Patent US4780764A successfully refreshed from Google Patents.
US4780764A
Expired / Lapsed
US
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Image sensing apparatus
Assignee: Canon Inc
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Filing: 1987-01-29
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Granted: 1988-10-25
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Expires: 2007-01-29
Abstract
Abstract An image sensing apparatus comprises: a photodetector for converting an optical image to a charge signal; a recombination circuit for recombining a portion of the charges in the photodetector with the majority carrier; an instruction circuit for instructing change-over between the still mode, in which only one predetermined image signal is formed in the photodetector, and the movie mode, in which a plurality of image signals are formed; and a controller for switching the recombining capability by the recombination circuit during the formation of an image in accordance with an instruction output of the instruction circuit, in which the recombining capability in the still mode is controlled so as to be higher than that in the movie mode.
Inventors
- 👤 Takao Kinoshita
- 👤 Shinji Sakai
- 👤 Akira Suga
- 👤 Akihiko Tojo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:16
CPC Classifications
H; H04; H04N; H04N25/00; H04N25/60; H04N25/617; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/15; H10F39/153
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
149 words
An image sensing apparatus comprising: image sensing means having a plurality of photoelectric conversion cells, each of said cells having first and second regions for converting an optical image to electrical charges; clearing means for allowing at least a part of the charges in said image sensing means to be cleared; control means for allowing the charges to be stored in respective ones of said first and second regions for a predetermined interval, and for making said clearing means operative for almost the whole of a blanking period, for a first additional period immediately before said blanking period, and for a second additional blanking period which is shorter than said first additional period, and thereafter adding the charges in said first and second regions and reading them out; and signal generating means for generating an image signal by processing the electrical charges read out from said image sensing means.
Claim 2
Dependent Claim
149 words
An image sensing apparatus comprising: image sensing means having a plurality of photoelectric conversion cells, each of said cells having first and second regions for converting an optical image to electrical charges; clearing means for allowing at least a part of the charges in said image sensing means to be cleared; control means for allowing the charges to be stored in respective ones of said first and second regions for a predetermined interval, and for making said clearing means operative for almost the whole of a blanking period, for a first additional period immediately before said blanking period, and for a second additional blanking period which is shorter than said first additional period, and thereafter adding the charges in said first and second regions and reading them out; and signal generating means for generating an image signal by processing the electrical charges read out from said image sensing means.
Claim 3
Dependent Claim
22 words
An image sensing apparatus according to claim 1, wherein said signal generating means comprises clamp means for periodically clamping the image signal.
Claim 4
Dependent Claim
29 words
An image sensing apparatus according to claim 2, wherein said control means does not change the operating state of said clearing means during clamping operation of said clamping means.
Claim 5
Dependent Claim
17 words
An image sensing apparatus according to claim 1, further comprising recording means for recording the image signal.
Claim 6
Dependent Claim
25 words
An image sensing apparatus according to claim 1, wherein said signal generating means comprises an encoder for generating an NTSC signal at the image signal.
Claim 7
Dependent Claim
150 words
An image sensing apparatus comprising: (a) image sensing means which comprises a photoelectric converting portion for converting an optical image to electrical charges and a signal storing portion for storing the electrical charges after conversion by said photoelectric converting portion; (b) driving means for peridically transferring the electrical charges from said photoelectric converting portion to said storing portion and thereafter reading the electrical charges out from said storing portion; (c) recombining means for periodically recombining a portion of charges in said photoelectric converting portion with other charges for almost the whole of the horizontal blanking period and additional periods respectively immediately before and after said horizontal blanking period, wherein said additional period immediately before the horizontal blanking period is longer than said additional period immediately after the blanking period; and (d) signal generating means for generating an image signal by processing the electrical charges read out from said storing portion.
Claim 8
Dependent Claim
150 words
An image sensing apparatus comprising: (a) image sensing means which comprises a photoelectric converting portion for converting an optical image to electrical charges and a signal storing portion for storing the electrical charges after conversion by said photoelectric converting portion; (b) driving means for peridically transferring the electrical charges from said photoelectric converting portion to said storing portion and thereafter reading the electrical charges out from said storing portion; (c) recombining means for periodically recombining a portion of charges in said photoelectric converting portion with other charges for almost the whole of the horizontal blanking period and additional periods respectively immediately before and after said horizontal blanking period, wherein said additional period immediately before the horizontal blanking period is longer than said additional period immediately after the blanking period; and (d) signal generating means for generating an image signal by processing the electrical charges read out from said storing portion.
Claim 9
Dependent Claim
22 words
An image sensing apparatus according to claim 6, wherein said signal generating means comprises clamp means for periodically clamping the image signal.
Claim 10
Dependent Claim
30 words
An image sensing apparatus according to claim 7, wherein said recombination control means does not change the operating state of said recombining means during clamping operation of said clamping means.
Claim 11
Dependent Claim
17 words
An image sensing apparatus according to claim 6, further comprising recording means for recording the image signal.
Claim 12
Dependent Claim
25 words
An image sensing apparatus according to claim 6, wherein said signal generating means comprising an encoder for generating an NTSC signal as the image signal.
Claim 13
Dependent Claim
19 words
An image sensing apparatus according to claim 6, wherein said image sensing means comprises a frame transfer type CCD.
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |