公开(公告)号：US20250164820A1

公开(公告)日：2025-05-22

申请号：US18944648

申请日：2024-11-12

Applicant: ALPS ALPINE CO., LTD.

Inventor： Shingo YUZA ,  Katsunari ASHIMINE ,  Akitomo MURATA

IPC: G02B30/56 ,  G02B27/14

Abstract: A display device for displaying an aerial image using retro-reflection includes: an optical member configured to separate incident light into reflected light and transmitted light; a retro-reflective member positioned to face the optical member and having a cutout or an opening that features a design; a light source positioned on a backside of the retro-reflective member; and a transparent member made of a substance with a refractive index greater than 1, and positioned between the optical member and the retro-reflective member.

公开(公告)号：US20250164819A1

公开(公告)日：2025-05-22

申请号：US18941605

申请日：2024-11-08

Applicant: ALPS ALPINE CO., LTD.

Inventor： Shingo YUZA ,  Akitomo MURATA

IPC: G02B30/56 ,  G02B5/124 ,  G02B27/14 ,  G02B27/28

Abstract: A display device capable of displaying an aerial image by using retroreflection, the display device includes: an optical member configured to transmit a part of incident light and to reflect the rest; a retroreflective member which is arranged so as to face the optical member and having a notch or an opening for generating a design of an original image of an aerial image; a light source configured to illuminate the retroreflective member from a back surface side; and a transparent intermediate layer that is arranged between the optical member and the retroreflective member having a material with a refractive index of less than 1.

公开(公告)号：US20250035952A1

公开(公告)日：2025-01-30

申请号：US18765550

申请日：2024-07-08

Applicant: ALPS ALPINE CO., LTD.

Inventor： Manabu SUZUKI ,  Akitomo MURATA

IPC: G02B30/56

Abstract: A display device for displaying an aerial image using retro-reflection includes: a light source configured to output an image; an optical member configured to split incident light into reflected light and transmitted light at a predetermined ratio; and a retro-reflective member configured to reflect light incident thereon from the optical member. In this display device, light representing the image is incident on the retro-reflective member through the optical member, and an aerial image is displayed by the light reflected by the retro-reflective member. The retro-reflective member is inclined such that light that is a specularly reflected part of the light incident on the retro-reflective member from the optical member is oriented in a direction away from a direction of the aerial image.