Sharp Kabushiki Kaisha Corporation

National Institute for Materials Science

Kazunori Annen

Makoto Izumi

Koji Takahashi

Yoshiyuki Takahira

Yoshinobu Kawaguchi

Hiroshi Fukunaga

Yosuke Maemura

Kenichi Yoshimura

Masamichi Harada

Tomohiro Sakaue

Naoto Hirosaki

Noboru Iwata

Yoshitaka Tomomura

Toshiki Matsuoka

Yuuichi Kanbayashi

Tatsuya Ryowa

Tetsuo Uchikoshi

Takatoshi Morita

Kimiko Mieda

Hiroyo Segawa

Masato Ohno

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

A light emitting device of the present disclosure includes a light emitting section that generates fluorescence by receiving laser light, a reflection film that reflects laser light which is radiated to the vicinity of the light emitting section, among laser light which is emitted toward the light emitting section from a rod lens, and a reflection mirror that collects the laser light reflected by the reflection film, in the light emitting section.

Light emitting device

A wavelength converting member includes silica glass and a plurality of fluorescent material particles including an oxynitride or nitride fluorescent material and dispersed in the silica glass. The plurality of fluorescent material particles include at least two kinds of fluorescent material particles including (i) first fluorescent material particles that emit a fluorescence having a first peak wavelength and (ii) second fluorescent material particles that emit a fluorescence having a second peak wavelength. The wavelength converting member has a density within a range from 0.8 g/cmto 1.2 g/cm.

Wavelength converting member, light-emitting device, and method for producing wavelength converting member

A fluorescent material-sealed sheet includes a plurality of fluorescent sections, an upper sealing section, and a lower sealing section, the plurality of fluorescent sections being sealed by the upper sealing section and the lower sealing section.

Light source, light-emitting device, light source for backlight, display device, and method for producing light source

A phosphor includes semiconductor nanoparticles formed of compound semiconductor, and conductive transparent compounds. The semiconductor nanoparticles may be dispersed in or on the conductive transparent compounds. The resistivity of the conductive transparent compounds is preferably less than or equal to 10 &#x3a9;cm.

Phosphor

A light emitting apparatus includes a light emitting device emitting primary light and a wavelength conversion unit absorbing a part of the primary light to emit secondary light. The wavelength conversion unit includes a first wavelength conversion unit containing at least a nanocrystalline phosphor and a second wavelength conversion unit containing a rare-earth-activated phosphor or a transition-metal-element-activated phosphor. In the light emitting device, the first wavelength conversion unit and the second wavelength conversion unit are closely stacked in order.

Light emitting apparatus and method for manufacturing thereof

A light emitting device includes a light emitting element that emits primary light and a wavelength conversion unit that absorbs part of the primary light and emits secondary light. In the light emitting device, the wavelength conversion unit includes a plurality of types of phosphors that emit secondary light having wavelengths different from each other, and at least one of the phosphors is a covered phosphor covered with a surface film that reflects secondary light emitted from a phosphor other than the covered phosphor.

Growing community of inventors

Osaka, Japan

Kazunori Annen