes one or more frequency signal components with each frequency signal component having a frequency and a phase offset. The detection signals includes at least three phase offsets for at least one frequency of the frequency signal components. Each detection signal has a unique frequency-phase offset combination of the one or more frequency signal components. The unique combinations allow for the determination of a touch at specific locations on the panel by sensing signals on a second set of electrodes.
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5.发明公开公开(公告)号：US20240097620A1
公开(公告)日：2024-03-21
申请号：US18452204
申请日：2023-08-18
Applicant: NXP B.V.
Inventor： Vincent Geffroy
CPC classification number: H03F1/303 , H03F3/45179 , H03F2200/141
Abstract: An error amplifier including a differential pair circuit, a resistive device, a low voltage capacitor, and a protection device. The differential pair circuit is coupled between an upper supply node and a lower supply node with first and second intermediate nodes and is responsive to a difference between a reference voltage and a feedback voltage for driving a control voltage developed on the second intermediate node. The resistive device is coupled between the second intermediate node and a low voltage node, and the low voltage capacitor and the protection device are coupled between the low voltage node and the lower supply node. The protection device is dynamically controlled by the first intermediate node to prevent the low voltage node from exceeding a predetermined maximum level. The protection device may be a transistor having size parameters based on voltage characteristics of the first intermediate node during expected operating conditions.
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