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US 6,184,617 B2Granted
Electron guns for precluding distortion of beam spots
AssigneeGoldstar Co., Ltd.
InventorJin Yeol Choi
Life of this patent
Estimating the term…
Abstract
An electron gun for a color cathode ray tube contains a cathode, first grid, second grid and third grids, sequentially disposed between the cathode and a screen, and wherein the vertical length of electron beam passing hole formed on the first and third grids is longer than the horizontal length thereof and the vertical length of an electron beam passing hole formed on the second grid is shorter than the horizontal length thereof.
Claims5
An electron gun for precluding the distortion of beam spot comprising:
- a cathode for emitting thermions;
- a first controlling electrode grid having an electron beam passing hole in which the vertical length of the electron beam passing hole is longer than the horizontal length and which controls the emitted thermions;
- a second accelerating electrode grid having an electron beam passing hole in which the vertical length of the electron beam passing hole is shorter than the horizontal length and which accelerates the thermions;
- and
- a third focusing electrode grid having an electron beam passing hole in which the vertical length of the electron beam passing hole is longer than the horizontal length and which focuses the emitted thermions.
2 more elements
Dependencies are inferred from the claim text.