公开(公告)号：WO2018132333A1

公开(公告)日：2018-07-19

申请号：PCT/US2018/012795

申请日：2018-01-08

Applicant: APPLE INC.

Inventor： JAIN, Karan S. ,  DATTA, Supratik ,  VENUGOPAL, Nandita ,  HUSSAIN, Asif

IPC: H02J50/10 ,  H01F27/28

Abstract: A wireless power system includes an electrically-balanced inductor in a transmitter device and an electrically-balanced inductor in a receiver device. The electrically-balanced inductors can be formed by introducing crossovers between radially-adjacent portions of two separate turns of each inductor. The crossovers balance the electric field generated by the transmitter device when transferring power to the receiver device.

公开(公告)号：WO2018106762A1

公开(公告)日：2018-06-14

申请号：PCT/US2017/064832

申请日：2017-12-06

Applicant: APPLE INC.

Inventor： BENTOV, Izhar ,  DATTA, Supratik ,  HUSSAIN, Asif ,  PANDYA, Manisha P.

IPC: H02J50/10 ,  H02J50/40

CPC classification number: H02J50/10 ,  H02J50/40

Abstract: Systems and methods for wireless power transfer to an electronic device. In some embodiments, the disclosed devices includes one or more arrays of transmit coils within a charging surface on which an electronic device is placed for charging. A controller may apply a first alternating signal with a first phase to a first transmit coil, and a second alternating signal with a second phase to a second transmit coil. The offset of phases may produce increased magnetic flux through a receive coil of the electronic device to transfer power more efficiently.

公开(公告)号：EP2749129A1

公开(公告)日：2014-07-02

申请号：EP12787166.3

申请日：2012-09-26

Applicant: Apple Inc.

Inventor： HUSSAIN, Asif ,  PANDYA, Manisha P.

IPC: H05B33/08

CPC classification number: H05B33/0887 ,  Y02B20/341

Abstract: Systems, methods, and devices are provided for detecting short circuits in a backlight assembly without a resistor-based current sensor. For example, an electronic display according to the present disclosure may include a display panel and a backlight assembly to illuminate the display panel. The backlight assembly may drive a backlight element to illuminate the display panel and may include backlight short-circuit detection circuitry. The backlight short-circuit protection circuitry may detect a feedback voltage associated with the backlight element and determine when a short circuit has occurred based at least in part on the feedback voltage.

公开(公告)号：EP3577542A1

公开(公告)日：2019-12-11

申请号：EP18720436.7

申请日：2018-03-28

Applicant: Apple Inc.

Inventor： Ligtenberg, Christiaan A. ,  DEGNER, Brett W. ,  HOPKINS, Ron A. ,  HUSSAIN, Asif ,  MATHEW, Dinesh C. ,  SILVANTO, Mikael ,  ZHANG, Chang ,  CAO, Robert Y. ,  GAO, Zheng ,  LANCASTER-LAROQUE, Simon R. ,  LEHMANN, Alex J. ,  POSNER, Bryan W. ,  HENDREN, Keith J.

IPC: G06F3/01 ,  G06F3/02 ,  G06F3/0354 ,  G06F3/041 ,  G06F3/044 ,  G06F3/0488 ,  G06F1/16

公开(公告)号：WO2019027691A1

公开(公告)日：2019-02-07

申请号：PCT/US2018/042936

申请日：2018-07-19

Applicant: APPLE INC.

Inventor： XIE, Yanhui ,  HUSSAIN, Asif ,  CHEN, Jingdong ,  PANDYA, Manisha P.

IPC: G09G3/34

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.

公开(公告)号：WO2018236460A1

公开(公告)日：2018-12-27

申请号：PCT/US2018/028026

申请日：2018-04-17

Applicant: APPLE INC.

Inventor： RYOO, Ji Yeoul ,  HUSSAIN, Asif ,  CHEN, Jingdong ,  NAVABI-SHIRAZI, Mohammad J. ,  XIE, Yanhui

IPC: G09G3/34 ,  G09G3/36

Abstract: Aspects of the subject technology relate to display circuitry such as backlight control circuitry for operating parallel strings of light-emitting diodes (LEDs). A voltage supply circuit of the backlight control circuitry provides a common supply voltage to the strings of LEDs. Headroom control circuitry samples a residual voltage at the end of each string, determines a minimum of the residual voltages, and provides feedback, based on the determined minimum voltage, to the voltage supply circuit. A headroom control feedback loop may be provided including sampling lines coupled to the second end of each string of LEDs for sampling a residual voltage of each string. Headroom control circuitry may modify the supply voltage based on the minimum residual voltage. Sample-and-hold circuitry may be provided that holds the sampled residual voltages until the voltage supply circuit is ready for an update.

公开(公告)号：WO2016179515A1

公开(公告)日：2016-11-10

申请号：PCT/US2016/031254

申请日：2016-05-06

Applicant: APPLE INC.

Inventor： HUSSAIN, Asif ,  MOHTASHEMI, Behzad ,  PANDYA, Manisha, P. ,  NAVABI-SHIRAZI, Mohammad, J.

IPC: H02M3/158 ,  H02M1/08 ,  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.

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电路工作的电感器和电容器; 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。

公开(公告)号：WO2020068305A1

公开(公告)日：2020-04-02

申请号：PCT/US2019/047408

申请日：2019-08-21

Applicant: APPLE INC.

Inventor： CHEN, Jingdong ,  HUSSAIN, Asif ,  NAVABI-SHIRAZI, Mohammad, J. ,  MOHTASHEMI, Behzad ,  XIE, Yanhui

IPC: H05B33/08 ,  H05B37/03

Abstract: A display may have display layers that form an array of pixels. The array of pixels may be illuminated using a backlight unit. The backlight unit may include multiple strings of light-emitting diodes (LEDs). The multiple LED strings may be controlled by one or more backlight driver integrated circuits (ICs). In a multi-driver IC architecture, an enable signal may be used to set a desired phase delay between the multiple ICs. One or more of the LED strings may exhibit a short fault. Depending on the number of faulty LED strings, the backlight unit can selectively throttle the maximum brightness of the display. The LED strings may receive an output voltage from a DC/DC converter and may be driven using a current driver. The DC/DC converter may be controlled by a headroom feedforward control circuit to ensure sufficient headroom for the current driver while suppressing acoustic noise.

公开(公告)号：WO2019035875A1

公开(公告)日：2019-02-21

申请号：PCT/US2018/000139

申请日：2018-08-15

Applicant: APPLE INC.

Inventor： NAVABI-SHIRAZI, Mohammad, J. ,  ASCORRA, Alejandro, Lara ,  HUSSAIN, Asif ,  RYOO, Ji, Yeoul ,  CHEN, Jingdong ,  QI, Jun ,  PANDYA, Manisha, P. ,  XIE, Yanhui

IPC: G09G3/34 ,  H05B33/08

Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes. The control circuitry may operate a light-emitting diode using a multi-peak pulse-width- modulation signal. The control circuitry may include a multi-stage driver having a relatively larger driver stage for providing a direct current through a light-emitting diode and a relatively smaller driver stage configured to cooperate with a pulse-width-modulation controller to pulse-width-modulate a current through the light-emitting diode.

公开(公告)号：WO2014099118A1

公开(公告)日：2014-06-26

申请号：PCT/US2013/065080

申请日：2013-10-15

Applicant: APPLE INC.

Inventor： HUSSAIN, Asif ,  NAVABI-SHIRAZI, Mohammad J. ,  CHEN, Jingdong ,  PANDYA, Manisha P.

IPC: G06F3/02

CPC classification number: H01H13/83 ,  G06F3/0202

Abstract: Systems, devices, and methods for a shared matrix 48 of shared row pins 72 and/or column pins 76 between a first array of keys and a second array of lights of a keyboard. A keyboard controller addresses the first array of keys 38 and the second array of lights 62 during a scanning period using the shared row pins 72 and/or column pins 76. Each key 38 is backlit by one or more lights 62 of the second array of lights 62 that may be individually controlled. The keyboard controller 56 may drive the desired lights 62 of a respective row while detecting key presses of the same row during the row interval using the shared row pins 72 and/or column pins 76. In some embodiments, the keyboard controller 56 may drive the desired lights 62 of a row during driving interval of the row interval, and scan the keys 38 of the row separately during a sensing interval of the row interval.

Abstract translation: 用于共享行引脚72和/或列引脚76的共享矩阵48在第一数组键和第二阵列的键盘之间的系统，装置和方法。 键盘控制器在扫描周期期间使用共享的行引脚72和/或列引脚76来寻址第一阵列的键38和第二阵列的光62.每个键38由第二阵列的一个或多个光62 灯62可以单独控制。 键盘控制器56可以使用共享的行引脚72和/或列引脚76在行间隔期间检测同一行的按键的同时驱动相应行的所需光62.在一些实施例中，键盘控制器56可以驱动 在行间隔的驱动间隔期间，所需的灯62为一行，并且在行间隔的感测间隔期间分别扫描该行的键38。