US5448133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat panel field emission display device with a reflector layer
Assignee: Sharp Corp
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Filing: 1994-08-24
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Granted: 1995-09-05
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Expires: 2014-08-24
Abstract
Abstract A flat panel display device comprises an anode electrode, a fluorescent layer formed on the anode electrode, a cathode electrode having a plurality of cold cathodes, a gate electrode spaced from and electrically insulated from the cathode electrode for triggering emission of electrons by the cold cathodes, and a light-reflecting layer formed on or above the gate electrode face to face with the fluorescent layer.
Inventors
- 👤 Tomokazu Ise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:14
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J2201/00; H01J2201/30; H01J2201/319
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
148 words
A flat panel display comprising: an anode electrode having a viewer-side surface and an electron-receiving-side surface; a cathode electrode opposite to said anode electrode through a space, having a plurality of cold cathodes each emitting an electron to said electron-receiving-side surface of said anode electrode; a gate electrode for triggering said emission of said electron from each of said cold cathodes; an insulating layer sandwiched between said cathode electrode and said gate electrode for electrically insulating said cathode electrode from said gate electrode; a fluorescent layer formed on said electron-receiving-side surface of said anode electrode for generating light by a collision of said electron emitted from each of said cold cathodes; and a light-reflecting layer formed on or above said gate electrode for reflecting said light emitted from said fluorescent layer to said viewer side surface of said anode electrode through said fluorescent layer and said anode electrode.
Claim 2
Dependent Claim
148 words
A flat panel display comprising: an anode electrode having a viewer-side surface and an electron-receiving-side surface; a cathode electrode opposite to said anode electrode through a space, having a plurality of cold cathodes each emitting an electron to said electron-receiving-side surface of said anode electrode; a gate electrode for triggering said emission of said electron from each of said cold cathodes; an insulating layer sandwiched between said cathode electrode and said gate electrode for electrically insulating said cathode electrode from said gate electrode; a fluorescent layer formed on said electron-receiving-side surface of said anode electrode for generating light by a collision of said electron emitted from each of said cold cathodes; and a light-reflecting layer formed on or above said gate electrode for reflecting said light emitted from said fluorescent layer to said viewer side surface of said anode electrode through said fluorescent layer and said anode electrode.
Claim 3
Dependent Claim
52 words
A flat panel display according to claim 1, wherein said insulating layer has a plurality of holes formed so as to penetrate through at least said insulating layer and said gate electrode, and each of said cold cathodes being disposed on said cathode electrode as a bottom of each of said holes.
Claim 4
Dependent Claim
28 words
A flat panel display according to claim 2, wherein said light-reflecting layer has a plurality of sloped portions so as to reflect said light at an optimum angle.
Claim 5
Dependent Claim
30 words
A flat panel display according to claim 3, wherein each of said sloped portions includes a cone-shaped surface sloped down toward said hole in which said cold cathode is disposed.
Claim 6
Dependent Claim
31 words
A flat panel display according to any one of claims 1 to 4, wherein said light-reflecting layer is composed of at least one or more metallic film and a dielectric film.
Claim 7
Dependent Claim
30 words
A flat panel display according to any one of claims 1 to 4, wherein said light-reflecting layer is composed of two or more dielectric films having respective indexes of refraction.
Claim 8
Dependent Claim
35 words
A flat panel display according to claim 4, wherein a first film of SiO 2 , a second film of TiO 2 and a third film of SiO 2 are laminated on said sate electrode.
References Cited (Backward Citations)
US3594583A
Cited
USB453031I5
Cited
US4845407A
Cited
US4857799A
Cited
US4924141A
Cited
US4935665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-04 | 1999-03-06 | 1999-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-04 | 2003-03-06 | 2003-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-04 | 2007-03-06 | 2007-09-05 | $7700.00 | Window Closed / Lapsed |