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US 11,195,684 B2Granted
Field emission apparatus with superior structural stability and X-ray tube comprising the same
AssigneeAweXome Ray, Inc.
InventorsHong Soo Choi, Se Hoon Gihm, Sug Chul Kim
Life of this patent
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Abstract
Provided is a field emission apparatus including a pipe-shaped emitter holder comprising an electrically conductive material and a first internal space communicated in a first direction, and an emitter electrode having one or more yarns each having a structure extending in the first direction in which a plurality of CNTs that extend in the first direction are aggregated, and the emitter electrode is inserted in the first internal space while extending in the first direction.
Claims20
A field emission apparatus, comprising:
- a pipe-shaped emitter holder comprising an electrically conductive material and a first internal space communicated in a first direction;
- and
- an emitter electrode comprising one or more yarns each having a structure extending in the first direction in which a plurality of carbon nanotubes (CNTs) that extend in the first direction are aggregated,
- wherein the emitter electrode is inserted in the first internal space of the emitter holder while extending along the first direction,
- wherein the emitter holder comprises a band-shaped first front end, a band-shaped first base end, an inner surface extending in the first direction between an inner periphery of the first front end and an inner periphery of the first base end and defining the first internal space, and an outer surface extending in the first direction between an outer periphery of the first front end and an outer periphery of the first base end,
- wherein the first internal space extends in the first direction from the first front end to the first base end,
- wherein the emitter electrode comprises a second front end and a second base end, and
- wherein, when the first direction is perpendicular to the ground, the second base end is located higher with respect to the ground than the first base end such that a part of the emitter holder is located protruding downward from the second base end.
5 more elements
A field emission apparatus, comprising:
- a pipe-shaped emitter holder comprising an electrically conductive material and a first internal space communicated in a first direction;
- and
- an emitter electrode comprising one or more yarns each having a structure extending in the first direction in which a plurality of carbon nanotubes (CNTs) that extend in the first direction are aggregated,
- wherein the emitter electrode is inserted in the first internal space of the emitter holder while extending along the first direction,
- wherein the emitter holder comprises a band-shaped first front end, a band-shaped first base end, an inner surface extending in the first direction between an inner periphery of the first front end and an inner periphery of the first base end and defining the first internal space, and an outer surface extending in the first direction between an outer periphery of the first front end and an outer periphery of the first base end,
- wherein the first internal space extends in the first direction from the first front end to the first base end,
- wherein the emitter electrode comprises a second front end and a second base end, and;
- wherein, when the first direction is perpendicular to the ground, the first front end comprises:
- an inclination tapered along a circumference of the first front end such that a boundary formed between the outer surface of the emitter holder and the outer periphery of the first front end is located relatively lower than a boundary formed between the inner surface of the emitter holder and the inner periphery of the first front end;
- or
- an inclination tapered along a circumference of the first front end such that a boundary formed between the outer surface of the emitter holder and the outer periphery of the first front end is located relatively higher than a boundary formed between the inner surface of the emitter holder and the inner periphery of the first front end.
8 more elements
A field emission apparatus, comprising:
- a pipe-shaped emitter holder comprising an electrically conductive material and a first internal space communicated in a first direction;
- and
- an emitter electrode comprising one or more yarns each having a structure extending in the first direction in which a plurality of carbon nanotubes (CNTs) that extend in the first direction are aggregated,
- wherein the emitter electrode is inserted in the first internal space of the emitter holder while extending along the first direction,
- wherein the emitter holder comprises a band-shaped first front end, a band-shaped first base end, an inner surface extending in the first direction between an inner periphery of the first front end and an inner periphery of the first base end and defining the first internal space, and an outer surface extending in the first direction between an outer periphery of the first front end and an outer periphery of the first base end,
- wherein the first internal space extends in the first direction from the first front end to the first base end,
- wherein the emitter electrode comprises a second front end and a second base end, and
- wherein, when the first direction is perpendicular to the ground, the first front end is located at the same height as the second front end.
5 more elements
Dependencies are inferred from the claim text.