Title:
INFORMATION DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/061016
Kind Code:
A1
Abstract:
Provided is a compact information display device such that distortion including distortion on the reflection surface of a windshield can be eliminated and a highly visible virtual image can be formed for a driver to view. This information display device, which displays virtual video information on the vehicle windshield, includes: an image formation unit for forming the video information; and a virtual image optical system, including the windshield, for displaying the virtual image at the front of the vehicle by reflecting the light emitted from the image formation unit onto the windshield. The horizontal radius of curvature Rh and the vertical radius of curvature Rv of the windshield are different. The virtual image optical system includes a concave mirror that has a curved reflecting surface for cancelling out at least the difference between the horizontal radius of curvature Rh and vertical radius of curvature Rv of the windshield relative to the vehicle body.
Inventors:
HIRATA KOJI (JP)
YATSU MASAHIKO (JP)
KANEKO KAZUOMI (JP)
YATSU MASAHIKO (JP)
KANEKO KAZUOMI (JP)
Application Number:
PCT/JP2015/078677
Publication Date:
April 13, 2017
Filing Date:
October 08, 2015
Export Citation:
Assignee:
HITACHI MAXELL (JP)
HITACHI IND & CONTROL SOLUTIONS LTD (JP)
HITACHI IND & CONTROL SOLUTIONS LTD (JP)
International Classes:
G02B27/01; G09F9/00; B60K35/00
Foreign References:
| JP2005500568A | 2005-01-06 | |||
| US20140036374A1 | 2014-02-06 | |||
| JP2004168230A | 2004-06-17 |
Attorney, Agent or Firm:
TSUTSUI & ASSOCIATES (JP)
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