Patent US4228432A successfully refreshed from Google Patents.
US4228432A
Expired / Lapsed
US
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Raster scan generator for plan view display
Assignee: United States Department of the Navy
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Filing: 1979-08-28
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Granted: 1980-10-14
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Expires: 1999-08-28
Abstract
Abstract A digital apparatus for generating a raster whose scan parameters can be altered and controlled by an external program. In addition to standard horizontal sweep, the raster can display a "waterfall" scan, range bearing sweep and various other geometrical patterns. A selector switch permits the raster scan unit to be selectively connected to either a computer or a control panel which provide the parameters for specifying any one raster.
Inventors
- 👤 Scott R. Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:23
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
A raster scan generator of the type receiving instructions from an external source and for generating different formats of rasters for a plan view display comprising, interface means connected with an external source for receiving parameters for raster patterns, an angle accumulator connected with said interface means for computing angles of rotation for successive lines of a raster pattern, and providing incremental horizontal and vertical values for generating each line of a raster pattern, position accumulator means connected with said angle accumulator for calculating the starting position of each raster line, for computing the position sweep of each raster line and for generating a blanking signal for said plan view display, and time means generating timing and sequencing signals for generating each raster line.
Claim 2
Dependent Claim
124 words
A raster scan generator of the type receiving instructions from an external source and for generating different formats of rasters for a plan view display comprising, interface means connected with an external source for receiving parameters for raster patterns, an angle accumulator connected with said interface means for computing angles of rotation for successive lines of a raster pattern, and providing incremental horizontal and vertical values for generating each line of a raster pattern, position accumulator means connected with said angle accumulator for calculating the starting position of each raster line, for computing the position sweep of each raster line and for generating a blanking signal for said plan view display, and time means generating timing and sequencing signals for generating each raster line.
Claim 3
Dependent Claim
63 words
A raster scan generator of the type receiving instructions from an external source and for generating different formats of rasters for a plan view display as set forth in claim 1 wherein said position accumulator means includes a horizontal accumulator and a vertical accumulator for calculating the starting position of each raster line and for computing the position sweep for each raster line.
Claim 4
Dependent Claim
50 words
A raster scan generator of the type receiving instructions from an external source and for generating different formats of rasters for a plan view display as set forth in claim 1 having switching means for selectively connecting said raster scan generator to an external computer and an external control panel.
Claim 5
Independent Claim
81 words
A method of generating different formats of rasters for a plan view display from data received from an external source comprising the steps of, computing the angle of rotation of successive lines in a raster and calculating the incremental change of horizontal and vertical values used to generate each line in a raster, and then generating the starting position of each raster line by adding the incremental changes of horizontal and vertical values to starting values received from said external source.
Claim 6
Independent Claim
81 words
A method of generating different formats of rasters for a plan view display from data received from an external source comprising the steps of, computing the angle of rotation of successive lines in a raster and calculating the incremental change of horizontal and vertical values used to generate each line in a raster, and then generating the starting position of each raster line by adding the incremental changes of horizontal and vertical values to starting values received from said external source.
Claim 7
Dependent Claim
40 words
A method of generating different formats of rasters for a plan view display from data received from an external source as set forth in claim 4 including the step of blanking the display at the beginning of each raster line.
Claim 8
Dependent Claim
74 words
A method of generating different formats of rasters for a plan view display from data received from an external source as set forth in claim 4 wherein the step of computing the angle of rotation of successive lines in a raster and calculating the incremental changes of horizontal and vertical values used to generate each line includes the step of using outputs from an angle computer as an address to a sine/cosine lookup table.
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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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |