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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12638678 B1

PDFFull Text
Date of Patent:
May. 26, 2026

Filed:

Sep. 15, 2023

Optical functional film for head-up display, optical laminate, functional glass, and head-up display system

Applicant:

Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;

Inventors:

Mitsunori Nakamura, Tokyo, JP;

Chihiro Takahashi, Tokyo, JP;

Tomoyuki Hayasaki, Joetsu, JP;

Yoshihiko Taira, Tokyo, JP;

Yoshiyuki Yahagi, Tokyo, JP;

Assignee:

NIPPON KAYAKU KABUSHIKI KAISHA, Tokyo, JP;

Attorney:

Chrisman Gallo Tochtrop LLC

Primary Examiner:

Phu Vu

Int. Cl.
CPC ...
G02B 27/01 (2006.01); B32B 17/10 (2006.01); B60K 35/23 (2024.01);
U.S. Cl.
CPC ...
G02B 27/0101 (2013.01); B32B 17/10036 (2013.01); B32B 17/10504 (2013.01); B32B 17/10761 (2013.01); B60K 35/23 (2024.01); B32B 2307/418 (2013.01); B32B 2307/54 (2013.01); B32B 2457/20 (2013.01); G02B 2027/0118 (2013.01);
Abstract

An optical functional film for a head-up display according to the present disclosure includes (A) two or more phase difference layers and (B) an adhesive layer. The adhesive layer is adjacent to at least one phase difference layer, and an absolute value of difference between a refractive index of the adhesive layer and a refractive index of the phase difference layer adjacent to the adhesive layer in a direction of a fast axis is less than 0.060.

Find Patent Forward Citations

Nakamura, Mitsunori. (2026). Optical functional film for head-up display, optical laminate, functional glass, and head-up display system (U.S. Patent No. 12638678). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12638678

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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