Head-up display optical film, head-up display, and vehicle

Details Head-up display optical film, head-up display, and vehicle Head-up display optical film, head-up display, and vehicle

2008-11-26

2010-11-23

Choi, William C (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

C359S013000

Reexamination Certificate

active

07839574

ABSTRACT:
A head-up display optical film includes: a first optical layer configured to convert the polarization plane of incident light by 90 degrees; a second optical layer configured to convert the polarization plane of incident light by 90 degrees; and an intermediate optical layer sandwiched between the first optical layer and the second optical layer and having a refractive index that is different from the refractive index of the first optical layer and from the refractive index of the second optical layer.

REFERENCES:
patent: 7158059 (2007-01-01), Noda et al.
patent: 2006/0023315 (2006-02-01), Robinson
patent: 2009/0128751 (2009-05-01), Wu et al.

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