VIRTUAL-IMAGE DISPLAY DEVICE

WIPO Patent Application WO/2021/240985

A1

A HUD (100) as a virtual-image display device comprises: a projector (31) for projecting display light; an optical member (21) constituting an optical path (L) from the projector (31) to a translucent member (3); and a polarization adjustment member (34) for adjusting polarization, the polarization adjustment member (34) being positioned between the projector (31) and the optical member (21) on the optical path (L). The projector (31) has, in an orientation inclined relative to the optical axis (Ap) of the display light, a projection surface (32a) for projecting display light onto the polarization adjustment member (34). The polarization adjustment member (34) has, in an orientation along the projection surface (32a), a plate-shaped polarizing part (36) having polarizing characteristics. The relationship d < Hp/(Hv∙cos θ) is satisfied, where (d) is defined as the interval between the projection surface (32a) and the plate-shaped polarizing part (36), (Hp) is defined as the projection size of the projection surface (32a), (Hv) is defined as the display size of a virtual image corresponding to the projection size, and (θ) is defined as the angle of inclination of the projection surface (32a) relative to the optical axis (Ap).

YAMAGUCHI MASAYUKI (JP)

PCT/JP2021/013337

December 02, 2021

March 29, 2021

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DENSO CORP (JP)

B60K35/00; G02B27/01

JP2011022210A	2011-02-03
JP2019101056A	2019-06-24
JP2019049581A	2019-03-28
US20150168717A1	2015-06-18

YAHAGI Kazuyuki et al. (JP)

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