• 한국광학회:학술대회논문집
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• 한국광학회 2002년도 하계학술발표회
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• pp.216-217
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• 2002

액정표시소자(Liquid Crystal Device)가 흑백의 문자표시소자로 개발된 이래로, 설계 기술 및 제조기술의 발전으로 그 응용분야도 현저히 확대퇴고 있다. 그 응용분야 가운데 노트북 컴퓨터, 휴대전화, IMT-2000, 전자책(e-book)등 최근 현저한 진보를 보이고 있는 정보통신기기들은 그 휴대성 때문에 좀더 가볍고, 얇으며, 소비전력이 적은 디스플레이 소자를 요구하고 있다. 이러한 조건을 만족시키기 위해 무겁고 전력소모가 많은 배면조명을 사용하지 않는 반사형 액정표시소자 연구가 활발하다. (중략)

• 한국조명전기설비학회지:조명전기설비
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• 제18권4호
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• pp.47-53
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• 2004

미국, 일본 및 유럽을 중심으로 오랫동안 검토가 진행되어 왔던 HDTV(High Definition TV)가 2005년을 본격적인 상용화의 원년으로 하여 각국에서 많은 활동이 이루어지고 있다. HDTV 보급에 있어서, 핵심적인 부문을 차지하고 있는 Display는 지난 백 여년간 그 명맥을 유지하여 오던 CRT(Cathode Ray Tube)가 Display의 Size 및 해상도면에서 그 한계를 드러냄에 따라 그 퇴조를 선언하고, 대체 Device의 출현을 기대하고 있다. 특히 기술 개발의 중심이 되고 있는 플라즈마 디스플레이(PDP, Plasma Display) 및 LCD(Liquid Crystal Display)는 평판 디스플레이로서의 장점으로 차별화 되어 그 발전가능성에 많은 관심을 받고 있으며, 그로 인한 약진이 두각을 나타내고 있다. (중략)

• 한국통신학회:학술대회논문집
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• 한국통신학회 1991년도 추계종합학술발표회논문집
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• pp.86-91
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• 1991

A capability of performing the optical logic and arithmetic operations is followed by an effective encoding technique. In this paper, we proposed the color light encoding technique. By using this encoding technique, the space bandwidth product(SBP) is minimized in the output plane. In addition, we proposed the pre-operation pro-carry processing method that performs faster than the same time operation and carry processing method in optical computing. We proposed that the color liquid crystal device(CLCD) is used as the encoded color light input source.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.2
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• pp.1054-1057
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• 2003

We have studied $90^{\circ}$ twisted nematic (TN) mode driven by fringe electric field, where two polarizers are parallel each other such that the cell shows a black state before a voltage is applied. According to the studies by computer simulation for a LC with negative dielectric anisotropy, the LC twists perpendicular to the horizontal field direction of fringe electric field and the degree of tilt angle is very low, when a voltage is applied. Therefore, the new device exhibits wide viewing angle characteristic due to in-plane switching and high transmittance since the LC director aligns parallel to the polarizer axis.

• E2M - 전기 전자와 첨단 소재
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• 제8권6호
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• pp.699-707
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• 1995

The material that is both conductive in electricity and transparent to the visible ray is called transparent conducting thin film. It has many fields of application such as Solar Cell, Liquid Crystal display, Vidicon on T.V, transparent electrical heater, selective optical filter, and a optical electric device , etc. In the recent papers on several TCO( transparent conducting oxide ) material, the study is mainly focusing on ITO(indium tin oxide) because ITO shows good results on both optical and electrical properties. Nowaday, in the development of LCD(Liquid Crystal display), the low temperature process to reduce the production cost and to deposit ITO on polymer substrate (or low melting substrate) has been demanded. In this study, we prepared indium tin oxide(ITO) by a cylindrical DC magnetron sputtering with Indium-tin (9:1) alloy target instead of indium-tin oxide target. The resistivity of the film deposited in oxygen partial pressure of 5% and substrate temperature of 140.deg. C. is 1.6*10$\^$-4/.ohm..cm with 85% optical transmission in viaible ray.

• 한국광학회지
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• 제16권2호
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• pp.113-120
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• 2005

LCD-BLU(liquid crystal device-back light unit)에 사용되는 도광판의 미세 산란패턴을 만드는 새로운 방법으로서, 실리콘 웨이퍼의 비등방 식각에 의해 자연적으로 형성되는 3차원 결정면 구조를 이용하는 방법을 제안하였다. 실리콘 3차원 결정면을 갖는 도광판과 프리즘 시트의 원판을 설계 및 제작하였고, casting 공정을 통해 PDMS 재질로 복제된 도광판을 제작하여 특성을 분석하였다. 측정 결과, 기존 인쇄형 도광판에 비해 실리콘피라미드 패턴의 도광판이 $10\%$ 증가된 정면 휘도 효율을 가질 수 있음을 실험적으로 검증하였다.

• 한국안전학회지
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• 제24권6호
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• pp.50-54
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• 2009

Ionizer is used for improving manufacturing process and reducing inferior goods in the clean room. As a general rule, neutralization of the electrostatic charge is most important to make TFT-LCD, PDP and OLED. Pulse AC-static eliminator with output voltage of about 10.5kV has been used these days as neutralization device. But this device has a problem with lower performance which was caused by particles-adhesion on the electrode when it has been used for a long time. So we studied to solve the problem with lower performance using high Frequency(72kHz) static eliminator which was produced by Piezo transformer device, and compared Pulse-AC type with Piezo-electronic device such as decay time and ion balance for 10 weeks periods. As a result of this study, we found that Piezo transformer device has been maintained normal condition for 10 weeks. Also, we made the rule by this study, normally Piezo transformer device has to clean the electrode during every 11th weeks.

• 한국광학회지
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• 제11권2호
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• pp.91-96
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• 2000

콜레스테릭 액정 플리머 박막을 이용한 새로운 개념의 광섬유 원편광 거울을 제작하고 그 특성을 분석하였다. 콜레스테릭 액정 거울의 광학적 특성을 보여주는 Jones Matrix를 유도하고 실험을 통하여 검증하였다. 제작된 광섬유 원편광 거울은 선형 광섬유 레이저 공진기에서 공간적 홀버닝을 제거하는데 사용 될 수 있으며, 광섬유 내에서의 비선형 편광 변화 효과를 이용한 모드록킹 동작을 얻을 수 있다. 실험을 통해 얻은 모드 록킹 된 레이저의 펄스 폭은 630fs로 측정 되었다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.632-632
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• 2013

We generated single-crystal organic nanowire arrays using a direct printing method (liquidbridge- mediated nanotransfer molding) that enables the simultaneous synthesis, alignment and patterning of nanowires from molecular ink solutions. Using this method, single-crystal organic nanowires can easily be synthesized by self-assembly and crystallization of organic molecules within the nanoscale channels of molds, and these nanowires can then be directly transferred to specific positions on substrates to generate nanowire arrays by a direct printing process. The position of the nanowires on complex structures is easy to adjust, because the mold is movable on the substrates before the polar liquid layer, which acts as an adhesive lubricant, is dried. Repeated application of the direct printing process can be used to produce organic nanowire-integrated electronics with twoor three-dimensional complex structures on large-area flexible substrates. This efficient manufacturing method is used to fabricate all-organic nanowire field-effect transistors that are integrated into device arrays and inverters on flexible plastic substrates.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2008년도 춘계학술대회 및 기술 세미나 논문집 디스플레이 광소자
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• pp.42-42
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• 2008

Considerable attention has been focused on the applications of flexible liquid crystal (LC)-based displays because of their many potential advantages, such as portability, durability, light weight, thin packaging, flexibility, and low power consumption. To develop flexible LCDs that are capable of delivering high-quality moving images, like conventional glass-substrate LCDs, the LC device structure must have a stable alignment layer of LC molecules, concurrently support uniform cell gaps, and tightly bind two flexible substrates under external tension. However, stable LC molecular alignment has not been achieved because of the layerless LC alignment, and consequently high-quality images cannot be guaranteed. To solve these critical problems, we have proposed a PDMS pixel-wall based bonding method via the IB irradiation was developed for fasten the two substrates together strongly and maintain uniform cell gaps. The effect of the IB irradiation on PDMS with PI surface was also evaluated by side structure configuration and a result of x-ray photoelectron spectroscopic analysis of PDMS interlayer as a function of binder with substrates. large number of PDMS pixel-walls are tightly fastened to the surface of each flexible substrate and could maintain a constant cell gap between the LC molecules without using any other epoxy or polymer. To enhance the electro-optical performance of the LC device, we applied an alignment method that creates pretilt angle on the PI surface via ion beam irradiation. Using this approach, our flexible LCDs have a contrast ratio of 132:1 and a response time of about 15 ms, resulting in highly reliable electro-optical performance in the bent state, comparable to that of glass-substrate LCDs.