公开(公告)号：US08410711B2

公开(公告)日：2013-04-02

申请号：US13218755

申请日：2011-08-26

Applicant: Yung Lin Lin ,  Sterling Du

Inventor： Yung Lin Lin ,  Sterling Du

IPC: H05B37/00

CPC classification number: H05B33/0815 ,  H05B33/0824

Abstract: In one embodiment, a driving circuit includes an AC/DC converter which converts an AC voltage to a DC voltage and a DC/DC linear regulator which regulates a current through, e.g., an LED light source, according to a first current reference if a monitoring signal indicating the DC voltage is within a predetermined range, and regulates the current according to a second current reference less than the first current reference if the monitoring signal is beyond the predetermined range. In another embodiment, a controller controlling power to an LED light source turns on a first plurality of LEDs and turns off a second plurality of LEDs if a monitoring signal indicative of a DC voltage received by the LED light source is within a predetermined range, and turns on both first and second plurality of LEDs if the monitoring signal is beyond the predetermined range.

Abstract translation: 在一个实施例中，驱动电路包括将AC电压转换为DC电压的AC / DC转换器，以及DC / DC线性调节器，DC调节器通过例如LED光源来调节电流，根据第一电流参考，如果 指示DC电压的监视信号在预定范围内，并且如果监视信号超出预定范围，则根据小于第一电流参考值的第二电流基准来调节电流。 在另一个实施例中，如果指示由LED光源接收到的直流电压的监视信号在预定范围内，控制LED光源的控制器的控制器接通第一多个LED并且关闭第二多个LED，并且 如果监视信号超过预定范围，则打开第一和第二多个LED。

公开(公告)号：US20110221795A1

公开(公告)日：2011-09-15

申请号：US13094384

申请日：2011-04-26

Applicant: Kaiping Ran ,  Da Liu ,  Yung Lin Lin

Inventor： Kaiping Ran ,  Da Liu ,  Yung Lin Lin

IPC: G09G5/10 ,  H05B37/03

CPC classification number: H05B33/0851 ,  G09G3/3406 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2320/0633 ,  G09G2320/064 ,  G09G2330/06 ,  H05B33/0818 ,  H05B33/0827 ,  Y02B20/346

Abstract: A backlight controller for driving multiple light emitting diode (LED) strings includes feedback circuitry, phase array circuitry, and encoder circuitry. The feedback circuitry generates multiple feedback signals indicative of currents flowing through the LED strings respectively. The encoder circuitry generates a code signal indicative of a total number of operative LED strings among the multiple LED strings based on the feedback signals. The phase array circuitry generates multiple saw tooth signals according to the code signal. A phase shift amount between two adjacent signals of the saw tooth signals is determined by the total number of the operative LED strings. The phase array circuitry compares each of the saw tooth signals with a dimming control signal to generate multiple phase shift signals so as to respectively control the operative LED strings.

Abstract translation: 用于驱动多个发光二极管（LED）串的背光控制器包括反馈电路，相位阵列电路和编码器电路。 反馈电路分别产生指示流过LED串的电流的多个反馈信号。 编码器电路基于反馈信号产生指示多个LED串中的操作LED串的总数的代码信号。 相位阵列电路根据码信号产生多个锯齿信号。 锯齿信号的两个相邻信号之间的相移量由可操作的LED串的总数确定。 相位阵列电路将每个锯齿信号与调光控制信号进行比较，以产生多个相移信号，以分别控制工作LED串。

公开(公告)号：US07881084B2

公开(公告)日：2011-02-01

申请号：US12136597

申请日：2008-06-10

Applicant: Yung Lin Lin

Inventor： Yung Lin Lin

IPC: H02M3/24

CPC classification number: H05B41/3927 ,  H02M7/523 ,  H02M7/5387 ,  H02M2001/0048 ,  H02M2007/4815 ,  H05B41/2828 ,  H05B41/2855 ,  Y02B20/185 ,  Y02B70/1441 ,  Y02B70/1491

Abstract: A DC/AC cold cathode fluorescent lamp (CCFL) inverter circuit includes a transformer with a primary winding and a secondary winding for providing increased voltage to a CCFL, a first and second MOSFET switches for selectively allowing direct current of a first polarity and a second polarity to flow through the transformer respectively. The primary and secondary windings of the transformer are electrically coupled to ground. A capacitor divider is electrically coupled to the CCFL for providing a first voltage signal representing a voltage across the CCFL. A first feedback signal line receives the first voltage signal. A timer circuit is coupled to the first feedback signal line for providing a time-out sequence of a predetermined duration when the first voltage signal exceeds a predetermined threshold. A protection circuit shuts down the first switch and the second switch when the first voltage signal exceeds the predetermined threshold after the predetermined duration.

Abstract translation: DC / AC冷阴极荧光灯（CCFL）逆变器电路包括具有初级绕组的变压器和用于向CCFL提供增加的电压的次级绕组，用于选择性地允许第一极性的直流电流的第一和第二MOSFET开关，以及第二极性 极性分别流过变压器。 变压器的初级和次级绕组电耦合到地。 电容分压器电耦合到CCFL，用于提供表示跨越CCFL的电压的第一电压信号。 第一反馈信号线接收第一电压信号。 当第一电压信号超过预定阈值时，定时器电路耦合到第一反馈信号线，用于提供预定持续时间的超时序列。 当第一电压信号在预定的持续时间之后超过预定阈值时，保护电路关闭第一开关和第二开关。

公开(公告)号：US20120217878A1

公开(公告)日：2012-08-30

申请号：US13218755

申请日：2011-08-26

Applicant: Yung Lin Lin ,  Sterling Du

Inventor： Yung Lin Lin ,  Sterling Du

IPC: H05B37/02

CPC classification number: H05B33/0815 ,  H05B33/0824

Abstract: In one embodiment, a driving circuit includes an AC/DC converter which converts an AC voltage to a DC voltage and a DC/DC linear regulator which regulates a current through, e.g., an LED light source, according to a first current reference if a monitoring signal indicating the DC voltage is within a predetermined range, and regulates the current according to a second current reference less than the first current reference if the monitoring signal is beyond the predetermined range. In another embodiment, a controller controlling power to an LED light source turns on a first plurality of LEDs and turns off a second plurality of LEDs if a monitoring signal indicative of a DC voltage received by the LED light source is within a predetermined range, and turns on both first and second plurality of LEDs if the monitoring signal is beyond the predetermined range.

Abstract translation: 在一个实施例中，驱动电路包括将AC电压转换为DC电压的AC / DC转换器，以及DC / DC线性调节器，DC调节器通过例如LED光源来调节电流，根据第一电流参考，如果 指示DC电压的监视信号在预定范围内，并且如果监视信号超出预定范围，则根据小于第一电流参考值的第二电流基准来调节电流。 在另一个实施例中，如果指示由LED光源接收到的直流电压的监视信号在预定范围内，控制LED光源的控制器的控制器接通第一多个LED并且关闭第二多个LED，并且 如果监视信号超过预定范围，则打开第一和第二多个LED。

公开(公告)号：US08248439B2

公开(公告)日：2012-08-21

申请号：US13094384

申请日：2011-04-26

Applicant: Kaiping Ran ,  Da Liu ,  Yung Lin Lin

Inventor： Kaiping Ran ,  Da Liu ,  Yung Lin Lin

IPC: G09G5/10 ,  G09G3/00 ,  G09G3/32

CPC classification number: H05B33/0851 ,  G09G3/3406 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2320/0633 ,  G09G2320/064 ,  G09G2330/06 ,  H05B33/0818 ,  H05B33/0827 ,  Y02B20/346

Abstract: A backlight controller for driving multiple light emitting diode (LED) strings includes feedback circuitry, phase array circuitry, and encoder circuitry. The feedback circuitry generates multiple feedback signals indicative of currents flowing through the LED strings respectively. The encoder circuitry generates a code signal indicative of a total number of operative LED strings among the multiple LED strings based on the feedback signals. The phase array circuitry generates multiple saw tooth signals according to the code signal. A phase shift amount between two adjacent signals of the saw tooth signals is determined by the total number of the operative LED strings. The phase array circuitry compares each of the saw tooth signals with a dimming control signal to generate multiple phase shift signals so as to respectively control the operative LED strings.

Abstract translation: 用于驱动多个发光二极管（LED）串的背光控制器包括反馈电路，相位阵列电路和编码器电路。 反馈电路分别产生指示流过LED串的电流的多个反馈信号。 编码器电路基于反馈信号产生指示多个LED串中的操作LED串的总数的代码信号。 相位阵列电路根据码信号产生多个锯齿信号。 锯齿信号的两个相邻信号之间的相移量由可操作的LED串的总数确定。 相位阵列电路将每个锯齿信号与调光控制信号进行比较以产生多个相移信号，以分别控制工作LED串。

公开(公告)号：US08148919B2

公开(公告)日：2012-04-03

申请号：US13274663

申请日：2011-10-17

Applicant: Da Liu ,  Yung Lin Lin

Inventor： Da Liu ,  Yung Lin Lin

IPC: H05B37/02

CPC classification number: H05B33/0815 ,  G09G3/3406 ,  G09G2330/028 ,  H05B33/0827 ,  H05B33/0848

Abstract: A driving circuit for powering a light-emitting diode (LED) light source includes a converter circuit, an energy storage element and a switch element. The converter circuit provides a first output voltage on a first power line to provide power to the LED light source and provides a second output voltage on a second power line that is less than the first output voltage. The energy storage element is charged and discharged to regulate a current through the LED light source. The switch element operates in a first state during which the energy storage element is charged and operates in a second state during which the energy storage element is discharged. The converter circuit provides the second output voltage to maintain an operating voltage across the switch element less than the first output voltage during both the first state and the second state.

Abstract translation: 用于对发光二极管（LED）光源供电的驱动电路包括转换器电路，能量存储元件和开关元件。 转换器电路在第一电力线上提供第一输出电压以向LED光源提供电力，并且在小于第一输出电压的第二电力线上提供第二输出电压。 储能元件被充放电以调节通过LED光源的电流。 开关元件工作在第一状态，在该状态期间，能量存储元件被充电并且在能量存储元件被放电的第二状态下操作。 在第一状态和第二状态期间，转换器电路提供第二输出电压以保持开关元件两端的工作电压小于第一输出电压。