VIRTUAL IMAGE DISPLAY DEVICE

WIPO Patent Application WO/2019/087615

A1

This virtual image display device comprises: a reflective transmission member (40) which, by comprising an optical multilayer film (43), has a reflection wavelength region serving as a wavelength region that reflects light, and a transmission wavelength region serving as a wavelength region that transmits light; a liquid crystal display device (20) that emits display light of an image to the reflective transmission member; and a reciprocating reflection member (50) constituting a reciprocating optical path (OP1) where the display light is caused to reciprocate between the reflective transmission member and the reciprocating reflection member by reflecting the display light traveling via the reflective transmission member back to the reflective transmission member. A HUD device (100) utilizes a shift action by which the reflection wavelength region and the transmission wavelength region are shifted by causing a first incident angle (θ1) and a second incident angle (θ2) which are incident on the optical multilayer film to differ, and as a result thereof, first incident display light of the first incident angle is guided to the reciprocating reflection member side of the reciprocating optical path, and second incident display light of the second incident angle is guided to a projection unit (3a). The foregoing makes it possible to improve the visibility of a virtual image.

YOKOE JUNYA (JP)

PCT/JP2018/035137

May 09, 2019

September 21, 2018

Click for automatic bibliography generation  

DENSO CORP (JP)

G02B27/01; B60K35/00; G02B26/10

WO2016147570A1

2016-09-22

JP2017015805A	2017-01-19
JP2003161820A	2003-06-06
JPH02132411A	1990-05-21
JPH01126620A	1989-05-18
JP2012063524A	2012-03-29
JP2017151403A	2017-08-31
US20120032875A1	2012-02-09

JIN Shunji (JP)

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