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    • 21. 发明申请
    • LED DRIVING DEVICE
    • LED驱动装置
    • US20120212146A1
    • 2012-08-23
    • US13109535
    • 2011-05-17
    • Bo Hyun HWANGJung Sung KwonJung Hyun KimSeung Kon KongJae Shin LeeJoon Youp Sung
    • Bo Hyun HWANGJung Sung KwonJung Hyun KimSeung Kon KongJae Shin LeeJoon Youp Sung
    • H05B37/02
    • H05B33/0827H05B33/0842
    • Disclosed herein is a light emitting diode (LED) driving device for driving a multi-channel LED element or an LED array for each channel, the LED driving device including: a constant current driver driving currents flowing in each channel; a first switching unit selectively feeding-back voltage levels of each channel; and a switching controller controlling the turn on/off of the first switching unit, wherein matching characteristics of currents flowing in each channel is improved and a size of an integrated circuit (IC) chip is also reduced as compared to a case according to the related art, thereby making it possible to reduce a production cost and satisfy the trend of miniaturization of the chip, while solving a performance deterioration problem due to degradation of the matching of the currents between the channels.
    • 本发明公开了一种用于驱动每个通道的多通道LED元件或LED阵列的发光二极管(LED)驱动装置,该LED驱动装置包括:驱动在每个通道中流动的电流的恒流驱动器; 第一开关单元选择性地反馈每个通道的电压电平; 以及控制第一开关单元的接通/断开的开关控制器,其中改善了在每个通道中流动的电流的匹配特性,并且与根据相关的情况相比,集成电路(IC)芯片的尺寸也降低 从而可以降低生产成本并满足芯片小型化的趋势,同时解决由于通道之间的电流匹配劣化引起的性能劣化问题。
    • 25. 发明授权
    • Method of preparing water-dispersible poly (urethane-urea) having aromatic-aliphatic isocyanate
    • 制备具有芳族 - 脂族异氰酸酯的水分散性聚氨酯脲的方法
    • US07193011B2
    • 2007-03-20
    • US10874327
    • 2004-06-24
    • Jung Hyun KimIn Woo CheongKyoung Min Ahn
    • Jung Hyun KimIn Woo CheongKyoung Min Ahn
    • C08J3/00C08K3/20C08L75/00C08G18/00C08G18/10
    • C08G18/12C08G18/0823C08G18/6659C08G18/73C08G18/3228C08G18/755
    • The present invention relates to a method of preparing water-dispersible poly (urethane-urea) having aliphatic-aromatic isocyanate, more particularly to a method of preparing water-dispersible poly (urethane-urea) having aliphatic-aromatic isocyanate, with improved mechanical/thermal properties, such as heat resistance, chemical resistance and adhesion, good cost competitiveness and environmental friendliness, by reacting polyester polyol, dimethylol propionic acid and an aromatic isocyanate compound to obtain a hydroxyl (OH)-terminated prepolymer, adding an aliphatic isocyanate compound to said OH-terminated prepolymer to obtain an isocyanate (NCO)-terminated prepolymer wherein aromatic-aliphatic isocyanate is hybridized, neutralizing, water-dispersing and chain extending said NCO-terminated prepolymer.
    • 本发明涉及一种制备具有脂族 - 芳族异氰酸酯的水分散性聚氨酯脲的方法,更具体地涉及制备具有脂肪族 - 芳族异氰酸酯的水分散性聚(氨基甲酸酯 - 尿素)的方法,其具有改进的机械/ 通过使聚酯多元醇,二羟甲基丙酸和芳族异氰酸酯化合物反应得到羟基(OH) - 终止的预聚物,加入脂族异氰酸酯化合物,加入脂族异氰酸酯化合物,加入脂肪族异氰酸酯化合物,得到热稳定性,耐化学性和粘合性,良好的成本竞争力和环境友好性 所述OH-封端的预聚物得到异氰酸酯(NCO)的预聚物,其中芳族 - 脂族异氰酸酯被杂化,中和,水分散和扩链所述NCO封端的预聚物。
    • 28. 发明授权
    • Power amplifier
    • 功率放大器
    • US08779860B2
    • 2014-07-15
    • US13586218
    • 2012-08-15
    • Moon Suk JeonJung Rin WooSang Hwa JungJung Hyun KimYoung Kwon
    • Moon Suk JeonJung Rin WooSang Hwa JungJung Hyun KimYoung Kwon
    • H03F1/22
    • H03F1/223H03F1/0222H03F2200/102H03F2200/18
    • A power amplifier comprises a common source amplification stage and a first common gate amplification stage. The common source amplification stage includes a common source transistor for receiving a radio frequency (RF) input signal via a gate. The first common gate amplification stage is connected in cascode between a variable supply voltage source and the common source amplification stage, and amplifies an output of the common source amplification stage. The first common gate amplification stage includes a first common gate transistor, and a first gate bias controller configured to generate a first divided voltage based on a variable supply voltage of the variable supply voltage source, and to supply a first gate bias voltage generated by buffering the first divided voltage to a gate of the first common gate transistor.
    • 功率放大器包括公共源极放大级和第一公共栅极放大级。 公共源极放大级包括用于经由栅极接收射频(RF)输入信号的公共源极晶体管。 第一公共栅极放大级以可变电源电压源和公共源极放大级之间的级联连接,并放大公共源极放大级的输出。 第一公共栅极放大级包括第一公共栅极晶体管和第一栅极偏置控制器,其被配置为基于可变电源电压源的可变电源电压产生第一分压,并且提供由缓冲产生的第一栅极偏置电压 第一公共栅极晶体管的栅极的第一分压。
    • 30. 发明申请
    • POWER SUPPLY APPARATUS
    • 电源设备
    • US20130088803A1
    • 2013-04-11
    • US13372417
    • 2012-02-13
    • Jung Hyun KimJung Chul Gong
    • Jung Hyun KimJung Chul Gong
    • H02H9/02
    • H02H3/021H02H3/093H02H7/122
    • The present invention relates to a power supply apparatus including: a converting unit for converting an applied voltage into a predetermined level; a switching unit opened or closed to control current flowing in the converting unit; a detecting unit for detecting occurrence of overcurrent when a voltage applied to the switching unit is higher than a preset reference voltage; and a control unit for performing a protection operation when the overcurrent is detected more than a predetermined number of times within a predetermined time from when the overcurrent is detected and can prevent malfunction due to noises.
    • 本发明涉及一种电源装置,包括:转换单元,用于将施加的电压转换成预定电平; 开关单元打开或关闭以控制在转换单元中流动的电流; 检测单元,用于在施加到所述开关单元的电压高于预设参考电压时检测过电流的发生; 以及控制单元,用于当在检测到过电流之后的预定时间内检测到过电流超过预定次数时执行保护操作,并且可以防止由于噪声而导致的故障。