Field forming electrodes on high voltage spacers

A flat panel apparatus, comprising:

• a faceplate;
• a backplate positioned in an opposing relationship to the faceplate;
• an enclosure member positioned between the backplate and the faceplate to form a sealed envelope therebetween, the sealed envelope including a phosphor coated emissive area of length L.sub.1 ;
• a spacer in the envelope supporting the backplate and the faceplate against forces acting in a direction toward the envelope, the spacer having a selectable potential drop across an exterior surface of the spacer;
• and
• at least one electrode disposed on the spacer extending a length L.sub.2 along a side of the spacer that is at least equal to L.sub.1, the voltage of the electrode being controlled to achieve a desired voltage distribution between the backplate and the faceplate.

A flat panel apparatus, comprising:

• a faceplate;
• a backplate positioned in an opposing relationship to the faceplate and connected in a sealed relationship to create a sealed envelope therebetween, the sealed envelope including a phosphor coated emissive area of length L.sub.1 ;
• a spacer in the envelope supporting the backplate and the faceplate against forces acting in a direction toward the envelope;
• and
• at least two electrodes disposed on the spacer from opposite ends of the spacer which extend a length L.sub.2 along a side of the spacer that is at least equal to 90% of L.sub.1, the voltage of the electrodes being controlled to achieve a desired voltage distribution between the backplate and the faceplate.

A flat panel apparatus, comprising:

• a faceplate;
• a backplate positioned in an opposing relationship to the faceplate;
• an enclosure member positioned between the backplate and the faceplate to form a sealed envelope therebetween;
• a spacer in the envelope supporting the backplate and the faceplate against forces acting in a direction toward the envelope;
• and
• at least one electrode disposed on the spacer formed of a material having a sheet resistance of no greater than about 10.sup.7 .OMEGA./.quadrature..