• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제52권9호
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• pp.400-406
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• 2003

Efficient electrodes are devised for organic luminescent device(OLED). ITO electrode is treated with $O_2$ plasma. In order to inject hole efficiently, there is proposed the shape of anode that inserted plasma polymerized films as buffer layer between anode and organic layer using thiophene monomer. In the case of device inserted the buffer layer by using the plasma polymerization after $O_2$ plasma processing for ITO transparent electrode, since it forms the stable interface and reduce the moving speed of hole, the recombination of hole and electronic are made in the emitting layer. Therefore it realized the device capability of two times in the aspect of luminous efficiency than the device which do not be inserted the buffer layer. Experiments are limited to the device that has the structure of TPD/$AIq_3$, however, the aforementioned electrodes can similarly applied to the organic luminous device and the Polymer luminous device.

• International Journal of Aerospace System Engineering
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• 제4권2호
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• pp.5-9
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• 2017

In a pressurized fuel supply system of aircraft, a flow passage opening device is required to keep fuel continuously transferred from one tank to the other. The device utilizes balancing weights in order to follow up an acceleration at special conditions such as negative g. It is very difficult to test the device in a real high-speed and high-altitude test since severe test conditions and expensive supports are needed. Therefore, this paper deals with performance analysis of a flow passage opening device through low speed aircraft captive flight tests (CFT) including roll and negative-g maneuvers. It is shown that balancing weights in the device can open the passage in accordance with fuel position.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.705-706
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• 2006

A novel plug and play system for a mobile device has been proposed and demonstrated to provide an easy inter-operation between the mobile device and external modules. It supports an automatic installation and execution of the device drivers stored in the external modules into the mobile devices when the external module is connected to the mobile device. It also enables an automatic removal of the derivers when the external module is disconnected from the mobile device, which makes the user use the resource of the mobile devices more efficiently.

• 대한건축학회연합논문집
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• 제20권6호
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• pp.105-112
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• 2018

The purpose of this study is to develop an application that supports a user in the maintenance of small photovoltaic device. To this end, this study analyzed the maintenance status, related regulations and existing application contents in Korea. According to the analysis results, most users did not maintain device for themselves. In addition, the maintenance market has not been activated due to its low profitability. Regulations on the maintenance of photovoltaic device prescribed by the KESCO and Japanese counterpart were analyzed to establish the standards for photovoltaic device inspection, and an application was developed based on the existing applications and research results. In order to evaluate the completeness and satisfaction of the developed application, it surveyed 52 users and 22 experts. The survey results showed that the completeness was calculated to be 90 points, and the level of satisfaction was 93 points on a 100-point scale. Therefore, it is expected that the maintenance application developed in this study will be useful for users to maintain the photovoltaic device.

• 한국컴퓨터정보학회논문지
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• 제20권10호
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• pp.7-13
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• 2015

Wearable device, next generation smart device, is consistently growing. The flexible display will be a kind of display in the wearable device. The flexible display technology is now evolving with end-user requirement such as portability and easy installation. Previous wearable display products still have some difficulties in manufacturing and in flexibility whole device. But it can be a flexible display with LED device and utilized in commercial area. In this paper, we propose a driver to control the LED display and implement a flexible LED display system.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.1587-1590
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• 2006

Through the engineering of recombination region and energy transfer in organic light emitting device, blue and red light emitting device with good color stability has been successfully obtained. A Color control layer (CCL), which emits green light through the energy transfer from the emission layers, has been introduced into the blue and red light emitting device for RGB white OLED. The RGB white OLED showed the current efficiency of 13 cd/A and the CIE coordinates of (0.33, 0.38) at $1000\;cd/m^2$. The device exhibited very stable spectrum with respect to operating current density and the CIE coordinates varied from (0.34, 0.38) to (0.31, 0.37) for $100-22000\;cd/m^2$.

• 지능정보연구
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• 제17권2호
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• pp.119-128
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• 2011

최근 사용자 정보와 주변 환경의 정보를 수집할 수 있는 센서의 기술과 휴대 디바이스의 성능이 매우 발달되어 왔다. 이러한 기술 발달로 인해 사용자는 매우 다양한 콘텐츠를 이용할 수 있게 되었다. 그러나 사용자가 휴대한 디바이스의 특성에 따라 이용할 수 있는 콘텐츠가 제한적이다. 이것을 해결하기 위해 하나의 콘텐츠를 여러 디바이스에서 사용하기 위한 연구가 활발히 진행 중이다. 본 연구에서는 사용자 주변의 센서를 통한 다양한 정보를 수집하여 사용자의 상황에 맞는 특정 콘텐츠를 선정하고, 선정된 콘텐츠를 사용자가 휴대한 디바이스 특성에 맞게 변환하여 서비스를 제공하는 시스템을 제안한다.

• 대한의용생체공학회:의공학회지
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• 제41권4호
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• pp.165-171
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• 2020

In this study, it focuses on the development of radiographic devices for patellar imaging. On the previous X-ray examination of patella and patellofemoral joint, it analyzed the problems which could affect the results: unstable patients' pose, radiation exposure, and deterioration of image quality. The purpose of the research is to propose a future use of a developed device with an explanation of the process, function, and advantage of the device including the methods. The device is developed to focus on the diagnosis of the longitudinal and longitudinal fractures of the patella and patella/femoral joint, displacement such as dislocation, bone formation, stenosis of the patella/femorla joint, and cartilage wear. Due to the patient's anxious posture, it caused a shaking image, overlapping structures, and etcs, these factors challenge to diagnose accurately. In addition, the existing Settegast method and Hughston method, which are most frequently performed in the hospital field, are not suitable for the presence or absence of features or dislocation due to the heavy load on the patella of the patient. The developed device requires patients in a lying position and placing only their leg on the device, it increases the conveniences of the examination and decreases unnecessary radiation exposure of the patient except the patellar examination area. Moreover, one of the systems in the device fixes the detector, where the patients no longer need to hold the detector nor be in unstable posture, but describes the structure of the patella/femoral joint more clearly. Hoping the device will apply to more patients.

• 대한의용생체공학회:의공학회지
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• 제23권5호
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• pp.385-390
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• 2002

오늘날 의료기기의 국산화 연구가 활발히 진행되고 있는 가운데 본 연구에서는 적추용 fusion device를 새롭게 개발하고자 시도하였다. 일반적으로 사용되고 있는 삽입형과 나사형을 기본 대상으로 하되 수술 시 뼈를 보다 적게 제거하여 삽입할 수 있게 하는 데 .) 주안점을 두고 형상 개발을 시도하였다. 아직 그 실효성을 논하기는 어려우나 고안된 척추용 fusion device의 형상을 중심으로 소개하고자 한다. 본 연구에서 경첩형과 분리삽입형을 고안하게 되었다. 그러나 경첩형은 기존 형상의 절반 크기로 삽입되는 장점은 있으나 핀의 강도해석과 안정된 잠금 장치의 개발에 더 연구가 요구되어 일단 본 연구에서는 분리삽입형을 중심으로 시제품과 3차인 유한요소 모델을 제작하여 그 역학적 해석을 행하였다. 그 결과 척추에 작용하는 기본 하중에 대한 역학적 안전성은 인정되나 아직 실용화되기까지는 보조 수술장비의 개발이 필요하다고 사료된다.

• 한국전자통신학회논문지
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• 제15권6호
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• pp.1113-1122
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• 2020

최근 묻지마식의 강력범죄가 계속 일어나면서 여성 및 노약자들의 피해가 심각해지고 있다. 기존 시스템으로는 CCTV는 많이 설치되어 있으나 범죄가 일어난 후 사후 조치에 그쳐 범죄를 예방하기에는 어려움이 많이 발생하고 있는 바 아파트나 빌딩등 음영지역과 폐쇄 공간등에서의 사건 사고를 본 장치를 통하여 범죄를 방지하고자 본 기술을 연구하여 제품과 소프트웨어를 개발한다. 범죄로 예상되는 행위,행동의 움직임의 특정 대상을 영상분석 빅데이터 기술과 융합 센서 기술을 이용하여 운영되고 있는 CCTV 장치 혹은 경보의 이벤트를 받고자 하는 특정장소에 통신기술을 이용하여 경보 신호를 보내주는 장치 개발한다. 본 개발 장치는 범죄 발생을 사전에 예측하여 실시간으로 범죄발생을 경보 신호로 처리하여 전송해주는 장치로 사용되는 소비자들에게 본 장치를 연구 개발하여 저가의 장치를 공급하며 단독형 장치와 서버를 구성하여 연결되는 장치를 제공하게 된다.