Patent US4577098A successfully refreshed from Google Patents.
US4577098A
Expired / Lapsed
US
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Solid-state image sensor with a phototropic or fluorescent layer
Assignee: Panasonic Holdings Corp
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Filing: 1983-04-11
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Granted: 1986-03-18
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Expires: 2003-04-11
Abstract
Abstract A solid-state image sensor comprising: a phototropic layer disposed in front of a picture element area, and/or a fluorescent film disposed on a photo sensor in a picture element area, wherein the phototropic layer contains a photoreversible phototropic matter which reduces optical transmittance only at an irradiated portion when a light spot of high intensity is irradiated thereon, and the optical transmittance is rapidly restored when the light spot is put away, thereby improving the clarity of the picture signal against blooming or smear. The fluorescent film absorbs a specified short wave-length spectral component of irradiated light and converts it to light of a longer wave-length, thereby improving the sensitivity of the short wave-length portion of said image sensor.
Inventors
- 👤 Kazufumi Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:10
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/80; H10F39/805; H10F39/8053; H10F39/806; H10F77/00; H10F77/40; H10F77/496
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
74 words
A solid state image sensor comprising: a picture element area including a photosensor array and a signal read out circuit; a phototropic layer disposed in front of said picture element area; the optical transmittance of said phototropic layer being reduced only at that portion thereof receiving a spot of high intensity light and said optical transmittance being rapidly restored to a normal transparent level when said spot of high intensity light is removed therefrom.
Claim 2
Dependent Claim
74 words
A solid state image sensor comprising: a picture element area including a photosensor array and a signal read out circuit; a phototropic layer disposed in front of said picture element area; the optical transmittance of said phototropic layer being reduced only at that portion thereof receiving a spot of high intensity light and said optical transmittance being rapidly restored to a normal transparent level when said spot of high intensity light is removed therefrom.
Claim 3
Dependent Claim
34 words
A solid-state image sensor in accordance with claim 1, wherein a color filter is disposed in front of said picture element area, and said phototropic layer is disposed on or below said color filter.
Claim 4
Dependent Claim
37 words
A solid-state image sensor in accordance with claim 1, wherein a color filter is disposed in front of said picture element area, and the color filter functions as said phototropic layer by containing a photo-reversible phototropic matter.
Claim 5
Dependent Claim
20 words
A solid-state iamge sensor in accordance with claim 1, wherein a photoconductive film is disposed on said picture element area.
Claim 6
Dependent Claim
24 words
A solid-state image sensor in accordance with claim 4, wherein said photoconductive film comprises a ZnSe--Zn 1-x Cd x Te or an amorphous silicon.
Claim 7
Dependent Claim
21 words
A solid-state image sensor in accordance with claim 1, wherein said phototropic layer comprises a polynuclear conjugate aromatic compound or spiropirane-compound.
Claim 8
Dependent Claim
67 words
A solid-state image sensor comprising: a fluorescent film disposed on a photosensor in a picture element area, the fluorescent film being transparent to green and red bands and the fluorescent film absorbing a blue cyan band and emitting a fluorescent radiation light with a wave-length longer than that of the absorbed light, said fluorescent film being disposed only between a blue or cyan filter and said photosensor.
Claim 9
Dependent Claim
67 words
A solid-state image sensor comprising: a fluorescent film disposed on a photosensor in a picture element area, the fluorescent film being transparent to green and red bands and the fluorescent film absorbing a blue cyan band and emitting a fluorescent radiation light with a wave-length longer than that of the absorbed light, said fluorescent film being disposed only between a blue or cyan filter and said photosensor.
Claim 10
Dependent Claim
80 words
A solid-state image sensor comprising: a phototropic layer on a photosensor in a picture element area, and a fluorescent film disposed on a photosensor in a picture element area, the fluorescent film being transparent to green and red bands and the fluorescent film absorbing a blue or cyan band and emitting a fluorescent radiation light with a wave-length longer than that of the absorbed light, said fluorescent film being disposed only between a blue or cyan filter and said photosensor.
Claim 11
Dependent Claim
80 words
A solid-state image sensor comprising: a phototropic layer on a photosensor in a picture element area, and a fluorescent film disposed on a photosensor in a picture element area, the fluorescent film being transparent to green and red bands and the fluorescent film absorbing a blue or cyan band and emitting a fluorescent radiation light with a wave-length longer than that of the absorbed light, said fluorescent film being disposed only between a blue or cyan filter and said photosensor.
Claim 12
Dependent Claim
24 words
A solid-state image sensor in accordance with claim 8, wherein said photo sensor comprises a ZnSe--Zn 1-x Cd x Te or an amorphous silicon.
Claim 13
Dependent Claim
25 words
A solid-state image sensor in accordance with claim 7 or 8, wherein said fluorescent film transduces a blue band light to a green band light.
Claim 14
Dependent Claim
25 words
A solid-state image sensor in accordance with claim 7 or 8, wherein said fluorescent film transduces a blue band light to a red band light.
Claim 15
Dependent Claim
21 words
A solid-state image sensor in accordance with claim 7 or 8, wherein said fluorescent film is disposed as a teasellated pattern.
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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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |