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:
Feb. 23, 2021
Filed:
Apr. 24, 2018
Palo Alto Research Center Incorporated, Palo Alto, CA (US);
Krishnan Thyagarajan, Mountain View, CA (US);
José Ramón Martínez Saavedra, Madrid, ES;
Palo Alto Research Center Incorporated, Palo Alto, CA (US);
Abstract
One embodiment can provide a laminate film for optical filtering. The laminate film can include a flexible substrate, one or more Bragg-reflector stacks positioned on the flexible substrate, and a high-refractive-index layer positioned on the one or more Bragg-reflector stacks. A respective Bragg-reflector stack has a number of layers with alternating refractive indices, and the Bragg-reflector is configured to have a stopping band with a predetermined center wavelength. A refractive index of the high-refractive-index layer is greater than that of an adjacent layer of the one or more Bragg-reflector stacks, thereby reducing incident-angle sensitivity of the one or more Bragg-reflector stacks. Moreover, at least one Bragg-reflector stack is configured to achieve a predetermined hue.