Abstract: A method and device are described for detecting whether a flash (F) has occurred in the high voltage part of a combined high voltage and horizontal deflection circuit (100) in an apparatus comprising a cathode ray tube (CRT), such as for instance a television set, a monitor, etc. The possible flash is detected by checking the fly-back pulse (70) of the horizontal deflection circuit (16) for deviations that reflect the occurrence of a flash. One possible distortion indicative for the occurrence of a flash is bouncing of the fly-back pulse. Another possible distortion indicative for the occurrence of a flash is collapse of the fly-back pulse. Another possible deviation indicative for the occurrence of a flash is a substantial decrease of the storage time (&tgr;S) of the line deflection transistor (30).

Abstract: A deflection yoke arranged on an outer part of a funnel of a cathode ray tube includes a holder for housing a ferrite member as a magnetic field correction part for varying a main magnetic field, and the ferrite member is fixed and held by inner walls as resilient members in a housing portion of the holder, thereby holding the ferrite member at the desired position with a simple construction and realizing a cathode ray tube apparatus with reduction of cost and secure convergence correction.

Abstract: Picture display device comprising a cathode ray tube of the index type having a pattern of electrodes (16, 17), comprising a central part and a peripheral part. During operation an index signal is produced. The device has means (34) for extracting lower frequency data of the peripheral part and higher frequency data of the central part of the pattern from the index signal.

Abstract: A second grid is supplied with a low potential acceleration voltage. A fourth grid and a sixth grid are supplied with a first focus voltage. A third grid and a seventh grid are supplied with a dynamic focus voltage (Vf2+Vd). A prefocus lens having a horizontal and vertical focusing function is formed between the second grid and the third grid. An asymmetrical lens section having a horizontal diverging function and a vertical focusing function is formed between the third grid and the fourth grid. The prefocus lens and the asymmetrical lens section are electrostatically coupled.

Abstract: A deflection apparatus capable of generating a stable deflection pulse in a deflection output circuit even when turning on the power source or changing over the frequency of horizontal synchronizing signal is disclosed. A pulse width modulation (PWM) controlled power supply circuit generates a supply voltage for obtaining a desired horizontal amplitude depending on the frequency of horizontal synchronizing signal. The PWM voltage controller discriminates the frequency of horizontal synchronizing signal, and controls the output voltage of the PWM controlled power supply circuit. An oscillation frequency switching controller discriminates the frequency of horizontal synchronizing signal, and outputs a frequency changeover signal to an oscillator so as to be an optimum oscillation frequency depending on the output voltage of the PWM controlled power supply circuit.

Abstract: In an arrangement for coupling out an output current from a load current by a load (2), particularly a deflection coil of a cathode ray tube by means of an output resistor (4), which arrangement comprises an output current mirror (9, 10, 11), in which a control value in the form of the difference between two voltages dropping across two resistors (35, 36) for controlling the load current is generated and in which a reference current bank (12) is provided with a current mirror circuit whose input receives a constant current for generating constant currents, a minimal temperature dependence is obtained in that the output current is coupled to the emitter of at least a first output transistor (10) and at least a second output transistor (11) of the output current mirror, in that the reference current bank (12) supplies a first reference current which, together with the output current, is coupled to the emitter of the first output transistor (10) and the second output transistor (11) of the output current mirror,

Abstract: A horizontal drive circuit for a video display device includes a switching device for switching according to a horizontal oscillation frequency generated by a horizontal oscillator and a surge protector, and a method therefor. A driving transformer has a primary winding connected to the switching means and a secondary winding. The secondary winding provides an amplified current according to the status of the switching device. A diode serves as the surge protection connected between the switching device and the primary winding of the driving transformer.

Abstract: A circuit arrangement for signal coupling between circuit parts having supply lines isolated from one another wherein a) the circuit arrangement comprises a first circuit part (1) and at least one further circuit part (2), the first circuit part (1) being connected to a first supply line (3) having a first ground potential (GND1), and the other circuit part(s) (2) being connected to a supply line (4) which is different than the first supply line (3) and has an associated second ground potential (GND2), the supply line (4) or the associated line for the ground potential (GND2) being able to be connected and disconnected at least in one of these further circuit parts (2), b) there are one or more signal paths (6, 7, 8, 9) between the first circuit part and the other circuit part(s), each of these signal paths (6, 7, 8, 9) containing a coupling capacitor (11, 12, 13, 14) for capacitively transmitting useful signals (N1, N2, N3, N4) between the first circuit part and the other circuit part(s), c) each circuit

Abstract: Openings 2C01 and 2C03, which are formed by dividing pins 531 and 5033, are formed on a side section 2C of a horizontal deflection coil 2 within a range of 20 to 35% of a length of the horizontal deflection coil 2 from a larger diameter flange 2B and within an angle of 10 to 25 degrees to an X-axis. Other openings 2C02 and 2C04, which are formed by dividing pins 5032 and 5034, are formed on the side section 2C of the horizontal deflection coil 2 within a range of 55 to 70% of a length of the horizontal deflection coil 2 from the larger diameter flange 2B and within an angle of 25 to 40 degrees to the X-axis.

Abstract: An image distortion correction circuit is provided in which a horizontal deflection current (IH) flows through horizontal correction coils (L1, L2) and a vertical deflection current (IV) flows through either of vertical correction coils (L3, L4). The vertical correction coils (L3, L4) and the horizontal correction coils (L1, L2) are wound on the same core (4). A pair of magnets (2, 3) on opposite ends of the core (4) apply a biased magnetic field from the north pole toward the south pole. The anode of a diode (D1), the cathode of a diode (D2) and a first end of a resistor (R1) are connected to an intermediate terminal (P11) through which the vertical deflection current (IV) flows. A first end of the vertical correction coil (L3) is connected to the cathode of the diode (D1). A second end of the resistor (R1) and a terminal (P4) are connected to a second end of the vertical correction coil (L3).

Abstract: A deflection current/high voltage integration type power supply has a flyback transformer having a primary winding and a secondary winding; a series circuit of a deflection coil and a first capacitor, connected in series to the primary winding of the flyback transformer; a resonance capacitor connected in parallel to the series circuit of the deflection coil and the first capacitor; a first switching element, connected in parallel with the series circuit of the deflection coil and the first capacitor, to be turned on/turned off by a drive signal so that a high voltage is generated at the secondary winding of the flyback transformer and a deflection current flows in the deflection coil; a parallel connection circuit of a second switching element and a second capacitor, connected in series to the primary winding of the flyback transformer; and a switching control means to control the deflection current flowing in the deflection coil and the high voltage generated at the secondary winding of the flyback transfor

Abstract: An inline type color cathode-ray tube deflection yoke applies a deflecting magnetic field to electron beams from a neck portion of a valve accommodating three electron guns toward the funnel portion of the valve. The deflection yoke is provided with a vertical deflection coil, auxiliary coils serially connected to the vertical deflection coil, and a U-shaped magnetic member around each of both leg portions of which the auxiliary coils are wound. The U-shaped magnetic member is arranged so that the leg portions face the neck portion.

Abstract: In a field effect transistor (FET) discharging circuit for a horizontal deflection circuit, a backward voltage is removed by employing a diode to discharge a high level voltage formed on the FET.

Abstract: A horizontal deflection circuit capable of performing various corrections.

Abstract: This invention is directed to a circuit for permitting stable operation of horizontal deflection output, and comprises: a first parallel circuit P1 composed of a first switching element 11, a first damper diode 12 and a first resonance capacitor 13; a second parallel circuit P2 composed of a second switching element 21, a second damper diode 22 and a second resonance capacitor 23; a horizontal deflection yoke 2 connected to the second parallel circuit P2; a flyback transformer 1; an integration circuit 16 operative to synthesize pulses from the first and second parallel circuits P1, P2 to generate deflection current and to integrate inputted horizontal deflection drive signal; first and second comparison•latch circuits 17, 27 for respectively comparing signal from the integration circuit 16 with first and second levels to latch comparison results; first and second drive circuits 19, 29 for respectively driving the first and second switching elements 11, 21; and a control element for controlling the secon

Abstract: A waveform correction system using inductance-controllable inductors suitable for use in the horizontal sweep circuits of televisions and computer displays includes a linearity correction coil (18) that is connected in parallel to the horizontal linearity coil (12) of the sweep circuit and used to selectively alter the inductance of the horizontal linearity coil (12) to correct for non-linearities in the horizontal sweep waveform. The linearity correction coil (18) has an input coil (20) cross-coupled to an output coil (22) through a core (24) with the output coil (22) connected in parallel with the horizontal linearity coil (12). The input coil (20) is connected between a control node (26) and circuit ground.

Abstract: A circuit fixedly limits the horizontal image size of a screen of a CRT display. The circuit for limiting the horizontal image size of the screen detects a voltage indicative of the horizontal image size of the screen with power provided to a horizontal output unit by a field effect transistor in a horizontal output power supply unit. A current mirror circuit coupled to the field effect transistors outputs current which flows into the drain of a field effect transistor when the field effect transistor is turned on. The outputted current is transformed into voltage and the voltage is fed back to the PWM control circuit to limit the horizontal image size of the screen.

Abstract: A horizontal deflection circuit (61) includes a horizontal oscillator circuit (51) having a horizontal oscillation IC (1). A terminal (T12) of the horizontal oscillation IC (1) is connected to respective first ends of capacitors (8a, 8b). The capacitor (8a) has a second end grounded. The capacitor (8b) has a second end connected to a collector terminal of a transistor (9). The transistor (9) has an emitter terminal grounded through a resistor (11), and a base terminal grounded through a capacitor (13) and connected to a terminal (T121) of a microprocessor (12) through a resistor (14). The horizontal oscillation IC (1) receives a voltage (VT71) at a terminal (T13) thereof and a feedback voltage (VT31) at a terminal (T15) thereof. The circuit (51) generates a signal (VT14) synchronized with a horizontal synchronizing signal (HD) applied to a terminal (T11) to output the signal (VT14).

Abstract: A compensating circuit is for compensating distortion of a picture which is displayed on a display unit having a yoke. The compensating circuit controls a yoke current to compensate a picture distortion. The compensating circuit comprises a first generating section for generating a digital deflecting compensation signal in accordance with deflecting compensation data representative of compensation value of the picture. A second generating section generating a variable voltage (+B voltage) in accordance with a PWM pulse signal to control the yoke current on the basis of the variable voltage. A peak holding circuit holds a peak voltage of a flyback pulse based on the variable voltage to produce a peak voltage signal representative of the peak voltage. An A/D converter circuit converts the peak voltage signal into a digital peak signal. A PWM section produces the above-mentioned PWN pulse signal in accordance with the digital deflecting compensation signal and the digital peak signal.

Abstract: A scan frequency detector is responsive to a horizontal synchronization signal to generate a data signal that is indicative of the horizontal scan frequency. A digital-to-analog (D/A) converter produces from the data signal an analog, output signal at a first level, when the horizontal frequency is within a first range of values, at a second level, when the horizontal frequency is within a second range of values and at a third level, when the horizontal frequency is within a third range of values. A first switch of a switched S-capacitor arrangement, is turned on, when the output signal is at the first level. The first switch and a second switch of the switched S-capacitor arrangement, are turned on, when the output signal is at the second level. Both the first and second switches are turned off, when the output signal is at the third level. The third and second levels are distinguished by a level detector that includes a zener diode.

Abstract: A horizontal deflection drive circuit using a plurality of FETs is provided, which includes a base drive current supply for receiving an oscillation pulse in a low level generated by an oscillation element, to perform switching operation, a P-channel FET for receiving the oscillation pulse in a low level generated by the oscillation element, and receiving current from the base drive current supply, to perform switching operation, an N-channel FET for receiving an oscillation pulse in a high level generated by the oscillation element, to perform switching operation, and a drive transformer for inducing current supplied from a deflection current supply according to the switching operations of the P-channel FET and N-channel FET, the P-channel FET being switched by the current supplied from the base drive current supply.

Abstract: A horizontal size regulation circuit of a horizontal deflection circuit of a display device maintains a constant horizontal size despite transformer manufacturing tolerances, by using a horizontal flyback output value fed back from a choke coil of a horizontal output circuit. A voltage supplied to a switching element providing current to a horizontal output transistor is sensed according to the duty cycle output from a horizontal size controller. A voltage detector incorporated into the horizontal deflection circuit controls the value fed back to the horizontal size controller according to the variation of the voltage supplied to the switching element.

Abstract: A series arrangement of a deflection coil (Lf) and a series resistor (Rs) is connected between an output of a first output amplifier (1) and an output of a second output amplifier (2) to be driven in a bridge configuration for generating a deflection current (If) through the deflection coil (Lf). Across the series resistor (Rs), a voltage is generated which corresponds to the deflection current (If). A differential amplifier (5) has a first input connected to a first end of the series resistor (Rs). A second input of the differential amplifier (5) is connected to a second end of the series resistor (Rs) via a conversion resistor (Rc). An input current (Ii) is generated through the conversion resistor (Rc). The polarity of the input current (Ii) is selected to obtain a voltage across the conversion resistor (Rc) which has an opposite polarity with respect to the voltage across the series resistor (Rs).

Abstract: A deflection circuit generates a deflection current (If) through a deflection coil (Lf). The deflection circuit includes a series resistor (Rs) arranged in series with the deflection coil (Lf) to supply a feedback voltage (Vf;Vr), and a drive circuit (1,5) which has an output coupled to the series arrangement of the deflection coil (Lf) and the series resistor (Rs). The drive circuit (1,5) has an input coupled to the series resistor (Rs) to receive a feedback voltage (Vs). The drive circuit (1,5) further is coupled to a conversion resistor (Rc) for receiving an input waveform (Vi). The drive circuit (1,5) is arranged in a feedback loop to obtain a deflection current (If) with a shape resembling the input waveform (Vi). The deflection circuit further includes a damping impedance (Rd) arranged in parallel with the deflection coil (Lf), and a current generating circuit (3) for generating a correction current (Ic) within the flyback period (Tf).

Abstract: A horizontal deflection output circuit has a resonance circuit including a horizontal deflection yoke for generating the horizontal deflection signal, a first switch element, a second switch element comprising a bipolar transistor, and a circuit for applying a reverse bias voltage to the emitter-base junction of the bipolar transistor during a retrace period to remove excess minority carriers stored in its base rapidly, thereby making high speed switching operation of the transistor possible.

Abstract: A frequency detection circuit detects the frequency of a horizontal sync signal, and generates a mode switching signal corresponding to the detected frequency. A voltage-controlled oscillator constituting a PLL circuit has a plurality of oscillation modes obtained by dividing a frequency equal to an integer multiple of the frequency of the horizontal sync signal into a plurality of frequency ranges, and oscillates signals in the respective frequency ranges in accordance with control voltages output from a filter. The oscillation modes of the voltage-controlled oscillator are switched in accordance with the mode switching signal output from the frequency detection circuit. In the voltage-controlled oscillator, since the frequency range in each oscillation mode is narrow, the oscillation gain can be suppressed low, and a deterioration in jitter characteristics can be prevented.

Abstract: A multiscan compatible horizontal deflection driving circuit prevents the flow of an excessive current through a transistor in a horizontal deflecting circuit when the frequency of a horizontal synchronization signal is switched. In the horizontal deflection driving circuit according to the invention, when a frequency of an H sync pulse of an input composite video signal decreases, a driving power source voltage is reduced earlier than a reduction of a frequency of a horizontal driving pulse, thereby preventing an excessive collector current from flowing in the transistor in the horizontal deflecting circuit.

Abstract: A monochrome cathode ray tube (CRT) yoke includes harmonic windings for correcting spot distortion. In a first embodiment of the invention, the yoke includes harmonic windings in the entrance region of the yoke and harmonic windings in the exit region of the yoke. The harmonic windings in the entrance region produce a barrel-shaped field for correcting spot astigmatism along the diagonals of the CRT. The harmonic windings in the exit region of the yoke produce a pincushion-shaped field for correcting spot elongation along the diagonals of the CRT. In a second embodiment of the invention, the yoke includes harmonic windings only in the entrance region. A stigmator includes quadrupole coils driven at low power vertical scan rates. This allows the stigmator to be positioned near the electron gun and reduces the length of the CRT. In a third embodiment of the invention, the yoke includes harmonic windings only in the exit region.

Abstract: A color display device comprising a cathode ray tube and a deflection unit also includes a compensation coil or a compensation-coil system, for example, on the outside of the yoke of the deflection unit, so as to compensate for frame errors and convergence errors caused by the earth's magnetic field.

Abstract: A device for adjusting a horizontal raster size in a monitor is disclosed, wherein, by detection of beam current applied to a cathode ray tube of induced voltage across a flyback transformer. An error detector detects overvoltage or overcurrent and generates a pulse to a frame compensator. A variation in size of horizontal raster is regulated by controlling output signal of a horizontal output and deflection circuit, whereby a stabilized video frame in horizontal size is obtained.

Abstract: A cathode ray tube display with scanning beam velocity modulation comprises a cathode ray tube with a neck and gun for generating an electron beam. A deflection yoke is mounted on the cathode ray tube for electron beam deflection. A first flexible support having a side for conductor fabrication and a second flexible support having a side for conductor fabrication are superimposed and wrapped to conform to the neck circumference. A first coil pattern is formed as a conductor on the first conductor fabrication side and a second coil pattern is formed as a conductor on the second conductor fabrication side. A conductive connection couples between the first coil pattern and the second coil pattern. A connector couples scanning velocity modulation current to energize said first coil pattern and said second coil pattern for scanning beam velocity modulation.

Abstract: An intermediate tap 31 is provided on a vertical deflection coil 22 of a deflection yoke and the intermediate tap is connected to a chassis ground through a high-pass filter 32 which can pass only a ringing current to form a current path, thereby the the ringing current is prevented from passing through the vertical deflection coil 22 so that the raster ringing is substantially reduced.

Abstract: It is the object to create a vertical deflection circuit which is suitable, in particular, for a symmetric deflection with a sinusoidal deflection current and a free-running horizontal deflection circuit not synchronised by the input signal.A vertical pulse derived from the received signal and a horizontal pulse (H*) derived from the horizontal deflection circuit are applied to the synchronising inputs of the vertical deflection circuit in such a manner that the vertical deflection in each case begins with the first horizontal pulse following an edge of the vertical pulse (V) derived from the received signal and ends in a wait position preceding the next vertical pulse (V).Suitable, in particular, for television receivers with a symmetric free-running horizontal deflection not synchronised by the input signal.

Abstract: Deflection yoke of self-convergence system for deflecting electron beams of a color picture tube, has a pair of saddle type horizontal deflection coils and a pair of saddle type vertical deflection coils of first and second coils connected in series each other, a winding of each of the first and the second coils has a start, a finish and a tap provided between the start and the finish, the deflection yoke further has a diode block composed of diodes connected in parallel and reversed polarity each other. The deflection yoke features that the diode block is connected between the start and the tap of the respective first and second coils, or between the taps of the respective first and second coils, or between the start of the first coil and the start of the second coil, so that misconvergence of the electron beams is minimized.

Abstract: A nonlinear inductor for a CRT line timebase circuit comprises a bobbin carrying an inductive coil 41 and a first permanent magnet adjacent the coil. A second permanent magnet is positioned and oriented relative to the first magnet in such a manner that the magnetic field generated by the nonlinear inductor is substantially reduced. Because the second magnet is integral, the nonlinear inductor occupies the same printed circuit board area as a conventional nonlinear inductor. Furthermore, because the second magnet is oriented to substantially cancel the magnetic field, no additional magnets are required for deflecting the magnet field away from the CRT.

Abstract: A comparator detects a set-up voltage superimposed on a video signal. The detected set-up voltage is input to a timing information detection circuit to detect the display start timings and display end timings of a video signal or a single line and a single picture, respectively. Then, the detected timing information is input to an arithmetic operation means to determine the display period of the video signal for the single line and single picture and further determine the ratios thereof with respect to predetermined reference values. Further, the amounts of dislocation of the timing relationship between the display periods for the single line and single screen and a horizontal synchronizing signal and vertical synchronizing signal from predetermined reference relative relationships are determined, respectively.

Abstract: Accumulation of charge between neighboring image lines can be prevented in a television pick-up tube in which an image pick-up face is scanned along image lines by an electron beam when a comparatively small periodic deflection is imposed on the electron beam in a direction perpendicular to the image lines. To achieve this, a magnetic deflection element in the form of a saddle-shaped coil is disposed between the vertical deflection element of the television pick-up tube and the envelope of the electron gun.

Abstract: A television pick-up tube in an image pick-up system comprises an high-frequency magnetic deflection element which deflects the electron beam perpendicularly to the line direction in the television pick-up tube. As a result, residual charge remaining between the image lines on the target face of the television pick-up tube is neutralized. Inductive coupling of the high-frequency deflection element to the power supply increases the resonance frequency of the deflection element, so that the deflection element can operate at a frequency which exceeds the video signal frequency so that it does not interfere therewith.

Abstract: The object of the disclosure is a method and a coupling for decreasing the alternating current field produced by a cathode-ray tube in the environment. The said field or radiation is at least partly due to the capacitances (C1, C2) of the anode (A) with respect, on one hand, to the deflection coil (DY) and, on the other hand, to the ground. These capacitances produce, mainly because of the return pulse of the deflection coupling, a line rate noise voltage to the anode. According to the invention, a back-off voltage (U.sub.2) opposite to the noise voltage is fed to the anode (A) of the tube either directly or via a graphitizing (G). In cases where the same high-voltage transformer (TR) functions for both the high voltage of the anode and the horizontal deflection, the winding (L) of this transformer can also be used in generating the back-off voltage (U.sub.2). The back-off voltage can thus be coupled to the anode (A) via the high-voltage capacitor (C3) of the transformer.

Abstract: The length of the retrace portion of a vertical sawtooth signal is controlled by a microprocessor. In this way, the same type of an integrated circuit that includes the sawtooth generator can be used for generating the sawtooth signal required either for a switch or a non-switch vertical deflection circuit output stage.

Abstract: An electromagnetic deflection unit (7) coaxially surrounds a part of the envelope (1) of a cathode array tube. The deflection unit (7) comprises a coil support (8) and a deflection coil system (11, 11') which is located between the coil support (8) and the envelope (1). Each end portion (18, 18') of the coils (11, 11') is located exclusively on the side of the front flange (16, 16') of the associated coil (11, 11') facing away from the envelope (1). By virtue thereof, the deflection unit (7) can be tilted relative to the envelope (1) such that a sufficient degree of convergence of electron beams on the display screen of the cathode ray tube is obtained.

Abstract: In a cathode ray tube apparatus, a deflection yoke for generating an effective magnetic field to deflect electron beams in an envelope is provided around a funnel of the envelope. A pair of front magnetic coils are in substantially symmetrical with respect to a horizontal plane including a tube axis and a horizontal direction and are provided on a skirt of the envelope. A pair of rear magnetic coils are also arranged in substantially symmetrical with respect to the horizontal plane and are provided on the deflection yoke. Leakage magnetic fluxes generated from the deflection yoke are reduced by compensating magnetic fluxes generated from the front and rear magnetic coils.

Abstract: A deflection system comprises a variable gain amplifier for a luminance component of a video signal. A first differentiator differentiates the amplified luminance component. An output amplifier modulates beam scan velocity of an electron beam by energizing an auxiliary horizontal deflection yoke responsive to the differentiated luminance component. A second differentiator differentiates the differentiated luminance component. An integrator integrates the twice differentiated luminance component. The output of the integrator is a gain control signal. The variable gain amplifier has a gain which varies responsive to the gain control signal. The gain varies inversely with the frequency content of the luminance component. The second differentiator and integrator form a feedback loop.

Abstract: A television apparatus comprises a video display having a wide format display ratio, for example approximately 16:9. A deflection circuit generates first and second selectable rasters having a common horizontal scan width corresponding to the display but having first and second vertical heights respectively, for example nominal and overscanned vertical heights. A control circuit selects one of the first and second rasters for displaying pictures from wide format display ratio video sources and conventional format display ratio video sources respectively, for example 16:9 and 4:3. A picture from the wide format display ratio video source is substantially uncropped and a picture from the conventional format display ratio video source is expanded and cropped. One of the vertical formats provides substantially no image aspect ratio distortion of the pictures as displayed. The other one of the vertical formats provides substantially no cropping of the pictures as displayed.

Abstract: The constitutional body of the deflection yoke of the present invention comprises a vertical deflection coil which are constituted with two sets of coils two pairs of one for generating a pincushion magnetic field and one for generating a barrel magnetic field, and by connecting, to one set thereof, one set of diodes connected with each other, with the respective polarities of the diodes being opposite to each other, in parallel, the occurrence of inverse trilemma is substantially prevented.

Abstract: A deflection yoke for a single beam deflection comprises a pair of horizontal deflection coils, a pair of vertical deflection coils, a correction magnet, two sets of coil pairs connected in series with the horizontal deflection coils, a bias magnet and an auxiliary coil magnetically coupled to the coil pairs and supplied a vertical deflection current. A deflection device comprises the deflection yoke, a horizontal deflection circuit and a vertical deflection circuit. A monochrome CRT display comprises the deflection device, an video processing device and a monochrome CRT.

Abstract: A triggering system (1) comprises a trigger device (4) to which a trigger input signal is supplied from an input (2) via parallel signal paths (6, 7, 8). One signal path (6) may be a direct connection, while the other signal paths (7, 8) include frequency division devices (10, 13). The signal paths (6, 7, 8) are selectively switched between the input and the trigger device under the control of frequency-dependent switching devices (16, 21) depending on the frequency of a signal obtained from an input signal at the input (2) of the triggering system. As a result, the useful frequency range of the triggering system (1) is extended up to much higher frequencies than would be determined solely by the bandwidth of the trigger device.

Abstract: The saddle windings of the vertical deflection coils 31, 32 of a CRT are provided with external lines 11, 12 which establish distributed capacitances with the turns of the windings. Such lines present low impedance flow paths for unbalanced ringing currents induced in the vertical deflection coils by a high frequency horizontal deflection field, thus damping/dissipating the ringing currents and preventing their distortion of the displayed image.

Abstract: Active turn-off or disabling circuits respond to control signals from a control unit which defines the mode of operation of a receiver. In response to a designation of a standby mode of operation the active disabling unit actively disables a pulse width modulator to prevent pulses from being produced based upon an input of ringing signal. In addition, the active disabling circuits prevent such ringing signal from negatively effecting pincusion protection circuits. The ringing signal is produced in a horizontal flyback transformer during a transition interval that follows a transition to standby mode of operation.

Abstract: A deflection yoke device is a device for deflecting an electron beam traveling inside a CRT, and a deflection yoke device which is driven by a particularly high frequency has horizontal deflection coils each wound into a saddle-type configuration. In the invention, each horizontal deflection coil is provided with an intermediate terminal, and a damping circuit is provided between the intermediate terminals or between each intermediate terminal and a high voltage-side terminal or a low voltage-side terminal. The damping circuit eliminates electrical oscillations occurring in the horizontal deflection coil.