Patent US1947732A successfully refreshed from Google Patents.
Patent US5404074A successfully refreshed from Google Patents.
US5404074A
Expired / Lapsed
US
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Image display
Assignee: Sony Corp
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Filing: 1993-06-16
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Granted: 1995-04-04
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Expires: 2013-06-16
Abstract
Abstract An image display comprises a plurality of picture elements arranged in a matrix and each connected to a switching thin film transistor and a capacitor. The switching thin film transistor is controlled to drive the corresponding picture element. The image display is capable of areal luminance and of displaying images in a satisfactorily high brightness.
Inventors
- 👤 Hidetoshi Watanabe
- 👤 Toshio Ohoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:08
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/481; 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; H01J2201/00; H01J2201/30; H01J2201/319
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
In an image display comprising a plurality of picture elements arranged in a matrix, each picture element comprising a light emitting material on an anode, and a plurality of micro cold cathodes for emitting a beam of electrons for striking the light emitting material to cause the material to emit light, the improvements comprising means for increasing a duration of the luminescence in the display, said means comprising the plurality of micro cold cathodes being driven by a switching thin film transistor and being connected in parallel to a capacitor.
Claim 2
Dependent Claim
90 words
In an image display comprising a plurality of picture elements arranged in a matrix, each picture element comprising a light emitting material on an anode, and a plurality of micro cold cathodes for emitting a beam of electrons for striking the light emitting material to cause the material to emit light, the improvements comprising means for increasing a duration of the luminescence in the display, said means comprising the plurality of micro cold cathodes being driven by a switching thin film transistor and being connected in parallel to a capacitor.
Claim 3
Dependent Claim
40 words
In an image device according to claim 1, wherein each picture element includes a gate electrode being insulated by a layer of material from the plurality of micro cold cathodes, said gate electrode being connected in series with the capacitor.
Claim 4
Dependent Claim
95 words
In an image display comprising a plurality of picture elements arranged in a matrix, each picture element comprising a light emitting material on an anode, and a plurality of micro cold cathodes for emitting a beam of electrons for striking the light emitting material to cause the material to emit light, the improvements comprising means for increasing a duration of the luminescence in the display, said means comprising the plurality of micro cold cathodes of each picture element being driven by a single switching thin film transistor and being connected in parallel to a capacitor.
Claim 5
Dependent Claim
95 words
In an image display comprising a plurality of picture elements arranged in a matrix, each picture element comprising a light emitting material on an anode, and a plurality of micro cold cathodes for emitting a beam of electrons for striking the light emitting material to cause the material to emit light, the improvements comprising means for increasing a duration of the luminescence in the display, said means comprising the plurality of micro cold cathodes of each picture element being driven by a single switching thin film transistor and being connected in parallel to a capacitor.
Claim 6
Dependent Claim
40 words
In an image device according to claim 3, wherein each picture element includes a gate electrode being insulated by a layer of material from the plurality of micro cold cathodes, said gate electrode being connected in series with the capacitor.
Claim 7
Dependent Claim
146 words
In an image display comprising a plurality of picture elements arranged in a matrix, each picture element comprising a light emitting material on an anode, a plurality of micro cold cathodes, and a gate electrode being positioned between the anode and micro cold cathodes and being insulated by a layer of material from the plurality of micro cold cathodes, said gate electrode having an aperture aligned with each micro cold cathode so the cathode can emit a beam of electrons through each aperture for striking the light emitting material to cause the material to emit light, the improvements comprising means for increasing a duration of the luminescence in the display and for suppressing flicker noises therein, said means comprising the plurality of micro cold cathodes of each picture element being driven by a single switching thin film transistor and being connected in parallel to a capacitor.
Claim 8
Dependent Claim
146 words
In an image display comprising a plurality of picture elements arranged in a matrix, each picture element comprising a light emitting material on an anode, a plurality of micro cold cathodes, and a gate electrode being positioned between the anode and micro cold cathodes and being insulated by a layer of material from the plurality of micro cold cathodes, said gate electrode having an aperture aligned with each micro cold cathode so the cathode can emit a beam of electrons through each aperture for striking the light emitting material to cause the material to emit light, the improvements comprising means for increasing a duration of the luminescence in the display and for suppressing flicker noises therein, said means comprising the plurality of micro cold cathodes of each picture element being driven by a single switching thin film transistor and being connected in parallel to a capacitor.
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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) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |