US 12,294,691 B2
Image display apparatus
Akira Tanaka, Kanagawa (JP); Kazuki Yokoyama, Kanagawa (JP); and Tomoya Yano, Kanagawa (JP)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 17/779,339
Filed by SONY GROUP CORPORATION, Tokyo (JP)
PCT Filed Nov. 25, 2020, PCT No. PCT/JP2020/043888
§ 371(c)(1), (2) Date May 24, 2022,
PCT Pub. No. WO2021/111954, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 2019-218841 (JP), filed on Dec. 3, 2019.
Prior Publication US 2022/0408076 A1, Dec. 22, 2022
Int. Cl. H04N 13/363 (2018.01); G02B 27/01 (2006.01); H04N 13/00 (2018.01); H04N 13/111 (2018.01); H04N 13/32 (2018.01); H04N 13/322 (2018.01)
CPC H04N 13/363 (2018.05) [G02B 27/0103 (2013.01); H04N 13/111 (2018.05); H04N 13/32 (2018.05); H04N 13/322 (2018.05); H04N 2013/0092 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An image display apparatus, comprising:
a plurality of projectors that projects image light corresponding to image data with reference to projection axes thereof and is disposed such that the projection axes face in directions different from each other along a first plane;
a screen that is disposed to intersect with the first plane at a first elevation angle and diffuses and outputs the image light projected along the first plane at a second elevation angle different from the first elevation angle;
an image generator that generates the image data for displaying a plurality of viewpoint images corresponding to viewpoints at which the screen is observed at the second elevation angle on a basis of the directions of the projection axes on the first plane; and
an arc shaped free-form mirror that collimates the image light projected from the plurality of projectors, converts the image light into parallel light, and makes the image light incident on the screen at the first elevation angle,
wherein a portion of the arc shaped free-form mirror is provided obliquely under and below the screen in a vertical direction, and
wherein the screen includes a transparent base material attached to a mono-slant transmissive holographic optical element with interference fringes formed at a uniform slant angle that initially receives the parallel light.