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.:
Date of Patent:
Sep. 05, 2023
Filed:
Mar. 31, 2021
Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US);
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Debasish Banerjee, Ann Arbor, MI (US);
Songtao Wu, Ann Arbor, MI (US);
Naohide Uchida, Shizuoka, JP;
Takeshi Yamakawa, Shizuoka, JP;
Hidetaka Asano, Aichi-ken, JP;
Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US);
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A multilayer thin film that reflects an omnidirectional structural color having a reflective core layer comprising a metallic material, a second layer extending across the reflective core layer, a third layer extending across the second layer, and an outer layer extending across the third layer. The multilayer thin film reflects a single narrow band of visible light that is less than 30° measured in Lab color space when viewed from angles between 0° and 45°, and the reflective core layer has a skin depth δ of greater than or equal to 1.0 μm in a frequency range from 20-40 GHz, as calculated by: δ is skin depth in meters (m); ρ is resistivity in ohm meter (Ω·m); f is frequency of an electromagnetic radiation in hertz (Hz); μis permeability; and μis relative permeability of the metallic material.