Title:
COMBINER, HEAD-UP DISPLAY, MOBILE BODY, AND AUTOMOBILE
Document Type and Number:
WIPO Patent Application WO/2023/008576
Kind Code:
A1
Abstract:
A combiner 40 is used for a head-up display 20 and receives image light projected thereto. The combiner 40 has: a first substrate 51 that includes a first surface 41 serving as an incident surface for image light; a second substrate 52 that includes a second surface 42; a bonding layer 45 that bonds the first substrate 51 and the second substrate 52; and a holographic element 60 located between the first substrate 51 and the second substrate 52. The holographic element 60 diffracts image light: in a direction of positive reflection relative to the direction of incidence of the image light upon the combiner 40; or in a direction inclined at an angle of 5° or less to the direction of positive reflection. A distance LX between the holographic element 60 and a display position PX of an imaginary image 80 that is caused by the image light diffracted by the holographic element 60 is four or more times greater than a distance LY between the holographic element 60 and a display position PY of a ghost image 81 that is caused by the image light reflected by the first surface 41 or the second surface 42.
Inventors:
YAMAUCHI TSUYOSHI (JP)
YOSHIDA SATORU (JP)
MIURA KEISUKE (JP)
AOKI YOSUKE (JP)
KUNIYASU HIROYUKI (JP)
YOSHIDA SATORU (JP)
MIURA KEISUKE (JP)
AOKI YOSUKE (JP)
KUNIYASU HIROYUKI (JP)
Application Number:
PCT/JP2022/029373
Publication Date:
February 02, 2023
Filing Date:
July 29, 2022
Export Citation:
Assignee:
DAINIPPON PRINTING CO LTD (JP)
International Classes:
G02B27/01; G02B5/32
Domestic Patent References:
| WO2011074209A1 | 2011-06-23 | |||
| WO2019031443A1 | 2019-02-14 |
Foreign References:
| JPH09101478A | 1997-04-15 | |||
| JPH0950227A | 1997-02-18 | |||
| JP2021021829A | 2021-02-18 | |||
| US6359737B1 | 2002-03-19 | |||
| JPH07205680A | 1995-08-08 |
Attorney, Agent or Firm:
MIYAJIMA Manabu et al. (JP)
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