US3604850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed continuous motion film and television scan synchronization
Assignee: GTE Sylvania Inc
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Filing: 1970-04-15
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Granted: 1971-09-14
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Expires: 1990-04-15
Abstract
Abstract A system is provided for deriving images from a film of film frames, either motionless or continuously and bidirectionally movable at different speeds, and effecting translation between the different film frame speeds and the scanning frequency of a display device whereon the derived images are displayed. A flying spot scanner system is employed wherein a film of film frames is continuously advanced through a film scanning zone, the film frames are detected to provide a pair of vertical scan modification signals, a selector means switches from one to the other of the modification signals in accordance with the positional location of the film frames within the film scanning zone and the retrace period of the vertical scanning signals, and the vertical scan and vertical scan modification signals are combined and applied to the flying spot scanner system to vertically modulate electron beam scanning in accordance with film movement.
Inventors
- 👤 Robert Roy Eckenbrecht
- 👤 Charles Bailey Neal
- 👤 Dong Woo Rhee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:48
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/11; G; G03; G03B; G03B31/00; G03B31/02; H04N3/00; H04N3/36; H04N3/38; H04N3/40; H04N3/405; H04N5/00; H04N5/76; H04N5/84
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
281 words
In a system having a means for deriving signals representing images from a film of film frames continuously advanced through a film scanning zone, apparatus for modulating vertical scanning of the film to effect synchronization of vertical scanning of the film and of an image display device, said apparatus comprising in combination: means for developing vertical scanning signals having a given frequency of scanning substantially equal to the frequency of vertical scanning of an image display device; means for developing vertical scan modification signals, said means being associated with said advancement of film through said film scanning zone and coupled to said means for developing vertical scanning signals at a given frequency and including means responsive to said continuously advancing film for providing dual time spaced signals representative of positional location of successive frames of film in said film scanning zone and means for switching from one to the other of said dual time spaced signals in accordance with the pOsitional location of a frame of film in said film scanning zone and a signal from said vertical scanning signal development means whereby is provided a resultant vertical scan modification signal representing film frame positional location in a film scanning zone and having a retrace period coincident with the retrace period of the vertical scan signal; and means coupled to said vertical scan and vertical scan modification means for combining said signals to provide a composite vertical scan and vertical scan modification signal and for applying said composite vertical scan and vertical scan modification signal to said means for deriving images from a film of film frames whereby synchronized vertical scanning of said film and an image display device is effected.
Claim 2
Dependent Claim
281 words
In a system having a means for deriving signals representing images from a film of film frames continuously advanced through a film scanning zone, apparatus for modulating vertical scanning of the film to effect synchronization of vertical scanning of the film and of an image display device, said apparatus comprising in combination: means for developing vertical scanning signals having a given frequency of scanning substantially equal to the frequency of vertical scanning of an image display device; means for developing vertical scan modification signals, said means being associated with said advancement of film through said film scanning zone and coupled to said means for developing vertical scanning signals at a given frequency and including means responsive to said continuously advancing film for providing dual time spaced signals representative of positional location of successive frames of film in said film scanning zone and means for switching from one to the other of said dual time spaced signals in accordance with the pOsitional location of a frame of film in said film scanning zone and a signal from said vertical scanning signal development means whereby is provided a resultant vertical scan modification signal representing film frame positional location in a film scanning zone and having a retrace period coincident with the retrace period of the vertical scan signal; and means coupled to said vertical scan and vertical scan modification means for combining said signals to provide a composite vertical scan and vertical scan modification signal and for applying said composite vertical scan and vertical scan modification signal to said means for deriving images from a film of film frames whereby synchronized vertical scanning of said film and an image display device is effected.
Claim 3
Dependent Claim
38 words
The combination of claim 1 wherein said means responsive to said continuously advancing film for providing dual time spaced signals includes a film frame detector means associated with said film and providing signals representative of each film frame.
Claim 4
Dependent Claim
39 words
The combination of claim 1 including a second switching means coupled to said film frame advancement means and intermediate said vertical scan modification signal development means and a potential reference level for selectively affecting directional reversal of film advancement.
Claim 5
Dependent Claim
68 words
The combination of claim 1 wherein said means responsive to said continuously advancing film of said means for developing vertical scan modification signals includes a film frame detector means associated with said film and having a divider means for providing dual output signals time spaced with respect to one another and at a frequency directly related to the rate of film frame advancement through said film scanning zone.
Claim 6
Dependent Claim
28 words
The combination of claim 4 wherein said dual output signals are at a frequency of about one-half the rate of film frame advancement through said film scanning zone.
Claim 7
Dependent Claim
35 words
The combination of claim 1 wherein said means for developing vertical scan modification signals includes a source of clock pulse signals associated with and responsive to said continuously advancing film through said film scanning zone.
Claim 8
Dependent Claim
68 words
The combination of claim 1 wherein said means for developing vertical scan modification signals includes detector means and a clock pulse signal source associated with said film advancement through said film scanning zone and dual signal development means coupled and responsive to said detector means and clock pulse signal source for providing a pair of signals representing positional location of successive film frames in said film scanning zone.
Claim 9
Dependent Claim
35 words
The combination of claim 7 wherein said dual signal development means is in the form of a pair of counter chains each coupled to said film frame detector means and said clock pulse signal source.
Claim 10
Dependent Claim
20 words
The combination of claim 7 wherein said dual signal development means provides signals in the form of binary logic information.
Claim 11
Dependent Claim
46 words
The combination of claim 7 including means responsive to said dual signal development means for developing at least one ramp signal having a slope which varies at a rate substantially equal to the positional variation of a frame of film in said film frame scanning zone.
Claim 12
Dependent Claim
22 words
The combination of claim 7 including means responsive to said dual signal developing means for providing a pair of staircase ramp signals.
Claim 13
Dependent Claim
45 words
The combination of claim 1 wherein said means for developing vertical scan modification signals includes at least one threshold means responsive to the magnitude of at least one of said dual time spaced signals for effecting switching from one to the other of said signals.
Claim 14
Dependent Claim
52 words
The combination of claim 1 wherein said means for providing dual time spaced signals of said means for developing vertical scan modification signals provides said dual time spaced signals in the form of binary logic information and said switching means switches from one to the other of said binary logic information signals.
Claim 15
Dependent Claim
54 words
The combination of claim 1 wherein meanS for switching from one to the other of said dual time spaced signals of said means for developing vertical scan modification signals is responsive to the positional location of a film frame in said film scanning zone and a signal from said vertical scan signal development means.
Claim 16
Dependent Claim
234 words
Apparatus having a given scanning frequency for visually displaying images derived from a continuously moving film of film frames on an image display device comprising in combination: source of synchronizing pulse signals; horizontal and vertical drive signal circuitry coupling said pulse signal generator to said visual image display device; flying spot scanner means including a flying spot scanner tube, a film scanning zone, means for continuously advancing a film of film frames through said scanning zone, and image signal detection and processing means; vertical scan modification signal development means associated with said film advancing means and said vertical scan drive circuitry providing dual time spaced modification signals representing positional location of successive film frames in said film frame scanning zone and selectively switching from one to the other of said dual time spaced vertical scan modification signals in accordance with positional location of a film frame in the film scanning zone and a vertical scan signal; signal-combining network means coupling said vertical scan drive signal circuitry and said vertical scan modification signal development means to said flying spot scanner means to effect modulation in vertical scanning at a rate dependent upon the rate of film frame advancement through said film scanning zone; and encoder means coupled to said source of synchronizing pulse signals and to said image signal detection and processing means for providing electrical signals suitable for display on an image display device.
Claim 17
Dependent Claim
234 words
Apparatus having a given scanning frequency for visually displaying images derived from a continuously moving film of film frames on an image display device comprising in combination: source of synchronizing pulse signals; horizontal and vertical drive signal circuitry coupling said pulse signal generator to said visual image display device; flying spot scanner means including a flying spot scanner tube, a film scanning zone, means for continuously advancing a film of film frames through said scanning zone, and image signal detection and processing means; vertical scan modification signal development means associated with said film advancing means and said vertical scan drive circuitry providing dual time spaced modification signals representing positional location of successive film frames in said film frame scanning zone and selectively switching from one to the other of said dual time spaced vertical scan modification signals in accordance with positional location of a film frame in the film scanning zone and a vertical scan signal; signal-combining network means coupling said vertical scan drive signal circuitry and said vertical scan modification signal development means to said flying spot scanner means to effect modulation in vertical scanning at a rate dependent upon the rate of film frame advancement through said film scanning zone; and encoder means coupled to said source of synchronizing pulse signals and to said image signal detection and processing means for providing electrical signals suitable for display on an image display device.
Claim 18
Dependent Claim
30 words
The combination of claim 15 wherein said image signal detection and processing means of said flying spot scanner means provides electrical signals representative of color information derived from said film.
Claim 19
Dependent Claim
43 words
The combination of claim 15 including a color signal encoder coupled to said synchronizing pulse signal generator and said image signal detection and processing means and a color signal transmitter coupled to said encoder whereby a transmittable composite color television signal is provided.
Claim 20
Dependent Claim
33 words
The combination of claim 15 wherein said vertical scan modification means includes film frame detector means associated with said means for continuously advancing a film of film frames through said film scanning zone.
Claim 21
Dependent Claim
72 words
The combination of claim 15 wherein said vertical scan modification means includes a film frame detector means and clock pulse generator means both associated with said means for continuously advancing a film through said film scanning zone and dual signal development means coupled to said film frame detector means and said clock pulse generator means for providing dual output signals representing positional location of successive film frames in said film scanning zone.
Claim 22
Dependent Claim
21 words
The combination of claim 19 wherein said dual signal development means provides output signals in the form of binary logic information.
Claim 23
Dependent Claim
52 words
The combination of claim 19 including staircase ramp signal development means coupled to each of said dual signal development means for dual output providing a pair of substantially identical staircase ramp signals each having a slope substantially proportional to the rate of advancement of film frame through said film frame scanning zone.
Claim 24
Dependent Claim
55 words
The combination of claim 19 wherein said dual output signals from side dual signal development means are in the form of binary information and said signal switching selector means switches from one to the other of said output signals in accordance with the positional location of a film frame in said film frame scanning zone.
Claim 25
Dependent Claim
239 words
Apparatus for deriving from a continuously moving film of film frames an image suitable for display on a color television receiver comprising in combination: color television receiver means including a visual image display device and drive circuitry providing signals at horizontal and vertical scan frequencies and coupled to said display device; flying spot scanner means including a flying spot scanner tube, film frame scanning zone, means for continuously advancing a film through the scanning zone, and image detection and processing means; vertical scan modification means coupled to said vertical drive circuitry of said television receiver and said means for continuously advancing a film through said film scanning zone, said means providing a pair of time spaced signals each representing one of a pair of successive film frames in said film scanning zone; signal selector means coupled to said vertical scan modification means and said vertical drive circuitry of said television receiver for switching from one to the other of said pair of time spaced signals in accordance with the positional location of a frame of film within said film scanning zone and during period of retrace of said vertical scan drive circuitry; and signal combining network means coupling said vertical scan drive circuitry and said signal selector means to said flying spot scanner means to effect electron beam scan modification at a rate substantially equal to the rate of movement of a film frame through said film scanning zone.
Claim 26
Dependent Claim
239 words
Apparatus for deriving from a continuously moving film of film frames an image suitable for display on a color television receiver comprising in combination: color television receiver means including a visual image display device and drive circuitry providing signals at horizontal and vertical scan frequencies and coupled to said display device; flying spot scanner means including a flying spot scanner tube, film frame scanning zone, means for continuously advancing a film through the scanning zone, and image detection and processing means; vertical scan modification means coupled to said vertical drive circuitry of said television receiver and said means for continuously advancing a film through said film scanning zone, said means providing a pair of time spaced signals each representing one of a pair of successive film frames in said film scanning zone; signal selector means coupled to said vertical scan modification means and said vertical drive circuitry of said television receiver for switching from one to the other of said pair of time spaced signals in accordance with the positional location of a frame of film within said film scanning zone and during period of retrace of said vertical scan drive circuitry; and signal combining network means coupling said vertical scan drive circuitry and said signal selector means to said flying spot scanner means to effect electron beam scan modification at a rate substantially equal to the rate of movement of a film frame through said film scanning zone.
Claim 27
Dependent Claim
90 words
The combination of claim 23 including a switching means for selectively coupling signals from said flying spot scanner means and from a television signal receiver to said color television receiver to selectively effect a visual image display derived from film and from intercepted signals. cm 25. The combination of claim 23 including a second switching means coupled to said means for continuously advancing a film and said vertical scan modification means for effecting reversal of the vertical scan modification signals upon reversal of said means for continuously advancing a film.
Claim 28
Dependent Claim
37 words
The combination of claim 23 including means for coupling said horizontal drive circuitry to said visual image display device of said color television receiver and to said flying spot scanner tube of said flying spot scanner means.
References Cited (Backward Citations)
US2523156A
Cited
US2922841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |