| 摘要 |
PURPOSE: To reduce the curve in a horizontal direction of a raster depending on a beam current. CONSTITUTION: A left-and-right switching transistor Q1 is connected between a fly-back transformer primary winding W1 and a horizontal deflection output transistor circuit 100 and retrace energy for performing the left-and-right modulation of a deflection current amplitude required for left-and-right pin cushion raster correction is controlled. The left-and-right switching transistor separates a retrace resonance circuit 100 provided with a horizontal deflection winding LH from a fly-back resonance circuit 251 provided with a fly-back transformer T1 in a part of retrace. The deflection winding is connected to a common conductor so as to synchronize the deflection current with video signals by using a retrace voltage sample appearing in it. By the constitution, the phase modulation of the deflection current as the function of the beam current appearing as beam current dependent horizontal image shift, that is the curve in the horizontal direction of the raster, is reduced. |
