• Journal of Information Display
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• 제2권3호
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• pp.32-38
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• 2001

The most important parameter for TV application of LCD is a fast switching time for the display of moving image. To achieve faster switching time, the novel LC single materials with large dielectric anisotropies ($16{\sim}20$), high clearing temperatures ($195.5{\sim}237.4^{\circ}C$), broad nematic ranges (up to 169.9 $^{\circ}C$) and high birefringence ($0.254{\sim}0.2200$) were developed. KUR-series LC mixtures blended these single materials having significantly higher clearing temperatures and dielectric anisotropy values compared with conventional LC mixture. Especially, their clearing temperatures are $10{\sim}30^{\circ}C$ higher than their host mixture. These LC mixtures showing about lOms of high-speed switching time in Tv/Monitor of TFT LCD, is short enough to be addressed in a single time frame of 60Hz (16.7 ms). The threshold voltage $V_{th}$ was low enough to operate at a driving voltage of 5 V. The VHR values were found to be high enough for TFT-LCD in wide temperature range. Our novel LC mixtures are suitable materials for the inclusion in to LC mixtures for TV application of TN-LCD

• 한국전자파학회논문지
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• 제27권9호
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• pp.844-853
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• 2016

컴퓨터의 대표적인 출력 매체인 LCD(Liquid Crystal Display) 모니터에서는 일반적으로 의도치 않은 전자파가 누설된다. 이러한 누설 전자파에는 컴퓨터의 메인 보드에서 LCD 모니터로 전달되는 화면 정보가 포함되어 있기 때문에 누설 신호의 복원을 통한 화면 정보 누설의 위험성이 존재한다. 따라서 누설 신호를 통한 전자파 보안 위협이 이슈가 되고 있으므로 정보 누설 가능성에 대한 분석이 필요한 상황이다. 본 논문에서는 데스크탑과 랩탑 모니터에서 누설되는 전자파를 분석하여 화면 정보 누설의 가능성을 확인하였다. 화면 구성 매커니즘을 분석하여 LCD 모니터의 누설 전자파의 형태를 예측하였고, 누설 신호 탐지 실험 환경을 구성하여 원거리에서 누설 전자파를 측정하였다. 또한, 여러 알고리즘을 사용하여 누설 화면을 복원하고, 원 화면과 비교하여 정보 누설 위협에 대하여 확인하였다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.381-384
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• 2005

Driver IC is one of the key components on the LCD monitor and LCD/TV. The function of the driver IC is to transfer and forward the input signals to LCD panel module. Inside driver IC, there are several operating units which process the input signals and generate the appropriate size and resolution to the LCD panel module. LCD panel module will display these input signals. However, there are some difficulties which driver IC designer, LCD monitor and LCD/TV maker will face. Thus, this article addresses the function and difficulties on driver IC.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1067-1070
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• 2005

A large size flat panel LCD-TV must fulfill different requirements than a desktop LCD-monitor: The contrast must be much larger, the viewing angle should be as wide as possible and the switching times must be shorter to allow moving pictures to be displayed naturally. The "Vertically Aligned" technology is most promising to realize such a product. LC-material development for this technology began at Merck about 10 years ago. New materials based on the 1,1,6,7-tetrafluoroindane skeleton were recently synthesized via ortho-metallation and intramolecular Heck cyclization followed by an oxidative fluorination procedure. The materials offer improved properties over liquid crystals currently employed in flat panel LCD-TVs.

• 한국산학기술학회논문지
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• 제15권6호
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• pp.3429-3434
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• 2014

TFT-LCD 패널 제조 산업에서 삼성전자는 후발기업으로써 선발기업인 일본의 샤프를 추월하여 선도하고 있다. 트리즈 시스템 분석을 활용하여 디스플레이 산업은 노트, 모니터, TV & 모바일 제품 시장으로 변화를 하였으며 시장(고객)의 요구속성도 변화를 함을 제시하였다. 또한 삼성의 TFT-LCD 기술 중 빠른 응답 기술 혁신 사례를 제시하였다. 예를 들면, 응답속도 개선을 위해 기존 사용하고 있는 액정 혼합물에 트리즈의 모순성, 물질-장 방법 등을 활용하여 개발된 고복굴절률 액정물질을 첨가하여 광시야 각, 빠른응답 특성을 갖는 신규 액정 혼합물을 개발하였다. 새로운 액정혼합물의 응답속도는 60%정도로 단축 개선되었다(기존 액정 사용 시 16 ms, 새로운 액정혼합물 사용 시 10ms).

• 한국광학회지
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• 제16권1호
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• pp.63-70
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• 2005

컬러 LCD(liquid crystal display) 모니터의 광학적 상에 대한 성능을 평가하기 위하여 LCD 모니터를 포함한 모든 광학계의 파장별 공간주파수 반응에 가중치를 부여한 진폭전달함수(modulation transfer function ; MTF)를 이용한 다색광전달함수(polychromatic modulation transfer function ; PMTF)를 제안한다. 서로 다른 진폭들을 갖는 적색(R), 녹색(G), 청색(B)의 3개의 막대형 LCD 단위물체를 이용한 컬러 LCD의 PMTF의 시뮬레이션 결과와 실험적 결과가 잘 일치하며, 이 결과 컬러 LCD의 결상성능은 단색으로 측정하는 MTF 및 가시광의 전파장대를 사용하는 백색광 MTF와는 다른 R, G, B의 3색에 대한 PMTF로 측정하늘 것이 보다 적절하다.

• 소성∙가공
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• 제14권4호
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• pp.360-367
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• 2005

The injection-molded plastic parts have many surface defects: warpage, weldline, flowmark, zetting, scratching, shading and so on. As weldline was one of the major surface defects in the case of desktop monitor, warpage and surface shrinkage are the bigger problems of LCD monitor in the pursuit of light weight and thinner thickness of parts. Some measures to improve these defects were introduced in this paper. Based on these, the laboratory work to find out the optimum processing conditions and to get the best parts was repeated injection moulding try-out after reflecting these improvements. The defects of warpage and surface shrinkage was significantly improved after the improvements in the case of the 20.1 inch even if in the 15 and 17inch case the warpage size was a lttle over the allowed specification because of not taking the measure for parts design within the allowable limits from the required specification in the cause of cost down.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.408-411
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• 2004

Color filter is a fundamental and necessary component to make a full-color TFT-LCD, its quality intensively influence the performance of TFT-LCD in the application of Notebook Computer, Monitor and Television. Color filter in chromaticity also make an effect for human visual system and video enjoyment. Recently, mother glass size is enlarged for demand of large-size panels and new generation color .filter technology for large-size liquid crystal cell panels is also developed. Here, latest generation color filter technology in TFT-LCD will be discussed.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2004년도 추계학술대회논문집
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• pp.48-53
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• 2004

Injection molded plastic parts have many surface defcts: Warpage, wedline, flowmark, zetting, scratching, shading and so on. In the desktop mnitor's case, Weld line have been one of the main surface defects. Nowadays in the pursuit of light weight of parts, one of the big problems of LCD Monitor thinks Warpage and surface shrinkage. In this paper, we introduce some instances for prevevting these defestcs in the side of mould drawing, parts drawing and processing condition. Based on these, we tried to find out the optimum processing conditions through repeatedly tried injection moulding after reflecting these instances.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2000년도 제1회 학술대회 논문집
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• pp.11-12
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• 2000

An 18.1" Thin Film Transistor Liquid Crystal Display (TFT LCD) monitor adopting high brightness In Plane Switching (IPS) technology was realized. While conventional IPS structure used a Chromium (Cr) and Molybdenum (Mo) for a drain electrode, Indium Tin Oxide (ITO) was proposed and verified in this paper. Black sticky micropeal spacers were introduced for the reduction of light scattering phenomena, which was observed at dark room with the conventional micropeal spacers. With the proposed method, more than 10 % aperture ratio was increased and the excellent image quality was obtained.