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公开(公告)号：US08994281B2
公开(公告)日：2015-03-31
申请号：US13620290
申请日：2012-09-14
申请人： Jong Tae Hwang , Deuk Hee Park , Sang Hyun Cha , Chang Seok Lee , Yun Joong Lee
发明人： Jong Tae Hwang , Deuk Hee Park , Sang Hyun Cha , Chang Seok Lee , Yun Joong Lee
CPC分类号： H05B33/0815
摘要： There is provided a light emitting diode driving apparatus capable of supplying a constant average current to a light emitting diode by generating a reference voltage used for driving the light emitting diode according to input power and a switching signal switching a path of a current supplied to the light emitting diode. The light emitting diode driving apparatus includes: a reference voltage generating unit generating a reference voltage set based on input power and a switching signal for supplying driving power to a light emitting diode; and a driving unit supplying the driving power to the light emitting diode according to the reference voltage.
摘要翻译： 提供了一种发光二极管驱动装置，其能够通过根据输入功率产生用于驱动发光二极管的参考电压，并向切换信号切换提供给发光二极管的电流的路径，向发光二极管提供恒定的平均电流 发光二极管。 发光二极管驱动装置包括：参考电压产生单元，其基于输入功率产生基准电压和用于向发光二极管提供驱动电力的开关信号; 以及驱动单元，根据参考电压将驱动电力提供给发光二极管。
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公开(公告)号：US08698422B2
公开(公告)日：2014-04-15
申请号：US13206195
申请日：2011-08-09
申请人： Jong Tae Hwang , Seong Joon Park , Dae Ho Kim , Moon Sang Jung
发明人： Jong Tae Hwang , Seong Joon Park , Dae Ho Kim , Moon Sang Jung
CPC分类号： H05B33/0818 , Y02B20/347
摘要： An average current controller configured for connection to display-components through a power switch. The average current controller includes first, second, and third comparators, an integrator, and a reference current generator. The first comparator compares a peak current level of reference current with a load current level of load current and outputs a first comparison result. The load current denotes current flowing through the display-components. The second comparator compares the peak current level of reference current with an average current level of the load current and outputs a second comparison result. The integrator integrates the second comparison result. The third comparator compares the integral value of the integrator with a predetermined value and outputs a third comparison result. The reference current generator sets the peak current level based on the first comparison result and the third comparison result and generates the reference current with the set peak current level.
摘要翻译： 一个平均电流控制器，配置为通过电源开关连接到显示器组件。 平均电流控制器包括第一，第二和第三比较器，积分器和参考电流发生器。 第一个比较器将参考电流的峰值电流电平与负载电流的负载电流水平进行比较，并输出第一个比较结果。 负载电流表示流过显示器组件的电流。 第二个比较器将参考电流的峰值电流电平与负载电流的平均电流电平进行比较，并输出第二个比较结果。 积分器集成了第二个比较结果。 第三比较器将积分器的积分值与预定值进行比较，并输出第三比较结果。 参考电流发生器基于第一比较结果和第三比较结果设置峰值电流电平，并以设定的峰值电流电平生成参考电流。
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公开(公告)号：US08674627B2
公开(公告)日：2014-03-18
申请号：US13468330
申请日：2012-05-10
申请人： Jong Tae Hwang , Moonsang Jung , Daeho Kim
发明人： Jong Tae Hwang , Moonsang Jung , Daeho Kim
CPC分类号： H05B33/0815
摘要： An isolated flyback converter for an LED driver includes a snubber circuit unit connected to the primary side of a transformer; and a snubber voltage detection unit which detects a snubber voltage of the snubber circuit unit and generates a reference voltage proportional to the detected snubber voltage. Further, the isolated flyback converter includes a switching unit with a source terminal and a drain terminal, and may be turned on or off in response to an arbitrary logic signal. Furthermore, the isolated flyback converter includes a control unit which compares a voltage supplied through the switching current sensing resistor with the reference voltage, and supplies a logic signal at relatively high level or relatively low level to the switching unit to control the switching unit such that a secondary-side current of the transformer is maintained relatively constant.
摘要翻译： 用于LED驱动器的隔离反激转换器包括连接到变压器初级侧的缓冲电路单元; 以及缓冲电压检测单元，其检测缓冲电路单元的缓冲电压并产生与检测到的缓冲电压成比例的参考电压。 此外，隔离反激式转换器包括具有源极端子和漏极端子的开关单元，并且可以响应于任意逻辑信号而导通或关断。 此外，隔离反激式转换器包括：控制单元，其将通过开关电流检测电阻器提供的电压与参考电压进行比较，并将相对较高电平或相对低电平的逻辑信号提供给开关单元，以控制开关单元，使得 变压器的次级侧电流保持相对恒定。
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公开(公告)号：US09190917B2
公开(公告)日：2015-11-17
申请号：US13472823
申请日：2012-05-16
申请人： Jong Tae Hwang , Moonsang Jung , Daeho Kim , SooHyun Moon , JongHa Shin , MinHo Jung , JunHong Lee
发明人： Jong Tae Hwang , Moonsang Jung , Daeho Kim , SooHyun Moon , JongHa Shin , MinHo Jung , JunHong Lee
CPC分类号： H02M3/33523 , H02M1/4258 , H02M2001/0009 , H02M2001/348 , H05B33/0815 , Y02B70/126
摘要： An isolated flyback converter for an LED driver may include: (1) A snubber circuit configured to be connected to the primary side of a transformer. (2) A switching unit configured to have a source terminal and a drain terminal and configured to be turned on or off. (3) A control unit configured to detect a first input signal proportional to a fluctuation in the power supply voltage, detect a second input signal when the switching unit is turned off, generate a signal inversely proportional to the maximum value of the first input signal and multiply the generated signal to the second input signal, and control a peak current of the switching unit to be proportional to the multiplication result of the signal inversely proportional to the maximum value of the first input signal and the second input signal such that a secondary-side current of the transformer is maintained constant.
摘要翻译： 用于LED驱动器的隔离反激式转换器可以包括：（1）缓冲电路，被配置为连接到变压器的初级侧。 （2）一种开关单元，被配置为具有源极端子和漏极端子并且被配置为导通或截止。 （3）一种控制单元，被配置为检测与电源电压的波动成比例的第一输入信号，当切换单元关闭时检测第二输入信号，产生与第一输入信号的最大值成反比的信号 并将所生成的信号与第二输入信号相乘，并且控制开关单元的峰值电流与与第一输入信号和第二输入信号的最大值成反比的信号的相乘结果成比例，使得次级 变压器的旁路电流保持恒定。
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公开(公告)号：US20130033197A1
公开(公告)日：2013-02-07
申请号：US13468330
申请日：2012-05-10
申请人： Jong Tae Hwang , Moonsang Jung , Daeho Kim
发明人： Jong Tae Hwang , Moonsang Jung , Daeho Kim
IPC分类号： H05B41/282
CPC分类号： H05B33/0815
摘要： An isolated flyback converter for an LED driver includes a snubber circuit unit connected to the primary side of a transformer; and a snubber voltage detection unit which detects a snubber voltage of the snubber circuit unit and generates a reference voltage proportional to the detected snubber voltage. Further, the isolated flyback converter includes a switching unit with a source terminal and a drain terminal, and may be turned on or off in response to an arbitrary logic signal. Furthermore, the isolated flyback converter includes a control unit which compares a voltage supplied through the switching current sensing resistor with the reference voltage, and supplies a logic signal at relatively high level or relatively low level to the switching unit to control the switching unit such that a secondary-side current of the transformer is maintained relatively constant.
摘要翻译： 用于LED驱动器的隔离反激转换器包括连接到变压器初级侧的缓冲电路单元; 以及缓冲电压检测单元，其检测缓冲电路单元的缓冲电压并产生与检测到的缓冲电压成比例的参考电压。 此外，隔离反激式转换器包括具有源极端子和漏极端子的开关单元，并且可以响应于任意逻辑信号而导通或关断。 此外，隔离反激式转换器包括：控制单元，其将通过开关电流检测电阻器提供的电压与参考电压进行比较，并将相对较高电平或相对低电平的逻辑信号提供给开关单元，以控制开关单元，使得 变压器的次级侧电流保持相对恒定。
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6.发明授权Driver circuit for driving light-emitting elements including a power switching element 有权用于驱动包括功率开关元件的发光元件的驱动电路公开(公告)号：US08492998B2
公开(公告)日：2013-07-23
申请号：US13206239
申请日：2011-08-09
申请人： Jong Tae Hwang , Seong Joon Park , Dae Ho Kim , Moon Sang Jung
发明人： Jong Tae Hwang , Seong Joon Park , Dae Ho Kim , Moon Sang Jung
IPC分类号： G05F1/00 , H05B37/02 , H05B39/04 , H05B41/36 , H05B39/02 , H05B37/00 , H05B39/00 , H05B41/00
CPC分类号： H05B33/0815
摘要： A driver circuit is configured to drive light-emitting elements. The driver circuit includes a light-emitting element, a power switching element, a control circuit, and a charge pump circuit. The power switching element includes a first terminal connected to the light-emitting element and turns on and off the light-emitting element. The control circuit is connected to a second terminal of the power switching element and controls a switching operation of the power switching element. The charge pump circuit is connected between the control circuit and a power source for the light-emitting element and supplies current to the control circuit for driving the control circuit.
摘要翻译： 驱动电路被配置为驱动发光元件。 驱动电路包括发光元件，功率开关元件，控制电路和电荷泵电路。 功率开关元件包括连接到发光元件的第一端子并且使发光元件接通和断开。 控制电路连接到电力开关元件的第二端子，并且控制电力开关元件的开关操作。 电荷泵电路连接在控制电路和发光元件的电源之间，并向控制电路提供电流以驱动控制电路。
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