Patent Number: 6,294,884

Title: Vertical deflection circuit and color picture tube apparatus

Abstract: A vertical deflection circuit for a color picture tube apparatus, whichreduces a white horizontal belt-like area that appears near verticalcenter of a color picture tube screen, caused by the operation of aconvergence correction circuit using switching characteristics of a diode.The circuit comprises a vertical deflection yoke and a vertical linearitycorrection circuit connected to the vertical deflection yoke. The verticaldeflection yoke has a vertical deflection coil, a convergence correctioncircuit using a diode as a switch, and a vertical coma aberrationcorrection coil. An impedance of the vertical linearity correction circuitvaries within a range where a vertical deflection current is in thevicinity of 0 A so as to reduce an impedance of the vertical deflectioncircuit.

Inventors: Uchida; Yukio (Osaka, JP), Iwamoto; Tomoaki (Osaka, JP)


International Classification:

Expiration Date: 09/25/2013