US3648052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid-state image-converting device
Assignee: Panasonic Holdings Corp
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Filing: 1969-01-22
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Granted: 1972-03-07
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Expires: 1989-01-22
Abstract
Abstract A solid-state image-converting device comprising an energysensitive layer and a luminescent element whose luminescence is controlled in response to the variation of the impedance of said energy-sensitive layer, in which said energy-sensitive layer is a composite layer consisting of a layer for sensing the incident energy and a photoconductive layer responding to the light fed back from said luminescent element, thereby to improve the sensitivity of the device greatly.
Inventors
- 👤 Tadao Nakamura
- 👤 Shigeaki Nakamura
- 👤 Tadao Kohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
H; H10; H10F; H10F55/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A solid-state image-converting device comprising a luminescent element whose luminescent intensity is controlled according to the intensity of an electric field applied thereto, and a composite element including a photoconductive element which responds to light fed back from said luminescent element and an energy-sensitive element which varies the impedance thereof in response to incident energy, the variation in the luminescent intensity of said luminescent element due to the variation in the impedance of said energy-sensitive element related to the incident energy being amplified by a luminescent feedback and amplification system consisting of said luminescent element and said photoconductive element.
Claim 2
Dependent Claim
99 words
A solid-state image-converting device comprising a luminescent element whose luminescent intensity is controlled according to the intensity of an electric field applied thereto, and a composite element including a photoconductive element which responds to light fed back from said luminescent element and an energy-sensitive element which varies the impedance thereof in response to incident energy, the variation in the luminescent intensity of said luminescent element due to the variation in the impedance of said energy-sensitive element related to the incident energy being amplified by a luminescent feedback and amplification system consisting of said luminescent element and said photoconductive element.
Claim 3
Dependent Claim
17 words
A solid-state image-converting device as defined in claim 1, wherein said energy-sensitive element is a photoconductive layer.
Claim 4
Dependent Claim
53 words
A solid-state image-converting device as defined in claim 1, wherein there is further included an intermediate layer provided between said luminescent element and said composite element, which reflects a part of the light from said luminescent element toward said luminescent element and feeds back another part of the light toward said composite element.
Claim 5
Dependent Claim
48 words
A solid-state image-converting device as defined in claim 1, wherein said photoconductive element and said luminescent element are chosen so that the sensitive range in wavelength of said photoconductive element markedly overlaps the luminescent spectrum of said luminescent element, in order to attain a bistable state of luminescence.
Claim 6
Dependent Claim
49 words
A solid-state image-converting device as defined in claim 2, wherein said photoconductive layer of said composite element is formed so as to have high sensitivity and fast response time to incident light and another photoconductive element is a photoconductive layer which has high dark resistance and high dielectric strength.
Claim 7
Dependent Claim
49 words
A solid-state image-converting device as defined in claim 1, wherein said luminescent element consists of a first electroluminescent layer for producing the luminescent output and a second electroluminescent layer for feeding back light to said composite element, with a light-intercepting layer interposed between said first and second electroluminescent layers.
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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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |