• 조명전기설비학회논문지
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• 제29권1호
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• pp.9-14
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• 2015

Due to the declining LED price and environment-friendly energy policies, CO2 emission reduction and energy-saving, the LED lighting industry is accelerating rapidly. In particular, the needs for LED lamp, replacing the existing fluorescent lamp without exchange luminaire or driver circuits, are also rapidly increasing. Therefore, replacement for T8 fluorescent lamp, LED T8 lamp was developed and standardized. However, except LED T8 lamps, other lamps' regulations or standards were not enacted. Also, the stability of fluorescent lamp substitutable LED lamp is low due to the difference in electrical characteristics and mismatch between the existing fluorescent lamp ballast and LED lamp. Therefore, many are struggling while developing fluorescent lamp substitutable LED lamp. In this paper describes the properties of existing fluorescent lamp ballasts and the considerations while developing fluorescent lamp substitutable LED lamp : demonstrating its validity by experiments the developed fluorescent lamp substitutable LED lamp prototype.

• 반도체디스플레이기술학회지
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• 제9권1호
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• pp.61-66
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• 2010

A flat luminaire utilizing 32" flat fluorescent lamp was developed and its optical characteristics were compared with that of the troffer using three T8 regular fluorescent tubes. The optical characteristics of the 32" flat luminaire was similar to that of the troffer.

• 수산해양기술연구
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• 제46권4호
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• pp.503-508
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• 2010

Common LED (Light Emitting Diode) lamp has many advantages to compare with fluorescent lamp, long life and no pollution matter like the mercury. The LED lamp is a good light source especially for shipboard lighting because of its compact structure which prevents explosion and shock. Also, low maintenance cost is expected due to its longer life time in comparison with conventional lamps. The LED lamp, however, need some estimates that change of voltage and frequency, vibration, moisture on board to definite accommodation of the LED lamp to shipboard. The purpose of this study is to compare physical properties of a fluorescent lamp with one of the common LED lamp so as to analyze accommodation of common LED lamp on board. This study was carried out in two stages. First, temperature, humidity of illumination, voltage, electric current, frequency and electric power were measured by using experimental equipments. Second, a comparative analysis of consumption electric power, annual oil charge, annual CO2 emission and lamp life time, etc of the fluorescent lamp and common LED one was made. As a result of the study, the consumption electric power of fluorescent lamp was 50% higher than one of the common LED lamp. As a result of measuring life time, it was found that life time of common LED lamp was more about 3.5 fold than one of the fluorescent lamp. Considering these results, it's thought that common LED lamp is verified that energy saving is possible and using is possible as substitute for fluorescent lamp on board.

• 한국위성정보통신학회논문지
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• 제10권1호
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• pp.77-82
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• 2015

본 논문에서는 LED 형광등에 활용이 가능한 컨버터 관한 연구를 수행하였다. 기존 고효율에너지 기자재로 지정된 형광램프용 고조도 반사갓이 LED 형광램프의 Heat-sink 구조상 활용할 수 없는 구조이기 때문에 LED 형광램프 컨버터의 에너지 효율이 뛰어난 회로 설계 및 보호회로 설계가 필요하다. 따라서 본 논문에서는 직관형 LED램프 컨버터에 회로구동방식을 적용한 LED 형광등 연구를 수행하였다. 또한, LED를 광원으로 한 'LED 램프'와 일반 상용 전원에 접속해 직류 전원을 공급할 수 있는 컨버터에 대하여 설계 및 제작을 하였다.

• 한국전기전자재료학회논문지
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• 제19권2호
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• pp.200-206
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• 2006

An electric power efficiency of electrodeless fluorescent lamp depens on a big relative property of gas, gas pressure, lamp formation, ingredients of magnetic substance and shape and action frequency etc. in lamp. We used magnetic substance that opens self-examination material of electrodeless fluorescent lamp antenna. We used Mn-Zn type as the Ferrite. We have examined resistance, impedance and Q-factor's frequency characteristic by ferrite. Coil turns were changed from 13 to 15 turns to recognize brightness change of lamp by winding number. Optical equipment (LS-100) was used to measure brightness. We could know Q-factor's difference according to material is important part of antenna design. When an electrodeless fluorescent lamp was made using T company's PE22, it showed the highest brightness. As number of winding is increased the brightness increased, and starting characteristic became good.

• 한국전기전자재료학회논문지
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• 제17권4호
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• pp.460-464
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• 2004

In recent, there have been several developments in lamp technology that promise savings in electrical power consumption and improved quality of the lighting space. Above all, the advantage of ring-shaped electrodeless fluorescent lamp is the removal of internal electrodes and heating filaments that are a light-limiting factor of conventional fluorescent lamps. Therefore, the life time of ring-shaped electrodeless fluorescent lamps is substantially higher than that of conventional fluorescent lamps and last up to 60,000 hours and is intended as a high efficacy replacement for the incandescent reflector lamp in many applications. In this paper, maxwell 3D finite element analysis program (Ansoft) was used to obtain electromagnetic properties associated with the coil and nearby structures. The electromagnetic emitting properties were presented by D simulation software operated at 250KHz and some specific conditions. Photometric characteristic of the ring-shaped electrodeless fluorescent lamp were investigated using LS-100 lightmeter and TA-0510 thermometer respectively.

• Journal of Biosystems Engineering
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• 제23권6호
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• pp.591-598
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• 1998

Light intensity and spectral characteristics of different types of fluorescent lamps were tested to investigate their possibility as the artificial lighting sources for the close illumination applied in the transplant production factory. Photosynthetic photon flux densitiy(PPF), illuminance and irradiance for all lamps decreased logarithmically with an increase of the vertical distance from the lighting source. The fluorescent lamp specially designed plant growth (PG lamp) showed a maximum spectral irradiance at the wavelength of 660nm. However, it showed lower irradiance than that of a standard fluorescent lamp at the range of wavelength between 500 and 600nm. On the other hand, PG lamp showed higher PPF and lower illuminance than those of the standard fluorescent lamp. The maximum peak of spectral characteristics for both of the single and twin three-bind fluorescent lamps was shorn at the wavelength of 545m and the next peaks were shown at the wavelength of 610nm and 435nm, respectively. Since the red fluorescent lamp has a narrower peak at the wavelength of 660nm, it may be useful for the supplementary red lighting. For three of standard, single three-band and twin three-band fluorescent lamps, the values of conversion factor for converting illuminance to PPF fell within the narrow range from 76 to 791x/$\mu$molㆍm$^{-2}$ ㆍs$^{-l}$ . However, for PG lamp, it was 29.71x/$\mu$molㆍm$^{-2}$ ㆍs$^{-1}$. Also, the values of conversion factor for converting PPF to irradiance of fluorescent lamp used in this study ranged between 4.85 and 5.34$\mu$molㆍm$^{-2}$ ㆍs$^{-1}$/Wㆍm$^{-2}$ .

• 한국환경복원기술학회지
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• 제11권6호
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• pp.73-80
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• 2008

본 연구는 남부상록수종 중 내음성과 내한성이 강하고 자생 송악(Hedera rhombea)에 대한 적정 실내광원과 광도를 알아보고자 가로 1m${\times}$세로 1m${\times}$높이 1m 크기의 목제프레임에서 실험을 실시하였다. 광원의 선정기준은 현재 지하철에 가장 많이 활용되는 인공광인 형광등, 삼파장형광등, 할로겐등으로 하고, 광도는 200Lux, 700Lux, 1,000Lux로 설정하여 실험을 실시한 결과는 다음과 같다. 1.송악(Hedera rhombea) 초장은 광원과 광도별 뚜렷한 통계적 유의성이 나타나지 않았으나, 할로겐등>형광등>삼파장형광등 순으로 광도별로는 1,000Lux>700Lux>200Lux 순으로 길었다. 분지수는 형광등이 삼파장형광등이나 할로겐등보다, 광도가 높을수록 많아지는 경향을 보였다. 엽수는 삼파장형광등 1,000Lux>형광등 1,000Lux>할로겐등 1,000Lux 순으로 나타났다. 엽장과 엽폭은 광원에 관계없이 광도가 낮을수록 넓어지는 경향을 나타났다. 엽록소함량은, 삼파장형광등과 할로겐등은 광도에 따른 차이를 볼 수 없었으나, 형광등에서는 200Lux>700Lux>1,000Lux 순으로 증가되었다. 송악의 전체적인 생육은 인공광원보다는 광도에 의해 확연한 차이를 보여, 지하철 실내식물로 200Lux라는 낮은 광도에서도 도입이 가능하나 원활한 생육을 위해서는 700Lux 이상으로 광도를 조절하는 것이 바람직하다. 2. 바위취(Saxifraga stolonifera)형광등이 광원인 경우, 광도와 무관하게 80% 이상이 고사하거나 생육 상태가 좋지 않았다. 광도가 200Lux에서는 광원에 무관하게 생육 상태가 매우 불량하였다. 초장, 엽수, 분지수, 엽장, 엽폭 등 생육은 할로겐 1,000Lux>삼파장형광등 1,000Lux>삼파장형광등 700Lux순으로 증가하였다. 엽록소함량은 삼파장형광등 700Lux>삼파장형광등 1,000Lux>할로겐등 1,000Lux순으로 높았다. 따라서, 본 실험에서 바위취는 할로겐등에서 가장 좋은 생육을 나타내었으며, 형광등의 광원과 700Lux 이하 광도에서는 현장적용이 불가능한 수종임이 확인되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 추계학술대회 논문집 Vol.17
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• pp.531-534
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• 2004

In Recent, it became necessary to develope the technology about electrodeless fluorescent lamp according to demand of the electodeless fluorescent lamp system that used higher efficiency and advantage of long-lifetime. Especially, in the electordeless fluorescent lamp which used H-mode, efficiency of lamp is decided from matching parameter of antena and inverter. So it is of the utmost importance to design antena and inverter Therefore, this paper used a transformer principle for efficiency rising of electrodeless fluorescent lamp and interpreted an equivalent circuit, used an impedance analyzer in order to confirm a performance enhancement of lamp along design of antenna, and confirmed parameter characteristic of R, L, C, Z, Q-factor along a change of magnetic flux density. Also, this paper confirmed a luminance characteristic of electordeless lamp along parameter change with measuring optical characteristic along a change of magnetic flux density

• 조명전기설비학회논문지
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• 제17권2호
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• pp.34-40
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• 2003

본 논문에서는 무전극형광등용 전원장치에 대한 전기적 및 광학적특성을 알아보기 위하여 성능측정을 수행하였으며, 무전극 형광램프의 고 수명에 대한 전원장치의 이론적인 평균고장수명을 알아보기 위하여 MIL-HDBK-217방법에 의한 예측방법을 이용하여 전원장치의 주위온도, 사용장소 및 설치조건에 따라 각 온도별로 각부품의 고장율을 예측하여 평균고장수명을 예측하였다. 그 결과 무전극형광등은 온도가 어느 정도가 유지되어야 광 효율이 좋은 반면 전원장치는 온도가 높으면 상대적으로 수명이 급격히 줄어들면서 특성이 열화하는 경항을 가진다.