Abstract: A variety of systems, apparatus and methods for deflecting a particle beam are described. An apparatus comprises at least six electromagnetic portions disposed on a plane. Each of the at least six electromagnetic portions is aligned with a radius emanating from an axis normal to the plane and is distanced from the axis to form a volume about the axis. At least six coils are configured for affecting a dipole magnetic field in the volume in response to electrical currents applied to physically opposing coils where a particle beam entering the volume is deflected. Each of the at least six coils is disposed about a one of the at least six electromagnetic portions. A yoke structure is configured for returning a generated magnetic flux.

Abstract: A cathode ray tube in which a VM effect is maximized in a slim-type cathode ray tube having a short electric field in an anteroposterior direction. The cathode ray tube includes a panel having a fluorescent surface provided to raise colors, a shadow mask provided behind the fluorescent surface, a funnel connected to the rear portion of the panel to provide with an inner portion as an airtight space, an electron gun formed at the rear portion of the funnel for emitting an electron beam, a deflection yoke equipped outside of a neck portion of the funnel to deflect the electron beam, and a VM coil portion of which at least a portion inserted in an interval between the deflection yoke and the funnel to apply an electric field to the electron beam.

Abstract: A high-frequency, high-voltage electron switch includes an electron source, a steering mechanism, a mask or anode plate, and a target. The electron source produces a beam of electrons with a voltage of at least about 1 kV that impinges upon the anode plate. The steering mechanism scans the electron beam across the anode plate at a scanning frequency of at least about 10 MHz. A hole or aperture is provided in the anode plate that allows the electron beam to pass through and produce a pulsed, high-voltage current in the target with a very high-frequency repetition rate and a very fast rise time. The pulsed, high-voltage current produced in the target can be used to cause a high-voltage source to turn on and off.

Abstract: An electron gun comprises a shell having distal and proximal ends, a cathode structure disposed within the shell and having an electron emitting surface, an anode physically coupled to the shell at the distal end and spaced a fixed distance from the emitting surface, and a plurality of leads adapted to apply a voltage to the cathode structure with respect to the anode sufficient to cause emission of the electrons from the emitting surface. The anode has an aperture for passage therethrough of the beam of electrons emitted by the emitting surface. A first insulator is disposed within the shell proximal to the cathode structure. The first insulator has plural apertures having respective sizes in relation to corresponding ones of the plurality of leads such that the plurality of leads pass therethrough without contacting the first insulator. The first insulator provides stand-off for the voltage between the anode and cathode. A second insulator is disposed with the shell proximal from the first insulator.

Abstract: A cathode ray tube (CRT) having a glass envelope is disclosed. The glass envelope is formed of a rectangular faceplate panel and a tubular neck connected thereto by a funnel. An electron gun is positioned in the neck for directing electron beams toward the faceplate panel. A yoke is positioned in the neighborhood of the funnel-to-neck junction. The yoke has windings configured to apply a horizontal deflection yoke field and a vertical deflection yoke field to the beams. At least one magnetic field sensor is located near the glass envelope for sensing an ambient magnetic field environment of the CRT. A controller receives a signal from the magnetic field sensor. Register correction coils are mounted in the vicinity of the neck and are dynamically controlled by the controller to shift the beams.

Abstract: A Cathode Ray Tube (CRT) includes a panel having long and short axes and a tube axis perpendicular to the long and short axes, the panel including an inner phosphor screen. A funnel is attached to the panel, the funnel including a cone having a deflection unit arranged on an outer circumference thereof. A neck is attached to the funnel and has an electron gun arranged therein. The cone has a cross-section taken perpendicular to the tube axis with a shape varied from a circle to a non-circle having a maximum diameter in the directions except for the directions of the long and the short axes of the panel while proceeding from the neck to the panel, and with the cross-section of the cone on the tube axis by a point thereof, the inner and the outer surfaces of the cone in the directions of the long and the short axes are convex toward the tube axis.

Abstract: A cathode ray tube has a deflection yoke (14) secured to a glass envelope (2). The glass envelope includes a neck (4) and a funnel (5). The deflection yoke comprises an electrically insulative liner (15) provided with vertical (17) and horizontal deflection coils (19). The liner has rod receiving apertures (23) arranged proximate a rear end (20) of the liner. The rod receiving apertures extend through the liner at spaces between the vertical and horizontal deflection coils. Rods (29) are positioned in the rod receiving apertures. A clamp (30) has a locking portion (40) that engages the rods. The locking portion pushes the rods inward through the rod receiving apertures and into engagement with the neck to secure the deflection yoke to the neck of the envelope.

Abstract: Electromagnetic deflection unit for colour cathode-ray tubes, including a pair of frame deflection coils and a pair of line deflection coils, at least one of these two pairs of coils having the shape of a saddle, each saddle-shaped deflection coil having a rear bundle placed on the side facing the electron gun and a front bundle placed on the side facing the screen, two lateral harnesses of conductors connecting the front bundle to the rear bundle, each lateral harness being characterized in that the external edge of the said lateral harness lies in a radial angular position close to 0° at the rear of the coil and in a radial angular position greater than 5° at the front of the coil, so as to minimize the trapezoid differential error between the red and blue beams.

Abstract: A multiple split ring clamp for securing a printed circuit board on a cathode ray tube, in which the clamp first split ring has overlapping jaws and teeth on each end of the jaws, wherein the jaws and teeth are adapted to engage and hold the clamp on the cathode ray tube, and wherein the clamp has a second ring and stand-off which is adapted for removably securing a printed circuit board on but spaced apart from the first ring and cathode ray tube. The first split ring may be connected to but independent from the second ring and standoff so that movement of the clamp will not affect the position of the stand-off.

Abstract: A display tube has an evacuated envelope with a display panel, a cone (or funnel) portion and a neck portion. The cone portion has a cone body portion and a parabolic portion. The contour of the cone body in a plane through the longitudinal axis of the tube and the short axis of the panel is such that up to at least half the length of the cone body the cone height sinks by maximally 12%. Hereby stresses at the sealing face between the panel and the cone portion arc reduced. More in particular the Z and Y coordinates of the outer contour are such that at 0.5L=Z it holds that 0.88H<Y<H wherein H is the seal edge position on the short panel axis and L is the depth of the cone portion. Preferably the first and second area show a transition point P between 0.5L and 0.8L.

Abstract: In a cross-section including a tube axis, assuming that T1 represents a thickness of a funnel at a point on an outer circumferential surface of the funnel, which is placed at the same position in a tube axis direction as that of an end of a horizontal deflection coil on a phosphor screen side, and T2 represents a thickness of the funnel at a point on the outer circumferential surface of the funnel, which is placed at the same position in the tube axis direction as a position 7 mm away from the end of the horizontal deflection coil on the phosphor screen side to the phosphor screen side along the tube axis, the funnel includes at least one cross-section including the tube axis satisfying a relationship: T2/T1?1.18. Owing to this, cone halation can be prevented while an X-ray leakage amount is limited to a predetermined value or less.

Abstract: An insulating frame of a deflection yoke is fixed to a funnel with a metal band and a metal screw. A partition formed so as to be integrated with a holder holding a magnet ring of a CPU includes a first partition provided on a first axis so as to hide the metal screw when the deflection yoke is seen from the holder side along a tube axis, and a second partition provided on a second axis orthogonal to the first axis. A height H1 of the first partition, a height H2 of the second partition, a minimum height Hmin of the partition, a height HM of a pull of a magnet ring on a side closest to the deflection yoke, and an outer circumferential edge diameter RM of the magnet ring excluding the pull satisfy relationships: H1>H2, HM?H2>10 mm, and Hmin>RM. Because of this, a discharge between a metal band and a metal screw that fix the deflection yoke, and a velocity modulation coil can be prevented without decreasing the operability of the rotation adjustment of the magnet ring of the CPU.

Abstract: In the vicinity of an end on the side of a large diameter portion of a deflection device, a pair of first permanent magnets for converging three electron beams in an X-axis direction and a pair of second permanent magnets for diverging them in the X-axis direction are provided. Inclination coefficients KTBH and KEWH of the distribution curve near the Z axis on the X axis of the Y-axis direction magnetic flux density of the magnetic fields respectively formed by the pair of first permanent magnets and the pair of second permanent magnets satisfy KTBH/KEWH<10 in at least one location within a range of 3 to 13 mm on the side of the phosphor screen with respect to a reference line in the Z-axis direction.

Abstract: A deflection device includes a first magnetic field generator, which generates a magnetic field of the same polarity as that of a vertical deflection magnetic field during upward deflection, on an upper side from an XZ-plane, a second magnetic field generator, which generates a magnetic field of the same polarity as that of a vertical deflection magnetic field during downward deflection, on a lower side from the XZ-plane, a third magnetic field generator, which generates a magnetic field of a polarity opposite to that of the vertical deflection magnetic field during upward deflection, on the upper side from the XZ-plane, and a fourth magnetic field generator, which generates a magnetic field of a polarity opposite to that of the vertical deflection magnetic field during downward deflection, on the lower side from the XZ-plane.

Abstract: A deflection yoke includes ferrite core, horizontal deflection coil, vertical deflection coil, and insulating frame for insulating the horizontal and vertical deflection coils. The deflection yoke has a cross section that satisfies the following A to C. A: A plurality of magnetic substance convex portions projecting toward the tube axis are provided in the vicinity of a position of an inner surface of the ferrite core where a vertical axis crosses. B: Assuming that a minimum value among distances between the respective magnetic substance convex portions and a funnel is D1, the distance between the ferrite core excluding the plurality of magnetic substance convex portions and the funnel is larger than the distance D1 at any point of the ferrite core. C: A part of the vertical deflection coil is wound in a groove between the plurality of magnetic substance convex portions.

Abstract: A pair of coma coils for correcting a VCR that is a positional displacement in a vertical axis direction of a center electron beam with respect to the center of a pair of side electron beams on a vertical axis in upper and lower portions on a screen are provided at a position in the vicinity of an end of a deflection yoke on an electron gun side. Assuming that a maximum value of the intensity of a vertical deflection magnetic field on a tube axis is HMAX, and the intensity of a vertical deflection magnetic field on the tube axis at the position where the pair of coma coils are arranged in the tube axis direction is HC, HC/HMAX?0.8 is satisfied. Owing to this, high-order distortion of horizontal lines on a screen can be corrected.

Abstract: A cathode-ray tube device including a deflection yoke for deflecting an electron beam emitted from an electron gun in horizontal and vertical directions. The deflection yoke has a vertical deflection coil that deflects the electron beam vertically. The vertical deflection coil is wound toroidally around a bell-shaped ferrite core, and on the electron gun side of the ferrite core, a square “U” shaped magnetic body that is doubled back partway along in a longitudinal direction is disposed on the horizontal axis, so that the ends thereof extend towards and are separated along the tube axis.

Abstract: A projection tube apparatus includes: a valve made up of a face panel having a screen face on its external face, a funnel connected to a rear portion of the face panel, and a neck portion; an electron gun that emits an electron beam and is housed in the neck portion; and a deflection device mounted at an outer circumference of the funnel on the neck portion side. The deflection device at least includes: horizontal deflection coils that generate a horizontal deflection field for deflecting the electron beam in the horizontal direction; vertical deflection coils that generate a vertical deflection field for deflecting the electron beam in the vertical direction and is disposed outside the horizontal deflection coils; and a ferrite core disposed outside the vertical deflection coils. A distance Ls between an end portion of the horizontal deflection coils on the screen face side and the screen face is set to 55 mm?Ls?80 mm.

Abstract: A deflection yoke includes a horizontal deflection coil, a vertical deflection coil, an insulating frame made of an insulating material, a deflection adjusting plate attached to an outer circumferential surface of the insulating frame, and a ferrite core covering at least a part of an outer circumference of the insulating frame. The deflection adjusting plate is fixed to the outer circumferential surface of the insulating frame, under the condition of being surrounded by a high-soft resin material with a hardness of 10 to 60. Because of this, even when the deflection adjusting plate vibrates during driving, the deflection adjusting plate does not directly bump into the insulating frame, so that the noise generated by the deflection yoke can be reduced significantly.

Abstract: A clamp for securing a printed circuit board on a cathode ray tube, in which the clamp has a split ring with overlapping jaws and teeth on each end of the jaws, wherein the jaws and teeth are adapted to engage and hold the clamp on the cathode ray tube, and wherein the clamp has an stand-off which is adapted for removably securing a printed circuit board on but spaced apart from the cathode ray tube. The split ring may be connected to but independent from the standoff so that movement of the clamp will not affect the position of the stand-off.

Abstract: A cathode ray tube comprises a panel having a fluorescent screen on an inner surface; a funnel connected to the panel, an electron gun housed in the funnel; emitting electron beams; and a shadow mask for selecting colors of the electron beams emitted from the electron gun, wherein the deflection yoke comprises a deflection coil for deflecting the electron beams in horizontal and vertical directions, a holder for insulating the deflection coil, and a ferrite core for reducing a magnetic field generated by the deflection coil, and an opening is formed on a flange portion of an opening section on a screen side of the deflection coil.

Abstract: A ferrite core constituting a deflection yoke has a plurality of ridge-shaped convex portions on an inner circumferential surface. In a cross-section orthogonal to a center axis, the cross-sectional shape of an outer circumferential surface of the ferrite core is substantially circular, and the cross-sectional shape of an inner circumferential surface of the ferrite core excluding the convex portions is substantially circular in the vicinity of an end on a large diameter side of the ferrite core and is substantially rectangular in a portion between the vicinity of an end on a small diameter side and the vicinity of the end on the large diameter side. This can provide a low-cost color picture tube apparatus with a reduced deflection power and satisfactory productivity.

Abstract: A color cathode ray tube has features to decrease mechanical stress due to internal pressure made by evacuation. The cathode ray tube includes a panel on an inner surface of which a phosphor screen is formed. A funnel is joined to the panel. An electron gun generates electron beams, and a deflection yoke is mounted within the funnel to deflect the electron beams. The panel satisfies a condition: L1+(L2?L1)×0.35?L?L1+(L2?L1)×0.45, and more preferably a condition: L1+(L2?L1)×0.35?L<L1+(L2?L1)×0.45, wherein L1 is a distance between an inner center P of said panel and a yoke line plane; L2 is a distance between the inner center P of said panel and a neck line plane; and L is a distance between the inner center P of said panel and a reference line plane.

Abstract: A CPU for adjusting color purity and color displacement at the center of a screen is provided on an outer circumferential surface of a neck portion. BVM coils for modulating a scanning velocity in a horizontal direction of electron beams are provided at a position where they are overlapped with the CPU in a tube-axis direction. A ring-shaped ferrite core is provided at a position where it is overlapped with the BVM coils in the tube axis direction. Two surfaces vertical to a tube axis of the ring-shaped ferrite core are covered with resin layers. Because of this, the ring-shaped ferrite core can be prevented from being cracked.

Abstract: A pair of velocity modulation coils are placed with a horizontal plane including a tube axis interposed therebetween, and a pair of magnetic substances are placed with a vertical plane including a tube axis interposed therebetween. A straight line portion of the velocity modulation coil extending substantially in parallel to the tube axis is placed between the magnetic substance and the tube axis. An interval D between the magnetic substance and the straight line portion is 1 to 3 mm. Assuming that the tube axis is a Z-axis, a size of the velocity modulation coil in a tube axis direction is L, and a position of an end of the velocity modulation coil on a side opposite to a phosphor screen in the tube axis direction is Z=0, a center point of the pair of magnetic substances in the tube axis direction is present in a range of Z=0.2×L to 0.9×L. Consequently, the sensitivity of velocity modulation can be enhanced while suppressing an increase in a driving power with a simple configuration.

Abstract: A ferrite core constituting a deflection yoke includes a plurality of convex portions in a ridge shape on an inner surface thereof. Among the plurality of convex portions, assuming that the convex portions in a range excluding a range of ?20° to +20° with respect to a horizontal axis and a range of ?20° to +20° with respect to a vertical axis are diagonal convex portions, the lengths in a tube axis direction of at least horizontal axial convex portions on a horizontal axis or vertical axial convex portions on a vertical axis are larger than those of the diagonal convex portions. Because of this, a color picture tube apparatus with a deflection power reduced can be provided while the degree of freedom in a winding arrangement of deflection coils is secured.

Abstract: A deflection coil for deflecting an electron beam emitted from an electron gun is provided outside a cathode-ray tube in which the electron gun is housed, and a phosphor screen is formed. The cathode-ray tube further includes a velocity modulation coil for modulating a horizontal scanning velocity of an electron beam, a first magnetic substance surrounding an outer circumference of the cathode-ray tube from outside the velocity modulation coil, and a second magnetic substance surrounding the outer circumference of the cathode-ray tube between the deflection coil and the first magnetic substance. Because of this, the sensitivity of velocity modulation can be enhanced effectively with a simple configuration while deflection distortion is prevented.

Abstract: BVM coils for modulating a scanning velocity in a horizontal direction of electron beams emitted from an electron gun are provided at a position where the BVM coils are overlapped with an electron gun in a tube axis direction, and a pair of magnetic substance pieces are provided at a position where the pair of magnetic substance pieces are overlapped with the BVM coils in the tube axis direction. The pair of magnetic substance pieces surround a funnel continuously in a circumferential direction of an outer circumferential surface of the funnel, except for a portion of the surface that intersects a plane defined by the tube axis and a vertical direction axis, and the vicinity of that portion. Because of this, a cathode-ray tube apparatus with the sensitivity of the BVM coils enhanced can be provided.

Abstract: A deflection yoke is used for a cathode ray tube (CRT) including a glass tube having a screen surface and a straight portion for accommodating an electron gun. The deflection yoke includes a main deflection yoke including first and second horizontal deflecting coils and first and second vertical deflecting coils, and a sub-deflection yoke provided at a side of the main deflection yoke towards the electron gun of the CRT. The first and second horizontal deflecting coils have substantially saddle shapes and includes first and second coil-connection-wire sections and first and second horizontal deflection sections, respectively. The first and second coil-connection-wire sections are wound in a direction perpendicular to a tube axis of the CRT and along the straight portion, respectively. The first and second horizontal deflection sections are located towards the screen surface from the first and the second coil-connection-wire sections, respectively.

Abstract: A deflection apparatus for a cathode ray tube includes a horizontal deflection coil, a vertical deflection coil positioned external to the horizontal deflection coil, an insulating member interposed between the horizontal and the vertical deflection coils, and a core placed on the insulating member while being connected to the vertical deflection coil. The horizontal deflection coil, the vertical deflection coil, the insulating member and the core have at least one sectional structure proceeding perpendicular to the tube axis of the cathode ray tube. With any one of the horizontal and the vertical deflection coils, the sectional structure is formed with a combination of arcs corresponding to a horizontal axis X, a vertical axis Y and a diagonal axis between the horizontal and the vertical axes X and Y. The arc corresponding to the horizontal axis X or the vertical axis Y is formed with an arc centering around a point on the axis other than the horizontal axis X or the vertical axis Y.

Abstract: The invention is a color cathode-ray tube having a rectangular front face connected to a funnel shaped rear part, a neck connected to the rear part and having an electron gun therein, the gun is used to generate beams intended to scan the front face under the influence of a deflection device placed on the neck of the tube. The deflection device comprising correction magnets placed on the periphery of the device in locations closest to the front face and a magnetic screen within the tube having an opening for passage of the electron beams, wherein the opening has notches in its periphery. The notches are arranged so as to face at least one pair of correction magnets.

Abstract: A permanent magnet is selectively picked for a deflection yoke and provided on the periphery of the cathode ray tube for controlling the direction of an electron beam emitted towards a screen from an electron gun. The permanent magnet can adjust an irradiating point of the electron beam. The permanent magnet incorporates a magnetic substance that can be applied to at least one of the end faces of the magnet with a negative temperature characteristic. The magnetic substances can have different configurations and based on the saturation flux density of the permanent magnet, can be selected to match the permanent magnet to correct variation in the saturation flux density.

Abstract: On an outer circumferential surface of a neck portion of a funnel, a CPU having a pair of quadrupole magnets and a pair of bar-shaped magnets each having magnetic poles on both sides in a major axis direction are provided. The pair of bar-shaped magnets sandwich the neck portion substantially in an in-line direction of an in-line type electron gun, and are provided so that identical poles are opposed to each other, between an end plate of an insulating frame of a deflection yoke and the CPU at a distance from the end plate. In the case where a rotational shift of electron beams is caused, electron beams R and B are corrected so as to move upward and downward (or downward and upward) respectively by a quadrupole magnetic field generated by the quadrupole magnets. Then, the electron beams R and B are corrected so as to move downward and upward (or upward and downward) respectively by the quadrupole magnetic field generated by the pair of bar-shaped magnets.

Abstract: A CRT apparatus is composed of a CRT, a deflection yoke, a velocity modulation coil, and a magnetic member. The CRT includes a glass bulb made up of a panel and a funnel connected together and an electron gun housed within the glass bulb, and emits an electron beam from the electron gun toward a phosphor screen formed on an inner surface of the panel. The deflection yoke includes a horizontal deflection coil and a vertical deflection coil, and scans the electron beam over the phosphor screen. The velocity modulation coil is arranged outside the CRT, and modulates a velocity at which the electron beam is scanned horizontally. The magnetic member is arranged to surround an outer circumference of the CRT with the velocity modulation coil positioned therebetween, so as to cover a position corresponding to a space between axially aligned electrodes of the electron gun.

Abstract: Deflection yoke for cathode-ray tubes with a north/south geometry correction comprising a pair of horizontal deflection coils and a pair of vertical deflection coils, the two pairs being isolated one from the other by a separator, a ferrite ring at least partly covering the deflection coils and having a flared front part, the deflection yoke comprising in its front region at least one pair of magnetic means to modify locally the magnetic field in the said front region and to correct the geometry of the image created on the screen of the tube, the magnetic means being placed in the space in such a way that, for a plane containing the longitudinal axis of the deflection yoke and the axis of symmetry of a magnetic means, and for the point M of the plain corresponding to the point of minimum coordinates of the said means, the intersection of the ring with is at least partly in its front part, located outside the region delimited by the half line passing through M and perpendicular to Z, and the half line passing

Abstract: A color picture tube apparatus having a system for increasing an upper and lower pincushion distortion in the peripheral portion in the vertical direction by making the preliminary vertical deflection force when an electron beam is deflected toward the peripheral portion in the vertical direction of a phosphor screen relatively smaller than the preliminary vertical deflection force when an electron beam is deflected toward the middle portion in the vertical direction of the phosphor screen. With the color picture tube apparatus using an S-shaped distortion correction circuit, an upper and lower inner pincushion distortion can be optimized while correcting the upper and lower pincushion distortion.

Abstract: A cathode ray tube having a ferrite core with a modified sectional configuration facilitates the correction of a mis-convergence along a diagonal direction of a screen, improves the efficiency with which electrons within electron beams are deflected, and is manufacturable via a simplified process.

Abstract: This invention relates to a cathode ray tube having a funnel in the shape of a reverse curvature designed to improve the strength for the glass manufacturing process and test specification. In the present invention, a reverse radius is applied to the whole of the rear-side glass, which is the funnel, of the cathode ray tube. Therefore, the cathode ray tube has a high degree of strength for vacuum and a low weight, so that it can have a wide angle of the electric beam in accordance with the enlargement and the flattening plane of the cathode ray tube. The cathode ray tube that has the funnel in the shape of the reverse curvature comprises: a yoke on which a deflection coil is placed; and a body part that extends from the yoke toward an opening terminal attached to the panel.

Abstract: Deflection yoke for a cathode-ray tube has at least one pair of saddle-shaped coils. The saddle-shaped coils form an asymmetric field in the vicinity of a front conductor assembly. The field asymmetry is produced by an inclusion near the front conductor assembly of at least a metal piece. The purpose of this asymmetry is to minimize the effects of an orthogonality defect between the deflection fields created by the horizontal and vertical deflection coils on the geometry of the image.

Abstract: A deflection yoke for a cathode ray tube includes a ferrite core that has a body that is funnel-shaped and with an inner surface and an outer surface, the inner surface of the ferrite core including a first section formed as a circle with a predetermined, unvarying radius; a second section formed as a circle with a varying radius, the second section being connected to the first section; and a third section having a non-circular cross section and connected to the second section.

Abstract: A deflection yoke mounted on a rear portion of a cathode ray tube (CRT) to deflect an electron beam emitted from an electron gun of the CRT includes a coil separator mounted on the CRT, a horizontal deflection coil mounted on an inside of the coil separator, having a first section generating a horizontal deflection magnetic field deflecting the electron in a horizontal direction and having a first radius, having a second section generating a magnetic field to weaken the horizontal deflection magnetic field and having a second radius different from the first radius, a vertical deflection coil mounted on an outside of the coil separator and generating a vertical deflection magnetic field deflecting the electron beam in a vertical direction, and a ferrite core covering a portion of the vertical deflection coil to strengthen the horizontal deflection magnetic field and the vertical deflection magnetic field.

Abstract: The present invention relates to a cathode ray tube, and more particularly, to a funnel for CRT to increase the BSN neck shadow margin by changing the shape of the yoke portion.

Abstract: The invention provides a deflection yoke device comprising a main yoke portion 4 for deflecting an electron beam emitted by an electron gun, and a convergence yoke portion 5 for adjusting the convergence of the electron beam. The convergence yoke portion 5 comprises an annular convergence core 53, a convergence horizontal coil 51 wound around both of left and right two regions of the core 53 which intersect a horizontal axis, and a convergence vertical coil 52 wound around both of upper and lower two regions of the core 53 which intersect a vertical axis. Short-circuited coils 54, 54 are provided around the respective left and right two regions of the core 53.

Abstract: A resistor for an electron gun assembly includes an insulating substrate, a plurality of electrode elements provided on the insulating substrate, a resistor element provided on the insulating substrate and having a pattern for obtaining a predetermined resistance value between the electrode elements, an insulating coating layer that covers the resistor element, a plurality of metal terminals that are connected to the associated electrode elements, and a lead-out wire that extends from at least one of the electrode elements and is electrically connected to the resistor element. By extending and connecting the lead-out wire to a desired position on the resistor element, the resistor is made adaptable to various alterations and a desired resistance division ratio can exactly be obtained.

Abstract: A color picture tube device that can adjust convergence without causing increases in cost and in power consumption is provided. One pair of magnetic flux generation means for generating a static quadrupole magnetic field are positioned above and below an area where a plurality of electron beams pass through. The static quadrupole magnetic field has an effect of adjusting convergence in a horizontal direction. In this construction, a magnetic flux generated by one of the two magnetic flux generation means that is closer to the plurality of electron beams is reduced, in sync with deflection of the plurality of electron beams in a vertical direction.

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: The present invention relates to a display device comprising a cathode ray index tube (1) having a neck portion (1?) and a screen portion (1). The display device comprises an electron gun assembly (3) for generating a plurality of electron beams (3R,3G,3B), positioned in the neck portion (1?) of the cathode ray index tube (1), a deflection unit (5), placed around the neck portion (1?) of the cathode ray index tube (1), for deflecting said plurality of electron beams (3R,3G,3B), and a convergence unit (6) for converging said plurality of electron beams (3R,3G,3B). The deflection unit (5) is placed at an axial distance from said electron gun assembly (3), closer to said screen portion (1?). The convergence unit (6) is placed in close proximity to the deflection unit (5).

Abstract: Sensitivity of a velocity modulation device is increased and noise such as a leakage magnetic field and a leakage electric field from the device are reduced to thereby lower power consumed by the device. A cathode ray tube device and a television set each include a velocity modulation device on a cathode side of a deflection yoke. All or part of the circumference of a velocity modulation coil to modulate scan beam velocity is covered with material having an initial permeability of at least 10 at 2 MHz.

Abstract: The invention provides a deflection yoke comprising: a tube-shaped core made of a magnetic material that has on its inner wall, ridges each of which extends along the CRT axis direction, the ridges being arranged circumferentially at intervals and thereby forming slots; a vertical deflection coil wound so that part of its length is disposed in the slots; and a horizontal deflection coil wound so that part of its length is disposed in the slots, wherein the slots include (a) first slots in which one of the horizontal deflection coil and the vertical deflection coil is disposed and (b) second slots in which both of the deflection coils are disposed, and the bottom of each first slot is, for part or all of the length of the slot, closer to the external surface of the evacuated envelope than the bottom of each second slot is.

Abstract: A rectangular-shaped deflection yoke, RTC (Round Core Tetra Coil Combined Deflection Yoke) enhances deflection sensitivity of a cathode-ray tube. More specifically, a deflection yoke structure for a cathode-ray tube is mounted with rectangular shaped deflection coils and circular shaped ferrite cores, and the difference between a maximum gap and a minimum gap for the deflection coil and the ferrite core is greatest at an end section on a screen side of the ferrite core.