• 한국전기전자재료학회논문지
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• 제27권5호
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• pp.303-306
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• 2014

In this paper, by using a dual frequency liquid crystal material, we propose a liquid crystal device with a fast response characteristics. The dual frequency liquid crystal material has a positive dielectric anisotropy value at a low frequency. With a high frequency, the dielectric anisotropy becomes negative. Therefore, the relaxation process is governed by not only the elastic deformation, but also the dielectric interaction. The measured decay time and rise time were 0.88 ms and 0.33 ms, respectively.

• Bulletin of the Korean Chemical Society
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• 제18권10호
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• pp.1067-1070
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• 1997

The synthesis and characterization of the nitrile ligands 3,4,5-tridodecyloxy benzonitrile (7) and 3,4,5-trioctadecyloxy benzonitrile (8), and their corresponding palladium(Ⅱ) complexes are described. The nitrile ligands display only a crystalline phase and do not show liquid crystalline behavior, while their corresponding palladium(Ⅱ) complexes dispaly an enantiotropic columnar mesophase. The induction of the columnar mesophase is mainly due to dimerization through the palladium complexation of the half disk-like nitrile ligands giving rise to a trans square planar geometry.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.895-898
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• 2004

We propose configurations for a transflective in-plane switching (IPS) cell using muti-domain structures. Usually, the cell configurations for a transflective liquid crystal(LC) cell have a complicated structure, because retardation change of transmissive part and reflective part are not same. The transflective LC cell should have two configurations for each part, such as a multi-cell gap structure. With the ion-beam alignment and the horizontal switching LC cell, a simple structure for a transflective LC cell is proposed. The configuration only adopts one cell gap structure, which may help the enhancement of a yield. Their original optical properties in conventional transmissive and reflective type IPS liquid crystal dispaly(LCD) are kept, it shows the wide-viewing angle and the good wavelength dispersion characteristics.

• Communications for Statistical Applications and Methods
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• 제8권2호
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• pp.557-564
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• 2001

The objective of he study is to record the real conditions along with the soccer ball that is, each player's ball keeping time, the number football keeping, accuracy of passing to other player, direction, etc., on a real-time basis, measure them in numbers and get necessary analyzed output as much as one needs. The study consists of the following stages: (1) Record the data by drawing through Visual Interface on a real-time basis; (2) Graphic windows to display the recorded data item by item in graphic; (3) Form windows to display the individual or team scores anytime when needed; (4) Windows to display the analyzed data in visualized form. The effect of the study is threefold: (1) It inputs all the game-related data on a real-time basis, which was impossible before and shows analyzed contents during the game enabling each tea manager o use; (2) In cse of TV broadcasting or newspaper articles, it explains objectively the situations of he game to the TV viewers or readers; (3) After the game, it provides importance information on each team's playing ability and individual player's technical improvement through data analysis.

• 대한전자공학회논문지
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• 제11권1호
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• pp.23-33
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• 1974

이 논문은 종래의 자자 Display에서 문자의 종류가 많으면, 입력부분이 방대해지고, character generator가 극히 복잡해지는 두가지 문제점을 동시에 해결을 주는 새로운 방식을 제안하였다. 이 방식은 동일한 기량요소가 조합되는 이자에 따라 크기와 위치문희이 자동적으로 가변되어 조합되어 나오는 것으로서, 입력기본요소의 특징 code의 추출로써 조합되는 문우의 form을 예측하고, 그들 form 특징으로써, 기본요소를 control한다. 그 결과, 24기본요소로서 14,364우가 발생되며, 장치가 극히 간단하고, 조합문자의 품질이 양호하다. 이 장처는 종래의 방법으로 했을때와 비교하면 장치가 약 500분 지 1로 적어진다.

• Journal of Ceramic Processing Research
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• 제13권spc2호
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• pp.189-192
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• 2012

Manufacturing process for silicate glass phosphors containing Eu2+ activator and their photoluminescence property have been studied. We adopted powder sintering process instead of traditional glass melting process for making glass phosphor. At first, phosphor powders were synthesized at 1200 ℃ for 2-3 hours under a reducing atmosphere with 10% H2-90% N2 gas mixture. The reduced powders were compacted into discs and then the discs weresintered at 1400 ~ 1500 ℃ for 1 hr under a reducing atmosphere of 5H2-95% N2. The enhancement of PL intensity by Al2O3 addition, XPS binding energy shift of Si 2p and O 1s, sintering shrinkage, and crystallization were characterized.

• 한국실내디자인학회논문집
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• 제13권2호
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• pp.150-158
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• 2004

Customers demands seeking the variety and individualization in the rapidly changed consumption environment with these changes in the distribution market expect the environment in the shops providing the degage and abundant lives and environmental change in the environment of sale providing abundant values in the life other than simple sale of goods. More effective marketing strategies are desperately required for corresponding to these customers demands. VMD is the consolidated visual plans for the emotional communication with customers through CI which is the visual element influencing customers visual environment, SI, interior and exterior designs, presentation of goods, advertising and marketing. This is the marketing strategy providing customers with joyful shopping space and enabling customers to get the information and characteristics of goods more effectively by means of visual elements in the comfortable environment of the shop and the main factor allowing the competitiveness differentiated from the competing companies. To achieve these goals, we herewith suggest the effective VMD Strategy and alterative by applying VMD as the consolidated marketing communication to the Lady's casual shop in the Hyundai department located in Gwangju after complementing problems found In the course of studying and analyzing the VMD Cases.

• 한국진공학회지
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• 제8권4B호
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• pp.565-571
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• 1999

In this study, high-density plasma etching characteristics of ITO(indium tin oxide) films used for transparent electrode in dispaly devices were investigated. Plasma diagnostic and surface analysis tools were used to understand etch reaction mechanism. The etch rate of ITO was increased by the increase of reactive radicals such as H and $CH_3$ with the addition of moderate amount of $CH_4$ to Ar. However, the addition of excess amount of $CH_4$ decreased possibly due to the increased polymer formation on the ITO surface being etched. The increase of source power and bias boltage increased ITO etch rates but it decreased selectivities over under-layers $(SiO_2, Si_3N_4)$. The increase of working pressure up to 20mTorr also increased ITO etch rates, however the further increased of the pressure decreased ITO etch rates. From the analysis of XPS, a peak related to the polymer of hydrocarbon was observed on the etched ITO surface especially for high $CH_4$ conditions and it appears to affect ITO etch rates.

• 대한전자공학회논문지SD
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• 제46권7호
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• pp.68-73
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• 2009

본 논문에서는 CMOS 회로를 이용하여 디스플레이포트(DisplayPort)에 사용 가능한 스프레드 스펙트럼 클록 발생기(SSCG)를 제안하고 구현하였다. 스프레드 스펙트럼 클록 발생기를 1-1 MASH 시그마-델타 변조기(Sigma-delta modular)를 이용한 분수형 분주기를 사용하여 분주비를 변화시켜 확산시키는 구조를 사용하였다. MASH 1-1 시그마-델타 변조기를 사용하게 되면 회로구성이 용이해지고 면적일 줄일 수 있는 장점이 있다. 시그마 델타 변조기를 이용한 스프레드스펙트럼 생성기의 장점은 확산비율과 변조율을 시그마 델타 변조기의 입력 값을 변조하여 정확하게 조절할 수 있다는 것이다. 확산비율과 변조율은 디스플레이포트 표준 스펙에 만족되도록 설계하였고, 디스플레이포트 링크심볼클록인 270MHz/162MHz 듀얼 모드 클록에서도 만족하도록 설계하였다. 그리고 변조파형은 33KHz의 삼각파의 형태를 취하고 있고, 0.25%의 다운스프레드 스펙트럼 클록이 발생한다. 스프레드 스펙트럼 클록 발생기의 세부 설계블록들은 모두 풀커스텀 방식으로 설계하였다. 또한 0.18$\mu$m 1P-6M CMOS 공정을 사용하여 설계 및 제작되었으며, 레이아웃 된 전체 블록의 면적은 0.620mm $\times$ 0.780mm이었다. 칩 측정결과 디스플레이포트 동작기준을 잘 만족함을 보였다.

• 한국산학기술학회논문지
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• 제6권1호
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• pp.78-82
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• 2005

디스플레이 세정의 개념은 기존의 반도체 세정인 RCA 세정을 근간으로 하고 있으며, 대면적화와 환경친화적인 관점으로 발전하여 왔다. 본 연구에서는 프베이 도표에 근거하여 전리수를 이용하여 입자를 제거할 수 있음을 예측하고 이를 확인하였다. 이 때 연구 대상으로 MgO 분말을 사용하였다. 사용된 전리수는 산화전위가 800 mV 이상이고 pH가 3.1으로 산화상이 강하였다 전리수에 용해되는 MgO 분말의 무게를 pH에 조사하였으며, 250 ml 전리수에 100-500 microgram 범위로 용해됨을 알 수 있었다. 이는 $1E18 ea/cm^3$정도의 용해 물질을 내포하고 있음을 의미하며, 따라서 $1E15 ea/cm^3$ 정도 수준의 불순물을 다루는 디스플레이 세정에 적용할 수 있음을 알 수 있었다. 특기할 것은 전리수는 반도체의 기판인 실리콘 웨이퍼의 자연산화막을 식각하여 표면거칠기를 증가시킴을 처음으로 관찰하였다.