| 摘要 |
The invention relates to a television receiver, in particular a projection television receiver having red, green and blue monochromatic picture tubes, the images of which are projected onto a picture screen. Each picture tube is assigned a correction device comprising a convergence circuit. The convergence circuit is assigned a memory in which correction values for the convergence correction of the three picture tubes are stored. In accordance with the correction values, the convergence circuit generates control signals, which are output to at least one correction coil where each correction coil has one driver circuit. A correction current is applied to the associated correction coil to correct image defects visible on each picture tube. The convergence circuit has control arrangement where the output signals coupled to the correction devices can be influenced in such a way that the same correction is always effected on the picture screen for a specific correction value, independently of the gain of the respective driver circuit. The invention also relates to a method for determining the control signal.
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