US3748374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-color periscope view simulator
Assignee: United States Department of the Navy
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Filing: 1972-02-07
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Granted: 1973-07-24
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Expires: 1992-02-07
Abstract
Abstract The necessity for using expensive color cameras in a TV system to display colored foreground (and/or background) objects is avoided. A plurality of foreground objects to be displayed are colored various shades of gray and are observed by black and white TV cameras. The invention processes the camera video output signals so that they cause a color TV monitor to display the foreground objects in selected colors in a composite picture comprising a background and one or more foreground objects. The invention can be used to color the background scene as well.
Inventors
- 👤 W Curran
- 👤 J Kulik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:30
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/06; G09B9/063; H; H04; H04N; H04N9/00; H04N9/64; H04N9/74; H04N9/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
328 words
In a television system having at least one monochrome television camera and at least one color television receiver for displaying a televised scene, an object colored at least one selected shade of gray and positioned in the field of view of said camera, said shade of gray being selected to cause said camera to develop distinctive video output voltage levels in response to scanning different shades of gray, coloring means responsive to said video voltage levels connecting said camera and said receiver for adding a color signal to said video voltage level to cause said receiver to display said object in color, sAid coloring means including at least one adjustable color circuit for developing a selected color signal, means for adding said selected color signal to said video voltage level, a plurality of said adjustable color circuits, selecting means for selecting a particular color circuit to supply a selected color signal to said adding means, said selecting means including comparator means for comparing said video voltage level with a reference voltage, said comparator means developing a particular output voltage pattern in response to a particular video voltage level, gating means connected to said comparator means and said color circuits for gating selected color signals to said adding means in response to said comparator output voltage pattern, each of said color circuits comprising an ''''I'''' modulator, an oscillator connected to furnish a selected frequency to said I modulator, a first potentiometer connected to furnish a modulating voltage to said I modulator to modulate said frequency, a ''''Q'''' modulator, a phase shifter connected to said oscillator to receive said frequency and connected to furnish a phase shifted frequency to said Q modulator, a second potentiometer connected to furnish a modulating voltage to said Q modulator to modulate said phase shifted frequency, and a common output line for combining a modulated frequency from said I modulator and a modulated phase shifted frequency from said Q modulator to form a color signal.
Claim 2
Dependent Claim
328 words
In a television system having at least one monochrome television camera and at least one color television receiver for displaying a televised scene, an object colored at least one selected shade of gray and positioned in the field of view of said camera, said shade of gray being selected to cause said camera to develop distinctive video output voltage levels in response to scanning different shades of gray, coloring means responsive to said video voltage levels connecting said camera and said receiver for adding a color signal to said video voltage level to cause said receiver to display said object in color, sAid coloring means including at least one adjustable color circuit for developing a selected color signal, means for adding said selected color signal to said video voltage level, a plurality of said adjustable color circuits, selecting means for selecting a particular color circuit to supply a selected color signal to said adding means, said selecting means including comparator means for comparing said video voltage level with a reference voltage, said comparator means developing a particular output voltage pattern in response to a particular video voltage level, gating means connected to said comparator means and said color circuits for gating selected color signals to said adding means in response to said comparator output voltage pattern, each of said color circuits comprising an ''''I'''' modulator, an oscillator connected to furnish a selected frequency to said I modulator, a first potentiometer connected to furnish a modulating voltage to said I modulator to modulate said frequency, a ''''Q'''' modulator, a phase shifter connected to said oscillator to receive said frequency and connected to furnish a phase shifted frequency to said Q modulator, a second potentiometer connected to furnish a modulating voltage to said Q modulator to modulate said phase shifted frequency, and a common output line for combining a modulated frequency from said I modulator and a modulated phase shifted frequency from said Q modulator to form a color signal.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |