Patent US5904543A successfully refreshed from Google Patents.
Patent US5424774A successfully refreshed from Google Patents.
US5424774A
Expired / Lapsed
US
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Image sensing apparatus
Assignee: Canon Inc
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Filing: 1993-11-23
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Granted: 1995-06-13
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Expires: 2013-11-23
Abstract
Abstract An image sensing apparatus includes an image sensing circuit, an inverting circuit for inverting a polarity of an output of the image sensing circuit, and a correcting circuit for correcting a black reference level of the output of the image sensing circuit in accordance with an operation of the inversion circuit.
Inventors
- 👤 Tsutomu Takayama
- 👤 Yasuyuki Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:12
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6027; H04N1/40; H04N1/407; H04N1/4072; H04N23/00; H04N23/80; H04N23/84; H04N23/87; H04N23/88; H04N5/00; H04N5/14; H04N5/16; H04N5/18; H04N5/185; H04N5/222; H04N5/253
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
63 words
An image sensing apparatus comprising; image sensing means; clamp means for clamping a predetermined portion of an output of said image sensing means to a predetermined reference level; inverting means for selectively inverting a polarity of an output of said clamp means; and varying means for varying said reference level of said clamp means in accordance with an operation of said inverting means.
Claim 2
Dependent Claim
63 words
An image sensing apparatus comprising; image sensing means; clamp means for clamping a predetermined portion of an output of said image sensing means to a predetermined reference level; inverting means for selectively inverting a polarity of an output of said clamp means; and varying means for varying said reference level of said clamp means in accordance with an operation of said inverting means.
Claim 3
Dependent Claim
16 words
An image sensing apparatus according to claim 1, wherein said clamping means includes a clamping circuit.
Claim 4
Dependent Claim
36 words
An image sensing apparatus according to claim 2, wherein said clamping circuit includes a first clamping power source for supplying a first clamping potential and a second clamping power source for supplying a second clamping potential.
Claim 5
Dependent Claim
40 words
An image sensing apparatus according to claim 1, wherein said inverting means includes a first inverting circuit for inverting a polarity of a luminance signal and second and third inverting circuits for inverting polarities of R-Y and B-Y signals, respectively.
Claim 6
Dependent Claim
17 words
An image sensing apparatus according to claim 1, wherein said image sensing means includes a charge-coupled device.
Claim 7
Dependent Claim
38 words
An image sensing apparatus according to claim 1, further comprising exposure controlling means for controlling an exposure amount of said image sensing means, said exposure controlling means being controlled in accordance with an output of said clamp means.
Claim 8
Dependent Claim
79 words
An image sensing apparatus comprising: color image sensing means for correcting an optical image into an electrical signal and generating a plurality of color signals; clamp means for clamping a predetermined portion of an output of said image sensing means to a predetermined reference level; inversion processing means for selectively inverting said plurality of color signals; and level changing means for changing said reference level of said clamp means in accordance with an operation of said inversion processing means.
Claim 9
Dependent Claim
79 words
An image sensing apparatus comprising: color image sensing means for correcting an optical image into an electrical signal and generating a plurality of color signals; clamp means for clamping a predetermined portion of an output of said image sensing means to a predetermined reference level; inversion processing means for selectively inverting said plurality of color signals; and level changing means for changing said reference level of said clamp means in accordance with an operation of said inversion processing means.
Claim 10
Dependent Claim
16 words
An image sensing apparatus according to claim 7, wherein said clamp means includes a clamping circuit.
Claim 11
Dependent Claim
36 words
An image sensing apparatus according to claim 8, wherein said clamping circuit includes a first clamping power source for supplying a first clamping potential and a second clamping power source for supplying a second clamping potential.
Claim 12
Dependent Claim
41 words
An image sensing apparatus according to claim 7, wherein said inversion processing means includes a first inverting circuit for inverting a polarity of a luminance signal and second and third inverting circuits for inverting polarities of R-Y and B-Y signals, respectively.
Claim 13
Dependent Claim
18 words
An image sensing apparatus according to claim 7, wherein said color image sensing means includes a charge-coupled device.
Claim 14
Dependent Claim
17 words
An image sensing apparatus according to claim 8, wherein said clamping circuit includes a feedback clamping circuit.
Claim 15
Dependent Claim
40 words
An image sensing apparatus according to claim 7, further comprising exposure controlling means for controlling an exposure amount of said color image sensing means, said exposure controlling means being controlled in accordance with an output of said level changing means.
Claim 16
Dependent Claim
80 words
An image sensing apparatus comprising: image sensing means for converting subject light into an electrical signal and outputting a plurality of color signals; white balance control means for automatically controlling a white-balance condition of said color signals based on an output of a color temperature detecting means; negative/positive inverting means; mode selecting means for selecting a negative/positive inversion mode; and fixing means for fixing the white-balance condition regardless of said white-balance control means when the negative/positive inversion mode is selected.
Claim 17
Dependent Claim
80 words
An image sensing apparatus comprising: image sensing means for converting subject light into an electrical signal and outputting a plurality of color signals; white balance control means for automatically controlling a white-balance condition of said color signals based on an output of a color temperature detecting means; negative/positive inverting means; mode selecting means for selecting a negative/positive inversion mode; and fixing means for fixing the white-balance condition regardless of said white-balance control means when the negative/positive inversion mode is selected.
Claim 18
Dependent Claim
29 words
An image sensing apparatus according to claim 14, wherein said fixing means fixes the white-balance condition to a respective different condition in accordance with the kind of negative film.
Claim 19
Dependent Claim
66 words
An image sensing apparatus comprising: image sensing means; level control means for setting a predetermined portion of an output of said image sensing means to a predetermined reference level; inverting means for selectively inverting a polarity of an output of said level control means; and varying means for varying said reference level of said level control means in accordance with an operation of said inverting means.
Claim 20
Dependent Claim
66 words
An image sensing apparatus comprising: image sensing means; level control means for setting a predetermined portion of an output of said image sensing means to a predetermined reference level; inverting means for selectively inverting a polarity of an output of said level control means; and varying means for varying said reference level of said level control means in accordance with an operation of said inverting means.
Claim 21
Dependent Claim
16 words
An image sensing apparatus according to claim 16, wherein said level control means includes clamping means.
Claim 22
Dependent Claim
36 words
An image sensing apparatus according to claim 17, wherein said clamping means includes a first clamping power source for supplying a first clamping potential and a second clamping power source for supplying a second clamping potential.
Claim 23
Dependent Claim
40 words
An image sensing apparatus according to claim 16, wherein said inverting means includes a first inverting circuit for inverting a polarity of a luminance signal and second and third inverting circuits for inverting polarities of R-Y and B-Y signals, respectively.
Claim 24
Dependent Claim
17 words
An image sensing apparatus according to claim 16, wherein said image sensing means includes a charge-coupled device.
Claim 25
Dependent Claim
39 words
An image sensing apparatus according to claim 16, further comprising exposure controlling means for controlling an exposure amount of said image sensing means, said exposure controlling means being controlled in accordance with an output of said level control means.
Claim 26
Dependent Claim
16 words
An image sensing apparatus according to claim 16, wherein said image sensing means includes color sensor.
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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) | 1998-06-12 | 1998-12-12 | 1999-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-12 | 2002-12-12 | 2003-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-12 | 2006-12-12 | 2007-06-13 | $7700.00 | Window Closed / Lapsed |