公开(公告)号：US20250008075A1

公开(公告)日：2025-01-02

申请号：US18884087

申请日：2024-09-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： ATSUSHI FUKUI ,  YOSUKE ARAKI ,  WAHEI AGEMIZU ,  TAKASHI MATSUDA ,  KAZUMASA TAKATA

IPC: H04N13/322 ,  H04N13/398

Abstract: A display device according to a present exemplary embodiment includes: a varifocal lens having a variable focal length; a display disposed facing the varifocal lens; and a controller configured to control the focal length of the varifocal lens, and to cause the display to display an image. The controller is configured to shorten the focal length of the varifocal lens when a distant image is to be displayed on display, and to extend the focal length f of varifocal lens when a nearby image is to be displayed on the display.

公开(公告)号：US20230400613A1

公开(公告)日：2023-12-14

申请号：US18458185

申请日：2023-08-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： ATSUSHI FUKUI ,  KAZUMASA TAKATA ,  YOSUKE ARAKI

IPC: G02B5/18 ,  H04J14/02

CPC classification number: G02B5/1866 ,  H04J14/0307

Abstract: An optical multiplexer includes a plurality of light sources that emit a plurality of laser beams having different wavelengths, a collimator that collimates a plurality of laser beams emitted from a plurality of light sources, and a diffraction grating that diffracts a plurality of laser beams collimated by the collimator and emits a plurality of laser beams along a same optical path, the diffraction grating being of a transmission-type. A plurality of light sources are linearly arranged on an incident side focal plane of the collimator, a grating surface of the diffraction grating is disposed on an emission side focal plane of the collimator, and distance D between two adjacent light sources is set to satisfy D=f×(λ1−λ2)/p, where λ1, λ2 (λ1>λ2) are respectively wavelengths of laser beams emitted from the two adjacent light sources.

公开(公告)号：US20250036077A1

公开(公告)日：2025-01-30

申请号：US18912677

申请日：2024-10-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YOSUKE ARAKI ,  ATSUSHI FUKUI ,  WAHEI AGEMIZU ,  KAZUMASA TAKATA ,  KENICHIRO MASE

IPC: G03H1/02 ,  G03H1/20

Abstract: A hologram manufacturing device includes a master hologram on which a diffraction grating is formed, a duplicate hologram disposed close to the master hologram, a first light source that emits, to the master hologram and the duplicate hologram, a first laser light that satisfies a Bragg diffraction condition in the diffraction grating, a second light source that emits, to the master hologram and the duplicate hologram, a second laser light that does not satisfy the Bragg diffraction condition in the diffraction grating, and a sensor that measures the second laser light. The hologram manufacturing device ends exposure of the duplicate hologram with the first laser light based on a measurement result of the sensor.

公开(公告)号：US20230375770A1

公开(公告)日：2023-11-23

申请号：US18363188

申请日：2023-08-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YOSUKE ARAKI ,  WAHEI AGEMIZU ,  KAZUMASA TAKATA ,  MASARU FUJITA

IPC: F21V8/00

CPC classification number: G02B6/0046 ,  G02B6/0038

Abstract: Light control body (6) has first incident surface (7) and first reflection surface (9). First incident surface (7) condenses part of light emitted from light source (1) and emits the light toward incident surface (3) of light guide plate (2). First reflection surface (9) reflects the light that is emitted from light source (1) and does not pass through first incident surface (7), and emits the light toward incident surface (3) of light guide plate (2). First focal position (11) of first incident surface (7) and second focal position (12) of first reflection surface (9) are set at positions that are different from each other and away from the light emission surface of light source (1).

公开(公告)号：US20210356752A1

公开(公告)日：2021-11-18

申请号：US17235088

申请日：2021-04-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KAZUMASA TAKATA ,  MASARU FUJITA ,  WAHEI AGEMIZU ,  YOSUKE ARAKI ,  TOMOHISA SAKAGUCHI

IPC: G02B27/09 ,  G02B27/01 ,  B60K37/02

Abstract: An optical system includes a light guide member and a plurality of prism pieces. The light guide member has an incident surface on which light is incident, and first and second surfaces facing each other, and the second surface is a light-emitting surface. The plurality of prism pieces are provided on the first surface and reflect the light passing through an inside of the light guide member toward the second surface. The plurality of prism pieces include two or more prism pieces having different inclination angles with respect to an incident surface depending on a position in at least a first direction along both the incident surface and the first surface. The inclination angles of two or more prism pieces are determined so that the light emitted from the second surface is directed to the outside or the inside of the first direction with respect to a reference light beam as the prism piece is positioned closer to both ends of the first surface in the first direction.

公开(公告)号：US20210088195A1

公开(公告)日：2021-03-25

申请号：US16997043

申请日：2020-08-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TOMOHISA SAKAGUCHI ,  YOSUKE ARAKI ,  KAZUMASA TAKATA

IPC: F21S41/275 ,  F21V5/00 ,  F21S41/143 ,  F21S41/30

Abstract: A lighting device includes light emitting element; first lens that receives light emitted from light emitting element and emits first emission light; and second lens that receives the first emission light and emits second emission light. Second lens includes second convex incident surface receiving the first emission light, second convex emission surface that is provided on a right side of a drawing and emits the second emission light, and second top surface portion and second bottom surface portion each located between second incident surface and second emission surface. Second bottom surface portion includes first inclined surface and second inclined surface formed to be inclined with respect to an optical axis of light emitting element.

公开(公告)号：US20210088194A1

公开(公告)日：2021-03-25

申请号：US16998779

申请日：2020-08-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YOSUKE ARAKI ,  RYOMA MURASE ,  KAZUMASA TAKATA ,  JUN HIRAI ,  HIROSHI UMIJI ,  HIROSHI HAMANO

IPC: F21S41/25 ,  F21V5/00 ,  F21V3/02 ,  F21S41/143 ,  F21S41/30

Abstract: A lighting device includes a light emitting element; a first lens that receives light emitted from the light emitting element and emits first emission light; and a second lens that receives the first emission light and emits second emission light. The first lens has a first emission surface emitting the first emission light, the first emission surface having a convex shape protruding in a Z direction.