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:
Mar. 08, 2005
Filed:
Jan. 05, 2001
Matthew R. Perkins, Sunrise, FL (US);
Tzer-hso Lin, Coral Springs, FL (US);
Neal K. Patwari, Fort Lauderdale, FL (US);
Robert J. O'dea, Fort Lauderdale, FL (US);
Matthew R. Perkins, Sunrise, FL (US);
Tzer-Hso Lin, Coral Springs, FL (US);
Neal K. Patwari, Fort Lauderdale, FL (US);
Robert J. O'Dea, Fort Lauderdale, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An optically based location system and method of determining a location at a structure include a lighting infrastructure having lights at a structure. Each light is configured to illuminate and to transmit a respective relative or absolute terrestrial position through modulation of emitted light. An optical receiver is configured to detect the lights, to demodulate the position of detected lights, and to determine from the detection a position of the receiver. The receiver can have a conventional optical detector for determining a two-dimensional position of the receiver relative to a detected light, or can have a three-dimensional spot collimating lens and charged couple device optical detector for determining a three-dimensional position of the receiver relative to a detected light. The receiver and lights can be synchronized for converting a delay time into a distance measurement to calculate a distance between a light and the receiver.