MANUFACTURING METHOD FOR PHOSPHOR SCREEN OF DISPLAY TUBE

摘要

The invention relates to a method for drying the inside of a CRT-panel after flow coating of, for example, the phosphors while using convection drying with air. The method of the invention is characterized in that the airflow is forced to the corners of the CRT panel, so that the corners are dried much faster. The crux of the invention is the use of a so-called co-rotating barrier plate which covers the CRT-panel and forces the airflow into the corners of the panel. Furthermore, the air used for the drying process can be conditioned on temperature (higher temperature yields afaster evaporation) and on relative humidity (lowering the relative humidity increases the evaporation). The conventional drying of CRT panels is carried out using IR heating elements. In this process especially the corners of the CRT panel take a very long time to dry.