US 12,228,749 B2
Floating image display device
Hayato Kikuta, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/437,844
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Mar. 28, 2019, PCT No. PCT/JP2019/013752
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2020/194699, PCT Pub. Date Oct. 1, 2020.
Prior Publication US 2022/0155614 A1, May 19, 2022
Int. Cl. G02B 30/56 (2020.01); G02B 30/32 (2020.01); G02B 30/33 (2020.01); G06F 3/01 (2006.01); H04N 13/312 (2018.01)
CPC G02B 30/56 (2020.01) [G02B 30/32 (2020.01); G02B 30/33 (2020.01); G06F 3/013 (2013.01); H04N 13/312 (2018.05)] 9 Claims
OG exemplary drawing
 
1. A floating image display device comprising:
an image display that displays an image;
a floating image formation optical system that causes diffuse light emitted from the image display to form a floating image again in a space;
a viewpoint position detector to acquire viewpoint position information on an observer observing the diffuse light that has passed through the floating image formation optical system; and
display control circuitry configured
to receive the viewpoint position information as an input and controls display image information outputted to the image display,
to estimate a floating image formation region, which contains the floating image the observer perceives, in the space by performing three-dimensional optical path tracking based on positional relationship in the floating image formation optical system and the viewpoint position information,
to estimate image resolution of the floating image in the floating image formation region based on the viewpoint position information and the positional relationship in the floating image formation optical system, and
to output the display image information to the image display based on information on the floating image formation region and the image resolution.