US3588338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma correction and shading modulation circuitry for a television camera
Assignee: RCA Corp
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Filing: 1969-03-21
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Granted: 1971-06-28
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Expires: 1989-03-21
Abstract
Abstract IN A TELEVISION CAMERA APPARATUS IS PROVIDED FOR ADDING GAMMA CORRECTION AND SHADING MODULATION CORRECTION AND VARYING THE PEDESTAL HEIGHT OF VIDEO SIGNALS. ONE CIRCUIT COMBINES THE FUNCTIONS OF GAMMA CORRECTION AND SHADING MODULATION CORRECTION. ANOTHER CIRCUIT COMBINES THE FUNCTIONS OF GAMMA CORRECTION AND PEDESTAL OR BLACK LEVEL CONTROL WHILE MAINTAINING THE WHITE LEVEL OF THE SIGNALS CONSTANT.
Inventors
- 👤 Robert A Dischert
- 👤 Laurence Joseph Thorpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:44
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/81; H04N23/82; H04N23/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |