Field emission device and field emission display

A field emission device comprising:

• an insulating substrate;
• a plurality of row electrodes located on the insulating substrate, spaced from and parallel to each other;
• a plurality of line electrodes located on the insulating substrate, spaced from and parallel to each other, wherein the plurality of row electrodes are set an angle relative to the plurality of line electrodes to form a plurality of cells;
• a plurality of electron emitting units, wherein each of the plurality of electron emitting units is located in one of the plurality of cells and comprises:
• a first electrode;
• a second electrode;
• a cathode emitter;
• and
• a secondary electron emitter spaced from the cathode emitter and having an electron emitting surface, the cathode emitter being oriented toward the secondary electron emitter.

A field emission display comprising:

• a field emission device;
• and
• an anode structure spaced from the field emission device,
• wherein the field emission device comprising:
• an insulating substrate;
• a plurality of row electrodes located on the insulating substrate, spaced from and parallel to each other;
• a plurality of line electrodes located on the insulating substrate, spaced from and parallel to each other, wherein the plurality of row electrodes are set an angle relative to the plurality of line electrodes to form a plurality of cells;
• a plurality of electron emitting units, wherein each of the plurality of electron emitting units is located in one of the plurality of cells and comprises:
• a first electrode;
• a second electrode;
• a cathode emitter;
• and
• a secondary electron emitter spaced from the cathode emitter and having an electron emitting surface, the cathode emitter being oriented toward the secondary electron emitter;
• a first focus electrode located on the first electrode;
• a second focus electrode located on the second electrode.