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:
Feb. 24, 2009
Filed:
Jun. 03, 2004
Xiaohong Sun, Briarcliff Manor, NY (US);
Demetri J. Giannopoulos, Norwalk, CT (US);
Xiaohong Sun, Briarcliff Manor, NY (US);
Demetri J. Giannopoulos, Norwalk, CT (US);
Koninklijke Philips Electronics, N.V., Eindhoven, NL;
Abstract
A LED system () for illumination and data transmission employs a LED driver (), an electronic switch (), and an illumination unit (). In a first illumination state, illumination unit () receives LED current(s) from LED driver () to emit a first light output. In a second illumination state, the illumination unit () receives additional LED current(s) from LED drivervia the electronic switch as controlled by the LED driver where the illumination unit () additionally emits a second light output. LED system () optically communicates a data bit with each transition of the illumination unit () from the first illumination state to the second illumination state, and vice-versa.