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US4517588A
Expired / Lapsed
US
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Color solid state image pick-up device
Assignee: Canon Inc
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Filing: 1982-07-28
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Granted: 1985-05-14
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Expires: 2002-07-28
Abstract
Abstract A color solid state image pick-up device in which a color filter array is arranged so as to correspond to each picture element of the solid state image pick-up elements and the output from the solid state image pick-up elements is processed so as to obtain the pseudo-brightness signal, being characterized in that at least one of the brightness signal including a high frequency band component used as the image signal, the brightness signal including a low frequency band component and the brightness signal used as the color difference signal is obtained on the basis of the different output signal from that connected with other brightness signal.
Inventors
- 👤 Tetsuro Kuwayama
- 👤 Nobuyoshi Tanaka
- 👤 Seiji Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:50
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/133; H04N25/134
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A color solid state image pick-up apparatus, comprising: (a) a solid state image pick-up device for transducing an optical picture image into an electrical signal, said pick-up device having a plurality of rows; (b) filter means in an incident light path to the solid state image pick-up device for imparting different spectral characteristics to light incident on a portion of the solid state image pick-up device; (c) operation means for forming a signal corresponding to a brightness by adding output signals from a plurality of rows of the solid state image pick-up device with a predetermined ratio; (d) low-frequency selecting means for selecting and emitting a low-frequency component of the output signal from a predetermined row of the solid state image pick-up device; and (e) mixing means for mixing the output of the operation means with the output of the low-frequency selecting means.
Claim 2
Dependent Claim
143 words
A color solid state image pick-up apparatus, comprising: (a) a solid state image pick-up device for transducing an optical picture image into an electrical signal, said pick-up device having a plurality of rows; (b) filter means in an incident light path to the solid state image pick-up device for imparting different spectral characteristics to light incident on a portion of the solid state image pick-up device; (c) operation means for forming a signal corresponding to a brightness by adding output signals from a plurality of rows of the solid state image pick-up device with a predetermined ratio; (d) low-frequency selecting means for selecting and emitting a low-frequency component of the output signal from a predetermined row of the solid state image pick-up device; and (e) mixing means for mixing the output of the operation means with the output of the low-frequency selecting means.
Claim 3
Dependent Claim
26 words
A device according to claim 1, in which the filter means is composed of plurality of portions having different spectral characteristics arranged in a mosaic pattern.
Claim 4
Dependent Claim
148 words
A color solid state image pick-up apparatus comprising: (a) a solid state image pick-up device for transducing an optical picture image into an electrical signal, said pick-up device having a plurality of rows; (b) filter means in an incident light path to the solid state image pick-up device, for imparting different spectral characteristics to light incident on a portion of the solid state image pick-up device; (c) subtracting means for forming a color signal by subtracting output signals from a plurality of the rows of the solid state image pick-up device; (d) adding means for forming a signal corresponding to a brightness by adding output signals from a plurality of the rows of the solid state image pick-up device; and (e) color difference signal forming means for forming a color difference signal by subtracting the low-frequency components of the output of the adding means and the color signal.
Claim 5
Dependent Claim
148 words
A color solid state image pick-up apparatus comprising: (a) a solid state image pick-up device for transducing an optical picture image into an electrical signal, said pick-up device having a plurality of rows; (b) filter means in an incident light path to the solid state image pick-up device, for imparting different spectral characteristics to light incident on a portion of the solid state image pick-up device; (c) subtracting means for forming a color signal by subtracting output signals from a plurality of the rows of the solid state image pick-up device; (d) adding means for forming a signal corresponding to a brightness by adding output signals from a plurality of the rows of the solid state image pick-up device; and (e) color difference signal forming means for forming a color difference signal by subtracting the low-frequency components of the output of the adding means and the color signal.
Claim 6
Dependent Claim
115 words
A color solid state image pick-up device, comprising: (a) means for forming a signal charge said means forming a plurality of independent potential wells to store the signal charge corresponding to each of the different color filter elements in each of the wells; (b) means for mixing the signal charges stored in two different potential wells and producing a color signal by reading out the mixed signal charges; and (c) a color filter provided on the front face of the signal charge storing means and having a portions each portion having a relatively small light transmittance so as to reduce light incident on some of wells to a degree insufficient to completely shield the light.
Claim 7
Dependent Claim
115 words
A color solid state image pick-up device, comprising: (a) means for forming a signal charge said means forming a plurality of independent potential wells to store the signal charge corresponding to each of the different color filter elements in each of the wells; (b) means for mixing the signal charges stored in two different potential wells and producing a color signal by reading out the mixed signal charges; and (c) a color filter provided on the front face of the signal charge storing means and having a portions each portion having a relatively small light transmittance so as to reduce light incident on some of wells to a degree insufficient to completely shield the light.
References Cited (Backward Citations)
US4245241A
Cited
US4437112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |