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    • 6. 发明授权
    • Nitride semiconductor light emitting device
    • 氮化物半导体发光器件
    • US07470938B2
    • 2008-12-30
    • US10983637
    • 2004-11-09
    • Jae Hoon LeeJeong Wook LeeHyun Kyung KimYong Chun Kim
    • Jae Hoon LeeJeong Wook LeeHyun Kyung KimYong Chun Kim
    • H01L29/06H01L31/0328H01L31/0336H01L31/072H01L31/109H01L29/24H01L33/00H01L29/22H01L21/00
    • H01L33/32H01L33/007H01L33/22Y10S257/918
    • In a nitride semiconductor light emitting device having patterns formed on the upper and lower surfaces of a substrate from which light is emitted in a flip chip bonding structure, the patterns are capable of changing light inclination at the upper and lower surfaces of the substrate to decrease total reflection at the interfaces, thereby improving light emitting efficiency. The device includes a substrate having upper and lower surfaces on which predetermined patterns are formed such that light can be incident within a critical angle, the substrate allowing a gallium nitride-based semiconductor material to be grown thereon, an n-type nitride semiconductor layer formed on the upper surface of the substrate, an active layer formed on the upper surface of the n-type nitride semiconductor layer such that the n-type nitride semiconductor layer is partially exposed, a p-type nitride semiconductor layer formed on the upper surface of the active layer, a p-electrode formed on the upper surface of the p-type nitride semiconductor layer, and an n-side electrode formed on the partially exposed n-type nitride semiconductor layer.
    • 在具有形成在基板的上表面和下表面上的图案的氮化物半导体发光器件中,以倒装芯片接合结构发射光,该图案能够改变在基板的上表面和下表面处的光倾斜度 在界面处的全反射,从而提高发光效率。 该装置包括具有上表面和下表面的基板,预定图案形成在其上,使得光可以临界角入射,所述基板允许在其上生长氮化镓基半导体材料,形成n型氮化物半导体层 在所述基板的上表面上形成有在n型氮化物半导体层的上表面上形成的n型氮化物半导体层被部分露出的有源层,形成在所述n型氮化物半导体层的上表面上的p型氮化物半导体层 有源层,形成在p型氮化物半导体层的上表面上的p电极和形成在部分暴露的n型氮化物半导体层上的n侧电极。
    • 8. 发明授权
    • Power factor correction circuit for reducing distortion of input current
    • 用于减少输入电流失真的功率因数校正电路
    • US08320144B2
    • 2012-11-27
    • US12674618
    • 2008-08-22
    • Jae Hoon Lee
    • Jae Hoon Lee
    • H02M7/757H02M7/758
    • G05F1/70
    • The present invention relates to a power factor correction circuit that can reduce distortion of input current in a switching mode power supply. The power factor correction circuit provided in the present invention basically comprises a first inductor which is electrically connected at a first end thereof to an input terminal, a second coil that is coupled to the first inductor to form an induced voltage, a switch electrically connected to the a second terminal of the first inductor, and a switching control unit for controlling turn-on and turn-off of the switch. In such a power factor correction circuit of the present invention, the switching control unit is configured to differently set a turn-on period of the switch depending on the input voltage by generating a signal for controlling the turn-off of the switch using a second coil voltage induced at the secondary coil of the inductor by input voltage or a directly sensed input voltage. Accordingly, distortion of input current can be effectively corrected.
    • 本发明涉及能够减少开关模式电源中的输入电流的失真的功率因数校正电路。 本发明提供的功率因数校正电路基本上包括:第一电感器,其第一端电连接到输入端子;第二线圈,其耦合到第一电感器以形成感应电压;开关,电连接到 第一电感器的第二端子和用于控制开关的接通和断开的开关控制单元。 在本发明的这种功率因数校正电路中,开关控制单元被配置为根据输入电压不同地设置开关的导通周期,通过产生用于控制开关的关断的信号,使用第二 通过输入电压或直接感应的输入电压在电感的次级线圈感应的线圈电压。 因此,可以有效地校正输入电流的失真。
    • 9. 发明授权
    • Apparatus for easing impact on boom of excavator and method of controlling the same
    • 减轻对挖掘机吊臂影响的装置及其控制方法
    • US07934377B2
    • 2011-05-03
    • US11977650
    • 2007-10-25
    • Dong Soo KimJae Hoon LeeChun Seung LeeJae Hong KimJoong Seon JohEun Tae Jeung
    • Dong Soo KimJae Hoon LeeChun Seung LeeJae Hong KimJoong Seon JohEun Tae Jeung
    • F16D31/02
    • E02F9/2207E02F9/2285E02F9/2292F15B21/008F15B21/087F15B2211/20538F15B2211/20592F15B2211/3144F15B2211/329F15B2211/36F15B2211/6054F15B2211/6313F15B2211/6316F15B2211/6346F15B2211/7053F15B2211/8616
    • An apparatus for easing an impact on a boom of an excavator and a method of controlling the same are disclosed, which can minimize the vibration occurring in the boom due to the impact on a boom cylinder by actively controlling an amount of hydraulic fluid being supplied to the boom cylinder when the operation of the boom cylinder is suddenly stopped due to an operator's sudden manipulation of an operation lever for a working device. The apparatus includes first and second hydraulic pumps; a boom cylinder; a main control valve; an operation lever for supplying pilot signal pressure to a spool of the main control valve when an operator manipulates the operation lever; operation lever detection means for detecting boom up and boom down signal pressures according to an amount of manipulation of the operation lever; boom cylinder pressure detection means for detecting pressures generated in a large chamber and a small chamber of the boom cylinder; a controller for calculating and outputting a control signal of the main control valve if the boom cylinder has been suddenly stopped; and boom vibration preventing means for controlling the pilot signal pressure being supplied from the second hydraulic pump to the main control valve.
    • 公开了一种用于减轻对挖掘机的起重臂的冲击的装置及其控制方法,其可以通过主动地控制供给至动臂的液压流体的量来最小化由于对动臂缸的冲击而引起的动臂中产生的振动 当操作者突然操作用于工作装置的操作杆时,动臂缸的操作突然停止时的动臂缸。 该装置包括第一和第二液压泵; 动臂缸; 主控阀; 操作杆,用于当操作者操作操作杆时,将主控信号压力提供给主控制阀的阀芯; 操作杆检测装置,用于根据操作杆的操纵量检测吊杆上升和吊杆下降信号压力; 用于检测在动臂缸的大室和小室中产生的压力的动臂缸压力检测装置; 控制器,用于如果动臂缸突然停止则计算和输出主控制阀的控制信号; 以及用于控制从第二液压泵供给至主控制阀的先导信号压力的起重臂振动防止装置。