| 摘要 |
PROBLEM TO BE SOLVED: To stabilize the power supply from a power source section without making the constitution of the section complicated. SOLUTION: An internal power source 41 supplies a DC voltage VIN and a DC current IIN supplied from the external power source of a driving circuit to the primary winding of an FBT 42 after converting the voltage and current into a prescribed DC voltage VFBT and a prescribed current IFBT. The FBT 42 generates various kinds of voltages and currents which are required for driving a cathode-ray tube on its secondary winding L2 side by boosting the voltage impressed upon the primary winding L1. The circuit elements which are supplied with the voltages and currents generated on the secondary winding L2 side of the FBT 42 become load elements and cause loads to be generated on the secondary winding L2 side of the FBT 42. The individual voltages and currents supplied to the load elements fluctuate in accordance with the variation of the signal level of video signals SV inputted to the driving circuit, but the sum total of the load fluctuation of all load elements is fixed. |
