Sharp Kabushiki Kaisha Corporation

Yosuke Maemura

Koji Takahashi

Yoshiyuki Takahira

Tomohiro Sakaue

Hiroshi Kijima

Kensei Toyota

Yasuo Fukai

Yoshinobu Kawaguchi

Kazunori Annen

Yoshitaka Tomomura

Kei Yamamoto

Takatoshi Morita

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 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

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

An illumination devicewhich is a light emitting device capable of emitting white light, includes: a laser elementfor emitting a blue laser beam; a light emitting sectionfor generating fluorescence by be being irradiated with the blue laser beam emitted from the laser element; and a parabolic mirrorfor reflecting the fluorescence generated from the light emitting section, the parabolic mirrorbeing disposed on an irradiated surface side which irradiated surface is a surface of the light emitting sectionwhich surface is irradiated with the blue laser beam. This allows the illumination deviceto efficiently project the white illumination light.

Light emitting device, illumination device, and vehicle headlamp

A light-projecting device according to the present invention includes a plurality of light source units including (i) a light emitting section that emits light upon receiving a laser beam and (ii) a reflector. Each of the light source units project light to a corresponding one of light-projected spots which is a region to which light is projected in an illuminated region in a partitioning manner, and the illuminated region is formed by combining a plurality of the light-projected spot.

Light projecting device and vehicular headlamp

A light-emitting device includes a plurality of laser elements, a light-emitting section for emitting light in response to a laser beam, and an emission control section for controlling whether each of the plurality of laser elements emits light or not. At least a part of the plurality of laser elements is positioned in such a manner that irradiation regions of the light-emitting section are positioned at least partially differently.

Light-emitting device and vehicle headlight

A headlamp includes the laser chip which emits excitation light, a light-emitting section which contains a phosphor, and an optical rod. The excitation light emitted from the laser chip is optically guided by the optical rod, and the light output from the optical rod enters the light-emitting section. An edge is present in the light intensity distribution of the light-emitting section.

Growing community of inventors

Osaka, Japan

Yosuke Maemura