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US3995269A
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US
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Alignment of a video display system having multiple inputs
Assignee: Lockheed Martin Corp
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Filing: 1974-11-29
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Granted: 1976-11-30
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Expires: 1994-11-29
Abstract
Abstract Alignment apparatus is disclosed for use in a radar display system in which targets are displayed on a raster scanned cathode ray tube and a computer causes target identities to be displayed adjacent to each target. To align the display system the computer generates a first signal which is applied to the system in the same manner as are radar video signals, and generate a second signal which is applied to the system in the same manner as are target identity signals. The two signals cause two dot test patterns to be displayed on the tube and interactive display techniques including a positional entry device such as a light pen are used to cause the two test patterns to be superposed. In response to superposition of each dots of the test patterns, the computer generates and stores correction signals which are thereafter used to modify the target identity signals to assure that target identities are displayed in proper registration with the targets.
Inventors
- 👤 Arnold Schumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:38
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
228 words
A method for aligning an interactive video display system equipped with a positional entry device and wherein said display system has first and second display signals input thereto via a first and a second circuit path respectively to provide a composite display on a display device of said system, comprising the steps of applying a first alignment signal to said first circuit path to display a first test pattern on said display device, applying a second alignment signal to said second circuit path to display a second test pattern on said display device, utilizing said positional entry device with said display system in an interactive mode to superimpose a plurality of discrete points of said first test pattern on a like plurality of discrete points of said second test pattern on said display device and thereby generate correction signals, storing said correction signals in a memory, and modifying said first display signals being input to said first circuit path, to change the position of a first information display on said display device by an amount indicated by an interpolation performed by said computer between the correction signals stored in said memory for the discrete points of said first test pattern among which said first information display is located to assure that said first information display is in proper registration with a second information display on said display device.
Claim 2
Independent Claim
228 words
A method for aligning an interactive video display system equipped with a positional entry device and wherein said display system has first and second display signals input thereto via a first and a second circuit path respectively to provide a composite display on a display device of said system, comprising the steps of applying a first alignment signal to said first circuit path to display a first test pattern on said display device, applying a second alignment signal to said second circuit path to display a second test pattern on said display device, utilizing said positional entry device with said display system in an interactive mode to superimpose a plurality of discrete points of said first test pattern on a like plurality of discrete points of said second test pattern on said display device and thereby generate correction signals, storing said correction signals in a memory, and modifying said first display signals being input to said first circuit path, to change the position of a first information display on said display device by an amount indicated by an interpolation performed by said computer between the correction signals stored in said memory for the discrete points of said first test pattern among which said first information display is located to assure that said first information display is in proper registration with a second information display on said display device.
Claim 3
Dependent Claim
120 words
The method of aligning an interactive display system in accordance with claim 1 further comprising the steps of generating said first alignment signal in response to a test signal stored in said memory, generating said second alignment signal in response to said test signal stored in said memory, said first information display being in exact registration with said second information display on said display device if said first and said second alignment signals are both applied to said first or to said second circuit path, but not being in exact registration with each other when applied to said first and to said second circuit paths respectively prior to modifying said first display signals due to electrical differences between said paths.
Claim 4
Independent Claim
255 words
A method for aligning a radar system wherein radar return signals are input via a first circuit path to a positional entry device equipped interactive radar display indicator functioning with a computer and a memory to display targets, and target identification apparatus identifies targets and generates identification signals which are applied via a second circuit path to a display generator which generates video signals that are input to said display indicator to display appropriate identification symbols on said indicator adjacent to the appropriate target traces, comprising the steps of applying a first alignment signal to said first circuit path to display a first test pattern on said display indicator, applying a second alignment signal via said second circuit path to said display generator to display a second test pattern on said display indicator concurrently with the display of said first test pattern, using said positional entry device in an interactive mode of operation to superimpose a multiplicity of specific points of said first test pattern on said second test pattern on said display indicator, and thereby generate correction signals, storing said correction signals in a memory, modifying said identification signals generated by said target identification apparatus by an amount indicated by an interpolation performed by said computer between the stored correction signals for the ones of said specific points on said display indicator among which the target trace corresponding to the identification signal being modified by said computer is located to assure that each identification symbol is displayed immediately adjacent to the appropriate target trace.
Claim 5
Independent Claim
255 words
A method for aligning a radar system wherein radar return signals are input via a first circuit path to a positional entry device equipped interactive radar display indicator functioning with a computer and a memory to display targets, and target identification apparatus identifies targets and generates identification signals which are applied via a second circuit path to a display generator which generates video signals that are input to said display indicator to display appropriate identification symbols on said indicator adjacent to the appropriate target traces, comprising the steps of applying a first alignment signal to said first circuit path to display a first test pattern on said display indicator, applying a second alignment signal via said second circuit path to said display generator to display a second test pattern on said display indicator concurrently with the display of said first test pattern, using said positional entry device in an interactive mode of operation to superimpose a multiplicity of specific points of said first test pattern on said second test pattern on said display indicator, and thereby generate correction signals, storing said correction signals in a memory, modifying said identification signals generated by said target identification apparatus by an amount indicated by an interpolation performed by said computer between the stored correction signals for the ones of said specific points on said display indicator among which the target trace corresponding to the identification signal being modified by said computer is located to assure that each identification symbol is displayed immediately adjacent to the appropriate target trace.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |