公开(公告)号：US20130147355A1

公开(公告)日：2013-06-13

申请号：US13693516

申请日：2012-12-04

申请人： Jun-sik Min ,  Tae-kyoung Kang ,  Beom-seon Ryu

发明人： Jun-sik Min ,  Tae-kyoung Kang ,  Beom-seon Ryu

IPC分类号： H05B37/03

CPC分类号： H05B37/03 ,  H05B33/0827 ,  H05B33/0887

摘要： A detecting circuit and method thereof are configured to detect whether an LED array is open is described. The detecting circuit includes a resistance unit, a first switching unit, and an output unit. The resistance unit is operatively connected in series to the LED array. The switching unit is configured to be turned on when a voltage of the resistance unit is greater than or equal to a predetermined voltage level. The output unit is configured to produce an output indicative of whether the LED array is open, based whether the first switching unit is turned on.

摘要翻译： 其检测电路及其方法被配置为检测LED阵列是否打开。 检测电路包括电阻单元，第一开关单元和输出单元。 电阻单元可操作地与LED阵列串联连接。 开关单元被配置为当电阻单元的电压大于或等于预定电压电平时导通。 输出单元被配置为基于第一开关单元是否被接通来产生指示LED阵列是否打开的输出。

公开(公告)号：US08941327B2

公开(公告)日：2015-01-27

申请号：US13397864

申请日：2012-02-16

申请人： Beom-seon Ryu ,  Chang-sik Lim ,  Tae-kyoung Kang

发明人： Beom-seon Ryu ,  Chang-sik Lim ,  Tae-kyoung Kang

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/0827

摘要： A Light Emitting Diode (LED) driver circuit and a Pulse Width Modulation (PWM) controlling circuit thereof is provided. The LED driver circuit includes a voltage detector connected to a plurality of LED arrays, the voltage detector being configured to determine a connection status of each of the LED arrays according to a level of a feedback voltage of each of the LED arrays, and detect a minimum feedback voltage from the feedback voltage of each of the LED arrays that are determined to be connected, a controller configured to output a control signal to control boosting of the LED arrays according to the detected minimum feedback voltage, a PWM signal generator configured to output a PWM signal corresponding to the outputted control signal, and a driving voltage generator configured to supply a driving voltage commonly to the LED arrays according to the PWM signal.

摘要翻译： 提供了一种发光二极管（LED）驱动电路及其脉宽调制（PWM）控制电路。 LED驱动器电路包括连接到多个LED阵列的电压检测器，电压检测器被配置为根据每个LED阵列的反馈电压的电平来确定每个LED阵列的连接状态，并且检测 确定要连接的每个LED阵列的反馈电压的最小反馈电压，被配置为输出控制信号以根据检测到的最小反馈电压来控制LED阵列升压的控制器; PWM信号发生器，被配置为输出 对应于所输出的控制信号的PWM信号;以及驱动电压发生器，被配置为根据PWM信号向LED阵列提供共同的驱动电压。

公开(公告)号：US08860320B2

公开(公告)日：2014-10-14

申请号：US13586089

申请日：2012-08-15

申请人： Tae-kyoung Kang ,  Chang-sik Lim ,  Eun-ah Ko ,  Beom-seon Ryu

发明人： Tae-kyoung Kang ,  Chang-sik Lim ,  Eun-ah Ko ,  Beom-seon Ryu

IPC分类号： H05B37/03 ,  H05B33/08 ,  H05B37/02 ,  G09G3/34

CPC分类号： H05B37/02 ,  G09G3/3406 ,  G09G2320/064 ,  H05B33/0818 ,  H05B33/086 ,  H05B33/0887 ,  Y02B20/346

摘要： A Light Emitting Diode (LED) driver apparatus is provided. The LED driver apparatus includes: a Pulse Width Modulation (PWM) signal generator configured to generate a PWM signal, a DC-DC converter configured to provide a driving voltage of a plurality of LED arrays by using the generated PWM signal, and a sensor configured to determine whether at least one LED array among the plurality of LED arrays is in an open state in response to the driving voltage being higher than or equal to a preset first reference voltage, and the preset first reference voltage is higher than the driving voltage applied when the plurality of LED arrays are each in a working state.

摘要翻译： 提供发光二极管（LED）驱动器装置。 LED驱动器装置包括：被配置为产生PWM信号的脉宽调制（PWM）信号发生器，被配置为通过使用所产生的PWM信号来提供多个LED阵列的驱动电压的DC-DC转换器，以及配置 以确定多个LED阵列中的至少一个LED阵列是否响应于高于或等于预设的第一参考电压的驱动电压处于打开状态，并且预设的第一参考电压高于施加的驱动电压 当多个LED阵列处于工作状态时。

公开(公告)号：US20130049614A1

公开(公告)日：2013-02-28

申请号：US13586089

申请日：2012-08-15

申请人： Tae-kyoung Kang ,  Chang-sik Lim ,  Eun-ah Ko ,  Beom-seon Ryu

发明人： Tae-kyoung Kang ,  Chang-sik Lim ,  Eun-ah Ko ,  Beom-seon Ryu

IPC分类号： H05B37/02 ,  G02F1/13357

CPC分类号： H05B37/02 ,  G09G3/3406 ,  G09G2320/064 ,  H05B33/0818 ,  H05B33/086 ,  H05B33/0887 ,  Y02B20/346

摘要： A Light Emitting Diode (LED) driver apparatus is provided. The LED driver apparatus includes: a Pulse Width Modulation (PWM) signal generator configured to generate a PWM signal, a DC-DC converter configured to provide a driving voltage of a plurality of LED arrays by using the generated PWM signal, and a sensor configured to determine whether at least one LED array among the plurality of LED arrays is in an open state in response to the driving voltage being higher than or equal to a preset first reference voltage, and the preset first reference voltage is higher than the driving voltage applied when the plurality of LED arrays are each in a working state.

摘要翻译： 提供发光二极管（LED）驱动器装置。 LED驱动器装置包括：被配置为产生PWM信号的脉宽调制（PWM）信号发生器，被配置为通过使用所产生的PWM信号来提供多个LED阵列的驱动电压的DC-DC转换器，以及配置 以确定多个LED阵列中的至少一个LED阵列是否响应于高于或等于预设的第一参考电压的驱动电压处于打开状态，并且预设的第一参考电压高于施加的驱动电压 当多个LED阵列处于工作状态时。

公开(公告)号：US20120212141A1

公开(公告)日：2012-08-23

申请号：US13397864

申请日：2012-02-16

申请人： Beom-seon Ryu ,  Chang-sik Lim ,  Tae-kyoung Kang

发明人： Beom-seon Ryu ,  Chang-sik Lim ,  Tae-kyoung Kang

IPC分类号： H05B37/02

CPC分类号： H05B33/0827

摘要： A Light Emitting Diode (LED) driver circuit and a Pulse Width Modulation (PWM) controlling circuit thereof is provided. The LED driver circuit includes a voltage detector connected to a plurality of LED arrays, the voltage detector being configured to determine a connection status of each of the LED arrays according to a level of a feedback voltage of each of the LED arrays, and detect a minimum feedback voltage from the feedback voltage of each of the LED arrays that are determined to be connected, a controller configured to output a control signal to control boosting of the LED arrays according to the detected minimum feedback voltage, a PWM signal generator configured to output a PWM signal corresponding to the outputted control signal, and a driving voltage generator configured to supply a driving voltage commonly to the LED arrays according to the PWM signal.

摘要翻译： 提供了一种发光二极管（LED）驱动电路及其脉宽调制（PWM）控制电路。 LED驱动器电路包括连接到多个LED阵列的电压检测器，电压检测器被配置为根据每个LED阵列的反馈电压的电平来确定每个LED阵列的连接状态，并且检测 确定要连接的每个LED阵列的反馈电压的最小反馈电压，被配置为输出控制信号以根据检测到的最小反馈电压来控制LED阵列升压的控制器; PWM信号发生器，被配置为输出 对应于所输出的控制信号的PWM信号;以及驱动电压发生器，被配置为根据PWM信号向LED阵列提供共同的驱动电压。

公开(公告)号：US20120212281A1

公开(公告)日：2012-08-23

申请号：US13398306

申请日：2012-02-16

申请人： Beom-seon Ryu ,  Gyu-ho Lim

发明人： Beom-seon Ryu ,  Gyu-ho Lim

IPC分类号： H03L5/00

CPC分类号： H03K3/356113 ,  H03K3/356182

摘要： A level shifter is provided. The level shifter includes a signal converter connected to an external power source and a ground, first and second output terminals connected to the signal converter, the first and second output terminals being configured to output a bias voltage applied from the external power source, and a switching unit configured to switch a connection state of the signal converter according to an input signal to adjust output voltage values of the first and second output terminals, the switching unit including first and second transistors, the first transistor being of a type that is different from a type of the second transistor, the first and second transistors being connected to each other in series between an input terminal, to which an input signal is applied, and the external power source, gates of the first and second transistors being commonly connected to the second output terminal.

摘要翻译： 提供电平转换器。 电平移位器包括连接到外部电源的信号转换器和连接到信号转换器的接地，第一和第二输出端子，第一和第二输出端子被配置为输出从外部电源施加的偏置电压，以及 开关单元，被配置为根据输入信号切换所述信号转换器的连接状态，以调整所述第一和第二输出端子的输出电压值，所述开关单元包括第一和第二晶体管，所述第一晶体管的类型不同于 一种第二晶体管，第一和第二晶体管串联连接在施加输入信号的输入端与外部电源之间，第一和第二晶体管的栅极共同连接到 第二输出端子。

公开(公告)号：US20120212142A1

公开(公告)日：2012-08-23

申请号：US13397936

申请日：2012-02-16

申请人： Beom-seon Ryu ,  Chang-sik Lim ,  Jin-wook Kim

发明人： Beom-seon Ryu ,  Chang-sik Lim ,  Jin-wook Kim

IPC分类号： H05B37/02

CPC分类号： H05B33/0827 ,  H05B33/0815 ,  H05B33/0851 ,  Y02B20/346

摘要： A Pulse Width Modulation (PWM) controlling circuit and a Light Emitting Diode (LED) driver circuit having the same are provided. An LED driver circuit includes a voltage detector connected to a plurality of LED arrays, the voltage detector being configured to determine a connection status of each of the LED arrays according to a corresponding level of the feedback voltage, and detect a minimum feedback voltage from feedback voltages of the LED arrays that are determined to be connected, a controller configured to output a control signal to one of abort and control boosting of the LED arrays according to the detected minimum feedback voltage, and a Pulse Width Modulation (PWM) signal generator configured to output a PWM signal corresponding to the outputted control signal according to an on/off state of a dimming signal that drives the LED arrays that are determined to be connected.

摘要翻译： 提供了具有该脉宽调制（PWM）控制电路和发光二极管（LED）驱动电路的脉宽调制（PWM）控制电路。 LED驱动器电路包括连接到多个LED阵列的电压检测器，电压检测器被配置为根据反馈电压的相应电平来确定每个LED阵列的连接状态，并且从反馈检测最小反馈电压 确定要连接的LED阵列的电压，被配置为根据检测到的最小反馈电压将控制信号输出到LED阵列的中止和控制升压之一的控制器以及被配置为的脉冲宽度调制（PWM）信号发生器 根据驱动被确定为连接的LED阵列的调光信号的开/关状态输出与输出的控制信号对应的PWM信号。

公开(公告)号：US09596723B2

公开(公告)日：2017-03-14

申请号：US13285253

申请日：2011-10-31

申请人： Beom-seon Ryu ,  Chang-sik Lim

发明人： Beom-seon Ryu ,  Chang-sik Lim

IPC分类号： H05B33/08 ,  G09G3/34

CPC分类号： H05B33/0815 ,  G09G3/3406 ,  G09G2310/08 ,  G09G2320/064 ,  G09G2330/02 ,  Y02B20/346

摘要： An LED driving circuit is provided. The LED driving circuit includes an input unit which receives an input dimming signal for driving an LED array, a PWM signal generating unit which extends an on-period of the input dimming signal to form an extended dimming signal, and generates a PWM signal using the extended dimming signal, a DC-DC converter which supplies output voltage to the LED array using the PWM signal, and an LED driving unit which drives the LED array using the input dimming signal.

摘要翻译： 提供LED驱动电路。 LED驱动电路包括：输入单元，其接收用于驱动LED阵列的输入调光信号; PWM信号生成单元，其扩展输入调光信号的接通周期以形成扩展调光信号，并使用该信号产生PWM信号 扩展调光信号，使用PWM信号向LED阵列提供输出电压的DC-DC转换器，以及使用输入调光信号驱动LED阵列的LED驱动单元。

公开(公告)号：US20120112655A1

公开(公告)日：2012-05-10

申请号：US13285253

申请日：2011-10-31

申请人： Beom-seon Ryu ,  Chang-sik Lim

发明人： Beom-seon Ryu ,  Chang-sik Lim

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  G09G3/3406 ,  G09G2310/08 ,  G09G2320/064 ,  G09G2330/02 ,  Y02B20/346

摘要： An LED driving circuit is provided. The LED driving circuit includes an input unit which receives an input dimming signal for driving an LED array, a PWM signal generating unit which extends an on-period of the input dimming signal to form an extended dimming signal, and generates a PWM signal using the extended dimming signal, a DC-DC converter which supplies output voltage to the LED array using the PWM signal, and an LED driving unit which drives the LED array using the input dimming signal.

摘要翻译： 提供LED驱动电路。 LED驱动电路包括：输入单元，其接收用于驱动LED阵列的输入调光信号; PWM信号生成单元，其扩展输入调光信号的接通周期以形成扩展调光信号，并使用该信号产生PWM信号 扩展调光信号，使用PWM信号向LED阵列提供输出电压的DC-DC转换器，以及使用输入调光信号驱动LED阵列的LED驱动单元。

公开(公告)号：US09173260B2

公开(公告)日：2015-10-27

申请号：US13285425

申请日：2011-10-31

申请人： Beom-seon Ryu ,  Chang-sik Lim

发明人： Beom-seon Ryu ,  Chang-sik Lim

IPC分类号： H05B33/08

CPC分类号： H05B33/0812 ,  H05B33/0815 ,  Y02B20/343 ,  Y02B20/346

摘要： A PWM signal generating circuit and method, and an LED driver circuit using same, is disclosed. The PWM signal generating circuit generates a PWM signal for a DC-DC converter using a dimming signal, and includes an oscillator which generates a first clock signal having a predetermined frequency, a synchronizing unit which synchronizes the dimming signal to the first clock signal, and a PWM signal generating unit which generates the PWM signal in response to the first clock signal having a falling edge while the synchronized dimming signal is on.

摘要翻译： 公开了一种PWM信号发生电路和方法以及使用该PWM信号的LED驱动电路。 PWM信号发生电路使用调光信号产生用于DC-DC转换器的PWM信号，并且包括产生具有预定频率的第一时钟信号的振荡器，使调光信号与第一时钟信号同步的同步单元和 PWM信号生成单元，其在同步调光信号为开时响应于具有下降沿的第一时钟信号而产生PWM信号。