US4633271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical writing device
Assignee: Ricoh Co Ltd
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Filing: 1983-09-08
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Granted: 1986-12-30
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Expires: 2003-09-08
Abstract
Abstract An optical writing device includes a substrate, an array of pixel electrodes, each of which is provided with a luminescent material, a filament electrode disposed in parallel with the array, an enclosure member for enclosing the pixel and filament electrodes and the array, and driver I.C. chips mounted on the substrate. Such a structure may be made extremely compact in size with low cost.
Inventors
- 👤 Hideo Segawa
- 👤 Toshiyuki Inokuchi
- 👤 Takashi Shibaguchi
- 👤 Fumio Asano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:35
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N1/1931; B; B41; B41J; B41J2/00; B41J2/435; B41J2/447; B41J2/4476; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1238; G06K15/1242; G06K15/1247; H04N1/024; H04N1/032; H04N1/036
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
130 words
An optically writing device comprising: a substrate; a plurality of first electrodes provided on said substrate as arranged in the form of an array; a like plurality of light emitting elements each mounted on said plurality of first electrodes, each of said light emitting elements being capable of emitting light by absorbing energy from electrons impinging thereon; a second electrode for emitting electrons disposed spaced apart and not making physical contact with, a predetermined distance away from said substrate and extending generally in parallel with the array of said plurality of first electrode; means for enclosing at least said plurality of light emitting elements and said second electrode; and means mounted on said substrate for driving said plurality of first electrodes selectively in accordance with an image signal supplied thereto.
Claim 2
Dependent Claim
130 words
An optically writing device comprising: a substrate; a plurality of first electrodes provided on said substrate as arranged in the form of an array; a like plurality of light emitting elements each mounted on said plurality of first electrodes, each of said light emitting elements being capable of emitting light by absorbing energy from electrons impinging thereon; a second electrode for emitting electrons disposed spaced apart and not making physical contact with, a predetermined distance away from said substrate and extending generally in parallel with the array of said plurality of first electrode; means for enclosing at least said plurality of light emitting elements and said second electrode; and means mounted on said substrate for driving said plurality of first electrodes selectively in accordance with an image signal supplied thereto.
Claim 3
Dependent Claim
19 words
A device of claim 1 wherein said plurality of light emitting elements are each comprised of a luminescent material.
Claim 4
Dependent Claim
59 words
A device of claim 2 wherein said means for enclosing includes an enclosure member generally in the shape of a trough, said trough-shaped enclosure member being turned upside down and sealingly and fixedly attached to said substrate thereby defining a sealed chamber in which said plurality of first electrodes, said light emitting elements and said second electrode are located.
Claim 5
Dependent Claim
26 words
A device of claim 3 wherein said, enclosure member includes a transparent portion at least partly thereby defining a window to allow passage of light therethrough.
Claim 6
Dependent Claim
15 words
A device of claim 3 wherein said sealed chamber is evacuated to a vacuum state.
Claim 7
Dependent Claim
26 words
A device of claim 1 further comprising an insulating layer formed on said substrate, and said plurality of first electrodes are defined on said insulating layer.
Claim 8
Dependent Claim
31 words
A device of claim 6 wherein said means for driving includes a plurality of leads individually extending from said plurality of first electrodes embedded in said insulating layer at least partly.
Claim 9
Dependent Claim
23 words
A device of claim 1 wherein said means for driving includes an appropriate number of driver I.C. chips as mounted on said substrate.
Claim 10
Dependent Claim
16 words
A device of claim 1 wherein said second electrode is in the form of a filament.
Claim 11
Dependent Claim
30 words
A device of claim 9 further comprising a grid electrode interposed between said substrate and said second electrode and extending generally in parallel with said substrate and said second electrode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |