US5633677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television camera apparatus
Assignee: Canon Inc
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Filing: 1994-06-28
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Granted: 1997-05-27
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Expires: 2014-06-28
Abstract
Abstract In a TV camera apparatus having an image sensor which photo-electrically converts image sensing light coming from an object, a signal processing circuit which converts a signal output from the image sensor into a luminance signal and color-difference signals and negative-to-positive inverters which invert the luminance signal and the color-difference signals from negative to positive, variable gain amplifiers are arranged within color-difference signal systems to amplify the color-difference signals; and the variable gain amplifiers are arranged to be controlled on the basis of the luminance signal.
Inventors
- 👤 Tadashi Okino
- 👤 Kunio Ninomiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:58
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/88
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
An image pickup apparatus, comprising:: a) image pickup means for converting an optical image into an electrical signal; b) processing means for producing a luminance signal and color-difference signals from the electrical signal outputted from said image pickup means; c) a first inverting means for inverting a level of said luminance signal outputted from said processing means with respect to a predetermined level; d) second inverting means for inverting a level of said color-difference signals outputted from said processing means with respect to predetermined levels; e) a first variable gain amplifier means for amplifying said luminance signal inverted by said first inverting means; f) modulation means for modulating said color-difference signals inverted by said second inverting means; g) a second variable gain amplifier means for amplifying said color-difference signals modulated by said modulation means; and h) mixing means for mixing outputs of said first and second variable gain amplifier means.
Claim 2
Dependent Claim
150 words
An image pickup apparatus, comprising:: a) image pickup means for converting an optical image into an electrical signal; b) processing means for producing a luminance signal and color-difference signals from the electrical signal outputted from said image pickup means; c) a first inverting means for inverting a level of said luminance signal outputted from said processing means with respect to a predetermined level; d) second inverting means for inverting a level of said color-difference signals outputted from said processing means with respect to predetermined levels; e) a first variable gain amplifier means for amplifying said luminance signal inverted by said first inverting means; f) modulation means for modulating said color-difference signals inverted by said second inverting means; g) a second variable gain amplifier means for amplifying said color-difference signals modulated by said modulation means; and h) mixing means for mixing outputs of said first and second variable gain amplifier means.
Claim 3
Dependent Claim
126 words
An image pickup apparatus, comprising: a) image pickup means for converting an optical image into an electrical signal; b) processing means for producing a luminance signal and color-difference signals from the electrical signal outputted from said image pickup means; c) a first inverting means for inverting a level of said luminance signal outputted from said processing means with respect to a predetermined level; d) a second inverting means for inverting said color-difference signals outputted from said processing means with respect to predetermined levels: e) modulation means for modulating said color-difference signals before being inverted by said second inverting means; f) mixing means for mixing outputs of said first and second inverting means; and g) variable gain amplifier means for amplifying an output of said mixing means.
Claim 4
Dependent Claim
126 words
An image pickup apparatus, comprising: a) image pickup means for converting an optical image into an electrical signal; b) processing means for producing a luminance signal and color-difference signals from the electrical signal outputted from said image pickup means; c) a first inverting means for inverting a level of said luminance signal outputted from said processing means with respect to a predetermined level; d) a second inverting means for inverting said color-difference signals outputted from said processing means with respect to predetermined levels: e) modulation means for modulating said color-difference signals before being inverted by said second inverting means; f) mixing means for mixing outputs of said first and second inverting means; and g) variable gain amplifier means for amplifying an output of said mixing means.
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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) | 2000-05-26 | 2000-11-25 | 2001-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-26 | 2004-11-25 | 2005-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-26 | 2008-11-25 | 2009-05-27 | $7700.00 | Window Closed / Lapsed |