Siemens Aktiengesellschaft

Hans P Lorenz

Rolf Wengert

Manfred Kobale

Helmut Freller

Peter Schack

Kaspar Weingand

Friedrich Horauf

Solder-repelling coating for tools

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).

Luminescent screens for flat image display devices

A luminescent screen for flat image display devices, having improved light efficiency comprises a glass screen (1) provided on its inner surface with a pattern of recesses (2) corresponding to a desired luminescent dot pattern with luminescent dot surfaces (5) positioned not only along the bottom of such recesses but also along the upwardly extending recess walls and a contrasting border layer (3) is positioned on the land areas between each recess. In producing such screens, the contrasting border layer is utilized as an etch mask for the recesses and as an application mask for the luminescent material.

Luminescent screen for flat image display devices

Growing community of inventors

Schwarzenbruck, Germany

Hans P Lorenz