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1. 发明授权

US08054283B2 Liquid crystal display and backlight unit using light emitting diode driving circuit 有权
标题翻译：液晶显示器和背光单元采用发光二极管驱动电路
公开(公告)号：US08054283B2
公开(公告)日：2011-11-08
申请号：US11872908
申请日：2007-10-16
申请人： Sang Gil Lee , Tae Seok Jang , Sang Hoon Lee
发明人： Sang Gil Lee , Tae Seok Jang , Sang Hoon Lee
IPC分类号： G09G3/36
CPC分类号： H05B33/0818 , G09G3/32 , G09G3/3406 , G09G2320/064 , G09G2330/025 , Y02B20/341 , Y02B20/346
摘要： An “LED” driving circuit comprises an “LED” driving voltage generator which generates an “LED” driving voltage, a pulse width modulation (“PWM”) control unit which outputs a “PWM” signal having a predetermined duty ratio, and a main switching unit which controls the driving voltage applied to the “LEDs” in accordance with the “PWM” signal. Further, the “PWM” control unit comprises a controller including an error amplifier which detects an error between a reference voltage and a driving voltage and amplifies the detected error, an oscillator which outputs a pulse signal having a predetermined oscillation frequency, and a comparator which compares the pulse signal output from the oscillator with an output voltage from the error amplifier to generate a “PWM” signal; and a high frequency damper connected to the main switching unit to prevent malfunction of the controller due to noise. A backlight unit and liquid crystal display incorporate the “LED” driving circuit.
摘要翻译： “LED”驱动电路包括产生“LED”驱动电压的“LED”驱动电压发生器，输出具有预定占空比的“PWM”信号的脉冲宽度调制（“PWM”）控制单元，开关单元，其根据“PWM”信号控制施加到“LED”的驱动电压。此外，“PWM”控制单元包括控制器，该控制器包括检测参考电压和驱动电压之间的误差并放大检测到的误差的误差放大器，输出具有预定振荡频率的脉冲信号的振荡器和比较器，将来自振荡器的脉冲信号输出与来自误差放大器的输出电压进行比较以产生“PWM”信号; 以及连接到主开关单元的高频阻尼器，以防止由于噪声导致的控制器的故障。背光单元和液晶显示器包含“LED”驱动电路。

2. 发明授权

US06571099B1 Cell searching method in asynchronous wideband code division multiple access system 有权
标题翻译：异步宽带码分多址系统中的小区搜索方法
公开(公告)号：US06571099B1
公开(公告)日：2003-05-27
申请号：US09426852
申请日：1999-10-26
申请人： Il Kyu Kim , Sang Wook Ha , Byoung Woo Lim , Sang Gil Lee
发明人： Il Kyu Kim , Sang Wook Ha , Byoung Woo Lim , Sang Gil Lee
IPC分类号： H04L900
CPC分类号： H04B1/7083
摘要： A method for quickly searching a cell at a mobile station by using a synchronization channel structure of a forward link in a code division multiple access system which operates by an asynchronous mode between base stations is provided. In the method, a predetermined starting point among a plurality of locations of sync channel codes in a frame with respect to a base station having a minimal channel loss is obtained. Long code group and frame sync information at the mobile station are obtained based on outputs of a matched filter every mini slot clock location for one frame time after a starting point of a current mini slot. A long code based on the obtained long code group and frame sync information obtained is detected wherein the long code is used for band-spreading of a forward link by a current base station.
摘要翻译：提供了一种通过在基站之间通过异步模式操作的码分多址系统中的前向链路的同步信道结构来快速搜索移动台的小区的方法。在该方法中，获得相对于具有最小信道损失的基站的帧中的同步信道码的多个位置中的预定起始点。基于当前迷你时隙起始点之后一帧时间的每个迷你时隙时钟位置的匹配滤波器的输出，获得移动台上的长码组和帧同步信息。检测基于获得的长码组和获得的帧同步信息的长码，其中长码用于当前基站的前向链路的频带扩展。

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