US4633144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic focus signal shaper
Assignee: Tektronix Inc
•
Filing: 1984-08-20
•
Granted: 1986-12-30
•
Expires: 2004-08-20
Abstract
Abstract A dynamic signal shaper for a cathode ray tube display system is described. In some cathode ray tubes an electromagnetic lens is driven by a correction signal derived from the beam deflection signals. The required correction signal is proportional to the product of the squares of the horizontal and vertical deflection signals. The described signal shaper incorporates means for making the constant of proportionality independently adjustable for beam deflections in each corner of cathode ray tube screen.
Inventors
- 👤 Barry A. McKibben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:28
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/26; G; G01; G01R; G01R13/00; G01R13/20; G01R13/22
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
92 words
A dynamic focusing signal shaper for generating a signal for adjusting focus in the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, a first multiplier for multiplying the output of the summing means, a second multiplier for multiplying the output of the differencing means, and means for adding the outputs of the first and second multipliers and outputting the focus adjustment signal.
Claim 2
Dependent Claim
92 words
A dynamic focusing signal shaper for generating a signal for adjusting focus in the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, a first multiplier for multiplying the output of the summing means, a second multiplier for multiplying the output of the differencing means, and means for adding the outputs of the first and second multipliers and outputting the focus adjustment signal.
Claim 3
Dependent Claim
130 words
A dynamic focusing signal shaper for generating a signal for adjusting focus in the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, a first and second limiter coupled to receive the output of the summing means, a third and fourth limiter coupled to receive the output of the differencing means, a first multiplier coupled to receive and multiply the outputs of the first and second limiters, a second multiplier coupled to receive and multiply the outputs of the third and fourth limiters, and means for adding the outputs of the first and second multipliers and outputting the focus adjustment signal.
Claim 4
Dependent Claim
130 words
A dynamic focusing signal shaper for generating a signal for adjusting focus in the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, a first and second limiter coupled to receive the output of the summing means, a third and fourth limiter coupled to receive the output of the differencing means, a first multiplier coupled to receive and multiply the outputs of the first and second limiters, a second multiplier coupled to receive and multiply the outputs of the third and fourth limiters, and means for adding the outputs of the first and second multipliers and outputting the focus adjustment signal.
Claim 5
Dependent Claim
62 words
A dynamic focusing signal shaper according to claim 2 wherein the first and third limiters have a gain of one for inputs greater than zero and a gain of zero for inputs less than zero and wherein the second and fourth limiters have a gain of zero for inputs greater than zero and a gain of one for inputs less than zero.
Claim 6
Dependent Claim
14 words
A dynamic focusing signal shaper according to claim 3 wherein the limiters comprise diodes.
Claim 7
Dependent Claim
20 words
A dynamic focusing signal shaper according to claim 3 including means for independently scaling the values provided by said limiters.
Claim 8
Dependent Claim
142 words
A dynamic focusing signal shaper for generating a signal for adjusting focus in the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second limiters coupled to receive the output of the summing means, third and fourth limiters coupled to receive the output of the differencing means, means for independently scaling the outputs of the first, second, third and fourth limiters, a first multiplier coupled to receive and multiply the outputs of the first and second limiters, a second multiplier coupled to receive and multiply the outputs of the third and fourth limiters, and means for adding the outputs of the first and second multipliers and outputting the focus adjustment signal.
Claim 9
Dependent Claim
142 words
A dynamic focusing signal shaper for generating a signal for adjusting focus in the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second limiters coupled to receive the output of the summing means, third and fourth limiters coupled to receive the output of the differencing means, means for independently scaling the outputs of the first, second, third and fourth limiters, a first multiplier coupled to receive and multiply the outputs of the first and second limiters, a second multiplier coupled to receive and multiply the outputs of the third and fourth limiters, and means for adding the outputs of the first and second multipliers and outputting the focus adjustment signal.
Claim 10
Dependent Claim
156 words
A dynamic focus signal shaper for generating a signal for adjusting focus in the corners or a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second limiters coupled to receive the output of the summing means, third and fourth limiters coupled to receive the output of the differencing means, a first, a second, a third and a fourth gain controller coupled to receive the outputs of the first, second, third and fourth limiting means respectively, a first multiplier coupled to receive and multiply the outputs of the first and second gain controllers, a second multiplier coupled to receive and multiply the outputs of the third and fourth gain controllers, and means for adding the outputs of the first and second multipliers for outputting the focus adjustment signal.
Claim 11
Dependent Claim
156 words
A dynamic focus signal shaper for generating a signal for adjusting focus in the corners or a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second limiters coupled to receive the output of the summing means, third and fourth limiters coupled to receive the output of the differencing means, a first, a second, a third and a fourth gain controller coupled to receive the outputs of the first, second, third and fourth limiting means respectively, a first multiplier coupled to receive and multiply the outputs of the first and second gain controllers, a second multiplier coupled to receive and multiply the outputs of the third and fourth gain controllers, and means for adding the outputs of the first and second multipliers for outputting the focus adjustment signal.
Claim 12
Dependent Claim
16 words
A dynamic focus signal shaper according to claim 7 wherein the gain controllers comprise variable resistors.
Claim 13
Dependent Claim
156 words
A dynamic focusing signal shaper for generating a signal for adjusting focus on the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second gain controllers coupled to receive the output of the summing means, third and fourth gain controllers coupled to receive the output of the differencing means, a first, a second, a third and a fourth limiter coupled to receive the outputs of the first, second, third and fourth gain controllers respectively, a first four-quadrant multiplier coupled to receive and multiply the outputs of the first and second limiters, a second four-quadrant multiplier coupled to receive and multiply the outputs of the third and fourth limiters, and means for adding the outputs of the first and second multipliers and outputting a focusing signal.
Claim 14
Dependent Claim
156 words
A dynamic focusing signal shaper for generating a signal for adjusting focus on the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second gain controllers coupled to receive the output of the summing means, third and fourth gain controllers coupled to receive the output of the differencing means, a first, a second, a third and a fourth limiter coupled to receive the outputs of the first, second, third and fourth gain controllers respectively, a first four-quadrant multiplier coupled to receive and multiply the outputs of the first and second limiters, a second four-quadrant multiplier coupled to receive and multiply the outputs of the third and fourth limiters, and means for adding the outputs of the first and second multipliers and outputting a focusing signal.
Claim 15
Dependent Claim
14 words
A dynamic focusing signal shaper according to claim 9 wherein the limiters comprise diodes.
Claim 16
Dependent Claim
163 words
A dynamic focusing signal shaper for generating a signal for adjusting focus in the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second diodes coupled with opposite polarity to receive the output of the summing means, third and a fourth diodes coupled with opposite polarity to receive the output of the differencing means, a first, a second, a third and a fourth variable resistor coupled to receive the outputs of the first, second, third and fourth diodes respectively, a first four-quadrant multiplier coupled to receive and multiply the outputs of the first and second variable resistors, a second four-quadrant multiplier coupled to receive and multiply the outputs of the third and fourth variable resistors, and means for adding the outputs of the first and second multipliers and outputting a focusing signal.
Claim 17
Dependent Claim
163 words
A dynamic focusing signal shaper for generating a signal for adjusting focus in the corners of a cathode-ray-tube screen, the shaper comprising: a source of horizontal deflection signal, a source of vertical deflection signal, means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second diodes coupled with opposite polarity to receive the output of the summing means, third and a fourth diodes coupled with opposite polarity to receive the output of the differencing means, a first, a second, a third and a fourth variable resistor coupled to receive the outputs of the first, second, third and fourth diodes respectively, a first four-quadrant multiplier coupled to receive and multiply the outputs of the first and second variable resistors, a second four-quadrant multiplier coupled to receive and multiply the outputs of the third and fourth variable resistors, and means for adding the outputs of the first and second multipliers and outputting a focusing signal.
Claim 18
Dependent Claim
124 words
A dynamic signal shaper for receiving horizontal and vertical deflection signals and generating a focus correction signal for application to a focus element of a cathode-ray tube, the shaper comprising: means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second limiters coupled to receive the output of the summing means, third and fourth limiters coupled to receive the output of the differencing means, a first multiplier coupled to receive and multiply the outputs of the first and second limiters, a second multiplier coupled to receive and multiply the outputs of the third and fourth limiters, and means for adding the outputs of the first and second multipliers and outputting the focus correction signal.
Claim 19
Dependent Claim
124 words
A dynamic signal shaper for receiving horizontal and vertical deflection signals and generating a focus correction signal for application to a focus element of a cathode-ray tube, the shaper comprising: means for summing the horizontal and vertical deflection signals, means for differencing the horizontal and vertical deflection signals, first and second limiters coupled to receive the output of the summing means, third and fourth limiters coupled to receive the output of the differencing means, a first multiplier coupled to receive and multiply the outputs of the first and second limiters, a second multiplier coupled to receive and multiply the outputs of the third and fourth limiters, and means for adding the outputs of the first and second multipliers and outputting the focus correction signal.
Claim 20
Dependent Claim
60 words
A signal shaper according to claim 12, wherein the first and third limiters have a gain of one for inputs greater than zero and a gain of zero for inputs less than zero and wherein the second and fourth limiters have a gain of zero for inputs greater than zero and a gain of one for inputs less than zero.
Claim 21
Dependent Claim
13 words
A dynamic signal shaper according to claim 13, wherein the limiters comprise diodes.
Claim 22
Dependent Claim
19 words
A dynamic signal shaper according to claim 12, including means for independently scaling the outputs provided by said limiters.
Claim 23
Dependent Claim
42 words
A dynamic signal shaper according to claim 15, wherein the means for independently scaling the outputs provided by the limiters comprise first, second, third and fourth gain controllers connected to receive the outputs of the first, second, third and fourth limiters respectively.
Claim 24
Dependent Claim
16 words
A dynamic signal shaper according to claim 16, wherein each gain controller is a variable resistor.
Claim 25
Dependent Claim
52 words
A dynamic signal shaper according to claim 12, wherein the first multiplier is coupled to form the square of the difference between the outputs of the first and second limiters and the second multiplier is coupled to form the square of the difference between the outputs of the third and fourth multipliers.
References Cited (Backward Citations)
US3961223A
Cited
US4249112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |