公开(公告)号：US20200324342A1

公开(公告)日：2020-10-15

申请号：US16845807

申请日：2020-04-10

Applicant: NICHIA CORPORATION

Inventor： Masaki KONDO ,  Shozo TAKETOMI ,  Hirofumi OGURI

IPC: B22F7/00 ,  B22F1/00

Abstract: A method for producing a rare earth aluminate sintered body includes: preparing a molded body by mixing a fluorescent material having a composition of a rare earth aluminate and a raw material mixture comprising an oxide containing at least one rare earth element Ln selected from the group consisting of Y, La, Lu, Gd, and Tb, an oxide containing Ce, an oxide containing Al, and optionally an oxide containing at least one element M1 selected from the group consisting of Ga and Sc; and calcining the molded body to obtain a sintered body.

公开(公告)号：US20240158694A1

公开(公告)日：2024-05-16

申请号：US18420283

申请日：2024-01-23

Applicant: NICHIA CORPORATION

Inventor： Masaki KONDO ,  Shozo TAKETOMI ,  Hirofumi OGURI

IPC: C09K11/77 ,  B22F1/142 ,  B22F7/00 ,  C01F17/34 ,  C04B35/117 ,  C04B35/44 ,  C04B35/64 ,  C09K11/02 ,  G03B21/20 ,  H01L33/50

CPC classification number: C09K11/7774 ,  B22F1/142 ,  B22F7/008 ,  C01F17/34 ,  C04B35/117 ,  C04B35/44 ,  C04B35/64 ,  C09K11/02 ,  G03B21/204 ,  H01L33/502 ,  B22F2302/25 ,  C09K11/0838

Abstract: A method for producing a rare earth aluminate sintered body includes: preparing a molded body by mixing a fluorescent material having a composition of a rare earth aluminate and a raw material mixture comprising an oxide containing at least one rare earth element Ln selected from the group consisting of Y, La, Lu, Gd, and Tb, an oxide containing Ce, an oxide containing Al, and optionally an oxide containing at least one element M′ selected from the group consisting of Ga and Sc; and calcining the molded body to obtain a sintered body.

公开(公告)号：US20210013383A1

公开(公告)日：2021-01-14

申请号：US17028496

申请日：2020-09-22

Applicant: NICHIA CORPORATION

Inventor： Kazushige FUJIO ,  Masaki KONDO

IPC: H01L33/50 ,  H01L33/32 ,  H01L33/56 ,  H01L33/62 ,  H01L33/48 ,  C09K11/77

Abstract: A light-emitting device is provided. The light-emitting device includes a light-emitting element having a peak light-emitting wavelength in the range of 440 nm to 470 nm, and a fluorescent member. The fluorescent member includes a first fluorescent material having a peak light-emitting wavelength in the range of 480 nm to less than 520 nm, a second fluorescent material having a peak light-emitting wavelength in the range of 520 nm to less than 600 nm, and a third fluorescent material having a peak light-emitting wavelength in the range of 600 nm to 670 nm. The light-emitting device has a ratio of an effective radiant intensity for melatonin secretion suppression to an effective radiant intensity for blue-light retinal damage of 1.53 to 1.70 when the light-emitting device emits light with a correlated color temperature of 2700 K to less than 3500 K; 1.40 to 1.70 when the light-emitting device emits light with a correlated color temperature of 3500 K to less than 4500 K; 1.40 to 1.70 when the light-emitting device emits light with a correlated color temperature of 4500 K to less than 5700 K; and 1.35 to 1.65 when the light-emitting device emits light with a correlated color temperature of 5700 K to 7200 K.

公开(公告)号：US20170250321A1

公开(公告)日：2017-08-31

申请号：US15440719

申请日：2017-02-23

Applicant: NICHIA CORPORATION

Inventor： Kazushige FUJIO ,  Masaki KONDO

IPC: H01L33/50 ,  C09K11/77 ,  C09K11/02

CPC classification number: H01L33/502 ,  C09K11/025 ,  C09K11/7734 ,  H01L33/501 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  H01L2924/181 ,  H01L2924/00014 ,  H01L2924/00012

Abstract: A method for producing a fluorescent material is provided. The method includes preparing fluorescent material particles that contain an alkaline earth metal aluminate having a composition represented by (Sr1−x,Eux)4Al14O25, where x satisfies 0.05≦x≦0.4, and a part of Sr may be substituted by at least one element selected from the group consisting of Mg, Ca, Ba, and Zn; causing the prepared fluorescent material particles to come into contact with a liquid medium containing water; removing at least a portion of the contacted liquid medium to obtain purified fluorescent material particles; causing a phosphate compound to adhere to surfaces of the purified fluorescent material particles to obtain fluorescent material particles to which the phosphate compound is adhered; and heat treating the fluorescent material particles to which the phosphate compound is adhered at 500° C. to 700° C.

公开(公告)号：US20200181487A1

公开(公告)日：2020-06-11

申请号：US16704477

申请日：2019-12-05

Applicant: NICHIA CORPORATION

Inventor： Masaki KONDO ,  Shozo TAKETOMI ,  Takafumi SUMIE ,  Seigo SUNAGAWA ,  Hirofumi Ooguri

IPC: C09K11/77 ,  C01F17/34 ,  G03B21/20

Abstract: A ceramic complex that has improved optical characteristics including luminous efficiency is provided. A method for producing a ceramic complex, including: preparing a molded body containing rare earth aluminum garnet fluorescent material, aluminum oxide, and lutetium oxide, and having a content of the rare earth aluminum garnet fluorescent material in a range of 15% by mass or more and 50% by mass or less, and a content of the lutetium oxide in a range of 0.2% by mass or more and 4.5% by mass or less, based on the total amount of the rare earth aluminum garnet fluorescent material, the aluminum oxide, and the lutetium oxide; and calcining the molded body in an air atmosphere to provide a ceramic complex having a relative density in a range of 90% or more and less than 100%.

公开(公告)号：US20190389763A1

公开(公告)日：2019-12-26

申请号：US16444504

申请日：2019-06-18

Applicant: NICHIA CORPORATION

Inventor： Masaki KONDO ,  Yasuaki MASHIMA

IPC: C03C3/32 ,  C03C14/00 ,  C03C12/00 ,  H01L33/50 ,  C09K11/77

Abstract: Provided is a ceramic complex having high luminous characteristics. Proposed is a ceramic complex including a rare earth aluminate fluorescent material, glass, and calcium fluoride, wherein, when the total amount of the rare earth aluminate fluorescent material, the glass, and the calcium fluoride is taken as 100% by volume, the content of the rare earth aluminate fluorescent material is in a range of 15% by volume or more and 60% by volume or less, the content of the glass is in a range of 3% by volume or more and 84% by volume or less, and the content of the calcium fluoride is in a range of 1% by volume or more and 60% by volume of less.

公开(公告)号：US20190097098A1

公开(公告)日：2019-03-28

申请号：US16142586

申请日：2018-09-26

Applicant: NICHIA CORPORATION

Inventor： Kazushige FUJIO ,  Masaki KONDO

IPC: H01L33/50 ,  H01L33/56 ,  H01L33/32

CPC classification number: H01L33/504 ,  C09K11/7734 ,  C09K11/7774 ,  H01L33/32 ,  H01L33/486 ,  H01L33/507 ,  H01L33/56 ,  H01L33/62

Abstract: A light-emitting device is provided. The light-emitting device includes a light-emitting element having a peak light-emitting wavelength in the range of 440 nm to 470 nm, and a fluorescent member. The fluorescent member includes a first fluorescent material having a peak light-emitting wavelength in the range of 480 nm to less than 520 nm, a second fluorescent material having a peak light-emitting wavelength in the range of 520 nm to less than 600 nm, and a third fluorescent material having a peak light-emitting wavelength in the range of 600 nm to 670 nm. The light-emitting device has a ratio of an effective radiant intensity for melatonin secretion suppression to an effective radiant intensity for blue-light retinal damage of 1.53 to 1.70 when the light-emitting device emits light with a correlated color temperature of 2700 K to less than 3500 K; 1.40 to 1.70 when the light-emitting device emits light with a correlated color temperature of 3500 K to less than 4500 K; 1.40 to 1.70 when the light-emitting device emits light with a correlated color temperature of 4500 K to less than 5700 K; and 1.35 to 1.65 when the light-emitting device emits light with a correlated color temperature of 5700 K to 7200 K.