A plasma display device having a plasma display panel in which, each display cell contains a magnesium oxide layer including magnesium oxide crystals that are excited by an electron beam to emit cathode luminescence light having a peak in a wavelength range of 200 to 300 nm. The displayed TCR is preferably a heterodimer having a non-native disulfide bond between constant domain residues. The frequency of one of the clocks can be reduced or altered without altering the frequencies at which the other clocks oscillate. The portions of the indicator are configured to represent proportions of content that comes before and after the current location being displayed. A pixel electrode is formed on the passivation layer and connected to the drain electrode.