IMAGE DISPLAY ELEMENT AND IMAGE DISPLAY DEVICE USING SAME

WIPO Patent Application WO/2022/054362

A1

The purpose of the present invention is to provide an image display element configured to consider resistance to environmental changes while using plastic for a light-guiding plate, and an image display device using the same.　To achieve the purpose, provided is an image display element having a light-guiding plate. The image display element comprises an incidence diffraction grating which diffracts incident light, and an emission diffraction grating from which light that has propagated through the light-guiding plate after being diffracted by the incidence diffraction grating is emitted, the incidence diffraction grating and the emission diffraction grating being each formed by a pattern of protrusions and recesses formed on a surface of the light-guiding plate, and the image display element being obtained by joining the light-guiding plate and a cover glass protecting the pattern of protrusions and recesses or two or more light-guiding plates with an air layer therebetween by a holding member, and being configured such that the light-guiding plate and the cover glass are formed by a plastic material, and the holding member has an air vent through which air in the air layer and outside air communicate.

TOMITA DAISUKE (JP)
MINEMURA HIROYUKI (JP)
ANZAI YUMIKO (JP)
SUENAGA HIDEO (JP)
TADA YUKINOBU (JP)

PCT/JP2021/023126

March 17, 2022

June 17, 2021

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HITACHI LG DATA STORAGE INC (JP)

G02B27/02

WO2020066193A1	2020-04-02
WO2018012108A1	2018-01-18

US20200400941A1

2020-12-24

SEIRYO I.P.C. (JP)

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