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1. 发明申请

US20110031895A1 LIGHT EMITTING DIODE (LED) DRIVING CIRCUIT 有权
标题翻译：发光二极管（LED）驱动电路
公开(公告)号：US20110031895A1
公开(公告)日：2011-02-10
申请号：US12542700
申请日：2009-08-18
申请人： Chia-Lin Liu , Ling Li , Chia-Ling Peng , Kuo-Chung Lo , Chi-Neng Mo
发明人： Chia-Lin Liu , Ling Li , Chia-Ling Peng , Kuo-Chung Lo , Chi-Neng Mo
IPC分类号： H05B41/36
CPC分类号： H05B33/0818 , H05B33/0824 , Y02B20/347
摘要： A light emitting diode (LED) driving circuit is provided. The LED driving circuit includes a voltage adjusting unit, a switch unit, and a control unit. The control unit is coupled to the voltage adjusting unit and the switch unit. The voltage adjusting unit outputs a driving voltage to a first end of each of a plurality of load units. The switch unit is coupled to a second end of each of the load units. When one LED string in the load units is coupled to a current source, the voltage adjusting unit adjusts the voltage level of the driving voltage so that the voltage level of the driving voltage of the driving voltage corresponds to the driven LED string. Thereby, a driving problem caused by the variation in electrical characteristics of the LEDs is alleviated.
摘要翻译：提供了一种发光二极管（LED）驱动电路。 LED驱动电路包括电压调节单元，开关单元和控制单元。控制单元耦合到电压调节单元和开关单元。电压调整单元将驱动电压输出到多个负载单元中的每一个的第一端。开关单元联接到每个负载单元的第二端。当负载单元中的一个LED串被耦合到电流源时，电压调节单元调节驱动电压的电压电平，使得驱动电压的驱动电压的电压电平对应于驱动的LED串。由此，可以减轻由LED的电特性的变化引起的驱动问题。

2. 发明授权

US08120288B2 Light emitting diode (LED) driving circuit 有权
标题翻译：发光二极管（LED）驱动电路
公开(公告)号：US08120288B2
公开(公告)日：2012-02-21
申请号：US12542700
申请日：2009-08-18
申请人： Chia-Lin Liu , Ling Li , Chia-Ling Peng , Kuo-Chung Lo , Chi-Neng Mo
发明人： Chia-Lin Liu , Ling Li , Chia-Ling Peng , Kuo-Chung Lo , Chi-Neng Mo
IPC分类号： H05B37/02
CPC分类号： H05B33/0818 , H05B33/0824 , Y02B20/347
摘要： A light emitting diode (LED) driving circuit is provided. The LED driving circuit includes a voltage adjusting unit, a switch unit, and a control unit. The control unit is coupled to the voltage adjusting unit and the switch unit. The voltage adjusting unit outputs a driving voltage to a first end of each of a plurality of load units. The switch unit is coupled to a second end of each of the load units. When one LED string in the load units is coupled to a current source, the voltage adjusting unit adjusts the voltage level of the driving voltage so that the voltage level of the driving voltage of the driving voltage corresponds to the driven LED string. Thereby, a driving problem caused by the variation in electrical characteristics of the LEDs is alleviated.
摘要翻译：提供了一种发光二极管（LED）驱动电路。 LED驱动电路包括电压调节单元，开关单元和控制单元。控制单元耦合到电压调节单元和开关单元。电压调整单元将驱动电压输出到多个负载单元中的每一个的第一端。开关单元联接到每个负载单元的第二端。当负载单元中的一个LED串被耦合到电流源时，电压调节单元调节驱动电压的电压电平，使得驱动电压的驱动电压的电压电平对应于驱动的LED串。由此，可以减轻由LED的电特性的变化引起的驱动问题。

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