公开(公告)号：US20220276519A1

公开(公告)日：2022-09-01

申请号：US17748504

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, a backlight that emits light toward the light-transmissive member, 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 includes a plurality of fine particles and an average particle size of the plurality of fine particles is equal to or smaller than 20 um.

公开(公告)号：US20220276518A1

公开(公告)日：2022-09-01

申请号：US17748213

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 member between the liquid-crystal panel and the heat-transfer member, a backlight that emits light toward the heat-transfer member, a heat sink disposed along at least one side of the Fresnel lens and one side of backlight, 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 light-diffusion structure is provided to a surface of the light-diffusion member facing the liquid-crystal panel.

公开(公告)号：US20220252919A1

公开(公告)日：2022-08-11

申请号：US17733482

申请日：2022-04-29

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

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

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

Abstract: Provided is a head-up display including a liquid-crystal panel including a display screen provided at a front surface thereof, a Fresnel lens opposite 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 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 step surface and the second step surface 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, and the liquid-crystal panel is supported on the second step surface.

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：US20240027759A1

公开(公告)日：2024-01-25

申请号：US18375665

申请日：2023-10-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Wahei AGEMIZU ,  Kazumasa TAKATA ,  Masaru FUJITA ,  Tomohisa SAKAGUCHI ,  Hiroki HARA ,  Masaki AMIE

IPC: G02B27/01 ,  B60K35/00 ,  F21V8/00

CPC classification number: G02B27/0101 ,  B60K35/00 ,  G02B6/003 ,  G02B6/0036 ,  B60K2370/1529 ,  B60K2370/336 ,  B60K2370/23 ,  G02B2027/0118

Abstract: An optical system includes a light guide member and a prism. The light guide member has: an incident surface on which light is incident; and a first surface and a second surface facing each other. The second surface is a light emergent surface. The prism is provided for the first surface and reflects, toward the second surface, the light passing inside the light guide member. The light guide member includes a direct optical path, along which the light that has entered the light guide member through the incident surface is directly reflected from the prism and allowed to emerge from the second surface.

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.