FLUORESCENT LAMP AND LIGHTING FIXTURE
PROBLEM TO BE SOLVED: To provide a circular fluorescent lamp, and a lighting fixture, endowed with an ability of restraining the transmission of light with a wavelength of 400 nm or less. SOLUTION: The circular fluorescent lamp 1 is provided with a circular discharge tube (a glass tube) 4, an ultrav...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
15.09.2005
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide a circular fluorescent lamp, and a lighting fixture, endowed with an ability of restraining the transmission of light with a wavelength of 400 nm or less. SOLUTION: The circular fluorescent lamp 1 is provided with a circular discharge tube (a glass tube) 4, an ultraviolet inhibiting layer 2 fitted on an inside face of the circular discharge tube, and a phosphor layer 3 fitted on the ultraviolet inhibiting layer. The ultraviolet inhibiting layer 2 has a function of inhibiting the transmission of light with a wavelength of 400 nm or less. The ultraviolet inhibiting layer 2 can contain at least one out of titanium oxide, antimony trioxide, zinc oxide, and iron oxide. A film thickness of the ultraviolet inhibiting layer 2 is to be 0.15 to 1.25 μm. COPYRIGHT: (C)2005,JPO&NCIPI |
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Bibliography: | Application Number: JP20040139607 |