Patent US4498097A successfully refreshed from Google Patents.
US4498097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television signal producing device capable of compensating the color signal
Assignee: Canon Inc
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Filing: 1982-09-21
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Granted: 1985-02-05
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Expires: 2002-09-21
Abstract
Abstract Disclosed is a color television signal producing device in which the color signal is subject to compensation by controlling the amplitude and/or the phase of the auxiliary carrier when the auxiliary carrier is modulated by the input color signal to produce the carrier color signal.
Inventors
- 👤 Ryo Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:02
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A color television signal producing device comprising: generating means for generating two auxiliary sub-carriers of the same frequency but having a phase difference of 90° C.; a carrier color signal producing means for modulating the two sub-carriers with an input color signal into the carrier color signal; detecting means for detecting a predetermined color phase of said input color signal; and control means for variably controlling amplitude and/or color phase of the at least one of the carriers in response to the output of said detecting means.
Claim 2
Dependent Claim
87 words
A color television signal producing device comprising: generating means for generating two auxiliary sub-carriers of the same frequency but having a phase difference of 90° C.; a carrier color signal producing means for modulating the two sub-carriers with an input color signal into the carrier color signal; detecting means for detecting a predetermined color phase of said input color signal; and control means for variably controlling amplitude and/or color phase of the at least one of the carriers in response to the output of said detecting means.
Claim 3
Dependent Claim
22 words
A color television signal producing device in accordance with claim 1 further comprising image pick-up means for picking up the object image.
Claim 4
Dependent Claim
34 words
A color television signal producing device according to claim 1, wherein said detecting means produces a predetermined output in correspondence to values of a blue color difference signal and a red color difference signal.
Claim 5
Dependent Claim
37 words
A color television signal producing device according to claim 3, wherein said detecting means produces a predetermined output in correspondence to the positiveness or negativeness of said blue color difference signal and said red color difference signal.
Claim 6
Dependent Claim
35 words
A color television signal producing device according to claim 1, wherein said carrier color signal producing means includes an integrated circuit which is separated from said generating means, the detecting means and the control means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |