| 摘要 |
PURPOSE: A flyback transformer is provided to reduce the size of the transformer and manufacturing costs and procedures, while allowing the position of leading out a focus voltage to be changed in a simple way. CONSTITUTION: A flyback transformer comprises a horizontal output unit for receiving a horizontal synchronization pulse and generating a saw tooth wave; a low voltage bobbin(10a) wound with a low voltage coil serving as a primary coil; a high voltage bobbin(10) wound with a high voltage coil serving as a secondary coil, wherein the high voltage bobbin has a plurality of high voltage rectifier diodes connected between the upper and lower terminal pins so as to output a high voltage; a focus pack(31) embedded with a printed circuit board molded with an insulating resin, wherein the focus pack has a focus input terminal; a bleeder resistor(32) fixed at the high voltage bobbin, wherein the bleeder resistor has an upper end electrically connected to an upper terminal pin and a lower end electrically connected to the focus input terminal; and a focus lead-out coil(2) having an end connected to the upper terminal pin and the other end connected to the lower end of the bleeder resistor, wherein the focus lead-out coil is interposed between the first high voltage coil layer and the final high voltage coil layer.
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