公开(公告)号：US20070236445A1

公开(公告)日：2007-10-11

申请号：US11696529

申请日：2007-04-04

申请人： Jung Chul GONG ,  Byoung Own MIN ,  Sang Cheol SHIN ,  Chang Woo HA

发明人： Jung Chul GONG ,  Byoung Own MIN ,  Sang Cheol SHIN ,  Chang Woo HA

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G2320/0247

摘要： In a driving circuit for an LCD backlight, a fundamental wave generator generates a triangle wave signal and a square wave signal in accordance with time constant of a time constant circuit including a time constant capacitor. A PWM comparator compares a difference signal between a feedback voltage and a preset reference voltage with the triangle wave signal to generate a PWM signal in response to the comparison result. A signal synchronizer sets a connection node between the time constant capacitor and the fundamental wave generator and an output terminal of the square wave signal in accordance with a power level of the LCD backlight. Also, a driving signal generator generates a driving signal in response to the square wave signal from the fundamental wave generator and the PWM signal from the PWM comparator. The driving circuit enables PWM controlling integrated circuits to be synchronized together.

摘要翻译： 在用于LCD背光的驱动电路中，基波发生器根据包括时间常数电容器的时间常数电路的时间常数产生三角波信号和方波信号。 PWM比较器将反馈电压和预设参考电压之间的差信号与三角波信号进行比较，以响应比较结果产生PWM信号。 信号同步器根据LCD背光源的功率电平设置时间常数电容器和基波发生器之间的连接节点和方波信号的输出端子。 此外，驱动信号发生器响应于来自基波发生器的方波信号和来自PWM比较器的PWM信号产生驱动信号。 驱动电路使得PWM控制集成电路能够同步在一起。

公开(公告)号：US20070228991A1

公开(公告)日：2007-10-04

申请号：US11695222

申请日：2007-04-02

申请人： Sang Cheol SHIN ,  Byoung Own MIN ,  Chang Woo HA ,  Jung Chul GONG

发明人： Sang Cheol SHIN ,  Byoung Own MIN ,  Chang Woo HA ,  Jung Chul GONG

IPC分类号： H05B39/04

CPC分类号： H05B41/386

摘要： An LCD backlight inverter includes a soft starter for generating a soft-start reference voltage gradually increasing as the driving power begins to be supplied. The LCD backlight inverter also includes a first error detector for receiving a first feedback voltage indicating the magnitude of driving current of the lamp and for comparing a smaller value out of a predetermined first reference voltage and the soft-start reference voltage with the first feedback voltage to generate a first error signal corresponding to the difference between the smaller value and the soft-start reference voltage. The LCD backlight inverter further includes a pulse width modulation comparator for comparing the first error signal and a triangle wave oscillation signal to output the pulse width modulation control signal with a predetermined duty ratio. The LCD backlight inverter prevents application of over-current and over-voltage to the LCD backlight to prolong the lifetime of the backlight.

摘要翻译： LCD背光逆变器包括软起动器，用于随着驱动电力开始供给而产生逐渐增加的软启动基准电压。 LCD背光逆变器还包括第一误差检测器，用于接收指示灯的驱动电流的大小的第一反馈电压，并且用于将预定的第一参考电压和软启动参考电压之间的较小值与第一反馈电压进行比较 以产生对应于较小值和软启动参考电压之间的差的第一误差信号。 LCD背光反相器还包括脉冲宽度调制比较器，用于比较第一误差信号和三角波振荡信号，以预定占空比输出脉宽调制控制信号。 LCD背光逆变器可防止对LCD背光产生过电流和过电压，延长背光源的使用寿命。

公开(公告)号：US20070182698A1

公开(公告)日：2007-08-09

申请号：US11565569

申请日：2006-11-30

申请人： Chang Woo HA ,  Sang Cheol Shin ,  Byoung Own Min

发明人： Chang Woo HA ,  Sang Cheol Shin ,  Byoung Own Min

IPC分类号： G09G3/36

CPC分类号： H05B33/0827 ,  G09G3/3406 ,  H05B33/0815 ,  Y02B20/347

摘要： Disclosed herein is a drive device of a color light emitting diode (LED) backlight, which is capable of precisely adjusting the forward voltages of color LED arrays for each channel.The drive device for driving the color light emitting diode (LED) backlight which includes a plurality of color LED arrays includes an I/O interface for inputting/outputting a signal, a control unit for controlling a driving voltage and driving current according to a brightness control signal output from the I/O interface, a DC/DC converter for converting an operation voltage into the driving voltage according to the driving voltage control of the control unit, a voltage regulator for regulating the driving voltage output from the DC/DC converter to a reference voltage without ripple, a multi-channel driving unit for converting the reference voltage output from the voltage regulator into forward voltages of the plurality of color LED arrays according to a plurality of control signals, and a current source for adjusting the amount of the driving current flowing in the color LED backlight according to the driving current control of the control unit.

摘要翻译： 这里公开了彩色发光二极管（LED）背光源的驱动装置，其能够精确地调整每个通道的彩色LED阵列的正向电压。 用于驱动包括多个彩色LED阵列的彩色发光二极管（LED）背光的驱动装置包括用于输入/输出信号的I / O接口，用于根据亮度控制驱动电压和驱动电流的控制单元 从I / O接口输出的控制信号，用于根据控制单元的驱动电压控制将工作电压转换为驱动电压的DC / DC转换器，用于调节从DC / DC转换器输出的驱动电压的电压调节器 到没有纹波的参考电压;多通道驱动单元，用于根据多个控制信号将从稳压器输出的参考电压转换成多个彩色LED阵列的正向电压;以及电流源，用于调节 根据控制单元的驱动电流控制在彩色LED背光中流动的驱动电流。

公开(公告)号：US20070182699A1

公开(公告)日：2007-08-09

申请号：US11566505

申请日：2006-12-04

申请人： Chang Woo HA ,  Byoung Own Min ,  Jeong In Cheon ,  Yu Jin Jang

发明人： Chang Woo HA ,  Byoung Own Min ,  Jeong In Cheon ,  Yu Jin Jang

IPC分类号： G09G3/36

CPC分类号： G09G3/3413 ,  G09G2310/0235 ,  G09G2320/064 ,  H05B33/0818 ,  Y02B20/347

摘要： In an FSC mode LCD, a controller operates in response to an external adjustment, and a DC/DC converter converts a battery voltage into a driving voltage under control of the controller. A color LED backlight includes first, second and third color LED arrays connected in parallel, which are operated by the driving voltage. An FSC generator generates first, second and third color PWM signals according to an internal sawtooth voltage and a dimming voltage. A 3-channel current source generates first, second and third driving currents under control of the controller, and on/off switches paths of the first, second and third driving currents flowing through the first, second and third color LED arrays according to the first, second and third color PWM signals generated from the FSC generator, thereby adjusting luminance of the first, second and third color LED arrays of the color LED backlight.

摘要翻译： 在FSC模式LCD中，控制器响应于外部调整而工作，并且DC / DC转换器在控制器的控制下将电池电压转换成驱动电压。 彩色LED背光包括由驱动电压操作的并联连接的第一，第二和第三彩色LED阵列。 FSC发生器根据内部锯齿电压和调光电压产生第一，第二和第三颜色PWM信号。 3通道电流源在控制器的控制下产生第一，第二和第三驱动电流，并且根据第一，第二和第三驱动电流在第一，第二和第三彩色LED阵列中的第一，第二和第三驱动电流的开/关 ，从FSC发生器产生的第二和第三颜色PWM信号，从而调整彩色LED背光的第一，第二和第三颜色LED阵列的亮度。

公开(公告)号：US20100271251A1

公开(公告)日：2010-10-28

申请号：US12765819

申请日：2010-04-22

申请人： Chang Woo HA ,  Sung Hoon Bea ,  Sang Heum Yeon

发明人： Chang Woo HA ,  Sung Hoon Bea ,  Sang Heum Yeon

IPC分类号： H03M1/50

CPC分类号： H03M1/504

摘要： An apparatus for transferring serial data (e.g., a serial interface using a single wire) generally includes a detector configured to detect a first level time period and a second level time period of an input signal, and a computing unit configured to compute a duty or duty cycle of the input signal and generate an output signal based on the duty or duty cycle.

摘要翻译： 用于传送串行数据的装置（例如，使用单线的串行接口）通常包括被配置为检测输入信号的第一电平时间段和第二电平时间段的检测器，以及计算单元，被配置为计算占空比 输入信号的占空比，并根据占空比或占空比生成输出信号。