公开(公告)号：US20180024006A1

公开(公告)日：2018-01-25

申请号：US15655960

申请日：2017-07-21

Applicant: NICHIA CORPORATION

Inventor： Seitaro AKAGAWA ,  Toshiyuki HASHIMOTO ,  Kentaro NISHIGAKI

IPC: G01J3/50 ,  B07C5/342 ,  H01L27/15

CPC classification number: G01J3/505 ,  B07C5/342 ,  G01J3/506 ,  H01L25/0753 ,  H01L27/15 ,  H01L33/502

Abstract: A method of determining a chromaticity rank of a light emitting device includes selecting the light emitting device having a chromaticity rank in a region surrounded by four defining points on a 1931 CIE Chromaticity Diagram. A ratio of a distance in a y-direction between, of the four defining points, two defining points furthest from each other in the y-direction to a distance in an x-direction between, of the four defining points, two defining points furthest from each other in the x-direction is 0.5 or less A peak light emission wavelength of the blue light emitting element is in a range of 447 to 452 nm, a peak light emission wavelength of the green light emitting element is in a range of 520 to 541 nm, and a peak light emission wavelength of the red light emitting element is in a range of 630 to 632 nm.

公开(公告)号：US20210233956A1

公开(公告)日：2021-07-29

申请号：US17301761

申请日：2021-04-13

Applicant: NICHIA CORPORATION

Inventor： Seitaro AKAGAWA ,  Takeshi MORIKAWA ,  Kentaro NISHIGAKI

IPC: H01L27/15 ,  F21V8/00 ,  H01L33/48 ,  H01L33/50

Abstract: A light emitting device includes at least three light emitting elements arranged side by side, and one or more light transmissive members each containing a phosphor and covering the light emitting elements. The at least three light emitting elements include two outer light emitting elements arranged on outer sides, and an inner light emitting element arranged between the two outer light emitting elements and having a different peak emission wavelength than a peak emission wavelength of the two outer light emitting elements. The phosphor has a longer peak emission wavelength than the peak emission wavelengths of the outer light emitting elements and the peak emission wavelength of the inner light emitting element. The two outer light emitting elements and the inner light emitting element are connected in series.

公开(公告)号：US20170229512A1

公开(公告)日：2017-08-10

申请号：US15426645

申请日：2017-02-07

Applicant: NICHIA CORPORATION

Inventor： Seitaro AKAGAWA ,  Takeshi MORIKAWA ,  Kentaro NISHIGAKI

IPC: H01L27/15 ,  H01L33/50 ,  H01L33/48 ,  F21V8/00

CPC classification number: H01L27/156 ,  G02B6/0073 ,  H01L25/0753 ,  H01L33/20 ,  H01L33/486 ,  H01L33/502 ,  H01L33/507 ,  H01L2224/16245 ,  H01L2224/48137 ,  H01L2224/48247 ,  H01L2924/181 ,  H01L2924/00012

Abstract: A light emitting device includes at least three light emitting elements arranged side by side, and one or more light transmissive members each containing a phosphor and covering the light emitting elements. The at least three light emitting elements include two outer light emitting elements arranged on outer sides, and an inner light emitting element arranged between the two outer light emitting elements and having a different peak emission wavelength than a peak emission wavelength of the two outer light emitting elements. The phosphor has a longer peak emission wavelength than the peak emission wavelengths of the outer light emitting elements and the peak emission wavelength of the inner light emitting element. The two outer light emitting elements and the inner light emitting element are connected in series.

公开(公告)号：US20170205565A1

公开(公告)日：2017-07-20

申请号：US15407377

申请日：2017-01-17

Applicant: NICHIA CORPORATION

Inventor： Seitaro AKAGAWA ,  Takeshi MORIKAWA ,  Yusaku ACHI ,  Kentaro NISHIGAKI

IPC: F21V8/00 ,  H01L33/50 ,  H01L25/10 ,  H01L27/15

CPC classification number: G02B6/0073 ,  G02B6/0068 ,  G02B6/0083 ,  H01L25/0753 ,  H01L25/105 ,  H01L27/156 ,  H01L33/50 ,  H01L2224/16245 ,  H01L2224/48137

Abstract: A light-emitting device includes: one or more first light-emitting elements each having a peak wavelength in a range from 430 nm to less than 490 nm; a second light-emitting element having a peak wavelength Y in a range from 490 nm to less than a wavelength X; a third light-emitting element having a peak wavelength Z in a range from more than the wavelength X to 570 nm; and a phosphor or a fourth light-emitting element having a peak wavelength in a range from 580 nm to 680 nm. At least one of the second and third light-emitting elements is connected to at least one of the first light-emitting elements in series. The wavelength X is in a range from more than 490 nm to less than 570 nm with an absolute value of difference between |X−Y| and |X−Z| being 10 nm or less.