• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.103-108
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• 2004

The plasma tube array display is expected to realize the wall size display with very high luminous efficacy. The cell design for high luminous efficacy was investigated. Also discharging in plasma tube was observed to investigate the structure for high luminous efficacy. As the result, high luminous efficacy of 5.4 lm/W was achieved.

• Journal of Electrical Engineering and Technology
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• 제6권1호
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• pp.123-127
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• 2011

To clarify the relations of optical properties to the main factors responsible for the loss and damage of luminous efficacy, a 20 min turn-on/turn-off test for 2,000 h for a ceramic metal halide lamp is conducted. The corrosion rates of the arc tube wall and electrode are estimated based on thermal stress. Wall blackening is attributed to the tungsten being transported from the hot electrode tips to the relatively cold arc tube wall. Furthermore, the grain boundaries of the arc tube are changed by the degradation. Distortion of the electrode is observed, and the ignition and the driving voltage of the load both increase. Finally, the color rendering index and the color coordinates are changed after the degradation. The luminous flux and the intensity of the luminous distribution are decreased significantly.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 하계학술대회 논문집
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• pp.378-379
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• 2009

High intensity metal halide discharge lamp performance, specifically the generated luminous flux and light color content, depends critically on the arc tube design. Factors influencing the design and consequent lamp efficacy include : lamp size, geometry, arc tube composition, fill chemistry, electrode design and excitation modes. Shaping of Polycrystalline Alumina(PCA) can be realized by conventional ceramic processes. Several processes are applied nowadays. Well-known in the ceramic high pressure field for decades are the pressing and the extrusion method. Newly developed slurry and precious forming technologies give the one-body seamless tubes, which improve thickness uniformity and lighting performance. Now, we reported some optical properties with different arc tube structures of ceramic metal halide lamps.

• 한국조명전기설비학회지:조명전기설비
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• 제10권4호
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• pp.53-61
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• 1996

광원에 대하여 서로 다른 여러 각도방향에서 광원을 바라볼 때 관측되는 광도 분포 및 재귀반사성능을 측정하기 위해 광도 분포 측정장치(배광측정기)를 제작하였다. 이 장치는 광원을 좌우로 360도, 상하로 $\pm$30도 회전 시킬수 있는 광원회전장치, 광검출기로 광전자증배관(PM Tube)을 쓰는 수광부 및 재귀반사성능 측정용 투광기와 제어 및 표시부로 구성되어 있다. 광도측정범위는 0.01~199900cd, 관측각범위는 0.2~1.5도 이고 광도의 측정오차는 $\pm$3%이다. 제작된 장치의 구조와 성능평가결과가 제기되었다.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2005년도 추계 학술대회 논문집
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• pp.87-95
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• 2005

삼중수소를 사용하는 자발광유리관의 제조에 필요한 4가지 핵심 기술 중 레이저를 이용한 밀봉/절단기술을 개발하였다. 상용 제품을 분석한 결과 유리관의 재질은 pyrex 이었고 레이저는 유리가공에 적절한 펄스형 이산화탄소 레이저를 사용하였다 유리관의 밀봉/절단에 영향을 미치는 인자들로는 레이저빔의 강도 지속시간 조사 방법, 유리관 내부의 압력 등이었다. 전 공정은 2단계로 이루어져 1단계에서는 삼중수소를 주입하고 유리관의 양단을 밀봉하였으며 2단계에서는 삼중수소가 봉입된 유리관을 원하는 길이로 밀봉/절단하였다. 각 공정에서 유리관의 밀봉은 defocusing된 레이저빔을 사용하였으며 절단은 focusing된 빔을 사용하였다. 밀봉/절단 후에는 잔여 열응력에 의한 파열을 방지하기 위하여 열처리를 하였다.

• 대한전기학회논문지
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• 제32권5호
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• pp.164-169
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• 1983

A method to control the luminous colour of a gaseous discharge tube has been investigated by using the saw-tooth wave of which rise-time was controlled by an electronic circuit. The luminous colour of a Ne - Hg lamp was changed from red to blue continuously and vice versa, and it's luminous characteristics are as follows: (a) With D.C. potentials, it showed blue colour and the relative intensity of the colour is increased first and saturated at about 17 mA as the discharge current is increased. (b) When the rise-time of the saw-tooth wave is about 10 $\mu\textrm{s}$, the red colour which is caused by Ne - excitation is dominant, and when about 200 $\mu\textrm{s}$, only the blue colour which is caused by Hg - excitation is shown. (c) With saw-tooth pulse, the relative intensity of blue is increased similarly as that with D.C. potential as the current peak of each pulse is increased, while that of red is increasing continuously and it's intensity shows about twice than blue. (d) The spectrum of red colour contains Ne - excitation lines and Hg - blue lines, but the apparent luminous colour is red because Ne - red lines are more plenty than Hg-blue lines. The spectrum of blue colour presents only Hg-blre lines.

• 전기학회논문지
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• 제57권12호
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• pp.2244-2248
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• 2008

High intensity metal halide discharge lamp performance, specifically the generated luminous flux and light color content, depends critically on the arc tube design. Factors influencing the design and consequent lamp efficacy include : lamp size, geometry, arc tube composition, fill chemistry, electrode design and excitation modes. Shaping of Polycrystalline Alumina(PCA) can be realized by conventional ceramic processes. Several processes are applied nowadays. Well-known in the ceramic high pressure field for decades are the pressing and the extrusion method. Newly developed slurry and precious forming technologies give the one-body seamless tubes, which improve thickness uniformity and lighting performance. Now, we reported some optical properties with different arc tube structures of ceramic metal halide lamps.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.367-370
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• 2007

An EEFL with the sodium free alumino-silicate glass of high K and low $tan{\delta}$, has been investigated. As compared with borosilicate and the soda-lime EEFLs, the luminous efficiency as well as the pinhole stability of new EEFLs improves remarkably without blackening of $NaHg_2$.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 1996년도 추계학술발표회논문집
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• pp.53-56
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• 1996

In this paper, the pulsed mode operated gas discharge tube is composed with mixed gas of Hg-Ne (10 Torr), in the tube of 15.0 mm outer diameter and has variable color from red to blue with changing frequency high voltage. As increasing frequency in the gas discharge tube, the phenomena, that the electron temperature in the positive column increases and the radiation from atoms of higher upper state energy levels increases, exist The color have the locus from red (0.4972, 0.3128) to blue (0.2736, 0.2619) in CIE chromacity diagram with increasing frequency. The method of changing frequency has been shown to be suitable for the luminous color control.

• 한국화재조사학회논문지
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• 제11권1호
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• pp.31-36
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• 2008

본 연구는 현장에서 발생한 가로등 화재에 대한 원인을 규명하기 위한 것으로 검증실험과 다양한 분석을 수행하였다. 이물질이 부착된 250W 메탈할라이드등은 $410.4^{\circ}C$로 급격하게 온도가 상승하였다. 따라서 환기 및 방진에 대한 개선이 요구된다. MH 램프에 의한 열은 발광판에서 유리구, 등기구로 이어지며 확산되었다. 메탈할라이드등의 사고원인은 등기구 내부의 이물질이 침적되어 축열 및 화재로 이어진 것으로 추정되며, 등기구의 설계에 있어서 외부 이물질 또는 분진이 침적되지 않으면서 축열이 되지 않는 구조 개선이 요구된다.