Field emitting apparatus and method
AssigneeKabushiki Kaisha Y.Y.L.
InventorSataro Yamaguchi
Life of this patent
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Abstract
An apparatus and method which enhances the electron emission efficiency in a field emission apparatus having carbon nanotube(s) in a cathode as an electron emitting material. In a field emission apparatus having carbonanotube(s) as an electron emitting material on a cathode 2, the electron emission efficiency from the carbon nanotube(s) 1 is enhanced by irradiating carbon nanotubes 1 with infrared light.
Claims17
A field emitting apparatus comprising
- a cathode provided with at least one carbon nanotube as an electron emitting material, and
- means for irradiating said at least one carbon nanotube with light.
A field emitting apparatus comprising:
- a bar-like elongated electrically conductive member having a length approximately of ⅓ to ¾ of a wave length of an electromagnetic wave to be irradiated on a cathode as an electron emitting material,
- wherein an electric field of said electromagnetic wave to be irradiated on said electrically conductive member is oriented along a longitudinal axial direction of said electrically conductive member, and electrons are emitted from one end of said cathode.
A method for field emitting electrons comprising:
- applying an electric field to said cathode,
- providing a cathode provided with at least one carbon nanotube, and
- irradiating said carbon nanotubes with light for enhancing emission efficiency of electrons.
A field emission method, wherein comprising:
- providing a cathode comprising a bar-like electrically conductive member having a length which is about ⅓ to about ¾ of wave length of an irradiating electromagnetic wave,
- emitting electrons by applying an electric field to said cathode,
- wherein the electric field of said electromagnetic wave irradiating said electrically conductive member is aligned along a longitudinal axial direction of said electrically conductive member.
A field emitting apparatus comprising:
- a cathode provided with at least one carbon nanotube as an electron emitting material,
- means for irradiating said at least one carbon nanotube with light, and means for accelerating electrons emitted from the cathode along said at least one carbon nanotube.
A method for field emitting electrons comprising:
- applying an electric field to said cathode,
- providing a cathode provided with at least one carbon nanotube,
- irradiating said carbon nanotubes with light for enhancing emission efficiency of electrons, and accelerating electrons emitted from the cathode along said at least one carbon nanotube.
Dependencies are inferred from the claim text.