A wall-sized emissive full-color display with fine plasma tubes using three electrodes is proposed. Each tube has an internal MgO overcoat and a phosphor layer. The experimental display was fabricated and the results will be presented. This method will realize a display with a flexible screen shape and an expandable screen size.

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The ion‐induced secondary‐electron‐emission yield of MgO films by the ion gun method was successfully measured. Variations due to crystal orientation and ion kinetic energy were observed. Ejected electron energy showed correlation with the ionization energy of the gas.

The plasma tube array display presents the wall size display with very high luminous efficacy. Discharging in plasma tube was observed to estimate the structure for high luminous efficacy. From the results of the observation, it is estimated that not only the discharge gap but also the discharge cavity effects to the luminous efficacy. With this result new structure was tries and 3.7 lm/W was achieved as the luminous efficacy.