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:
May. 20, 2003
Filed:
Mar. 31, 2000
Fong-Jei Lin, Saratoga, CA (US);
Shengbo Zhu, San Jose, CA (US);
Other;
Abstract
A traffic signal head uses a plurality of LED light sources mounted in one or more containment volumes in a housing. One version uses identical three-color LED light sources distributed through the containment volume: each source having a red light generating element, a yellow light generating element, and a green light generating element. A second version uses identical two-color LED light sources distributed through the containment volume, each source having a red LED light generating element and a green LED light generating element. For the second version, activation circuitry enables individual activation of the red LED elements to produce red signals, individual activation of the green LED elements to produce green signals, and concurrent activation of both types of LED elements to produce yellow signals. Both versions can be electrically configured to display any of the three colors, as well as special symbols-such as directional arrows.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile