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:
Aug. 17, 2010
Filed:
Jan. 12, 2007
Dilip S, Saratoga, CA (US);
Gurjit Thandi, San Jose, CA (US);
Hendrik Santo, San Jose, CA (US);
Kien Vi, Palo Alto, CA (US);
Dilip S, Saratoga, CA (US);
Gurjit Thandi, San Jose, CA (US);
Hendrik Santo, San Jose, CA (US);
Kien Vi, Palo Alto, CA (US);
mSilica, Incorporated, Santa Clara, CA (US);
Abstract
The present invention relates to displays that use LED strings for backlighting. A lead string is provided with continuous drive voltage and the non-lead strings are provided with pulsed drive pulses. The string having the highest forward voltage is selected as the lead string. Feedback information indicative of the currents flowing through the non-lead strings is used to determine the duty cycles of the voltage pulses provided to drive the non-lead strings. The non-lead strings are controlled using pulsed drive voltages to minimize power dissipation in the circuit.