Filter for plasma display panel

A plasma display panel display unit comprising:

• a plasma display panel having a front display glass portion;
• a transparent adhesive layer;
• and
• a filter stuck on said front display glass portion of said plasma display panel through said transparent adhesive layer, said filter comprising:
• a transparent film base;
• a first metallic oxide film laminated on said transparent film base;
• a silver transparent electric-conductor film laminated on said transparent, wherein a laminate unit of said first metallic oxide film and said silver transparent electric-conductor film is successively laminated unit by unit in a number of n units (3≦n≦10);
• and
• a second metallic oxide film formed on a plurality of said laminate units with the number of n;
• wherein each metallic oxide film has optical transparency of a refractive index of 1.5 to 2.7, and each silver transparent electric-conductor film has a thickness set substantially to a fixed value in a range of from 5 to 20 nm, and
• wherein one of said first metallic oxide films put directly on the surface of said transparent film base and said second metallic oxide film respectively has a thickness 5/2 (1±0.15) times as large as the thickness of said silver transparent electric-conductor film, and each of other said first metallic oxide films located halfway between said one first metallic oxide film put directly on the surface of said transparent film base and said second metallic oxide film respectively has a thickness 5 (1±0.15) times as large as the thickness of said silver transparent electric-conductor film.

A plasma display panel display unit comprising:

• a plasma display panel;
• a transparent molded body being attached on a surface of said plasma display panel through an air layer;
• a transparent adhesive layer;
• and
• a filter stuck through said transparent adhesive layer, onto a second surface of said transparent molded body being opposite to a first surface of said transparent molded body on which said plasma display unit is attached, said filter comprising:
• a transparent film base;
• a first metallic oxide film laminated on said transparent film base;
• a silver transparent electric-conductor film laminated on said transparent, wherein a laminate unit of said first metallic oxide film and said silver transparent electric-conductor film is successively laminated unit by unit in a number of n units (3≦n≦10);
• and
• a second metallic oxide film formed on a plurality of said laminate units with the number of n;
• wherein each metallic oxide film has optical transparency of a refractive index of 1.5 to 2.7, and each silver transparent electric-conductor film has a thickness set substantially to a fixed value in a range of from 5 to 20 nm, and
• wherein one of said first metallic oxide films put directly on the surface of said transparent film base and said second metallic oxide film respectively has a thickness 5/2 (1±0.15) times as large as the thickness of said silver transparent electric-conductor film, and each of other said first metallic oxide films located halfway between said one first metallic oxide film put directly on the surface of said transparent film base and said second metallic oxide film respectively has a thickness 5 (1±0.15) times as large as the thickness of said silver transparent electric-conductor film.