• Transactions on Electrical and Electronic Materials
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• v.9 no.6
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• pp.251-254
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• 2008

Blue-white reflective cholesteric liquid crystal display was prepared by a unique method of single liquid crystal layer, the combination of yellow color liquid crystal and blue color backplane. The dopant and host combination of chlolesteric liquid crystal affects the color spectrum. The CIE chromaticity coordinates of blue and white are (0.10, 0.16) and (0.29, 0.30), respectively. The relatively low driving voltages of 32 V for blue-white display are obtained.

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.479-482
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• 2004

We report a method for simultaneous measurements of cell gap, twist angle, birefringence dispersion of liquid crystal (LC) material and alignment directions in filled reflective LC cells. The method is based on spectral measurements of the LC cell reflectivity for three orientations ($0^{\circ},45^{\circ},90^{\circ}$) of the exit polarizer and may be applied for LC cells with low and high gaps.

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.98-100
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• 2004

We report a novel manner for preparing single layer anti-reflective coatings with excellent optical properties (<1% reflection) over a broad wavelength regime. The technology is based upon the self-assembly and UV curing of reactive nano-particles, leading to nano-structured coatings with a gradient in refractive index. The single processing step leading to such coatings is fast, robust and cost effective. Furthermore in this paper we will address the mechanical durability of such nano-structured coatings.

• Journal of the Optical Society of Korea
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• v.11 no.4
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• pp.158-161
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• 2007

We proposed a novel linearization technique for a DFB LD in the RoF link. The proposed scheme is based on the cross gain modulation(XGM) effect of a reflective semiconductor optical amplifier(RSOA) with light injection. We experimentally demonstrated and evaluated the enhanced CIR performance using the proposed linearization scheme.

• Electronics and Telecommunications Trends
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• v.28 no.5
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• pp.1-10
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• 2013

전자종이(e-Paper)는 일반 종이와 같이 자체 광원이 필요 없는 반사형(reflective, not emissive) 표시소자이면서, 기존 LCD에 비해 시야각 및 해상도가 우수하며, 백라이트가 필요 없고, 어떤 기판 위에서도 구현이 가능하며, 공정이 간단하여 Roll-to-Roll 공정을 통하여 적은 비용으로 대량생산을 할 수 있다. 본 보고서에서는 상기의 여러 가지 특징들을 가지고 있는 개념을 수용하여 기술개발 단계를 설명하고자 한다. 이를 바탕으로 현재 실용화 정도가 가장 진척된 전기영동방식의 전자종이의 컬러화 진행 현황에 대하여 국내외적인 연구현황을 상술하고자 한다.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.981-984
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• 2005

Many flat panel displays displays rely on polymeric substrates with thin film coatings, such as anti-reflective, anti-static and hardcoats, to improve optical and mechanical properties of the display. In this paper we briefly discuss the principles underlying the mechanical robustness of such coated structures, and examine two fitness-for-use tests currently employed by the industry. We compare the teachings with some results obtained with our hardcoats and anti-reflective coatings.

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.215-218
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• 2003

We have developed a reflective 3.5" QVGA color TFT-LCD with high reflection within viewing angle. For this, We have introduced new pixel design and asymmetric reflector. Based on these technical concepts, we get a high aperture ratio of 93.5% and much higher reflection up to 64% with a 3.5" prototype panel.

• Korean Journal of Optics and Photonics
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• v.5 no.1
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• pp.31-36
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• 1994

We present a structure of a reflective Fabry-Perot etalon with nonlinear Kerr material (Kerr FP etalon), and report the polarization conversion and the optical bistability of polarization conversion. A device proposed has high polarization conversion ratio, 100% or so, and good/broad optical bistablity for input pump intensity.

• Journal of the Korean Home Economics Association
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• v.44 no.2 s.216
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• pp.13-23
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• 2006

The purpose of this study was to explore 6 preservice teachers's perceptions and practices on children and teaching while they implemented the Project Approach. Using qualitative research, data were collected from individual and group reflections, interviews, classroom observations, and videotaping. Results showed that preservice teachers recognized the importance of observing children in context and the meaning of learning through the Project Approach. Preservice teachers developed their identities through reflective thinking on their theories and practices.

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.153-156
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• 2002

We have developed a pixel structure for reflective color TFT-LCD which can display 27-color in still-image. The proposed pixel can display 3 gray scale in still image; white, black and median gray. This paper shows the concept and the driving method of the proposed pixel. Finally this paper compares power consumption and area with the Toshiba's DMOG technology.