Electron gun for color cathode ray tube
AssigneeLG. Philips Displays Korea Co., Ltd.
InventorYoun Jin Kim
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Abstract
The present invention discloses an electron gun for a color cathode ray tube. In order to efficiently penetrate a speed modulation magnetic field of a velocity modulation coil, at least two focus electrodes of main electrodes receiving a fixed focus voltage are arranged in a row in the electron gun. When a sum of lengths of the focus electrodes is ‘L’ and a sum of intervals of the electrodes is ‘g’, ‘(g×100)/L=5˜30(%)’ is satisfied.
Claims4
In a cathode ray tube having a cathode for emitting an electron beam to a fluorescent screen, an electron gun having an anode electrode of a screen side and focus electrodes of a cathode side, and a velocity modulation coil using a position of the focus electrode as a center of a magnetic field, being positioned on a neck unit of the cathode ray tube, and being synchronized with an image signal of a circuit, the electron gun comprising at least two focus electrodes of main electrodes receiving a fixed focus voltage, wherein when a sum of lengths of the focus electrodes is ‘L’ and a sum of intervals of the electrodes is ‘g’, ‘(g×100)/L=5˜30(%)’ is satisfied.
Dependencies are inferred from the claim text.