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US5402041A Expired / Lapsed US ⏱️ 0.0 years remaining

Field emission cathode

Assignee: Futaba Corp
•
Filing: 1993-03-26
•
Granted: 1995-03-28
•
Expires: 2013-03-26
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Abstract

Abstract A field emission cathode capable of permitting a display to be carried out at increased density and a circuit incorporated therein together with an FEC to exhibit satisfactory characteristics and being driven according to a static drive system. A plurality of control lines and data wires are arranged in a matrix-like manner on a monocrystalline Si substrate, to thereby form element regions on the substrate. The element regions each are formed therein with a circuit element, on which a field emission section is laminated. The circuit elements each include a first transistor connected to both data wire and control wire and functioning as a switching element, a capacitor serving as a circuit for storing therein a signal input thereto, and a second transistor for amplifying a signal input thereto and feeding it to the field emission section.

Inventors

  • 👤 Takao Kishino
  • 👤 Koichi Nishiuchi
  • 👤 Shigeo Itoh

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 13:53
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/304; H01J1/3042; G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; G09G2300/00; G09G2300/08; G09G2300/0809; G09G2300/0842; H01J2201/00; H01J2201/30; H01J2201/319

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 103 words
A field emission cathode comprising: a monocrystalline Si substrate; matrix-like wirings constructed of a plurality of wirings laminatedly formed on said Si substrate so as to extend in each of two directions perpendicular to each other; circuit elements respectively formed in a plurality of element regions defined on .said Si substrate by said matrix-like wirings and each including a switching element and a storage circuit; said circuit elements being connected at an input section thereof to said matrix-like wirings; and field emission sections each formed in each of said element regions and connected to an output section of each of said circuit elements.
Claim 2
Dependent Claim 103 words
A field emission cathode comprising: a monocrystalline Si substrate; matrix-like wirings constructed of a plurality of wirings laminatedly formed on said Si substrate so as to extend in each of two directions perpendicular to each other; circuit elements respectively formed in a plurality of element regions defined on .said Si substrate by said matrix-like wirings and each including a switching element and a storage circuit; said circuit elements being connected at an input section thereof to said matrix-like wirings; and field emission sections each formed in each of said element regions and connected to an output section of each of said circuit elements.
Claim 3
Dependent Claim 68 words
A field emission cathode as defined in claim 1, wherein said switching element is connected to said matrix-like wirings and said storage circuit is constructed so as to store therein a signal input thereto by means of said switching element; and each of said circuit elements further includes a drive circuit for amplifying the signal stored in said storage circuit and feeding it to said field emission section.
Claim 4
Dependent Claim 23 words
A field emission cathode as defined in claim 1, further comprising a drive circuit arranged on a peripheral region of said Si substrate.

References Cited (Backward Citations)

US3500102A Cited
US3581148A Cited
US3622828A Cited
US3755704A Cited
US4908539A Cited
US4904895A Cited
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US5189341A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1998-03-27 1998-09-26 1999-03-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2002-03-27 2002-09-26 2003-03-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2006-03-27 2006-09-26 2007-03-28 $7700.00 Window Closed / Lapsed

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