公开(公告)号：US08581828B2

公开(公告)日：2013-11-12

申请号：US12772067

申请日：2010-04-30

申请人： Zhiyu Yang ,  Kien Vi ,  Dilip S ,  Tushar Dhayagude

发明人： Zhiyu Yang ,  Kien Vi ,  Dilip S ,  Tushar Dhayagude

IPC分类号： G09G3/36

CPC分类号： G09G3/342 ,  G09G3/3406 ,  G09G2320/064 ,  H05B33/0818 ,  H05B33/0827 ,  H05B33/0851 ,  Y02B20/346

摘要： System(s) and method(s) are provided for power management in an electronic display via compensation of a power source of a light-emitting-diode (LED) backlighting system. A compensation feedback loop includes a load-aware controller that receives the load condition from a dimming controller and supplies a control signal to the power source. An efficiency regulator functionally connected the backlight circuitry closes the compensation feedback loop and provides an input signal to the load-aware controller. The dimming controller implements phase-shifted pulse-modulation dimming, which based on duty cycle can establish a dimming equilibrium with two load conditions. The load aware controller includes a set of compensation blocks arranged in parallel, with a single compensation block connected to the input signal and that provides the control signal. A selector component in the load aware controller determines a compensation block to be connected to the compensation feedback loop based on the received load condition.

摘要翻译： 通过补偿发光二极管（LED）背光系统的电源，为电子显示器中的电源管理提供系统和方法。 补偿反馈回路包括负载感知控制器，其从调光控制器接收负载状况，并向控制电源提供控制信号。 功能上连接到背光电路的效率调节器关闭补偿反馈回路并向负载感知控制器提供输入信号。 调光控制器实现相移脉冲宽度调制调光，其基于占空比可以在两个负载条件下建立调光平衡。 负载感知控制器包括并联布置的一组补偿块，单个补偿块连接到输入信号并提供控制信号。 负载感知控制器中的选择器部件基于接收的负载条件确定要连接到补偿反馈回路的补偿块。

公开(公告)号：US20110267375A1

公开(公告)日：2011-11-03

申请号：US12772067

申请日：2010-04-30

申请人： Zhiyu Yang ,  Kien Vi ,  Dilip S. ,  Tushar Dhayagude

发明人： Zhiyu Yang ,  Kien Vi ,  Dilip S. ,  Tushar Dhayagude

IPC分类号： G09G5/10 ,  H05B37/02

CPC分类号： G09G3/342 ,  G09G3/3406 ,  G09G2320/064 ,  H05B33/0818 ,  H05B33/0827 ,  H05B33/0851 ,  Y02B20/346

摘要： System(s) and method(s) are provided for power management in an electronic display via compensation of a power source of a light-emitting-diode (LED) backlighting system. A compensation feedback loop includes a load-aware controller that receives the load condition from a dimming controller and supplies a control signal to the power source. An efficiency regulator functionally connected the backlight circuitry closes the compensation feedback loop and provides an input signal to the load-aware controller. The dimming controller implements phase-shifted pulse-modulation dimming, which based on duty cycle can establish a dimming equilibrium with two load conditions. The load aware controller includes a set of compensation blocks arranged in parallel, with a single compensation block connected to the input signal and that provides the control signal. A selector component in the load aware controller determines a compensation block to be connected to the compensation feedback loop based on the received load condition.

摘要翻译： 通过补偿发光二极管（LED）背光系统的电源，为电子显示器中的电力管理提供系统和方法。 补偿反馈回路包括负载感知控制器，其从调光控制器接收负载状况，并向控制电源提供控制信号。 功能上连接到背光电路的效率调节器关闭补偿反馈回路并向负载感知控制器提供输入信号。 调光控制器实现相移脉冲调制调光，其基于占空比可以在两个负载条件下建立调光平衡。 负载感知控制器包括并联布置的一组补偿块，单个补偿块连接到输入信号并提供控制信号。 负载感知控制器中的选择器部件基于接收的负载条件确定要连接到补偿反馈回路的补偿块。

公开(公告)号：US08339174B2

公开(公告)日：2012-12-25

申请号：US12712930

申请日：2010-02-25

申请人： Zhiyu Yang ,  Dilip S ,  Tushar Dhayagude

发明人： Zhiyu Yang ,  Dilip S ,  Tushar Dhayagude

IPC分类号： H03K3/00

CPC分类号： H05B33/0809 ,  H03K3/012 ,  H03K7/08 ,  H05B33/0842

摘要： Systems, circuits and methods for phase-shifting pulse width modulated signal generation are disclosed. In some embodiments, a phase-shifting pulse width modulation circuit is configured to output pulses based on an input pulse width modulated signal. The pulses are staggered relative to one another, and can be received by a light-emitting diode driver for driving a light-emitting diode string at one or more time periods. The phase-shifting pulse width modulation circuit can include a counter-based programmable delay subcircuit consisting of two counter-based programmable delay blocks.

摘要翻译： 公开了用于相移脉宽调制信号产生的系统，电路和方法。 在一些实施例中，移相脉宽调制电路被配置为基于输入脉宽调制信号输出脉冲。 脉冲相对于彼此交错，并且可以由用于在一个或多个时间段驱动发光二极管串的发光二极管驱动器接收。 相移脉宽调制电路可以包括由两个基于计数器的可编程延迟块组成的基于计数器的可编程延迟子电路。

公开(公告)号：US20110204810A1

公开(公告)日：2011-08-25

申请号：US12712930

申请日：2010-02-25

申请人： Zhiyu Yang ,  Dilip S. ,  Tushar Dhayagude

发明人： Zhiyu Yang ,  Dilip S. ,  Tushar Dhayagude

IPC分类号： H05B41/16 ,  H03K3/00

CPC分类号： H05B33/0809 ,  H03K3/012 ,  H03K7/08 ,  H05B33/0842

摘要： Systems, circuits and methods for phase-shifting pulse width modulated signal generation are disclosed. In some embodiments, a phase-shifting pulse width modulation circuit is configured to output pulses based on an input pulse width modulated signal. The pulses are staggered relative to one another, and can be received by a light-emitting diode driver for driving a light-emitting diode string at one or more time periods. The phase-shifting pulse width modulation circuit can include a counter-based programmable delay subcircuit consisting of two counter-based programmable delay blocks.

摘要翻译： 公开了用于相移脉宽调制信号产生的系统，电路和方法。 在一些实施例中，移相脉宽调制电路被配置为基于输入脉宽调制信号输出脉冲。 脉冲相对于彼此交错，并且可以由用于在一个或多个时间段驱动发光二极管串的发光二极管驱动器接收。 相移脉宽调制电路可以包括由两个基于计数器的可编程延迟块组成的基于计数器的可编程延迟子电路。

公开(公告)号：US20130193859A1

公开(公告)日：2013-08-01

申请号：US13724649

申请日：2012-12-21

申请人： Zhiyu Yang ,  Dilip Sangam ,  Tushar Dhayagude

发明人： Zhiyu Yang ,  Dilip Sangam ,  Tushar Dhayagude

IPC分类号： H05B33/08 ,  H03K3/012

CPC分类号： H05B33/0809 ,  H03K3/012 ,  H03K7/08 ,  H05B33/0842

摘要： Systems, circuits and methods for phase-shifting pulse width modulated signal generation are disclosed. In some embodiments, a phase-shifting pulse width modulation circuit is configured to output pulses based on an input pulse width modulated signal. The pulses are staggered relative to one another, and can be received by a light-emitting diode driver for driving a light-emitting diode string at one or more time periods. The phase-shifting pulse width modulation circuit can include a counter-based programmable delay subcircuit consisting of two counter-based programmable delay blocks.

摘要翻译： 公开了用于相移脉宽调制信号产生的系统，电路和方法。 在一些实施例中，移相脉宽调制电路被配置为基于输入脉宽调制信号输出脉冲。 脉冲相对于彼此交错，并且可以由用于在一个或多个时间段驱动发光二极管串的发光二极管驱动器接收。 相移脉宽调制电路可以包括由两个基于计数器的可编程延迟块组成的基于计数器的可编程延迟子电路。

公开(公告)号：US20100237786A1

公开(公告)日：2010-09-23

申请号：US12649057

申请日：2009-12-29

申请人： Hendrik Santo ,  Matthew D. Schindler ,  Dilip S. ,  Tushar Dhayagude

发明人： Hendrik Santo ,  Matthew D. Schindler ,  Dilip S. ,  Tushar Dhayagude

IPC分类号： H05B37/02

CPC分类号： H05B33/0851 ,  G09G3/342 ,  H05B33/0842

摘要： The present invention relates to circuits and methods for controlling one or more LED strings. The circuit comprises a programmable controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters and use that information to determine the desired drive voltage for the LED strings. The controller is associated with a power supply having power factor correction (PFC) capability. The controller provides the power supply with a control signal indicative of the desired drive voltage for one or more LED strings. The power supply also receives ac voltage and current waveforms as inputs and performs power factor correction and rectified waveforms related to the ac waveforms. The power supply generates the desired drive voltage based on the control signal.

摘要翻译： 本发明涉及用于控制一个或多个LED串的电路和方法。 电路包括耦合到一个或多个检测器的可编程控制器，其中所述一个或多个检测器被配置为检测一个或多个LED或LED驱动器的一个或多个可测量的参数。 控制器被配置为从与一个或多个可测量参数相关的一个或多个检测器接收信息，并使用该信息来确定LED串所需的驱动电压。 控制器与具有功率因数校正（PFC）能力的电源相关联。 控制器为电源提供指示一个或多个LED串的期望驱动电压的控制信号。 电源还接收交流电压和电流波形作为输入，并进行与交流波形相关的功率因数校正和整流波形。 电源根据控制信号产生所需的驱动电压。

公开(公告)号：US20090184904A1

公开(公告)日：2009-07-23

申请号：US12018399

申请日：2008-01-23

申请人： Dilip S. ,  Hendrik Santo ,  Tushar Dhayagude ,  Klen Vi ,  Sean Chen

发明人： Dilip S. ,  Hendrik Santo ,  Tushar Dhayagude ,  Klen Vi ,  Sean Chen

IPC分类号： G09G3/32

CPC分类号： G09G3/3426 ,  G09G3/3413 ,  G09G2310/0237 ,  G09G2310/024 ,  G09G2320/0633 ,  G09G2320/0666 ,  G09G2360/144

摘要： The present invention discloses apparatus and techniques relating to the intelligent control of a display's backlight LED strings. The present invention provides for controlling the display intensity on a region-by-region basis and for adjusting the intensity multiple times within the duration of a frame. The present invention also provides backlight adjustment in a manner that emphasizes certain colors and deemphasizes certain colors. The present invention also provides for adjustment of the backlight based on the ambient temperature.

摘要翻译： 本发明公开了与显示器的背光LED串的智能控制相关的装置和技术。 本发明提供了在逐帧的基础上控制显示强度并且在帧的持续时间内多次调整强度。 本发明还以强调某些颜色并且强调某些颜色的方式提供背光调整。 本发明还提供了基于环境温度来调节背光。

公开(公告)号：US20110175935A1

公开(公告)日：2011-07-21

申请号：US12688742

申请日：2010-01-15

申请人： Dilip S ,  Balaji Venugopal Virajpet ,  Tushar Dhayagude

发明人： Dilip S ,  Balaji Venugopal Virajpet ,  Tushar Dhayagude

IPC分类号： G06F3/038 ,  G09G5/10

CPC分类号： G09G3/3406 ,  G09G3/2022 ,  G09G3/342 ,  G09G3/3426 ,  G09G2310/0237 ,  G09G2310/061 ,  G09G2320/0247 ,  G09G2320/0261 ,  G09G2320/062 ,  G09G2320/064 ,  H05B33/086

摘要： System(s) and method(s) are provided to regulate backlighting in a light emitting diode (LED)-based display through a sequence of alternate pulse-width-modulation (PWM) frame or sub-frame insertions. Alternate PWM frames or sub-frames can be black or non-black. A plurality of pixels in the display is partitioned into at least one zone including one or more rows of pixels; the at least one zone determines sub-frame period based on refresh frequency of the display. A sequence of alternate PWM sub-frames includes at least one alternate sub-frame and at least one normal sub-frame. Alternate PWM frames or alternate PWM sub-frames include a phase delay during which a backlight unit is turned off, and a PWM sequence in which the backlight unit is turned on with a finite duty cycle for the remainder of the PWM frame or sub-frame. A sequence of alternate PWM sub-frames can be configured internally or externally. Internal configuration can be synchronous with a reference signal whereas external configuration relies on external reference signal.

摘要翻译： 提供系统和方法以通过一系列交替的脉冲宽度调制（PWM）帧或子帧插入来调节基于发光二极管（LED）的显示器中的背光。 备用的PWM帧或子帧可以是黑色或非黑色。 显示器中的多个像素被分割成包括一行或多行像素的至少一个区域; 所述至少一个区域基于显示器的刷新频率确定子帧周期。 交替PWM子帧的序列包括至少一个备用子帧和至少一个正常子帧。 替代的PWM帧或交替的PWM子帧包括在其中关闭背光单元的相位延迟以及其中背光单元以PWM帧或子帧的其余部分的有限占空比导通的PWM序列 。 可以在内部或外部配置一系列备用PWM子帧。 内部配置可以与参考信号同步，而外部配置依赖于外部参考信号。

公开(公告)号：US20090315467A1

公开(公告)日：2009-12-24

申请号：US12409088

申请日：2009-03-23

申请人： Matthew Schindler ,  Tushar Dhayagude ,  Hendrik Santo ,  Dilip S

发明人： Matthew Schindler ,  Tushar Dhayagude ,  Hendrik Santo ,  Dilip S

IPC分类号： H05B37/02

CPC分类号： G09G3/342

摘要： The present invention relates to circuits and methods for controlling one or more LED strings. The circuit comprises a programmable controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters and use that information to determine the desired drive voltage for the LED strings. The controller is associated with a power supply having power factor correction (PFC) capability. The controller provides the power supply with a control signal indicative of the desired drive voltage for one or more LED strings. The power supply also receives ac voltage and current waveforms as inputs and performs power factor correction and rectified waveforms related to the ac waveforms. The power supply generates the desired drive voltage based on the control signal.

摘要翻译： 本发明涉及用于控制一个或多个LED串的电路和方法。 电路包括耦合到一个或多个检测器的可编程控制器，其中所述一个或多个检测器被配置为检测一个或多个LED或LED驱动器的一个或多个可测量的参数。 控制器被配置为从与一个或多个可测量参数相关的一个或多个检测器接收信息，并使用该信息来确定LED串所需的驱动电压。 控制器与具有功率因数校正（PFC）能力的电源相关联。 控制器为电源提供指示一个或多个LED串的期望驱动电压的控制信号。 电源还接收交流电压和电流波形作为输入，并进行与交流波形相关的功率因数校正和整流波形。 电源根据控制信号产生所需的驱动电压。

公开(公告)号：US08581810B2

公开(公告)日：2013-11-12

申请号：US12145414

申请日：2008-06-24

申请人： Tushar Dhayagude ,  Hendrik Santo

发明人： Tushar Dhayagude ,  Hendrik Santo

IPC分类号： G09G3/32 ,  G09G5/10

CPC分类号： H05B33/0866 ,  G09G3/342

摘要： The present invention relates to circuits and methods for controlling one or more LEDs or LED drivers. The circuit comprises a programmable decentralized controller coupled to one or more detectors, wherein the one or more detectors are configured to detect one or more measurable parameters of one or more LEDs or LED drivers. The controller is configured to receive information from the one or more detectors related to the one or more measurable parameters. The controller is also configured to adjust one or more controllable parameters until one or more detectors indicate that one or more measurable parameters in one of the LEDs or LED drivers meet a reference condition. The controller is configured to then set one or more of the controllable parameters to operate at a value relative to the value of the controllable parameters at which the reference condition was met.

摘要翻译： 本发明涉及用于控制一个或多个LED或LED驱动器的电路和方法。 电路包括耦合到一个或多个检测器的可编程分散控制器，其中所述一个或多个检测器被配置为检测一个或多个LED或LED驱动器的一个或多个可测量的参数。 控制器被配置为从与一个或多个可测量参数相关的一个或多个检测器接收信息。 控制器还被配置为调整一个或多个可控参数，直到一个或多个检测器指示其中一个LED或LED驱动器中的一个或多个可测量的参数满足参考条件。 控制器被配置为然后将一个或多个可控参数设置为相对于满足参考条件的可控参数的值来操作。