US 12,273,502 B2
Image display device and image display method
Hideki Kakeya, Tsukuba (JP); and Hayato Mitomi, Tsukuba (JP)
Assigned to UNIVERSITY OF TSUKUBA, Tsukuba (JP)
Appl. No. 18/032,299
Filed by UNIVERSITY OF TSUKUBA, Tsukuba (JP)
PCT Filed Oct. 19, 2021, PCT No. PCT/JP2021/038578
§ 371(c)(1), (2) Date Apr. 17, 2023,
PCT Pub. No. WO2022/085676, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 2020-175498 (JP), filed on Oct. 19, 2020.
Prior Publication US 2023/0396755 A1, Dec. 7, 2023
Int. Cl. H04N 13/312 (2018.01); H04N 13/305 (2018.01); H04N 13/315 (2018.01)
CPC H04N 13/312 (2018.05) [H04N 13/305 (2018.05); H04N 13/315 (2018.05)] 7 Claims
OG exemplary drawing
 
1. An image display device for displaying a stereoscopic image by using a parallax barrier method, the image display device comprising:
an image display surface on which an image of left-eye image data and an image of right-eye image data are alternately displayed, the image display surface being transmissive;
an image forming unit including a plurality of optical members having a plurality of strip-shaped patterns with optical properties arranged on a surface located on a back surface side of the image display surface; and
a plurality of light sources having a strip shape adjacent to each other in a width direction of an illumination arrangement surface arranged on the illumination arrangement surface, which is a surface located on a back surface side of the image forming unit, and configured to irradiate the image display surface with illumination light, wherein
a slit area of the parallax barrier method is formed by an image obtained by forming an image of the illumination light from the light sources having a strip shape on the back surface side of the image display surface by using the optical members included in the image forming unit,
a focal length of the optical member is substantially equal to a distance between a position at which the optical member is arranged and a position at which the slit area of the parallax barrier method is arranged; and
the plurality of light sources having a strip shape are arranged on the illumination arrangement surface so that, out of the plurality of light sources having a strip shape arranged adjacent to each other in the width direction of the illumination arrangement surface, the images are in the same position for the light sources having a strip shape every predetermined number based on the parallax barrier method.