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ICP 광원 시스템의 Ne:Xe 및 Ne:Ar 혼합가스의 전자온도의 전자밀도 특성
崔起承(Gi-Seung Choi),李鐘餐(Jong-Chan Lee),崔龍成(Yong-Sung Choi),朴大熙(Dae-Hee Park) 대한전기학회 2006 전기학회논문지C Vol.55 No.3
In whole world consciousness of environment maintenance have increased very quickly for the end of the 20th century. To use and disuse toxic substances have been controled at the field of industry. Also the field of lighting source belong to environmental control. And in the future the control will be strong. In radiational mechanism of fluorescence lamp mercury is the worst environmental problem and root. In the mercury free lighting source system the Xe gas lamp is one type. And the Ne:Xe and Ne:Ar mixed gas lamp improve firing voltage of Xe gas lamp. Purpose of this study is to understand ideal mixing-ratio of Ne:Xe and Ne:Ar gas by electron temperature and electron density for mercury free lamp. Before ICP was designed, basic parameters of plasma, which are electron temperature and electron density, were measured and calculated by single-Langmuir probe. Property of electron temperature and electron density were confirmed by changing ratio of Ne:Xe and Ne:Ar.
ICP 제논 램프의 가스 압력과 공급 전력에 따른 광학적 특성연구 (pp.1659-1660)
최기승(Gi-Seung Choi),이성진(Seong-Jin Lee),이종찬(Jung-Chan Lee),박대희(Dae-Hee Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
After end of the 20th environmental problem was became issue. So about mercury free lighting sources are being studied very much. In this paper, a mercury and electrode free bulb was designed. in this bulb was injected mixed of Xe, Ne and Kr Gases. and then the bulb was discharged by 13.56㎒ RF Power after spectrum, color coordinates and brightness were measured by spectrum meter CS-1000. Measured results were compared and analyzed, also analysis was able to do a characteristic of a gas defensive fight in proportion to a mixing ratio. Therefore the most of high brightness which was 4500㏅/m2 was gained in 1:1 ratio of Xe:Ne at 60W input power.
이승민(Seung-Min Lee),허인성(In-Sung Her),김민수(Min-Soo Kim),최기승(Gi-Seung Choi),이종찬(Jong-Chan Lee) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
본 논문은 LED 조명기구의 성능을 좌우하는 2차 광학계 반사판을 실측된 메탈할라이드 투광등 배광특성을 목표로 하여 반사판의 최대 크기 높이 6 [㎜], 폭 6 [㎜]로 설정하여 OptisWorks를 이용해 parabola 반사판을 설계하였다. 반사판의 높이가 감소함에 따라 배광 각이 좁아짐을 확인하였고, parabola의 중심의 요소 변화에 따라 사이드 부분의 광도가 변화하는 것을 확인 하였으며, 배광곡선 목표와 편차가 있었지만 목표 배광각과 균일한 조도 특성을 만족하였다. 또한 97.7%의 광효율 특성을 확인 하였다.
PCB 구조적 설계에 따른 LED Module의 열적 광학적 특성 (pp.1275-1276)
이승민(Seung-Min Lee),이성진(Seong-Jin Lee),최기승(Gi-Seung Choi),이종찬(Jong-Chan Lee),박대희(Dae-Hee Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
As developing the information society, Lighting Emitted diode(LED) which is light source for illumination of next generation is attracted public attention. LED have many problem as narrow light view angle, high price, drift phenomenon of color coordinate, high heating problem for lower power, lower weight and small size. So, many researches have continued in a illumination as LED module type. in this problem, heating problem is very important and difficult and that is caused in decreasing phenomenon of brightness and drift phenomenon of color coordinate. so the problem of heating is urgent question for illumination of LED. In this paper, structural design of PCB changed as two type for solving the heating problem. also the properties of heating is analysed and optical properties is measured with heating image camera and spectrometer according to change in this design.
무전극 형광램프의 주파수 변화에 따른 온도 및 광속 특성 (pp.1733-1734)
이주호(Lee Joo Ho),최기승(Choi Gi Seung),김남군(Kim Nam Goon),박노준(Park Noh Joon),박대희(Park Dae Hee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In recent, it became necessary to develop the technology about electrodeless fluorescent lamp according to demand of the electrodeless fluorescent lamp system that used higher efficiency and advantage of long lifetime. Inductively coupled plasma is commonly used for electrodeless lamp due to its ease of plasma generation. An electric power efficiency of electrodeless fluorescent lamp has big relative property of gas in lamp, gas pressure, lamp formation, ingredients of magnetic substance and shape and action frequency etc. We used magnetic substance that open self-examination material of electrodeless fluorescent lamp antenna. Ferrite that is used in this experiment was Mn-Zn type. We have examined temperature and flux characteristic by frequency. Considering using frequency 2.65[㎒], Frequency was changed from 2.05[㎒] to 3.05[㎒] to recognize flux and temperature change of lamp. I used LMS(Lighting Measurement System) to measure flux and IR Camera to measure temperature of lamp.
외부전극 형광램프를 위한 유도-용량형 플라즈마의 휘도특성
이성진(Seong-Jin Lee),최기승(Gi-Seung Choi),채수길(Su-Gil Chai),박대희(Dae-Hee Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
An external electrode fluorescent lamps (EEFLs) have the advantage of a long lifetime in the early stages of the study on plasma discharge, interest in the lamp continues. Studies on the operation of external electrode fluorescent lamps have focused mainly on its use of a type of high frequency (㎒). By performing high brightness using a square wave operation method with the low frequency below 100㎑, which is applied to a narrowed tube type lamp that has several ㎜ of lamp diameter. To solve these problems of CCFL, EEFL (External Electrode Fluorescent Lamp) is introduced. Because electrode of EEFL is on the outer surface of discharge tube, the electrode is perfectly prevented from the sputtering by accelerated ions. And it is possible to drive the many CCFLs at the same time, because EEFL shows the positively resistant characteristic. But EEFL has the large non-radiative power loss in sheath. In this study the novel electrode structure was introduced in order to reduce non-radiative power loss in sheath of EEFL. The novel electrode structure comes from the idea to combine conceptually capacitive discharge with inductive discharge. Thus, this study verifies the change in the optical characteristics according to the change in electrode structure through a Maxwell's electromagnetic field simulation and examines the relationship between the change in the EEFL electrode structure and brightness by measuring the optical characteristics.