公开(公告)号：US20060061849A1

公开(公告)日：2006-03-23

申请号：US11211685

申请日：2005-08-26

Applicant: Sang-hoon Lee ,  Hyun-surk Kim

Inventor： Sang-hoon Lee ,  Hyun-surk Kim

IPC: G02B26/08 ,  G02B5/08 ,  G02B7/182 ,  B41J27/00

CPC classification number: G02B1/18 ,  G02B5/09 ,  G02B26/12 ,  G02B27/0006

Abstract: A polygonal mirror unit is adapted to prevent contamination using a photocatalyst, a light scanning unit, and an image forming apparatus employing the polygonal mirror. The polygonal mirror unit is designed to prevent contamination of organic materials on a reflective surface. The polygonal mirror unit includes a driving device and a polygonal mirror having a reflective surface that is rotated by the driving device and deflects and scans an incident beam. The polygonal mirror has a main body with a plurality of reflective surfaces and photocatalytic layers formed on the plurality of reflective surfaces. The photocatalytic layers are activated by an incident beam of a predetermined wavelength to decompose organic materials on the reflective surfaces.

Abstract translation: 多棱镜单元适于使用光催化剂，光扫描单元和使用多面镜的图像形成装置来防止污染。 多面镜单元被设计成防止有机材料在反射表面上的污染。 多面镜单元包括驱动装置和多面镜，其具有由驱动装置旋转的偏转和扫描入射光束的反射表面。 所述多面镜具有主体，所述主体具有多个反射表面和形成在所述多个反射表面上的光催化层。 光催化层由预定波长的入射光束激发，以分解反射表面上的有机材料。

公开(公告)号：US06652077B2

公开(公告)日：2003-11-25

申请号：US10274049

申请日：2002-10-21

Applicant: Doo-jin Maeng ,  Yong-soo Oh ,  Sang-hoon Lee ,  Keon Kuk

Inventor： Doo-jin Maeng ,  Yong-soo Oh ,  Sang-hoon Lee ,  Keon Kuk

IPC: B41J205

CPC classification number: B41J2/15 ,  B41J2/14137 ,  B41J2002/1437

Abstract: A high-density ink-jet printhead, in which a plurality of nozzles, through which ink is ejected, are arrayed on an ink supply manifold in a plurality of rows is provided, wherein the ink-jet printhead includes a substrate; hemispherical ink chambers at a surface of the substrate; a manifold for supplying ink to the ink chambers; ink channels to be in flow communication with the ink chambers and the manifold; a nozzle plate monolithically formed with the substrate; nozzles formed on the nozzle plate, each formed to correspond to a center of each of the ink chambers; heaters formed on the nozzle plate, each having a ring shape and encircling a corresponding nozzle; and electrodes, positioned on the nozzle plate and electrically connected to the heaters, for applying current to the heaters, wherein the nozzles are arrayed on the manifold in at least in three rows, and preferably in five rows.

公开(公告)号：US06362593B1

公开(公告)日：2002-03-26

申请号：US09754085

申请日：2001-01-05

Applicant: Sang-hoon Lee

Inventor： Sang-hoon Lee

IPC: H02M7538

CPC classification number: H02P27/08 ,  H02P23/0077

Abstract: Disclosed is a method of compensating a dead time of a motor driving device comprising a current command generating unit generating a current command according to a predetermined algorithm, and a current controller generating a voltage command based on the current command, comprising the steps of measuring the voltage command while changing the current command; estimating a stator resistance value of the motor from the measured voltage command value; and compensating the dead time based on the estimated stator resistance value (R). Through these steps, since the effect due to the non-linearity of the switching devices is correctly compensated, the motor can be controlled more correctly with a low-speed.

Abstract translation: 公开了一种补偿电动机驱动装置的死区时间的方法，该电动机驱动装置包括根据预定算法产生电流指令的电流指令产生装置，以及基于该电流指令产生电压指令的电流控制器，包括以下步骤： 改变当前命令时的电压指令; 根据测量的电压指令值估计电动机的定子电阻值; 并基于所估计的定子电阻值（R）来补偿死区时间。 通过这些步骤，由于切换装置的非线性的效果被正确地补偿，所以能够以低速更正确地控制电动机。

公开(公告)号：US06283814B1

公开(公告)日：2001-09-04

申请号：US09162338

申请日：1998-09-28

Applicant: Sang-hoon Lee

Inventor： Sang-hoon Lee

IPC: H01J9236

CPC classification number: H01J9/142 ,  H01J2229/0716

Abstract: A flat cathode ray tube includes a front panel having an inner phosphor screen with a plurality of phosphor pixels and an inner edge side, a solid glass frame having a front side and a rear side, and a tensioned mask having a plurality of beam-guide holes corresponding to the phosphor pixels on the phosphor screen and an edge portion. The front panel is formed with a substantially flat shape. The front side of the solid glass frame is sealed to the edge side of the front panel. The edge portion of the tensioned mask is immersed in the solid glass frame. A funnel mounting a deflection yoke therearound and having a neck mounting an electron gun therewithin is sealed to the rear side of the glass frame. The phosphor screen of the front panel is formed by using a printing method.

Abstract translation: 平面阴极射线管包括前面板，其具有具有多个荧光体像素和内边缘侧的内部荧光屏，具有前侧和后侧的实心玻璃框架和具有多个波导管的张紧罩 与荧光屏上的荧光体像素对应的孔和边缘部分。 前面板形成有大致平坦的形状。 实心玻璃框架的前侧被密封到前面板的边缘侧。 将张力面罩的边缘部分浸入固体玻璃框架中。 在其周围安装偏转线圈并且在其中安装电子枪的颈部的漏斗被密封到玻璃框架的后侧。 前面板的荧光屏通过使用打印方法形成。

公开(公告)号：US5998958A

公开(公告)日：1999-12-07

申请号：US229962

申请日：1999-01-14

Applicant: Sang-hoon Lee

Inventor： Sang-hoon Lee

IPC: H02P21/00 ,  G01R31/34 ,  H02P27/04 ,  G01R27/00

CPC classification number: G01R31/343

Abstract: The resistance values of a stator and a rotor of an induction motor are estimated through the steps of (a) checking whether a control system of the induction motor reaches a normal state, (b) measuring normal state values of the values necessary for estimating resistance values of a stator and a rotor when the control system reaches a normal state, (c) estimating a stator resistance value based on the measured normal state values, (d) applying an AC component to a magnetic flux command input to the control system and calculating a first variable for estimating rotor resistance, (e) obtaining an AC component with respect to each variable by allowing the calculated first variable to pass through a band pass filter, (f) calculating a second variable for estimating rotor resistance based on the AC component with respect to the respective variables obtained above, and (g) estimating rotor resistance using the calculated second variable. Thus, since a stator resistance is estimated based on the condition of the generated torque at the time of estimating resistance of the induction motor and the rotor resistance is estimated through the AC component included in the current and voltage of the stator, the resistance values of the stator and the rotor which vary during the operation of the induction motor can be accurately estimated.

Abstract translation: 感应电动机的定子和转子的电阻值通过以下步骤来估计：（a）检查感应电动机的控制系统是否达到正常状态，（b）测量估计电阻所需的值的正常状态值 当控制系统达到正常状态时，定子和转子的值，（c）基于所测量的正常状态值估计定子电阻值，（d）将AC分量施加到输入到控制系统的磁通量指令，以及 计算用于估计转子电阻的第一变量，（e）通过允许所计算的第一变量通过带通滤波器来获得关于每个变量的AC分量，（f）基于AC计算用于估计转子电阻的第二变量 分量，以及（g）使用所计算的第二变量估计转子电阻。 因此，由于基于感应电动机的电阻估计时的产生转矩的条件来估计定子电阻，并且通过包含在定子的电流和电压中的交流分量来估计转子电阻，所以电阻值 可以精确地估计在感应电动机的操作期间变化的定子和转子。