Patent US2365360A successfully refreshed from Google Patents.
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EP0146227A2
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System and method for raster-scan display
Assignee: Tektronix Inc
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Filing: 1984-10-15
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Granted: —
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Expires: 2004-10-15
Abstract
Abstract ©7 In system and method for smooth line raster-scan display, a frame buffer containing a high resolution map of information of an image for display is read so as to furnish plural line stored information for each single line of the raster display. Display circuitry of the system receives the plural line stored information and varyingly weights same to furnish such single line Z-axis information (intensity control) for an X-Y display matrix, such as a CRT display terminal. Means are included in the system for display of the entire frame buffer content on a first fractional basis, e.g., a two thousand line resolution buffer to five hundred line raster. Selection circuitry of the system provides for reading out only a fraction of the frame buffer content, e.g., one-fourth or the five hundred lines thereof, on five hundred raster lines, thus providing true resolution zoom capability.
Inventors
- 👤 Richard B. Preiss
- 👤 John C. Dalrymple
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 13:04
CPC Classifications
G; G06; G06T; G06T3/00; G06T3/40; G06T3/403; G09; G09G; G09G5/00; G09G5/20; G09G5/36; G09G5/39; G09G5/391
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
104 words
A raster scan type display system comprising: (a) display means for providing a raster of scan lines in first given number and responsive to an intensity control signal to effect display in such raster scan lines; (b) frame buffer means for storage of bits of image scan lines, said image scan lines being in second number exceeding said first number; and (c) control means for collecting from said frame buffer means bits from said individual image scan lines and for generating said intensity control signal for an individual such raster scan line responsively to bits collected from plural of said individual image scan lines.
Claim 2
Dependent Claim
104 words
A raster scan type display system comprising: (a) display means for providing a raster of scan lines in first given number and responsive to an intensity control signal to effect display in such raster scan lines; (b) frame buffer means for storage of bits of image scan lines, said image scan lines being in second number exceeding said first number; and (c) control means for collecting from said frame buffer means bits from said individual image scan lines and for generating said intensity control signal for an individual such raster scan line responsively to bits collected from plural of said individual image scan lines.
Claim 3
Dependent Claim
40 words
The system claimed in claim 1 wherein said control means is selectively operable to display in such raster the image collectively defined by said image scan lines or to display in said raster a fractional part of such collective image.
Claim 4
Dependent Claim
20 words
The system claimed in claim 1 wherin the information contained in said frame buffer means stored bits comprises single-plane information.
Claim 5
Dependent Claim
21 words
The system claimed in claim 1 wherein the information contained in said frame buffer means stored bits comprises monochrome based information.
Claim 6
Dependent Claim
111 words
A raster scan type display system comprising: (a) display means for providing a raster of scan lines in first given number and responsive to an intensity control signal to effect image display in such raster scan lines; (b) frame buffer means for storage of bits of image scan lines, said image scan lines being in second number exceeding said first number; and (c) control means for successively receiving bits of individual different such image scan lines, for accumulating received such bits of to plural of said image scan lines and for generating said intensity control signal for an individual such raster scan line responsively to such plural image scan line bits.
Claim 7
Dependent Claim
111 words
A raster scan type display system comprising: (a) display means for providing a raster of scan lines in first given number and responsive to an intensity control signal to effect image display in such raster scan lines; (b) frame buffer means for storage of bits of image scan lines, said image scan lines being in second number exceeding said first number; and (c) control means for successively receiving bits of individual different such image scan lines, for accumulating received such bits of to plural of said image scan lines and for generating said intensity control signal for an individual such raster scan line responsively to such plural image scan line bits.
Claim 8
Dependent Claim
79 words
The system claimed in claim 5 wherein said control means includes first circuit means for successively receiving bits of individual different image scan lines, second circuit means connected to said first circuit means for storage successively of received such bits of each such individual image scan line, and third circuit means connected to both said first circuit means and said second circuit means and operable for concurrent output of image scan line bits received successively by said control means.
Claim 9
Dependent Claim
29 words
The system claimed in claim 6 wherein said control means further includes fourth circuit means responsive to such output image scan line bits for generating said intensity control signal.
Claim 10
Dependent Claim
27 words
The system claimed in claim 7 wherein said fourth circuit means is a digital-to-analog converter of type receiving said output image scan line bits as parallel inputs.
Claim 11
Dependent Claim
26 words
The system claimed in claim 8 wherein said digital-to-analog converter includes means for generating said intensity control signal by different weighting of said parallel inputs thereto.
Claim 12
Dependent Claim
19 words
The system claimed in claim 9 wherein such weight processing effects a Gaussian distribution weighting of said parallel inputs.
Claim 13
Dependent Claim
66 words
The system claimed in claim 6 wherein said first number is an integer N and wherein said second number is an integer M and wherein the numeric ratio of M to N is an integer P, exceeding unity, said system including clock signal generator means for clocking said bits into said first circuit means at P times the rate of operation of said third circuit means.
Claim 14
Dependent Claim
39 words
The system claimed in claim 11 wherein said clock signal generator means is further selectively settable for clocking said bits into said first circuit means at submultiples of P times the rate of operation of said third circuit means.
Claim 15
Dependent Claim
35 words
The system claimed in claim 11 wherein said clock signal generator means is further selectively settable for clocking said bits into said first circuit means at the rate of operation of said third circuit means.
Claim 16
Dependent Claim
99 words
In a method for effecting display of an image on a display unit of N image raster lines, the steps of: (a) storing said image in M stored lines of digital bits, M being selected as an integral multiple of N; (b) selecting a digital bit from each of Q of said M lines, Q being selected as an integer exceeding unity; (c) converting said Q bits selected in said step (b) into an analog signal; and (d) using said analog signal as an intensity control signal in a one of said N raster lines of said display unit.
Claim 17
Dependent Claim
99 words
In a method for effecting display of an image on a display unit of N image raster lines, the steps of: (a) storing said image in M stored lines of digital bits, M being selected as an integral multiple of N; (b) selecting a digital bit from each of Q of said M lines, Q being selected as an integer exceeding unity; (c) converting said Q bits selected in said step (b) into an analog signal; and (d) using said analog signal as an intensity control signal in a one of said N raster lines of said display unit.
Claim 18
Dependent Claim
25 words
The invention claimed in claim 14 wherein said step (c) is further practiced by individually weighting said bits in the course of such signal conversion.
Claim 19
Dependent Claim
18 words
The invention claimed in claim 15 wherein such weighting practice is a Gaussian distribution weighting of said bits.
Claim 20
Dependent Claim
41 words
The invention claimed in claim 14 wherein said step (b) is practiced by selecting said Q bits in sequential subgroupings and by accumulating such subgrouped bits at the rate of M/N times the rate of practice of said signal conversion step.
Claim 21
Dependent Claim
38 words
The invention claimed in claim 17 wherein the rate of selection of said subgroupings is M/N/P times the rate of practice of said conversion step, where P is a number greater than unity and as large as M/N.
References Cited (Backward Citations)
No citation records indexed.
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