Sharp Kabushiki Kaisha Corporation

Ge Phosphors Technology, LLC

Denki Kagaku Kogyo Kabushiki Kaisha

Masatsugu Masuda

Kenji Terashima

Masaaki Katoh

Tsukasa Inoguchi

Tetsuya Hanamoto

Atsushi Yamashita

Kenichi Yoshimura

Toyonori Uemura

Masanobu Okano

Masayuki Ohta

Toshiyuki Tanaka

Masahiro Konishi

Hiroaki Onuma

Masamichi Harada

Hitoshi Matsushita

Takehiro Shiomoto

Masataka Miyata

Takeshi Kawahara

Makoto Yoshimura

Hiroki Orita

Masanao Kiba

Hideaki Fujii

Toshio Hata

Katsuji Iguchi

Hideyuki Emoto

Hiroshi Fukunaga

Kohsei Takahashi

Hiroya Sato

Jun Mori

Masaharu Kitano

Masatoshi Omoto

Hironori Nagasaki

Masataka Andou

A liquid crystal display device includes: a liquid crystal display panel that includes red color filters, green color filters, and blue color filters; and an illumination device that illuminates the liquid crystal display panel with white light. The illumination device includes light-emitting elements that emit blue light, a green phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits green light, and a red phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits red light. The blue color filters are made of a colored material that contains a dye, and the chromaticity values x and y of the white light emitted from the illumination device satisfy the relationships 0.24&#x3c;x and 0.24&#x3c;y.

Liquid crystal display apparatus

Light irradiation that is suitable for treatment for a relatively small diseased part and is performed almost uniformly and efficiently for the entirety of an affected part even when the affected part is not flat is realized. Light output from a plurality of LED chips includes first wavelength region light whose light-emission intensity peak is in a wavelength range of 380 nm or more and 430 nm or less and second wavelength region light whose light-emission intensity peak is in a wavelength range of more than 430 nm and 635 nm or less, and a group of LED light sources has uniform in-plane intensity of light irradiation.

Light irradiating device and phototherapy machine

A light emitting device which emits a secondary light with high color purity and has a fast response speed is obtained. A KSF phosphor () which absorbs a part of blue light and emits red light and a CASN phosphor () are distributed in a resin () which seals an LED chip () which emits the blue light. The KSF phosphor () absorbs the blue light and emits the red light by forbidden transition, and the CASN phosphor () absorbs the blue light and emits the red light by allowed transition.

Light emitting device that emits secondary light with a fast response

There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): EuSiAlON, a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MIEuSiAlONor a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MIIEu)MIIISiN, having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency.

Phosphor, method of producing the same, and light emitting apparatus

A light-emitting device () includes a substrate (); a wiring pattern (), an electrode land (), a sealing resin layer (), a wire (), and a resin dam () that are disposed on the substrate (); at least one light-emitting element () that emits light having a peak emission wavelength in a wavelength range of 430 to 480 nm; a green phosphor () that is excited by primary light emitted from the light-emitting element () to emit light having a peak emission wavelength in a green region; and a first red phosphor () that is excited by the primary light to emit light having a peak emission wavelength in a red region. The first red phosphor () emits no light in a wavelength range of 700 nm or more and absorbs no light in a wavelength range of 550 to 600 nm.

Light-emitting device

A light-emitting device includes a light-emitting element for emitting primary light, and a wavelength conversion unit for absorbing part of the primary light and emitting secondary light having a wavelength longer than that of the primary light, wherein the wavelength conversion unit includes plural kinds of phosphors having light absorption characteristics different from each other, and then at least one kind of phosphor among the plural kinds of phosphors has an absorption characteristic that can absorb the secondary light emitted from at least another kind of phosphor among the plural kinds of phosphors.

Light emitting device and fabricating method thereof

Light emitting device and illumination device

This light emitting device is provided with: a light emitting element which emits excitation light; and a far-red phosphor which is excited by the light of the light emitting element and emits light that has a peak wavelength within the range of 700-800 nm. The far-red phosphor has a median diameter within the range of 1-20 &#x3bc;m.

Light emitting device

A phosphor as a divalent europium-activated oxynitride green light emitting phosphor which is a &#x3b2;-type SiAlON substantially represented by a general formula (A): EuSiAlON(where a, b, c, d, and e are numbers satisfying 0.005&#x2266;a&#x2266;0.4, b+c=12, and d+e=16), and having an average particle size (d1) (determined by an air permeability method) of 9 to 16 &#x3bc;m, a median diameter (50% D) in particle size distribution of 12.5 to 35 &#x3bc;m, 50% D/d1 of 1.4 to 2.2, and an absorptance at 600 nm of not more than 8.0%, and a light emitting apparatus, a BL light source apparatus, and a liquid crystal display device using the same are provided, to provide a light emitting apparatus with a high efficiency and a stable characteristic and a liquid crystal display apparatus using the same by using the &#x3b2;-type SiAlON having controlled dispersibility and improved transparency.

Phosphor, light emitting apparatus, and liquid crystal display apparatus using the same

Disclosed is a light-emitting device () including a light-emitting element () emitting primary light, and a light converter () absorbing a part of the primary light emitted from the light-emitting element () and emitting secondary light having a longer wavelength than the primary light. The light converter () contains a green light-emitting phosphor () and a red light-emitting phosphor (). The green light-emitting phosphor () is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuSiAlONand a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(BaMIEu)O.SiO, while the red light-emitting phosphor () is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII(MIIIMn)Fand/or MIV(MIIIMn)F. Consequently, the light-emitting device () has excellent color gamut (NTSC ratio).

Growing community of inventors

Osaka, Japan

Masatsugu Masuda