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"I hate what they've done to my child...I would never let my own children watch it. "
Vladimir Zworykin, television pioneer ; Talking about an invention in which he played a critical role.
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| Number | Title | Issue Date |
| 7333149 | Apparatus and method for converting analog and digital video format The present invention provides an apparatus for converting a video format of a digital TV and method thereof, by which various functions such as video format detection, color space conversion, chroma format conversion, gamma correction, geometric correction, image q... | 02/19/2008 |
| 7126292 | Cathode-ray tube apparatus 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 modulatin... | 10/24/2006 |
| 7122977 | Cathode-ray tube apparatus 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 th... | 10/17/2006 |
| 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 |
| 7061171 | Color cathode ray tube A color cathode ray tube comprising a panel, said panel including an outer surface which is substantially flat and an inner surface on which a screen composed of red, green and blue phosphors is formed, wherein a screen transmittance of the panel increases and then ... | 06/13/2006 |
| 6987367 | Cathode-ray tube A prefocus lens section in an electron gun assembly includes a second grid that is disposed on an electron beam generating section side, a third grid that is disposed on a main lens section side, and a shield grid that is disposed between the second grid and the thi... | 01/17/2006 |
| 6946784 | Electron gun of monochromic CRT The present invention is to provide an electron gun of a monochromic CRT comprising at least two electron emission sources (e.g., cathodes) for emitting beams having a small beam spot size and being adapted to impinge on the same spot of a screen of the monochromic ... | 09/20/2005 |
| 6909227 | Color cathode ray tube The present invention provides a color cathode ray tube having a shadow mask for selecting colors, wherein the shadow mask satisfies the relation: 5.5 | 06/21/2005 |
| 6906470 | Method and system for controlling electron beams from field emission cathodes 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.... | 06/14/2005 |
| 6903519 | Multi-element field emission cathode 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.... | 06/07/2005 |
| 6819038 | Double dynamic focus electron gun An electron gun for a cathode ray tube includes at least one auxiliary quadruple lens forming unit adapted to control an electron beam diverging in the vertical direction and focused in the horizontal direction by a plurality of focus electrodes, at least one first ... | 11/16/2004 |
| 6812654 | Field emission type electron source element, electron gun, cathode ray tube apparatus, and method for manufacturing cathode ray tube 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 ... | 11/02/2004 |
| 6794822 | Field emission electron source, electron gun and cathode ray tube device using the same A field emission electron source includes: a field emission array portion composed of an insulation layer with a plurality of apertures, which is formed on a substrate, an extraction electrode formed on the insulation layer, and a plurality of cathodes formed respec... | 09/21/2004 |
| 6696789 | Color picture tube device The present invention provides a high-resolution color picture tube device with a decreased beam spot diameter. The color picture tube device has an electron gun including cathodes, a control electrode, an accelerating electrode, a G3 electrode, a first f... | 02/24/2004 |
| 6657372 | Color cathode ray tube A color cathode ray tube having an electron gun including an electron beam generating portion arrayed in a horizontal direction for generating three electron beams, and a main lens for focusing the three electron beams from the electron beam generating po... | 12/02/2003 |
| 6566801 | Cathode ray tube A cathode ray tube comprising an electron source and an electron beam guidance cavity having an input aperture and an output aperture, wherein at least a part of the wall of the electron beam guidance cavity near the output aperture comprises an insulatin... | 05/20/2003 |
| 6555975 | Cathode-ray tube apparatus A main lens includes a second segment, a sixth grid and an additional electrode disposed between the second segment and the sixth grid. A first-level constant voltage and a second-level constant voltage are applied to the second segment and sixth grid, re... | 04/29/2003 |
| 6538397 | Color cathode-ray tube apparatus A color cathode-ray tube apparatus comprises an electron gun structure having a plurality of electrodes for constituting a plurality of electron lenses including a main lens for focusing an electron beam on a phosphor screen, and a deflection yoke for pro... | 03/25/2003 |
| 6525459 | CRT beam landing spot size correction apparatus and method A 90 percent electron gun aperture astigmatism is used in conjunction with a four-pole electromagnet to make a CRT electron beam just focus point and minimum beam width occur closer to the same focus voltage. A single grid may have the 90 percent astigmat... | 02/25/2003 |
| 6515438 | Electron gun in color CRT Electron gun in a color CRT including a controlling electrode and an accelerating electrode each having a distance S0 between a central electron beam pass through hole and an outer electron beam pass through hole for passing electron beams emit... | 02/04/2003 |
| 6479952 | CRT display apparatus A display apparatus includes a CRT, the CRT including an electron gun having a cathode, a G1 electrode, a G2 electrode, and a G3 electrode disposed in that order to draw electrons from the cathode. The electron gun further has a modulating Gm electrode di... | 11/12/2002 |
| 6455995 | One-pin dynamic electron gun for a cathode ray tube A solid dielectric material is installed between the second focus electrode and third focus electrode in a one-pin dynamic electron gun assembly in order to increase capacitance between the two electrodes. The increased capacitance between the two electro... | 09/24/2002 |
| 6441566 | Color cathode ray tube and color picture tube apparatus having the same The thickness of a face panel is greater at a peripheral edge portion than at a center portion. At the inner surface of the face panel, a curvature radius in a short axis direction on a long axis is set to decrease from the center of the face panel toward... | 08/27/2002 |
| 6433469 | Cathode ray tube having an internal voltage-dividing resistor A cathode ray tube includes an evacuated envelope having a panel portion having a phosphor screen, a neck portion and a funnel portion connecting the panel portion and the neck portion; an electron gun housed in the neck portion having a cathode, a first ... | 08/13/2002 |
| 6339293 | Cathoderay tube An electron gun assembly of a cathode ray tube has a main electron lens section comprising at least four electrodes, provided in a sequence of first, second, third and fourth grids, a middle first voltage is applied to the first grid, and an anode voltage... | 01/15/2002 |
| 6337546 | Method of mounting electrode for outputting signal generated in cathode ray tube, signal outputting method in cathode ray tube, and cathode ray tube A method of mounting a signal outputting electrode for outputting an electric signal generated in an envelope of a cathode ray tube to the outside without being adversely influenced by a getter. A signal outputting electrode is mounted in an area which is... | 01/08/2002 |
| 6313576 | Color cathode ray tube A color cathode ray tube having an electron gun including an electron beam generating portion arrayed in a horizontal direction for generating three electron beams, and a main lens for focusing the three electron beams from the electron beam generating po... | 11/06/2001 |
| 6166483 | QPF electron gun with high G4 voltage using internal resistor An internal resistor within a color cathode ray tube (CRT) is connected to a voltage source and is coupled across a G4 grid and a G6 grid of the CRT's multi-grid quadrupole (QPF) electron gun. De-coupling the G4 grid from the G2 grid in the electron gun's... | 12/26/2000 |
| 5977726 | CRT system using electrostatic quadruple lens A CRT system is provided, preventing the resolution on a phosphor screen from degrading due to the characteristic or performance variation and/or deviation of an electron gun. The electron gun has cathodes for emitting R, G, and B electron beams. First an... | 11/02/1999 |
| 5977727 | Electron beam profile and energy shaping lens An apparatus and method to dynamically shape the projected energy profile of an electron beam and the energy distribution of an electron beam of a cathode ray tube to provide a single cathode ray tube the ability to display multiple image formats of varyi... | 11/02/1999 |
| 5869925 | Electron gun with focusing electrodes A Focusing electrode in an electron gun for a color cathode ray tube provides a higher degree of freedom in electron gun design and reduces errors during assembly of the electron gun. A first focusing electrode that receives a constant voltage has vertica... | 02/09/1999 |
| 5739630 | Color cathode ray tube A color cathode ray tube which has its resolution improved all over its screen covering the central portion and the peripheral portion, either by elongating or narrowing the plate length of plate electrodes 243, which are formed between a first kind of fo... | 04/14/1998 |
| 5734235 | Electron gun with reduced astigmatism and curvature of field and CRT employing same An electron gun for a cathode ray tube includes an accelerating electrode to be supplied with a maximum voltage, a focus electrode disposed adjacent to but spaced from the accelerating electrode, and a focus-corrective electrode adjacent to but spaced fro... | 03/31/1998 |
| 5719475 | Electron gun with a dynamic driving quadrupole lens for a color cathode ray tube An electron gun having an improved circuitry for driving the electron gun, which includes a cathode ray tube accommodating at least a cathode, a control electrode, a first acceleration electrode, a convergence electrode comprising first and second grids s... | 02/17/1998 |
| 5671025 | Digital convergence correcting method and apparatus adopting the same A digital convergence correcting apparatus for a projection-type television set performs an interpolation calculation by employing an auxiliary calculating processor, to thereby perform faster convergence correction. In addition, an OSD block permitting u... | 09/23/1997 |
| 5532547 | Electron gun for a color cathode-ray tube An electron gun for a color cathode-ray tube, adapted for large television sets or high-definition monitors, has first and second quadrupole electrodes connected to a static voltage focus electrode and to a dynamic voltage focus electrode, respectively, t... | 07/02/1996 |
| 5481157 | Electron gun for cathode-ray tube An electron gun for the cathode-ray tube is disclosed, in which an early stage lens unit and a main lens unit are respectively constructed as a bipotential form lens. A high voltage equivalent to the voltage applied to a grid of the main lens unit is appl... | 01/02/1996 |
| 5479067 | Vacuum tube comprising a ceramic element and a method of interconnecting a ceramic element and a conductive element A vacuum tube includes a ceramic element and a conductive element. A conductive connection consisting of a first layer containing silver and a filler and a second layer containing silver, gold or copper is formed between the ceramic element and the conduc... | 12/26/1995 |
| 5455481 | Electrode structure of an electron gun for a cathode ray tube An electrode structure of an electron gun for a cathode ray tube has a plurality of cathodes for emitting thermions, grid electrodes to form an electron beam of thermions, a first acceleration and focus electrode, a second acceleration and focus electrode... | 10/03/1995 |
| 5424619 | Dynamic convergence device for color cathode-ray tube A dynamic convergence device in a color cathode-ray tube has two pairs of confronting high- and low-voltage electrode plates disposed in a color cathode-ray tube bulb and arranged such that a central electron beam will pass between the high-voltage electr... | 06/13/1995 |
