US3688028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam intensity compensator
Assignee: Computer Image Corp
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Filing: 1970-09-23
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Granted: 1972-08-29
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Expires: 1990-09-23
Abstract
Abstract A system for automatically controlling the beam intensity of a display cathode ray tube to generate an image of constant brightness despite variances in the size of the image or scanning velocity of the spot produced by the electron beam, including means for generating a beam intensity control voltage comprised of signals which are functions of the size of the image and/or the scan velocity of the spot.
Inventors
- 👤 William C Altemus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:05
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/57; H04N5/59
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
118 words
A method of maintaining an image of constant brightness on a display tube regardless of the size of the image or the scanning velocity of the spot comprising the steps of generating a signal representing the X coordinate size of the displayed image, generating a signal representing the Y coordinate size of the displayed image, generating a first signal from a combination of the X and Y coordinate signals, generating a second signal directly proportional to the scan velocity of the spot, combining the first and second signals with the video signal from a video pickup camera to produce an intensity signal, and applying the intensity signal to control the intensity of the beam of the display tube.
Claim 2
Independent Claim
118 words
A method of maintaining an image of constant brightness on a display tube regardless of the size of the image or the scanning velocity of the spot comprising the steps of generating a signal representing the X coordinate size of the displayed image, generating a signal representing the Y coordinate size of the displayed image, generating a first signal from a combination of the X and Y coordinate signals, generating a second signal directly proportional to the scan velocity of the spot, combining the first and second signals with the video signal from a video pickup camera to produce an intensity signal, and applying the intensity signal to control the intensity of the beam of the display tube.
Claim 3
Dependent Claim
77 words
The method of claim 1 wherein the step of generating the first signal includes the steps of generating a signal representing the product of the X coordinate size voltage and the Y coordinate size voltage, generating a signal representing the product of the X coordinate size voltage and a first constant, generating a signal representing the product of the Y coordinate size voltage and a second constant, and adding these three signals to produce the first signal.
Claim 4
Dependent Claim
40 words
The method of claim 1 wherein the step of generating the second signal includes the steps of adding vectorially an X coordinate velocity signal and a Y coordinate velocity signal to produce a resultant velocity signal representing the second signal.
Claim 5
Dependent Claim
56 words
The method of claim 3 including the step of differentiating the X coordinate velocity signal, squaring the differentiated X coordinate velocity signal, differentiating the Y coordinate velocity signal, squaring the differentiated Y coordinate velocity signal, adding the squared signals, and taking the square root of the sum of the squared signals to produce the second signal.
Claim 6
Dependent Claim
30 words
The method of claim 1 wherein the combining step includes adding the first and second signals to produce a third signal, aNd combining the third signal with the video signal.
Claim 7
Dependent Claim
46 words
The method of claim 5 including the step of taking the square root of the third signal to produce a fourth signal, and combining the fourth signal with the video signal from the video camera to control the intensity of the beam of the display tube.
Claim 8
Dependent Claim
18 words
The method of claim 5 wherein the combining step includes multiplying the third signal by the video signal.
Claim 9
Dependent Claim
34 words
The method of claim 1 including the step of multiplying the absolute value of the X coordinate size signal with the absolute value of the Y coordinate size signal to generate the first signal.
Claim 10
Independent Claim
103 words
A method of maintaining an image of constant brightness on a display tube regardless of the size of the image comprising the steps of generating a signal representing the product of an X coordinate size voltage and a Y coordinate size voltage, generating a signal representing the product of the X coordinate size voltage and a first constant, generating a signal representing the product of the Y coordinate size voltage and a second constant, adding these signals to produce a size compensation signal, and combining the compensation signal with the beam signal of the display tube to control the intensity of the beam.
Claim 11
Independent Claim
103 words
A method of maintaining an image of constant brightness on a display tube regardless of the size of the image comprising the steps of generating a signal representing the product of an X coordinate size voltage and a Y coordinate size voltage, generating a signal representing the product of the X coordinate size voltage and a first constant, generating a signal representing the product of the Y coordinate size voltage and a second constant, adding these signals to produce a size compensation signal, and combining the compensation signal with the beam signal of the display tube to control the intensity of the beam.
Claim 12
Independent Claim
111 words
A method of producing an animated display on a display tube including the generation of animation signals, and of compensating the brightness of the display for variations in the size of the image comprising the steps of generating signals representing the size of the raster on which the image is displayed, generating signals representing the amplitudes of the animation signals, combining these signals to produce a resultant signal directly proportional to the size of the displayed image, combining the resultant signal with a video signal from a video pickup camera to produce an intensity signal, and applying the intensity signal to control the intensity of the beam of the display tube.
Claim 13
Independent Claim
111 words
A method of producing an animated display on a display tube including the generation of animation signals, and of compensating the brightness of the display for variations in the size of the image comprising the steps of generating signals representing the size of the raster on which the image is displayed, generating signals representing the amplitudes of the animation signals, combining these signals to produce a resultant signal directly proportional to the size of the displayed image, combining the resultant signal with a video signal from a video pickup camera to produce an intensity signal, and applying the intensity signal to control the intensity of the beam of the display tube.
Claim 14
Dependent Claim
176 words
In a system for producing an animated display on a display tube from a piece of art work photographed by a video camera, a system for compensating the brightness of the display for variations in the size of the image and the scan velocity of the display tube spot comprising means for generating a signal representing the X coordinate size of the displayed image, means for generating a signal representing the Y coordinate size of the displayed image, means for generating a first signal from a combination of the X and Y coordinate signals, means for generating a second signal directly proportional to the scan velocity of the spot and means for combining the first and second signals with the video signal from the video camera photographing the art work to produce an intensity signal, and means for applying the intensity signal to control the intensity of the beam of the display tube whereby the brightness of the image remains constant as the size of the displayed image and velocity of the beam increases or decreases.
Claim 15
Dependent Claim
176 words
In a system for producing an animated display on a display tube from a piece of art work photographed by a video camera, a system for compensating the brightness of the display for variations in the size of the image and the scan velocity of the display tube spot comprising means for generating a signal representing the X coordinate size of the displayed image, means for generating a signal representing the Y coordinate size of the displayed image, means for generating a first signal from a combination of the X and Y coordinate signals, means for generating a second signal directly proportional to the scan velocity of the spot and means for combining the first and second signals with the video signal from the video camera photographing the art work to produce an intensity signal, and means for applying the intensity signal to control the intensity of the beam of the display tube whereby the brightness of the image remains constant as the size of the displayed image and velocity of the beam increases or decreases.
Claim 16
Dependent Claim
82 words
The system of claim 11 wherein the means for generating the first signal includes means for generating a signal representing the product of the X coordinate size voltage and the Y coordinate size voltage, means for generating a signal representing the product of the X coordinate size voltage and a first constant, means for generating a signal representing the product of the Y coordinate size voltage and a second constant, and means for adding these three signals to produce the first signal.
Claim 17
Dependent Claim
39 words
The system of claim 11 wherein the means for generating the second signal includes means for adding vectorially an X coordinate velocity signal and a Y coordinate velocity signal to produce a resultant velocity signal representing the second signal.
Claim 18
Dependent Claim
65 words
The system of claim 13 including means for differentiating the X coordinate velocity signal, means for squaring the differentiated X coordinate velocity signal, means for differentiating the Y coordinate velocity signal, means for squaring the differentiated Y Coordinate velocity signal, means for adding the squared signals, and means for taking the square root of the sum of the squared signals to produce the second signal.
Claim 19
Dependent Claim
34 words
The system of claim 11 wherein the combining means includes means for adding the first and second signals to produce a third signal, and means for combining the third signal with the video signal.
Claim 20
Dependent Claim
32 words
The method of claim 15 including means for taking the square root of the third signal to produce a fourth signal, and means for combining the fourth signal with the video signal.
Claim 21
Dependent Claim
22 words
The system of claim 15 wherein the last named combining means includes means for multiplying the third signal by the video signal.
Claim 22
Dependent Claim
33 words
The system of claim 11 including means for multiplying the absolute value of the X coordinate size signal with the absolute value of the Y coordinate size signal to generate the first signal.
Claim 23
Dependent Claim
173 words
In a system for producing an animating display on a CRT from a piece of art work photographed by a video camera, a system for compensating the brightness of the image for variations in image size and scan velocity comprising means for generating a signal representing the product of an X coordinate size voltage and a Y coordinate size voltage, means for generating a signal representing the product of the X coordinate size voltage and a first constant, means for generating a signal representing the product of the Y coordinate size voltage and a second constant, means for adding these three signals to produce a first signal, means for adding vectorially an X coordinate velocity signal and a Y coordinate velocity signal to produce a resultant velocity signal representing a second signal, means for adding the first and second signals to produce a third signal, and means for combining the third signal with the video signal from the video camera to produce a beam signal for controlling the intensity of the CRT beam.
Claim 24
Dependent Claim
173 words
In a system for producing an animating display on a CRT from a piece of art work photographed by a video camera, a system for compensating the brightness of the image for variations in image size and scan velocity comprising means for generating a signal representing the product of an X coordinate size voltage and a Y coordinate size voltage, means for generating a signal representing the product of the X coordinate size voltage and a first constant, means for generating a signal representing the product of the Y coordinate size voltage and a second constant, means for adding these three signals to produce a first signal, means for adding vectorially an X coordinate velocity signal and a Y coordinate velocity signal to produce a resultant velocity signal representing a second signal, means for adding the first and second signals to produce a third signal, and means for combining the third signal with the video signal from the video camera to produce a beam signal for controlling the intensity of the CRT beam.
Claim 25
Dependent Claim
37 words
The system of claim 19 wherein the combining means include means for multiplying the third signal by the video signal from the video camera to produce a beam signal for controlling the intensity of the CRT beam.
Claim 26
Dependent Claim
49 words
The system of claim 19 including means for taking the square root of the third signal to produce a fourth signal, and means for multiplying the fourth signal by the video signal from the video camera to produce a beam signal for controlling the intensity of the CRT beam.
Claim 27
Independent Claim
135 words
A method of producing an animated display on a display tube including the generation of animation signals, and of compensating the brightness of the display for variations in the size of the image and the scan velocity of the display tube spot comprising the steps of generating signals representing the size of the raster on which the image is displayed, generating signals representing the amplitudes of the animation signals, combining these signals to produce a first signal directly proportional to the size of the displayed image, generating a second signal directly proportional to the scan velocity of the spot, combining the first and second signals with a video signal from a video pickup camera to produce an intensity signal, and applying the intensity signal to control the intensity of the beam of the display tube.
Claim 28
Independent Claim
135 words
A method of producing an animated display on a display tube including the generation of animation signals, and of compensating the brightness of the display for variations in the size of the image and the scan velocity of the display tube spot comprising the steps of generating signals representing the size of the raster on which the image is displayed, generating signals representing the amplitudes of the animation signals, combining these signals to produce a first signal directly proportional to the size of the displayed image, generating a second signal directly proportional to the scan velocity of the spot, combining the first and second signals with a video signal from a video pickup camera to produce an intensity signal, and applying the intensity signal to control the intensity of the beam of the display tube.
Claim 29
Dependent Claim
113 words
The method of claim 22 wherein the step of generating signals representing the size of the raster further comprises the steps of generating a signal representing the X coordinate size of the raster on which the image is displayed, and generating a signal representing the Y coordinate size of the raster on which the image is displayed, and the step of generating signals representing the amplitudes of the animation signals further comprises the steps of generating a signal representing the X coordinate amplitude of the animation signal, and generating a signal representing the Y coordinate amplitude of the animation signal, and combining these X and Y coordinate signals to produce the first signal.
Claim 30
Dependent Claim
89 words
The method of claim 23 wherein tHe last named combining step includes adding the signal representing the X coordinate size of the raster to the signal representing the X coordinate amplitude of the animation signal to produce a X coordinate size signal, and adding the signal representing the Y coordinate size of the raster to the signal representing the Y coordinate amplitude of the animation signal to produce a coordinate size and multiplying the X coordinate size signal by the Y coordinate size signal to produce the first signal.
Claim 31
Independent Claim
167 words
A system for producing an animated image on a display tube including means for generating animation signals, and for compensating the brightness of the display for variations in the size of the image and the scan velocity of the display tube spot comprising means for generating signals representing the size of the raster on which the image is displayed, means for generating signals representing the amplitudes of the animation signals, the signals representing the amplitudes of the animation signals being of only those frequencies above the approximate frame frequency of the display, means for combining these signals to produce a first signal directly proportional to the size of the displayed image, means for generating a second signal directly proportional to the scan velocity of the spot, and means for combining the first and second signals with the video signal from a video pickup camera to produce an intensity signal, and means for applying the intensity signal to control the intensity of the beam of the display tube.
Claim 32
Independent Claim
167 words
A system for producing an animated image on a display tube including means for generating animation signals, and for compensating the brightness of the display for variations in the size of the image and the scan velocity of the display tube spot comprising means for generating signals representing the size of the raster on which the image is displayed, means for generating signals representing the amplitudes of the animation signals, the signals representing the amplitudes of the animation signals being of only those frequencies above the approximate frame frequency of the display, means for combining these signals to produce a first signal directly proportional to the size of the displayed image, means for generating a second signal directly proportional to the scan velocity of the spot, and means for combining the first and second signals with the video signal from a video pickup camera to produce an intensity signal, and means for applying the intensity signal to control the intensity of the beam of the display tube.
Claim 33
Dependent Claim
44 words
The system of claim 25 including means for generating DC signals representing the size of the animation signals during a selected time interval, and means for combining the DC signals with the signals representing the size of the raster to produce the first signal.
Claim 34
Dependent Claim
21 words
The system of claim 26 wherein the time interval is selected to be no greater than the period of each frame.
Claim 35
Dependent Claim
36 words
The system of claim 27 including means for detecting the peak amplitudes of the animation signals during each time interval, and wherein the DC signals are the signals representing the peak amplitudes of the animation signals.
Claim 36
Dependent Claim
21 words
The system of claim 25 wherein the second signal includes only those frequencies below the approximate frame frequency of the display.
Claim 37
Dependent Claim
40 words
The system of claim 29 wherein the means for generating the second signal further includes means for adding vectorially an X coordinate velocity signal and a Y coordinate velocity signal to produce a resultant velocity signal representing the second signal.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |