Special Arrangement of Phosphor Particles in Screen for Optimization of Illuminance (lm m-2) of FL Tubes
Volume 3, Issue 6, December 2015, Pages: 261-272
Received: Sep. 12, 2015;
Accepted: Sep. 21, 2015;
Published: Oct. 8, 2015
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Lyuji Ozawa, Japanese Government Licensed Consultant in Science, Champing Qu, Beijing, China
The performance of lighted FL tubes is severely influenced by the depth of the gap between phosphor screen on inner glass wall and positive column which is defined by Fvect ≥ Fphos. Fphos is vertical electric field of the surface bound electrons (SBE) on electric insulator in vacuum. The SBE on phosphor particles in the screen of the commercial FL tubes pushes back approaching electrons from phosphor screen to positive column. Naturally, there is the gap between positive column and phosphor screen. The depths of the gap ever study on the lighted FL tubes quantitatively. The depth by the gap by SBE is 3 x 10-3 m that gives rise to the slow build - up curve of illuminance from FL tube. Unexcited Hg atoms in the gap severely control the illuminance (lm m-2) of FL tubes. The reliable FL tubes should have the depth of the gap less than 2 x 10-4 m. The formation of the narrow gap requires the special arrangement of (a) the low voltage CL phosphor particles and (b) PL phosphor particles side by side. The coil-EEFL tubes in the narrow gap allow the Ar gas pressures (>7 x 103 Pa) for the high illuminance (>103 lm m-2) with nearly zero power consumption by the DC operation.
Special Arrangement of Phosphor Particles in Screen for Optimization of Illuminance (lm m-2) of FL Tubes, Science Research.
Vol. 3, No. 6,
2015, pp. 261-272.
F. Meyer, US pat. 2, 182, 732, 1928.
L. Ozawa, “Development of new electron sources for coil - EEFL tube”, Science Research, 3, pp 220 - 229, 2015 (http: //www.Sciencepublishinggrop.com/j/sr).
L. Ozawa and Y. Tian, “New electron source and electron collection source in FL tubes” J. Inf. Display, 12, pp 69 - 74, 2011, by L. Ozawa and Y. Tian for remove.
L. Ozawa and Y. Tian, “A new 4G electron source for FL tubes”, J. Chinese Ill. Engs, 7, pp 58 - 65, 2012.
“Phosphor Handbook, second Edition”, by edited by W. M. Yen, S. shionoya, and H. Yamamoto, CRC Press, Taylor Francis Group, Roca Raton, London, New York 1998.
L. Ozawa, “Electric charges on phosphor particles determine features of lighted FL tubes”. International Journal of Engineering sciences & research technology, 4, pp 91 - 106, 2015, (published online; http: //www.ijerst.com).
L. Ozawa, “Cathodoluminescence” Kodansha Scientific, Tokyo, Japan, 1990.
L. Ozawa, “Cathodoluminescence and Photoluminescence”, CRC Press, Taylor Francis Group, Roca Raton, London, New York 1998.
F. A. Kroger, “Some aspect of the luminescence of solids”, Elsevier Pub. Co., New York, `1948.
H. W. Leverentz, “An introduction of luminescence of solids”, John Wiely & Sons Inc., London, 1950.
F. M. Penning, “Electrical discharges in gases, The Macmillan Company, New York, 1957.
J. F. Waymouth, “Electric Discharge Lamp”, MIT Press, 1971.
Handbook of “Electric Discharge lamps”, Japanese Institute of Electric Engineers, 1973.
L. Ozawa and Y. Tian, “Calculation of the quantum efficiency of phosphor screen in CRTs and FL tubes”, J. Inf. Display, 11, pp 128 - 133, 2010.
Yul-Shin Fran and Tseung-Yuen Tseng, “Involvement of scattered UV light in the generation of photoluminescence in powdered phosphor screens”, J. Phys. D: Appl. Phys. 32 pp513 - 517, 1999.
L. Ozawa, “Illuminance of FL tubes controlled by the depths of gap between positive column and phosphor screen”, Science Research, 3, pp 93 - 104, 2015, (published online; http: //www.Sciencepublishinggrop.com/j/sr).
L. Ozawa, “coil - EEFL tubes as unrivaled light source with small Wcoil over solid light sources”, Science Research, 3, pp 230 - 239, 2015, (published online; http: //www.Sciencepublishinggrop.com/j/sr).