TH32776EX - Methods and equipment for improving the vertical contrast of the picture tube. - Google Patents

Abstract

Large television picture tubes must produce a high value brightness in order to be acceptable to the user. This results in a high electron current in the image brightness area and the subsequent defocusing of the point occurring on the monitor, and causes a loss of sharpness in the vertical and horizontal transition regions. The apparent sharpness of the vertical transition is increased by agreeing the pouring of the TV set in such a way that at the vertical transition, the line on the free side of the transition is sidelined from the transition. For better benefit, the amount of vertical scan modulation corresponding to the multi-level control signal depends on the gray level of the transition period.

Claims (1)

1. Methods for improving the quality of the displayed image with the line structure on the tube. Where, for the line segment where the vertical brightness shift (25) is further deflected (57,77,97) in the vertical direction, it is characterized by In order to compensate for the reduction in image resolution caused by the diameter of the mega point depending on the brightness on a large format lamp. The amount of such additional deviations depends on the variation in brightness over time. Such transitions, and are unique, are