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장인현(In-Hyun Jang),김유신(Yu-Sin Kim),최안섭(An-Seop Choi) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
The purpose of this study is to prepare basis data that can be practically used for technology development of efficient way of LED dimming. Therefore, an electric current, illuminance, brightness and color coordinates by LED dimming were measured. compared and analyzed. The entire range of dimming was divided by steps, and electric current and illuminance were measured for LED lamp and fluorescent lamp. Eventually, this research intends to find out the luminous quantity and characters of LED lamp according to the different dimming levels.
장인현(In-Hyun Jang),김유신(Yu-Sin Kim),최안섭(An-Seop Choi) 한국조명·전기설비학회 2010 조명·전기설비학회논문지 Vol.24 No.10
Until now, dimmable fluorescent luminaires has been widely used for dimming systems, and LED is currently attracting attentions as a alternative lamp due to environmental problem issues. LED, one of eco-friendly high efficiency lamp, has advantage that dimming is easy than fluorescent luminaire. But there have been not enough research on technical development and application for LED dimming. Therefore, to analyze luminous quantity of dimmable LED, the illuminance, color temperature, luminance, and current were measured in the whole range of dimming. In the results of this study, the dimmable LED of various types showed a similar trend in the changed luminous quantity by dimming.
색온도 구현방법에 따른 LED램프의 소비전력 측정 및 분석
장인현(In-Hyun Jang),홍성관(Seong-Kwan Hong),최안섭(An-Seop Choi) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.2
The purpose of this study is to find an efficient way using dimmable LED lamps to describe specific target illuminance and color temperature. This study used 14 dimmable LED lamps as same or different color temperature. The method of study is to measure of electric power consumption using different color temperature of dimmable LED lamps that were combination of two or three dimmable LED lamps by simultaneously dimming. Through this method, the electric power consumption was compared with all combinations of the illuminance and color temperature.
동일 및 조합된 색온도 구현에 따른 LED램프의 소비전력 비교분석
장인현(In-Hyun Jang),홍성관(Seong-Kwan Hong),최안섭(An-Seop Choi) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
This study describes two methods through the combination of two dimmable bar type LEDs for a specific target illuminance and color temperature. This two methods were compared and analyzed based on the measured electric power consumption for a specific target illuminance and color temperature. Therefore, to make a specific target illuminance and color temperature through the combination of two dimmable bar type LEDs, an appropriate method between two methods was presented in this study.
LED 조명기구의 단일 및 조합 색온도 구현에 따른 주관적 반응 평가
장인현(In-Hyun Jang),김경실(Kyoung-Sil Kim),최안섭(An-Seop Choi) 한국조명·전기설비학회 2011 한국조명·전기설비학회 학술대회논문집 Vol.2011 No.5월
This study compared subjective response for combining color temperature and single color temperature of LED lights. To compare two methods, the space was divided into two sections by drawing the black-out curtains in the middle of the room and subject looked at the two sections at the same time and filled in an evaluation form consisted of brightness, comfortableness, clearness, normalness, glare, and preference. The test was conducted in the same illuminance and color temperature. The purpose of this study is to judge the application of LED luminaire that can make various color temperature by comparing the qualitative results.
장인갑(In-Kab Jang),이동원(Dong-Weon Lee),정의봉(Eui-Bong Jeong),유구현(Gu-Hyun Ryu),강동석(Dong-Suk Kang) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4
Dynamic characteristic test of a vehicle-mounted equipment is to verify the authenticity. In particular, the vulnerable equipment mounted on vehicle, such as mobile computing equipment must be carried out. This study is designed to provide minimum standards for vibration mounted 40 feet Shelter commercial computing equipment. Also provided the basis for the design, and then by analyzing the obtained data. Application of test data and this process is thought to be helpful in the development of cost-effective military equipment.