US 12,461,384 B2
Air floating video display apparatus
Hiroaki Takahashi, Kyoto (JP); Koji Hirata, Kyoto (JP); Koji Fujita, Kyoto (JP); and Toshinori Sugiyama, Kyoto (JP)
Assigned to MAXELL, LTD., Kyoto (JP)
Appl. No. 18/268,621
Filed by Maxell, Ltd., Kyoto (JP)
PCT Filed Mar. 10, 2022, PCT No. PCT/JP2022/010739
§ 371(c)(1), (2) Date Jun. 21, 2023,
PCT Pub. No. WO2022/209721, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2021-061560 (JP), filed on Mar. 31, 2021.
Prior Publication US 2024/0045227 A1, Feb. 8, 2024
Int. Cl. G02B 30/56 (2020.01); G02F 1/1335 (2006.01); G03B 21/00 (2006.01); H05K 5/00 (2006.01); G02B 5/136 (2006.01); G02B 27/28 (2006.01)
CPC G02B 30/56 (2020.01) [G02F 1/133512 (2013.01); G02F 1/133528 (2013.01); G03B 21/006 (2013.01); H05K 5/0086 (2013.01); G02B 5/136 (2013.01); G02B 27/288 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An air floating video display apparatus configured to form an air floating video, the air floating video display apparatus comprising:
a housing having a shape that is longer in a height direction than in a direction orthogonal to the height direction;
a window portion which is provided in a part of the housing and through which a video light for forming the air floating video passes;
a video display apparatus which is provided inside the housing and includes a light source apparatus and a liquid crystal display panel configured to generate the video light of a specific polarized wave for forming the air floating video based on a light from the light source apparatus and emit the generated light;
a polarization separator which is provided inside the housing and is configured to transmit the video light of the specific polarized wave from the video display apparatus and reflect the video light from a retroreflector;
the retroreflector which is provided inside the housing and is configured to retroreflect the video light from the polarization separator;
a retardation plate provided on a retroreflection surface of the retroreflector; and
a plane mirror which is arranged in a space connecting the video display apparatus and the polarization separator inside the housing and is configured to reflect the video light of the specific polarized wave from the video display apparatus toward the polarization separator, wherein
in an up-down direction of the housing, the retroreflector is arranged above an arrangement position of the polarization separator, the plane mirror and the video display apparatus are arranged below the arrangement position of the polarization separator, and an arrangement position of the plane mirror is above an arrangement position of the video display apparatus.