Omnidirectional High Chroma Red Structural Color

Abstract

This application relates to an omnidirectional high chroma red structural color. A multilayer film reflecting an omnidirectional high chroma red structural color. The multilayer film can include a reflector layer, at least one absorber layer extending across the reflector layer, and an outer dielectric layer extending across the at least one absorber layer. The multilayer film reflects a single narrowband of visible light when exposed to white light, and the outer dielectric layer has a thickness less than or equal to 2.0 quarter wave (QW) of a center wavelength of the single narrowband of visible light.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part (CIP) of U.S. Patent Application Serial Nos. 14 / 793,117; 14 / 793,123; 14 / 793,133, all of which were filed on July 7, 2015, all of which were filed CIP of US Patent Application No. 14 / 607,933 filed January 28, all of which are hereby incorporated by reference in their entirety. technical field [0003] This specification relates generally to multilayer interference films for displaying highly chroma red structural colors, and more particularly to multilayer interference films displaying highly chroma red structural colors omnidirectionally. Background technique [0004] Pigments made from multilayer structures are known. Furthermore, pigments which exhibit or provide highly chromatic omnidirectional structural colors are also known. Such pigments require as many as 39 dielectric layers to obtain the desired color properties, and the costs associated with the production of mult...

AI Technical Summary

Problems solved by technology

Specifically, control of the angular independence of red is difficult due to the need for thicker dielectric layers, which leads to high harmonic designs, i.e., the presence of second and possibly third harmonics is not possible Avoided

Also, the hue space for deep red in the Lab color space is very narrow, and multilayer films showing red have high angular variance

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