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US4985775A
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US
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Electronic still camera system
Assignee: Fujifilm Holdings Corp
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Filing: 1989-02-13
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Granted: 1991-01-15
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Expires: 2009-02-13
Abstract
Abstract An electronic still camera in which every time a solid state pickup element is read out, immediately it is read out again in order to empty out residual charges.
Inventors
- 👤 Jin Murayama
- 👤 Ryuji Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:15
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/0035; H04N1/00352; H04N1/00384; H04N1/00397; H04N1/21; H04N1/2104; H04N1/2112; H04N1/2158; H04N25/00; H04N25/60; H04N25/62; H04N25/626; H04N2101/00; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
An electronic still camera system, comprising: a dark box; a focusing optical system in said box; a solid-state image-pickup in said dark box having a plurality of charge storage elements; a shutter in said dark box selectively passing light through said focusing optical system to said solid-state image-pickup element; reading means for performing a first read operation for reading out for recordation signals from predetermined elements of said solid-state image-pickup following an exposure thereof by said shutter, said reading means performing a second read operation for reading out residual charge from said predetermined elements of said solid-state image-pickup a predetermined time after said first read operation prior to a next exposure of said solid-state image-pickup element, said shutter remaining closed during said predetermined time.
Claim 2
Dependent Claim
124 words
An electronic still camera system, comprising: a dark box; a focusing optical system in said box; a solid-state image-pickup in said dark box having a plurality of charge storage elements; a shutter in said dark box selectively passing light through said focusing optical system to said solid-state image-pickup element; reading means for performing a first read operation for reading out for recordation signals from predetermined elements of said solid-state image-pickup following an exposure thereof by said shutter, said reading means performing a second read operation for reading out residual charge from said predetermined elements of said solid-state image-pickup a predetermined time after said first read operation prior to a next exposure of said solid-state image-pickup element, said shutter remaining closed during said predetermined time.
Claim 3
Dependent Claim
33 words
An electronic still camera system as recited in claim 1, wherein said reading means completes its second read operation at a time no later than approximately 1/30 second following said first read operation.
Claim 4
Dependent Claim
59 words
An electronic still camera system as recited in claim 1, further comprising; a shutter switch controlling said shutter; and wherein said reading means performs a third read operation for reading out residual charge from said elements of said solid state image-pickup a first predetermined time after an operation of said shutter switch and before an opening of said shutter.
Claim 5
Dependent Claim
49 words
An electronic Still camera as recited in claim 3, wherein said reading means performs said third read operation at a first operation of said shutter switch but not at a second operation of said shutter switch within a second predetermined time after said first operation of said shutter switch.
Claim 6
Dependent Claim
25 words
An electronic still camera as recited in claim 3, wherein said reading means performs said third read operation at every operation of said shutter switch.
Claim 7
Dependent Claim
53 words
An electronic still camera system as recited in claim 3, further comprising: a magnetic recording medium; and recording means for recording signals from said first reading means into said magnetic recording medium; and wherein said reading means completes said third read operation before a completion of a corresponding operation of said recording means.
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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |