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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7045976 | High definition electron gun for cathode ray tube Electron gun for cathode ray tube comprising aligned in series along an axis XX′ an electron-emitting cathode K, electrodes G1 and G2 for the formation of an electron beam, a prefocusing electron lens G3, G4, G5, a first quadripo... | 05/16/2006 |
| 6919675 | Color cathode ray tube In an electron gun including a cathode, a control electrode, an acceleration electrode G2, a focusing electrode G3 and an anode, longitudinally elongated concave SL-V which surround an electron beam aperture G2-H and have a long axis in the vert... | 07/19/2005 |
| 6825621 | Electron gun for color cathode ray tube An electron gun for a color cathode ray tube includes a cathode which is a source for emitting an electron beam, a control electrode, through which the electron beam emitted from the cathode passes, having first electron beam passing holes each including a first ver... | 11/30/2004 |
| 6611103 | Electron gun assembly for cathode ray tube An electron gun assembly for a CRT includes three cathode electrodes, a control electrode, an electron-stream extractor electrode, a focusing electrode, and an anode electrode. The electron-stream extractor electrode includes first, second, and third hole... | 08/26/2003 |
| 6538385 | Cathode-ray tube and flat electrode of electronic gun and production method A cathode-ray tube includes a plate having a first hole on a first surface of the plate and a second hole on a second surface of the plate. The first and second holes coupled together to allow electron beams to pass therethrough. The plate is a unitary st... | 03/25/2003 |
| 6512339 | CRT display device In a CRT display device including a CRT (MM tube) having brightness higher than that in the background-art CRT, it is an object of the present invention to improve contrast and prevent conspicuous recognition of noises. A video signal modulation circuit (... | 01/28/2003 |
| 6456017 | Electron gun for cathode ray tube An electron gun for a cathode ray tube has a cathode structure, a control electrode, a screen electrode, focusing electrodes, and a final accelerating electrode. R, G, and B electron apertures of one pair of the focusing electrodes face each other to form... | 09/24/2002 |
| 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 |
| 5751122 | Digital convergence correction system Digital convergence correction system for correcting misconvergence on a screen of a multi-mode projection television, including a first memory part for storing adjustment point data for every mode of multi-modes, a second memory part for storing converge... | 05/12/1998 |
| 4988926 | Color cathode ray tube system with reduced spot growth A color cathode ray tube system comprising three coplanar electron guns and one deflection unit. A dynamically controlled element driving the outer electron beams away from each other is arranged at the input side of the deflection unit. The underconverge... | 01/29/1991 |
