Nichia Corporation

Koji Kajikawa

Masato Yoshida

Kazushige Fujio

Atsushi Yamamoto

Takeshi Morikawa

Hirofumi Ooguri

Yuji Sato

Tsunehito Niimi

Yuya Goto

The vehicle light-emitting device includes a light-emitting element having a peak emission wavelength of 400 nm or greater and 510 nm or less, and a fluorescent member including a first phosphor excited by light emitted by the light-emitting element and emitting light having a peak emission wavelength of 480 nm or greater and 530 nm or less a second phosphor excited by the light emitted by the light-emitting element and emitting light having a peak emission wavelength of 540 nm or greater and 600 nm or less. The vehicle light-emitting device emits light in a region AL in a CIE1931 chromaticity diagram as defined in the present disclosure.

Vehicle light-emitting device and vehicle lighting device

A fluorescent material particle including: a particle that contains a thiogallate phosphor and a first adherent member containing boron oxide and being disposed on the surface of the particle, a method for producing the fluorescent material particles, and a light emitting device are provided.

Fluorescent material particles, method for producing the same, and light emitting device

A method for producing a fluorescent material can be provided. The method includes preparing fluorescent material particles that contain a fluoride having a composition including Mn, at least one selected from the group consisting of alkali metal elements and NH, and at least one selected from the group consisting of Group 4 elements and Group 14 elements; causing at least one cation selected from rare-earth elements and a phosphate ion to come into contact with each other in a liquid medium containing the fluorescent material particles to obtain rare-earth phosphate-adhered fluorescent material particles including the fluorescent material particles to which the rare-earth phosphate is adhered; and separating the rare-earth phosphate-adhered fluorescent material particles from the liquid medium.

Fluorescent material, light-emitting device, and method for producing fluorescent material

A fluoride fluorescent material, comprising:

Fluoride fluorescent material and method for producing the same

A method of manufacturing an image display device which is configured to produce high luminance while maintaining color reproductivity and a method of efficiently selecting a combination of a light emitting device and a color filter. A method of manufacturing an image display device includes preparing a light emitting device which has a light source, a green fluorescent material and a red fluorescent material activated with tetravalent manganese ions, and configured to emit light which includes a visible light region, providing a color filter candidate which include red, green, and blue pixels in which the ratio of an integral value of the wavelength range of 560 to 640 nm with respect to the ratio of an integral value of the wavelength range of 460 to 640 nm in a spectral transmittance curve of the green pixel is 23% or greater, providing a color filter configured to satisfy a NTSC ratio of 65% or greater when the color filter candidate and the light emitting device are combined, and constructing an image display device with the use of the color filter, the light emitting device, and a controlling member for optical transmission.

Growing community of inventors

Tokushima, Japan

Koji Kajikawa