Multi-domain touch sensing with touch and display circuitry operable in guarded power domain

    公开(公告)号:US11016616B2

    公开(公告)日:2021-05-25

    申请号:US16530938

    申请日:2019-08-02

    Applicant: Apple Inc.

    Abstract: An electronic device can include an integrated touch and display chip that can operate in multiple power domains. For example, the integrated touch and display chip can operate in a guarded power domain during the touch operation and can operate in a system power domain during non-guarded display operations. In some examples, two power domains can include a guarded power domain and a system power domain, whose grounds can be differentiated by a guard buffer signal. In some examples, the guard buffer can be disposed between the integrated touch and display chip and a battery of the device. In some examples, the guard buffer can be disposed between the battery of the device and the chassis of the device.

    Force sensor incorporated into display

    公开(公告)号:US10817096B2

    公开(公告)日:2020-10-27

    申请号:US14616059

    申请日:2015-02-06

    Applicant: Apple Inc.

    Abstract: A force-sensitive device for electronic device. The force inputs may be detected by measuring changes in capacitance, as measured by surface flex of a device having a flexible touchable surface, causing flex at a compressible gap within the device. A capacitive sensor responsive to changes in distance across the compressible gap. The sensor can be positioned above or below, or within, a display element, and above or below, or within, a backlight unit. The device can respond to bending, twisting, or other deformation, to adjust those zero force measurements. The device can use measure of surface flux that appear at positions on the surface not directly the subject of applied force, such as when the user presses on a part of the frame or a surface without capacitive sensors.

    Double-sided touch-sensitive panel with shield and drive combined layer

    公开(公告)号:US10474287B2

    公开(公告)日:2019-11-12

    申请号:US15830375

    申请日:2017-12-04

    Applicant: Apple Inc.

    Abstract: A multi-touch capacitive touch sensor panel can be created using a substrate with column and row traces formed on either side of the substrate. To shield the column (sense) traces from the effects of capacitive coupling from a modulated Vcom layer in an adjacent liquid crystal display (LCD) or any source of capacitive coupling, the row traces can be widened to shield the column traces, and the row traces can be placed closer to the LCD. In particular, the rows can be widened so that there is spacing of about 30 microns between adjacent row traces. In this manner, the row traces can serve the dual functions of driving the touch sensor panel, and also the function of shielding the more sensitive column (sense) traces from the effects of capacitive coupling.

    Input member with capacitive sensor
    116.
    发明授权

    公开(公告)号:US10262179B2

    公开(公告)日:2019-04-16

    申请号:US15585074

    申请日:2017-05-02

    Applicant: Apple Inc.

    Abstract: Input members with capacitive sensors are disclosed. In one embodiment of an electronic button, a first circuit is configured to capture a fingerprint of a user's finger placed on the electronic button, and a second circuit is configured to sense a force applied to the electronic button by the user's finger. The first circuit is further configured to provide temperature information to compensate for temperature sensitivities of the second circuit, and the second circuit is further configured to provide force information to the first circuit.

    Fingerprint sensor in an electronic device

    公开(公告)号:US09984270B2

    公开(公告)日:2018-05-29

    申请号:US14451076

    申请日:2014-08-04

    Applicant: Apple Inc.

    CPC classification number: G06K9/0002 G06K9/228 H04M1/0266 H04M1/67

    Abstract: A fingerprint sensor is incorporated in a display stack in an electronic device. A single fingerprint can be captured at one time at a single pre-defined fixed location on a display. Alternatively, a single fingerprint can be acquired at one time at any location on a display. Alternatively, multiple touches on the display can be acquired substantially simultaneously where only one fingerprint is captured at a time or where all of the fingerprints are acquired at the same time. The fingerprint sensor can be implemented as an integrated circuit connected to a bottom surface of a cover sheet, near the bottom surface of the cover sheet, or connected to a top surface of a display. Alternatively, the fingerprint sensor can be implemented as a full panel fingerprint sensor.

    Sensor with diffusing resistor
    118.
    发明授权

    公开(公告)号:US09921696B2

    公开(公告)日:2018-03-20

    申请号:US14866846

    申请日:2015-09-26

    Applicant: Apple Inc.

    CPC classification number: G06F3/044 G06F3/0418 G06F2203/04103

    Abstract: Electrode configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of a touch sensor panel is disclosed. In some examples, electrodes associated with a more linear signal profile are correlated with lower wobble error. In some examples, electrodes are coupled to adjacent electrodes via diffusing resistors such that the signal profile for each electrode is spread to be more linear. In some configurations, the value of the diffusing resistors and series resistance associated with an electrode is selected based on a desired signal profile for that electrode. In some examples, the series resistance can include a trace resistance and a compensating resistance. The compensating resistance can compensate for a variance in trace resistance between electrodes, thus making series resistance substantially equal for each of the electrodes.

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