Title:
LIGHT GUIDING PLATE, LIGHT GUIDING PLATE MODULE, AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/168397
Kind Code:
A1
Abstract:
The problem addressed by the present invention is to suppress luminance changes caused by pixel positions in image information viewed by a user. A preferable aspect of the present invention is a light guiding plate comprising: a substrate; an incidence diffraction grating for diffracting incident light; and an emission diffraction grating for emitting, from the substrate, light diffracted by the incidence diffraction grating. The emission diffraction grating has a mesh-like grating pattern formed on the substrate. The mesh-like grating pattern is formed from a first parallel straight line group and a second parallel straight line group intersecting the first parallel straight line group. The pitch of the first parallel straight line group and the pitch of the second parallel straight line group are equal. Between the incidence diffraction grating and the mesh-like grating pattern, a line region is provided that consists only of the first parallel straight line group or the second parallel straight line group.
Inventors:
MINEMURA HIROYUKI (JP)
Application Number:
PCT/JP2021/042310
Publication Date:
August 11, 2022
Filing Date:
November 17, 2021
Export Citation:
Assignee:
HITACHI LG DATA STORAGE INC (JP)
International Classes:
G02B27/02; G02B1/02; G02B5/08; G02B5/18; G02B6/124; H04N5/64
Domestic Patent References:
| WO2020255482A1 | 2020-12-24 |
Foreign References:
| US20200264378A1 | 2020-08-20 | |||
| JP2020008599A | 2020-01-16 | |||
| JP2016188901A | 2016-11-04 | |||
| EP3730991A1 | 2020-10-28 |
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
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