Electron-emitting device, electron-emitting apparatus, image display apparatus, and light-emitting apparatus
AssigneeCanon Kabushiki Kaisha
InventorTakeo Tsukamoto
Life of this patent
Estimating the term…
Abstract
An electron-emitting device in which the specific capacitance and the drive voltage are reduced, and which is capable of obtaining a finer electron beam by controlling the trajectory of emitted electrons. An electron-emitting portion of an electron-emitting member is positioned between the height of a gate and the height of an anode. When the distance between the gate and a cathode is d; the potential difference at driving the device is V1; the distance between the anode and the substrate is H; and the potential difference between the anode and the cathode is V2, then the electric field E1=V1/d during driving is configured to be within the range from 1 to 50 times E2=V2/H.
Claims39
An electron-emitting apparatus comprising:
- A) a first electrode and a second electrode disposed on a surface of a substrate;
- B) first voltage application means for applying to said second electrode a potential higher than a potential applied to said first electrode;
- C) an electron-emitting member disposed on said first electrode;
- D) a third electrode disposed so as to face said substrate, electrons emitted from said electron-emitting member reaching said third electrode;
- and
- E) second voltage-application means for applying to said third electrode a potential higher than each of the potentials applied to said first and second electrodes,
- wherein a surface of said electron-emitting member is placed between a plane containing a surface of said second electrode and substantially parallel to the surface of said substrate and a plane containing a surface of said third electrode and substantially parallel to the surface of said substrate, and
- wherein when the distance between said second electrode and said first electrode is d;
- the potential difference applied between said second electrode and said first electrode by said first voltage application means is V1;
- the distance between said third electrode and said substrate is H;
- and the potential difference between the potential applied to said third electrode by said second voltage application means and the potential applied to said first electrode by said first voltage application means is V2, then an electric field E1=V1/d is within the range from 1 to 50 times an electric field E2=V2/H.
An electron-emitting device comprising:
- A) a fiber containing carbon as a main ingredient;
- and
- B) an electrode for controlling emission of electrodes from said fiber containing carbon as a main ingredient,
- wherein said fiber containing carbon as a main ingredient has a plurality of graphenes layered so as not to be parallel to the axis direction of said fiber.
An electron-emitting apparatus comprising:
- A) a first electrode and a second electrode disposed on a surface of a substrate;
- B) first voltage application means for applying to said second electrode a potential higher than a potential applied to said first electrode;
- C) a plurality of fibers disposed on said first electrode, said fibers containing carbon as a main constituent;
- D) a third electrode disposed so as to face said substrate, electrons emitted from said fibers reaching said third electrode;
- and
- E) second voltage application means for applying to said third electrode a potential higher than each of the potentials applied to said first and second electrodes,
- wherein a surface region of said fibers is placed between a plane containing a surface of said second electrode and substantially parallel to the surface of said substrate and a plane containing a surface of said third electrode and substantially parallel to the surface of said substrate.
An electron-emitting device comprising:
- A) a first electrode and a second electrode disposed on a surface of a substrate, a gap being formed between said first and second electrodes;
- and
- B) a fiber provided on said first electrode, said fiber containing carbon as a main ingredient,
- wherein said second electrode comprises an electrode for controlling emission of electrodes from said fiber containing carbon as a main ingredient, and
- wherein said fiber containing carbon as a main ingredient comprises graphene.
Dependencies are inferred from the claim text.