US3668463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Raster correction circuit utilizing vertical deflection signals and high voltage representative signals to modulate the voltage regulator circuit
Assignee: RCA Licensing Corp
•
Filing: 1970-05-15
•
Granted: 1972-06-06
•
Expires: 1990-05-15
Abstract
Abstract A raster correction circuit for a television receiver combines vertical deflection rate signals and high voltage representative signals and couples them to a control transistor which varies the bias on a regulator transistor to vary the energy supplied to the deflection circuit during each raster field in a manner to correct for side pincushion distortion.
Inventors
- 👤 Lawrence Edward Smith
- 👤 Robert Joseph Gries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:16
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/23; H04N3/233
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
197 words
In a deflection system of the type including a deflection output stage to develop a first deflection current for a deflection winding associated with a kinescope display device having a relatively wide deflection angle and for generating high voltage power for said kinescope, a raster correction circuit comprising: a voltage regulator including control means for varying the input energy to said deflection system, a source of second deflection current signals of a frequency equal to the field deflection rate utilized to display an image on said kinescope, first coupling means for coupling signals from said source of second deflection signals to said control means of said voltage regulator to modulate the input energy to the said deflection system in a manner to compensate for side pincushion distortion in the raster; a source of signals representative of the kinescope high voltage supply; and second means coupling the alternating current components of said source of high voltage representative signals occurring at said field deflection rate to said first coupling means to apply high voltage variations at said field deflection rate to said control means of said voltage regulator for providing additional correction for side pincushion distortion in said raster.
Claim 2
Dependent Claim
197 words
In a deflection system of the type including a deflection output stage to develop a first deflection current for a deflection winding associated with a kinescope display device having a relatively wide deflection angle and for generating high voltage power for said kinescope, a raster correction circuit comprising: a voltage regulator including control means for varying the input energy to said deflection system, a source of second deflection current signals of a frequency equal to the field deflection rate utilized to display an image on said kinescope, first coupling means for coupling signals from said source of second deflection signals to said control means of said voltage regulator to modulate the input energy to the said deflection system in a manner to compensate for side pincushion distortion in the raster; a source of signals representative of the kinescope high voltage supply; and second means coupling the alternating current components of said source of high voltage representative signals occurring at said field deflection rate to said first coupling means to apply high voltage variations at said field deflection rate to said control means of said voltage regulator for providing additional correction for side pincushion distortion in said raster.
Claim 3
Dependent Claim
34 words
A circuit as defined in claim 1 wherein said first coupling means includes means for integrating said signals from said source of second deflection signals to develop a parabolically varying side pincushion correction signal.
Claim 4
Dependent Claim
46 words
A circuit as defined in claim 2 wherein said first coupling means further includes a transistor having a control terminal and an output terminal, said side pincushion correction signals being applied to said control terminal and said output terminal being coupled to said voltage regulator circuit.
Claim 5
Dependent Claim
31 words
A circuit as defined in claim 3 wherein said signals representative of said high voltage variations at said field deflection rate are capacitively coupled to said control terminal of said transistor.
Claim 6
Dependent Claim
125 words
In a television receiver including a non-dissipative voltage regulator of the type in which the input energy to the horizontal deflection system is varied in response to variations in kinescope beam current and power supply voltage so as to maintain relatively constant scan width, a side pincushion correction circuit including: a source of vertical deflection current, control means coupled to said source of vertical deflection current, and to said voltage regulator circuit to vary the horizontal deflection current at a vertical deflection rate, thereby correcting for side pincushion distortion, a kinescope high voltage supply, and a source of signals representative of vertical deflection frequency variations in said kinescope high voltage supply, said source coupled to said control means thereby proviDing an additional raster correction signal.
Claim 7
Dependent Claim
125 words
In a television receiver including a non-dissipative voltage regulator of the type in which the input energy to the horizontal deflection system is varied in response to variations in kinescope beam current and power supply voltage so as to maintain relatively constant scan width, a side pincushion correction circuit including: a source of vertical deflection current, control means coupled to said source of vertical deflection current, and to said voltage regulator circuit to vary the horizontal deflection current at a vertical deflection rate, thereby correcting for side pincushion distortion, a kinescope high voltage supply, and a source of signals representative of vertical deflection frequency variations in said kinescope high voltage supply, said source coupled to said control means thereby proviDing an additional raster correction signal.
Claim 8
Dependent Claim
160 words
In a television receiver including a non-dissipative voltage regulator of the type in which the input energy to the horizontal deflection system is varied in response to variations in kinescope beam current and power supply voltage so as to maintain relatively constant scan width, a side pincushion correction circuit including: a source of vertical deflection current for providing side pincushion correction signals; a kinescope high voltage supply; a source of signals representative of vertical deflection frequency variations in said kinescope high voltage supply for providing an additional raster correction signal, control means including a control transistor coupled to said voltage regulator circuit and to said source of vertical deflection current and to said source of signals representative of vertical deflection frequency variations in said kinescope high voltage supply, said control transistor having its collector current responsive to said side pincushion and said additional raster correction signal to vary the input signal applied to a control element of said voltage regulator.
Claim 9
Dependent Claim
160 words
In a television receiver including a non-dissipative voltage regulator of the type in which the input energy to the horizontal deflection system is varied in response to variations in kinescope beam current and power supply voltage so as to maintain relatively constant scan width, a side pincushion correction circuit including: a source of vertical deflection current for providing side pincushion correction signals; a kinescope high voltage supply; a source of signals representative of vertical deflection frequency variations in said kinescope high voltage supply for providing an additional raster correction signal, control means including a control transistor coupled to said voltage regulator circuit and to said source of vertical deflection current and to said source of signals representative of vertical deflection frequency variations in said kinescope high voltage supply, said control transistor having its collector current responsive to said side pincushion and said additional raster correction signal to vary the input signal applied to a control element of said voltage regulator.
Claim 10
Dependent Claim
32 words
A circuit as defined in claim 6 wherein said control means further includes an integrating circuit for developing a parabolically varying side pincushion correction signal in response to said vertical deflection waveform.
Claim 11
Dependent Claim
64 words
A circuit as defined in claim 6 wherein said source of signals representative of said vertical deflection frequency variations in said kinescope high voltage supply comprises: a capacitive voltage divider coupled from a focus voltage supply associated with said kinescope to ground, and means coupling a signal from a junction of capacitors in said voltage divider to a base terminal of said control transistor.
Claim 12
Dependent Claim
67 words
A circuit as defined in claim 6 wherein said source of signals representative of said vertical deflection frequency variations in said kinescope high voltage supply comprises: a resistive current path having kinescope beam current flowing therein, said resistive path having a terminal at which is developed a voltage representative of beam current variations, and capacitive means coupling said voltage to a base terminal of said control transistor.
Claim 13
Dependent Claim
104 words
In a television receiver employing a kinescope having a deflection angle greater than 90* and employing a side pincushion correction circuit of the type which couples vertical deflection rate parabolically varying signals to a voltage regulator which varies the input voltage to the horizontal deflection system, an improvement comprising: a source of signals representative of vertical deflection rate variations in a kinescope high voltage supply, and means coupling said signals to said voltage regulator to vary the input voltage to said horizontal deflection system in a manner to compensate for raster distortion caused by said vertical rate variations in said kinescope high voltage supply.
Claim 14
Dependent Claim
104 words
In a television receiver employing a kinescope having a deflection angle greater than 90* and employing a side pincushion correction circuit of the type which couples vertical deflection rate parabolically varying signals to a voltage regulator which varies the input voltage to the horizontal deflection system, an improvement comprising: a source of signals representative of vertical deflection rate variations in a kinescope high voltage supply, and means coupling said signals to said voltage regulator to vary the input voltage to said horizontal deflection system in a manner to compensate for raster distortion caused by said vertical rate variations in said kinescope high voltage supply.
Claim 15
Dependent Claim
165 words
In a television receiver employing a kinescope having a 110* deflection angle and including a kinescope high voltage supply, and further including a non-dissipative voltage regulator coupled to a horizontal deflection output stage to maintain raster width relatively constant with power supply and beam current variations, a raster correction circuit comprising: a source of vertical deflection rate signals having a generally sawtooth waveform, means for integrating said vertical sawtooth waveform to develop a parabolic waveshape side pincushion correction signal, a control transistor having base, collector and emitter terminals, said pincushion correction signals being applied to said base terminal, and said collector terminal being coupled to a control element of said voltage regulator whereby collector current variations in said control transistor causes said raster width to vary in a manner to compensate for side pincushion distortion, and a source of additioNal raster correction signals representative of vertical rate variations in said kinescope high voltage supply, said source coupled to said control element of said voltage regulator.
Claim 16
Dependent Claim
165 words
In a television receiver employing a kinescope having a 110* deflection angle and including a kinescope high voltage supply, and further including a non-dissipative voltage regulator coupled to a horizontal deflection output stage to maintain raster width relatively constant with power supply and beam current variations, a raster correction circuit comprising: a source of vertical deflection rate signals having a generally sawtooth waveform, means for integrating said vertical sawtooth waveform to develop a parabolic waveshape side pincushion correction signal, a control transistor having base, collector and emitter terminals, said pincushion correction signals being applied to said base terminal, and said collector terminal being coupled to a control element of said voltage regulator whereby collector current variations in said control transistor causes said raster width to vary in a manner to compensate for side pincushion distortion, and a source of additioNal raster correction signals representative of vertical rate variations in said kinescope high voltage supply, said source coupled to said control element of said voltage regulator.
References Cited (Backward Citations)
US3237048A
Cited
US3571653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |