公开(公告)号：US08952620B2

公开(公告)日：2015-02-10

申请号：US14266539

申请日：2014-04-30

Applicant: Jae Hong Jeong ,  Minjong Kim

Inventor： Jae Hong Jeong ,  Minjong Kim

IPC: H05B37/00 ,  H05B33/08

CPC classification number: H05B33/083 ,  H05B33/0806 ,  H05B33/089

Abstract: A driver circuit for driving light emitting diodes (LEDs). The driver circuit includes: a string of LEDs divided into n groups, the n groups of LEDs being electrically connected to each other in series, a downstream end of group m−1 being electrically connected to the upstream end of group m, where m is a positive number equal to or less than n. The driver circuit also includes a plurality of current regulating circuits, each of the current regulating circuits being coupled to the downstream end of a corresponding group at one end and coupled to the ground at the other end and including a sensor amplifier and a cascode having first and second transistors, each sensor amplifier being coupled to a different voltage source for providing a different reference voltage thereto.

Abstract translation: 驱动发光二极管（LED）的驱动电路。 驱动器电路包括：一串LED分为n组，n组LED彼此串联电连接，组m-1的下游端电连接到组m的上游端，其中m为 正数等于或小于n。 驱动器电路还包括多个电流调节电路，每个电流调节电路在一端耦合到对应组的下游端，并在另一端耦合到地，并且包括传感器放大器和具有第一 和第二晶体管，每个传感器放大器耦合到不同的电压源，以向其提供不同的参考电压。

公开(公告)号：US08928254B2

公开(公告)日：2015-01-06

申请号：US14266610

申请日：2014-04-30

Applicant: Jae Hong Jeong ,  Minjong Kim

Inventor： Jae Hong Jeong ,  Minjong Kim

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/083 ,  H05B33/0806 ,  H05B33/089

Abstract: A driver circuit for driving light emitting diodes (LEDs). The driver circuit includes: a string of LEDs divided into n groups, the n groups of LEDs being electrically connected to each other in series, a downstream end of group m−1 being electrically connected to the upstream end of group m, where m is a positive number equal to or less than n. The driver circuit also includes a plurality of current regulating circuits, each of the current regulating circuits being coupled to the downstream end of a corresponding group at one end and coupled to the ground at the other end and including a sensor amplifier and a cascode having first and second transistors, each sensor amplifier being coupled to a different voltage source for providing a different reference voltage thereto.

公开(公告)号：US09504110B2

公开(公告)日：2016-11-22

申请号：US14222543

申请日：2014-03-21

Applicant: Minjong Kim ,  Weifeng Chen ,  Jungung Kim ,  Jae Hong Jeong ,  Kyeongtae Moon

Inventor： Minjong Kim ,  Weifeng Chen ,  Jungung Kim ,  Jae Hong Jeong ,  Kyeongtae Moon

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0845 ,  H05B33/0824 ,  H05B33/083 ,  H05B37/02

Abstract: An AC light system with a control unit for controlling power of an LED is disclosed. According to one embodiment, a driver circuit for driving LEDs has a plurality of current sinks, a first interface configured to receive an AC power from an AC power source, a second interface to a plurality LED groups. The driver circuit further has a third interface configured to receive a control input from a control unit. Each current sink of the plurality of current sinks controls an LED current flowing through a corresponding LED group based on the control input from the control unit.

Abstract translation: 公开了具有用于控制LED功率的控制单元的交流发光系统。 根据一个实施例，用于驱动LED的驱动器电路具有多个电流吸收器，被配置为从AC电源接收AC电力的第一接口，到多个LED组的第二接口。 驱动器电路还具有被配置为从控制单元接收控制输入的第三接口。 多个电流吸收器的每个电流吸收器基于来自控制单元的控制输入来控制流过对应的LED组的LED电流。

公开(公告)号：US20140252968A1

公开(公告)日：2014-09-11

申请号：US14266610

申请日：2014-04-30

Applicant: Jae Hong Jeong ,  Minjong Kim

Inventor： Jae Hong Jeong ,  Minjong Kim

IPC: H05B33/08

CPC classification number: H05B33/083 ,  H05B33/0806 ,  H05B33/089

Abstract: A driver circuit for driving light emitting diodes (LEDs). The driver circuit includes: a string of LEDs divided into n groups, the n groups of LEDs being electrically connected to each other in series, a downstream end of group m-1 being electrically connected to the upstream end of group m, where m is a positive number equal to or less than n. The driver circuit also includes a plurality of current regulating circuits, each of the current regulating circuits being coupled to the downstream end of a corresponding group at one end and coupled to the ground at the other end and including a sensor amplifier and a cascode having first and second transistors, each sensor amplifier being coupled to a different voltage source for providing a different reference voltage thereto.

Abstract translation: 驱动发光二极管（LED）的驱动电路。 驱动器电路包括：一串LED分为n组，n组LED彼此串联电连接，组m-1的下游端电连接到组m的上游端，其中m为 正数等于或小于n。 驱动器电路还包括多个电流调节电路，每个电流调节电路在一端耦合到对应组的下游端，并在另一端耦合到地，并且包括传感器放大器和具有第一 和第二晶体管，每个传感器放大器耦合到不同的电压源，以向其提供不同的参考电压。

公开(公告)号：US08901849B2

公开(公告)日：2014-12-02

申请号：US13528850

申请日：2012-06-21

Applicant: Jae Hong Jeong ,  Minjong Kim

Inventor： Jae Hong Jeong ,  Minjong Kim

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/083 ,  H05B33/0806 ,  H05B33/089

Abstract: A driver circuit for driving light emitting diodes (LEDs). The driver circuit includes: a string of LEDs divided into n groups, the n groups of LEDs being electrically connected to each other in series, a downstream end of group m-1 being electrically connected to the upstream end of group m, where m is a positive number equal to or less than n. The driver circuit also includes a plurality of current regulating circuits, each of the current regulating circuits being coupled to the downstream end of a corresponding group at one end and coupled to the ground at the other end and including a sensor amplifier and a cascode having first and second transistors, each sensor amplifier being coupled to a different voltage source for providing a different reference voltage thereto.

Abstract translation: 驱动发光二极管（LED）的驱动电路。 驱动器电路包括：一串LED分为n组，n组LED彼此串联电连接，组m-1的下游端电连接到组m的上游端，其中m为 正数等于或小于n。 驱动器电路还包括多个电流调节电路，每个电流调节电路在一端耦合到对应组的下游端，并在另一端耦合到地，并且包括传感器放大器和具有第一 和第二晶体管，每个传感器放大器耦合到不同的电压源，以向其提供不同的参考电压。

公开(公告)号：US20140232278A1

公开(公告)日：2014-08-21

申请号：US14266539

申请日：2014-04-30

Applicant: Jae Hong Jeong ,  Minjong Kim

Inventor： Jae Hong Jeong ,  Minjong Kim

IPC: H05B33/08

CPC classification number: H05B33/083 ,  H05B33/0806 ,  H05B33/089

Abstract: A driver circuit for driving light emitting diodes (LEDs). The driver circuit includes: a string of LEDs divided into n groups, the n groups of LEDs being electrically connected to each other in series, a downstream end of group m−1 being electrically connected to the upstream end of group m, where m is a positive number equal to or less than n. The driver circuit also includes a plurality of current regulating circuits, each of the current regulating circuits being coupled to the downstream end of a corresponding group at one end and coupled to the ground at the other end and including a sensor amplifier and a cascode having first and second transistors, each sensor amplifier being coupled to a different voltage source for providing a different reference voltage thereto.

Abstract translation: 驱动发光二极管（LED）的驱动电路。 驱动器电路包括：一串LED分为n组，n组LED彼此串联电连接，组m-1的下游端电连接到组m的上游端，其中m为 正数等于或小于n。 驱动器电路还包括多个电流调节电路，每个电流调节电路在一端耦合到对应组的下游端，并在另一端耦合到地，并且包括传感器放大器和具有第一 和第二晶体管，每个传感器放大器耦合到不同的电压源，以向其提供不同的参考电压。

公开(公告)号：US20120280622A1

公开(公告)日：2012-11-08

申请号：US13528850

申请日：2012-06-21

Applicant: Jae Hong Jeong ,  Minjong Kim

Inventor： Jae Hong Jeong ,  Minjong Kim

IPC: H05B37/02

CPC classification number: H05B33/083 ,  H05B33/0806 ,  H05B33/089

Abstract: A driver circuit for driving light emitting diodes (LEDs). The driver circuit includes: a string of LEDs divided into n groups, the n groups of LEDs being electrically connected to each other in series, a downstream end of group m-1 being electrically connected to the upstream end of group m, where m is a positive number equal to or less than n. The driver circuit also includes a plurality of current regulating circuits, each of the current regulating circuits being coupled to the downstream end of a corresponding group at one end and coupled to the ground at the other end and including a sensor amplifier and a cascode having first and second transistors, each sensor amplifier being coupled to a different voltage source for providing a different reference voltage thereto.

Abstract translation: 驱动发光二极管（LED）的驱动电路。 驱动器电路包括：一串LED分为n组，n组LED彼此串联电连接，组m-1的下游端电连接到组m的上游端，其中m为 正数等于或小于n。 驱动器电路还包括多个电流调节电路，每个电流调节电路在一端耦合到对应组的下游端，并在另一端耦合到地，并且包括传感器放大器和具有第一 和第二晶体管，每个传感器放大器耦合到不同的电压源，以向其提供不同的参考电压。

公开(公告)号：US20150271884A1

公开(公告)日：2015-09-24

申请号：US14222543

申请日：2014-03-21

Applicant: Minjong Kim ,  Weifeng Chen ,  Jungung Kim ,  Jaehong Jeong ,  Kyeongtae Moon

Inventor： Minjong Kim ,  Weifeng Chen ,  Jungung Kim ,  Jaehong Jeong ,  Kyeongtae Moon

IPC: H05B33/08

CPC classification number: H05B33/0845 ,  H05B33/0824 ,  H05B33/083 ,  H05B37/02

Abstract: An AC light system with a control unit for controlling power of an LED is disclosed. According to one embodiment, a driver circuit for driving LEDs has a plurality of current sinks, a first interface configured to receive an AC power from an AC power source, a second interface to a plurality LED groups. The driver circuit further has a third interface configured to receive a control input from a control unit. Each current sink of the plurality of current sinks controls an LED current flowing through a corresponding LED group based on the control input from the control unit.

Abstract translation: 公开了具有用于控制LED功率的控制单元的交流发光系统。 根据一个实施例，用于驱动LED的驱动器电路具有多个电流吸收器，被配置为从AC电源接收AC电力的第一接口，到多个LED组的第二接口。 驱动器电路还具有被配置为从控制单元接收控制输入的第三接口。 多个电流吸收器的每个电流吸收器基于来自控制单元的控制输入来控制流过对应的LED组的LED电流。

公开(公告)号：US20120223648A1

公开(公告)日：2012-09-06

申请号：US13040229

申请日：2011-03-03

Applicant: Xuecheng Jin ,  Minjong Kim ,  Enzhu Liang ,  John William Kesterson ,  Xiaoyan Wang

Inventor： Xuecheng Jin ,  Minjong Kim ,  Enzhu Liang ,  John William Kesterson ,  Xiaoyan Wang

IPC: H05B37/02

CPC classification number: H05B33/0815 ,  H05B33/0827 ,  H05B33/0851

Abstract: A system that provides an intelligent approach to driving multiple strings of LEDs. A processing device determines an optimal current level for each LED string from a limited set of allowed currents. The processing device also determines a PWM duty cycle for driving the LEDs in each LED string to provide precise brightness control over the LED string. The settings for the current level and duty cycle are transmitted to an LED driver for regulating the current and on-off times of the LED strings. Beneficially, the system reduces the size of the LED driver while leveraging existing resources available in the processing device to operate the LEDs in a power efficient manner.

Abstract translation: 提供智能方法来驱动多串LED的系统。 处理装置从有限的允许电流集合确定每个LED串的最佳电流电平。 处理装置还确定用于驱动每个LED串中的LED的PWM占空比，以提供对LED串的精确亮度控制。 当前电平和占空比的设置被传送到LED驱动器，用于调节LED串的电流和开关时间。 有利的是，该系统在利用处理装置中可利用的现有资源以功率有效的方式来操作LED的同时减小了LED驱动器的尺寸。

公开(公告)号：US08710753B2

公开(公告)日：2014-04-29

申请号：US13314103

申请日：2011-12-07

Applicant: Minjong Kim ,  Enzhu Liang ,  Xuecheng Jin

Inventor： Minjong Kim ,  Enzhu Liang ,  Xuecheng Jin

IPC: H05B37/02

CPC classification number: H05B33/0815 ,  H05B33/0824 ,  H05B37/02

Abstract: An LED driver controls current through an LED string. The LED driver generates a boosted PWM signal to drive a PWM transistor in the LED current path such that the PWM transistor maintains a substantially constant VGS, thus minimizing turn-on impedance of the PWM transistor. A current mirror circuit controls peak LED current when the PWM transistor is on. A trimming circuit includes a set of programmable switches to couple or decouple trimming transistor from the LED current path, and allowing for fine calibration of the LED current. By maintaining a low resistance and compensating for current mismatch in the LED current path, the LED driver provides efficient power performance and robustness that is particularly beneficial in high current applications.

Abstract translation: LED驱动器通过LED灯串控制电流。 LED驱动器产生升高的PWM信号以驱动LED电流路径中的PWM晶体管，使得PWM晶体管保持基本上恒定的VGS，从而最小化PWM晶体管的导通阻抗。 当PWM晶体管导通时，电流镜电路控制峰值LED电流。 修整电路包括一组可编程开关，用于将修整晶体管与LED电流路径耦合或去耦，并允许精确校准LED电流。 通过保持低电阻并补偿LED电流路径中的电流失配，LED驱动器提供了有效的功率性能和鲁棒性，这在大电流应用中特别有益。