公开(公告)号：US20240019621A1

公开(公告)日：2024-01-18

申请号：US18373753

申请日：2023-09-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keiji SUGIYAMA ,  Ken'ichi KASAZUMI ,  Yukihiro CHOKYU ,  Satoshi KUZUHARA ,  Kazuhiro MINAMI

IPC: F21V8/00 ,  G02B5/32

CPC classification number: G02B6/0041 ,  G02B6/0076 ,  G02B5/32 ,  G02B6/0031

Abstract: A light guide plate includes a hologram element that is a first hologram element including two or more diffraction cells, and a hologram element that is a second hologram element including a single diffraction cell.

公开(公告)号：US20230418120A1

公开(公告)日：2023-12-28

申请号：US18243162

申请日：2023-09-07

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Takato HADA ,  Takahiro AKIYOSHI ,  Hiroki HARA ,  Keiji SUGIYAMA

IPC: G02F1/1347 ,  G02F1/1333 ,  G02B27/01 ,  G03B21/16

CPC classification number: G02F1/1347 ,  G02F1/133382 ,  G02B27/0101 ,  G03B21/16 ,  B60K2370/785 ,  B60K2370/334

Abstract: Provided is a head-up display including a backlight configured to emit light, a light-diffusion member through which the light emitted by the backlight is transmitted, a Fresnel lens through which the light transmitted through the light-diffusion member is transmitted, a display screen through which the light transmitted through the Fresnel lens is transmitted, and a mirror that reflects the light transmitted through the light-diffusion member toward a target space.

公开(公告)号：US20230384589A1

公开(公告)日：2023-11-30

申请号：US18234188

申请日：2023-08-15

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Hiroki HARA ,  Yosuke ASAI ,  Keiji SUGIYAMA ,  Yuji TAKASE

IPC: G02B27/01 ,  B60K35/00 ,  H04N9/31

CPC classification number: G02B27/0101 ,  G02B2027/0118 ,  H04N9/3141 ,  B60K35/00

Abstract: A projection device includes: a plurality of light sources arranged in a first direction; a spatial modulation element that modulates incident light into image information and emits the image information; a lens that changes an optical path of light emitted from each of the plurality of light sources such that the light emitted from each light source reaches substantially the same region of an incident surface of the spatial modulation element; and a first reflective optical member that deflects the light emitted from the lens toward the spatial modulation element, the first reflective optical member having a shape that reflects light emitted from the lens so as to be incident on an arbitrary point on the incident surface of the spatial modulation element at a predetermined reference incident angle.

公开(公告)号：US20220283456A1

公开(公告)日：2022-09-08

申请号：US17748497

申请日：2022-05-19

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Takato HADA ,  Takahiro AKIYOSHI ,  Hiroki HARA ,  Keiji SUGIYAMA

IPC: G02F1/1347 ,  G02F1/1333 ,  G02B27/01 ,  G03B21/16

Abstract: A head-up display includes a liquid-crystal panel including a display screen provided at a front surface thereof, a Fresnel lens which is on an opposite side of the liquid-crystal panel from the display screen, a light-diffusion structure between the liquid-crystal panel and the Fresnel lens, a backlight that emits light toward the Fresnel lens, a light-transmissive member between the backlight and the Fresnel lens, a body part accommodating the Fresnel lens, and a mirror that forms a virtual image corresponding to an image displayed on the display screen of the liquid-crystal panel, in a target space. The body part has a step-shaped structure including a first step surface and a second step surface, the first and second step surfaces are oriented in the same direction as the front surface of the liquid-crystal panel. The first step surface is located on the liquid-crystal panel side from the second step surface.

公开(公告)号：US20220221717A1

公开(公告)日：2022-07-14

申请号：US17613261

申请日：2020-05-11

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Hiroki HARA ,  Yosuke ASAI ,  Keiji SUGIYAMA ,  Yuji TAKASE

IPC: G02B27/01 ,  H04N9/31 ,  B60K35/00

Abstract: A projection device includes: a plurality of light sources arranged in a first direction; a spatial modulation element that modulates incident light into image information and emits the image information; a lens that changes an optical path of light emitted from each of the plurality of light sources such that the light emitted from each light source reaches substantially the same region of an incident surface of the spatial modulation element; and a first reflective optical member that deflects the light emitted from the lens toward the spatial modulation element, the first reflective optical member having a shape that reflects light emitted from the lens so as to be incident on an arbitrary point on the incident surface of the spatial modulation element at a predetermined reference incident angle.

公开(公告)号：US20220276520A1

公开(公告)日：2022-09-01

申请号：US17748520

申请日：2022-05-19

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Takato HADA ,  Takahiro AKIYOSHI ,  Hiroki HARA ,  Keiji SUGIYAMA

IPC: G02F1/1347 ,  G02F1/1333 ,  G02B27/01 ,  G03B21/16

Abstract: Provided is a head-up display including a display system that has a liquid-crystal panel including a display screen, a Fresnel lens which is on an opposite side of the liquid-crystal panel from the display screen, and a backlight that emits light toward the Fresnel lens. The head-up display also includes a first mirror that reflects light from the display system, a second mirror that reflects light from the first mirror, and a control circuit that controls the liquid-crystal panel, where a center of the second mirror is closer to a center of the control circuit than a center of the display system in a direction connecting a center of the first mirror and the center of the second mirror.

公开(公告)号：US20220155625A1

公开(公告)日：2022-05-19

申请号：US17666184

申请日：2022-02-07

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Takato HADA ,  Takahiro AKIYOSHI ,  Hiroki HARA ,  Keiji SUGIYAMA

IPC: G02F1/1347 ,  G02F1/1333 ,  G02B27/01 ,  G03B21/16

Abstract: Provided is a head-up display including a liquid-crystal panel including a display screen, a Fresnel lens which is on an opposite side of the liquid-crystal panel from the display screen, a light-diffusion member between the liquid-crystal panel and the Fresnel lens, a backlight emitting light toward the Fresnel lens, a heat sink accommodating the light-diffusion member, the backlight and the Fresnel lens, and a mirror that forms a virtual image corresponding to an image displayed on the display screen of the liquid-crystal panel, in a target space, where a surface of the Fresnel lens facing the backlight is uneven.

公开(公告)号：US20210055584A1

公开(公告)日：2021-02-25

申请号：US17094239

申请日：2020-11-10

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Takato HADA ,  Takahiro AKIYOSHI ,  Hiroki HARA ,  Keiji SUGIYAMA

IPC: G02F1/1347 ,  G02F1/1333 ,  G02B27/01 ,  G03B21/16

Abstract: Provided is a display that includes a liquid-crystal panel, a heat-transfer member, and a light-diffusion member between the liquid-crystal panel and the heat-transfer member. The display includes a liquid-crystal panel, a heat-transfer member, and a light-diffusion structure. The liquid-crystal panel includes a display screen. The heat-transfer member is light-transmissive. The heat-transfer member is on an opposite side of the liquid-crystal panel from the display screen.

公开(公告)号：US20240027762A1

公开(公告)日：2024-01-25

申请号：US18375305

申请日：2023-09-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ken'ichi KASAZUMI ,  Keiji SUGIYAMA ,  Yukihiro CHOKYU ,  Masafumi SUEYOSHI ,  Kazuhiro MINAMI

IPC: G02B27/01

CPC classification number: G02B27/0103 ,  G02B2027/0105

Abstract: A light guide plate includes a first hologram element including a plurality of diffraction cells. At least one of edge lines of one diffraction cell among the plurality of diffraction cells included in the first hologram element is located at a position other than on extensions of all edge lines of an adjacent diffraction cell adjacent to the one diffraction cell, the adjacent diffraction cell being included in the plurality of diffraction cells.

公开(公告)号：US20220276521A1

公开(公告)日：2022-09-01

申请号：US17748571

申请日：2022-05-19

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Takato HADA ,  Takahiro AKIYOSHI ,  Hiroki HARA ,  Keiji SUGIYAMA

IPC: G02F1/1347 ,  G02F1/1333 ,  G02B27/01 ,  G03B21/16

Abstract: Provided is a head-up display including a liquid-crystal panel including a display screen, a Fresnel lens which is on an opposite side of the liquid-crystal panel from the display screen, a light-diffusion structure between the liquid-crystal panel and the Fresnel lens, and a mirror that forms a virtual image corresponding to an image displayed on the display screen of the liquid-crystal panel, in a target space, where the light-diffusion structure is thinner than the Fresnel lens, and the light-diffusion structure has a thickness equal to or smaller than 300 μm.