Invention Grant
- Patent Title: Omnidirectional high chroma red structural color with combination metal absorber and dielectric absorber layers
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Application No.: US14793133Application Date: 2015-07-07
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Publication No.: US09658375B2Publication Date: 2017-05-23
- Inventor: Debasish Banerjee
- Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.
- Applicant Address: US KY Erlanger
- Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
- Current Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
- Current Assignee Address: US KY Erlanger
- Agency: Dinsmore & Shohl LLP
- Main IPC: G02B1/10
- IPC: G02B1/10 ; G02B5/28 ; G02B5/22 ; G02B5/08

Abstract:
A high-chroma omnidirectional red structural color pigment. The omnidirectional structural color pigment is in the form of a multilayer stack that has a reflective core layer, a metal absorber layer extending across the reflective core layer and a dielectric absorber layer extending across the metal absorber layer. The multilayer stack reflects a single band of visible light with a hue between 0-40°, and preferably between 10-30°, on an a*b* Lab color map. The single band of visible light has a hue shift of less than 30° on the a*b* Lab color map when viewed from all angles between 0-45° normal to an outer surface of the multilayer stack.
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