Electron-emitting device, electron-emitting apparatus, image display apparatus, and light-emitting apparatus
AssigneeCanon Kabushiki Kaisha
InventorTakeo Tsukamoto
Life of this patent
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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.
Claims5
An electron-emitting apparatus comprising:
- (a) an anode electrode;
- (b) a cathode electrode and a gate electrode, which are arranged at an interval so as not to be overlapped with each other, directly on a flat surface of an insulating substrate opposed to said anode electrode;
- and
- (c) a plurality of carbon fibers, arranged on said cathode electrode and connected electrically to said cathode electrode,
- wherein each of said carbon fibers has a plurality of graphenes which are aligned so as not to be parallel to an axis-direction of said fiber, and
- wherein said graphenes are stacked in said axis-direction.
Dependencies are inferred from the claim text.