公开(公告)号：US09271369B2

公开(公告)日：2016-02-23

申请号：US13586059

申请日：2012-08-15

申请人： Tae-kyoung Kang ,  Gyo-ho Lim ,  Hyoung-kyu Kim

发明人： Tae-kyoung Kang ,  Gyo-ho Lim ,  Hyoung-kyu Kim

IPC分类号： G09G5/10 ,  G09G3/36 ,  H05B33/08 ,  G09G3/34

CPC分类号： H05B33/0887 ,  G09G3/3406 ,  G09G2310/08 ,  G09G2320/064 ,  G09G2330/12 ,  H05B33/0815 ,  Y02B20/346

摘要： A Light Emitting Diode (LED) driving apparatus and a method of driving a LED backlight unit are provided. An LED driving apparatus includes: an input unit configured to receive a dimming signal, an extension unit configured to extend ON time of the inputted dimming signal, an LED driving unit configured to drive an LED array using the extended dimming signal, and a detection unit configured to detect a degradation of the LED array by measuring a forward voltage between the LED array and the LED driving unit.

摘要翻译： 提供发光二极管（LED）驱动装置和驱动LED背光单元的方法。 一种LED驱动装置，包括：被配置为接收调光信号的输入单元，被配置为延长所输入的调光信号的接通时间的扩展单元，配置成使用所述扩展调光信号驱动LED阵列的LED驱动单元，以及检测单元 被配置为通过测量LED阵列和LED驱动单元之间的正向电压来检测LED阵列的劣化。

公开(公告)号：US20130050288A1

公开(公告)日：2013-02-28

申请号：US13586059

申请日：2012-08-15

申请人： Tae-kyoung Kang ,  Gyo-ho Lim ,  Hyoung-kyu Kim

发明人： Tae-kyoung Kang ,  Gyo-ho Lim ,  Hyoung-kyu Kim

IPC分类号： H05B37/02 ,  G09G3/36 ,  G09G5/10

CPC分类号： H05B33/0887 ,  G09G3/3406 ,  G09G2310/08 ,  G09G2320/064 ,  G09G2330/12 ,  H05B33/0815 ,  Y02B20/346

摘要： A Light Emitting Diode (LED) driving apparatus and a method of driving a LED backlight unit are provided. An LED driving apparatus includes: an input unit configured to receive a dimming signal, an extension unit configured to extend ON time of the inputted dimming signal, an LED driving unit configured to drive an LED array using the extended dimming signal, and a detection unit configured to detect a degradation of the LED array by measuring a forward voltage between the LED array and the LED driving unit.

摘要翻译： 提供发光二极管（LED）驱动装置和驱动LED背光单元的方法。 一种LED驱动装置，包括：被配置为接收调光信号的输入单元，被配置为延长所输入的调光信号的接通时间的扩展单元，配置成使用所述扩展调光信号驱动LED阵列的LED驱动单元，以及检测单元 被配置为通过测量LED阵列和LED驱动单元之间的正向电压来检测LED阵列的劣化。

公开(公告)号：US20120313536A1

公开(公告)日：2012-12-13

申请号：US13487738

申请日：2012-06-04

申请人： Hyoung-kyu Kim ,  Tae-kyoung Kang ,  Gyu-ho Lim ,  Jin-wook Kim

发明人： Hyoung-kyu Kim ,  Tae-kyoung Kang ,  Gyu-ho Lim ,  Jin-wook Kim

IPC分类号： H05B37/02

CPC分类号： H05B33/0818 ,  H05B33/0884 ,  Y02B20/346

摘要： A LED driving circuit having a sensing unit is disclosed. The LED driving circuit includes an input unit configured to receive a dimming signal to drive an LED array, a DC-DC converter including a power transistor configured to perform a switching operation, the DC-DC converter being configured to provide an output voltage to the LED array by the switching operation, a PWM signal generating unit configured to provide a PWM signal to adjust power of the LED array to the power transistor, a LED driving unit configured to drive the LED array using the dimming signal, and a sensing unit configured to sense degradation of the power transistor.

摘要翻译： 公开了一种具有感测单元的LED驱动电路。 LED驱动电路包括：被配置为接收调光信号以驱动LED阵列的输入单元; DC-DC转换器，包括被配置为执行开关操作的功率晶体管，DC-DC转换器被配置为向 LED阵列，PWM信号生成单元，被配置为提供PWM信号以将LED阵列的功率调整到功率晶体管; LED驱动单元，被配置为使用调光信号驱动LED阵列;以及感测单元，被配置为 以感测功率晶体管的劣化。

公开(公告)号：US09253834B2

公开(公告)日：2016-02-02

申请号：US13487738

申请日：2012-06-04

申请人： Hyoung-kyu Kim ,  Tae-kyoung Kang ,  Gyu-ho Lim ,  Jin-wook Kim

发明人： Hyoung-kyu Kim ,  Tae-kyoung Kang ,  Gyu-ho Lim ,  Jin-wook Kim

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/0818 ,  H05B33/0884 ,  Y02B20/346

摘要： A LED driving circuit having a sensing unit is disclosed. The LED driving circuit includes an input unit configured to receive a dimming signal to drive an LED array, a DC-DC converter including a power transistor configured to perform a switching operation, the DC-DC converter being configured to provide an output voltage to the LED array by the switching operation, a PWM signal generating unit configured to provide a PWM signal to adjust power of the LED array to the power transistor, a LED driving unit configured to drive the LED array using the dimming signal, and a sensing unit configured to sense degradation of the power transistor.

摘要翻译： 公开了一种具有感测单元的LED驱动电路。 LED驱动电路包括：被配置为接收调光信号以驱动LED阵列的输入单元; DC-DC转换器，包括被配置为执行开关操作的功率晶体管，DC-DC转换器被配置为向 LED阵列，PWM信号生成单元，被配置为提供PWM信号以将LED阵列的功率调整到功率晶体管; LED驱动单元，被配置为使用调光信号驱动LED阵列;以及感测单元，被配置为 以感测功率晶体管的劣化。

公开(公告)号：US08710897B2

公开(公告)日：2014-04-29

申请号：US13488050

申请日：2012-06-04

申请人： Hyoung-kyu Kim ,  Jin-wook Kim ,  Bae-kun Choi

发明人： Hyoung-kyu Kim ,  Jin-wook Kim ,  Bae-kun Choi

IPC分类号： H03L5/00

CPC分类号： H03K3/356113

摘要： A level shifter and a method of operating a level shifter are provided. The level shifter includes a first-level shifter unit configured to convert an external input signal into a signal in a preset first-voltage range using a plurality of transistors and output the converted signal and a second-level shifter unit configured to convert the signal output from the first-level shifter unit into a signal in a preset second-voltage range using a plurality of transistors and output the converted signal.

摘要翻译： 提供了电平移位器和操作电平转换器的方法。 电平移位器包括：第一电平移位器单元，被配置为使用多个晶体管将外部输入信号转换为预置的第一电压范围的信号并输出​​转换的信号;以及第二电平移位器单元，被配置为将信号输出 使用多个晶体管从第一电平移位器单元变为预置的第二电压范围的信号，并输出转换的信号。

公开(公告)号：US20070000751A1

公开(公告)日：2007-01-04

申请号：US11434720

申请日：2006-05-17

申请人： Hyoung-kyu Kim

发明人： Hyoung-kyu Kim

IPC分类号： G07D7/00

CPC分类号： G07D7/1205

摘要： A multi-function peripheral device includes a scanning unit provided with a lamp that reads an image of an object to be copied, and an ultraviolet (UV) lamp that irradiates ultraviolet rays onto the object for the purpose of detecting a fluorescent substance on the object; a printing unit that prints an image data read by the scanning unit; and a controller that determines a counterfeit when the fluorescent substance is not detected on the object under the UV lamp and thereby, giving a visual or audible warning to a user.

摘要翻译： 多功能外围设备包括：扫描单元，其具有读取要复制的对象的图像的灯;以及为了检测物体上的荧光物质而将紫外线照射到物体上的紫外线（UV）灯 ; 打印单元，其打印由所述扫描单元读取的图像数据; 以及控制器，当在UV灯下的物体上未检测到荧光物质并且由此向用户给出视觉或听觉警告时，确定伪造物。