Memory display panel

A display panel comprising

• a gas-filled envelope made up of a base plate and a face plate hermetically sealed together with a space between them and a gas filling in said space,
• a plurality of parallel first electrodes on said base plate and coated with a layer of insulating material to insulate from the gas filling in said envelope,
• a plurality of parallel second electrodes on the surface of said layer of insulating material and disposed transverse to said first electrodes, said second electrodes being in contact with said gas filling,
• a plurality of parallel third electrodes on said face plate, said third electrodes being parallel to said first electrodes,
• a layer of insulating material disposed on said third electrodes and having rows and columns of small apertures which expose portions of said third electrodes, the portions of said third electrodes exposed in said apertures being disposed above and operable with portions of said second electrodes to produce cathode glow when D.C. potentials are connected between selected second and third electrodes,
• said first electrodes including means for applying A.C. sustaining signals thereto for producing visible glow when selected ones of said second and third electrodes glow.