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AssigneePanasonic Corporation
InventorsHideki Wada, Hirofumi Yamashita, Shogo Toda, Yoshio Manabe, Takashi Maniwa, Nozomu Hashimoto, Kazuhiro Matsuo, Katsumi Itagaki
Estimating the term…
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 layer 32 is 80% or more. The surface of the protection layer 32 has 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 μm to 1 μm. The thickness of the protection layer is in the range from 0.5 μm to 5 μm.
A fluorescent lamp comprising:
A manufacturing method of a fluorescent lamp including a glass bulb, a protection layer being formed on an inner surface of the glass bulb, and a phosphor layer being formed on a surface of the protection layer, the manufacturing method comprising the steps of:
Dependencies are inferred from the claim text.