Abstract: A plasma display panel comprises: a plurality of substrate having a front substrate and a back substrate disposed opposite to each other; dielectric walls disposed between a front surface and a back surface, and defining discharge cells in cooperation with the front substrate and the back substrate; a plurality of discharge electrodes separately disposed around the discharge cells and buried into the dielectric walls; dummy electrodes formed at outer portions of the discharge electrodes disposed in one direction of the substrate and etched when over-etching takes place during the time of developing; and red, green and blue color fluorescent layers coated within the discharge cells.

Abstract: An organic electroluminescent device induces optical resonance with a simple structure, the organic electroluminescent device including: a transparent substrate; a semi-transparent layer formed on the transparent substrate; a first anode layer formed on the semi-transparent layer as a predetermined pattern; a cathode layer formed of a metallic total reflection layer on the first anode layer; and an organic layer formed between the first anode layer and the cathode layer, which includes at least an emitting layer, wherein an optical distance between a top surface of the semi-transparent layer and a bottom of the cathode layer is determined to be a least integer multiple of half the peak wavelengths of light of a predetermined set of colors. Due to a resonance effect of the organic electroluminescent device, the emission efficiency of wavelengths of light of different colors is improved, and high-purity quality pictures may be displayed on the organic electroluminescent device.