Abstract: In an electrophotographic process for manufacturing a luminescent screen assembly on an interior surface of a faceplate panel of a CRT, the panel is first coated with a conductive layer and then overcoated with a photoconductive layer. A substantially uniform charge is established on the photoconductive layer. Selected areas of the photoconductive layer are exposed to actinic radiation, through a shadow mask, to affect the charge on the layer. The unexposed areas of the photoconductive layer are developed with triboelectrically-charged, dry-powdered, light-absorptive screen structure material. The photoconductive layer is reexposed to further discharge those open areas free of the light absorptive material while retaining the charge on those areas having light absorptive matrix material thereon. The reexposure increases the voltage contrast between the exposed and the unexposed areas of the photoconductive layer.

Abstract: In a display device having an evacuated envelope, an electron beam guide and an electron generating means for generating beams of electrons, a modulator structure on which is disposed a plurality of control electrodes may be formed by interconnecting selected ones of the control electrodes which operate at a common potential. This interconnected electrode structure decreases the number of control electrodes which extend from the evacuated envelope. The electron generating means is shielded from the interconnected electrode structure to prevent perturbation of the generated electron beams.

Abstract: In a display device a modulator structure may be formed by disposing on a surface of the back wall a plurality of first control electrodes. A modulator member having a smoothly continuous surface has disposed thereon a plurality of second control electrodes. The surfaces of the back wall and the top member having the electrodes thereon are joined together to form opposing pairs of control electrodes.