公开(公告)号：US20200091121A1

公开(公告)日：2020-03-19

申请号：US16690040

申请日：2019-11-20

Applicant: NICHIA CORPORATION

Inventor： Atsushi YAMAMOTO ,  Keiko ONO ,  Saiki YAMAMOTO ,  Tomokazu MARUYAMA ,  Takeshi MORIKAWA ,  Seitaro AKAGAWA

IPC: H01L25/075 ,  H01L33/62 ,  H01L33/50

Abstract: The light-emitting device includes a first light-emitting element having an emission peak wavelength of 430 nm or more and less than 490 nm, a second light-emitting element having an emission peak wavelength of 490 nm or more and 570 nm or less, a support body at which the first light-emitting element and the second light-emitting element are disposed, and a light-transmissive member containing a red phosphor and covering the first light-emitting element and the second light-emitting element. A content density of the red phosphor in the light-transmissive member in a space between the first and second light-emitting elements is higher in a part below an upper surface of the second light-emitting element than in a part above the upper surface thereof.

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：US20210096374A1

公开(公告)日：2021-04-01

申请号：US16988753

申请日：2020-08-10

Applicant: Sharp Kabushiki Kaisha ,  Nichia Corporation

Inventor： Tokumi HAYASHI ,  Kenichi HATSUDA ,  Seitaro AKAGAWA ,  Takeshi MORIKAWA

IPC: G02B27/01 ,  G02F1/13357

Abstract: A head-mounted display to be mounted on a head of the user includes a display panel to display an image, a lighting device to supply light to the display device, the lighting device including at least one light source including a blue light emitting element emitting blue light, and a red phosphor to emit red light when excited by the blue light from the blue light emitting element, the red phosphor including a complex fluoride red phosphor and a nitride red phosphor having a content ratio smaller than that of the complex fluoride red phosphor, a lighting controller to control driving of the light source in synchronization with the image display by the display device so that a one-frame display period in the display device includes a turn-on period and a turn-off period, and a lens.

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.