公开(公告)号：US20230193126A1

公开(公告)日：2023-06-22

申请号：US18112666

申请日：2023-02-22

Applicant: CITIZEN ELECTRONICS CO., LTD. ,  NICHIA CORPORATION

Inventor： Byungchul HONG ,  Naoki SAKO ,  Naoto KIJIMA ,  Masahiko YOSHINO ,  Takashi HASE ,  Fumiko YOYASU ,  Kentarou HORIBE

IPC: C09K11/77 ,  C09K11/61 ,  F21V8/00 ,  G02F1/13357 ,  H01L33/50 ,  F21K2/00 ,  H05B33/14 ,  C09K11/08 ,  C09K11/67

CPC classification number: C09K11/7739 ,  C09K11/616 ,  G02B6/0023 ,  G02F1/1336 ,  H01L33/504 ,  C09K11/77342 ,  C09K11/77347 ,  C09K11/77348 ,  F21K2/00 ,  H05B33/14 ,  C09K11/0883 ,  C09K11/675 ,  C09K11/7734 ,  H01L33/502 ,  G02B6/0038 ,  G02B6/0043 ,  G02B6/0053 ,  G02F1/133603 ,  G02F1/133609 ,  G02F1/133611 ,  G02F1/133615 ,  H01L2924/12042 ,  H01L2924/12044 ,  H01L2924/12041 ,  H01L2924/181 ,  H01L2924/3025 ,  H01L24/45

Abstract: To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100° C. to the emission intensity at 25° C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.

公开(公告)号：US20240376380A1

公开(公告)日：2024-11-14

申请号：US18783735

申请日：2024-07-25

Applicant: CITIZEN ELECTRONICS CO., LTD. ,  NICHIA CORPORATION

Inventor： Byungchul HONG ,  Naoki SAKO ,  Naoto KIJIMA ,  Masahiko YOSHINO ,  Takashi HASE ,  Fumiko YOYASU ,  Kentarou HORIBE

IPC: C09K11/77 ,  C09K11/08 ,  C09K11/61 ,  C09K11/67 ,  F21K2/00 ,  F21V3/06 ,  F21Y115/10 ,  G02F1/1335 ,  G02F1/13357 ,  G02F1/1368 ,  H01L23/00 ,  H01L33/50 ,  H05B33/14

Abstract: To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100° C. to the emission intensity at 25° C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.

公开(公告)号：US20220403231A1

公开(公告)日：2022-12-22

申请号：US17807851

申请日：2022-06-20

Applicant: NICHIA CORPORATION

Inventor： Yuki SHIOTA ,  Keisho YAMASHITA ,  Shoji HOSOKAWA ,  Tomokazu YOSHIDA ,  Yohei YAMAUCHI ,  Naoto KIJIMA

IPC: C09K11/02 ,  C09K11/61 ,  C09K11/06 ,  H01L51/00 ,  F21V9/30 ,  F21V8/00 ,  B32B27/36 ,  B32B27/30 ,  B32B27/08 ,  B32B3/12

Abstract: A wavelength conversion member including a wavelength conversion layer containing a fluoride phosphor, quantum dots, a surfactant, and a resin. The fluoride phosphor contains fluoride particles having a specific composition and having particle size values within specific ranges. The quantum dots include at least one selected from a first crystalline nanoparticle and a second crystalline nanoparticle. The first crystalline nanoparticle has a specific composition. When irradiated with light having a wavelength of 450 nm, the first crystalline nanoparticle emits light having an emission peak at a wavelength in a range from 510 nm to 535 nm, and a full width at half maximum of the emission peak of the first crystalline nanoparticle is in a range from 10 nm to 30 nm. The second crystalline nanoparticle includes a chalcopyrite-type crystalline structure, and a full width at half maximum of the emission peak of the second crystalline nanoparticle is 45 nm or less.

公开(公告)号：US20240101899A1

公开(公告)日：2024-03-28

申请号：US18524247

申请日：2023-11-30

Applicant: CITIZEN ELECTRONICS CO., LTD. ,  NICHIA CORPORATION

Inventor： Byungchul HONG ,  Naoki SAKO ,  Naoto KIJIMA ,  Masahiko YOSHINO ,  Takashi HASE ,  Fumiko YOYASU ,  Kentarou HORIBE

IPC: C09K11/77 ,  C09K11/08 ,  C09K11/61 ,  C09K11/67 ,  F21K2/00 ,  F21V8/00 ,  G02F1/13357 ,  H01L33/50 ,  H05B33/14

CPC classification number: C09K11/7739 ,  C09K11/0883 ,  C09K11/616 ,  C09K11/675 ,  C09K11/7734 ,  C09K11/77342 ,  C09K11/77347 ,  C09K11/77348 ,  F21K2/00 ,  G02B6/0023 ,  G02F1/1336 ,  H01L33/502 ,  H01L33/504 ,  H05B33/14 ,  G02B6/0038 ,  G02B6/0043 ,  G02B6/0053 ,  G02F1/133603 ,  G02F1/133609 ,  G02F1/133611 ,  G02F1/133615 ,  H01L24/45 ,  H01L2924/12041 ,  H01L2924/12042 ,  H01L2924/12044 ,  H01L2924/181 ,  H01L2924/3025

Abstract: To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100° C. to the emission intensity at 25° C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.