公开(公告)号：US20090227445A1

公开(公告)日：2009-09-10

申请号：US12276782

申请日：2008-11-24

Applicant: Jae Seung Lee ,  Yung-Eun Sung ,  Yong-Hun Cho ,  Tae Yeol Jeon

Inventor： Jae Seung Lee ,  Yung-Eun Sung ,  Yong-Hun Cho ,  Tae Yeol Jeon

IPC: H01M4/92

CPC classification number: H01M4/921 ,  H01M4/926 ,  H01M2008/1095

Abstract: A method of preparing a platinum alloy catalyst for a fuel cell electrode includes: (a) adding a carbon material, a platinum precursor, and a transition metal precursor to ethanol and dispersing the mixture; (b) adding sodium acetate powder or an ammonia solution containing ethanol as a solvent to the solution obtained in step (a) and stirring the resulting solution; (c) adding sodium borohydride to the solution obtained in step (b) and reducing the metal ions of the platinum precursor and the transition metal precursor; and (d) obtaining a platinum alloy catalyst in the form of powder through washing and drying processes. This method can reduce the amount of platinum to be used for manufacturing a fuel cell electrode and thereby reduce the manufacturing cost.

Abstract translation: 一种制备用于燃料电池电极的铂合金催化剂的方法包括：（a）向乙醇中加入碳材料，铂前体和过渡金属前体并分散混合物; （b）将乙酸钠粉末或含有乙醇的氨溶液作为溶剂加入到步骤（a）中获得的溶液中并搅拌所得溶液; （c）向步骤（b）中获得的溶液中加入硼氢化钠并还原铂前体和过渡金属前体的金属离子; 和（d）通过洗涤和干燥方法获得粉末形式的铂合金催化剂。 该方法可以减少用于制造燃料电池电极的铂的量，从而降低制造成本。

公开(公告)号：US20080224788A1

公开(公告)日：2008-09-18

申请号：US11913113

申请日：2006-05-04

Applicant: Sang Jin Park ,  Yong Hun Cho ,  Yun Do Kim

Inventor： Sang Jin Park ,  Yong Hun Cho ,  Yun Do Kim

IPC: H03K7/08

CPC classification number: H04L25/4902 ,  H03F3/217 ,  H03K7/08

Abstract: There is provided a method and apparatus for output pulse width modulation in a digital amplifier including: a determining step of adding or subtracting a value corresponding to a predetermined offset to or from an input audio signal alternately according to a period of the input audio signal, thereby determining a sign of a resulting value of adding or subtracting; a switching step of outputting the input audio signal to a first port when the determined sign is positive, and outputting the input audio signal to a second port after inverting the input audio signal into a positive number when the determined sign is negative; an adjusting step of adding a value corresponding to a pulse width for a minimum time required for switching to the audio signals output from the first port and the second port, and outputting a resulting value of adding; and a modulating step of performing pulse width modulation on the audio signals output from the adjusting step and outputting a first modulation signal and a second modulation signal. Accordingly, it is possible to reduce residual noises output from the switching amplifier and bias currents applied to load, so that heat generation decreases and amplification efficiency increases.

Abstract translation: 提供了一种数字放大器输出脉冲宽度调制方法和装置，包括：根据输入音频信号的周期交替地向输入音频信号输入或从输入音频信号中减去与预定偏移相对应的值的确定步骤， 从而确定加法或减法的结果值的符号; 切换步骤，当确定的符号为正时，将输入的音频信号输出到第一端口，并且当所确定的符号为负时，将输入的音频信号输出到第二端口，将输入的音频信号反相为正数; 调整步骤，将与从所述第一端口和所述第二端口输出的音频信号切换所需的最小时间相对应的脉冲宽度的值相加，并输出所得到的加法值; 以及对从调整步骤输出的音频信号进行脉宽调制并输出第一调制信号和第二调制信号的调制步骤。 因此，可以减少从开关放大器输出的残余噪声和施加到负载的偏置电流，使得发热降低并且放大效率增加。

公开(公告)号：US5963665A

公开(公告)日：1999-10-05

申请号：US813425

申请日：1997-03-10

Applicant: Young-taek Kim ,  Yong-hun Cho

Inventor： Young-taek Kim ,  Yong-hun Cho

IPC: H04N5/57 ,  G06T5/00 ,  G06T5/40 ,  G06K9/38

CPC classification number: G06T5/009 ,  G06T5/40

Abstract: An image enhancing method using a mean-separate histogram equalization method is disclosed. An input image signal is divided into two sub-images in a picture unit according to a mean level of the input image signal. Then, cumulative density functions for each of the sub-images are calculated. Afterwards, the input sample is mapped into two gray levels, each of which belongs to a first range and a second range, by using first and second transform functions defined by use of the cumulative density functions, respectively. Finally, one of two mapped levels is selected depending on the magnitude of the input sample. As a result, the brightness of the given image can be preserved while the contrast is enhanced.

Abstract translation: 公开了一种使用均值分离直方图均衡方法的图像增强方法。 输入图像信号根据输入图像信号的平均电平被划分成图像单元中的两个子图像。 然后，计算每个子图像的累积密度函数。 之后，通过使用通过使用累积密度函数定义的第一和第二变换函数，将输入样本映射成两个灰度级，每个灰度级属于第一范围和第二范围。 最后，根据输入样本的大小选择两个映射级别之一。 结果，在增强对比度的同时可以保持给定图像的亮度。

公开(公告)号：US5786862A

公开(公告)日：1998-07-28

申请号：US723118

申请日：1996-09-30

Applicant: Yeong-Taeg Kim ,  Yong-Hun Cho

Inventor： Yeong-Taeg Kim ,  Yong-Hun Cho

IPC: H04N7/01 ,  H04N7/015

CPC classification number: H04N7/012 ,  H04N7/015

Abstract: A method for interpolating pixel data of an omitted line by use of pixel data from an interlaced scan and an apparatus therefor are described. The pixel interpolation method and apparatus efficiently interpolate edges having various slopes according to a degree of correlation. When an edge has a gentle slope due to extensive correlation, interpolation is performed using a wide-vector. When an error occurs due to high-frequency components such as when bidirectional edges are found, simple vertical interpolation is performed.

Abstract translation: 描述了通过使用来自隔行扫描的像素数据及其装置来内插省略的行的像素数据的方法。 像素插值方法和装置根据相关度有效地内插具有各种斜率的边。 由于广泛的相关性，当边缘具有平缓的斜率时，使用宽向量进行插值。 当发现由于诸如当发现双向边缘的高频分量而发生错误时，执行简单的垂直内插。

公开(公告)号：US08119306B2

公开(公告)日：2012-02-21

申请号：US11287443

申请日：2005-11-28

Applicant: Kyoung Hwan Choi ,  Jong-koo Lim ,  Yong-hun Cho ,  Il Moon

Inventor： Kyoung Hwan Choi ,  Jong-koo Lim ,  Yong-hun Cho ,  Il Moon

IPC: H01M8/02 ,  H01M8/10 ,  H01M8/04

CPC classification number: H01M8/2455 ,  H01M8/0258 ,  H01M8/0263 ,  H01M8/1009 ,  H01M8/241

Abstract: A bipolar plate and a direct liquid feed fuel cell stack are provided. The bipolar plate includes a manifold that is coupled with the fuel/oxidant path holes and a plurality of flow channels that are coupled with the manifold. The flow channels are divided into a plurality of groups, where the flow channel of each group forms a serpentine flow path and a length of each flow channel is substantially the same.

Abstract translation: 提供了双极板和直接液体进料燃料电池堆。 双极板包括与燃料/氧化剂通道孔耦合的歧管和与歧管联接的多个流动通道。 流动通道被分成多个组，其中每组的流动通道形成蛇形流动路径，并且每个流动通道的长度基本相同。

公开(公告)号：US07951506B2

公开(公告)日：2011-05-31

申请号：US11272077

申请日：2005-11-14

Applicant: Kyoung Hwan Choi ,  Jong-koo Lim ,  Yong-hun Cho ,  Il Moon

Inventor： Kyoung Hwan Choi ,  Jong-koo Lim ,  Yong-hun Cho ,  Il Moon

IPC: H01M8/04

CPC classification number: H01M8/026 ,  H01M8/0258 ,  H01M8/0263 ,  H01M8/0265 ,  H01M8/241 ,  H01M8/2455

Abstract: A bipolar plate for fuel cells includes a plurality of flow paths in which fuel flows. The flow paths include a first flow path formed by a plurality of flow channels and a second flow path formed by a plurality of islands. A direct liquid fuel cell stack comprises the bipolar plate.

Abstract translation: 用于燃料电池的双极板包括燃料流过的多个流路。 流路包括由多个流路形成的第一流路和由多个岛形成的第二流路。 直接液体燃料电池堆包括双极板。

公开(公告)号：US5833442A

公开(公告)日：1998-11-10

申请号：US751018

申请日：1996-11-15

Applicant: Wan Pyo Park ,  Hiun Won ,  Do Sig Choi ,  Yong Hun Cho

Inventor： Wan Pyo Park ,  Hiun Won ,  Do Sig Choi ,  Yong Hun Cho

IPC: F04C27/00 ,  F04C18/04

CPC classification number: F04C27/005

Abstract: A scroll-type compressor has a scroll plate with at least first and second pressure equalizing passages formed in its end plate such that the first and second pressure equalizing passages will be in the same crescent shaped pocket during at least a portion of a crescent shaped pocket's radially inward movement. The minimum pressure in a back pressure pocket will be adequate to maintain a good seal, any pressure increases will increase in accordance with the increased pressure in the crescent shaped pockets. At no point are both of the pressure equalizing passages blocked and, therefore, the pressure in the interior space does not overwhelm the effective functioning of the back pressure pocket.

Abstract translation: 涡旋式压缩机具有涡旋板，其具有形成在其端板中的至少第一和第二压力平衡通道，使得第一和第二压力平衡通道在新月形口袋的至少一部分期间将在相同的新月形口袋中 径向向内运动。 背压袋中的最小压力将足以保持良好的密封，任何压力增加将根据新月形口袋中增加的压力而增加。 在任何时候压力平衡通道都不会阻塞，因此内部空间中的压力不会压倒背压袋的有效功能。

公开(公告)号：US09123965B2

公开(公告)日：2015-09-01

申请号：US12775062

申请日：2010-05-06

Applicant: Nak Hyun Kwon ,  Inchul Hwang ,  Jae Seung Lee ,  Yung-Eun Sung ,  Tae-Yeol Jeon ,  Sung Jong Yoo ,  Kug-Seung Lee ,  Yong-Hun Cho

Inventor： Nak Hyun Kwon ,  Inchul Hwang ,  Jae Seung Lee ,  Yung-Eun Sung ,  Tae-Yeol Jeon ,  Sung Jong Yoo ,  Kug-Seung Lee ,  Yong-Hun Cho

IPC: H01M4/92 ,  H01M4/88 ,  H01M4/86

CPC classification number: H01M4/92 ,  H01M4/8663 ,  H01M4/885 ,  H01M4/926 ,  Y02E60/50

Abstract: The present invention provides a method of synthesizing a nano-sized transition metal catalyst on a carbon support, including dissolving a stabilizer in ethanol thus preparing a mixture solution, adding a support to the mixture solution thus preparing a dispersion solution, dissolving a transition metal precursor in ethanol thus preparing a precursor solution, mixing the precursor solution with the dispersion solution with stirring, and then performing reduction, thus preparing the nano-sized transition metal catalyst. This method enables the synthesis of transition metal nanoparticles supported on carbon powder having a narrow particle size distribution and a wide degree of dispersion through a simple process, and is thus usefully applied to the formation of an electrode material or the like of a fuel cell.

Abstract translation: 本发明提供了一种在碳载体上合成纳米尺寸的过渡金属催化剂的方法，包括将稳定剂溶解在乙醇中，从而制备混合溶液，向混合溶液中加入载体，从而制备分散液，将过渡金属前体 在乙醇中制备前体溶液，在搅拌下将前体溶液与分散液混合，然后进行还原，从而制备纳米尺寸的过渡金属催化剂。 该方法能够通过简单的工艺合成负载在碳粉末上的过渡金属纳米粒子，其具有窄的粒度分布和宽的分散度，因此有利地用于燃料电池的电极材料等的形成。

公开(公告)号：US20110318668A1

公开(公告)日：2011-12-29

申请号：US13073460

申请日：2011-03-28

Applicant: Eon Soo Lee ,  Yung Eun Sung ,  Min Jeh Ahn ,  Yong Hun Cho ,  Nam Gee Jung ,  Jae Hyuk Jang

Inventor： Eon Soo Lee ,  Yung Eun Sung ,  Min Jeh Ahn ,  Yong Hun Cho ,  Nam Gee Jung ,  Jae Hyuk Jang

IPC: H01M8/04 ,  H01M8/00 ,  B05D5/12 ,  H01M8/10

CPC classification number: H01M4/8807 ,  H01M8/0232 ,  H01M8/0245 ,  H01M8/1004 ,  Y02P70/56

Abstract: Disclosed herein are a membrane-electrode assembly for a fuel cell, a fuel cell, and a manufacturing method thereof. The present invention forms a micro current collecting layer between a gas diffusion layer and a micro porous layer and surface-contacts a pair of laminates for an electrode so that each electrolyte layer formed by applying an electrolyte solution thereon contacts with each other, thereby shortening a moving distance of electrons to minimize the current collecting resistance and loss and reduce the interface resistance.

Abstract translation: 本文公开了一种用于燃料电池的膜 - 电极组件，燃料电池及其制造方法。 本发明在气体扩散层和微孔层之间形成微电流收集层，并且与电极的一对层压体表面接触，使得通过施加电解质溶液形成的每个电解质层彼此接触，从而缩短 电子的移动距离使集电电阻和损耗最小化，并降低界面电阻。

公开(公告)号：US07825057B2

公开(公告)日：2010-11-02

申请号：US11985810

申请日：2007-11-16

Applicant: Nak Hyun Kwon ,  Yung Eun Sung ,  In Su Park ,  Yong Hun Cho ,  In Chul Hwang ,  Il Hee Cho

Inventor： Nak Hyun Kwon ,  Yung Eun Sung ,  In Su Park ,  Yong Hun Cho ,  In Chul Hwang ,  Il Hee Cho

IPC: B01J23/40 ,  B01J23/74 ,  B01J23/00 ,  B01J23/42 ,  B01J23/44 ,  C22C5/04 ,  C22C30/00 ,  H01M4/88 ,  H01M4/00

CPC classification number: H01M4/921 ,  H01M4/926 ,  H01M2008/1095

Abstract: The present invention relates to a process for preparing electrode catalyst materials for a polymer electrolyte membrane fuel cell (PEMFC), and particularly to a high-performance platinum-non-platinum mixed electrode catalyst (Pt—RuOs/C) having a physically mixed structure of RuOs alloy and platinum materials, which is prepared by adding a small amount of platinum (Pt) to RuOs alloy materials highly dispersed on a carbon support, where the amount of platinum used is drastically reduced as compared to the conventional platinum materials, thus lowering the manufacturing cost.

Abstract translation: 本发明涉及一种制备聚合物电解质膜燃料电池（PEMFC）的电极催化剂材料的方法，特别涉及具有物理混合结构的高性能铂 - 非铂混合电极催化剂（Pt-RuO / C） 的RuO合金和铂材料，其通过向高度分散在碳载体上的RuO合金材料添加少量铂（Pt）而制备，其中与常规铂材料相比，所使用的铂的量显着降低，因此降低 制造成本。