Field emitting device and display apparatus having the same

A display apparatus comprising:

• a field emitting device including a base substrate and a plurality of light emitting units arranged on the base substrate and successively operated to respectively emit one of at least three lights having different wavelengths from each other;
• and
• a display panel including a pixel that controls a transmittance of the lights successively provided to display an image, wherein each of the light emitting units comprises:
• a first electrode arranged on the base substrate;
• a field emitter arranged on the first electrode to emit an electron beam;
• an insulating layer arranged on the first electrode and including an opening to expose the field emitter;
• a second electrode arranged on the insulating layer to control an operation of the field emitter;
• a third electrode facing the first electrode and spaced apart from the first electrode to accelerate the electron beam emitted from the field emitter;
• and
• a fluorescent layer arranged on a surface of the third electrode facing the first electrode and colliding with the electron beam to output the light,
• wherein a transmissive area through which the electron beam is transmitted is located between the florescent layers and the third electrodes of two adjacent light emitting units to form a plurality of florescent layer parts and plurality of third electrode parts, and
• wherein at least two of the third electrode parts overlap with the florescent layer parts configured to emit a same color light and the at least two third electrode parts are electrically connected to one another.

A field emitting device comprising:

• a base substrate;
• a cathode electrode arranged on the base substrate;
• first, second, and third field emitters arranged on the first electrode, the field emitters being distinct from on another;
• first and second insulating sections arranged on the first electrode, the first insulating section located between the first and second field emitters and the second insulating section located between second and third field emitters;
• first and second gate electrodes located on the first insulating section, the first and second gate electrodes spaced apart from one another at opposite edges of the first insulating section;
• third and fourth gate electrodes located on the second insulating section, the third and fourth gate electrodes spaced apart from one another at opposite edges of the second insulating section;
• an anode electrode facing the cathode electrode and spaced apart from the first electrode, wherein the anode electrode comprises first, second, and third anode electrodes;
• a first fluorescent layer arranged on a surface of the anode electrode facing the cathode electrode to overlap the first field emitter and extend up to the right most edge of the first gate electrode;
• a second fluorescent layer arranged on a surface of the anode electrode facing the cathode electrode to overlap the second field emitter and extend from the left most edge of the second gate electrode to the rightmost edge of the third gate electrode;
• and
• a third fluorescent layer arranged on a surface of the anode electrode facing the cathode electrode to overlap the third field emitter and extend to the left most edge of the fourth gate electrode, wherein each of the fluorescent layers are configured to output light of a different wavelength,
• wherein a first transmissive area is located between the first and second fluorescent layers and the first and second anode electrodes,
• wherein a second transmissive area is located between the second and third fluorescent layers and the second and third anode electrodes,
• wherein edges of the first and second anode electrodes contact the first transmissive area, and
• wherein edges of the second and third anode electrodes contact the second transmissive area.