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RE28631 |
High voltage deflection correction in CRT displays
The X and Y deflection voltages for a CRT display are corrected to accommodate excursions in the acceleration or anode voltage of a CRT display by multiplication with a signal which is a function...
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3916254 |
Adjustable pincushion correction circuit
In a television receiver, a north-south pincushion correction circuit includes a switching transistor having a variable on-time controlled by a variable DC bias to phase shift a horizontal sawtooth...
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3914651 |
Cathode, ray tube structures
A cathode ray tube gun structure for minor deflection of an electron beam and employing electronic beam deflecting electrodes ultimately controlled by a deflection signal at a low voltage for minor...
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3914652 |
Color television display apparatus provided with a modulator for generating a correction current for correcting deflection errors
Color television display apparatus in which the modulator for generating a difference current for correcting astigmatic deflection errors applied to at least one deflection coil is also connected...
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3914650 |
Television display apparatus provided with a circuit arrangement for generating a sawtooth current through a line deflection coil
Television display apparatus including a circuit arrangement for combined line deflection and supply voltage stabilisation with the aid of means for field frequency modulation of the line...
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3904918 |
Dynamic convergence correction device
A dynamic convergence correction device is disclosed which comprises a first saw-tooth voltage generator for horizontal cycles, a second saw-tooth voltage generator for vertical cycles, first and...
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3902100 |
Dynamic convergence circuit
A circuit for supplying a current to a dynamic convergence coil on a color cathode ray tube for dynamically correcting misconvergence of electron beams in the tube, which comprises current...
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3895258 |
Deflection linearity correction circuit
Distortion in the deflection driver circuit of an electron beam scanning device is corrected by adding a controlled pulse to the shaping capacitor across the deflection coil during the retrace...
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3894268 |
Television deflection circuit having horizontal pincushion correction
A deflection circuit for a television receiver having a vertical final stage powered by a horizontal final stage. A supply circuit containing rectifiers and filters is disposed between the...
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3879636 |
Circuit arrangement for correcting horizontal pin cushion distortion
A circuit arrangement for the correction of horizontal pin cushion distortion in a television receiver includes a main sweep generator having a final stage which feeds the primary winding of a line...
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3879635 |
IMPROVED CONVERGENCE AND TRIAD DISTORTION CORRECTION MEANS FOR WIDE ANGLE CATHODE RAY TUBE
Improved dynamic convergence means and triad distortion correction means which may advantageously be formed upon the core of a deflection yoke of a color television cathode ray tube. The dynamic...
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3852640 |
CATHODE RAY TUBE CIRCUIT
A cathode ray tube circuit arrangement having digitally operated control circuits for controlling beam deflection signals, a decoder which identifies predetermined beam positions and a function...
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3849697 |
METHOD AND APPARATUS FOR STATIC AND DYNAMIC CONVERGENCE
The three electron beams in a color television cathode ray tube are statically converged at the beginning and end of vertical and horizontal scan lines, and are dynamically converged in the center...
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3825796 |
CRT GEOMETRY CORRECTION NETWORK
Geometry distortion, caused by the radius of curvature of the face of a CRT being larger than the axial distance of the CRT beam source to the CRT face, is corrected by a network which is an...
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3825793 |
RASTER CORRECTION CIRCUIT UTILIZING A PARABOLICALLY VARYING LOAD CIRCUIT
A raster correction circuit for a color television receiver provides side pincushion correction by utilizing a parabolically varying load circuit coupled in parallel relation with the horizontal...
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3823338 |
CATHODE-RAY TUBE NON-LINEARITY CORRECTION CIRCUIT
A non-linearity, or barrel-effect, distortion of a cathode-ray tube display is corrected by deriving a first input signal for a multiplier circuit from a horizontal ramp signal by a full-wave...
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3823340 |
CIRCUIT FOR GENERATING A SAWTOOTH-SHAPED CURRENT THROUGH A COIL BY COMPENSATING FOR DEFLECTION COIL RESISTANCE
A deflection circuit in which a switching element, for example, a thyristor is driven during the flyback period. During the scan a diode automatically becomes conducting so that a constant direct...
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3814981 |
HORIZONTAL CENTERING CIRCUIT
A horizontal centering circuit having a variable differential coil with its center tap coupled to the junction between a horizontal deflection winding and an S-shaping capacitor and its outer ends...
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3814982 |
SIDE PINCUSHION DISTORTION CORRECTION CIRCUITRY
A side pincushion distortion correction circuit which is supplied with drive current having a parabolic wave form synchronizing with a vertical deflection current signal comprises a saturable...
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3803444 |
TELEVISION DISPLAY APPARATUS EMPLOYING CONVERGENCE CORRECTION
Colour television display apparatus using substantially non-anisotropic astigmatic deflection coils resulting in the convergence along the axes and in the corners of the display screen being...
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3796911 |
WAVEFORM CORRECTION FOR RESONANT RECOVERY DEFLECTION SYSTEMS
The electrical current waveform of a resonant recovery deflection amplifier is corrected to meet requirements of linearity in cathode ray tube displays. A correction amplifier receives as one input...
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3781590 |
PINCUSHION DISTORTION CORRECTION CIRCUIT
A saturable reactor in series with a horizontal deflection coil introduces a parabolic reactance variation which corrects for side pincushion distortion in a television cathode ray tube. A bridge...
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3781470 |
PHASE CONTROL SYSTEM FOR SIGNAL CONDITIONING CIRCUITS
A phase modulator produces a controlled variable phase shift in the input signal being supplied to a signal conditioning circuit so as to maintain the total phase shift between the original input...
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3760222 |
PINCUSHION CORRECTED VERTICAL DEFLECTION CIRCUIT
Transistorized vertical deflection circuit employs output stage of class B, push-pull, complementary symmetry configuration with vertical yoke winding halves serially connected in output circuit....
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3740611 |
VERTICAL DEFLECTION WAVEFORM GENERATOR
A waveform generator for supplying driving current to the vertical deflection coils of a television receiver includes a source of linear sawtooth signals which are applied in phase opposition to a...
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3725726 |
CRT GEOMETRY CORRECTION WITH ZERO OFFSET
A sawtooth driving voltage for deflecting the beam in a cathode ray tube has centering and geometry distortion correction provided by means of a feedback path including an integrator which adds a...
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3706907 |
DEFLECTION CIRCUIT WITH MEANS FOR GENERATING CORRECTION WAVEFORM
A circuit for developing, in a deflection system for a cathode ray tube in which the electron gun is disposed at an angle other than normal to the cathode ray tube screen, a correction waveform to...
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3706905 |
DEFLECTION COMPENSATION SYSTEM
A system for correcting distortion in the deflection of the beam in a cathode ray tube used to display lines of alphanumeric characters as in a computer terminal unit. Characters are generated one...
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3700958 |
DEFLECTION AND PINCUSHION CORRECTION CIRCUIT
Combined vertical deflection and top and bottom pincushion correction signals are applied to a single amplifier circuit which provides the required vertical deflection n output current as well as...
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3697801 |
CIRCUIT ARRANGEMENT FOR PRODUCING A LINE-FREQUENCY SAWTOOTH-CURRENT HAVING A FIELD-FREQUENCY-VARYING AMPLITUDE IN A TELEVISION DISPLAY DEVICE
A TV deflection circuit for producing a line frequency sawtooth current whose amplitude varies at the field frequency said variation being approximately parabolic to provide East - West raster...
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3676733 |
CIRCUIT ARRANGEMENT FOR GENERATING A LINE FREQUENCY PARABOLICALLY MODULATED SAWTOOTH CURRENT OF FIELD FREQUENCY THROUGH A FIELD DEFLECTION COIL
A TV deflection system that includes a circuit for generating a sawtooth field current parabolically modulated at the line frequency in the field deflection coil. The circuit includes a resonant...
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3649870 |
PINCUSHION CORRECTION CIRCUIT UTILIZING A DC-REGULATED POWER SUPPLY
A circuit for correcting side pincushion distortion in a color television receiver having a cathode-ray tube and associated horizontal and vertical deflection circuits for generating a raster...
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3648099 |
CIRCUIT ARRANGEMENT IN A DISPLAY DEVICE FOR PRODUCING A LINE-FREQUENCY SAWTOOTH CURRENT HAVING AN AMPLITUDE WHICH VARIES AT THE FRAME FREQUENCY
A color TV display system with a circuit for generating in the line deflection coil halves a line-frequency sawtooth correction current whose amplitude varies at the frame frequency. The line...
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3566181 |
PIN-CUSHION CORRECTION CIRCUIT
Apparatus for effecting asymmetrical top and bottom pin cushion correction in a television receiver includes a core of saturable magnetic material upon which a signal winding and a control winding...
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3543080 |
CRT PINCUSHION DISTORTION CORRECTION APPARATUS
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3519877 |
PINCUSHION EFFECT CORRECTING ARRANGEMENT
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3517252 |
LINEARITY CORRECTION APPARATUS FOR MAGNETICALLY DEFLECTED CATHODE RAY TUBES
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3502939 |
DISTORTION CORRECTING DEVICES FOR MAGNETIC DEFLECTING DEVICES
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3487164 |
DISPLAY APPARATUS DEFLECTION SIGNAL CORRECTION SYSTEM WITH SIGNAL MULTIPLICATION
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3484648 |
HORIZONTAL AND VERTICAL DEFLECTION OUTPUT CIRCUIT ARRANGEMENT FOR CATHODE RAY TUBE
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3479554 |
RASTER DISTORTION CORRECTION CIRCUIT
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3463961 |
RASTER CORRECTION CIRCUIT ARRANGEMENT
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3452243 |
PINCUSHION CORRECTION CIRCUITS
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3444423 |
PINCUSHION CORRECTION CIRCUIT
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3444426 |
HORIZONTAL SWEEP SYSTEM WITH AUTOMATIC RASTER SIZE REGULATION
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3435278 |
PINCUSHION CORRECTED DEFLECTION SYSTEM FOR FLAT FACED CATHODE RAY TUBE
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3427497 |
MEANS FOR CONTROLLING DISTORTION IN A CATHODE RAY TUBE
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3422306 |
DISTORTION CORRECTION CIRCUITRY
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3408535 |
Raster correction circuit
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3401300 |
Pin cushion correction circuit
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