公开(公告)号：US20110261492A1

公开(公告)日：2011-10-27

申请号：US13092282

申请日：2011-04-22

申请人： SHAO-HUNG LU ,  JING-MENG LIU ,  JO-YU WANG ,  ISAAC Y. CHEN ,  AN-TUNG CHEN

发明人： SHAO-HUNG LU ,  JING-MENG LIU ,  JO-YU WANG ,  ISAAC Y. CHEN ,  AN-TUNG CHEN

IPC分类号： H02H3/26

CPC分类号： H02M1/32

摘要： For a system to avoid abnormal operation caused by a shorted parameter setting pin of an integrated circuit, a protection apparatus and method apply a buffered reference voltage to the parameter setting pin to define an internal parameter of the integrated circuit by the buffered reference voltage and an external element connected to the parameter setting pin, and detect the rapid variation of the internal parameter to trigger a shutdown signal or slow down the speed of the variation of the internal parameter reflected to an adjustable signal of the integrated circuit.

摘要翻译： 为了避免由集成电路的短路参数设置引脚引起的异常操作的系统，保护装置和方法将缓冲的参考电压施加到参数设置引脚，以通过缓冲的参考电压定义集成电路的内部参数，并且 外部元件连接到参数设置引脚，并检测内部参数的快速变化以触发关断信号或将内部参数变化的速度降低到集成电路的可调信号。

公开(公告)号：US20110316424A1

公开(公告)日：2011-12-29

申请号：US13227055

申请日：2011-09-07

申请人： CHIAWEI LIAO ,  JING-MENG LIU

发明人： CHIAWEI LIAO ,  JING-MENG LIU

IPC分类号： H05B37/02

CPC分类号： H05B33/089 ,  G02F1/133603 ,  G02F2001/133612

摘要： The present invention discloses a backlight control circuit, comprising: a voltage supply circuit for receiving an input voltage and generating an output voltage under control by a control signal; at least one voltage comparison path respectively coupled to at least one light emission device path; a voltage operative amplifier circuit for generating the control signal according to a lowest voltage on the at least one voltage comparison path; and at least one under current detection circuit for detecting whether a corresponding one of the at least one light emission device path is in an under current status, whereby when anyone of the under current detection circuits detects the under current status, it sends an exclusion signal excluding a corresponding one of the at least one voltage comparison path from being an effective input of the voltage operative amplifier.

摘要翻译： 本发明公开了一种背光控制电路，包括：电压供给电路，用于接收输入电压，并通过控制信号控制输出电压; 至少一个电压比较路径分别耦合到至少一个发光器件路径; 电压操作放大器电路，用于根据所述至少一个电压比较路径上的最低电压产生所述控制信号; 以及至少一个欠电流检测电路，用于检测所述至少一个发光器件路径中的相应一个发光器件路径是否处于低电流状态，由此当所述欠电流检测电路中的任何一个检测到当前状态时，发送排除信号 不包括所述至少一个电压比较路径中的相应一个电压作为所述电压运算放大器的有效输入。

公开(公告)号：US20110163696A1

公开(公告)日：2011-07-07

申请号：US12977775

申请日：2010-12-23

申请人： PEI-CHENG HUANG ,  JING-MENG LIU

发明人： PEI-CHENG HUANG ,  JING-MENG LIU

IPC分类号： H05B37/02

CPC分类号： H05B33/0845 ,  Y02B20/341

摘要： By monitoring the temperature of an LED and the temperature of a controller chip for the LED, a thermal foldback control is employed to gradually decrease the driving current of the LED before the LED or the controller chip is over heated, so as to prevent an over temperature protection from being triggered to shutdown the controller chip to cause the LED to undesirably flicker.

摘要翻译： 通过监测LED的温度和LED的控制器芯片的温度，采用热折返控制来逐渐降低LED在LED或控制器芯片过热之前的驱动电流，以防止过度 温度保护不被触发以关闭控制器芯片，导致LED不期望地闪烁。

公开(公告)号：US20100164394A1

公开(公告)日：2010-07-01

申请号：US12721829

申请日：2010-03-11

申请人： JING-MENG LIU

发明人： JING-MENG LIU

IPC分类号： H05B37/02

CPC分类号： H05B33/0848 ,  H05B33/0818 ,  Y02B20/346

摘要： A LED control circuit and method determine the frequency and duty of a LED driving signal according to a swing control signal and a dimming control signal, respectively. Responsive to the swing control signal, a pulse edge generator generates a clock whose frequency is determined by the swing control signal. Responsive to the clock and the dimming control signal, a duty ratio controller generates the LED driving signal whose frequency is determined by the clock frequency and whose duty is determined by the dimming control signal.

摘要翻译： LED控制电路和方法分别根据摆动控制信号和调光控制信号确定LED驱动信号的频率和占空比。 响应于摆动控制信号，脉冲沿发生器产生频率由摆动控制信号确定的时钟。 占空比控制器响应时钟和调光控制信号，产生频率由时钟频率确定的LED驱动信号，其占空比由调光控制信号决定。