Patent ID: 6850143

Claim:
A flyback transformer comprising: a core having a flattened substantially circular cross-section; first and second bobbins provided around the core, each of the first and second bobbins having a flattened substantially circular cross-section; a low-voltage winding wound around the first bobbin; and high-voltage winding wound around the second bobbin so as to have a film-layer winding structure; wherein the flattened substantially circular cross-section of said core and said first and second bobbins has a dimensioning longitudinal direction that is greater than a dimension in a width direction; and at least one of a high-voltage capacitor and a high-voltage resistance substrate is connected to an output of the high-voltage winding, the at least one of the high-voltage capacitor and the high-voltage resistance substrate is adjacent to one side of said core and said first and second bobbins along the longitudinal direction of the flattened substantially circular cross-section such that a width dimension of the flyback transformer is not increased.