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Title:
HEAD-UP DISPLAY AND MOVING BODY HAVING HEAD-UP DISPLAY MOUNTED THEREON
Document Type and Number:
WIPO Patent Application WO/2019/230085
Kind Code:
A1
Abstract:
The present invention provides a head-up display capable of displaying a virtual image along a road surface without decreasing the contrast on a display device. A head-up display (100) for displaying a virtual image (I) includes a display device (110) and a projection optical system (140). The projection optical system (140) includes a first optical element (123) and a second optical element (125) arranged in order along the optical path from an image. When the optical path corresponding to the upper end of the virtual image is defined as an upper beam (Lu) and the optical path corresponding to the lower end is defined as a lower beam (Ll), and the diverging action is considered as negative and the converging action is considered as positive, the first optical element and the second optical element satisfy the conditional expressions P_u1 − Pl1 < 0 and P_u2 − Pl2 > 0, where P_u1 represents a local power with which the first optical element acts on the upper beam, Pl1 represents a local power with which the first optical element acts on the lower beam, P_u2 represents a local power with which the second optical element acts on the upper beam, and Pl2 represents a local power with which the second optical element acts on the lower beam.

Inventors:
KUZUHARA SATOSHI
OKAYAMA HIROAKI
Application Number:
PCT/JP2019/007246
Publication Date:
December 05, 2019
Filing Date:
February 26, 2019
Export Citation:
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Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B60K35/00; G02B27/01; G02B13/18; G02B17/08
Domestic Patent References:
WO2018066062A12018-04-12
Foreign References:
JP2017219755A2017-12-14
Other References:
See also references of EP 3805844A4
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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