公开(公告)号：US20230152666A1

公开(公告)日：2023-05-18

申请号：US17919261

申请日：2021-04-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshihiko SATO ,  Yosuke MIZOKAMI ,  Norishige NANAI

IPC: G02F1/365 ,  G02F1/35

CPC classification number: G02F1/365 ,  G02F1/353

Abstract: A light-emitting system includes an optical fiber, a first light source unit, a second light source unit, and a light-guiding member. The optical fiber includes a wavelength-converting portion containing a wavelength-converting element. The wavelength-converting element may be excited by excitation light to produce a spontaneous emission of light having a longer wavelength than the excitation light and may also be excited by an amplified spontaneous emission of light. The first light source unit makes the excitation light incident on the optical fiber. The second light source unit makes seed light, causing the wavelength-converting element that has been excited by either the excitation light or the amplified spontaneous emission of light to produce a stimulated emission of light, incident on the optical fiber. The light-guiding member guides the light coming from the optical fiber and lets the light emerge therefrom.

公开(公告)号：US20220099863A1

公开(公告)日：2022-03-31

申请号：US17422566

申请日：2020-01-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toru HIRANO ,  Tsuyoshi MORIZUMI ,  Yosuke MIZOKAMI ,  Toshihiko SATO

IPC: G02B1/11

Abstract: A color conversion element includes: a substrate; a fluorescent part which is arranged above the substrate, receives laser light from an outside, and emits light of a color different from a color of the laser light; a first flattening layer which is superposed on a first main surface of the fluorescent part opposite to the substrate; a second flattening layer which is superposed on a second main surface of the fluorescent part facing the substrate; a reflective layer which is superposed on a main surface of the second flattening layer facing the substrate and formed of a dielectric multilayer film; and a joint part which lies between the reflective layer and the substrate and joins together the reflective layer and the substrate.

公开(公告)号：US20230224439A1

公开(公告)日：2023-07-13

申请号：US17919260

申请日：2021-04-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yosuke MIZOKAMI ,  Toshihiko SATO ,  Norishige NANAI

IPC: H04N9/31 ,  G03B21/20

CPC classification number: H04N9/3161 ,  H04N9/3164 ,  G03B21/204

Abstract: A projection system includes a light source unit, a spatial light modulation unit, and a projection optical system. Light source unit includes an optical fiber, a first light source part, and a second light source part. Optical fiber includes a light incident portion, a light emerging portion and a wavelength-converting portion. Wavelength-converting portion is disposed between light incident portion and light emerging portion. Wavelength-converting portion includes wavelength-converting elements. Wavelength-converting elements are able to be excited by excitation light to produce spontaneous emission of light having a longer wavelength than excitation light, and also excited by amplified spontaneous emission of light. First light source part makes excitation light incident on light incident portion. Second light source part makes seed light incident on light incident portion. Seed light causes wavelength-converting elements excited by excitation light or amplified spontaneous emission of light to produce stimulated emission of light.

公开(公告)号：US20230151939A1

公开(公告)日：2023-05-18

申请号：US17919262

申请日：2021-04-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Norishige NANAI ,  Yosuke MIZOKAMI ,  Toshihiko SATO

IPC: F21S11/00 ,  F21V9/30 ,  F21K9/61

CPC classification number: F21S11/007 ,  F21V9/30 ,  F21K9/61 ,  F21Y2115/30

Abstract: In a lighting system an optical fiber includes a light incident portion, a light emerging portion, and a wavelength-converting portion. The wavelength-converting portion is provided between the light incident portion and the light emerging portion. The wavelength-converting portion contains a wavelength-converting element which is excited by excitation light and amplifies a spontaneous emission of light, having a longer wavelength than the excitation light, with an amplified spontaneous emission of light. A first light source unit makes the excitation light incident on the light incident portion. A second light source unit makes seed light, which causes the wavelength-converting element excited by the excitation light and the amplified spontaneous emission of light to produce a stimulated emission of light, incident on the light incident portion. A lighting unit, into an external space, light emerging from the light emerging portion of the optical fiber.

公开(公告)号：US20250068031A1

公开(公告)日：2025-02-27

申请号：US18726807

申请日：2022-12-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yosuke MIZOKAMI ,  Norishige NANAI ,  Toshihiko SATO

IPC: G02F1/35 ,  G02F1/365

Abstract: A first wavelength converting member contains a first wavelength-converting element which produces first spontaneous emissions of light having multiple wavelengths longer than a wavelength of first excitation light. A second wavelength converting member contains a second wavelength-converting element which produces second spontaneous emissions of light having multiple wavelengths longer than a wavelength of a second excitation light. An optical member is interposed between the second wavelength converting member and the first wavelength converting member. A motor rotates the optical member. In the optical member, a plurality of filter portions are arranged along a circumference of a circle centered around a center axis of rotation of the optical member. Each of the multiple wavelength ranges includes a wavelength of at least one of the second spontaneous emissions of light having the multiple wavelengths produced by the second wavelength converting member. The wavelength is at least one of the multiple wavelengths.

公开(公告)号：US20240302004A1

公开(公告)日：2024-09-12

申请号：US18289566

申请日：2022-03-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshihiko SATO ,  Norishige NANAI ,  Yosuke MIZOKAMI

IPC: F21K9/61 ,  F21K9/64 ,  F21K9/69 ,  F21Y115/10

CPC classification number: F21K9/61 ,  F21K9/64 ,  F21K9/69 ,  F21Y2115/10

Abstract: In a lighting system, a wavelength-converting fiber includes a light inlet portion, a light outlet portion, and a wavelength-converting portion containing a wavelength-converting element. The wavelength-converting element may be excited not only by excitation light to produce a spontaneous emission of light having a longer wavelength than the excitation light but also by an amplified spontaneous emission of light. A first light source unit emits the excitation light. A second light source unit emits a seed light ray causing the wavelength-converting element that has been excited by either the excitation light P1 or the amplified spontaneous emission of light to produce a stimulated emission of light. An optical system makes the excitation light coming from the first light source unit and the seed light ray coming from the second light source unit incident on the light inlet portion. The output lens condenses outgoing light coming from the light outlet portion.