Gas discharge display apparatus

A gas discharge display apparatus comprising a pair of substrates facing each other across a discharge space;

• row electrode pairs and column electrodes which are placed between the pair of substrates, each row electrode pair and each column electrode being positioned at distance from each other and extending in directions at right angles to each other to form unit light emission areas in positions corresponding to the intersections in the discharge space;
• a dielectric layer overlying the row electrode pairs;
• a protective layer overlying the dielectric layer and facing the unit light emission areas;
• and red, green and blue colored phosphor layers that generate visible light by being excited by vacuum ultraviolet light, wherein
• the discharge space is filled with a discharge gas,
• the protective layer includes a magnesium oxide crystal that has a crystalline structure causing a cathode-luminescence emission having a peak within a wavelength range of 200 nm to 300 nm upon excitation by electron beams, and
• at least one phosphor layer of the red, green and blue colored phosphor layers includes a phosphor made by mixing together a first phosphor and a second phosphor generating lower amounts of reduction gas and carbonization gas than that generated by the first phosphor.