US3711719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage amplifier screen
Assignee: Westinghouse Electric Corp
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Filing: 1970-11-20
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Granted: 1973-01-16
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Expires: 1990-11-20
Abstract
Abstract A storage amplifier screen comprising a layer of photoconductive material responsive to an input radiation and a layer of electroluminescent material emissive of an output radiation are sandwiched between two electrical conductive electrodes. The screen provides high sensitivity, resolution and gain. The photoconductive material, doped zinc oxide, provides the property of persistence of the input image under excitation for over 10 minutes after removal of input radiation. The photoconductive layer also provides the property of storage of the image for days in the absence of an electrical field.
Inventors
- 👤 Z Szepesi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:38
CPC Classifications
H; H10; H10F; H10F55/00; H10F55/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
21 words
The display storage panel of claim 1 in which said zinc oxide material additionally contains predetermined amounts of lead and chlorine.
Claim 2
Dependent Claim
17 words
The display storage panel of claim 1 in which said display layer is comprised of electroluminescent material.
Claim 3
Dependent Claim
17 words
The display storage panel of claim 1 in which a plastic material surrounds said zinc oxide material.
Claim 4
Dependent Claim
28 words
The display storage panel of claim 3 in which electrically conductive electrodes are provided for impressing an electric field across said radiation responsive layer and said delay layer.
Claim 5
Dependent Claim
19 words
The display storage panel of claim 5 in which said electric field is provided by an alternating current source.
Claim 6
Dependent Claim
17 words
The display storage panel of claim 6 in which said input radiation is in the X-ray region.
Claim 7
Dependent Claim
30 words
The display storage panel of claim 1 in which said zinc oxide material contains dye material to modify the wavelength response of said radiation responsive layer to said input radiations.
Claim 8
Dependent Claim
30 words
The display storage panel of claim 1 in which means is provided for impressing heat on said radiation responsive layer to remove said conductivity image from said radiation responsive layer.
Claim 9
Dependent Claim
32 words
The display storage panel of claim 9 in which said means for impressing heat is an electrically conductive electrode extending across said panel and supplied with electrical current to heat said electrode.
Claim 10
Dependent Claim
28 words
The display storage panel of claim 4 in which said radiation responsive layer has a thickness at least four times greater than the thickness of said display layer.
Claim 11
Dependent Claim
20 words
The display storage panel of claim 11, in which said radiation responsive layer is greater than 200 micrometers in thickness.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |