Abstract: A high-resolution display system is provided. A display system with high display quality is provided. The display system includes a processing unit and a display unit. A first image signal is supplied to the processing unit. The processing unit has a function of generating a second image signal by using the first image signal. The processing unit has a function of generating a correction signal. The display unit includes a pixel. The pixel includes a display element and a memory circuit. The second image signal and the correction signal are supplied to the pixel. The memory circuit has a function of retaining the correction signal.

Abstract: Provided is an image distortion detection method including: controlling an image output device to output a test image; shooting the test image by an image acquisition apparatus to obtain an imaged picture, the imaged picture being a picture shot when the image acquisition apparatus focuses on an imaging position of the image output device, and the image acquisition apparatus being arranged at a set viewpoint of the image output device; and determining whether image distortion meets a requirement based on widths of lines in the imaged picture. Embodiments of the present disclosure can be used for detecting depth-of-field distortion of the image output by the image output device.

Abstract: A voltage generator for converting a movable magnetic field into electrical voltage. The voltage generator includes an excitation unit, a conversion unit, and a power line unit. The excitation unit includes at least one magnet which is arranged on a body which is rotatably and/or moveably mounted. The at least one magnet generates a magnetic field. The conversion unit functionally cooperates with the excitation unit. The conversion unit includes a support body and a magnetization wire which is magnetized by the magnetic field. The magnetization wire includes, over its cross-section, a magnetically hard part and a magnetically soft part. The magnetization wire is wound around the support body to provide an axial tension. The power line unit functionally cooperates with the conversion unit. The power line unit includes an electric coil which is arranged around the conversion unit. The electric coil includes an electrifiable current conductor wire.

Abstract: The invention provides a digital driving method for OLED display device, by using a 3T1C pixel driving circuit comprising a first TFT, a second TFT, a third TFT, a capacitor, and an OLED to drive each sub-pixel, and by dividing a frame of OLED display device into a plurality of unequal-length sub-frames and equal-length sub-frames, and by changing the time gap between the first TFT charging and the third TFT discharging to control the illuminating time of each equal-length sub-frame. By combining the unequal-length and equal-length sub-frames, compared to the unequal-length sub-frame driving only in prior arts, the method can effectively reduce required hardware specification, improve luminance of OLED display device, and ensure the display quality of the OLED display device.

Abstract: An organic light emitting display device includes a display panel including a pixel disposed in an intersection of a data line, a feedback line, and a scan line, a data driver sequentially providing reference signals to the pixel though the data line, a sensing unit sequentially generating sensing signals based on voltages applied to the feedback line in response to the reference signals, and a timing controller calculating a compensation coefficient based on the sensing signals and compensating input data based on the compensation coefficient.

Abstract: To provide a display device which can perform external correction in parallel with display operation. The display device includes a plurality of pixels arranged in a matrix and a plurality of reading circuits provided outside the pixels. Each of the pixels includes a light-emitting element and a transistor which supplies current to the light-emitting element. In the display device, in a blanking period of the display device, a row in which all the pixels are displayed in black is selected so that a reading signal is input thereto; data on current characteristics of the transistors included in the pixels in the selected row is read out, and at the same time, display is performed in pixels in rows other than the selected row; and a signal for black display is input in the selected row so that the pixels in the row are displayed in black.

Abstract: A waveform correction processor corrects the waveform of a first digital audio signal (a CD signal, for example) having a first sampling frequency. A bit depth and sampling frequency converter converts the first digital audio signal with the waveform corrected by the first waveform correction processor to a second digital audio signal (a high-resolution digital audio signal, for example) having a second sampling frequency, which is higher than the first sampling frequency. The waveform correction processor corrects the waveform of the second digital audio signal.

Abstract: A device for digitizing an analog signal, wherein a distortion signal outlet of a distortion signal generator is only coupled to an analog digital converter by passive components.

Abstract: A system and method for aligning stacked projectors is provided. A computing device is in communication with at least two projectors, configured to project images stacked onto each other, and at least one sensor configured to acquire respective images the projector images. Respective initial positions in a common space are determined of each of the projector images, from the sensor images, as well as a virtual projector image located at a common target position. Respective transforms for each of the projector images to one or more of shift and transform the projector images to the common target position of the virtual projector image. The respective transforms are applied to further first projector images to produce respective transformed projector images. The projectors are controlled to project the respective transformed projector images according to the common target position.

Abstract: A camera system captures an image in a source aspect ratio and applies a transformation to the input image to scale and warp the image to generate an output image having a target aspect ratio different than the source aspect ratio. The output image has the same field of view as the input image, maintains image resolution, and limits distortion to levels that do not substantially affect the viewing experience. In one embodiment, the output image is non-linearly warped relative to the input image such that a distortion in the output image relative to the input image is greater in a corner region of the output image than a center region of the output image.

Abstract: The time-averaged ion beam profile of an ion beam for implanting ions on a work piece may be smoothed to reduce noise, spikes, peaks, and the like and to improve dosage uniformity. Auxiliary magnetic field devices, such as electromagnets, may be located along an ion beam path and may be driven by periodic signals to generate a fluctuating magnetic field to smooth the ion beam profile (i.e., beam current density profile). The auxiliary magnetic field devices may be positioned outside the width and height of the ion beam, and may generate a non-uniform fluctuating magnetic field that may be strongest near the center of the ion beam where the highest concentration of ions may be positioned. The fluctuating magnetic field may cause the beam profile shape to change continuously, thereby averaging out noise over time.

Abstract: An RF cavity includes a chamber, a conductive wall that encloses the chamber and has an inner side and an outer side, a switch arrangement comprising a plurality of solid-state switches arranged along a circumference of the wall around the chamber, wherein the solid-state switches are connected to the conductive wall such that RF currents are induced in the conductive wall when the switch arrangement is activated, as a result of which RF power is coupled into the chamber of the RF cavity, and a shielding device located on the outer side of the conductive wall, along a circumference of the RF cavity, the shielding device configured to increase the impedance of a propagation path of RF currents along the outer side of the wall such that the RF currents coupled into the wall are suppressed on the outer side of the wall.

Abstract: The present invention relates to an electron beam generator with an adjustable beam width. Said electron beam generator comprises: a plasma generating chamber that generates and sustains plasma; an RF power-generating antenna disposed on the outer circumference of said plasma generating chamber; a primary grid mounted on the outlet of said plasma generating chamber; a secondary grid placed at a fixed distance away from said primary grid; a beam width controller comprising an inlet, an outlet and a hollow inside, wherein the inlet is located on the side of said secondary grid, and the electron particles introduced through said inlet form electron beams of a pre-set beam width and are discharged through said outlet; and an RF shield ring disposed to surround the outer circumference of the inlet of said beam width controller.

Abstract: A method for a computer system includes opening a model of an object, wherein the model comprises a plurality of geometric elements, determining a subset of geometric elements from the plurality of geometric elements of the model, modifying properties of one or more of the geometric elements in the subset of geometric elements to form a modified subset of geometric elements, and using the modified subset of geometric elements to represent the model of the object in the computer system.

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: A deflection yoke for a cathode ray tube improves assembly and productivity and enables effective control of magnetic field corrections during device processing. The deflection yoke includes a horizontal deflection coil located next to the outer circumference of a funnel to generate a horizontal magnetic field, and a vertical deflection coil installed at the outer circumference of the funnel to generate a vertical deflection magnetic field. The vertical deflection coil is insulated from the horizontal deflection coil. A ferrite core is located close to the vertical deflection coil to reduce the loss in the magnetic force generated from the horizontal and vertical deflection coils, and to enhance their magnetic efficiency. A correction unit is spaced apart from the horizontal deflection coil by a predetermined distance to correct a geometric distortion of the vertical and the horizontal deflection magnetic fields that is generated due to the vertical and horizontal deflection coils.

Abstract: A method for focusing a charged particle beam, the method includes: (a) altering a focal point of a charged particle beam according to a first focal pattern while scanning a first area of a sample and collecting a first set of detection signals; (b) altering a focal point of a charged particle bean according to a second focal pattern while scanning a second area that is ideally identical to the first area and collecting a second set of detection signals; and (c) processing the first and second set of detection signals to determine a focal characteristic; whereas the first focal pattern and the second focal pattern differ by the location of an optimal focal point.

Abstract: There are provided CRT display systems. A CRT display system includes an electron gun assembly, a single plane sheath beam bender, and a digital processor. The electron gun assembly is configured to emit electron beams. The single plane sheath beam bender is configured to apply a deflection force to the electron beams. The digital processor is configured to receive and process an incoming video signal stream to provide signals there from to be delivered to individual cathodes of the electron gun assembly. The provided signals have a distortion applied thereto to effect a predetermined converged image. The applied distortion at least relates to a blue-bow convergence error.

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 method and apparatus used to step and correct the position of raster lines in a sinusoidal or zig-zag deflection system. By combining the magnetic flux generated with a rotation “twister” coil and a vertical deflection coil, scan lines can be uniformly spaced and separated nearly to their ends. Accordingly, the magnetic flux generated with the twister coil is adjusted going in the left to right direction then reversed in polarity and readjusted while returning from right to left. It is this controlled twister flux that combines with the linear vertical deflection flux to straighten and then step each scan line to produce an aligned raster.

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 deflection device for a projection tube includes a main deflection device for generating a raster and an auxiliary deflection device for correcting a convergence. The auxiliary deflection device includes a toroidal auxiliary horizontal coil, a saddle-type auxiliary vertical coil, and a ferrite core. According to this configuration, the deflection efficiency is enhanced, and pincushion distortion in upper and lower portions can be corrected efficiently while a change in the shape of a beam spot is reduced.

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: An image forming method and a charged particle beam apparatus suitable for suppressing the inclination of charging when scanning a two-dimensional area with a charged particle beam. A third scanning line located between a first scanning line and a second scanning line is scanned. After the first, second and third scanning lines have been scanned, a plurality of scanning lines are scanned between the first and third scanning lines and between the second and third scanning lines.

Abstract: Device for correcting the line and/or frame fields of a deflector for cathode ray tube comprising: a current sensor for evaluating the value of a line current Il a series of comparators intended to compare the value of the line current Il with reference values a current sensor for evaluating the value of the frame current It an analogue/digital converter for converting the analogue value of the frame current a programmed correction memory which is addressed by the output signals from the comparators and from the analogue/digital converter so as to deliver to at least one digital/analogue converter, data which are dependent on the addressing signals a low-pass filter for filtering the output of the digital/analogue converter at least one correction coil for correcting the deflection fields of the deflector, and generating a correction field as a function of the output value from the low-pass filter.

Abstract: A graphics system comprises pixel calculation units and a sample buffer which stores a two-dimensional field of samples. Each pixel calculation unit selects positions in the two-dimensional field at which pixel values (e.g. red, green, blue) are computed. The pixel computation positions are selected to compensate for image distortions introduced by a display device and/or display surface. Non-uniformities in a viewer's perceived intensity distribution from a display surface (e.g. hot spots, overlap brightness) are corrected by appropriately scaling pixel values prior to transmission to display devices. Two or more sets of pixel calculation units driving two or more display devices adjust their respective pixel computation centers to align the edges of two or more displayed images. Physical barriers prevent light spillage at the interface between any two of the display images. Separate pixel computation positions may be used for distinct colors to compensate for color distortions.

Abstract: A method and circuit for generating independent top and bottom corner correction using a single fourth order function is described. The top and bottom corner correction signal may be included in an east-west corrected voltage to correct an asymmetry of a picture with respect to a horizontal axis and a vertical axis of the picture. Two switch signals based on a ramping voltage, which is used to sweep an electron beam, and two clock signals control a sample-and-hold circuit. The sample-and-hold circuit is arranged to sample a fourth order voltage during a top portion and a bottom portion of the ramping voltage and provide two independent correction voltages Vout—top and Vout—bottom. The correction voltages are then provided for top and bottom corner correction to the east-west corrected voltage.

Abstract: A digitally-controlled vertical S linearity correction with a constant amplitude without using an AGC. To preserve line spacing between horizontal lines toward a top and bottom of a screen a third order correction voltage Vcube is applied to a sweep voltage Vosc. A constant current decoder determines an amount of appropriate correction current, which is employed to generate a sweep voltage with modified amplitude due to S correction and one without the modified amplitude. The sweep voltage with constant amplitude is employed to generate Vcube. Vcube is then applied to the sweep voltage along with a compensated amplitude component of the sweep voltage, such that a reduction in the amplitude caused by the S correction is compensated in the output voltage Vout. The compensation of the output voltage amplitude prevents a size reduction of the displayed picture on the screen without employing an iterative auto-align process.

Abstract: A method and circuit for digitally controlled vertical C linearity correction with constant start and end points without using an AGC. A squared voltage and a negative squared voltage are added as a correction voltage to a sawtooth-shaped ramping voltage that is employed to sweep an electron beam across a display. Line spacing toward the edges of a screen are maintained equal as a result enabling a uniform presentation of a picture on a non-spherical display. A digitally controlled attenuator determines a correction coefficient for correction voltages. The correction voltage is also processed by a sample-and-hold circuit to obtain a peak squared voltage. The peak squared voltage is then compared to a DC reference voltage and an offset adjustment current determined, based on a result of the comparison. The correction voltage is then added to the ramping voltage, which is also shifted by the offset amount.

Abstract: A projection display uses a matrix of digital correction factors defining deflection correction factors between which linear interpolation is used for intermediate points on the display. A circuit for generating a correction signal to correct image distortion on a display screen, comprises a memory storing displacement values corresponding to spaced points on the screen in a grid of rows and columns. The displacement values of the grid generally define correction curves for correcting the image distortion without introducing significant banded regions on the display screen. An interpolator is coupled to the memory for interpolating intermediate values between adjacent ones of the stored displacement values, and a digital to analog converter is coupled to the interpolator for providing the correction signal.

Abstract: A color cathode-ray tube apparatus having: a glass bulb including a face panel, a funnel, and a neck; a deflection yoke attached to the funnel to surround thereof; and a color-selection electrode disposed inside the face panel. A pair of degaussing coils are wound around the upper and lower portions of the glass bulb, respectively. A loop coil, which is disposed around the glass bulb between the color-selection electrode and the deflection yoke, includes: a first portion including two extending portions of the loop coil positioned over and below the glass bulb respectively, each center of the extending portions being substantially in a plane perpendicular to a tube axial of the glass bulb; and a second portion including two bent portions that are formed by bending right and left sides of an original form of the loop coil toward the neck.

Abstract: A graphics system comprises pixel calculation units and a sample buffer which stores a two-dimensional field of samples. Each pixel calculation unit selects positions in the two-dimensional field at which pixel values (e.g. red, green, blue) are computed. The pixel computation positions are selected to compensate for image distortions introduced by a display device and/or display surface. Non-uniformities in a viewer's perceived intensity distribution from a display surface (e.g. hot spots, overlap brightness) are corrected by appropriately scaling pixel values prior to transmission to display devices. Two or more sets of pixel calculation units driving two or more display devices adjust their respective pixel computation centers to align the edges of two or more displayed images. Physical barriers prevent light spillage at the interface between any two of the display images. Separate pixel computation positions may be used for distinct colors to compensate for color distortions.

Abstract: A color picture tube device has a funnel glass, a pair of horizontal deflection coils, an insulating frame, and a pair of vertical deflection coils. The pair of horizontal deflection coils are opposed to each other in a vertical direction around the outer surface of the funnel glass, and each have a window at the center. The insulating frame covers the horizontal deflection coils, resembles in shape a part of the funnel glass where the horizontal deflection coils are provided, and has openings in areas corresponding to windows of the horizontal deflection coils. The pair of vertical deflection coils are opposed to each other in a horizontal direction around the outer surface of the insulating frame, without overlapping the openings. A pair of correction coils are provided so as to be each at least partially inserted in a different one of the openings.

Abstract: A cathode ray tube video display comprises a cathode ray tube (CRT) for displaying a video signal (Vin) coupled thereto. A cathode ray tube electron beam blanker (201) is coupled to the cathode ray tube (CRT) and is responsive to a blanking trigger signal (GK) for blanking an electron beam (e) within the cathode ray tube (CRT). A blanking controller (200) is coupled to the cathode ray tube electron beam blanker (201) and generates the blanking trigger signal (Gk) for controlling electron beam blanking, wherein the electron beam (e) is blanked for different durations in accordance with one of a hot and cold start condition.

Abstract: The present invention relates to a tracking picture tube of the type in which comb-shaped electrodes or optical detecting means (12, 13) are used for generating a signal related to the position of an electron beam with respect to the strips (5). The tube is characterized in that the deflection unit is arranged to deflect the beams (21r, 21g, 21b) onto selected strips (22r, 22g, 22b) having coincident sides which neighbour finger portions (14, 15) of the same electrode (12, 13), and the selected strips (22r, 22g, 22b), excited by the electron beams, are separated by at least one unexcited strip, respectively.

Abstract: Disclosed is a method for correcting inner pin distortion generated in the CRT product and deflection yoke thereof. According to the disclosed method and deflection yoke thereof, the additional circuit for suppressing inner pin distortion phenomenon on the screen is not required as the related art, reduction in manufacturing costs is possibly achieved. Also, as the circuit for suppressing pincushion is not used, power dissipation could be reduced, and instability in dispersion and characteristics of a pin in the middle portion due to increase of dispersion generation by a wiring of a coil could be resolved.

Abstract: A cathode ray tube is provided, and more particularly, a cost-effective cathode ray tube effective for minimizing deterioration of color purity and obtaining a sufficient margin for a beam strike neck (BSN) phenomenon by moving a ½ center (deflection center) closer to a panel without changing the curvature of a funnel or the thickness of a glass inside the funnel.

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: A cathode ray tube including a tube realized through a face panel, a funnel, and a neck; a color selection apparatus including a shadow mask having a an effective area with apertures and a mask frame supporting the shadow mask; an electron gun mounted in the neck and emitting electron beams; a deflection apparatus generating a magnetic field to deflect the electron beams; and a moire compensation circuit performing moire compensation, wherein the color selection apparatus satisfies the following condition, 0.76 ≥ Ke Ko ≥ 0.

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: Apparatus and method are provided for using a multi-element field emission cathode in a color cathode ray tube. The field emission cathode may have from four to ten field emission arrays linearly arranged. The arrays are preferably formed from carbon-based material. An electron gun assembly focuses electron beams from each array on to a phosphor stripe or dot on the screen of the cathode ray tube. Deflection apparatus moves the beam from each field emission array according to clock signals. Clock signals also turn on or turn off voltage to contacts controlling electron current from the array. Values of voltage applied, determined by a video signal, determine the intensity of electron current from each array, which controls the intensity of the light emitted by each color stripe or dot of phosphor on the phosphor screen.

Abstract: The invention relates to a cathode ray tube comprising means (5) for generating an electron beam (6,7,8), means (51) for deflecting the electron beam, and a coil (14′) for influencing a deflection of the electron beam (6,7,8). The coil (14′) comprises an electrically conductive coil holder (46) and coil windings (47,48) having an electrically conductive outer layer (44). The electrically conductive layer (44) of the coil wires (41) and the coil holder (46) cooperate with each other so as to form a conductive path A between successive coil windings (47,48). Due to the outer layer (44) of the wires and the conductive coil holder (46) an electrical path A between successive windings (47,48) is created that provides damping and by which ringing is suppressed.

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: The object of the present invention is to provide a field emission device that emits an electron beam bundle whose spot profile on a display screen has as little distortion as possible, and that maintains a stable electron emission property regardless of the length of a driving time, a CRT apparatus equipped with such field emission device, and a production method of such CRT apparatus. The field emission device (10) has, on a surface of a substrate (11), a plurality of cathode electrodes (12) parallel to each other, an insulation layer (13), and a plurality of extraction electrodes (14) parallel to each other, in the stated order, the cathode electrodes (12) and the extraction electrodes (14) being orthogonal to each other and so yielding a plurality of crossover regions. At the crossover regions, electron emission zones (15) each made up of four emitters (16) are formed.

Abstract: Methods and apparatus implementing a technique for assembling a device, such as a digital convergence monitor, at more than one site where data is supplied from a first site to a second site and then the data is used in assembly of the device at the second site. In one implementation, a method for assembling a device at more than one manufacturing site includes: at least partially assembling a device at a first manufacturing site; adjusting the device at the first manufacturing site, where the adjustment is recorded in data; sending the data from the first manufacturing site to a second manufacturing site; assembling the device at the second manufacturing site; storing the data in the device; and adjusting the device at the second manufacturing site, where the adjustment at the second manufacturing site is recorded in the data.

Abstract: A deflection yoke device includes a deflection yoke for deflecting electron beams in horizontal and vertical directions, the electron beams being emitted from an electron gun of a color cathode ray tube; coma correcting coils positioned on an electron gun side of the deflection yoke so as to be opposed to each other in such a manner that the electron beams pass therebetween; and a pair of cores around which the coma correcting coils are wound, wherein a sliding mechanism is further provided for allowing each of the coma correcting coils to be slidable with respect to the corresponding core. Therefore, a misconvergence can be corrected by a simplified configuration without reducing a sensitivity of the coma correcting coils.

Abstract: A cathode ray tube (CRT) separation apparatus has a high-frequency power source coupled to the primary side of a transformer. The secondary side of the transformer is coupled to a separation cable that is wrapped around the CRT at the desired separation position by a movable guide and held there under tension by a tension guide. The separation is effected by thermal strain from joule heat generated by high-frequency current in the separation cable. The movable guide can wrap the separation cable around any type of CRT, enabling all types of CRTs to be separated by the same apparatus. A stranded stainless-steel separation cable, not susceptible to thermal embrittlement, can be used to avoid the need for frequent cable replacement.

Abstract: A method and apparatus used to step and correct the position of raster lines in a sinusoidal or zig-zag deflection system. By combining the magnetic flux generated with a rotation “twister” coil and a vertical deflection coil, scan lines can be uniformly spaced and separated nearly to their ends. Accordingly, the magnetic flux generated with the twister coil is adjusted going in the left to right direction then reversed in polarity and readjusted while returning from right to left. It is this controlled twister flux that combines with the linear vertical deflection flux to straighten and then step each scan line to produce an aligned raster.