Title:
VIRTUAL IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/116778
Kind Code:
A1
Abstract:
This virtual image display device (10) is provided with: a projection member (13) that projects an image; and a projection optical system (11, 12) that forms a virtual image (40). The virtual image distance (VID) from an observer (30) to the virtual image (40) is at least 2,500 mm. The projection optical system (11, 12) has one or more reflective members (11, 12). A reflective surface of the final reflective member (11), which is included in the one or more reflective members (11, 12) and is the last to reflect light, satisfies the following condition (1). 10° ≤ |θzmax-θzmin| ≤ 30°…(1) Here, θz is the angle formed by a normal vector perpendicular to a tangential plane passing through the origin of the final reflective member (11) and a normal vector of a tangential plane at an arbitrary point, θzmax is the maximum value of θz, and θzmin is the minimum value of θz. Thus, there is provided a virtual image display device (10) which has a small size and suppresses an increase in the temperature of the members due to the focusing of external light.
Inventors:
MIYAMOTO TOMOAKI
Application Number:
PCT/JP2017/042983
Publication Date:
June 28, 2018
Filing Date:
November 30, 2017
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G02B27/01; B60K35/00
Domestic Patent References:
| WO2016162928A1 | 2016-10-13 | |||
| WO2015190157A1 | 2015-12-17 | |||
| WO2016079927A1 | 2016-05-26 |
Foreign References:
| JP2016014861A | 2016-01-28 | |||
| JP2000241748A | 2000-09-08 | |||
| JP2015194707A | 2015-11-05 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
Download PDF: