US4901154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image pickup apparatus with coordinated clear and shutter functions
Assignee: Canon Inc
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Filing: 1989-02-16
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Granted: 1990-02-13
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Expires: 2009-02-16
Abstract
Abstract An image pickup apparatus comprises: an image sensor for converting an optical image into distribution information of a minority carrier; a control circuit for periodically forming a first state in that a majority carrier is accumulated in the image sensor and a second state in that at least a part of the minority carrier is recombined with this majority carrier; a readout circuit for reading out the information in the image sensor; a recording apparatus for selectively recording the information for a predetermined interval from the information to be read out by the readout circuit with regard to the trigger operation for a still photograph; and a stopping circuit for stopping the control operation of the control circuit in association with the start of the recording by the recording apparatus or the closing of a shutter or in response to a low luminous condition or the like.
Inventors
- 👤 Akira Suga
- 👤 Tadashi Okino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:42
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/21; H04N1/2104; H04N25/00; Y; Y10; Y10S; Y10S358/00; Y10S358/906
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
An image pickup apparatus comprising: photosensing means for converting an optical image into an electrical signal; combining means for periodically combining a part of the electrical signal converted by said photosensing means with a signal opposite in polarity to said electrical signal; shutter means for selectively blocking the light incident on said photosensing means and having an open state wherein light is incident on said photosensing means and a closed state wherein light is blocked; and control means for making said combining means inoperative for at least a predetermined period of time after initiation of said closed state of said shutter means.
Claim 2
Dependent Claim
102 words
An image pickup apparatus comprising: photosensing means for converting an optical image into an electrical signal; combining means for periodically combining a part of the electrical signal converted by said photosensing means with a signal opposite in polarity to said electrical signal; shutter means for selectively blocking the light incident on said photosensing means and having an open state wherein light is incident on said photosensing means and a closed state wherein light is blocked; and control means for making said combining means inoperative for at least a predetermined period of time after initiation of said closed state of said shutter means.
Claim 3
Dependent Claim
31 words
An image pickup apparatus according to claim 1, further comprising reading out means for reading out said electrical signal of said photosensing means with said shutter means in said closed state.
Claim 4
Dependent Claim
24 words
An image pickup apparatus according to claim 2, further comprising recording means for recording the electrical signal read out by said reading out means.
Claim 5
Dependent Claim
21 words
An image pickup apparatus according to claim 1, further comprising trigger means for initiating said closed state of said shutter means.
Claim 6
Dependent Claim
26 words
An image pickup apparatus according to claim 4, further comprising means for delaying said closed state for a predetermined time after initiation by said trigger means.
Claim 7
Dependent Claim
21 words
An image pickup apparatus according to claim 5, wherein said control means makes said combining means operative for said predetermined time.
Claim 8
Dependent Claim
31 words
An image pickup apparatus according to claim 6, further comprising reading out means for reading out said electrical signal of said photosensing means with said shutter means in said closed state.
Claim 9
Dependent Claim
24 words
An image pickup apparatus according to claim 7, further comprising recording means for recording the electrical signal read out by said reading out means.
References Cited (Backward Citations)
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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) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |