Toshiba Lighting & Technology Corporation

Other

Akiko Saitou

Hisashi Honda

Tsutomu Watanabe

Shigeru Osawa

Masahiro Izumi

Yoshiyuki Matsunaga

Hiroshi Kamata

Miho Watanabe

Ariyoshi Ishizaki

Nobuhiro Tamura

Takashi Yorifuji

Keiji Hatakeyama

Mitsuru Shiozaki

Noriyuki Hayama

Ryuji Soma

Akimasa Endou

Yuichi Sakakiabra

A glow discharge lamp has a discharge vessel, a pair of electrodes mounted in the discharge vessel, ionizable filling which is principally made of rare gas and filled in the discharge vessel, and emissive material containing zinc alloy and provided on at least one of the electrodes.

Glow discharge lamp, electrode thereof and luminaire

A translucent cover (,) is so provided as to cover a high pressure sodium lamp (,) adapted to radiate at least visible light and rays of light in the wavelength range of 300 nm to 400 nm. A photocatalytic film (,) which is capable of preventing generation of interference between visible light is formed on either one of or both the inner side and outer side of the translucent cover (,). The photocatalytic film (,) contains as the principal component titania (TiO,) of which the peak wavelength for visible light transmittance is nearly the same as the peak wavelength for visible light radiated from the high pressure sodium lamp (,). Ultraviolet light radiated from the high pressure sodium lamp (,) enhances oxidation and decomposition of substances performed by the photocatalytic film (,), thereby preventing grime and contaminants from adhering to the translucent cover (,). Even if the thickness of the photocatalytic film (,) is increased in order to make the photocatalytic function more effective, visible light radiated from the high pressure sodium lamp (,) effectively passes through the photocatalytic film (13) at the peak wavelength so that decrease in the illuminating efficiency is prevented.

Photocatalyst, light source and lighting device

A fluorescent lamp includes a light-transmitting envelope, means for generating a discharge within envelope, a discharge sustaining fill contained in envelope for emitting ultraviolet rays during the lamp operation and a phosphor layer coated on an inner surface of envelope. The phosphor layer converts the ultraviolet rays into visible light and ultraviolet radiation within a wavelength range of 320 nm to 410 nm so as to have radiant flux ratio of ultraviolet radiation of 5 to 50 percent of the entire radiant flux of the lamp.

Fluorescent lamp having visible and UV radiation

Growing community of inventors

Kanagawa-ken, Japan

Akiko Saitou