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    • 2. 发明申请
    • Light-emitting Diode (LED) Current Balance Circuit
    • 发光二极管(LED)电流平衡电路
    • US20110127921A1
    • 2011-06-02
    • US12954958
    • 2010-11-29
    • Li-Wei LinChen-Chiang LEEChi-Hsin LEEYuan-Po HUANGWen-Ming LIN
    • Li-Wei LinChen-Chiang LEEChi-Hsin LEEYuan-Po HUANGWen-Ming LIN
    • H05B37/02
    • H05B33/0827H05B33/0887
    • A light-emitting diode (LED) current balance circuit includes a reference current generator, a current mirror and a voltage compensation circuit. The reference current generator provides a reference current robust against disturbance in a supply voltage applied to the reference current generator. The current mirror generates, according to the reference current, sink currents to bias lightbars and employs a structure to reduce the influence of unmatched transistors on the sink currents so as to stabilize and clamp currents through the lightbar. The voltage compensation circuit detects the voltages across the lightbars to compensate the lightbars having various forward voltages so as to ensure the turn-on of all lightbars and effectively balance the currents through the lightbars. Therefore, the invention employs simpler circuit architecture and not need a specific-purpose LED controller so as to be cheaper and more competitive.
    • 发光二极管(LED)电流平衡电路包括参考电流发生器,电流镜和电压补偿电路。 参考电流发生器提供了对施加到参考电流发生器的电源电压中的干扰的参考电流。 电流镜根据参考电流产生吸收电流以偏置光棒并且采用结构来减少不匹配的晶体管对吸收电流的影响,以便稳定和钳制通过光棒的电流。 电压补偿电路检测光束两端的电压,以补偿具有各种正向电压的光棒,以确保所有光条的导通,并有效平衡通过光棒的电流。 因此,本发明采用更简单的电路架构,并且不需要特定目的的LED控制器,以便更便宜和更具竞争力。
    • 3. 发明授权
    • Light-emitting diode (LED) current balance circuit
    • 发光二极管(LED)电流平衡电路
    • US08525436B2
    • 2013-09-03
    • US12954958
    • 2010-11-29
    • Li-Wei LinChen-Chiang LeeChi-Hsin LeeYuan-Po HuangWen-Ming Lin
    • Li-Wei LinChen-Chiang LeeChi-Hsin LeeYuan-Po HuangWen-Ming Lin
    • H05B37/02
    • H05B33/0827H05B33/0887
    • A light-emitting diode (LED) current balance circuit includes a reference current generator, a current mirror and a voltage compensation circuit. The reference current generator provides a reference current robust against disturbance in a supply voltage applied to the reference current generator. The current mirror generates, according to the reference current, sink currents to bias lightbars and employs a structure to reduce the influence of unmatched transistors on the sink currents to stabilize and clamp currents through the lightbar. The voltage compensation circuit detects the voltages across the lightbars to compensate the lightbars having various forward voltages to ensure the turn-on of all lightbars and to effectively balance the currents through the lightbars. Therefore, a simpler circuit architecture is employed which does not need a specific-purpose LED controller to be cheaper and more competitive.
    • 发光二极管(LED)电流平衡电路包括参考电流发生器,电流镜和电压补偿电路。 参考电流发生器提供了对施加到参考电流发生器的电源电压中的干扰的参考电流。 电流镜根据参考电流产生吸收电流以偏置光棒并且采用结构来减少不匹配的晶体管对吸收电流的影响,以稳定和钳制通过光棒的电流。 电压补偿电路检测光束两端的电压,以补偿具有各种正向电压的光棒,以确保所有光条的导通,并有效平衡通过光棒的电流。 因此,采用更简单的电路结构,其不需要特定目的的LED控制器以便更便宜和更具竞争力。
    • 4. 发明申请
    • Serial-Type Light-Emitting Diode (LED) Device
    • 串联型发光二极管(LED)装置
    • US20110148314A1
    • 2011-06-23
    • US12974074
    • 2010-12-21
    • Li-Wei LinChen-Chiang LeeChi-Hsin Lee
    • Li-Wei LinChen-Chiang LeeChi-Hsin Lee
    • H05B37/02
    • H05B33/0827
    • A serial-type LED device includes p light source units and a dimming circuit. Each light source unit includes a first and a second terminals, m light strings and m current balance units. Each light string includes LEDs coupled in series to have a first terminal coupled to the first terminal of a corresponding light source unit and a second terminal coupled to the second terminal of the corresponding light source unit through a corresponding current balance unit. The first terminal of the first light source unit is coupled to a second DC voltage, and the second terminal of the i-th light source unit is coupled to the first terminal of the (i+1)-th light source unit, where m and p are integers greater than or equal to 2 and i is any integer from 1 to (p−1). The dimming circuit coupled to the second terminal of the p-th light source unit controls the second DC voltage according to a current outputted from the p-th light source unit.
    • 串联型LED器件包括p个光源单元和一个调光电路。 每个光源单元包括第一和第二端子,m个光线和m个电流平衡单元。 每个灯串包括串联耦合的LED以具有耦合到相应光源单元的第一端的第一端和通过相应的电流平衡单元耦合到相应光源单元的第二端的第二端。 第一光源单元的第一端子耦合到第二DC电压,并且第i个光源单元的第二端子耦合到第(i + 1)个光源单元的第一端子,其中m p是大于或等于2的整数,i是从1到(p-1)的任何整数。 耦合到第p个光源单元的第二端的调光电路根据从第p个光源单元输出的电流来控制第二直流电压。
    • 8. 发明授权
    • Serial-type light-emitting diode (LED) device
    • 串联式发光二极管(LED)装置
    • US08610368B2
    • 2013-12-17
    • US12974074
    • 2010-12-21
    • Li-Wei LinChen-Chiang LeeChi-Hsin Lee
    • Li-Wei LinChen-Chiang LeeChi-Hsin Lee
    • G05F1/00
    • H05B33/0827
    • A serial-type LED device includes p light source units and a dimming circuit. Each light source unit includes first and second terminals, m light strings and m current balance units. Each light string includes LEDs coupled in series to have a first terminal coupled to the first terminal of a corresponding light source unit and a second terminal coupled to the second terminal of the corresponding light source unit through a corresponding current balance unit. The first terminal of the first light source unit is coupled to a second DC voltage, and the second terminal of the i-th light source unit is coupled to the first terminal of the (i+1)-th light source unit, where m and p are integers greater than or equal to 2, and i is any integer from 1 to (p−1). The dimming circuit coupled to the second terminal of the p-th light source unit controls the second DC voltage according to a current outputted from the p-th light source unit.
    • 串联型LED器件包括p个光源单元和一个调光电路。 每个光源单元包括第一和第二端子,m个光线和m个电流平衡单元。 每个灯串包括串联耦合的LED以具有耦合到相应光源单元的第一端的第一端和通过相应的电流平衡单元耦合到相应光源单元的第二端的第二端。 第一光源单元的第一端子耦合到第二DC电压,并且第i个光源单元的第二端子耦合到第(i + 1)个光源单元的第一端子,其中m p是大于或等于2的整数,i是从1到(p-1)的整数。 耦合到第p个光源单元的第二端的调光电路根据从第p个光源单元输出的电流来控制第二直流电压。