Patent ID: 6326743
Filing Date: 2001-12-04
Classification: H04N

Abstract:
A method of correcting linearity in a horizontal period with a horizontal deflection circuit comprising the steps of:grounding one end of a first parallel circuit formed by connecting a first switching element, a first damper diode, and a first resonance capacitor in parallel;connecting another end of said first parallel circuit to a second parallel circuit formed by connecting a second switching element, a second damper diode and a resonance capacitor in parallel;connecting the first parallel circuit to a direct-current lower source terminal through a primary winding of a fly back transformer;grounding another end of said second parallel circuit through a series circuit of a horizontal deflection coil and an S-curve correction capacitor; andproviding switching element control means for switching said first switching element by a horizontal drive signal, and controlling an OFF start period and an OFF period of said second switching element,wherein a third switching element is provided between both ends of said s-curve correction capacitor, with said third switching element turned on during a horizontal retrace period to discharge said S-curve correction capacitor, and an ON time of said third switching element is controlled to correct linearity in a horizontal period.