公开(公告)号：US20230367189A1

公开(公告)日：2023-11-16

申请号：US18299417

申请日：2023-04-12

Applicant: NICHIA CORPORATION

Inventor： Wataru KITAHARA ,  Takanori ARUGA

IPC: G03B21/20 ,  G03B21/28

CPC classification number: G03B21/2013 ,  G03B21/2033 ,  G03B21/28

Abstract: The light source includes first to eighth light sources configured to emit first to eighth lights, respectively. The first light has a first peak wavelength, the second light has a second peak wavelength, the third light has a third peak wavelength, and the fourth light has the second peak wavelength. The fifth light has the third wavelength, the sixth light has the second wavelength, the seventh light has the first wavelength, and the eighth light has the second wavelength. The first and fifth lights pass through a first optical member. The second and sixth lights pass through a second optical member. The third and seventh lights are reflected by the second optical member. The fourth and eighth lights are reflected by the first optical member.

公开(公告)号：US20210372586A1

公开(公告)日：2021-12-02

申请号：US17314242

申请日：2021-05-07

Applicant: NICHIA CORPORATION

Inventor： Wataru KITAHARA

IPC: F21S41/675 ,  F21S41/32 ,  F21V7/08

Abstract: An lighting device 100 includes a light source, a reflector, an actuator, and a controller. The reflector has a first reflection surface that is concave recessed toward a direction away from the light source and is configured to receive light emitted from the light source. The actuator is configured to rotate the reflector with an axis passing through the light source being a rotation axis. The controller is configured to keep the light source on over a time shorter than a rotation period of the reflector according to a rotation angle of the reflector while controlling the actuator to rotate the reflector. A casting direction of light emitted from the first reflection surface is inclined with respect to an extension direction of the rotation axis.

公开(公告)号：US20210199267A1

公开(公告)日：2021-07-01

申请号：US17125614

申请日：2020-12-17

Applicant: NICHIA CORPORATION

Inventor： Hiroyuki ITAHANA ,  Takanori ARUGA ,  Wataru KITAHARA

IPC: F21V7/04 ,  F21V5/04

Abstract: An optical device includes: a light-transmissive member having a first reflective surface configured to reflect, to an arc-shaped first region around a first axis, first light incident along the first axis and having a light distribution characteristic with an optical axis parallel to the first axis; and a reflector having: a second reflective surface and a third reflective surface intersecting each other on the first axis and disposed such that the first reflective surface is located between the second reflective surface and the third reflective surface; and a fourth reflective surface disposed between the second reflective surface and the third reflective surface to reflect the first light to the arc-shaped first region around the first axis.

公开(公告)号：US20250110337A1

公开(公告)日：2025-04-03

申请号：US18978166

申请日：2024-12-12

Applicant: NICHIA CORPORATION

Inventor： Wataru KITAHARA ,  Takanori ARUGA ,  Hajime AKIMOTO

IPC: G02B27/01 ,  H10H29/80 ,  H10H29/856

Abstract: A light source unit includes: a display device configured to emit light that has a substantially Lambertian light distribution and to display a picture; a first prism sheet on which the light emitted from the display device is incident; and an imaging optical system that includes an input element on which light emitted from the first prism sheet is incident and an output element on which light that has passed through the input element is incident, and configured such that light emitted from the output element forms a first image corresponding to the picture. The imaging optical system has a substantially telecentric property on a side of the first image.

公开(公告)号：US20200018460A1

公开(公告)日：2020-01-16

申请号：US16453926

申请日：2019-06-26

Applicant: NICHIA CORPORATION

Inventor： Wataru KITAHARA ,  Yoshinori MOMOSE ,  Wataru OGURA

IPC: F21V7/00 ,  F21V8/00 ,  G02B3/08 ,  F21V7/04

Abstract: An optical device comprises: at least one first reflecting surface disposed so as to reflect first light that has a light distribution having an optical axis parallel to a first axis, to an arc-shaped first region surrounding the first axis; and a second reflecting surface and a third reflecting surface that are disposed such that the second reflecting surface and the third reflecting surface meet each other on the first axis, and such that the first reflecting surface is disposed between the second reflecting surface and the third reflecting surface.

公开(公告)号：US20250102896A1

公开(公告)日：2025-03-27

申请号：US18891773

申请日：2024-09-20

Applicant: Nichia Corporation

Inventor： Tomotoshi TSUJI ,  Wataru KITAHARA ,  Takashi SASAMURO

IPC: G03B21/20

Abstract: A light source device includes a substrate, a laser element on a main surface of the substrate and configured to emit laser light, an optical element on the main surface of the substrate and in an optical path of the laser light, and a polarization element on the optical element. The optical element has a first surface that reflects in a first direction a first component of the laser light incident onto the optical element from the laser element, and a second surface that reflects in the first direction a second component of the laser light incident onto the optical element from the laser element and transmitted through the first surface. The first component of the laser light reflected by the first surface is not transmitted through the polarization element and the second component of the laser light reflected by the second surface is transmitted through the polarization element.

公开(公告)号：US20240210683A1

公开(公告)日：2024-06-27

申请号：US18538112

申请日：2023-12-13

Applicant: NICHIA CORPORATION

Inventor： Takanori ARUGA ,  Wataru KITAHARA ,  Hajime AKIMOTO

IPC: G02B27/01 ,  G02B5/30 ,  G02B27/09

CPC classification number: G02B27/0101 ,  G02B5/3083 ,  G02B27/0977 ,  G02B2027/0112

Abstract: A light source unit includes: a display device configured to emit light having a substantially Lambertian light distribution and to display an image, the display device including a plurality of pixels arranged in a matrix configuration in a same plane, wherein pixels among the plurality of pixels located at an outermost perimeter are arranged so that straight lines connecting centers of the pixels located at the outermost perimeter do not form a rectangle; and an imaging optical system including: an input element on which light emitted from the display device is incident, and an output element on which light traveling via the input element is incident, light emitted from the output element forming a first image corresponding to the image. The imaging optical system is substantially telecentric at a first image side.

公开(公告)号：US20240210680A1

公开(公告)日：2024-06-27

申请号：US18390954

申请日：2023-12-20

Applicant: NICHIA CORPORATION

Inventor： Wataru KITAHARA ,  Naoki NAKAMURA ,  Takanori ARUGA ,  Hajime AKIMOTO

IPC: G02B27/01

CPC classification number: G02B27/0101 ,  G02B2027/0112 ,  G02B2027/0154 ,  G02B2207/123

Abstract: A light source unit includes a display device and an imaging optical system; the display device includes a pixel column including multiple pixels arranged along a first direction; the imaging optical system includes a movable optical system and an output element; light emitted from the display device is incident on the movable optical system; the movable optical system is movable around an axis parallel to the first direction and emits light at an angle corresponding to a movement state; light is incident on the output element via the movable optical system; and the light emitted from the output element forms a first image. The imaging optical system is substantially telecentric at the first image side; and the light emitted from the display device has a substantially Lambertian light distribution.

公开(公告)号：US20240160014A1

公开(公告)日：2024-05-16

申请号：US18496594

申请日：2023-10-27

Applicant: NICHIA CORPORATION

Inventor： Wataru KITAHARA ,  Takanori ARUGA ,  Hajime AKIMOTO

IPC: G02B27/01 ,  G02F1/1335

CPC classification number: G02B27/0101 ,  G02F1/133536 ,  G02F1/133553

Abstract: An image display device includes: a display device configured to display an image; a liquid crystal element on which light emitted from the display device is incident, the liquid crystal element being configured to selectively allow one of P-polarized light or S-polarized light to exit the liquid crystal element; a reflective polarizing member configured to reflect the one of the P-polarized light or the S-polarized light that has exited the liquid crystal element and to transmit the other of the P-polarized light or the S-polarized light; and a reflecting member configured to reflect the other of the P-polarized light or the S-polarized light in the same direction as a travel direction of the one of the P-polarized light or the S-polarized light reflected by the reflective polarizing member

公开(公告)号：US20250085539A1

公开(公告)日：2025-03-13

申请号：US18956890

申请日：2024-11-22

Applicant: NICHIA CORPORATION

Inventor： Wataru KITAHARA ,  Takanori ARUGA ,  Hajime AKIMOTO

IPC: G02B27/01

Abstract: A light source unit includes: a display device configured to emit light that has a substantially Lambertian light distribution and to display an image including a plurality of pixels; a color change sheet on which light emitted from the display device is incident; an imaging optical system including an input element and an output element configured such that light emitted from the color change sheet is incident on the input element, light traveling via the input element is incident on the output element, and light emitted from the output element forms a first image corresponding to the image; and a drive unit configured to change a positional relationship of the display device and the color change sheet.