公开(公告)号：US20200038969A1

公开(公告)日：2020-02-06

申请号：US16485032

申请日：2018-02-05

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Nelson D. SEWALL ,  Christopher S. GRINDE ,  Todd A. BALLEN ,  Kenneth L. SMITH

IPC: B23C3/10

Abstract: A new technique for making cube corner elements that involves end milling is used in the fabrication of cube corner elements having non-orthogonal dihedral angles and dihedral angle errors, and arrays of such cube corner elements. A given optical face of a cube corner element may be a compound face with two constituent faces. In some cases, the constituent faces may be parallel and coplanar such that a given dihedral angle error pertains to the entire optical face, while in other cases, the two constituent faces may not be parallel, and may be associated with different dihedral angle errors.

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.