US3131254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma correction method for use in television and apparatus for carrying out these methods
Assignee: US Philips Corp
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Filing: 1960-10-05
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Granted: 1964-04-28
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Expires: 1980-10-05
Abstract
No abstract record available.
Inventors
- 👤 Billard Paul Louis
- 👤 Maguer Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:04
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/257; H04N5/14; H04N5/20; H04N9/00; H04N9/64; H04N9/68; H04N9/69
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
141 words
A SYSTEM FOR PROVIDING A NON-LINEAR CORRECTION FOR COLOR TELEVISION SIGNALS, SAID SYSTEM COMPRISING IMAGE PLATE MEANS HAVING AN IMAGE TO BE TELEVISED, FLYING SPOT SCANNER MEANS FOR PROVIDING A LINE BY LINE SCANNING SPOT OF LUMINOUS FLUX ON SAID PLATE MEANS, A PLURALITY OF MEANS FOR CONVERTING THE LUMINOUS FLUX OF THE ILLUMINATED POINTS OF SAID PLATE MEANS INTO A PLURALITY OF ELECTRIC SIGNALS CORRESPONDING TO DIFFERENT COLORS OF SAID IMAGE, MEANS FOR COMBINING SAID SIGNALS IN PREDETERMINED PROPORTIONS, NON-LINEAR CIRCUIT MEANS HAVING A POWER INDEX OF THE FORM 1 -1 $ WHEREIN $ IS A CONSTANT, MEANS APPLYING SAID COMBINED SIGNALS TO SAID NON-LINEAR CIRCUIT MEANS, MEANS APPLYING THE OUTPUT OF SAID NON-LINEAR CIRCUIT MEANS TO SAID SCANNER MEANS TO CONTROL THE INTENSITY OF SAID LUMINOUS FLUX, AND OUTPUT CIRCUIT MEANS CONNECTED TO THE OUTPUTS OF SAID CONVERTING 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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |