Electron gun assembly and cathode ray tube with the same
AssigneeSamsung SDI Co., Ltd.
InventorsBong-Wook Jung, Deog-Ho Kim, Kwang-Jin Yun, Se-Ja-Chul Hwang
Life of this patent
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Abstract
An electron gun assembly for a cathode ray tube where the distortion of the electron beam that ordinarily occurs at the periphery of the screen is reduced. The electron gun assembly includes a cathode for emitting electrons, and a plurality of grid electrodes having a control electrode facing the cathode. The grid electrodes sequentially follow the cathode to focus and accelerate the electrons emitted from the cathode. The control electrode has a beam passage hole with a horizontal length H, and a vertical length V being larger than the horizontal length H. The ratio of the vertical to horizontal lengths satisfies the following condition: 1.03≦V/H≦1.63.
Claims12
An electron gun assembly, comprising:
- a cathode adapted to emit electrons;
- and
- a plurality of grid electrodes that includes a control electrode that is arranged to face the cathode, the grid electrodes sequentially following the cathode and being adapted to focus and accelerate the electrons emitted from the cathode, the control electrode being perforated by a beam passage hole having a horizontal length H and a vertical length V, the ratio of V/H satisfying the inequality 1.03≦V/H≦1.63.
A cathode ray tube, comprising:
- an electron gun assembly that includes a cathode, a plurality of grid electrodes that includes a control electrode arranged to face the cathode, the grid electrodes sequentially following the cathode and being adapted to focus and accelerate an electron beam emanating from the cathode, and a support adapted to serially arrange and support the grid electrodes;
- a neck internally mounted with the electron gun assembly;
- a funnel and a panel arranged to a front of the neck;
- a deflection yoke arranged around an outer circumference of the funnel and adapted to produce a magnetic field that deflects the electron beam;
- and
- a phosphor screen arranged on the inner surface of the panel, the control electrode being perforated by a beam passage hole arranged with a horizontal length H and a vertical length V, a ratio of V/H satisfying the inequality 1.03≦V/H≦1.63.
Dependencies are inferred from the claim text.