Patent ID: 7271691

Claim:
A transformer for driving a lamp of a liquid crystal display including a bobbin wound with a coil and a core introduced into the bobbin, said transformer comprising: the bobbin provided with a coil winding part having no protrusion member so as to exclude an interference caused by the protrusion member from a path wound with the coil and a pair of lead pins each extending from opposing ends of the bobbin along opposing directions parallel to a length of the bobbin; and said coil continuously wound starting from one end of the coil winding part and terminating at another end thereof and connected to two lead pins at a primary side and a secondary side without using a return wire, the coil being continuously wound from one side of the coil winding part to another side thereof, such that a number of windings is periodically increased in the vertical direction, wherein the core includes first and second E-shaped core portions each having centers passing through a center of the bobbin and sidewall portions surrounding sides of the bobbin.