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    CONTROLLING EMISSION RATES IN DIGITAL DISPLAYS
    1.
    发明申请
    CONTROLLING EMISSION RATES IN DIGITAL DISPLAYS 审中-公开

    公开(公告)号：US20190279553A1

    公开(公告)日：2019-09-12

    申请号：US16334698

    申请日：2017-09-13

    Applicant: Apple Inc.

    Inventor： Mohammad B. Vahid Far ,  Tore Nauta ,  Hopil Bae ,  Mahdi Farrokh Baroughi ,  Jun Li

    IPC: G09G3/20 ,  G09G3/3233 ,  G06F3/041

    Abstract: A display device may include pixels that display image data. The display device may also include a circuit that receives pixel data having a gray level for at least one pixel, such that the pixel data corresponds to a frame of the image data and the frame includes sub-frames. The pixel data causes the circuit to provide at least one current pulse to the at least one pixel according to a first order of the sub-frames. The circuit may also receive a second order of the sub-frames, such that the second order is mapped with respect to the first order, and at least one current pulse is provided to the at least one pixel according to the second order. As such, visual artifacts depicted on the display are reduced.

    Hybrid microdriver architecture for driving microLED displays
    2.
    发明授权
    Hybrid microdriver architecture for driving microLED displays 有权

    公开(公告)号：US10395590B1

    公开(公告)日：2019-08-27

    申请号：US15247698

    申请日：2016-08-25

    Applicant: Apple Inc.

    Inventor： Chin Wei Lin ,  Shinya Ono ,  Vasudha Gupta ,  Mohammad B. Vahid Far

    IPC: G09G3/3233 ,  G09G3/3275

    Abstract: Methods, systems, and apparatuses for controlling an emission of the light emitting devices are described herein. The light emitting devices may be light emitting diode (LED) devices including μLED devices or organic LED (OLED) devices. Emission control of the LED may be performed using a micro-scale driving circuit (e.g., μDriver) containing drive transistors for constant current driving of the light emitting devices. One embodiment provides for a display driver hardware circuit comprising a thin film transistor (TFT) backplane, an integrated circuit including emission logic to cause an LED emission pulse, and a ramp signal generator to cause a voltage ramp having a slope based on an analog input voltage from the TFT backplane. The length of the LED emission pulse is related to the slope of the voltage ramp. In one embodiment the TFT backplane includes a low temperature poly-silicon (LTPS) transistor and/or an Indium Gallium Zinc Oxide (IGZO) transistor.

    Hybrid microdriver architectures having relaxed comparator requirements
    3.
    发明授权
    Hybrid microdriver architectures having relaxed comparator requirements 有权

    公开(公告)号：US10395589B1

    公开(公告)日：2019-08-27

    申请号：US15247678

    申请日：2016-08-25

    Applicant: Apple Inc.

    Inventor： Mohammad B. Vahid Far ,  Wei H. Yao ,  Yafei Bi

    IPC: G09G3/3233 ,  G09G3/3283

    Abstract: Methods, systems, and apparatuses for controlling an emission of the light emitting devices are described herein. The light emitting devices may be light emitting diode (LED) devices including μLED devices or organic LED (OLED) devices. Emission control of the LED may be performed using a micro-scale driving circuit (e.g., μDriver) containing drive transistors for constant current driving of the light emitting devices. One embodiment provides for a display driver hardware circuit comprising a thin film transistor (TFT) backplane and an integrated circuit to switch and drive a plurality of LED devices, the integrated circuit including emission logic to generate an emission pulse to an LED device, the emission logic including comparator logic having a relaxed comparator offset, the comparator logic to compare a voltage from a storage capacitor on the TFT backplane to a reference voltage to control a length of the emission pulse provided by the emission logic.

    System and method for voltage and current sensing for compensation in an electronic display via analog front end
    4.
    发明授权
    System and method for voltage and current sensing for compensation in an electronic display via analog front end 有权

    公开(公告)号：US10388223B2

    公开(公告)日：2019-08-20

    申请号：US15275371

    申请日：2016-09-24

    Applicant: Apple Inc.

    Inventor： Kingsuk Brahma ,  Mohammad B. Vahid Far

    IPC: G09G3/3258 ,  G09G3/3233 ,  H03M1/34 ,  H03M1/50

    Abstract: An electronic device includes display circuitry with a source amplifier and a data line that drives signals provided by the source amplifier. Additionally, the display circuitry includes pixels, where each pixel includes a diode, and a scan thin-film-transistor (TFT) that selectively couples the pixels with the data line, based upon a scan control signal. Sensing circuitry of the electronic device includes a capacitor that is electrically coupled to the data line, wherein the capacitor is pre-charged by the source amplifier when the scan TFT is OFF and a sensing amplifier electrically coupled to the data line, providing a sensing output of both a diode voltage of the one or more pixels and a driving current of the one or more pixels, depending on the current operation of the sensing circuitry. Further, conversion circuitry converts the sensing output from an analog domain to a digital domain.

    Delay state-switching RF module
    7.
    发明授权
    Delay state-switching RF module 有权

    公开(公告)号：US11356138B1

    公开(公告)日：2022-06-07

    申请号：US17146967

    申请日：2021-01-12

    Applicant: Apple Inc.

    Inventor： Mohammad B. Vahid Far ,  Khaye Loon Wei ,  Mohammad-Saleh Moonesan

    IPC: H04B1/00 ,  H04B1/44 ,  H04B1/403 ,  H04B1/401 ,  H04B17/364

    Abstract: Embodiments disclosed herein relate to transition of a radio frequency module between a first operating state and a second operating state. The first and second states may be passive/slow (e.g., non-active) states or active/fast states. A passive state may include a sleep state, an idle state, an off state, or a low power state. An active state may include a receiving state or a transmitting state, for receiving and transmitting signals, respectively. If the first operating state is an active state and the second operating state is a passive state, the transition from the first operating state may be delayed such that the radio frequency module transitions directly from the first operating state to a third operating state. This enables the radio frequency module to avoid entering a passive second state with a slow settling time which can interfere with communications and operation of the radio frequency module.

    Power cycle display sensing
    9.
    发明授权
    Power cycle display sensing 有权

    公开(公告)号：US10388201B2

    公开(公告)日：2019-08-20

    申请号：US15697132

    申请日：2017-09-06

    Applicant: Apple Inc.

    Inventor： Sun-Il Chang ,  Hyunwoo Nho ,  Hung Sheng Lin ,  Junhua Tan ,  Jie Won Ryu ,  Kingsuk Brahma ,  Jesse A. Richmond ,  Mohammad B. Vahid Far ,  Yafei Bi

    IPC: G09G3/00 ,  G09G3/20 ,  G09G5/00

    Abstract: Electronic devices and methods pertain to reducing artifacts resulting from a thermal profile preexisting a boot up of an electronic device are disclosed. Scanning driving circuitry of the electronic device scans at least a portion of one or more pixels of an active area of a display using a boot up scan before a boot up sequence of at least a portion of an electronic device completes. The results of the boot up scan are stored in local buffers and transferred to one or more processors upon connection to the one or more processors. The results of the boot up scan cause the one or more processors to modify image data to reduce or eliminate artifacts that may result during boot up due to thermal profiles or other parameters that may cause artifacts.

    NOISE MITIGATION FOR DISPLAY PANEL SENSING
    10.
    发明申请
    NOISE MITIGATION FOR DISPLAY PANEL SENSING 审中-公开

    公开(公告)号：US20190221146A1

    公开(公告)日：2019-07-18

    申请号：US16361018

    申请日：2019-03-21

    Applicant: Apple Inc.

    Inventor： Hung Sheng Lin ,  Shengkui Gao ,  Hyunwoo Nho ,  Chin-Wei Lin ,  Mohammad B. Vahid Far ,  Jie Won Ryu ,  Kingsuk Brahma ,  Junhua Tan ,  Sun-II Chang ,  Shinya Ono ,  Jesse A. Richmond ,  Yafei Bi ,  Derek K. Shaeffer

    IPC: G09G3/00

    Abstract: Systems and methods are provided for differential sensing (DS), difference-differential sensing (DDS), correlated double sampling (CDS), and/or programmable capacitor matching to reduce display panel sensing noise. An electronic device may include one or more processors and an electronic display. The one or more processors may generate image data and adjust the image data based at least in part on display sensing feedback. The electronic display may employ sensing circuitry that obtains the display sensing feedback at least in part by applying test data to a pixel of a column of an active area of the display and differentially senses an electrical value of the pixel in comparison to a reference signal from a different column. This reference signal may provide a common mode noise reference, which is removed by the differential sensing and thereby enhances a quality of the sensed electrical value of the pixel.

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