Luminescent screens for flat image display devices

摘要

A luminescent screen for flat image display devices, having improved light efficiency comprises a perforated plate (5) positioned on the inside of a luminescent screen glass (1), with the plate holes (6) extending above the individual spaced-apart luminescent areas or phosphor dots and the hole walls (6a) being provided with a metallization layer (8) and/or an extension of the luminescent layer (7) on the glass screen (1). In preferred embodiments, the plate holes are etched so that each hole is enlarged toward the front of the screen and the walls thereof assumes at least an approximately parabolical shape opening toward the glass screen and such angular walls are at least partially coated with a metal layer and/or a luminescent material layer for further improved light efficiency (FIG. 4).