Image screen for use in cathode ray tube has shape matching line on end section with shape matching line

摘要

The device has a front section for displaying images, an end section extending from a periphery of the front section and with a sealing edge on a cone in a sealed manner and a round section joining these two sections. The height of a shape matching line on the end section is greater than 0 and less than or equal to 0.47 times the distance between a first plane through the sealing edge and a second plane through a center of the front section. The device has a front section (21) for displaying images whose mean outer radius of curvature (R) is equal to or greater than 10000 mm., an end section (23) extending from a periphery of the front section and with a sealing edge (22) arranged on a cone in a sealed manner and a round section (24) joining the end and front sections. A shape matching line (25) is arranged on the end section so that a shape matching line height (H1) is greater than 0 and less than or equal to 0.47 times the distance (H) between a first plane through the sealing edge and a second plane through a center of the front section.