Sharp Kabushiki Kaisha Corporation

Hitachi Maxell, Limited

Yoshiyuki Takahira

Koji Takahashi

Yosuke Maemura

Tomohiro Sakaue

Hiroshi Kijima

Kensei Toyota

Yasuo Fukai

David James Montgomery

James Rowland Suckling

Takeshi Matsuura

Akira Morioka

Shigetoshi Ito

Yoshinobu Kawaguchi

Kazunori Annen

Norikatsu Koide

Yoshitaka Tomomura

Kei Yamamoto

Yoshiharu Katsuta

Takatoshi Morita

Yuki Sakamoto

Kouzaburo Sato

Yasuo Yamasaki

James Suckling

A headlamp includes a light-emitting section which emits fluorescence upon receiving excitation light from a laser element. Energy intensity distribution of the excitation light, which is received by the light-emitting section, is a top-hat distribution.

Light-emitting device, illumination device, and vehicle headlamp

A light emitting device of the present invention includes a light-emitting section for generating fluorescence by receiving a laser beam, and a light irradiation unit for irradiating a light irradiated surface of the light emitting section with a laser beam that increases regularly in beam diameter in a direction in which the laser beam travels.

Light emitting device, vehicle headlamp, illumination device, and laser element

A light emission body capable of simultaneously improving spot feature and color unevenness of illumination light is provided. A light emission body () according to one embodiment of the present invention includes a fluorescent substance layer () having a light irradiation surface () irradiated with laser light (L) and a light emitting surface () emitting the laser light (L) and fluorescence (L), a light absorption layer () that blocks the laser light (L) and the fluorescence (L) emitted from the light emitting surface (), and a scattering layer () that scatters the laser light (L) and the fluorescence (L) which are not blocked by the light absorption layer ().

Light emission body and illumination device

A wavelength conversion member that includes a single crystal phosphor and has a high yield rate is provided. A light emitting unit () is a wavelength conversion member that converts a wavelength of a laser light output from a laser light source and includes a phosphor layer () formed of a single crystal phosphor. A plane orientation of a principal plane (), which has an area larger than those of divided planes, of the phosphor layer is {111}, and a plane orientation of some divided planes out of the plurality of divided planes is {1-10}.

Wavelength conversion member and light emitting device

In a light emitting section, a phosphor layer including a first phosphor particle which receives excitation light and emits fluorescence with a first peak wavelength and a phosphor layer including a second phosphor particle which receives the excitation light and emits fluorescence with a second peak wavelength are stacked. In the light emitting section, when an upper surface is a surface from which illumination light is mostly emitted, the illumination light including the fluorescence emitted from the first phosphor particle and the fluorescence emitted from the second phosphor particle, a reflective member to reduce leakage of fluorescence is provided on a side surface of the light emitting section.

Light source device and illumination apparatus

A headlamp () includes a light-emitting section () which emits fluorescence upon receiving excitation light from a laser element (). Energy intensity distribution of the excitation light, which is received by the light-emitting section (), is a top-hat distribution.

Light emitting device with optical member for exciting fluorescence, illumination device, and vehicle headlamp having the same

A light-emitting device includes a light-emitting portion that emits fluorescence in response to excitation light incident on a surface of the light-emitting portion, and a reflector that defines a light-emitting region on the surface of the light-emitting portion, the fluorescence being emitted from the light-emitting region. The excitation light has a top-hat energy intensity distribution on the surface of the light-emitting portion.

Light-emitting device

A light-emitting unit according to the present invention includes: a fluorescent section for emitting light upon irradiation with a laser beam; and a wavelength selection filter being provided so as to face the fluorescent section. The wavelength selection filter reflects the laser beam toward the fluorescent section and transmits fluorescence emitted from the fluorescent section.

Light-emitting unit with optical plate reflecting excitation light and transmitting fluorescent light, and light-emitting device, illumination device, and vehicle headlight including the unit

A headlampincludes (i) a laser elementfor emitting a laser beam, (ii) a light emitting section, including a sealing material made from an inorganic material, for emitting fluorescence upon receiving the laser beam emitted from the laser element, and (iii) a heat sinkfor releasing, via a contact surface of the heat sinkwhich contact surface is in contact with the light emitting section, heat generated in the light emitting sectionin response to the laser beam emitted onto the light emitting section, the light emitting sectionexisting within a range which is determined on the basis of the contact surface and with which desired heat releasing efficiency is obtained.

Light emitting device, vehicle headlamp, illumination device, and vehicle

An optical guide member () includes an optical guide section having an exit end surface (Rx) including a side a, and an imaging lens () forms, on a front surface of a light emitting section (), an image of the side a in an image of excitation light (L) on the exit end surface (Rx).

Light emitting device and lighting device

A light-emitting device includes a light-emitting section, a lens, and a movement control section, the movement control section changing an illumination position and a spot size of a laser beam in the light-emitting section by changing a relative position of the lens with respect to the light-emitting section.

Light-emitting device, floodlight, and vehicle headlight

A light projecting device of the present invention includes: a light source unit including (i) a laser element for emitting light, (ii) a light converging lens for converging the light emitted from the laser element, and (iii) a light emitting section for emitting light upon receipt of the light converged by the light converging lens; and a reflector for projecting light emitted from the light source unit. The light source unit is provided so as to be attached to or detached from a fixed part to which the light source unit is to be fixed.

Light projecting device and vehicular headlamp

A headlight system in accordance with the present invention includes: a semiconductor laser element that emits laser light; a light-emitting section that upon receipt of the laser light emitted from the semiconductor laser element, emits illumination light which is both the laser light and fluorescence obtained by wavelength conversion of a portion of the laser light; and a diffusion plate that mixes the laser light and fluorescence which are contained in the illumination light emitted by the light-emitting section.

Growing community of inventors

Osaka, Japan

Yoshiyuki Takahira