Invention Grant
- Patent Title: Optical laminate structure and head-up display system using the optical laminate structure, and light reflection film
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Application No.: US16150974Application Date: 2018-10-03
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Publication No.: US10525666B2Publication Date: 2020-01-07
- Inventor: Tomoyuki Hayasaki , Hitoshi Asami , Yoshiyuki Yahagi , Chihiro Takahashi , Kouichi Tanaka
- Applicant: NIPPON KAYAKU KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: NIPPON KAYAKU KABUSHIKI KAISHA
- Current Assignee: NIPPON KAYAKU KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Pearne & Gordon LLP
- Priority: JP2016-078343 20160408
- Main IPC: B32B7/02
- IPC: B32B7/02 ; B32B27/30 ; B60K35/00 ; G02B5/26 ; G02B5/30 ; G02B27/01 ; G02B27/28

Abstract:
An optical laminate structure includes a light control laminate having at least one light reflection layer, a first quarter wave plate laminated on one of surfaces of the light reflection layer, and a second quarter wave plate laminated on another surface of the light reflection layer. The light reflection layer includes a right-handed circularly polarized light reflection layer or a left-handed circularly polarized light reflection layer, and an angle formed by a polarization axis of the S-polarized light or P-polarized light incident from a position inclined from an axis perpendicular to a surface of the light control laminate by 45° or more and 65° or less and a slow axis of the first quarter wave plate on a side to which the S-polarized light or P-polarized light is incident is 5° or more and less than 45°.
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