Patent ID: 7411358

Claim:
An inverter circuit that applies sinusoidal voltages to 2n CCFLs wherein n is a positive integer, the inverter circuit comprising: n first balance transformers each including a primary coil and a secondary coil; and n second balance transformers each including a primary coil and a secondary coil, wherein a first sinusoidal voltage and a second sinusoidal voltage are applied, respectively, to a corresponding first terminal and a corresponding second terminal of each of the 2n CCFLs, the first sinusoidal voltage being substantially opposite in polarity to the second sinusoidal voltage; each respective primary coil of the n first balance transformers is connected in series with a corresponding first terminal of a CCFL included in a first set of n CCFLs from the 2n CCFLs, such that the first sinusoidal voltage is applied to each respective first terminal of the first set of n CCFLs while the second sinusoidal voltage is applied to each respective second terminal of the first set of n CCFLs; each respective primary coil of the n second balance transformers is connected in series with a corresponding first terminal of a CCFL included in a second set of n CCFLs from the 2n CCFLs, such that the second sinusoidal voltage is applied to each respective first terminal of the second set of n CCFLs while the first sinusoidal voltage is applied to each respective second terminal of the second set of n CCFLs; wherein the first set of n CCFLs is mutually exclusive with the second set of n CCFLs; and the secondary coils of the first balance transformers and the secondary coils of the second balance transformers are all connected in series with each other to form a loop.