Title:
VIDEO DISPLAY DEVICE AND OPTICAL SEE-THROUGH DISPLAY
Document Type and Number:
WIPO Patent Application WO/2018/043254
Kind Code:
A1
Abstract:
A video display device includes: a video display element for displaying a video image via the emission of image light made up of visible light; and a holographic optical element that diffracts and reflects the image light. The video display element has an emission peak wavelength corresponding to the three primary colors R, G, B in the image light, and the holographic optical element has a diffraction peak wavelength corresponding to the emission peak wavelength. The diffraction ratio of G is 5 through 25% that is the smallest among the diffraction ratios for R, G, and B assuming that the diffraction amounts at wavelengths of 400 through 490 nm, 490 through 580 nm, and 580 through 680 nm are the diffraction amounts for B, G, and R, respectively, and assuming that (diffraction amount of B) / (total diffraction amounts of R, G, B), (diffraction amount of G) / (total diffraction amounts of R, G, B), and (diffraction amount of R) / (total diffraction amounts of R, G, B) are the diffraction ratios for B, G, and R, respectively.
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Inventors:
OGURA TAKUYA (JP)
Application Number:
PCT/JP2017/030172
Publication Date:
March 08, 2018
Filing Date:
August 23, 2017
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B27/02; B60K35/00; G02B5/26; G02B5/28; G02B5/32; G02B27/01; H04N5/64
Foreign References:
| JP2010271526A | 2010-12-02 | |||
| JP2008250254A | 2008-10-16 | |||
| US20160116739A1 | 2016-04-28 | |||
| JP2000276036A | 2000-10-06 | |||
| JP2006184869A | 2006-07-13 |
Other References:
See also references of EP 3508906A4
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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