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US4901152A
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US
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Image pickup apparatus
Assignee: Canon Inc
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Filing: 1988-08-25
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Granted: 1990-02-13
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Expires: 2008-08-25
Abstract
Abstract An image pickup apparatus which alternately performs 1/n-sec light storage and 1/m-sec light storage (m>n), and outputs an image pickup signal obtained by mixing a 1/n-sec stored image and a 1/m-sec stored image. The apparatus has a circuit for separately controlling white balance of the 1/n-sec stored image portion and the 1/m-sec stored image portion.
Inventors
- 👤 Teruo Hieda
- 👤 Toshiyuki Masui
- 👤 Koji Takahashi
- 👤 Katsuji Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:08
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/88
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
91 words
An image pickup apparatus comprising: (a) an image pickup section for alternately performing light storage for a first period and light storage for a second period shorter than the first period, and for outputting an image pickup signal obtained by mixing an image stored in the first period and an image stored in the second period; and (b) white balance control means for separately performing white-balance control of the stored image portion of the first period and the stored image portion of the second period obtained from the image pickup signal.
Claim 2
Dependent Claim
91 words
An image pickup apparatus comprising: (a) an image pickup section for alternately performing light storage for a first period and light storage for a second period shorter than the first period, and for outputting an image pickup signal obtained by mixing an image stored in the first period and an image stored in the second period; and (b) white balance control means for separately performing white-balance control of the stored image portion of the first period and the stored image portion of the second period obtained from the image pickup signal.
Claim 3
Dependent Claim
18 words
An apparatus according to claim 1, wherein the first period is almost equal to a television field period.
Claim 4
Dependent Claim
26 words
An apparatus according to claim 1 or 2, wherein the second period is equal to or shorter than a field blanking period of a television signal.
Claim 5
Dependent Claim
18 words
An apparatus according to claim 1, wherein said image pickup section comprises a memory for mixing the images.
Claim 6
Dependent Claim
46 words
An apparatus according to claim 1, wherein said white balance control means independently performs white balance control operations of the stored image portions of the first and second periods based on image pickup signals of the stored image portions of the first and second periods, respectively.
Claim 7
Dependent Claim
32 words
An apparatus according to claim 1, further comprises mixing control means for controlling a mixed state in accordance with luminance levels of the stored image portions of the first and second periods.
Claim 8
Dependent Claim
78 words
An image pickup apparatus comprising: (a) image pickup means for alternately outputting a first image pickup signal for a first storage period, and a second image pickup signal for a second storage period; (b) detecting means for detecting levels of the first and second image pickup signals; and (c) mixing means for selecting color signals from the first and second image pickup signals in accordance with an output from said detecting means, and then outputting the obtained signal.
Claim 9
Dependent Claim
78 words
An image pickup apparatus comprising: (a) image pickup means for alternately outputting a first image pickup signal for a first storage period, and a second image pickup signal for a second storage period; (b) detecting means for detecting levels of the first and second image pickup signals; and (c) mixing means for selecting color signals from the first and second image pickup signals in accordance with an output from said detecting means, and then outputting the obtained signal.
Claim 10
Dependent Claim
18 words
An apparatus according to claim 7, wherein the first period is almost equal to a television field period.
Claim 11
Dependent Claim
26 words
An apparatus according to claim 7 or 8, wherein the second period is equal to or shorter than a field blanking period of a television signal.
Claim 12
Dependent Claim
13 words
An apparatus according to claim 7, wherein said mixing means includes a memory.
Claim 13
Dependent Claim
26 words
An apparatus according to claim 7, wherein said mixing means includes selection means for selectively outputting color signals from the first and second image pickup signals.
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) | 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 |