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:
Dec. 17, 2013
Filed:
Jul. 15, 2011
Ming Xu, Nanjing, CN;
Shaobin Zhang, Shaanxi Province, CN;
Ming Xu, Nanjing, CN;
Shaobin Zhang, Shaanxi Province, CN;
FSP-Powerland Technology Inc., Nanjing, CN;
FSP Technology Inc., Taoyuan County, TW;
Abstract
An LED backlight driving circuit including a boost circuit and a transformer current balance circuit is provided. The boost circuit provides a total current for n LED strings, and the transformer current balance circuit is coupled to the LED strings and includes n−1 transformers. A first LED current-balance-circuit (CBC) includes a switching-transistor connected to a secondary-winding of a first-transformer, and an nLED CBC includes a switching-transistor connected to a primary-winding of an (n−1)transformer. An i(1<i<n, n>2) LED CBC includes a switching-transistor sequentially connected to a primary-winding of an (i−1)transformer and a secondary-winding of an itransformer. The passive-transformers are applied in the LED driving circuit to implement current balance/equalization, such that the LED backlight driving circuit is suitable for a system with any odd or even number (greater than 1) of the LED strings connected in parallel, so as to reduce the cost of the system.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile