Patent Number: 6,295,100

Title: Method and device for convergence correction in a television receiver

Abstract: A method for convergence correction in a television receiver and to atelevision receiver, in particular a projection television receiver havingin each case one monochromatic picture tube for the three primary colours,red, green and blue, improves the quality of convergence correction. Eachpicture tube is assigned a correction device which comprises a convergencecircuit. The convergence circuit is assigned a memory in which correctionvalues for the convergence correction of the three picture tubes arestored. In accordance with the correction values, the convergence circuitgenerates output signals, which are output to a correction device, whichin each case comprise at least one correction coil and, for eachcorrection coil, one driver circuit. A correction current is applied tothe associated correction coil in order to correct image defects of apicture tube. The convergence circuit also has control means forinfluencing the output signals output to the correction devices in such away that the same correction is always effected on the picture screen fora specific correction value, independently of the gain of the respectivedriver circuit.

Inventors: Carpentier; Dirk (Unterkirnach, DE), Gleim; Gunter (Villingen-Schwenningen, DE), Heizmann; Friedrich (Villingen-Schwenningen, DE), Rekla; Bernd (Villingen-Schwenningen, DE)


International Classification:

Expiration Date: 09/25/2013