US3792258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive switching scanner apparatus
Assignee: Individual
•
Filing: 1972-05-03
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Granted: 1974-02-12
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Expires: 1992-05-03
Abstract
Abstract Improved high-speed scanner apparatus including a layer of energy emitting material, a plurality of spaced electrodes arranged adjacent said layer of energy emitting material, and means for sequentially energizing said electrodes to activate corresponding portions of said emissive layer. The invention is characterized in that the means for sequentially energizing the electrodes includes, for each electrode, normally disabled conductor means containing a normally non-conductive photoconductive element, said element being arranged for operation to a conductive enabling condition by the activation of a portion of the energy emitting layer associated with the next preceding electrode. Transfer synchronizing means are provided for supplying stepping pulses to the appropriate electrodes during the conductivity decay period for which the conductor means associated with the respective electrodes are in the enabled condition, whereby extremely rapid, accurately controlled scanning operation is obtained.
Inventors
- 👤 L Sliker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:32
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/78
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
203 words
Scanning apparatus comprising an electroluminescent layer, electrode means on one side of said layer, a series of spaced electrodes on the other side of said electroluminescent layer, a conductor connected to the first electrode of said series of spaced electrodes, means for applying through said conductor a trigger pulse to the first of said spaced electrodes to energize the electroluminescent material between said electrode means and the first of said spaced electrodes, a second conductor including in series a photo conductive element connected to the second of said spaced electrodes and positioned to be rendered conductive by the illuminated portion of said electroluminescent layer upon energization of said first of said spaced electrodes, means for applying a pulse to said second conductor while its photoconductive material is still in conductive condition to energize the second of said spaced electrodes, a third conductor including in series a second photoconductive element connected to the third of said spaced electrodes and positioned to be rendered conductive by the illuminated portion of said electroluminescent layer between said electrode means and said second of said series of spaced electrodes, and means for applying a pulse to said third conductor while its photoconductive element is still in conductive condition.
Claim 2
Dependent Claim
203 words
Scanning apparatus comprising an electroluminescent layer, electrode means on one side of said layer, a series of spaced electrodes on the other side of said electroluminescent layer, a conductor connected to the first electrode of said series of spaced electrodes, means for applying through said conductor a trigger pulse to the first of said spaced electrodes to energize the electroluminescent material between said electrode means and the first of said spaced electrodes, a second conductor including in series a photo conductive element connected to the second of said spaced electrodes and positioned to be rendered conductive by the illuminated portion of said electroluminescent layer upon energization of said first of said spaced electrodes, means for applying a pulse to said second conductor while its photoconductive material is still in conductive condition to energize the second of said spaced electrodes, a third conductor including in series a second photoconductive element connected to the third of said spaced electrodes and positioned to be rendered conductive by the illuminated portion of said electroluminescent layer between said electrode means and said second of said series of spaced electrodes, and means for applying a pulse to said third conductor while its photoconductive element is still in conductive condition.
Claim 3
Dependent Claim
46 words
The scanning apparatus of claim 1 including additional spaced electrodes and conductor means including photoconductive elements connected to each spaced electrode with each respective photoconductive element positioned to be rendered conductive by the electroluminescent material energized between the electrode means and the preceding energized spaced electrode.
Claim 4
Dependent Claim
31 words
Apparatus as defined in claim 2, wherein said means for applying the pulses to the spaced electrodes subsequent to the first electrode comprises at least two sources of transfer sync pulses.
Claim 5
Dependent Claim
48 words
Scanning apparatus of claim 3 wherein the sources of transfer sync pulse are paired, a first group of said conductors connecting alternate ones of said spaced electrodes with sync pulse source, and a second group of said conductors connecting the remaining electrodes with the other sync pulse source.
Claim 6
Dependent Claim
51 words
Apparatus as defined in claim 1, and further including a first layer of transparent insulating material adjacent said layer of electroluminesCent material, said spaced electrodes being transparent and arranged between said layers, said photoconductive elements being arranged on the side of said layer of transparent insulating material remote from said electrodes.
Claim 7
Dependent Claim
24 words
Apparatus as defined in claim 5, wherein each of said conductor means includes an interconnecting portion extending through said layer of transparent insulating material.
Claim 8
Dependent Claim
83 words
Apparatus as defined in claim 6, and further including a second layer of transparent insulating material adjacent said layer of energy emitting material on the side thereof remote from said first layer of transparent insulating material, and a second group of normally non-conductive photoconductive elements arranged on the side of said second transparent insulating layer remote from said energy emitting layer, said second group of photoconductive elements each being arranged for activation to a conductive condition upon energization of the corresponding electrode, respectively.
Claim 9
Dependent Claim
29 words
Apparatus as defined in claim 7, and further including matrix means including a plurality of X and Y grid elements operatively associated with said second group of photoconductive elements.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |