US3787619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide angle display system
Assignee: United States Department of the Navy
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Filing: 1972-06-07
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Granted: 1974-01-22
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Expires: 1992-06-07
Abstract
Abstract A wide angle display system wherein a wide angle background scene has a hole cut therein to receive a narrow angle computer generated insert picture. The necessary blanking signals are computed and generated for each wide angle field based on the narrow angle picture data for the immediately preceding field.
Inventors
- 👤 H Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:17
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/30; G09B9/301; G09B9/302; H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/272
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
202 words
A composite scene television display system wherein a wide angle background scene is blanked where necessary to accept as an insert a narrow angle, higher resolution computer generated scene, said system comprising: wide angle televison projection means utilizing line scanning for displaying said background scene on a screen; narrow angle television projection means utilizing line scanning for displaying on a portion of said screen said narrow angle scene as an insert to said background scene; means for generating narrow angle video signals for use by said narrow angle projection means; said narrow angle projection means being positionable to vary said portion of said screen on which said narrow angle scene is displayed; means for providing position signals representative of the position of said narrow angle projection means; means for generating horizontal and vertical sync signals for use by said projection means; and blanking signal computer and generator means, responsive to said position signals, said sync signals, and to said narrow angle video signals, for computing and generating wide angle video blanking signals whereby a hole is formed in each field of said wide angle scene which will match the shape of the narrow angle scene of the immediately preceding narrow angle field.
Claim 2
Dependent Claim
202 words
A composite scene television display system wherein a wide angle background scene is blanked where necessary to accept as an insert a narrow angle, higher resolution computer generated scene, said system comprising: wide angle televison projection means utilizing line scanning for displaying said background scene on a screen; narrow angle television projection means utilizing line scanning for displaying on a portion of said screen said narrow angle scene as an insert to said background scene; means for generating narrow angle video signals for use by said narrow angle projection means; said narrow angle projection means being positionable to vary said portion of said screen on which said narrow angle scene is displayed; means for providing position signals representative of the position of said narrow angle projection means; means for generating horizontal and vertical sync signals for use by said projection means; and blanking signal computer and generator means, responsive to said position signals, said sync signals, and to said narrow angle video signals, for computing and generating wide angle video blanking signals whereby a hole is formed in each field of said wide angle scene which will match the shape of the narrow angle scene of the immediately preceding narrow angle field.
Claim 3
Dependent Claim
56 words
A composite scene television display system as defined in claim 1, and wherein said blanking signal computer and generator comprises: delay means for introducing the delays necessary to initiate and terminate said blanking signals in each wide angle field based on the computer generated narrow angle video signal data of the immediately preceding narrow angle field.
Claim 4
Dependent Claim
69 words
A composite scene television display system as defined in claim 2, and wherein said delay means comprises: temporary storage means for storing the computer generated narrow angle video signal data of a given field; means for reading out said data during the immediately following wide angle field at a rate corresponding to the wide angle scan rate; and means for converting said read out data to said blanking signals.
Claim 5
Dependent Claim
30 words
A composite scene televiSion display system as defined in claim 3, and wherein: said temporary storage means and said means for reading out said data comprise scan conversion tube means.
Claim 6
Dependent Claim
98 words
A composite scene television display system as defined in claim 4, and wherein: said scan conversion tube means comprises first and second scan conversion tubes each of which has a write section and a read section; means for causing said narrow angle data to be read into said first and said second scan conversion tubes alternately during successive narrow angle fields; and means for causing said data to be read out from said first and second tubes on successive alternate fields, whereby when one tube is receiving data the other is having data read out and vice versa.
Claim 7
Dependent Claim
136 words
A composite scene television display system as defined in claim 5, and wherein said blanking signal computer and generator further comprises: first horizontal and vertical deflection generators for controlling the deflection of the writing beam of each of said scan conversion tubes so as to scan the storage elements of said scan conversion tubes with full deflection corresponding to the narrow angle projection area; second horizontal and vertical deflection generators for controlling the deflection of the reading beam of each of said scan conversion tubes, so as to scan said storage elements in synchronism with scan of a corresponding area of the wide angle scene; and video comparator means for generating a wide angle video blanking signal whenever said read-out from one or the other of said scan conversion tubes is characteristic of narrow angle video.
Claim 8
Dependent Claim
64 words
A composite scene television display system as defined in claim 6, and wherein said blanking signal generator and computer further comprises: first and second variable delay means, responsive to said position signals, for offsetting the outputs of said second vertical and horizontal deflection generators so as to coordinate blanking of said background scene in accordance with the position of said narrow angle projection means.
Claim 9
Independent Claim
123 words
A method of generating a composite, multiple field television display wherein a computer generated narrow angle scene is inserted into a wide angle scene, comprising the steps of: projecting a wide angle television background scene with a first scanning type television projector; projecting a computer generated narrow angle television insert scene with a dirigible second scanning type television projector; sensing the position of said second projector; temporarily storing data corresponding to one field of said narrow angle scene; computing from said data and from the sensed position of the second projector the periods in the immediately following wide angle field during which wide angle video must be blanked to accommodate said narrow angle scene; and blanking said wide angle video during those periods.
Claim 10
Independent Claim
123 words
A method of generating a composite, multiple field television display wherein a computer generated narrow angle scene is inserted into a wide angle scene, comprising the steps of: projecting a wide angle television background scene with a first scanning type television projector; projecting a computer generated narrow angle television insert scene with a dirigible second scanning type television projector; sensing the position of said second projector; temporarily storing data corresponding to one field of said narrow angle scene; computing from said data and from the sensed position of the second projector the periods in the immediately following wide angle field during which wide angle video must be blanked to accommodate said narrow angle scene; and blanking said wide angle video during those periods.
Claim 11
Independent Claim
130 words
A method of generating a composite television display wherein a computer generated narrow angle display is inserted into a wide angle scene, comprising the steps of: projecting a wide angle television background scene with a first scanning type television projector; projecting a computer generated narrow angle television insert scene with a dirigible second scanning type television projector; sensing the position of said second projector; alternatively storing data corresponding to alternating first and second interlace fields of said narrow angle scene; computing from said data for each narrow angle field and from the sensed position of said second projector the periods in the immediately following wide angle fields during which wide angle video must be blanked to accommodate said narrow angle scene; and blanking said wide angle video during those periods.
Claim 12
Independent Claim
130 words
A method of generating a composite television display wherein a computer generated narrow angle display is inserted into a wide angle scene, comprising the steps of: projecting a wide angle television background scene with a first scanning type television projector; projecting a computer generated narrow angle television insert scene with a dirigible second scanning type television projector; sensing the position of said second projector; alternatively storing data corresponding to alternating first and second interlace fields of said narrow angle scene; computing from said data for each narrow angle field and from the sensed position of said second projector the periods in the immediately following wide angle fields during which wide angle video must be blanked to accommodate said narrow angle scene; and blanking said wide angle video during those periods.
References Cited (Backward Citations)
US3612761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |