Abstract: The eluent used in IC separation contains non-volatile salt which is not compatible with electrospray ionization-mass spectrometry (ESI-MS). A suppressor is required to convert the non-volatile salt into water or the volatile acid form (i.e. acetic acid). When the suppressor fails, the non-volatile salts will enter the MS and cause extensive shutdown and maintenance of the mass spectrometer. The suppressor voltage derivative is used to evaluate the most common suppressor failure modes, including disruption of regenerant flow and excessive backpressure on the suppressor due to clogging in the downstream, and to trigger the eluent pump to stop the eluent flow or to trigger the auxiliary valve to switch the flow to the mass spectrometer from eluent to water.

Abstract: The disclosure provides a single-stage isolated bidirectional converter and a control method thereof. The converter includes: a first full-bridge circuit unit, a half-bridge circuit unit, a second full-bridge circuit unit, a phase-shift inductor unit, a transformer and a filter capacitor. The transformer includes a first winding and a second winding, and the first winding is provided with a center tap. The center tap is connected to the first port, two ends thereof are connected to the midpoints of the two bridge arms of the first full-bridge circuit unit through the phase-shift inductor unit, and two ends of the second winding are connected to the midpoints of the two bridge arms of the second full-bridge circuit unit. Two ends of the first full-bridge circuit unit are connected to two ends of the half-bridge circuit unit; two ends of the half-bridge circuit unit are connected to two ends of the filter capacitor.

Abstract: Data isolators are described. The data isolators include a differential receiver having cross-coupled single-ended amplifiers. The single-ended amplifiers may be referenced to a time-varying reference potential. The cross-coupling of the single-ended amplifiers may provide high speed, low power consumption operation of the data isolator.

Abstract: Aspects of the subject disclosure may include, generating, by a waveform generator, an alternating waveform by selectively enabling one or more switches coupled to a storage device, and supplying, by the waveform generator, the alternating voltage waveform to a winding coupled to a magnetic core of an inductive power supply to modify an alternating magnetic flux in the magnetic core from current alone flowing through a transmission medium coupled to the inductive power supply. Other embodiments are disclosed.

Abstract: In a video imaging apparatus, a camera module includes the imaging unit and an imaging control unit that controls the imaging operation of the imaging unit according to imaging control values, and the imaging apparatus main body connected to the camera module via a connection cable capable of bidirectional communication includes an image signal processing unit that outputs frame images of a video in sequence from the imaging signals and generates the imaging control values for controlling imaging operation of the imaging unit from the imaging signals. The imaging unit can determine whether the imaging control values input from the image signal processing unit via the connection cable are abnormal imaging control values under influence of noise.

Abstract: The present technology relates to a circuit substrate, an image sensor, and an electronic apparatus that are capable of suppressing generation of noise in a conductor loop, which is caused due to a change in the conductor loop. A circuit substrate according to the present technology includes a circuit that is formed of a conductor and is capable of forming a conductor loop, at least a part of the dimensions of the conductor loop being variable; and a plurality of conductors that are each formed at a position where an induced electromotive force is generated in the conductor loop by a magnetic field and each have a structure that suppresses a change in the induced electromotive force generated by a change in dimensions of the conductor loop, the magnetic field being generated by the plurality of conductors. The present technology is applicable to, for example, an image sensor and an electronic apparatus.

Abstract: A positioning apparatus is provided for an electron beam of an electron tube, the apparatus including a first DC voltage circuit having a high potential difference and a second DC voltage circuit having a smaller potential difference, having in each case a first potential level and a second potential level, and a deflection module, which has two inputs and at least one deflection coil, wherein the at least one deflection coil is connected between the two inputs of the deflection module.

Abstract: A vehicular video processing device includes a clock output unit and an output unit. A video signal output from an external video device via a video signal receiving unit and having predetermined format and first bit width is inputted to the vehicular video processing device together with a first clock signal. The clock output unit outputs a second clock signal having a frequency acquired by multiplying first clock signal frequency by a predetermined multiplier factor. The output unit converts the video signal having the first bit width to a video signal having a second bit width smaller than the first bit width according to the multiplier factor, and outputs the converted video signal together with the second clock signal. With above-described device, image processing can be properly performed to a video signal having a format difficult to be directly input or output.

Abstract: An apparatus and method for magnetic control of an electron beam includes a control circuit having a first low voltage source and a second low voltage source. The control circuit also includes a first switching device coupled in series with the first low voltage source and configured to create a first current path with the first low voltage source when in a closed position and a second switching device coupled in series with the second low voltage source and configured to create a second current path with the second low voltage source when in a closed position. The control circuit further includes a capacitor coupled in parallel with an electron beam manipulation coil and positioned along the first and second current paths and a current source circuit electrically coupled to the electron beam manipulation coil and constructed to generate an offset current in the first and second current paths.

Abstract: We describe a device and an associated method that includes an EHT signal processing module to generate a compensated gain signal responsive to a first EHT signal. A field fly-back processing module generates a first correcting signal responsive to a first VFB signal. A horizontal scanning correction module generates a predistortion signal responsive to the compensated gain signal. A first digital to analog conversion module converts the predistortion signal into a corresponding analog predistortion signal. A field scanning correction module generates a correcting wave responsive to the compensated gain signal and the first correcting signal. A pulse width modulated module generates a modulated correcting wave by pulse width modulating the correcting wave. A power amplification module generates an amplified modulated correcting wave by amplifying the modulated correcting wave. And a cathode ray tube displays an image responsive to the analog predistortion signal and the amplified modulated correcting wave.

Abstract: A device and method for generation of a dynamic focus correction signal for use with a CRT that includes an analog scanning processor for generating a dynamic focus correction signal that is proportional to Kx2+(1?K)x4, where x is the distance from a mid point of a viewing surface of the CRT, and K is a real number in the range 0.00 to 1.00. Embodiments of the invention find particular use in CRTs having generally flatter, squarer configurations.

Abstract: The present disclosure describes a technique for reducing east-west geometry mismatch between the top and bottom of a raster display. This is accomplished by generating a horizontal correction signal that does not have any discontinuities. Since there are no discontinuities in the horizontal correction signal, the horizontal deflection current signal will not be distorted. As a result, there will be no east-west geometry mismatch between the top and bottom of the raster display.

Abstract: An electrostatic deflection circuit and method of an electronic beam measuring apparatus which can achieve the high precision of the electronic beam measuring and contribute to the simplification of the structure of the apparatus is provided. In an analog arithmetic circuit included in an analog operation part constituting an electrostatic deflection circuit, output voltages of multipliers are added and output by an adder. When the magnification is low, as the side of an ordinarily closed contact is closed driven by a relay driving circuit, the output of the adder is amplified by a high gain amplifier with a high amplification factor and applied to an electrostatic deflecting board. When the magnification is high, the side of an ordinarily open contact is closed and it is amplified by a low gain amplifier with a low amplification factor and applied to the electrostatic deflecting board in the same way.

Abstract: A line deflection circuit for a television receiver having a deflection coil, an S capacitor for S correction of the linearity of the deflection, the capacitor being connected in series with the deflection coil, and having means for changing over the linearity of the line deflection current for a change of the picture aspect ratio, wherein the means for changing the picture aspect ratio comprise a network formed by an inductance and a capacitance which are connected in series, wherein the network is tuned to approximately the line trace period, wherein a switch is provided to switch the network between an operative and a non-operative state, and wherein the network in its operative state is connected in parallel to the S capacitor.

Abstract: A method of correcting deflection distortion includes dividing a deflection area to which a charged-particle beam is deflected into equal initial blocks as an initial setting, calculating an initial aberration amount for each of the initial blocks generated when the charged-particle beam is deflected, dividing the deflection area into main blocks in accordance with a change rate of the initial aberration amount; calculating a main aberration amount for each of the main blocks generated when the charged-particle beam is deflected, and calculating a correction value correcting a deflection distortion based on the main aberration amount.

Abstract: A display apparatus having a high voltage FBT driving circuit includes a transformer having a primary and a secondary coil, a high voltage detector to detect an output voltage of the secondary coil, a high voltage compensator to output a high voltage compensating signal based on the detected voltage, a DC voltage controller to adjust a DC voltage according to the high voltage compensating signal and to output the adjusted DC voltage to the primary coil, a horizontal deflector to generate a horizontal deflecting pulse based on the DC voltage, a turns ratio adjuster to adjust a turns ratio of the primary and secondary coils, and a controller to control the turns ratio adjuster so as to make the output DC voltage higher than a lower limit when the frequency of a received horizontal synchronous signal is lower than a predetermined reference level.

Abstract: The present disclosure describes a technique for reducing east-west geometry mismatch between the top and bottom of a raster display. This is accomplished by generating a horizontal correction signal that does not have any discontinuities. Since there are no discontinuities in the horizontal correction signal, the horizontal deflection current signal will not be distorted. As a result, there will be no east-west geometry mismatch between the top and bottom of the raster display.

Abstract: A vertical deflection apparatus supplies a vertical deflection current to a vertical deflection coil to deflect an electron beam in the vertical direction of a screen. The apparatus includes: a vertical deflection current output circuit that outputs a vertical deflection current; a correction circuit that outputs a correction signal periodically changing in a parabolic shape in a horizontal scanning period to correct a north-south pincushion distortion; a modulation circuit that modulates the phase of the correction signal output from the correction circuit in a vertical scanning period; and a superimposition device that superimposes a correction current based on an output signal of the modulation circuit on the vertical deflection current.

Abstract: A resonant pulse voltage having a positive polarity is applied by a first resonant circuit and a third resonant circuit to a horizontal deflection coil included in the first resonant circuit, and a resonant pulse voltage having a negative polarity which is opposite to that of resonant pulse voltages applied by the first resonant circuit and the third resonant circuit is applied to only a horizontal deflection coil in the first resonant circuit without being applied to a transistor by a second resonant circuit.

Abstract: A switching-type vertical deflection output circuit comprises: an output-stage circuit constituted of first and second diodes and first and second switching elements, a smoothing circuit, a vertical deflection coil, a reference vertical sawtooth voltage generation unit, a voltage conversion unit of a vertical deflection current, an error voltage generation unit which obtains an error voltage between the reference vertical sawtooth voltage and the conversion voltage of the voltage conversion unit, a drive unit, and a pump-up circuit which pumps up a power-supply voltage to be supplied to the output-stage circuit during the flyback period. The vertical deflection waveform is stabilized by applying a pump-up pulse of the pump-up circuit to the feedback input terminal through an impedance circuit.

Abstract: A DPRAM is placed in the RF path before the digital to analog converter, to provide dynamic path gain compensation to the digital signal prior to conversion to an analog signal. The DPRAM stores corrections to the signal to compensate for amplitude losses in the signal arising from heat and non-linearities. The DPRAM has two sets of identical addresses. A logic switch, alternately directs an input signal to one of the two sets of addresses. Pre-calculated signal values which compensate for path gain are stored in one of the two sets of addresses in the DPRAM. The signal input to the DPRAM is directed to the other block. The value of the signal input to the DPRAM will determine the address to which the new value can be found. It is this new value which is actually input to the DAC and from which an analog signal is created.

Abstract: An apparatus displays a video signal (VID) by means of a scan (SCAN). The apparatus may be, for example, a television set. The apparatus comprises a device (SCAVEM) for modulating the scanning rate (Vscan) as a function of the derivative (DLUM) of a luminance signal (LUM) extracted from the video signal (VID). This enables the subjective display quality to be improved. The apparatus has the following characteristic feature in order to obtain an even better quality, notably when the apparatus is used for displaying video signals of different types. The derivative (DLUM) of the luminance signal, as a function of which the scanning rate (Vscan) is modulated, is obtained by means of a difterentiator circuit (DIFF) having a controllable frequency response (CFR).

Abstract: Synchronization of a horizontal deflection circuit with horizontal synchronizing signal pulses is obtained by the use of a voltage controlled oscillator (VCO) that is included in a phase-lock loop circuit (PLL). A phase-control loop circuit (PCL) includes a phase detector having a first input terminal that is responsive to an output signal of the VCO and a second input terminal that is responsive to retrace pulses of a horizontal deflection circuit output stage. A sum signal of the phase detector output signal of the PLL and a vertical rate parabola signal is formed upstream of the loop filter of the PLL. Correction of a differential pin distortion is accomplished by dynamically phase shifting the phase of an output signal of the VCO in a vertical rate parabola manner.

Abstract: An apparatus and method for removing horizontal moire of a cathode-ray tube (CRT) monitor system, wherein horizontal moire can be completely removed even when the moire that occurs in an upper portion of the monitor is different from the moire that occurs in a lower portion of the monitor. In one aspect of the invention, a method for removing horizontal moire in a cathode ray tube (CRT) monitor comprises generating moire correction data in synchronization with a vertical synchronous signal, the moire correction data comprising a sawtooth waveform, adjusting one of a direct current (DC) component, an alternating current (AC) component, and both the DC and AC component, of the moire correction data, outputting the adjusted moire correction data for every other horizontal scan line in synchronization with an odd-numbered or an even-numbered horizontal synchronous signal, and delaying a horizontal drive signal in response to the output adjusted moire correction data.

Abstract: Disclosed herein is a horizontal deflection coil for a deflection yoke. The horizontal deflection coil includes an inner pincushion improving section connected to a screen bent, and sub-sections connected to the inner pincushion improving section. The inner pincushion improving section is disposed in an angular range of 45 to 60 degrees. The sub-sections include a horizontal color registration improving section for preventing a horizontal component of a green color from being widened, and a vertical color registration improving section for preventing a vertical component of the green color from being widened.

Abstract: A parabolic modulation circuit multiples a horizontal parabolic signal and a vertical modulation signal together, to amplitude-modulate the horizontal parabolic signal using the vertical modulation signal, and modulates the phase of the horizontal parabolic signal on the basis of the vertical modulation signal, to output the modulated horizontal parabolic signal to a correction current output amplifier. When an NS pincushion distortion on a screen of a CRT is asymmetrical, a horizontal parabolic signal generation circuit is so set as to generate an asymmetrical horizontal parabolic signal. A gull-wing distortion can be corrected by adjusting the value of n in an n-th power waveform generator in the horizontal parabolic signal generation circuit.

Abstract: A deflecting yoke apparatus comprising first and second frame coils configured to correct a vertical horizontal misconvergence first and second main coils and first and second sub-coils which are wound around a core and configured to deflect in a vertical direction electron beams which have passed through a magnetic field generated by the first and second frame coils, a first deflecting current supply portion configured to pass a serriform deflecting current to the first and second main coils, and a second deflecting current supply portion configured to supply to the first and second sub-coils through a first and second diodes connected in parallel so as to have opposed directions a deflecting current which is supplied to the first and second main coils by the first deflecting current supply portion.

Abstract: A shadow mask is formed by lapping a main mask and an auxiliary mask on each other. The auxiliary mask includes a porous portion having electron beam passage holes, nonporous portions situated individually at the opposite ends of the porous portion, a pair of skirt portions extending individually from the nonporous portions and lapped on the skirt portion of the main mask, and second beads formed individually on the skirt portions and overlapping first beads of the main mask. The height or width of the first beads and the second beads in a superposed portion in which the main mask and the auxiliary mask are lapped on each other is differentiated from that of the beads in non-superposed portions outside the superposed portion.

Abstract: A prefocus lens section is formed by a screen electrode and an additional electrode. A main lens section is formed by a focus electrode, an anode electrode and an intermediate electrode that is disposed between the focus electrode and the anode electrode. Each of the focus electrode and the intermediate electrode has a cylindrical electrode on at least one of opposed faces thereof. The intermediate electrode and the anode electrode have cylindrical electrodes on opposed faces thereof. A voltage with a level higher than a focus voltage and lower than an anode voltage is applied to the additional electrode and the intermediate electrode.

Abstract: A method for generating display correction waveforms for a CRT display comprises the steps of selecting one of a plurality of trace portions for forming part of a correction waveform, the trace portions having different average values. Completing each of the correction waveform by combining each selected trace portion with a respective retrace portion such that all completed correction waveforms have a predetermined average value. The correction waveforms may have vertical and/or horizontal rates.

Abstract: The present disclosure describes a technique for reducing east-west geometry mismatch between the top and bottom of a raster display. This is accomplished by generating a horizontal correction signal that does not have any discontinuities. Since there are no discontinuities in the horizontal correction signal, the horizontal deflection current signal will not be distorted. As a result, there will be no east-west geometry mismatch between the top and bottom of the raster display.

Abstract: An apparatus for supplying a deflection power for use in a display and a control method thereof. The apparatus includes a high voltage outputting portion having a first coil connected to a rectifier and a second coil, coupled with the first coil, which outputs an induced voltage, a first switch installed between the rectifier and the first coil, for controlling a power supply, a second switch installed on a path formed from the first switch, the first coil, and the rectifier, for controlling the power supply, and a deflection electric current generator connected in parallel with the second switch, the deflection electric current generator having a series-connected deflection coil and capacitor.

Abstract: A line scan circuit for a CRT, including, in series across a switch, two oscillating circuits having the same time constant, each including, in parallel, a capacitor, a diode connected in antiparallel, and a series association of an inductor and of a voltage source, the inductor of a first one of the oscillating circuits being a scan coil of the CRT; an amplifier receiving a set-point voltage and using, as a feedback, a voltage taken from one of the oscillating circuits, and providing an adjustable voltage source to the second oscillating circuit.

Abstract: A distortion correcting circuit for correcting vertically asymmetric distortion while achieving reduction in circuit scale and a display apparatus equipped with the circuit are provided.

Abstract: A video signal is split into a first signal and a second signal. The first signal includes low amplitude/high frequency components of the video signal, which can be properly amplified by a video amplifier. The second signal includes high amplitude/high frequency components of the video signal, which cannot be properly amplified by the video amplifier. The first signal is combined with the video signal, amplified by the video amplifier, and used to modulate the intensity of an electron beam. The second signal is amplified by a scan velocity modulation amplifier and used to modulate the horizontal scan velocity of the electron beam.

Abstract: An image display is operable with video signals having a plurality of scanning frequencies and comprises a cathode ray tube for the display of ones of the video signals. A deflection coil is mounted on the cathode ray tube and a horizontal deflection amplifier is coupled to the deflection coil and generates a deflection current therein. A plurality of retrace capacitors are controllably coupled to the horizontal deflection amplifier in response to a selected scanning frequency to maintain a substantially constant active picture display area with the ones of the video signals having the plurality of scanning frequencies.

Abstract: An electromagnetic quadrupole circuit capable of always performing the optimal correction of the spot form is provided with: a current detecting section 20 for detecting the peak value and bottom value of current flowing along an electromagnetic quadrupole coil 8; a control section 50 for supplying a prescribed peak control value and a prescribed bottom control value; a first power source 16 for controlling the feedback of the amount of supply current based on the peak value detected by the current detecting section 20 and the peak control value supplied from the control section 50; and a second power source 17 for controlling the feedback of the amount of supply current based on the bottom value detected by the current detecting section 20 and the bottom control value supplied from the control section 50.

Abstract: A video imaging apparatus comprises first and second cathode-ray tubes, each having an ultor electrode and a focus electrode. A power supply generates an ultor voltage, which may have a fluctuating voltage component produced by beam current variations, and which is coupled to first and second ultor electrodes of the first and second cathode-ray tubes. A high voltage amplifier generates a dynamic focus voltage component at a frequency related to a deflection frequency. A combining network combines the fluctuating voltage component and the dynamic focus voltage component to develop a combined, dynamic focus voltage. The combined, dynamic focus voltage is coupled to each of the first and second focus electrodes for developing from the combined, dynamic focus voltage each of a first dynamic focus voltage at the first focus electrode and a second dynamic focus voltage at the second focus electrode.

Abstract: In a CRT display apparatus, a horizontal distortion correction apparatus is provided for correcting horizontal distortion of an image by applying a residual phase to control the phase of a horizontal deflection current. The horizontal distortion correction apparatus corrects horizontal distortion of an image caused by an assembly error of the CRT display apparatus for displaying an image by scanning a video signal, based on a horizontal synchronizing signal included in the video signal. The horizontal distortion correction apparatus includes a PLL supplying the horizontal deflection current to a video signal controller for displaying an image on the CRT. A distortion-correcting waveform generator is operated by the user, applying a wave signal having a desired waveform to the PLL to provide a residual phase for the horizontal deflection current to control the phase thereof. As a result, the image without horizontal distortion is displayed on the CRT display apparatus.

Abstract: A dynamic focus voltage generator includes a source of a flyback input signal at a horizontal deflection frequency. A double integrator is responsive to the input signal for generating a parabolic periodic signal. An amplitude detector is responsive to the parabolic periodic signal for generating a control signal that is indicative of an amplitude of the parabolic periodic signal. A comparator is responsive to a signal at a reference level and to the control signal and coupled to the double integrator for regulating an amplitude of the parabolic periodic signal in a gain control negative feedback manner. A non-linear network is responsive to the parabolic periodic signal for producing a bathtub shaped output signal that is coupled to a focus electrode of a cathode ray tube.

Abstract: Disclosed is a cathode ray tube and a intensity controlling method achieving a reduced amount of factors for correcting intensity prepared and capable of performing proper intensity control so that the joint portion of split picture planes is inconspicuous from a viewpoint of intensity. With respect to the direction of overlapping a plurality of split picture planes, only correction factors at representative signal levels are pre-stored as a basic factor table. Any of the factors at the other signal levels is obtained by performing an interpolating operation using the basic factors in the basic factor table. The value of the signal level of a video signal referred to when the correction factor in the overlapping direction is obtained is changed by using a shift factor associated with the pixel position in the direction orthogonal to the overlapping direction. The basic factor is thereby changed according to the pixel position in the orthogonal direction.

Abstract: An apparatus for the correction of East-West distortion of images produced on the screen of a picture tube. More particularly, it concerns an electronic circuit for dynamically controlling the AC component of the drive signal to an East-West amplifier (14) in a picture tube horizontal scanning system. The electronic circuit comprises an input (44,66) for receiving a signal related to the beam current of the tube, an output for connection to the input of the East-West amplifier, a capacitive element (32,64), and an active control device (30,60) for controlling the capacitive element in response to the signal at the circuit input.

Abstract: The invention comprises a cathode ray tube of the index type having tracking structures (15,17) that comprise finger elements (15A, 17A). A width wP of the finger element at the position P is dependent upon the position of P on the screen (10). This enables to compensate for a position dependent compromise between various parameters of the electron beams (7,8,9), thereby improving brightness and color purity of the tube. In a preferred embodiment the width wB near the border of the screen (10) is larger than the width wC near the center of the screen.

Abstract: The invention comprises a cathode ray tube having a line coil (15) for deflecting an electron beam (6,7,8) in a horizontal direction and a frame coil (13)′ for deflecting the electron beam in vertical direction. The line coil (15) comprises two line coil halves (17,19) that are operated with currents IN, IS, respectively, which are a function of the position of the deflected beam. This substantially reduces energy dissipation of the line coil (15). In an advantageous embodiment the tube further comprises a quadrupole coil (14) for correction of an asymmetry in the line magnetic field caused by the asymmetric driving of the line coil (15).

Abstract: An amplitude control circuit controls the amplitude of a correction signal periodically changing in a parabolic form at vertical scanning intervals based on the level of an amplitude control signal and applies an amplitude controlled output signal to an adder. The adder adds the amplitude controlled correction signal to the output signal of a low-pass filter and applies the resulting signal to a retrace scanning control circuit and a trace scanning control circuit. The retrace scanning control circuit and the trace scanning control circuit apply a gate pulse to horizontal output FETs.

Abstract: The present disclosure describes a technique that allows the amplitudes of vertical correction signal components to be adjusted independently. When the amplitude of each of the vertical correction signal components are set, they will not have to be readjusted when the amplitudes of the other vertical correction signal components are set. This greatly simplifies the process of setting the amplitudes of the vertical correction signal components, saving time and increasing the accuracy of the settings.

Abstract: A focusing circuit (1) for generating a focus control signal for a cathode ray tube (3) has a modulation input (4) for influencing the focus control signal, which focus control signal contains a measure for an envelope of excursions of horizontal scan lines across the cathode ray tube. The focusing circuit (1) comprises a load control circuit (5) for influencing the focus control signal, and having a control input (6) coupled to the modulation input (4) for influencing the focus control signal by load control variation in dependence on a desired focus control signal modulation. The load control circuit (5) may comprise a current source and/or a voltage source and/or controllable impedance that have a control input for coupling to a modulation output of a synchronization processor (7).

Abstract: A CRT display apparatus including a CRT having an electron gun is disclosed. The electron gun includes a cathode, and a G1 electrode, a G2 electrode and a G3 electrode disposed in that order for drawing electrons from the cathode. The electron gun further includes a modulating electrode disposed between the G2 electrode and the G3 electrode. The CRT display apparatus is provided with a controller for controlling a value of a voltage applied to the modulating electrode in order to suppress or interrupt an electron beam flowing from the cathode to a screen of the CRT.

Abstract: There is disclosed a vertical deflection circuit for use in a display device employing a CRT. The vertical deflection circuit has a DSP (digital signal processor) for producing a digital current signal during each main period. This digital current signal shows plural current values which increases in first equal increments from a different value during each main period. The digital current value is converted into an analog current signal by a D/A converter and then averaged by a low-pass filter. A vertical deflection current is produced based on the averaged analog current signal. Because plural different current values are averaged, the average value varies linearly. Accordingly, the vertical deflection current varies linearly with each main period.

Abstract: A method for controlling the power consumption in a tilt correcting coil is disclosed. The power consumption is corrected Controlling power consumption in the tilt correcting coil for correcting to correct the tilt of the images of on the cathode ray tube. If When a microcomputer judges that the mode is the on-state mode, then the microcomputer outputs a tilt correcting PWM signal in accordance with the user's inputting input. Then the The output tilt correcting PWM signal is converted into a dc voltage, and the level is adjusted. Then the signal is supplied to the tilt correcting coil, so that the tilt of the image on the screen would be is corrected. In the cases of the standby mode, the suspend mode and/or the or power-off mode, the microcomputer outputs a signal which has a function of minimizing the to minimize power consumption of by the tilt correcting coil. Therefore, the tilt Tilt of the image of the screen is corrected in the normal manner.