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| Number | Title | Issue Date |
| 7071606 | Color picture tube A color picture tube in which an electron gun emits three electron beams arranged in line, in which the diameter of the spot (26) at the center of the screen in the in-line direction is smaller than that in the direction perpendicular to the in-line direction... | 07/04/2006 |
| 6984929 | Color picture tube apparatus with pincushion distortion correction 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 po... | 01/10/2006 |
| 6927531 | Electron gun and color picture tube apparatus that attain a high degree of resolution over the entire screen A set of three cathodes, a control electrode, an accelerating electrode, a first focus electrode, a second focus electrode, a third focus electrode, a fourth focus electrode, a final accelerating electrode and a shield cup electrode are provided successively in an e... | 08/09/2005 |
| 6703775 | Color cathode ray tube apparatus with an electron gun having an intermediate electrode In an electron gun for a color cathode ray tube apparatus of this invention, one intermediate electrode is arranged between a final acceleration electrode and a focus electrode that make up a main lens, and a voltage divided by a voltage dividing resistor... | 03/09/2004 |
| 6642646 | Electron gun for color cathode ray tubes with side electron-beam-passing apertures of plurality of circular arcs having different radii of curvature An in-line electron gun for a colored cathode ray tube has an electronic field correction plates with a central key-hole shaped aperture with two opposite straight lines and two side apertures each with a plurality of vertical and horizontal in addition t... | 11/04/2003 |
| 6597100 | Magnetic shield for a cathode ray tube A magnetic shield (20) for a cathode ray tube includes a body portion and a skirt section (21) around the body portion. The skirt section (21) has a skirt portion (23) having a free edge (25) and being connected to the body portion at its opposite edge (2... | 07/22/2003 |
| 6437500 | Seamless electron transfer for multiple-gun direct view CRTS A CRT for the display of a large screen television set which includes a tube envelope having a pair of tube necks and a phosphor display screen, a pair of electron guns arranged in a same horizontal plane and each positioned in a different one of the tube... | 08/20/2002 |
| 6404149 | Cathode ray tube apparatus An electron gun assembly forms an electron beam generator, pre-focusing lens, sub-lens, and main lens. The sub-lens has a weaker horizontal focusing power than the vertical one, and the main lens has a stronger horizontal focusing power than the vertical ... | 06/11/2002 |
| 6396206 | Cathode ray tube having multiple sets of orbital correction coils An electron gun which emits three electron beams consisting of a center beam and paired side beams arranged in line in the horizontal axis is arranged in the neck of the vacuum envelope. A neck-side orbital correction coil unit for over-converging the sid... | 05/28/2002 |
| 6316871 | Compensation device for convergence drift used in cathode ray tube A compensation device for convergence drift used in a CRT, including a convergence electrode attached on an outer surface of a neck portion, an inducement means for inducing static electricity from a voltage to be supplied for an inner graphite layer, and... | 11/13/2001 |
| 6184615 | Traveling wave deflection system having helical conductors coiled on insulating cores of a specifiable specific dielectric constant A vertical deflection system for a CRT is disclosed which has a pair of traveling wave deflectors disposed opposite each other across a path of beam from gun to target. Each deflector has a helical conductor in the for of a strip of sheet metal coiled aro... | 02/06/2001 |
| 5932959 | Deflection yoke and color cathode ray tube with deflection yoke A deflection yoke for a cathode ray tube can correct both the pincushion distortion at the upper and lower edges of the screen and the misconvergence of the screen at the same time by the deflection yoke itself without the need for a correction magnet. Th... | 08/03/1999 |
| 5869923 | CRT with neck-gripping beam-correcting ferrite-ring assembly A rigid ferrite-containing ring and plastic holder are described for mounting on the neck of a color cathode ray tube (CRT) which ring is to be custom magnetized in order to provide correction of static convergence, color purity and/or frame errors in the... | 02/09/1999 |
| 5783901 | Deflection yoke with a core having a higher magnetic reluctance at the top and bottom portions than the sides A deflection yoke for a cathode ray tube can correct both the pincushion distortion at the upper and lower edges of the screen and the misconvergence of the screen at the same time by the deflection yoke itself without the need for a correction magnet. Th... | 07/21/1998 |
| 5780963 | Deflection yoke A deflection yoke is comprised of a pair of separators 1a, 1b. A cylindrical neck 3 is formed on the pair of separators. Magnetic rings 7, 8, 10, 11 are installed on the neck. A spacer 19 is inserted between the magnet rings 8 and 10. A clamp band 5 is in... | 07/14/1998 |
| 5757120 | Color cathode ray tube with decenterable magnetic body A color cathode ray tube device is provided in which the generation of the trapezoidal distortion of a rectangular raster is controlled and an off-axis misconvergence is corrected to obtain high image quality in the peripheral portion of a screen. An annu... | 05/26/1998 |
| 5747924 | Picture distortion correcting apparatus There is provided a picture distortion correcting apparatus for correcting substantially improves a magnetic field correcting effect in which a special picture distortion corrected even when the same magnet volume as a conventional magnet is used. Rod-sha... | 05/05/1998 |
| 5233267 | Dynamic convergence system for color cathode ray tubes having an in line electron gun A color cathode ray tube equipped with an in-line type electron gun, a deflection yoke designed to generate a uniform deflection magnetic field, the in-line type electron gun having a focusing grid which accommodates three pole pieces of magnetic bodies, ... | 08/03/1993 |
| 5227692 | Magnet assembly for correcting CRT misconvergence A convergence correcting magnet assembly means for adjusting the position of plural correcting magnets closer to or further from electron beams in a cathode ray tube, preferably comprising four bipolar magnets arranged in two offset pairs, one pair orient... | 07/13/1993 |
| 5182487 | Deflection yoke device A deflection yoke device for deflecting an electron beam traveling in the interior of a CRT. The distribution of a magnetic field supplied by horizontal deflection coils to the interior of the CRT forms a barrel magnetic field on the panel side and the ne... | 01/26/1993 |
| 5177410 | Image display device An image display device includes comb-shaped horizontal deflection electrodes disposed interleavingly in a first plane with a space therebetween for forming electron beam passages and comb-shaped vertical deflection electrodes disposed interleavingly in a... | 01/05/1993 |
| 5134337 | Projection lens assembly for planar electron source A projection lens assembly (10) projects onto a display screen (38) electrons emitted from an output side (86) of an electron multiplier such as, for example, a microchannel plate (70). The projection lens assembly includes a dome-shaped mesh element (16)... | 07/28/1992 |
| 5107172 | Charged-particle beam tube and its driving method A charged-particle beam tube having an envelope of a dielectric material and a pattern yoke formed on the inner surface of the envelope. The pattern yoke has a pair of horizonal deflection electrodes and a pair of vertical deflection electrodes arranged a... | 04/21/1992 |
| 5038075 | Traveling-wave deflection system in a cathode-ray tube with conducting core on helical conductor. A traveling-wave deflection system comprising a pair of deflectors disposed opposite each other across the path of an electron beam from an electron gun to a screen in a cathode-ray tube. Each deflector has a helical conductor wound around a core structur... | 08/06/1991 |
| 5017832 | Magnetic cancelling apparatus for color cathode-ray tube A magnetic cancelling apparatus for a color cathode-ray tube which is to cancel external magnetic fields acting on the color cathode-ray tube, can prevent deterioration of the screen color purity. The apparatus includes a magnetic sensor for detecting a m... | 05/21/1991 |
| 4967120 | Electron gun assembly of color ray tube In an electron gun assembly of an in-line type, electron beams emitted from cathode pass through first, second and third grid electrodes and are accelerated and controlled by the electrodes. The accelerated and controlled electron beams are converged by a... | 10/30/1990 |
| 4922167 | Picture display device having means for compensating line stray fields Picture display device having a display tube (3) and a deflection unit (9) comprising a field deflection coil and a line deflection coil (11). To comply with a predetermined interference radiation standard, the picture display device comprises a first set... | 05/01/1990 |
| 4900979 | Color cathode ray apparatus provided with dynamic convergence means In a color cathode ray apparatus, three electron beams emitted from electron gun assembly are correctly converged on a peripheral region of a peripheral region of a phosphor screen and are weakly converged on a center region of the phosphor screen by stat... | 02/13/1990 |
| 4899091 | Cathode-ray-tube astigmatism correction apparatus Apparatus for correcting astigmatism produced by the electromagnetic deflection yoke of a cathode-ray-tube includes stigmator electrodes provided with elongated slots through which the cathode-ray-tube's electron beam or beams pass. Appropriate correction... | 02/06/1990 |
| 4891552 | Image display apparatus with means for correcting image distortion An image display apparatus for displaying images on a fluorescent screen comprising plural linear cathodes, an electron beam extraction electrode with plural apertures and vertical deflection electrodes which are formed by segments. The respective segment... | 01/02/1990 |
| 4857796 | Cathode-ray tube with electrostatic convergence means and magnetic misconvergence correcting mechanism A cathode-ray tube which has an electron gun and a correcting unit with a magnetic device electrically coupled to a final electrode of the electron gun so as to selectively apply a uniform magnetic field to required ones of a plurality of electron beams, ... | 08/15/1989 |
| 4833364 | Electron gun for color picture tubes having uniquely formed lens apertures An electron gun for a color picture tube has at least a cathode, a control grid, an accelerating grid, a focus grid and an anode, each of which has three apertures aligned in line. The focus grid and the anode made of elongated plates serves as main lens ... | 05/23/1989 |
| 4823046 | Color picture tube with astigmatism correction means An in-line color picture tube including a deflection unit having a system of deflection coils accommodating two sets of soft magnetic correction elements. The first set is provided in the proximity of the center of the vertical deflection field and symmet... | 04/18/1989 |
| 4763003 | Method and apparatus for correcting high-order abberations in particle beams A technique for correcting spherical and other aberrations in a particle beam. Spherical aberration is caused by variations in beam behavior dependent on the cube of the radius or radial position with respect to the beam axis. To correct for such aberrati... | 08/09/1988 |
| 4672276 | CRT astigmatism correction apparatus with stored correction values Apparatus for correcting astigmatism produced by the electromagnetic deflection yoke of a cathode-ray-tube includes plural stigmator electrodes provided with elongated slots through which the cathode-ray-tube's electron beam passes. Appropriate correction... | 06/09/1987 |
| 4663572 | Process for suppressing electron beam drift phenomenon in a cathode ray tube By application of a predetermined period of relatively higher magnitude of electron beam emission from the cathode of the electron gun to the anode maintained at high voltage the potential gradient on the inside of the neck portion of a cathode ray tube i... | 05/05/1987 |
| 4580078 | Method of adjusting color purity in a television receiver, and television receiver with purity-adjustment system To correct the beam direction, and thus the color purity of color television tubes, particularly in tubes having fixedly secured deflection systems (10), the deflection field is, upon adjustment for color purity, additionally modified by introducing a uni... | 04/01/1986 |
| 4424466 | Cathode ray tube with multipole correction ring A cathode ray tube including, in an evacuated envelope, at least one electron gun to generate an electron beam directed onto a target, and first and second pairs of deflection plates for deflecting the electron beam in two mutually perpendicular direction... | 01/03/1984 |
| 4205253 | Elimination of landing errors in electron-optical system of mixed field type In an electron-optical system of the mixed field type in which magnetic and electric fields are respectively operative to project a focused image of an object of the system upon a target structure and to simultaneously scan such image across the target st... | 05/27/1980 |
| 4188563 | Cathode ray tube having an electron lens system including a meshless scan expansion post deflection acceleration lens A cathode ray tube includes first and second electrostatic quadrupole lens between the electron gun and the vertical deflection plates to properly focus the electron beam before it enters the vertical deflection plates. A third electrostatic quadrupole le... | 02/12/1980 |
