EP0110282A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image distortion correction method and apparatus
Assignee: Tektronix Inc
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Filing: 1983-11-21
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Granted: —
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Expires: 2003-11-21
Abstract
Abstract An image distortion correction method and apparatus is disclosed. An electron beam generated in a Cathode-Ray-Tube (CRT) sweeps horizontally. Simultaneously therewith, the intensity thereof varies in accordance with an incoming video signal representative of video information. As a result thereof, the video information is transferred to a display of the CRT. Various types of video image distortion appears on the CRT. To compensate for this distortion, the rate at which the video information is transferred to the display of the CRT is varied in accordance with the position of the electron beam during the sweep thereof. Since the video image distortion is a function of the position of the electron beam during the sweep thereof, in accordance with this invention, said rate at which the video information is transferred to the display of the CRT is varied in accordance with the particular distortion being compensated therefor.
Inventors
- 👤 Timothy A. Jenness
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 15:14
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/23; H04N3/233; H04N3/2335
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
An image distortion compensation and correction apparatus for compensating for a-video image distortion of a video image on a display, comprising: first means responsive to a plurality of video input signals for generating a plurality of video output signals representative of said video image in response thereto; second means connected to the first means for varying the rate at which said plurality of video input signals are generated from said first means in accordance with said video image distortion thereby generating said plurality of video output signals therefrom; and third means responsive to said plurality of video output signals for generating said display of said video image.
Claim 2
Dependent Claim
107 words
An image distortion compensation and correction apparatus for compensating for a-video image distortion of a video image on a display, comprising: first means responsive to a plurality of video input signals for generating a plurality of video output signals representative of said video image in response thereto; second means connected to the first means for varying the rate at which said plurality of video input signals are generated from said first means in accordance with said video image distortion thereby generating said plurality of video output signals therefrom; and third means responsive to said plurality of video output signals for generating said display of said video image.
Claim 3
Dependent Claim
35 words
An image distortion compensation and correction apparatus of claim 1 wherein: said distortion is represented by the amplitude of a current; and video signal generation rate is varied according to said amplitude of said current.
Claim 4
Dependent Claim
164 words
The image distortion compensation and correction apparatus of claim 1, wherein said third means comprises: a cathode-ray-tube including an electron beam generating means; and deflection means for deflecting the electron beam produced by said electron beam generating means, the deflected electron beam producing said video image on said cathode ray tube; and wherein said second means comprises: means for developing a position predictable signal representative of a position of the electron beam along a horizontal axis of said cathode-ray-tube during the the deflection thereof; means responsive to said position predictable signal for differentiating said signal thereby producing a rate signal representative of the rate at which said electron beam is deflected along said horizontal axis, and means responsive to the rate signal for developing a plurality of pulses, the frequency of which varies in accordance with the voltage level of said rate signal, the frequency of said plurality of pulses being determinative of the rate at which said plurality of video signals are generated.
Claim 5
Independent Claim
90 words
A method of compensating and correcting for video image distortion of a video image appearing on a display, said video image being produced on said display in response to the generation of a video information signal associated with each picture element of said display, comprising the steps of: varying the rate at which the video information signals associated with the picture elements of said display are generated in accordance with said video image distortion; and producing said video image on said display in response to the rate-varied video information signals.
Claim 6
Independent Claim
90 words
A method of compensating and correcting for video image distortion of a video image appearing on a display, said video image being produced on said display in response to the generation of a video information signal associated with each picture element of said display, comprising the steps of: varying the rate at which the video information signals associated with the picture elements of said display are generated in accordance with said video image distortion; and producing said video image on said display in response to the rate-varied video information signals.
References Cited (Backward Citations)
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