Patent US1695320A successfully refreshed from Google Patents.
Patent US3692918A successfully refreshed from Google Patents.
US3692918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic registration of color television cameras
Assignee: RCA Corp
•
Filing: 1971-05-17
•
Granted: 1972-09-19
•
Expires: 1991-05-17
Abstract
Abstract Predominantly positive and negative polarity waves formed from edge video signals, representing sharp transitions between light and dark areas of a subject and derived from two of a plurality of pickup tubes respectively responsive to different component colors of the subject, are peak detected to produce a signal having such polarity and amplitude as to so control the beam deflection in one of the tubes that the edge video signals are made to coincide in time.
Inventors
- 👤 Charles Langdon Olson
- 👤 Robert Adams Dischert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:45
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/10; H04N23/13; H04N23/15
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
224 words
In a color television video signal-generating system including a plurality of camera tubes receiving respective images representing a plurality of component colors of a subject and scanned by respective electron beams, automatic beam deflection control apparatus for effecting the production from all of said camera tubes of video signals which simultaneously represent the same elements of said respective component color images, said apparatus comprising: wave-producing means responsive to edge video signals derived from two selected ones of said camera tubes and representative of a relatively sharp transition between light and dark areas of said subject for developing a first predominantly negative polarity wave and a second predominantly positive polarity wave, both being indicative of the timing relationship of said edge video signals from said respective selected camera tubes; differencing means responsive to said predominantly positive and negative waves to produce an indicator signal having a polarity indicating the sense of any time non-coincidence of said edge video signals from said respective selected camera tubes, and an amplitude indicating the magnitude of any time noncoincidence; deflection control signal-producing means responsive to said indicator signal to produce a beam deflection control signal; and means for impressing said control signal upon said beam deflection control apparatus of one of said selectedcamera tubes to effect time coincidence of said edge video signals derived from said respective selected tubes.
Claim 2
Dependent Claim
224 words
In a color television video signal-generating system including a plurality of camera tubes receiving respective images representing a plurality of component colors of a subject and scanned by respective electron beams, automatic beam deflection control apparatus for effecting the production from all of said camera tubes of video signals which simultaneously represent the same elements of said respective component color images, said apparatus comprising: wave-producing means responsive to edge video signals derived from two selected ones of said camera tubes and representative of a relatively sharp transition between light and dark areas of said subject for developing a first predominantly negative polarity wave and a second predominantly positive polarity wave, both being indicative of the timing relationship of said edge video signals from said respective selected camera tubes; differencing means responsive to said predominantly positive and negative waves to produce an indicator signal having a polarity indicating the sense of any time non-coincidence of said edge video signals from said respective selected camera tubes, and an amplitude indicating the magnitude of any time noncoincidence; deflection control signal-producing means responsive to said indicator signal to produce a beam deflection control signal; and means for impressing said control signal upon said beam deflection control apparatus of one of said selectedcamera tubes to effect time coincidence of said edge video signals derived from said respective selected tubes.
Claim 3
Dependent Claim
151 words
Automatic beam deflection control apparatus as defined in claim 1, wherein: said wave-producing means comprises; first wave-shaping means responsive to said edge video signal derived from a first one of Said selected camera tubes for producing a double lobe wave, said lobes being of opposite polarity and occurring respectively in two consecutive time periods, second wave-shaping means responsive to said edge video signal derived from a second one of said selected camera tubes for producing two single lobe waves, the respective lobes of which being substantially equal to one another and of opposite polarity and respectively occurring in the same time period, first wave-combining means for combining said double lobe wave with said single lobe wave of positive polarity to produce said predominantly positive polarity wave, and second wave-combining means for combining said double lobe wave with said single lobe wave of negative polarity to produce said predominantly negative polarity wave.
Claim 4
Dependent Claim
75 words
Automatic beam deflection control apparatus as defined in claim 2, wherein: said differencing means comprises; means including a positive peak detector responsive to said predominantly positive polarity wave to produce a first component of said indicator signal, means including a negative peak detector responsive to said predominantly negative polarity wave to produce a second component of said indicator signal, and means for combining said first and second indicator signal components to produce said indicator signal.
Claim 5
Dependent Claim
41 words
Automatic beam deflection control apparatus as defined in claim 3, wherein: said deflection control signal-producing means comprises; signal storage means operative to maintain impression upon said deflection control apparatus of a produced control signal until a different control signal is produced.
Claim 6
Dependent Claim
36 words
Automatic beam deflection control apparatus as defined in claim 4, wherein: said signal storage means include; an up-down counter responsive to respective up and down pulses to oppositely alter the magnitude of said deflection control signal.
Claim 7
Dependent Claim
44 words
Automatic beam deflection control apparatus as defined in claim 5, wherein: said signal storage means also includes; a trigger pulse generator and a pair of gates separately operable to impress pulses from said generator upon said counter as said up and down pulses respectively.
Claim 8
Dependent Claim
50 words
Automatic beam deflection control apparatus as defined in claim 6, wherein: said signal storage means further includes; polarity comparison means responsive to an indicator signal of one polarity for operating one of said gates and responsive to an indicator signal of opposite polarity for operating the other of said gates.
Claim 9
Dependent Claim
136 words
Automatic beam deflection control apparatus as defined in claim 2, wherein: said first wave-shaping means comprises; means for developing said edge video signal derived from said first selected camera tube as a first component of said double lobe wave, means responsive to said edge video signal derived from said first selected camera tube and including a series arrangement of a first delay line and a polarity reversing and amplitude doubling amplifier for producing a second component of said double lobe wave, means responsive to said edge video signal derived from said first camera tube and including a series arrangement of said first delay line and a second like delay line for producing a third component of said double lobe wave, and means for combining said first, second and third components to produce said double lobe wave.
Claim 10
Dependent Claim
158 words
Automatic beam deflection control apparatus as defined in claim 8, wherein: said second wave-shaping means comprises; means responsive to said edge video signal derived from said second selected camera tube and including a series arrangement of a third delay line, having one-half the delay period of said first and second delay lines, and a polarity reverser for producing a first component of one of said single lobe waves, means responsive to said edge video signal derived from said second selected camera tube and including a series arrangement of said third delaY line and a fourth delay line, like said first and second delay lines, for producing a second component of one of said single lobe waves, means for combining said first and second single lobe wave components to produce one of said single lobe waves, and means responsive to said one single lobe wave and including a polarity reverser for producing the other of said single lobe waves.
Claim 11
Dependent Claim
46 words
Automatic beam deflection control apparatus as defined in claim 2, wherein: said first wave-shaping means comprises; first and second differentiators mutually interconnected in a series circuit and responsive to said edge video signal derived from said first selected camera tube for producing said double lobe wave.
Claim 12
Dependent Claim
63 words
Automatic beam deflection control apparatus as defined in claim 10, wherein: said second wave-shaping means comprises; a third differentiator responsive to said edge video signal derived from said second selected camera tube for producing one of said single lobe waves, and means responsive to said one single lobe wave and including a polarity reverser for producing the other of said single lobe waves.
Claim 13
Dependent Claim
25 words
Automatic beam deflection control apparatus as defined in claim 11, wherein: integrating means is coupled to the respective outputs of said first and third differentiators.
Claim 14
Dependent Claim
25 words
Automatic beam deflection control apparatus as defined in claim 12, wherein: integrating means is coupled to the respective inputs of said first and third differentiators.
Claim 15
Dependent Claim
110 words
Automatic beam deflection control apparatus as defined in claim 13, wherein: said differencing means includes; a positive peak detector and a negative peak detector responsive to said predominantly positive polarity wave to produce a first component and an alternate first component respectively of said indicator signal, a negative peak detector and a positive peak detector responsive to said predominantly negative polarity wave to produce a second component and an alternate second component respectively of said indicator signal, means for combining said first and second indicator signal components to produce said indicator signal, and means for combining said alternate first and second indicator signal components to produce an alternate indicator signal.
References Cited (Backward Citations)
DE1941237A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |