Flat tube display apparatus

A flat tube display apparatus comprising a vacuum tube body having housed therein (a) at least one electron source for emitting electron beams;

• (b) electron beam focusing means for focusing electron beams emitted from said electron source;
• (c) a florescent display screen having a plurality of horizontal picture elements and a florescent surface onto which said electron beams focused by said focusing means are adapted to land;
• (d) a plurality of side walls supporting said display screen and each having two side surfaces, said side walls extending across an entire length of said display screen in a travel direction of said electron beams and defining therebetween a plurality of paths which extend parallel to said florescent surface of said display screen and along which said electron beams travel, respectively, in parallel with said display screen;
• (e) guide means formed of magnetic films or a magnetic material disposed on said side surfaces of said side walls so as to extend along said paths, being periodically magnetized at intervals along said paths so as to guide said electron beams along said paths;
• and (f) means for deflecting said electron beams guided by said guide means at selected positions so as to direct said electron beams toward said display screen, wherein said electron beam guide means comprises at least frit glass and magnetic powder.

A flat tube display apparatus comprising a vacuum tube body having housed therein (a) at least one electron source for emitting electron beams;

• (b) electron beam focusing means for focusing electron beams emitted from said electron source;
• (c) a florescent display screen having a plurality of horizontal picture elements and a florescent surface onto which said electron beams focused by said focusing means are adapted to land;
• (d) a plurality of side walls supporting said display screen and each having two side surfaces, said side walls extending across an entire length of said display screen in a travel direction of said electron beams and defining therebetween a plurality of paths which extend parallel to said florescent surface of said display screen and along which said electron beams travel, respectively, in parallel with said display screen;
• (e) guide means formed of magnetic films or a magnetic material disposed on said side surfaces of said side walls so as to extend along said paths, being periodically magnetized at intervals along said paths so as to guide said electron beams along said paths;
• and (f) means for deflecting said electron beams guided by said guide means at selected positions so as to direct said electron beams toward said display screen, wherein said electron beam guide means comprises at least frit glass and magnetic powder, wherein said magnetic powder contains at least barium ferrite or strontium ferrite.