US4660075A
Expired / Lapsed
US
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Color information detecting device
Assignee: Canon Inc
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Filing: 1984-10-25
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Granted: 1987-04-21
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Expires: 2004-10-25
Abstract
Abstract A color information detecting device comprising a plurality of color detecting apparatus for detecting respective different color lights from each other, converting apparatus for producing an output in non-linear relation to the input signal, changeover apparatus for selectively applying the outputs of the color detecting apparatus to the converting apparatus, apparatus for coinciding a number of successive outputs of the converting apparatus, and computing apparatus for computing the coincided signals from the coincidence apparatus. The device also includes a first constant current source for applying current of a prescribed intensity and a second constant current source for supplying current of another intensity equal to the prescribed intensity times the intensity of the current supplied from the first source which are included so that another mode can operate. The outputs of the first and second constant current sources are selectively applied to the converting apparatus. These features have the advantage of achieving simplicity of the construction of the structure and stabilization of the temperature characteristics.
Inventors
- 👤 Seiji Hashimoto
- 👤 Shinji Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:44
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/60; H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/88
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
94 words
A color information detecting device comprising: a plurality of color sensing means for sensing different color lights from one another; converting means for non-linearly converting an input signal; current source means for generating a plurality of predetermined levels of constant current; changeover means for selectively inputting the outputs of said color sensing means and said plurality of predetermined levels of constant current into said converting means for generating non-linearly converted outputs, respectively; and computing means for computing said non-linearly converted outputs each other to generate a color temperature information removed of a temperature error.
Claim 2
Dependent Claim
94 words
A color information detecting device comprising: a plurality of color sensing means for sensing different color lights from one another; converting means for non-linearly converting an input signal; current source means for generating a plurality of predetermined levels of constant current; changeover means for selectively inputting the outputs of said color sensing means and said plurality of predetermined levels of constant current into said converting means for generating non-linearly converted outputs, respectively; and computing means for computing said non-linearly converted outputs each other to generate a color temperature information removed of a temperature error.
Claim 3
Dependent Claim
33 words
A device according to claim 1, wherein said plurality of color sensing means include a red color sensor for detecting a red color, and a blue color sensor for detecting a blue color.
Claim 4
Dependent Claim
24 words
A device according to claim 2, wherein said plurality of color sensing means further include a green color sensor for detecting a green color.
Claim 5
Dependent Claim
21 words
A device according to claim 1, wherein said converting means includes a logarithmic compression circuit for logarithmically compressing an input signal.
Claim 6
Dependent Claim
29 words
A device according to claim 1, wherein said computing means includes an analog-to-digital converter for converting each of the successive outputs of said converting means to a digital signal.
Claim 7
Dependent Claim
49 words
A device according to claim 1, further comprising: image pickup means for converting an optical image to color video signals; and means responsive to the output of said computing means for adjusting the balance of all the color signals out of the output signals of said image pickup means.
Claim 8
Dependent Claim
33 words
A device according to claim 6, wherein said balance adjusting means includes gain controllers for adjusting the gains of all the color signals out of the output signals of said image pickup means.
Claim 9
Dependent Claim
121 words
A non-linear converting device comprising: photo-electric transducer means for converting incident lights into electrical signals; a first constant current source for supplying a predetermined constant current; a second constant current source for supplying a constant current equal to a predetermined number of times the supplied current of said first constant current source; converting means for non-linearly converting an input signal; changeover means for selectively applying the outputs of said photo-electric transducer means, and said first and said second constant current sources to said converting means; and correction means for correcting temperature errors contained in the outputs of the photo-electric transducing means through said converting means by using the outputs of the first and second constant current sources through said converting means.
Claim 10
Dependent Claim
121 words
A non-linear converting device comprising: photo-electric transducer means for converting incident lights into electrical signals; a first constant current source for supplying a predetermined constant current; a second constant current source for supplying a constant current equal to a predetermined number of times the supplied current of said first constant current source; converting means for non-linearly converting an input signal; changeover means for selectively applying the outputs of said photo-electric transducer means, and said first and said second constant current sources to said converting means; and correction means for correcting temperature errors contained in the outputs of the photo-electric transducing means through said converting means by using the outputs of the first and second constant current sources through said converting means.
Claim 11
Dependent Claim
31 words
A device according to claim 8, further comprising: computing means for computing said outputs of said photo-electric transducing means and said first and second constant current sources through said converting means.
Claim 12
Dependent Claim
26 words
A device according to claim 8, wherein said photo-electric transducer means includes a plurality of color sensing means for detecting different color lights from one another.
Claim 13
Dependent Claim
33 words
A device according to claim 10, wherein said plurality of color sensing means include a red color sensor for detecting a red color, and a blue color sensor for detecting a blue color.
Claim 14
Dependent Claim
23 words
A device according to claim 11, said plurality of color sensing means further include a green color sensor for detecting a green color.
Claim 15
Dependent Claim
21 words
A device according to claim 8, wherein said converting means includes a logarithmic compression circuit for logarithmically compressing an input signal.
Claim 16
Dependent Claim
34 words
A device according to claim 8, wherein said correction means includes an analog-to-digital converter which converts the outputs of the converting means into a digital signal and a memory which stores the digital signal.
Claim 17
Dependent Claim
149 words
A non-linear converting device comprising: photo-electric transducer means for converting incident lights into electrical signals; a first constant current source for supplying a predetermined constant current; a second constant current source for supplying a constant current equal to a predetermined number of times the supplied current of said first constant current source; converting means for non-linearly converting an input signal; changeover means for selectively applying the outputs of said photo-electric transducer means, and said first and said second constant current source to said converting means; computing means for computing said outputs of said photo-electric transducing means and said first and second constant current sources through said converting means; image pickup means for converting an optical image to color video signals; and means responsive to the output of said computing means for adjusting the balance of all the color signals out of the output signals of said image pickup means.
Claim 18
Dependent Claim
149 words
A non-linear converting device comprising: photo-electric transducer means for converting incident lights into electrical signals; a first constant current source for supplying a predetermined constant current; a second constant current source for supplying a constant current equal to a predetermined number of times the supplied current of said first constant current source; converting means for non-linearly converting an input signal; changeover means for selectively applying the outputs of said photo-electric transducer means, and said first and said second constant current source to said converting means; computing means for computing said outputs of said photo-electric transducing means and said first and second constant current sources through said converting means; image pickup means for converting an optical image to color video signals; and means responsive to the output of said computing means for adjusting the balance of all the color signals out of the output signals of said image pickup means.
Claim 19
Dependent Claim
33 words
A device according to claim 15, wherein said balance adjusting means includes gain controllers for adjusting the gains of all the color signals out of the output signals of said image pickup means.
Claim 20
Dependent Claim
26 words
A device according to claim 15, wherein said photo-electric transducer means includes a plurality of color sensing means for detecting different color lights from one another.
Claim 21
Dependent Claim
33 words
A device according to claim 17, wherein said plurality of color sensing means include a red color sensor for detecting a red color, and a blue color sensor for detecting a blue color.
Claim 22
Dependent Claim
24 words
A device according to claim 18, wherein said plurality of color sensing means further include a green color sensor for detecting a green color.
Claim 23
Dependent Claim
21 words
A device according to claim 15, wherein said converting means includes a logarithmic compression circuit for logarithmically compressing an input signal.
Claim 24
Dependent Claim
29 words
A device according to claim 15, wherein said computing means includes an analog-to-digital converter for converting each of the successive outputs of said converting means to a digital signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |