Patent ID: 8288961

Claim:
A LED backlight driving module for driving a plurality of LED light bars, comprising: a main power stage generating a power signal; a first stage isolation transformer unit coupled to the main power stage for receiving the power signal and outputting a first driving signal; a second stage isolation transformer unit having a plurality of second power isolation transformers, wherein primary windings of the second power isolation transformers are interconnected in series, and first secondary-windings of the first stage isolation transformer unit and the second stage isolation transformer unit are connected in parallel, and a secondary winding of the second power isolation transformer generates a second driving signal corresponding to the first driving signal; and a plurality of output rectifiers and filters individually coupled to the secondary winding of the corresponding second power isolation transformer to perform rectification and filtering on the corresponding second driving signal to drive the correspondingly coupled LED light bars; wherein the first stage isolation transformer unit is composed of a plurality of first power isolation transformers, and primary windings of the first power isolation transformers are connected in series so that the first driving signals of a same current value are induced on secondary windings of the first power isolation transformers respectively corresponding to the primary windings of the first isolation transformers.