公开(公告)号：US08279144B2

公开(公告)日：2012-10-02

申请号：US12183492

申请日：2008-07-31

Applicant: Bin Zhao ,  Jack W. Cornish ,  Brian B. Horng ,  Andrew M Kameya ,  Jan Krellner ,  Kenneth C. Kwok ,  Victor K. Lee ,  Weizhuang W. Xin

Inventor： Bin Zhao ,  Jack W. Cornish ,  Brian B. Horng ,  Andrew M Kameya ,  Jan Krellner ,  Kenneth C. Kwok ,  Victor K. Lee ,  Weizhuang W. Xin

IPC: G09G3/32

CPC classification number: H05B33/0815 ,  H05B33/0827 ,  H05B33/086

Abstract: Disclosed are example techniques for frame-based power management in a light emitting diode (LED) system having a plurality of LED strings. A voltage source provides an output voltage to drive the LED strings. An LED driver generates a frame timing reference representative of the frame rate or display timing of a series of image frames to be displayed via the LED system. An update reference is generated from the frame timing reference. The LED driver monitors one or more operating parameters of the LED system. In response to update triggers marked by the update reference, the LED driver adjusts the output voltage of the voltage source based on the status of each of the one or more monitored operating parameters (either from the previous update period or determined in response to the update trigger), thereby synchronizing the updating of the output voltage to the frame rate (or a virtual approximation of the frame rate) of the video being displayed.

Abstract translation: 公开了具有多个LED串的发光二极管（LED）系统中用于基于帧的电源管理的示例技术。 电压源提供输出电压来驱动LED串。 LED驱动器生成表示要通过LED系统显示的一系列图像帧的帧速率或显示定时的帧定时参考。 从帧定时参考生成更新参考。 LED驱动器监视LED系统的一个或多个操作参数。 响应于由更新参考标记的更新触发器，LED驱动器基于一个或多个监视的操作参数中的每一个的状态来调节电压源的输出电压（从先前的更新周期或响应于更新确定） 触发），从而将输出电压的更新同步于正在显示的视频的帧速率（或帧速率的虚拟近似）。

公开(公告)号：US08599915B2

公开(公告)日：2013-12-03

申请号：US13025201

申请日：2011-02-11

Applicant: Bin Zhao ,  Jack W. Cornish ,  Andrew M. Kameya ,  Weizhuang W. Xin

Inventor： Bin Zhao ,  Jack W. Cornish ,  Andrew M. Kameya ,  Weizhuang W. Xin

IPC: H03K7/08 ,  H03K9/08

CPC classification number: H05B33/0827 ,  G09G3/3406 ,  G09G2320/064

Abstract: First information is received at a first pulse width modulation (PWM) module responsive to a chip select signal being asserted at a chip select input of a communication bus of the first PWM module during a first time. The first information is latched at a control register of the first PWM module in response to a first logic transition of the chip select signal. A first PWM signal is provided at a first output of the first PWM module beginning a predetermined amount of time after the first logic transition of the chip select signal, the first PWM signal generated by the first PWM module based upon the first information.

Abstract translation: 响应于在第一时间期间在第一PWM模块的通信总线的芯片选择输入端被断言的芯片选择信号，第一脉冲宽度调制（PWM）模块接收第一信息。 响应于芯片选择信号的第一逻辑转换，第一信息被锁存在第一PWM模块的控制寄存器中。 第一PWM信号设置在第一PWM模块的第一输出处，在芯片选择信号的第一逻辑转换，基于第一信息由第一PWM模块产生的第一PWM信号之后开始预定的时间量。

公开(公告)号：US20120207205A1

公开(公告)日：2012-08-16

申请号：US13025201

申请日：2011-02-11

Applicant: Bin Zhao ,  Jack W. Cornish ,  Andrew M. Kameya ,  Weizhuang W. Xin

Inventor： Bin Zhao ,  Jack W. Cornish ,  Andrew M. Kameya ,  Weizhuang W. Xin

IPC: H03K9/08

CPC classification number: H05B33/0827 ,  G09G3/3406 ,  G09G2320/064

Abstract: First information is received at a first pulse width modulation (PWM) module responsive to a chip select signal being asserted at a chip select input of a communication bus of the first PWM module during a first time. The first information is latched at a control register of the first PWM module in response to a first logic transition of the chip select signal. A first PWM signal is provided at a first output of the first PWM module beginning a predetermined amount of time after the first logic transition of the chip select signal, the first PWM signal generated by the first PWM module based upon the first information.

Abstract translation: 响应于在第一时间期间在第一PWM模块的通信总线的芯片选择输入端被断言的芯片选择信号，第一脉冲宽度调制（PWM）模块接收第一信息。 响应于芯片选择信号的第一逻辑转换，第一信息被锁存在第一PWM模块的控制寄存器中。 第一PWM信号设置在第一PWM模块的第一输出处，在芯片选择信号的第一逻辑转换，基于第一信息由第一PWM模块产生的第一PWM信号之后开始预定的时间量。

公开(公告)号：US20100156315A1

公开(公告)日：2010-06-24

申请号：US12340985

申请日：2008-12-22

Applicant: Bin Zhao ,  Jack W. Cornish ,  Brian B. Horng ,  Andrew M. Kameya ,  Jan Krellner ,  Kenneth C. Kwok ,  Victor K. Lee ,  Weizhuang W. Xin

Inventor： Bin Zhao ,  Jack W. Cornish ,  Brian B. Horng ,  Andrew M. Kameya ,  Jan Krellner ,  Kenneth C. Kwok ,  Victor K. Lee ,  Weizhuang W. Xin

IPC: H05B41/36

CPC classification number: H05B33/0818 ,  H05B33/0827 ,  H05B33/0851

Abstract: Power management in a light emitting diode (LED) system having a plurality of LED strings is disclosed. A voltage source provides an output voltage to drive a plurality of LED strings. An LED driver implements a feedback mechanism to monitor the tail voltages of the active LED strings to identify the minimum tail voltage and adjust the output voltage of the voltage source based on the lowest tail voltage. A loop calibration module of the LED driver calibrates the feedback mechanism of the LED driver based on a relationship between a digital code value used to generate a particular output voltage and another digital code value generated based on the minimum tail voltage resulting from the particular output voltage.

Abstract translation: 公开了具有多个LED串的发光二极管（LED）系统中的电源管理。 电压源提供输出电压以驱动多个LED串。 LED驱动器实现反馈机制来监测有源LED串的尾部电压以识别最小尾电压，并且基于最低的尾部电压来调节电压源的输出电压。 LED驱动器的回路校准模块基于用于产生特定输出电压的数字代码值与基于由特定输出电压产生的最小尾部电压产生的另一数字代码值之间的关系来校准LED驱动器的反馈机制 。

公开(公告)号：US20100026203A1

公开(公告)日：2010-02-04

申请号：US12183492

申请日：2008-07-31

Applicant: Bin Zhao ,  Jack W. Cornish ,  Brian B. Horng ,  Andrew M. Kameya ,  Jan Krellner ,  Kenneth C. Kwok ,  Victor K. Lee ,  Weizhuang W. Xin

Inventor： Bin Zhao ,  Jack W. Cornish ,  Brian B. Horng ,  Andrew M. Kameya ,  Jan Krellner ,  Kenneth C. Kwok ,  Victor K. Lee ,  Weizhuang W. Xin

IPC: H05B33/00

CPC classification number: H05B33/0815 ,  H05B33/0827 ,  H05B33/086

Abstract: Disclosed are example techniques for frame-based power management in a light emitting diode (LED) system having a plurality of LED strings. A voltage source provides an output voltage to drive the LED strings. An LED driver generates a frame timing reference representative of the frame rate or display timing of a series of image frames to be displayed via the LED system. An update reference is generated from the frame timing reference. The LED driver monitors one or more operating parameters of the LED system. In response to update triggers marked by the update reference, the LED driver adjusts the output voltage of the voltage source based on the status of each of the one or more monitored operating parameters (either from the previous update period or determined in response to the update trigger), thereby synchronizing the updating of the output voltage to the frame rate (or a virtual approximation of the frame rate) of the video being displayed.

Abstract translation: 公开了具有多个LED串的发光二极管（LED）系统中用于基于帧的电源管理的示例技术。 电压源提供输出电压来驱动LED串。 LED驱动器生成表示要通过LED系统显示的一系列图像帧的帧速率或显示定时的帧定时参考。 从帧定时参考生成更新参考。 LED驱动器监视LED系统的一个或多个操作参数。 响应于由更新参考标记的更新触发器，LED驱动器基于一个或多个监视的操作参数中的每一个的状态来调节电压源的输出电压（从先前的更新周期或响应于更新确定） 触发），从而将输出电压的更新同步于正在显示的视频的帧速率（或帧速率的虚拟近似）。

公开(公告)号：US08035315B2

公开(公告)日：2011-10-11

申请号：US12340985

申请日：2008-12-22

Applicant: Bin Zhao ,  Jack W. Cornish ,  Brian B. Horng ,  Andrew M. Kameya ,  Jan Krellner ,  Kenneth C. Kwok ,  Victor K. Lee ,  Weizhuang W. Xin

Inventor： Bin Zhao ,  Jack W. Cornish ,  Brian B. Horng ,  Andrew M. Kameya ,  Jan Krellner ,  Kenneth C. Kwok ,  Victor K. Lee ,  Weizhuang W. Xin

IPC: H05B37/02 ,  G09G5/00

CPC classification number: H05B33/0818 ,  H05B33/0827 ,  H05B33/0851

Abstract: Power management in a light emitting diode (LED) system having a plurality of LED strings is disclosed. A voltage source provides an output voltage to drive a plurality of LED strings. An LED driver implements a feedback mechanism to monitor the tail voltages of the active LED strings to identify the minimum tail voltage and adjust the output voltage of the voltage source based on the lowest tail voltage. A loop calibration module of the LED driver calibrates the feedback mechanism of the LED driver based on a relationship between a digital code value used to generate a particular output voltage and another digital code value generated based on the minimum tail voltage resulting from the particular output voltage.

Abstract translation: 公开了具有多个LED串的发光二极管（LED）系统中的电源管理。 电压源提供输出电压以驱动多个LED串。 LED驱动器实现反馈机制来监测有源LED串的尾部电压以识别最小尾电压，并且基于最低的尾部电压来调节电压源的输出电压。 LED驱动器的回路校准模块基于用于产生特定输出电压的数字代码值与基于由特定输出电压产生的最小尾部电压产生的另一数字代码值之间的关系来校准LED驱动器的反馈机制 。