• Korean Journal of Optics and Photonics
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• v.20 no.4
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• pp.241-248
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• 2009

We suggest a new method to determine the off-alignment error of the composite film, together with in-plane($R_{in}$) and out-of-plane retardation($R_{th}$) of the compensation film, simultaneously. The composite film consists of a polarizing film and a compensation film for improvement of viewing angle of a liquid crystal display. We regarded the compensation film as o-plate with its optic axis along an arbitrary direction. By using an extended Jones matrix method, the polarization characteristics of the composite film are examined. The calculated Fourier constants, ($\alpha$, $\beta$) curves of the composite film as the azimuth angle is varied at the incident angles of $0^{\circ}$ and $50^{\circ}$, respectively, are used to determine the axis misalignment, the tilt angle and the azimuth angle of the compensation film by adopting the linear regressional analysis technique. Since this method can be applied for the inspection of the composite film even after laminating the polarizing film and the compensation film, it will be useful for simplifying the manufacturing process and reducing the production cost of liquid crystal display panels.

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.379-382
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• 2004

Microoptics has become the key technology in liquid crystal display systems due to its capabilities of miniaturization and design flexibility. We successfully demonstrate five different microoptical components for enhancing the image quality, providing better functions, increasing light efficiency, and generating 3D images in LCD applications.

• 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.

• Polymer Science and Technology
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• v.15 no.3
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• pp.296-302
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• 2004

최근 분자들의 자기조립 현상을 나노-바이오 소자 개발에 응용하는 연구가 활발히 진행되고 있으며, 이러한 응용을 위한 대표적인 자기조립체로는 양친성 계면활성제, 블록공증합체, 콜로이드와 초분자체를 들 수 있다. 대부분의 콜로이드가 구형 모양으로 vander Waals interaction에 의하여 3-D결정 (crystal) 형태의 자기조립구조를 형성하는 반면에, 콜로이드를 제외한 대부분의 자기조립체는 적정 조건에서 액정 (liquid crystals), 결정 (crystal) 및 무정형 (amorphous)을 형성한다. 적용하고자 하는 응용의 범위와 재료의 특성에 따라서 각 상태 (phase)를 이용할 수 있으나, 액정상을 이용하는 것과 결정상을 이용하는 경우가 대부분이다. (중략)

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.513-514
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• 2008

The potential of non-rubbing technology for applying to display devices was demonstrated by irradiating a high density argon ion beam (IB) on a polyimide (PI) as a liquid crystal alignment layer. The superior electro-optical characteristics were obtained, compared to rubbed PI, Although the low pretilt angle was created on the IB irradiated PI.

• Journal of Advanced Marine Engineering and Technology
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• v.28 no.3
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• pp.509-515
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• 2004

The PIV(Particle Image Velocimetry) with liquid crystal tracers is used for visualizing and analysis of the mixed convection in the parallel plates with the upper part cooled and the lower part heated. It is found that the flow pattern of mixed convection in the parallel plates can be classified into three patterns which was affected by Reynolds number. Also, the periodic nature is confirmed, and visualized in experiment.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07a
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• pp.97-100
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• 2005

The recent Bistable Nematic ($BiNem{(R)}$) LCD technology presents long term bistability, high level passive matrix multiplexing and high optical quality. The BiNem device, based on anchoring breaking, needs specific low anchoring strength materials - alignment layers and liquid crystal mixtures. We present here our approach to develop nematic mixtures with wide enough temperature range and low zenithal anchoring energy.

• Electrical & Electronic Materials
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• v.9 no.7
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• pp.745-754
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• 1996

이글에서는 다음의 내용을 다루었다. 1. LCD의 기능 성능 향상, (1) CRT와 TFT-LCD의 기능, 성능 비교, (2) TFT-LCD의 기능, 성능향상을 위한 과제 2. TFT-LCD의 가격 및 수급현황 3. Poly-Si TFT-LCD전망 4. 투사형 TFT-LCD 5. 반사형 LCD 6. 필림형 LCD 7. 고분자 분산형 액정(PDLC)

• Electrical & Electronic Materials
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• v.10 no.1
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• pp.68-75
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• 1997

본 해설에서는 평판 디스플레이 소자중의 하나인 LCD의 액정배향기술에 관하여 해설하였다. 액정배향은 LCD의 전기광학특성을 좌우하는 매우 중요한 기술이다. LCD 소자에 있어서 기판의 표면 위에 액정분자를 배열시키는 기술은 현재 러빙법이 주로 사용되고 있지만 러빙을 하지 않는 넌러빙법을 이용한 액정배향기술이 강하게 요구되고 있으며 향후 LCD에 있어서 보다 중요한 역할을 할 것으로 기대되고 있으며 고성능 LCD의 실현에는 필수 불가결한 기술로 생각된다.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.4 no.2
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• pp.131-133
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• 1994

Deposition of silicon on pretreated sapphire substrates has been investigated by the liquid phase epitaxy method at low temperatures. An average 14 $\mu\textrm{m}$ thickness of silicon was grown over a large area on sapphire substrate originally coated with a much thinner silicon layer $[0.5 \mu\textrm{m} (100) Si/(1102) sapphire]$ at low temperatures from $(380^{\circ}C to 460^{\circ}C)$.