Electronic Devices Having Moisture-Insensitive Optical Touch Sensors

    公开(公告)号:US20230341975A1

    公开(公告)日:2023-10-26

    申请号:US18175672

    申请日:2023-02-28

    Applicant: Apple Inc.

    CPC classification number: G06F3/0421

    Abstract: An electronic device may have a touch sensitive display that is insensitive to the presence of moisture. The display may have a two-dimensional optical touch sensor that gathers touch input while the electronic device is immersed in water or otherwise exposed to moisture. The optical touch sensor may include light sources and light detectors. The light sources and the light sensors may be mounted on a common substrate with an array of image pixels. The image pixels may be formed by crystalline semiconductor light-emitting diode dies. Angular filters may be included over the light sources and/or the light detectors to improve discrimination between a user's finger and water droplets. The angular filters may be on-axis light blocking angular filters or off-axis light blocking angular filters.

    OPTICAL-FINGERPRINT DETECTION SYSTEM
    83.
    发明公开

    公开(公告)号:US20230230414A1

    公开(公告)日:2023-07-20

    申请号:US18123880

    申请日:2023-03-20

    Applicant: Apple Inc.

    CPC classification number: G06V40/1318 H04N25/616 H04N25/75

    Abstract: A method of temperature compensation in an optical-fingerprint detection system includes acquiring a first reading associated with one or more pixels of an array. The first reading is a baseline reading. The method further includes acquiring a second reading associated with the one or more pixels of the array. The second reading includes the baseline plus a signal. Producing a temperature compensated signal reading by subtracting the first reading from the second reading. The array is an optical-fingerprint array, and each pixel of the array is coupled to a readout circuit via a pixel switch. The method includes row-based and frame-based schemes and a blind pixel scheme. Readout circuit improvements including multiplexed analog front-end (AFE), charge magnifier with column charge offset compensation and a low-noise gate driver circuit are provided.

    Devices and systems for under display image sensor

    公开(公告)号:US11611058B2

    公开(公告)日:2023-03-21

    申请号:US17003732

    申请日:2020-08-26

    Applicant: Apple Inc.

    Abstract: An optical system is described. The optical system may include a sensor which may be in a mobile device. The optical system may use the same light source for imaging the display and for providing light to a sensor or sensor device. The optical system may be configured so that randomly polarized light will exit the device for viewing so that a user may view the display in any rotated orientation while wearing polarized eyewear. The optical system may further be configured to mitigate reflections in the mobile device from ambient light entering the system and from reflected and backscattered light from cross-contaminating the imaging light of the display.

    Electronic device including palm biometric sensor layer and related methods

    公开(公告)号:US11587353B2

    公开(公告)日:2023-02-21

    申请号:US17092609

    申请日:2020-11-09

    Applicant: APPLE INC.

    Abstract: An electronic device may include a display layer including light transmissive portions and non-transmissive portions. The electronic device may also include a palm biometric image sensor layer beneath the display layer and configured to sense an image of a user's palm positioned above the display layer based upon light reflected from the user's palm passing through the light transmissive portions of the display layer. The electronic device may further include a controller configured to capture image data from the user's palm in cooperation with the palm biometric image sensor layer and determine a surface distortion of the user's palm based upon the image data. The controller may also be configured to perform a biometric authentication of the user's palm based upon the image data and the surface distortion.

    Display stack with integrated photodetectors

    公开(公告)号:US11527582B1

    公开(公告)日:2022-12-13

    申请号:US17006708

    申请日:2020-08-28

    Applicant: Apple Inc.

    Abstract: An electronic device includes a frame and a display stack. The frame defines a first part of an interior volume. The display stack includes a cover attached to the frame. The cover may define a second part of the interior volume. The display stack also includes an array of organic light-emitting diodes (OLEDs) including an array of emissive electroluminescent (EL) regions, and at least one organic photodetector (OPD) disposed between the cover and at least one emissive EL region in the array of emissive electroluminescent regions. The at least one emissive EL region emits light through the at least one OPD. In alternative embodiments, the OLEDs may be stacked on the OPDs, or the OLEDs and OPDs may be interspersed with each other instead of stacked.

    Under-display fingerprint sensing based on off-axis angular light

    公开(公告)号:US11281884B2

    公开(公告)日:2022-03-22

    申请号:US17002365

    申请日:2020-08-25

    Applicant: Apple Inc.

    Abstract: An apparatus for touch-sensing includes a light-emitting layer covered by a transparent layer and configured to illuminate a surface touching the transparent layer and to allow transmission of reflected light rays from the surface to underlying layers. The underlying layers include an optical coupling layer, a collimator layer and a pixelated image sensor. The optical coupling layer bends the reflected light rays to create oblique light rays. The collimator layer includes a number of apertures to collimate the received light rays. The pixelated image sensor senses the collimated oblique light rays.

    Differential acoustic touch and force sensing

    公开(公告)号:US11144158B2

    公开(公告)日:2021-10-12

    申请号:US15988991

    申请日:2018-05-24

    Applicant: Apple Inc.

    Abstract: Acoustic touch and/or force sensing system architectures and methods for acoustic touch and/or force sensing can be used to detect a position of an object touching a surface and an amount of force applied to the surface by the object. The position and/or an applied force can be determined using time-of-flight (TOF) techniques, for example. Acoustic touch sensing can utilize transducers (e.g., piezoelectric) to simultaneously transmit ultrasonic waves along a surface and through a thickness of a deformable material. The location of the object and the applied force can be determined based on the amount of time elapsing between the transmission of the waves and receipt of the reflected waves. In some examples, an acoustic touch sensing system can be insensitive to water contact on the device surface, and thus acoustic touch sensing can be used for touch sensing in devices that may become wet or fully submerged in water.

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