公开(公告)号：US20190163980A1

公开(公告)日：2019-05-30

申请号：US16097652

申请日：2017-05-12

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Justin M. JOHNSON ,  James W. HOWARD ,  James B. SNYDER ,  Kui CHEN-HO ,  Suman K. PATEL ,  Travis L. POTTS ,  Carla H. BARNES ,  Tadesse G. NIGATU

IPC: G06K9/00 ,  G08G1/017

Abstract: In some examples, an optically active article includes a retroreflective substrate; and at least one security element disposed at the retroreflective substrate; an article message disposed at the retroreflective substrate, and wherein the at least one security element comprises validation information that is detectable outside a visible light spectrum, and wherein a combination of the article message and the validation information of the at least one security element indicates whether the optically active article is counterfeit.

公开(公告)号：US20200341180A1

公开(公告)日：2020-10-29

申请号：US16757898

申请日：2018-10-26

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kui CHEN-HO ,  Michael A. MCCOY ,  John A. WHEATLEY ,  Susannah C. CLEAR ,  Michelle L. TOY ,  Alex P. PONGRATZ ,  Matthew E. SOUSA ,  Matthew B. JOHNSON ,  Gilles BENOIT ,  David J.W. AASTUEN ,  Guanglei DU ,  Tien Yi T.H. WHITING ,  Kevin W. GOTRIK ,  Christopher A. MERTON ,  Ying XIA ,  Olester BENSON, JR. ,  Charles A. SHAKLEE ,  Travis L. POTTS ,  Carla S. THOMAS

IPC: G02B5/30 ,  G02B5/124 ,  G02B5/128

Abstract: The disclosed light directing article has an optical element and a conformal retarder with predefined thickness that contours with the optical element. In one aspect, the light directing article is a retroreflective article, which further comprises a phase reversing optical reflector.

公开(公告)号：US20170372607A1

公开(公告)日：2017-12-28

申请号：US15540891

申请日：2015-12-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jeffrey D. JANOVEC ,  Kenneth L. SMITH ,  Michael R. DUOOS ,  Todd A. BALLEN ,  Travis L. POTTS ,  James HOWARD ,  Thomas J. DAHLIN

IPC: G08G1/0962 ,  G06K9/00 ,  G08G1/0967

CPC classification number: G08G1/09623 ,  G06K9/00818 ,  G08G1/095 ,  G08G1/0962 ,  G08G1/096716 ,  G08G1/096725 ,  G08G1/096758 ,  G08G1/096783

Abstract: Disclosed is an identification system to improve safety on roads and allow for the driver or for the vehicle itself, if it is autonomous or semi-autonomous, to have readable and useful information about road signs, roadways, and adjacent roadway information. The disclosed identification system comprises a marker with marker communication information that can be read by a vehicle information system to provide information to the vehicle. Information that the marker communication information may convey would allow the vehicle information system to detect or recognize, or both detect and recognize critical road sign, roadway information, and adjacent roadway information. Then, the vehicle information system could respond to the information received from the marker communication information.