US4455574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image pickup device
Assignee: Canon Inc
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Filing: 1982-05-12
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Granted: 1984-06-19
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Expires: 2002-05-12
Abstract
Abstract The disclosed image pick-up device is provided with a scanning type image sensing arrangement having an image sensing area and a light-shielded area for obtaining an optical black reference, and control means for changing the scanning speeds between said image sensing area and light-shielded area.
Inventors
- 👤 Seiji Hashimoto
- 👤 Nobuyoshi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:13
CPC Classifications
H; H04; H04N; H04N25/00; H04N25/60; H04N25/63; H04N25/633
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
An image pickup device comprising: (A) an image sensing surface having a first portion for obtaining image signals and a second portion for obtaining an optical black reference; (B) means for scanning said image sensing surface; and (C) means for controlling the scanning means to change the scanning speed of said scanning means between said first portion and said second portion.
Claim 2
Dependent Claim
61 words
An image pickup device comprising: (A) an image sensing surface having a first portion for obtaining image signals and a second portion for obtaining an optical black reference; (B) means for scanning said image sensing surface; and (C) means for controlling the scanning means to change the scanning speed of said scanning means between said first portion and said second portion.
Claim 3
Dependent Claim
45 words
An image pickup device as described in claim 1, wherein said control means is formed to control the speed of scanning so that the speed of scanning of the second portion of said image sensing surface is slower than that of scanning the first portion.
Claim 4
Dependent Claim
43 words
An image pickup device as described in claim 2, wherein said second portion of said image sensing surface is located on said image sensing surface to be able to obtain the optical black reference in a horizontal blanking period of a standard television.
Claim 5
Dependent Claim
54 words
An image pickup device as described in claim 1, or 2, or 3, further including: means for clamping at least a part of those of the signals obtained by scanning said image sensing surface by said scanning means which correspond to said second portion to a predetermined level to obtain the optical black reference.
Claim 6
Dependent Claim
24 words
An image pickup device as described in claim 4, wherein said image sensing surface has one array of a plurality of photo-electric transducer elements.
Claim 7
Dependent Claim
68 words
An image pickup device as described in claim 5, further including: means positioned in the preceding stage of said clamp means for sampling and holding the signals of the individual photo-electric transducer elements constituting said image sensing surface; and wherein said clamp means clamps those of the signals sampled and held by said sample and hold means which correspond to said second portion to the said predetermined level.
References Cited (Backward Citations)
US4002824A
Cited
US4293877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |