Title:
LIGHT GUIDE PLATE UNIT AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/024678
Kind Code:
A1
Abstract:
A technology for reducing an adverse effect caused by a structure formed near a diffraction grating is provided. The present disclosure provides a light guide plate unit including: a light guide plate; a first diffraction grating on a first surface side of the light guide plate, a second diffraction grating on the first surface side of the light guide plate, and a transition zone structure on the first surface side of the light guide plate. The transition zone structure extends from a first end point at or adjacent to the first diffraction grating to a vertex point, and from the vertex point to a second end point at or between the first end point and the second diffraction grating. The first and second end points are closer to the first surface of the light guide plate than the vertex point.
Inventors:
KATO KENTARO (JP)
SHIMIZU KAZUE (JP)
PEROZ CHRISTOPHE (JP)
CHANG CHIEH (TW)
KUWAHARA MIEKO (JP)
SHIMIZU KAZUE (JP)
PEROZ CHRISTOPHE (JP)
CHANG CHIEH (TW)
KUWAHARA MIEKO (JP)
Application Number:
PCT/JP2023/026810
Publication Date:
February 01, 2024
Filing Date:
July 21, 2023
Export Citation:
Assignee:
SONY GROUP CORP (JP)
International Classes:
G02B27/01
Domestic Patent References:
| WO2021255332A1 | 2021-12-23 |
Foreign References:
| US20220082936A1 | 2022-03-17 | |||
| US20220128817A1 | 2022-04-28 | |||
| JP2021039344A | 2021-03-11 | |||
| US20220229290A1 | 2022-07-21 | |||
| US20200333615A1 | 2020-10-22 | |||
| US20090190094A1 | 2009-07-30 | |||
| CN107797287A | 2018-03-13 | |||
| US20150003106A1 | 2015-01-01 | |||
| JP2020112614A | 2020-07-27 |
Attorney, Agent or Firm:
WATANABE Kaoru (JP)
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