US 12,242,085 B2
Aerial image display device
Hayato Kikuta, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/790,520
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Feb. 26, 2020, PCT No. PCT/JP2020/007632
§ 371(c)(1), (2) Date Jul. 1, 2022,
PCT Pub. No. WO2021/171403, PCT Pub. Date Sep. 2, 2021.
Prior Publication US 2023/0035023 A1, Feb. 2, 2023
Int. Cl. G02B 30/56 (2020.01)
CPC G02B 30/56 (2020.01) 14 Claims
OG exemplary drawing
 
1. An aerial image display device comprising:
an image display to display an image;
an aerial image formation optical system to cause diffuse light emitted from the image display to form an image again in a different space by reflecting the light multiple times and allowing the light to pass through; and
processing circuitry
to acquire viewpoint position information on an observer viewing a point where the diffuse light is caused to form the image again by the aerial image formation optical system, and
to control the image from the image display depending on an angle formed by a straight line connecting an end point of a retroreflective sheet and an eye of the observer and a straight line extending from the eye of the observer and reaching the retroreflective sheet right in front.