• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2005년도 전기학술대회논문집
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• pp.388-394
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• 2005

A typical honeycomb sandwich panel consists of two thin, high-strength facings bonded to a thick, light-weight core. Each component by itself is relatively weak and flexible, but when it combind in a sandwich panel they produce a structure that is stiff, strong, and lightweight. In addition to use in honeycomb sandwich panels, honeycomb is used for energy absorption, radio frequency shielding, light diffusion, and to direct air flow.Accordingly, the usage of honeycomb sandwich structure is very widely applied to the aircraft, the automobile, and marine industry, etc., because of these advantages. Generally, this honeycomb sandwich structure is manufactured by autoclave process.In this study, the honeycomb sandwich structure was produced by prepreg. To prove the suitability the honeycomb sandwich structure with prepreg, The optimum design of the skin materials and honeycomb sandwich structure were evaluated with the theory of stress analysis.

• 한국진공학회지
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• 제15권3호
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• pp.241-245
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• 2006

본 연구에서는 대면적 플라즈마 공정에 적용 가능한 고밀도 플라즈마를 발생시키기 위하여 기존의 내장형 serpentine-type 안테나와 새롭게 고안된 내장형 유도결합형 multiple U-Type 안테나를 1020mm X 920mm(기판 880 X 660mm)의 챔버에서 연구하였다. 내장형 유도결합형 multiple U-type을 적용한 플라즈마는 serpentine-type과 비교하여 더 높은 플라즈마 밀도, 높은 radical 밀도, 좋은 균일도를 관찰할 수 있었다. 이는 serpentine-type의 경우와 비교하여 보다 적은 정상파 효과와 높은 유도결합에 기인한다. 내장형 유도결합형 multiple U-type 안테나의 적용으로 $2\times10^{11}/cm^3$의 높은 플라즈마 밀도를 얻을 수 있었고 5000W의 입력전압과 Ar 가스 15mTorr 공정압력조건에서 4%의 균일도를 관찰할 수 있었다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1253-1256
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• 2007

A display device combining plasma display panel (PDP) and field emission display (FED) is proposed to achieve high luminous efficiency. The device can avoid the main energy loss channels of both PDP (ion loss) and FED (low CL efficiency). $2{\sim}6$”-diagonal test panels with carbon nano-tube (CNT) electron emitter and Xenon ambient gas showed the luminous efficiency of 4.14lm/W and brightness of $263cd/m^2$ at 35V (1kHz, 1% duty), indicating that it is a good candidate for the low voltage driven, highly efficient next generation display.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1229-1232
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• 2005

We report the method of preventing the grey color of Bi based glass frits caused by reduction of $Bi_2O_3$. To prevent reduction of $Bi_2O_3$, we controlled the melting temperature. Low melting temperature reduces the reduction of $Bi_2O_3$ and that makes clarity transparent glass cullets. After firing, glass frits that melted at lower temperature showed better transparency. To prevent the browning, we used some additives like CuO, $CeO_2$, CoO and $TiO_2$. The colors of glass cullets were varied according to additives. After firing, dielectric layer contained additives showed better transparency than the one without additives. In the point of reaction between dielectric layer and Ag electrode, CuO was the most effective additive in preventing the yellowing.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 제14회 신호처리 합동 학술대회 논문집
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• pp.531-534
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• 2001

본 논문에서는 plasma display panel에서 제한된 개수의 subfield를 사용하여 gradation을 표현함으로써 발생하는 dynamic false contour 등의 화질 열화를 개선할 수 있는 방법에 관하여 고찰한다. 먼저, 화질의 최종판단자인 인간 시각시스템의 특성과 subfield의 밝기 변화 특성 등을 고려하여 제한된 개수의 subfield로 최적의 화질을 얻을 수 있는 subfield pattern을 제시한다. 또한, 비교적 적은 양의 계조값 변화에서도 견실한 특성을 보일 수 있는 방법을 제시하였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2008년도 하계학술대회 논문집
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• pp.446-448
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• 2008

A new plasma display panel sustaining driver using single side sustaining technique with the dual resonant method is proposed. Since this circuit enables to reduce switches in energy recovery circuit with keeping voltage stress like that of prior circuit, it can be low cost circuit comparing with a conventional driver. To integrate sustain function into one side with single power source in the driver, a charge pump method is adopted to make negative sustaining voltage and achieve dual resonant energy recovery on sustaining modes.

• 한국진공학회:학술대회논문집
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• 한국진공학회 1997년도 제13회 학술발표회 논문개요집
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• pp.173-176
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• 1997

A numerical analysis of the micro-discharge in an AC pplasma dispplay cell has been made using time-deppendent, 2-dimensional multi-fluid equations to understand the discharge pphysics of He-Xe discharge. The time deppendent distribution of the electron tempperature, densities of electrons, various ions and excited sppecies, and the effects fo the wall charge accumulated on the dielectric surface are obtained and comppared with the results of direct observation of time deppendent behavior of VUV and visible sppectra from single discharge cell observed using a gated, image intensified CCD to elucidate the discharge physics.

• 한국세라믹학회:학술대회논문집
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• 한국세라믹학회 2000년도 춘계총회,특별강연,심포지움,연구발표회
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• pp.33.1-33.1
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• 2000

• 한국전기전자재료학회논문지
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• 제15권11호
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• pp.976-980
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• 2002

This paper repors on low temperature sealing process of PDP using binder and capping glass. The exhausting hole on rear glass of PDP was sealed by capping glass using screen-printed binder without exhausting glass tube. Based on the tubeless packaging process, out gassing problem could be reduced and vacuum conductance could be improved by eliminating exhaust tube.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 신호처리소사이어티 추계학술대회 논문집
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• pp.359-362
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• 2003

In PDP(Plasma Display Panel), sub-field method is used to implement gray scale. Each sub-field has different periods. And Every gray level has information of which sub-field has to be displayed. This is called sub-field mapping. There are several sub-field mapping values in some gray levels. So, it is possible to select best choice in this paper, we propose new sub field mapping method using a fuzzy inference system to select best sub-field mapping values in accordance with input image and environment temperature. In order to implement fuzzy system, we used MATLAB fuzzy inference editor.