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公开(公告)号：US08933643B2
公开(公告)日：2015-01-13
申请号：US13659888
申请日：2012-10-24
Applicant: Apple Inc.
Inventor： Alejandro Lara Ascorra , Shimon Elkayam , Asif Hussain , Brad Lee Patton , Steven J. Sfarzo , Eric G. Smith
IPC: H05B37/02
CPC classification number: H05B33/0842
Abstract: One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an EEPROM to hardware registers prior to regular operation. A second method also transfers data from an EEPROM to registers. However, hardware registers can be overwritten with data accepted from a control bus, prior to regular operation. A keyboard driver IC can detect the presence or absence of a cable to an LED. If the cable is absent, the driver IC will not supply power for the LED. One embodiment of a keyboard and display backlight control system can be configured to allow substantially independent operation.
Abstract translation: 显示器背光驱动器集成电路的一个实施例可被配置为以至少两种不同的方式进行操作。 第一种方法是在正常操作之前将数据从EEPROM传输到硬件寄存器。 第二种方法还将数据从EEPROM传输到寄存器。 但是，在正常操作之前，硬件寄存器可以被从控制总线接受的数据覆盖。 键盘驱动器IC可以检测到LED的电缆的存在或不存在。 如果电缆不存在，驱动器IC将不会为LED供电。 键盘和显示器背光控制系统的一个实施例可以被配置为允许基本独立的操作。
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公开(公告)号：US08928246B2
公开(公告)日：2015-01-06
申请号：US13659885
申请日：2012-10-24
Applicant: Apple Inc.
Inventor： Alejandro Lara Ascorra , Brad Lee Patton , Shimon Elkayam
IPC: G05F1/00
CPC classification number: H05B33/0842
Abstract: One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an EEPROM to hardware registers prior to regular operation. A second method also transfers data from an EEPROM to registers. However, hardware registers can be overwritten with data accepted from a control bus, prior to regular operation. A keyboard driver IC can detect the presence or absence of a cable to an LED. If the cable is absent, the driver IC will not supply power for the LED. One embodiment of a keyboard and display backlight control system can be configured to allow substantially independent operation.
Abstract translation: 显示器背光驱动器集成电路的一个实施例可被配置为以至少两种不同的方式进行操作。 第一种方法是在正常操作之前将数据从EEPROM传输到硬件寄存器。 第二种方法还将数据从EEPROM传输到寄存器。 但是，在正常操作之前，硬件寄存器可以被从控制总线接受的数据覆盖。 键盘驱动器IC可以检测到LED的电缆的存在或不存在。 如果电缆不存在，驱动器IC将不会为LED供电。 键盘和显示器背光控制系统的一个实施例可以被配置为允许基本独立的操作。
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公开(公告)号：US20220061135A1
公开(公告)日：2022-02-24
申请号：US17238851
申请日：2021-04-23
Applicant: Apple Inc.
Inventor： Ming Gu , Yanhui Xie , Jingdong Chen , Asif Hussain , Behzad Mohtashemi , Mohammad Jafar Navabi-Shirazi , Linda A. Kamas , Alejandro Lara Ascorra
IPC: H05B45/14 , H05B45/325 , G09G3/34
Abstract: Aspects of the subject technology relate to electronic devices having a display. The display includes a channel of light emitting diodes (LEDs) having controllable brightness levels and control circuitry coupled to the channel of LEDs. The control circuitry provides a pulse width modulated (PWM) signal having a duty cycle to control the brightness levels. An adaptive headroom control circuitry is configured to sense a headroom voltage signal for the channel of LEDs and apply a first time period for blanking the headroom voltage signal during the first time period that is associated with a settling time for the headroom voltage signal.
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公开(公告)号：US20190215924A1
公开(公告)日：2019-07-11
申请号：US16353896
申请日：2019-03-14
Applicant: Apple Inc.
Inventor： Mohammad J. Navabi-Shirazi , Alejandro Lara Ascorra , Asif Hussain , Ji Yeoul Ryoo , Jingdong Chen , Jun Qi , Manisha P. Pandya , Yanhui Xie
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.
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公开(公告)号：US11798462B2
公开(公告)日：2023-10-24
申请号：US17507717
申请日：2021-10-21
Applicant: APPLE INC.
Inventor： Mohammad J. Navabi-Shirazi , Ming Gu , Alejandro Lara Ascorra , James E. Brown
CPC classification number: G09G3/32 , G09G5/10 , G09G2320/064 , G09G2360/142 , G09G2360/147
Abstract: Light emitting diode display panels with an open loop amplifier resulting in better brightness accuracy and matching between multiple light emitting diode strings.
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Patent Agency Ranking
公开(公告)号：US20220130327A1
公开(公告)日：2022-04-28
申请号：US17507717
申请日：2021-10-21
Applicant: APPLE INC.
Inventor： Mohammad J. Navabi-Shirazi , Ming Gu , Alejandro Lara Ascorra , James E. Brown
Abstract: Light emitting diode display panels with an open loop amplifier resulting in better brightness accuracy and matching between multiple light emitting diode strings.
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公开(公告)号：US09013113B2
公开(公告)日：2015-04-21
申请号：US13659890
申请日：2012-10-24
Applicant: Apple Inc.
Inventor： Alejandro Lara Ascorra , Eric G. Smith , Steven J. Sfarzo
CPC classification number: H05B33/0842
Abstract: One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an EEPROM to hardware registers prior to regular operation. A second method also transfers data from an EEPROM to registers. However, hardware registers can be overwritten with data accepted from a control bus, prior to regular operation. A keyboard driver IC can detect the presence or absence of a cable to an LED. If the cable is absent, the driver IC will not supply power for the LED. One embodiment of a keyboard and display backlight control system can be configured to allow substantially independent operation.
Abstract translation: 显示器背光驱动器集成电路的一个实施例可被配置为以至少两种不同的方式进行操作。 第一种方法是在正常操作之前将数据从EEPROM传输到硬件寄存器。 第二种方法还将数据从EEPROM传输到寄存器。 但是，在正常操作之前，硬件寄存器可以被从控制总线接受的数据覆盖。 键盘驱动器IC可以检测到LED的电缆的存在或不存在。 如果电缆不存在，驱动器IC将不会为LED供电。 键盘和显示器背光控制系统的一个实施例可以被配置为允许基本独立的操作。
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公开(公告)号：US20130278171A1
公开(公告)日：2013-10-24
申请号：US13659888
申请日：2012-10-24
Applicant: APPLE INC.
Inventor： Alejandro Lara Ascorra , Shimon Elkayam , Asif Hussain , Brad Lee Patton , Steven J. Sfarzo , Eric G. Smith
IPC: H05B37/02
CPC classification number: H05B33/0842
Abstract: One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an EEPROM to hardware registers prior to regular operation. A second method also transfers data from an EEPROM to registers. However, hardware registers can be overwritten with data accepted from a control bus, prior to regular operation. A keyboard driver IC can detect the presence or absence of a cable to an LED. If the cable is absent, the driver IC will not supply power for the LED. One embodiment of a keyboard and display backlight control system can be configured to allow substantially independent operation.
Abstract translation: 显示器背光驱动器集成电路的一个实施例可被配置为以至少两种不同的方式进行操作。 第一种方法是在正常操作之前将数据从EEPROM传输到硬件寄存器。 第二种方法还将数据从EEPROM传输到寄存器。 但是，在正常操作之前，硬件寄存器可以被从控制总线接受的数据覆盖。 键盘驱动器IC可以检测到LED的电缆的存在或不存在。 如果电缆不存在，驱动器IC将不会为LED供电。 键盘和显示器背光控制系统的一个实施例可以被配置为允许基本独立的操作。
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公开(公告)号：US10957500B2
公开(公告)日：2021-03-23
申请号：US15211818
申请日：2016-07-15
Applicant: Apple Inc.
Inventor： Alejandro Lara Ascorra , Qian Zhang , Thai Q. La
Abstract: Systems and methods for selective keyboard backlighting with reduced driver circuitry are provided. In one example embodiment, a method includes, inter alia, simultaneously controlling, with a control signal, an output of a first light emitting element that illuminates only one key of a plurality of keys of a keyboard and an output of a second light emitting element that illuminates only one key of the plurality of keys, and maintaining, with a current mirror circuit, uniformity between the output of the first light emitting element and the output of the second light emitting element.
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公开(公告)号：US10728969B2
公开(公告)日：2020-07-28
申请号：US16353896
申请日：2019-03-14
Applicant: Apple Inc.
Inventor： Mohammad J. Navabi-Shirazi , Alejandro Lara Ascorra , Asif Hussain , Ji Yeoul Ryoo , Jingdong Chen , Jun Qi , Manisha P. Pandya , Yanhui Xie
IPC: H05B33/08 , H05B45/10 , G09G3/34 , H05B45/37 , H05B45/46 , H05B45/395 , G02F1/1335 , G02F1/13357 , G02F1/1343
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.
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