Efficacy Improvement of Mercury-Free Xe Flat Discharge Fluorescent Lamps by Increasing Xe Partial Pressure
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- Shiga Tomokazu
- The University of Electro-Communications
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- Yoshikawa Tomokazu
- The University of Electro-Communications
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- Mikoshiba Shigeo
- The University of Electro-Communications
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- Yasuda Makoto
- Hitachi Lighting Ltd.
Bibliographic Information
- Other Title
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- Xe分圧増加による水銀レスXe平面放電型蛍光ランプの発光効率向上
- Xe ブンアツ ゾウカ ニ ヨル スイギン レス Xe ヘイメン ホウデンガタ ケイコウ ランプ ノ ハッコウ コウリツ コウジョウ
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Abstract
The luminance and luminous flux of external-electrode, mercury-free, Xe flat discharge fluorescent lamp for LCD backlights and lighting equipment are equivalent to those of conventional Hg fluorescent lamps. However its efficacy is lower. In this paper, improvement of efficacy was attempted. First, the electrode width was reduced from 1.0mm to 0.5mm in order to widen the operating pressure margins. This enabled the Xe partial pressure to be increased from 1.2 kPa to 3.0 kPa, which increased efficacy 60%. Then a MgO, which has a high secondary electron emission coefficient, was coated on the dielectric layer, improving efficacy a further 10%. As a results, an efficacy of 35 lm/W with a luminance 10,100 cd/m2 were obtained with a 2.8-inch diagonal lamp.
Journal
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- JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
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JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 88 (8A), 517-521, 2004
The Illuminating Engineering Institute of Japan
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Details 詳細情報について
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- CRID
- 1390282679054388736
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- NII Article ID
- 110001143331
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- NII Book ID
- AN00268860
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- ISSN
- 1349838X
- 21851506
- 00192341
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- NDL BIB ID
- 7048894
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed