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:
Sep. 10, 2013
Filed:
Feb. 18, 2011
Richard F. M. Smith, Upland, CA (US);
Richard H. Cockrum, Upland, CA (US);
James S. Kang, Rancho Cucamonga, CA (US);
Phyllis R. Nelson, Mt Baldy, CA (US);
Richard F. M. Smith, Upland, CA (US);
Richard H. Cockrum, Upland, CA (US);
James S. Kang, Rancho Cucamonga, CA (US);
Phyllis R. Nelson, Mt Baldy, CA (US);
Cal Poly Pomona Foundation, Inc, Pomona, CA (US);
Abstract
The present invention consists of a power supply and LED circuit arrangement for powering LED arrays such that single or multiple LED failures will have minimal affect on the utility of the LED array. The power supply consists of an analog or microcontroller-based feedback module with single/multiple feedback signals in series with a synchronous buck-boost converter followed by an optional filter and a LED array. The assembly utilizes the feedback signal, to modulate various parameters of the LED array, such as the output intensity, LED junction temperature, and chromaticity. The power supply can drive different circuit arrangements of LEDs including series, parallel, and combinations thereof. Typical feedback signals include LED current, temperature, and ambient luminance and contrast.