Panasonic Corporation

Shogo Toda

Yoshio Manabe

Hirofumi Yamashita

Takashi Maniwa

Kazuhiro Matsuo

Fumihiro Inagaki

Hideki Wada

Nozomu Hashimoto

Masaaki Hama

Katsumi Itagaki

A fluorescent lamp according to the present invention includes: a glass tubein which mercury and a rare gas are enclosed; a protective filmthat is attached so as to cover an inner face of the glass tube; and a phosphor layerthat is laminated on the protective film. The protective filmhas a thickness of 0.5 &#x3bc;m to 3 &#x3bc;m. Further, the protective filmis formed of inorganic particles and has a volume ratio of 0.1 to 0.5. Preferably, the inorganic particles are of at least one selected from the group consisting of aluminum oxide, silicon dioxide, magnesium oxide, zinc oxide, titanium oxide, cerium oxide, yttrium oxide, and calcium halophosphate.

Fluorescent lamp with glass tube and protective layer, method for producing the same, and lighting system

A fluorescent lamp including a glass bulb, a protection layer formed on an inner surface of the glass bulb, and a phosphor layer formed on a surface of the protection layer. The surface of the protection layer that is in contact with the phosphor layer has cracks. The bulk density of the metal oxide particles in the protection layeris 80% or more. The surface of the protection layerhas 20 to 200 cracks per millimeter in a tube axis direction. The average particle diameter of the metal oxide particles is in the range from 0.01 &#x3bc;m to 1 &#x3bc;m. The thickness of the protection layer is in the range from 0.5 &#x3bc;m to 5 &#x3bc;m.

Fluorescent lamp, backlight apparatus, and manufacturing method of fluorescent lamp

Growing community of inventors

Osaka, Japan

Shogo Toda