US3740608A
Expired / Lapsed
US
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Scanning correction methods and systems utilizing stored digital correction values
Assignee: Alphanumeric Inc
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Filing: 1970-08-18
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Granted: 1973-06-19
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Expires: 1990-08-18
Abstract
Abstract There is disclosed a method and several embodiments of apparatus for the correction of pin-cushion and other distortions in a cathode-ray tube wherein there are stored digital correction values associated with particular regions of the tube. As these regions are called for the associated correction values are used to modify the electron-beam deflection, focus, and intensity signals.
Inventors
- 👤 S Manber
- 👤 Govern M Mc
- 👤 W Stupar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/04; H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/23; H04N3/233; H04N3/2335
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
A scanning system comprising a scanning beam of electromagnetic energy, a surface member to be scanned by said scanning beam, means for deflecting said scanning beam to impinge at a point on said surface member in accordance with the amplitude of a received deflection signal, means for storing a plurality of sets of correction values in digital form, each of said sets of correction values being associated with a different particular region of said surface member, means for generating a deflection value in digital form, associated with a desired point on said surface member, means responsive to the generated deflection value for selecting from said storing means the set of correction values of the particular region containing the desired point on said surface member, means for modifying the generated deflection value with at least some of the correction values of the selected set of correction values, and means for converting the so modified deflection value to a deflection signal which is transmitted to said deflecting means.
Claim 2
Dependent Claim
166 words
A scanning system comprising a scanning beam of electromagnetic energy, a surface member to be scanned by said scanning beam, means for deflecting said scanning beam to impinge at a point on said surface member in accordance with the amplitude of a received deflection signal, means for storing a plurality of sets of correction values in digital form, each of said sets of correction values being associated with a different particular region of said surface member, means for generating a deflection value in digital form, associated with a desired point on said surface member, means responsive to the generated deflection value for selecting from said storing means the set of correction values of the particular region containing the desired point on said surface member, means for modifying the generated deflection value with at least some of the correction values of the selected set of correction values, and means for converting the so modified deflection value to a deflection signal which is transmitted to said deflecting means.
Claim 3
Dependent Claim
139 words
The scanning system of claim 1, wherein said deflecting means comprises first and second deflecting circuits for separately deflecting said beam in first and second directions, respectively, wherein each set of correction values includes subsets of correction values associated with said first and second directions, wherein said deflection value generating means simultaneously generates first and second deflection values associated with said first and second directions, respectively, wherein said modifying means utilizes correction values from each of said subsets to modify said first deflection value and different correction values from each of said subsets to modify said second deflection value, and wherein said converting means converts the first modified value to a first deflection signal for transmission to said first deflection circuit and converts the second modified value to a second deflection signal for transmission to said second deflection circuit.
Claim 4
Dependent Claim
57 words
The scanning signal of claim 1 further comprising sweeping means for controlling the beam to sweep a given distance in a given direction from the desired point and means utilizing some of said correction values for controlling said sweeping means to continuously modify the direction of the sweep of the beam during the time of the sweep.
Claim 5
Independent Claim
118 words
The method of correcting distortions in a beam deflectable to different points on a surface member comprising the steps of recording and digitally storing digital values related to desired parameters of the beam at particular points on the surface member,at least one of said parameters being related to the intensity of the beam, generating digital deflection values for indicating the points to which the beam is to be deflected, deflecting the beam to a particular point indicated by one of said digital deflection values, selecting the digitally stored digital values associated with said particular point by utilizing said one digital deflection value and modifying the state of the beam in accordance with the selected digitally stored digital value.
Claim 6
Independent Claim
118 words
The method of correcting distortions in a beam deflectable to different points on a surface member comprising the steps of recording and digitally storing digital values related to desired parameters of the beam at particular points on the surface member,at least one of said parameters being related to the intensity of the beam, generating digital deflection values for indicating the points to which the beam is to be deflected, deflecting the beam to a particular point indicated by one of said digital deflection values, selecting the digitally stored digital values associated with said particular point by utilizing said one digital deflection value and modifying the state of the beam in accordance with the selected digitally stored digital value.
Claim 7
Independent Claim
119 words
The method of correcting distortions in a beam deflectable to different points on a surface member comprising the steps of recording and digitally storing digital values related to desired parameters of the beam at particular points on the surface member, at least one of said parameters being related to the focus of the beam, generating digital deflection values for indicating the points to which the beam is to be deflected, deflecting the beam to a particular point indicated by one of said digital deflection values, selecting the digitally stored digital values associated with said particular point by utilizing said one digital deflection value and modifying the state of the beam in accordance with the selected digitally stored digital value.
Claim 8
Independent Claim
119 words
The method of correcting distortions in a beam deflectable to different points on a surface member comprising the steps of recording and digitally storing digital values related to desired parameters of the beam at particular points on the surface member, at least one of said parameters being related to the focus of the beam, generating digital deflection values for indicating the points to which the beam is to be deflected, deflecting the beam to a particular point indicated by one of said digital deflection values, selecting the digitally stored digital values associated with said particular point by utilizing said one digital deflection value and modifying the state of the beam in accordance with the selected digitally stored digital value.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |