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. 21, 2021
Filed:
Jan. 08, 2018
3m Innovative Properties Company, St. Paul, MN (US);
Tao Liu, Woodbury, MN (US);
Brian W. Ostlie, Hudson, WI (US);
Brent A. Hedding, Hudson, WI (US);
Charlie C. Ho, Woodbury, MN (US);
Yongshang Lu, Woodbury, MN (US);
Jay M. Jennen, Forest Lake, MN (US);
David C. Mercord, Prescott, WI (US);
Johnnie L. Williams, West Bloomfield, MI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A display system including a lightguide and first and second reflective layers disposed on opposite sides of the lightguide is provided. The lightguide has opposing first and second major surfaces and includes a light extraction pattern for extracting light that would otherwise be confined and propagate within the lightguide primarily by total internal reflection. Light extracted by the light extraction pattern exits the lightguide through at least one of the first and second major surfaces of the lightguide. Each of the first and second reflective layers has an average specular reflectance of at least 50% in a predetermined wavelength range. The light extraction pattern may be repeatedly imaged by the first and second reflective layers to produce three-dimensional stacked images of the light extraction pattern.