公开(公告)号：US20240427168A1

公开(公告)日：2024-12-26

申请号：US18734333

申请日：2024-06-05

Applicant: ALPS ALPINE CO., LTD.

Inventor： Takashi YOSHIMURA

IPC: G02B30/56 ,  G02B5/122

Abstract: A display device is capable of displaying an aerial image using retroreflection. The display device includes a light source, a three-dimensional object having at least one optical characteristic of light guiding or light diffusion and being illuminated by the light source, a retroreflective member configured to reflect light of the three-dimensional object, and an optical member that transmits the light reflected by the retroreflective member to form an aerial image of the three-dimensional object. The three-dimensional object includes at least an upper surface and one or more side surfaces connected to the upper surface, where at least part of the one or more side surfaces is tapered.