公开(公告)号：US10656714B2

公开(公告)日：2020-05-19

申请号：US15939016

申请日：2018-03-28

Applicant: Apple Inc.

Inventor： Christiaan A. Ligtenberg ,  Brett W. Degner ,  Ron A. Hopkinson ,  Asif Hussain ,  Dinesh C. Mathew ,  Mikael M. Silvanto ,  Chang Zhang ,  Zheng Gao ,  Robert Y. Cao ,  Keith J. Hendren ,  Bryan W. Posner ,  Simon R. Lancaster-Larocque ,  Alex J. Lehmann

IPC: G06F3/01 ,  G06F1/16 ,  H03K17/96 ,  H01H13/785 ,  H01H13/85 ,  H01H13/86 ,  G06F3/0488 ,  G06F3/0354 ,  H03K17/94 ,  G06F3/02 ,  G06F3/044 ,  H03K17/98 ,  G06F3/041 ,  G06K9/00 ,  H01L41/09 ,  H01H13/703 ,  H01H13/705 ,  G06F1/26 ,  H01H3/12

Abstract: A portable computer includes a display portion comprising a display and a base portion pivotally coupled to the display portion. The base portion may include a bottom case and a top case, formed from a dielectric material, coupled to the bottom case. The top case may include a top member defining a top surface of the base portion and a sidewall integrally formed with the top member and defining a side surface of the base portion. The portable computer may also include a sensing system including a first sensing system configured to determine a location of a touch input applied to the top surface of the base portion and a second sensing system configured to determine a force of the touch input.

公开(公告)号：US20200105185A1

公开(公告)日：2020-04-02

申请号：US16418882

申请日：2019-05-21

Applicant: Apple Inc.

Inventor： Jingdong Chen ,  Asif Hussain ,  Mohammad J. Navabi-Shirazi ,  Behzad Mohtashemi ,  Yanhui Xie ,  JY Ryoo ,  Ming Gu

IPC: G09G3/32 ,  F21S4/20 ,  H02J1/10

Abstract: A display may have an array of pixels illuminated using a backlight unit. The backlight unit may include multiple strings of light-emitting diodes (LEDs) and a boost converter for providing an output voltage to the multiple LED strings. The boost converter may have a single-phase single-switch, single-phase multi-switch, and/or multi-phase multi-switch configuration, where the switches are turned off when the peak current is reached. When transitioning from a single phase to a dual phase operation, the second (slave) phase current may be slowly ramped up. When transition from the dual phase to the single phase operation, the output voltage may be elevated while slowing ramping down the slave phase current. The boost converter may include a current detection circuit for adjusting the peak current of each phase to balance the average current levels. The boost converter may also include an in-rush current controller configured to sense a short fault.

公开(公告)号：US10069423B2

公开(公告)日：2018-09-04

申请号：US15208333

申请日：2016-07-12

Applicant: Apple Inc.

Inventor： Asif Hussain ,  Nicholas A. Sims

IPC: H02M3/335 ,  H02M1/44 ,  H02M3/28 ,  H02M1/00 ,  H02M3/158

Abstract: A power supply with reduced electromagnetic interference (EMI) is described. This power supply includes cascaded stages with switched-mode power-supply circuits that are switched synchronously during operation by switching signals that have a common fundamental frequency. EMI associated with the power supply is reduced by establishing a phase shift between the switching signals in at least two of the stages.

公开(公告)号：US20180217669A1

公开(公告)日：2018-08-02

申请号：US15939082

申请日：2018-03-28

Applicant: Apple Inc.

Inventor： Christiaan A. Ligtenberg ,  Brett W. Degner ,  Ron A. Hopkinson ,  Asif Hussain ,  Dinesh C. Mathew ,  Mikael M. Silvanto ,  Chang Zhang ,  Zheng Gao ,  Robert Y. Cao

IPC: G06F3/01 ,  G06F1/16 ,  H01H13/85 ,  H01H13/785 ,  H03K17/96

CPC classification number: G06F3/016 ,  G06F1/1616 ,  G06F1/165 ,  G06F1/1662 ,  G06F1/169 ,  G06F1/266 ,  G06F3/017 ,  G06F3/0213 ,  G06F3/0216 ,  G06F3/03547 ,  G06F3/0412 ,  G06F3/0414 ,  G06F3/0416 ,  G06F3/044 ,  G06F3/0488 ,  G06F3/04886 ,  G06F2203/04102 ,  G06F2203/04105 ,  G06F2203/04106 ,  G06K9/00375 ,  H01H3/125 ,  H01H13/703 ,  H01H13/705 ,  H01H13/785 ,  H01H13/85 ,  H01H13/86 ,  H01H2201/036 ,  H01H2215/05 ,  H01H2215/052 ,  H01H2219/002 ,  H01H2219/004 ,  H01H2219/046 ,  H01H2219/056 ,  H01H2223/002 ,  H01L41/09 ,  H03K17/943 ,  H03K17/9622 ,  H03K17/9643 ,  H03K17/9647 ,  H03K17/98 ,  H03K2217/94089 ,  H03K2217/96003 ,  H03K2217/9653

Abstract: A device includes a display portion that includes a display housing and a display within the display housing. The device also includes a base portion flexibly coupled to the display portion and comprising a glass member defining a keyboard region configured to receive user input, a first haptic actuator configured to produce a first haptic output at a first area of the keyboard region, and a second haptic actuator configured to produce a second haptic output at a second area of the keyboard region that is different from the first area.

公开(公告)号：US10034343B2

公开(公告)日：2018-07-24

申请号：US15478549

申请日：2017-04-04

Applicant: Apple Inc.

Inventor： Asif Hussain ,  Jingdong Chen ,  Manisha P. Pandya ,  Adrian E. Sun

IPC: H05B37/00 ,  H05B33/08

Abstract: A backlight driver chip for an electronic device includes an input that receives data corresponding to a brightness of a backlight device. The backlight driver chip also includes correction circuitry that determines an amplitude correction factor based at least in part on the data and the brightness of the backlight device. The correction circuitry also determines a corrected brightness based at least in part on the amplitude correction factor. The backlight driver chip further includes an output that provides a current signal that drives the backlight device, wherein the current signal is based at least in part on the corrected brightness.

公开(公告)号：US20170208661A1

公开(公告)日：2017-07-20

申请号：US15478549

申请日：2017-04-04

Applicant: Apple Inc.

Inventor： Asif Hussain ,  Jingdong Chen ,  Manisha P. Pandya ,  Adrian E. Sun

IPC: H05B33/08

CPC classification number: H05B33/0851 ,  G09G3/3426 ,  H05B33/0818

Abstract: A backlight driver chip for an electronic device includes an input that receives data corresponding to a brightness of a backlight device. The backlight driver chip also includes correction circuitry that determines an amplitude correction factor based at least in part on the data and the brightness of the backlight device. The correction circuitry also determines a corrected brightness based at least in part on the amplitude correction factor. The backlight driver chip further includes an output that provides a current signal that drives the backlight device, wherein the current signal is based at least in part on the corrected brightness.

公开(公告)号：US20160329820A1

公开(公告)日：2016-11-10

申请号：US15148870

申请日：2016-05-06

Applicant: Apple Inc.

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

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33523 ,  H02M1/32 ,  H02M2001/0009

Abstract: Various systems and methods are disclosed herein, which provide isolated systems with an auxiliary, multi-signal digital feedback loop for reporting a plurality of different potential fault conditions in an output system (e.g., output short circuit, output over-voltage, output under-voltage, output over temperature, etc.) to a Primary Controller in an input system. The signals may be sent according to any desired standardized (or proprietary) data transmission protocols. Use of a digital feedback loop allows the signals to be passed to the Primary Controller more quickly than is allowed by traditional analog feedback paths—and while using only a single optocoupler device for the transmission of all fault conditions. 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, monitors, as well as desktop, laptop, and tablet computers.

Abstract translation: 本文公开了各种系统和方法，其为隔离系统提供辅助的多信号数字反馈回路，用于在输出系统中报告多个不同的潜在故障状况（例如，输出短路，输出过压， 电压，输出温度等）输入到输入系统中的主控制器。 可以根据任何期望的标准化（或专有）数据传输协议发送信号。 数字反馈回路的使用允许信号比传统的模拟反馈路径更快地传递到主控制器，而在仅使用单个光耦合器件来传输所有故障条件时。 本文公开的技术适用于向电子系统供电的任何数量的隔离系统，例如：数码相机，移动电话，手表，个人数据助理（PDA），便携式音乐播放器，监视器以及桌面，膝上型计算机和 平板电脑

公开(公告)号：US20160276928A1

公开(公告)日：2016-09-22

申请号：US15050152

申请日：2016-02-22

Applicant: Apple Inc.

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

IPC: H02M3/156

CPC classification number: H02M3/156 ,  H02M2003/1566

Abstract: A power conversion circuit, such as a buck converter/regulator, includes a feedback loop operatively coupling the output voltage to the controller for the switching mechanism. The feedback loop includes an analog error amplifier that sources current to the controller when the output voltage falls below a predetermined reference voltage and sinks current from the controller when the output voltage rises above a predetermined reference voltage. The feedback loop further includes at least one of a sinking boost circuit that sinks additional current from the controller when the output voltage falls below a low voltage threshold or a sourcing boost circuit that sources additional current to the controller when the output voltage rises above a high voltage threshold. The boost circuits can include analog amplifiers, digital comparators, or a combination thereof.

Abstract translation: 诸如降压转换器/调节器的功率转换电路包括将输出电压可操作地耦合到用于开关机构的控制器的反馈回路。 反馈回路包括模拟误差放大器，当输出电压下降到低于预定参考电压时，向输入电压发送电流，并在输出电压升高到高于预定参考电压时从控制器吸收电流。 所述反馈回路还包括吸收升压电路中的至少一个，当所述输出电压下降到低电压阈值以下或者当所述输出电压升高到高于所述控制器的时候向所述控制器提供额外电流的源极升压电路，所述吸收升压电路吸收来自所述控制器的附加电流 电压阈值。 升压电路可以包括模拟放大器，数字比较器或其组合。

公开(公告)号：US09185768B2

公开(公告)日：2015-11-10

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: G06F1/26 ,  H05B33/08 ,  H02M3/156 ,  H02M1/00

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。

公开(公告)号：US08970200B2

公开(公告)日：2015-03-03

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: H02M3/158 ,  H02M3/04 ,  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。