Toshiba Lighting & Technology Corporation

Kabushiki Kaisha Toshiba

Toshiba Materials Co., Ltd.

Ryotaro Matsuda

Jun Sasaki

Keiichi Shimizu

Makoto Sakai

Kiyoshi Nishimura

Takayoshi Moriyama

Kozo Ogawa

Hideki Okawa

Yumi Hanyuda

Naoto Mori

Takeshi Osada

Yasuhiro Shirakawa

Akiko Saito

Shigeru Osawa

Masami Okamura

Asuka Wada

Akira Sato

Hiroshi Matsushita

Nobuhiko Betsuda

Kayo Nakano

Yuichiro Takahara

Kazunari Higuchi

Masahiro Izumi

Takeo Yasuda

Hiroki Tamai

Masahiro Toda

Kenji Takanashi

Takumi Suwa

Yoshiyuki Matsunaga

Aiko Takahashi

Akiko Takahashi

Ariyoshi Ishizaki

Hiromichi Nakajima

Toshifumi Masuda

Junichi Kimiya

Hiroshi Takenaga

Yoshihiro Aonami

Yoshiro Oka

Naoto Tokuhara

Kiyoshi Yokokura

Kazunari Otsuka

Takaya Kamakura

A light-emitting device includes a substrate having a front surface on which a semiconductor light-emitting element is mounted. A front cover is provided which thermally contacts the front surface of the substrate at a periphery of the semiconductor light-emitting element and is disposed on a front side of the substrate. A heat conduction path is formed along which heat generated by the semiconductor light-emitting element is conducted in order of the substrate and the front cover and the heat is radiated from a front surface of the front cover, so that a heat radiation property from a front surface of the light-emitting device is improved.

Light-emitting device and lighting apparatus

According to one embodiment, a light-emitting unit includes a light-emitting section, a diffusion cover, and a reflector. The light-emitting section includes an LED element. The diffusion cover diffuses light emitted from the light-emitting section. The reflector controls the light diffused by the diffusion cover.

Light-emitting unit and luminaire

According to one embodiment, a lamp apparatus includes a light-emitting module, housing, and a lighting circuit. The light-emitting module includes a light-emitting element. The housing opens in the direction of irradiation of a light beam and having a cap on a side opposite from the direction of irradiation of the light beam. The cap is provided with a light-emitting module mounting portion projecting in the direction of irradiation of the light beam and the light-emitting module is mounted on the light-emitting module mounting portion. The lighting circuit is accommodated in the housing.

Luminaire and lamp apparatus housing

According to one embodiment, in a constricted part of a globe, one end is set to a minimum diameter, the other end is set to a maximum diameter, and a diameter thereof increases from the one end side to the other end side. The constricted part of the globe is concaved into the inside of an imaginary straight line connecting an outer edge of the one end and an outer edge of the other end when viewed in section. A light source part includes a semiconductor light-emitting element and is contained in the globe so that a light-emitting part is positioned between both the ends of the constricted part of the globe. A cap is positioned on one end side of the globe.

Bulb-type lamp and luminaire

According to one embodiment, a floodlight includes at least one light-emitting part, a thermal radiator, a reflector, and an adapter part attachable to and detachable from the thermal radiator. The light-emitting part includes an LED element. The thermal radiator is thermally connected to the light-emitting part. The reflector is provided on the thermal radiator, and controls luminous intensity distribution from the light-emitting part. The adapter part includes an extension reflector. The extension reflector is continuous with the reflector in a state where the adapter part is attached to the thermal radiator and, together with the reflector, controls the luminous intensity distribution from the light-emitting part to provide a luminous intensity distribution angle narrower than the reflector.

Luminaire

According to an embodiment, a luminaire includes a thermal radiation member, and a light source unit provided on a front side of the thermal radiation member. The thermal radiation member has plural support walls provided on a rear surface radially about a substantially central portion of the rear surface toward an outer periphery, and plural thermal radiation fins provided on the rear surface, being away from each other and substantially parallel to each other toward the outer periphery from neighboring wall surface sides of the plural support walls. The light source unit includes a light-emitting element.

A spotlight is provided with a substrate having LEDs disposed thereon and a main body casing on which the substrate is provided. The main body casing has a rear side portion having thermal conductivity, which is thermally coupled to the substrate, and is capable of changing the irradiation angle of light emitted from the LEDs. A plurality of heat-radiating fins for forming grooves operating as a plurality of convection paths along the direction of changing the irradiation angle are provided on the rear side portion of the main body casing.

Lighting system

An object of the invention is to provide a photocatalyst material having a higher catalyst effect than conventional photocatalyst materials. The photocatalyst material of the invention contains, as its major component, a tungsten oxide powder excited by a light source which emits light having a wavelength of 430 to 500 nm, the photocatalyst material having a decomposition ability of 50% or more wherein the decomposition ability is given by the following equation based on the following test: [Test for decomposition ability]: 1 g of a tungsten oxide powder and 20 ppm of acetaldehyde (amount A) are poured into a 3-liter glass container, and acetaldehyde (amount B) is measured after light having a peak wavelength of 460 nm&#xb1;10 nm is irradiated to the mixture for 2 hours to measure the decomposition ability (%): Decomposition ability (%)=[(acetaldehyde amount A&#x2212;acetaldehyde amount B)/acetaldehyde amount A]&#xd7;100.

Photocatalyst material, photocatalyst composition using the same and photocatalyst product

Light emitting diode lamp

Growing community of inventors

Yokosuka, Japan

Ryotaro Matsuda