Patent ID: 8334653

Claim:
A plasma display device comprising: a plasma display panel including a first substrate, a second substrate, scan electrodes and sustain electrodes on the first substrate, address electrodes on the second substrate, and barrier ribs on the second substrate on which the address electrodes are located; and a filter disposed at a front surface of the plasma display panel, wherein the filter comprises: an external light shield sheet including a base unit and a plurality of pattern units formed on the base unit and that have a refractive index higher than that of the base unit, wherein each of the scan electrodes and sustain electrodes includes transparent electrodes and bus electrodes, wherein the barrier ribs include a plurality of vertical barrier ribs and a plurality of horizontal barrier ribs, wherein a ratio of a distance between tops of two adjacent pattern units of the plurality of pattern units to a distance between bottoms of the two adjacent pattern units is 1 to 3.25, and wherein a ratio of a bottom width of each of the pattern units to a width of each of the bus electrodes is 0.25 to 0.4, and a ratio of the bottom width of each of the pattern units to a width of each of the vertical barrier ribs is 0.4 to 0.65.