公开(公告)号：US20250138321A1

公开(公告)日：2025-05-01

申请号：US18923708

申请日：2024-10-23

Applicant: SEIKO EPSON CORPORATION

Inventor： Katsutoshi INOMOTO ,  Mitsutaka IDE ,  Takashi TAKEDA

IPC: G02B27/01 ,  G02B5/30 ,  G02B27/14

Abstract: A virtual-image display device or an optical unit includes a first display device configured to output image light of circularly polarized light; a first reflection member having a flat surface and configured to reflect the image light to a diagonal direction; and a second reflection member having a positive power and configured to reflect, toward the first reflection member, the image light reflected at the first reflection member. The first reflection member includes a first optical function layer that is one of a cholesteric liquid crystal layer and a transmissive reflection layer. The second reflection member includes a second optical function layer that is the other one of the cholesteric liquid crystal layer and the transmissive reflection layer.

公开(公告)号：US20240142707A1

公开(公告)日：2024-05-02

申请号：US18494765

申请日：2023-10-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Katsutoshi INOMOTO ,  Mitsutaka IDE ,  Masayuki TAKAGI ,  Takashi TAJIRI

IPC: G02B6/34 ,  G02B27/01

CPC classification number: G02B6/34 ,  G02B27/0172 ,  G02B2027/0178

Abstract: A virtual image display device includes a display panel being a display element configured to emit image light, a light-guiding member including a first total reflection surface and a second total reflection surface, a first diffraction element being provided on a light incidence side in association with the light-guiding member, a second diffraction element being provided on a light emission side in association with the light-guiding member, and a stray light suppression filter being provided on an external side of an image extraction part provided with the second diffraction element and being configured to limit passage of diffracted light from the second diffraction element.