Title:
ILLUMINATION DEVICE FOR HOLOGRAM AND HOLOGRAM DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/111168
Kind Code:
A1
Abstract:
[Problem] To make effective area larger than in the prior art in an illumination device for a hologram and a hologram display device, in which diverging light is incident from a side surface of a light-guiding plate. [Solution] This illumination device for a hologram irradiates a hologram for image reproduction on which a stereoscopic image is recorded with illumination light. The illumination device for the hologram is characterized by being provided with: a light source; a light-guiding plate through which light from the light source propagates; a holographic optical element for illumination which receives at least part of the light propagating through the light-guiding plate to reproduce the illumination light; and an optical system which causes the light from the light source to be incident as diverging light on a side incident surface of the light-guiding plate in plan view, wherein, in plan view, the light-guiding plate has an approximately polygonal shape as a whole, and the central axis of the diverging light is disposed diagonally to sides of the approximately polygonal shape of the light-guiding plate.
Inventors:
HORIMAI HIDEYOSHI (JP)
KASEZAWA TOSHIHIRO (JP)
TABUCHI HIROSHI (JP)
NARA TOSHITAKA (JP)
KASEZAWA TOSHIHIRO (JP)
TABUCHI HIROSHI (JP)
NARA TOSHITAKA (JP)
Application Number:
PCT/JP2019/046518
Publication Date:
June 04, 2020
Filing Date:
November 28, 2019
Export Citation:
Assignee:
EGARIM CORP JAPAN (JP)
OKAMOTO GLASS CO LTD (JP)
OKAMOTO GLASS CO LTD (JP)
International Classes:
G03H1/22; F21S2/00; F21V8/00; G03B35/18; G09F19/12
Foreign References:
| JP2018155861A | 2018-10-04 | |||
| JP2015230410A | 2015-12-21 | |||
| JP2018136433A | 2018-08-30 | |||
| JP2018160426A | 2018-10-11 |
Attorney, Agent or Firm:
ISODA Shiro (JP)
Download PDF: