Abstract: A CRT display including a display panel having a substantially flat outside surface, and an inside surface with a substantially fixed curvature includes a film coating with a non-uniform transmissivity. The film coating's transmissivity is varied, as a function of position, to compensate for variations in transmissivity exhibited by the display panel, thus resulting in substantially uniform image brightness across the surface of the CRT.

Abstract: Disclosed is a wire-type corona charger having a wire electrode disposed between ground electrode plates. The wire electrode is supported by the ends of the plurality of wire electrode supporters which are so arranged that their ends have a curvature equal to arcuately-shaped upper edge of the ground electrode plates. The curvature coincides with one of the curvatures of the horizontal axis and the vertical axis of the interior surface of the panel faceplate, while the charger is pivoted along the other curvature of the faceplate. The charger can uniformly charge the photoconductive layer and improves the charging efficiency.