Plasma display panel having barrier walls with base portions and protruding portions

A plasma display panel comprising:

• a first substrate and a second substrate facing each other;
• a plurality of horizontal barrier ribs on the second substrate between the first substrate and the second substrate forming a plurality of main discharge spaces and a plurality of stepped discharge spaces along a stepped surface of the barrier ribs;
• a plurality of vertical barrier ribs crossing the horizontal barrier ribs to define a plurality of display cells comprising the main discharge spaces and stepped discharge spaces;
• pairs of scan electrodes and sustain electrodes extending on the first substrate, the scan electrodes at locations overlapping with or adjacent to the stepped discharge spaces, the scan electrodes each comprising a transparent scan electrode and an opaque scan bus electrode disposed on said transparent scan electrode, and the sustain electrodes each comprising a transparent sustain electrode and an opaque sustain bus electrode disposed on said transparent sustain electrode, such that the scan and sustain bus electrodes are adjacent to each other and centrally disposed within the main discharge space, a distance Lb between respective outer ends, furthest from a center of the main discharge space, of the bus electrodes, having a relationship of La−Lb>10 μm, where La is a distance between the base portions disposed on either side of the main discharge space;
• a plurality of address electrodes for generating address discharges together with the scan electrodes;
• a plurality of phosphor layers respectively in the main discharge spaces and the stepped discharge spaces;
• and
• a discharge gas in the main discharge spaces and the stepped discharge spaces.

A plasma display panel comprising:

• a front substrate and a rear substrate that face each other;
• a barrier wall, disposed on the rear substrate, comprising base portions arranged on either side of a main discharge space and protruding portions protruding on the base portions, and defining stepped spaces on either side of the main discharge space, wherein the stepped spaces are formed according to stepped surfaces formed by the base portions and the protruding portions;
• a pair of electrodes disposed on the front substrate, the pair of electrodes comprising a scan electrode and a sustain electrode comprising a pair of bus electrodes centrally disposed in the main discharge space and a pair of transparent electrodes extending, respectively, from the bus electrodes toward the stepped spaces on either side of the main discharge space, a distance Lb between respective outer ends of the bus electrodes, which make a pair, having a relationship of La−Lb>10 μm, where La is a distance between the base portions disposed on either side of the main discharge space;
• an address electrode disposed on the rear substrate, the address electrode being elongated to cross an elongation direction of the scan electrode, the address electrode generating, together with the scan electrode, an address discharge;
• a phosphor layer formed across the main discharge space and the stepped spaces;
• and
• a discharge gas filled in the main discharge space and the stepped spaces.