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1. (WO2018181233) DISPLAY DEVICE FOR DISPLAYING VIRTUAL IMAGE

Pub. No.:    WO/2018/181233    International Application No.:    PCT/JP2018/012274
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Mar 28 01:59:59 CEST 2018
IPC: G02B 27/01
B60K 35/00
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: MICHIMORI Atsushi
道盛 厚司
KISHIGAMI Tomo
岸上 智
KUWATA Muneharu
桑田 宗晴
KONDO Jun
近藤 潤
NAKAHARA Shota
中原 彰太
Title: DISPLAY DEVICE FOR DISPLAYING VIRTUAL IMAGE
Abstract:
A display device for displaying a virtual image is provided with: an image formation unit (6) for emitting first image light; a first reflection member (31) for reflecting the first image light and emitting second image light; a second reflection member (32) for reflecting the second image light and emitting third image light; a screen (11) for displaying an image on the basis of the third image light; and a projection unit (4) for projecting, as the virtual image, the image displayed on the screen. The screen (11) moves in a direction toward or away from the projection unit (4), and on this occasion, by the movement of the first reflection member (31) and/or the second reflection member (32), the rotation of the first reflection member (31), and the rotation of the second reflection member (32), a central ray of the third image light moves parallel while holding the position of a point of incidence on the screen (11), and the sum of the light path length of a central ray of the first image light, and the light path length of a central ray of the second image light, and the light path length of the central ray of the third image light becomes constant.