US5267028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state image pickup apparatus having luminance control
Assignee: Canon Inc
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Filing: 1991-10-21
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Granted: 1993-11-30
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Expires: 2011-10-21
Abstract
Abstract A solid state image pickup apparatus for obtaining a luminance signal from the average value of outputs of two or more pixels varying in spectral characteristic from line to line. It includes a circuit to correct the amplitude of a luminance signal in every other line such that the amplitude of the luminance signal in each line is constant in a uniform luminance face image pickup state. The circuit may automatically switch the amplitude of the luminance signal in accordance with a change in the color temperature.
Inventors
- 👤 Akira Suga
- 👤 Kazuyuki Matoba
- 👤 Takashi Sasaki
- 👤 Mayumi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:44
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/88; H04N9/00; H04N9/77; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/135; H04N25/136; H04N2209/00; H04N2209/04; H04N2209/041; H04N2209/042; H04N2209/045; H04N2209/046
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
A solid state image pickup apparatus for obtaining a luminance signal from an average value of two or more pixel outputs which are different in spectral characteristics from line-to-line, comprising: processing circuitry for correcting the amplitude of a luminance signal at every other line such that the amplitude of the luminance signal in each line is constant when an image of uniform luminance is picked-up, said processing circuitry automatically changing the amplitude of the luminance signal in accordance with a change in color temperature.
Claim 2
Dependent Claim
84 words
A solid state image pickup apparatus for obtaining a luminance signal from an average value of two or more pixel outputs which are different in spectral characteristics from line-to-line, comprising: processing circuitry for correcting the amplitude of a luminance signal at every other line such that the amplitude of the luminance signal in each line is constant when an image of uniform luminance is picked-up, said processing circuitry automatically changing the amplitude of the luminance signal in accordance with a change in color temperature.
Claim 3
Dependent Claim
32 words
An apparatus according to claim 1, wherein a difference in amplitude level between signals in different horizontal scanning lines is corrected by using a control signal generated in accordance with color signals.
Claim 4
Dependent Claim
24 words
A solid state image pickup apparatus according to claim 1, further comprising a CCD and a color filter provided in front of said CCd.
Claim 5
Dependent Claim
25 words
A solid state image pickup apparatus according to claim 3, wherein said color filter includes a plurality of colors which are arranged in a mosaic.
Claim 6
Dependent Claim
21 words
A solid state image pickup apparatus according to claim 4, wherein said plurality of colors include yellow, cyan, magenta, and green.
Claim 7
Dependent Claim
97 words
A signal processing apparatus for processing signals from a matrix of pixels, comprising: (a) input means for obtaining a luminance signal from an average value of two or more pixel outputs which are different in spectral characteristics from line-to-line; and (b) signal processing means for correcting the amplitude of a luminance signal at every other line such that the amplitude of the luminance signal in each line is constant when an image of uniform luminance is picked-up, said signal processing means automatically changing the amplitude of the luminance signal in accordance with a change in color temperature.
Claim 8
Dependent Claim
97 words
A signal processing apparatus for processing signals from a matrix of pixels, comprising: (a) input means for obtaining a luminance signal from an average value of two or more pixel outputs which are different in spectral characteristics from line-to-line; and (b) signal processing means for correcting the amplitude of a luminance signal at every other line such that the amplitude of the luminance signal in each line is constant when an image of uniform luminance is picked-up, said signal processing means automatically changing the amplitude of the luminance signal in accordance with a change in color temperature.
Claim 9
Dependent Claim
44 words
A signal processing apparatus according to claim 6, wherein said signal processing means corrects a difference in amplitude level between signals in different horizontal scanning lines by using a control signal generated in accordance with color signals which are based on said pixel outputs.
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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) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |