• 전기전자학회논문지
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• 제17권2호
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• pp.151-158
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• 2013

There are several kind of surface deformation display methods using the fuzzy model. In this paper, we describe three fuzzy display methods for a surface deformation and perform a comparative analysis between the modified fuzzy display method and some conventional fuzzy display methods. In each method, the analysis will be performed through computer simulation in order to show the performance of each algorithm. The results show that the modified method have improved the realism and can be used better than the conventional methods in practical applications.

• Journal of Information Display
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• 제10권3호
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• pp.101-106
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• 2009

In this study, a physical OLED analog behavior model for SPICE simulation was described using the Verilog-A language. The model was presented through theoretical equations for the J-V characteristics of OLED derived according to the internalcarrier emission equation based on a diffusion model at the Schottky barrier contact, and the mobility equation based on the Pool-Frenkel model. The accuracy of this model was examined by comparing it with the results of the device simulation that was conducted.

• 대한산업공학회지
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• 제40권3호
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• pp.283-290
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• 2014

In the flat panel display industry, to meet production target quantities and the deadline of production, the scheduler and dispatching systems are major production management systems which control the order of facility production and the distribution of WIP (Work In Process). Especially the delivery time is a key factor of the dispatching system for the time when a lot can be supplied to the facility. In this paper, we use survival analysis methods to identify main factors of the delivery time and to build the delivery time forecasting model. To select important explanatory variables, the cox proportional hazard model is used to. To make a prediction model, the accelerated failure time (AFT) model was used. Performance comparisons were conducted with two other models, which are the technical statistics model based on transfer history and the linear regression model using same explanatory variables with AFT model. As a result, the mean square error (MSE) criteria, the AFT model decreased by 33.8% compared to the statistics prediction model, decreased by 5.3% compared to the linear regression model. This survival analysis approach is applicable to implementing the delivery time estimator in display manufacturing. And it can contribute to improve the productivity and reliability of production management system.

• Journal of Information Display
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• 제9권3호
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• pp.33-38
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• 2008

A simple ray tracing model is developed to establish the relationship between the distributions of observed visible light and the excited Xe species in a PDP cell. The ray tracing model can obtain the density distribution of the excited Xe species. It shows the two independent discharge modes created during a single period of sustaining discharge. The maximum density of excited Xe species is located about $148{\mu}m$ away from the center of the gap between two sustaining electrodes. We also found the loss rate of VUV photons by comparing the luminance profile predicted in our theoretical model from experimental results. According to calculations based on our model, only about 22 percent of the photons can impinge the phosphor layer.

• 전기학회논문지
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• 제63권4호
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• pp.565-569
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• 2014

Recently, various kinds of new computer controlled devices have been introduced in a wide range of areas, and convenient user interfaces for controlling the devices are strongly needed. To implement natural user interfaces(NUIs) on top of the devices, new technologies like a touch screen, Wii Remote, wearable interfaces, and Microsoft Kinect were presented. This paper presents a natural and intuitive gesture-based model for controlling contents of LCD display. Microsoft Kinect sensor and its SDK are used to recognize human gestures, and the gestures are interpreted into corresponding commands to be executed. A command dispatch model is also proposed in order to handle the commands more naturally. I expect the proposed interface can be used in various fields, including display contents control.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1996년도 창립기념 전력전자학술발표회 논문집
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• pp.113-116
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• 1996

A model of a photovoltaic array written in PSPICE is presented in this paper. PSPICE is used to display array characteristics (I-V, P-V curve) as a function of parameters such as insulation and temperature. This paper is display in detail through a example of SM-50 model.

• Journal of Information Display
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• 제11권1호
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• pp.17-20
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• 2010

With the increasing demand for a better FPD image quality, better evaluation metrics and advanced display quality measurement methods are required to meet these needs. There are many measurement methods for evaluating the viewing angle of various display devices, but these methods, which include luminance drop, color shift, and contrast ratio decrease, are imperfect considering that human perception does not completely correlate to them. In this paper, a new method of measuring the perceptual angle of FPDs is proposed, considering human visual perception, which uses the color space of the color appearance model.

• 한국콘텐츠학회논문지
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• 제12권11호
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• pp.295-302
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• 2012

디스플레이 산업은 전체 한국 경제에서 매우 중요한 역할을 하고 있다. 디스플레이 기업의 보다 효율적인 운영과 보다 경쟁력 강화를 위한 경영 효율성의 분석이 필요함에도 불구하고, 디스플레이 기업의 효율성을 분석한 경험적 연구는 수행되지 않았다. 본 연구의 목적은 ANP와 DEA 모델을 이용한 상장 디스플레이 기업의 효율성 측정하고 분석하는 것이다. 본 연구에서는 2010년말 KOSPI에 상장된 7개와 KOSDAQ에 상장된 37개로 구성된 44개의 상장 디스플레이 기업을 대상으로 하이브리드 ANP와 DEA 모델을 이용하여 기업의 효율성을 분석하였다. DEA에서 가장 중요한 투입요소와 산출요소를 결정하기 위하여 ANP 모델을 적용하여 투입요소와 산출요소의 중요도를 평가하였다. 그리고 비효율성을 갖는 그룹으로 분류된 기업들에 대해서는 효율성을 갖는 벤치마킹 기업들과 이들 그룹으로 이동하기 위하여 개선해야 할 효율성 수치를 제공하였다.

• 한국전기전자재료학회논문지
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• 제13권12호
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• pp.1039-1044
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• 2000

Breakdown voltage model and expertiments are compared for discharge cells of AC plasma display panel. In the model, discharge paths are assumed to be initial electric field lines and the one-dimensional continuity equation is applied to the charged particle transport at each field line. The comparisons are performed in the wide range of gas pressure (50-600torr), Xe partial pressure over total pressure (1-6%), sustain electrode gap(100-1000$\mu\textrm{m}$), wall height(130, 300$\mu\textrm{m}$), and voltage pulse width(2-6${\mu}$s). The presented breakdown voltage model well agree with experiments in the above wide range. The increase of breakdown voltage with the decrease of the width(L) of protruding electrode is also described by the model.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2009년도 학술대회
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• pp.1069-1074
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• 2009

공공디스플레이는 상호작용이 없는 일 방향적인 개념에서 탈피하여 다양한 미디어의 전환이 일어나는 매체로 변해가고 있다. 쌍방향적인 공공디스플레이를 보는 관점 또한 여러 가지인데, 크게 HCI적인 측면에서 인간과 디지털 디스플레이의 상호작용이라는 시각에서 바라볼 수 있다. 특히 넓은 의미로서의 HCI로 공공디스플레이에서 인간과 디지털 기술에 기반한 아트의 상호작용을 인식하고 주목할 필요성이 있다. 이러한 시각에서 본 연구는 공공디스플레이에서 더욱 풍부한 미디어 경험을 제공하고자, 보는 거리에 따라 다른 상호작용, 그리고 보는 주체의 방향에 따라 다른 상호작용을 위한 인터랙션 모델을 제안한다. 또한 이러한 인터랙션 모델이 미디어 아트에 적용되는 사례를 실험 작품 제작을 통해 테스트하고자 한다. 특히 본 연구에서는 향상된 인터랙션 모델 제안을 위해 HCI 분야에서 두 가지 방법론을 도입하였다. 먼저 상황 분석적 접근(Context Analytic Approach)으로 공공디스플레이에서 거리에 의존한(Distance-dependent) 다단계 인터랙션 모델들에 기반한 인간과 디지털 아트의 상호작용을 위한 인터랙션 모델을 제시하였다. 두 번째 방법론으로서 사용자 분석적 접근(User Analytic Approach)의 측면에서 HCI 분야의 아우라(Aura) 개념을 도입하여 보는 주체의 방향(Direction)에 의존한 상호작용이라는 목적성을 가지고 재정의하였다. 결과적으로 이 두 방법론의 효과성을 검증하기 위해 공공디스플레이에서 인간과 디지털 아트 간의 상호작용을 향상시키기 위한 최종 인터랙션 모델(Interaction Model)을 제시한 다음, 테스트베드를 구축하고 실험하였다.