• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.184-188
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• 2009

To interactively share High Definition (HD)-quality visualization over emerging ultra-high-speed network infrastructure, several lossless and low-delay real-time media (i.e., uncompressed HD video and audio) transport systems are being designed and prototyped. However, most of them still rely on expensive hardware components. As an effort to reduce the building cost of system, in this paper, we propose the integration of both transmitter and receiver machines into a single bi-directional transport system. After detailed bottleneck analysis and subsequent refinements of embedded software components, the proposed integration can provide Real-time Transport Protocol (RTP)-based bi-directional transport of uncompressed HD video and audio from a single machine. We also explain how to interface the Gbps-bandwidth display output of uncompressed HD media system to the networked tiled display of 10240 $\times$ 3200 super-high-resolution. Finally, to verify the feasibility of proposed integration, several prototype systems are built and evaluated by operating them in several different experiment scenarios.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.46-49
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• 2002

Recent trends of low-temperature polycrystalline Si (LTPS) TFT technologies are presented. Characteristics of LTPS TFT processes are compared with those of a-Si TFT's. In order to compete with well-established a-Si TFT-LCD technology, LTPS process has to be as simple as possible. One of the most critical processes, recrystallization of a-Si thin films, could be the process for the differentiation of LTPS technology. Along with these technical reviews, a recent development of the 5.0-inch LTPS TFT-LCD is presented. In order to achieve high-performance display characteristics and save the power consumption, the transflective mode is adopted. The 5.0-inch display with 186 pixel-per-inch, high-resolution LCD was measured to be 10% for the reflectance and 70:1 for the contrast ratio. This display is designed for a high information content hand-held PC (HHPC) application.

• 방송공학회논문지
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• 제22권1호
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• pp.42-50
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• 2017

비트의 심도 확장은 영상을 표현하는 비트 수를 확장하는 방법이다. HDR(High Dynamic Range) 디스플레이의 발전과 디스플레이의 해상도가 높아짐에 따라서, 디스플레이에서 영상을 표현하는 휘도가 증가하고 표현력도 상승한다. 이러한 디스플레이에 대응하기 위해서는 영상을 표현하는 비트수도 확장되어야 하기 때문에 비트의 심도 확장의 중요성은 높아지고 있다. 본 논문에서는, 높은 비트 심도(10bit)를 가지는 디스플레이에 기존의 영상(8bit)을 자연스럽게 표현하기 위한 비트 심도 확장 방법을 소개한다. 정량적인 결과와 정성적인 결과 및 연산량의 비교를 통해서 제안된 알고리즘이 기존의 비트 심도 확장 방법과 비교해서 우수함을 검증하였다. 제안된 방법은 기존의 최신 비트 심도 확장 방법과 비교해서, 40배 더 빠른 연산속도와 평균 1db이상 높은 성능 향상 결과를 보여준다.

• 한국정보통신학회논문지
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• 제15권7호
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• pp.1415-1422
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• 2011

본 논문에서는 풀 칼라 전광판에서 고효율의 해상도 표출을 위해서 듀얼 스캐닝 제어방식을 제안하고, 이를 이용해서 LED전광판의 고정된 픽셀을 영상신호에 따라 픽셀 도트 형태를 변화하게 하였다. 그리고 DICT(Dynamic Image Correction Technology) 메인 컨트롤러를 이용해서 동영상 정보를 히스토그램 균등화에 의거 영상 계조도의 값을 균일하게 분포하도록 하고, 동적 영역을 변환하여 화질을 개선하며, 입력 영상을 듀얼 오토 스캔 스위칭 컨트롤러로 전광판 내 LED Module의 픽셀을 물리적으로 제어함으로서 기존 전광판 LED 픽셀 도트의 표출 대비 4배의 고해상도 표출이 가능하도록 하는 기술을 제안하고 이를 시험제작을 통해서 그 성능을 입증하였다.

• Journal of Information Display
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• 제7권3호
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• pp.1-4
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• 2006

2.22-inch qVGA $(240{\times}320)$ amorphous silicon thin film transistor liquid active matrix crystal display (a-Si TFT-AMLCD) panel has been successfully demonstrated employing a 2.5 um fine-patterning technology by a wet etch process. Higher resolution 2.22-inch qVGA LCD panel with an aperture ratio of 58% can be fabricated as the 2.5 um fine pattern formation technique is integrated with high thermal photo-resist (PR) development. In addition, a novel concept of unique a-Si TFT process architecture, which is advantageous in terms of reliability, was proposed in the fabrication of 2.22-inch qVGA LCD panel. Overall results show that the 2.5 um fine-patterning is a considerably significant technology to obtain higher aperture ratio for higher resolution a-Si TFT-LCD panel realization.

• 반도체디스플레이기술학회지
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• 제14권3호
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• pp.1-5
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• 2015

In photolithography process, resolution enhancement techniques such as optical proximity correction (OPC) and phase shift mask (PSM) have been applied to improve resolution. Especially, sub-resolution assist feature (SRAF) is one of the most important OPC to enhance image quality including depth of focus (DOF). However, imaging performance of the mask could be varied with the diffraction order amplitude changed by inserting SRAF. Therefore, in this study, we investigated the imaging properties and process margin of attenuated PSM with SRAF. Reflectivities of attenuated PSMs at 13.5 nm were 3, 6, 9% and simulation was performed by $PROLITH^{TM}$. As a result, aerial image properties and DOF as well as diffraction efficiency were improved by increasing the reflectivity of attenuated PSM. Additionally, printed critical dimension variations depending on SRAF width and space error were also reduced for attenuated PSM with high reflectivity. However, SRAF could be printed when reflectivity of attenuated PSM is high enough. In conclusion, optimization of reflectivity of attenuated PSM and SRAF to prevent side-lobe from being printed is needed to be considered.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.21-25
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• 2005

In order to implement high pixel density in AMLCDs, high aperture ratio is a very important design factor. We have implemented VGA panels with IPS and TN modes. IPS mode is a very attractive solution to meet the requirement for mobile phone displays. It provides much higher aperture ratio as well as wider viewing angle at extremely high pixel density over 400 ppi.

• International Journal of Contents
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• 제14권3호
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• pp.1-6
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• 2018

For 3D display applications, auto-stereoscopic display methods that can provide 3D images without glasses have been actively developed. This paper is concerned with developing a display system for elemental images of real space using integral imaging. Unlike the conventional method, which reduces a color image to the level as much as a generated depth image does, we have minimized original color image data loss by generating an enlarged depth image with interpolation methods. Our method was efficiently implemented by applying a GPU parallel processing technique with OpenCL to rapidly generate a large amount of elemental image data. We also obtained experimental results for displaying higher quality integral imaging rather than one generated by previous methods.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1225-1228
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• 2005

Barrier ribs in the plasma display panel(PDP) function to maintain the discharge space between the glass plates as well as to prevent optical crosstalk. Patterning of barrier ribs is one of unique processes for making PDP. In this work photosensitive barrier rib pastes were prepared by incorporating binder polymer, solvent, functional monomers photoinitiator, and barrier rib powder of which surface was treated with fumed silica particles. Study on the function of materials for the barrier rib paste were undertaken. After optimization of paste formulation and photolithographic process, it was found that photolithographic patterning of barrier ribs with photosensitive barrier rib green sheet could be used in the fabrication of high resolution PDP.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.814-817
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• 2007

We present a hybrid hardware architecture capable of encoding and decoding a full HD resolution video with 60 fps. A number of technical modifications are applied to an existing image compression algorithm not only to accommodate large videos at a high frame rate but to enhance the quality of synthetic images, such as characters and video game images. Image quality of the proposed algorithm at a 1/6 compression ratio was comparable to that of the BTC based 1/3 compression algorithm.