公开(公告)号：US20230080194A1

公开(公告)日：2023-03-16

申请号：US17797885

申请日：2021-02-05

Applicant: STANLEY ELECTRIC CO., LTD.

Inventor： Yusuke YOKOBAYASHI ,  Yasuyuki KAWAKAMI ,  Yosuke MAEMURA ,  Hideaki YAMAMOTO ,  Keijiro TAKASHIMA ,  Ryosuke KAMAKURA

IPC: F21V7/30 ,  F21V9/35 ,  F21K9/64 ,  H01S5/0239

Abstract: An optical device includes a metal reflective layer substantially made of a metal material, a first light transmissive layer disposed on the metal reflective layer, an optical multilayer reflective film disposed on the first light transmissive layer and including a plurality of sublayers stacked on each other and having different refractive indexes, and a wavelength converting layer disposed on the optical multilayer reflective film and containing a fluorescent material capable of absorbing incident excitation light and generating fluorescent light having a lower energy. The wavelength converting layer is capable of generating mixed light containing the excitation light and the fluorescent light in response to irradiation with the excitation light.

公开(公告)号：US20240384858A1

公开(公告)日：2024-11-21

申请号：US18685316

申请日：2022-08-25

Applicant: KYOTO UNIVERSITY ,  STANLEY ELECTRIC CO., LTD.

Inventor： Yusuke YOKOBAYASHI ,  Yasuyuki KAWAKAMI ,  Yosuke MAEMURA ,  Shunsuke MURAI

IPC: F21V9/32 ,  F21V9/45 ,  F21Y105/10 ,  F21Y115/30

Abstract: A wavelength conversion device includes a wavelength converter having a plate shape and a plurality of antennas. The wavelength converter converts a wavelength of incident light and generates wavelength-converted light and emits the wavelength-converted light. The plurality of antennas are disposed on a light-emitting surface of the wavelength converter. The plurality of antennas form an antenna array in a first region of the light-emitting surface. The respective plurality of antennas are arranged with a predetermined period in the first region. The antenna array is absent in a second region outside the first region. An optical path length from a light-receiving surface of the wavelength converter to the light-emitting surface of the incident light that reaches a light-emitting surface of the first region is longer than an optical path length from the light-receiving surface to the light-emitting surface of the incident light that reaches a light-emitting surface of the second region.

公开(公告)号：US20200025341A1

公开(公告)日：2020-01-23

申请号：US16510736

申请日：2019-07-12

Applicant: KYOTO UNIVERSITY ,  STANLEY ELECTRIC CO., LTD.

Inventor： Shunsuke MURAI ,  Yusuke YOKOBAYASHI ,  Yasuyuki KAWAKAMI ,  Keijiro TAKASHIMA ,  Syousaku KUBO ,  Yosuke MAEMURA

IPC: F21K9/64 ,  F21K9/65 ,  F21K9/68

Abstract: A wavelength conversion device includes: a wavelength conversion element having a phosphor plate that converts the wavelength of incident light upon a light incident surface to generate wavelength-converted light, and emits the wavelength-converted light from a light emission surface; an antenna array constituted of a plurality of optical antennas that are periodically arranged on the light emission surface of the phosphor plate; and a recessed structure including at least one recessed portion provided in the light emission surface of the phosphor plate.