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    Wireless charging system with object detection
    1.
    发明授权
    Wireless charging system with object detection 有权

    公开(公告)号：US10530191B2

    公开(公告)日：2020-01-07

    申请号：US15804145

    申请日：2017-11-06

    Applicant: Apple Inc.

    Inventor： Antoin J. Russell ,  Bharat K. Patel ,  Manisha P. Pandya ,  Zaki Moussaoui

    IPC: H02J50/60 ,  H02J50/12 ,  G01R15/18 ,  H02J7/02

    Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using an output circuit that includes a wireless power transmitting coil. Measurement circuitry is coupled to the output circuit to help determine whether the wireless power receiving device is present and ready to accept transmission of wireless power. The measurement circuitry includes a measurement circuit that is coupled to the output circuit and that measures signals while oscillator circuitry supplies the output circuit with signals at a probe frequency. The measurement circuitry also includes a measurement circuit that is coupled to the output circuit and that measures signals while the oscillator circuitry sweeps signals applied to the output circuit between a first frequency and a second frequency to detect sensitive devices such as radio-frequency identification devices. Impulse response circuitry in the measurement circuitry is used to make inductance and Q factor measurements.

    DYNAMIC POWER SHARING AMONG MULTIPLE PHYSICAL PORTS
    3.
    发明申请
    DYNAMIC POWER SHARING AMONG MULTIPLE PHYSICAL PORTS 审中-公开
    动态功率共享多个物理位置

    公开(公告)号：US20160336745A1

    公开(公告)日：2016-11-17

    申请号：US15154258

    申请日：2016-05-13

    Applicant: Apple Inc.

    Inventor： Manisha P. Pandya ,  Nicholas A. Sims

    IPC: H02J1/00 ,  H02J7/00

    CPC classification number: H02J1/00 ,  G06F1/263 ,  G06F1/266 ,  G06F1/305 ,  H02J7/0013 ,  H02J7/0052 ,  H02J7/0054 ,  H02J7/0068 ,  H02J7/0072 ,  H02J2007/0062 ,  H02J2007/0096

    Abstract: The disclosed embodiments provide a charging device. The charging device includes a battery, a first physical port and a management apparatus. The management apparatus determines a first type and a first state of a first load device connected to the first physical port and allocates power supplied to the first load device through the first physical port according to the first type and the first state of the first load device.

    Abstract translation: 所公开的实施例提供一种充电装置。 充电装置包括电池，第一物理端口和管理装置。 管理装置确定连接到第一物理端口的第一负载设备的第一类型和第一状态，并且根据第一类型和第一负载设备的第一状态分配通过第一物理端口提供给第一负载设备的电力 。

    Transformerless AC Line Isolator
    4.
    发明申请
    Transformerless AC Line Isolator 审中-公开
    无变压器交流线路隔离器

    公开(公告)号：US20160329830A1

    公开(公告)日：2016-11-10

    申请号：US15148245

    申请日：2016-05-06

    Applicant: Apple Inc.

    Inventor： Asif Hussain ,  Behzad Mohtashemi ,  Manisha P. Pandya ,  Mohammad J. Navabi-Shirazi

    IPC: H02M7/537 ,  H02M1/08

    CPC classification number: H02M7/537 ,  H02M1/08 ,  H02M3/158 ,  H02M2001/0009 ,  H02M2001/0058 ,  Y02B70/1425 ,  Y02B70/1483 ,  Y02B70/1491

    Abstract: Various systems, apparatuses, and methods are disclosed herein, which provide a new power conversion topology for isolated systems that does not include a transformer. Embodiments of the inventive systems comprise: a switching system utilizing high voltage, low leakage switches, e.g., Silicon Carbide (SiC) MOS-FETs; a power source; an inductor and a capacitor operating as a link stage resonant LC circuit; and a load. The switching system may be configured to be controlled in a synchronized ‘four phase’ control loop process, wherein the input switches are prevented from being closed at the same time as the output switches, thereby providing electrical isolation between the input power source and the load—without the use of a transformer. The techniques disclosed herein are applicable to any number of isolated systems that supply power to electronic systems such as: digital cameras, mobile phones, watches, personal data assistants (PDAs), portable music players, displays, and computers.

    Abstract translation: 本文公开了各种系统，装置和方法，其为不包括变压器的隔离系统提供新的功率转换拓扑。 本发明系统的实施例包括：利用高电压，低泄漏开关（例如碳化硅（SiC））MOS-FET的开关系统; 电源; 作为链路级谐振LC电路的电感器和电容器; 和一个负载。 开关系统可以被配置为被控制在同步的“四相”控制环路过程中，其中防止输入开关与输出开关同时闭合，从而在输入电源和负载之间提供电隔离 - 不使用变压器。 本文公开的技术适用于向诸如数字照相机，移动电话，手表，个人数据助理（PDA），便携式音乐播放器，显示器和计算机之类的电子系统供电的任何数量的隔离系统。

    SHORT CIRCUIT PROTECTION
    5.
    发明申请
    SHORT CIRCUIT PROTECTION 有权
    短路保护

    公开(公告)号：US20140139143A1

    公开(公告)日：2014-05-22

    申请号：US13940181

    申请日：2013-07-11

    Applicant: Apple Inc.

    Inventor： Mohammad J. Navabi-Shirazi ,  Asif Hussain ,  Jingdong Chen ,  Manisha P. Pandya

    IPC: H05B33/08

    CPC classification number: H05B33/0887 ,  G06F1/26 ,  H02M3/156 ,  H02M2001/0025 ,  H05B33/0815 ,  H05B33/0884 ,  Y02B20/341

    Abstract: A measured voltage drop across a power-line transistor is used as a sensing element to measure the current and detect an over-current condition for an LED backlight system. An over-current or short condition is detected when the measured voltage drop exceeds a threshold. Accurate detection of the over-current condition is achieved by calibrating the RDS-ON (i.e., internal resistance between drain and source, when transistor is on) of the power-line transistor. In one embodiment, the calibration of RDS-ON is performed by ramping down the threshold from an initial value and using the tripped threshold to determine the actual value for RDS-ON. In another embodiment, the calibration of RDS-ON is performed by using two thresholds, a first threshold to calibrate RDS-ON and a second threshold to detect the over-current condition.

    Abstract translation: 电力线晶体管两端的测量电压降被用作传感元件，以测量电流并检测LED背光系统的过电流状态。 当测量的电压降超过阈值时，检测到过电流或短路状况。 通过校准电源线晶体管的RDS-ON（即，在晶体管导通时漏极和源极之间的内部电阻）来实现过电流状态的精确检测。 在一个实施例中，RDS-ON的校准是通过从初始值降低阈值并使用跳闸阈值来确定RDS-ON的实际值来执行的。 在另一个实施例中，通过使用两个阈值来执行RDS-ON的校准，第二阈值是用于校准RDS-ON的第一阈值和用于检测过电流状态的第二阈值。

    SYSTEMS AND METHODS FOR LIGHT-LOAD EFFICIENCY IN DISPLAYS
    6.
    发明申请
    SYSTEMS AND METHODS FOR LIGHT-LOAD EFFICIENCY IN DISPLAYS 有权
    显示器中轻负载效率的系统和方法

    公开(公告)号：US20140132641A1

    公开(公告)日：2014-05-15

    申请号：US13673695

    申请日：2012-11-09

    Applicant: APPLE INC.

    Inventor： Asif Hussain ,  Jingdong Chen ,  Manisha P. Pandya ,  Mohammad J. Navabi-Shirazi

    IPC: G09G5/10

    CPC classification number: G09G5/10 ,  G09G3/3406 ,  G09G2300/0426 ,  G09G2320/0233

    Abstract: Systems and methods for light-load efficiency in displays may include a backlight driver circuit that may adjust a gate drive voltage provided to a gate of a metal-oxide-semiconductor field-effect transistor (MOSFET) in the boost converter based on the load conditions of light-emitting diodes used to illuminate the display panel. The backlight driver circuit may also switch between two different voltage sources to further broaden a range of gate drive voltages available to drive the gate of the MOSFET in the boost converter. As a result, the backlight driver circuit may decrease gate drive losses associated with the MOSFET, thereby increasing the efficiency of the boost converter.

    Abstract translation: 显示器中轻负载效率的系统和方法可以包括背光驱动器电路，其可以基于负载条件来调节提供给升压转换器中的金属氧化物半导体场效应晶体管（MOSFET）的栅极的栅极驱动电压 的用于照亮显示面板的发光二极管。 背光驱动器电路还可以在两个不同的电压源之间切换，以进一步扩大可用于驱动升压转换器中的MOSFET的栅极的栅极驱动电压的范围。 结果，背光驱动器电路可以减小与MOSFET相关联的栅极驱动损耗，从而提高升压转换器的效率。

    Local display backlighting systems and methods
    9.
    发明授权
    Local display backlighting systems and methods 有权

    公开(公告)号：US10201049B1

    公开(公告)日：2019-02-05

    申请号：US15789885

    申请日：2017-10-20

    Applicant: Apple Inc.

    Inventor： Yanhui Xie ,  Asif Hussain ,  Jingdong Chen ,  Manisha P. Pandya

    IPC: G09G3/36 ,  H05B33/08 ,  G02F1/1335

    Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes. The control circuitry includes a two-dimensional light-emitting diode (LED) array. The control circuitry may include a single LED array operable by a common driver or multiple LED arrays each operable by a dedicated LED matrix driver. Each matrix driver may receive a synchronization signal from a common controller and may include a programmable phase lock loop (PLL) to synchronize each matrix driver to the synchronization signal. The LED array may include multiple strings of LEDs mounted in series along the string. Each LED in each string may include a bypass switch operable to modify the current through that LED by pulse-width modulation.

    Transformerless AC line isolator
    10.
    发明授权
    Transformerless AC line isolator 有权

    公开(公告)号：US10075095B2

    公开(公告)日：2018-09-11

    申请号：US15148245

    申请日：2016-05-06

    Applicant: Apple Inc.

    Inventor： Asif Hussain ,  Behzad Mohtashemi ,  Manisha P. Pandya ,  Mohammad J. Navabi-Shirazi

    IPC: H02M7/44 ,  H02M7/537 ,  H02M1/08 ,  H02M3/158 ,  H02M1/00

    CPC classification number: H02M7/537 ,  H02M1/08 ,  H02M3/158 ,  H02M2001/0009 ,  H02M2001/0058 ,  Y02B70/1425 ,  Y02B70/1483 ,  Y02B70/1491

    Abstract: Various systems, apparatuses, and methods are disclosed herein, which provide a new power conversion topology for isolated systems that does not include a transformer. Embodiments of the inventive systems comprise: a switching system utilizing high voltage, low leakage switches, e.g., Silicon Carbide (SiC) MOS-FETs; a power source; an inductor and a capacitor operating as a link stage resonant LC circuit; and a load. The switching system may be configured to be controlled in a synchronized ‘four phase’ control loop process, wherein the input switches are prevented from being closed at the same time as the output switches, thereby providing electrical isolation between the input power source and the load—without the use of a transformer. The techniques disclosed herein are applicable to any number of isolated systems that supply power to electronic systems such as: digital cameras, mobile phones, watches, personal data assistants (PDAs), portable music players, displays, and computers.

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