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Fluorescent lamp and lighting fixture

A technology for fluorescent lamps and light bulbs, applied in the field of fluorescent lamps and lighting appliances, can solve problems such as film peeling, reflective film cracking, disadvantages, etc., to achieve the effect of ensuring the film strength, high suppression effect, and suppression of mercury intrusion

Inactive Publication Date: 2008-02-27
TOSHIBA LIGHTING & TECH CORP
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] However, when the film thickness of the protective film is thick, the light reflection film may be cracked or peeled off
Therefore, in actuality, in a lamp on which a light reflecting film is formed, the film thickness of the protective film must be thinned, which is disadvantageous in terms of lumen maintenance factor.

Method used

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  • Fluorescent lamp and lighting fixture
  • Fluorescent lamp and lighting fixture
  • Fluorescent lamp and lighting fixture

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Embodiment Construction

[0052] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4 . Fig. 1 is a front view (opening part side) of the annular fluorescent lamp L1, Fig. 2 is an enlarged cross-sectional view showing an end face obtained by cutting along the line A-A of the arrow in Fig. Part of the electron micrographs, FIG. 4 is an iso-illuminance curve (iso-illuminance curve) when the ring fluorescent lamp L1 in FIG. 1 is turned on.

[0053] In addition, in the drawings, the film thickness and coating form of each film etc. are partially exaggerated for the convenience of explanation, and the dimensional ratio and the like of other constituent members are not the same as the actual ones.

[0054] In the illustrated annular fluorescent lamp L1, 1 is an annular glass bulb formed by bending a cylindrical glass tube such as soda lime glass or lead glass, 2 and 2 are mounts, and 11 11 is a sealing portion for sealing the socket 2 formed on the end of the ...

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Abstract

The present invention aims to realize a fluorescent lamp and a lighting instrument installed the fluorescent lamp, the fluorescent lamp restrains the light reflection membrane from membrane stripping, and makes lumen maintenance rate and exterior quality promote. The fluorescent lamp of the present invention has: a sealed tubular glass bulb; an electrode generating unit making the bulb generate discharge; a discharge medium enveloped into the bulb; a protective membrane formed at the internal surface of the bulb and the membrane thickness is 0.2 to 0.9 micrometer; a light refection membrane formed at the regulated position of the protective membrane, and containing more than or equal to 25wt percent strontium pyrophosphate phosphor particulate; and a fluorophor membrane formed at more nearby to the internal side part than the light reflection membrane. According to the present invention, it can promote the lumen maintenance rate through thickening the protective membrane and restrain the light reflection membrane from membrane stripping.

Description

technical field [0001] The invention relates to a fluorescent lamp provided with a light reflection film in a glass bulb and a lighting appliance using the fluorescent lamp. Background technique [0002] As is well known, in fluorescent lamps for general lighting, a light reflection film coated with white fine powder such as calcium pyrophosphate, titanium oxide, or aluminum oxide (alumina) is provided between the bulb and the phosphor film, thereby improving the light output from the opening. The light (in the non-formed portion of the light reflection film) is radiated to improve, for example, direct illuminance (illumination intensity). For example, when a straight tube-shaped reflective fluorescent lamp is mounted on a ceiling fixture and turned on with the side where the light reflection film is formed on the upper side, the light from the lower opening side where the light reflection film is not formed is concentrated. Radiating to the bottom of the appliance, the ill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/35F21V7/22
Inventor 中村光纪直木庄司吉田正彦
Owner TOSHIBA LIGHTING & TECH CORP
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