US 6,586,869 B1Granted

Electrodes of electron gun

AssigneeSamsung SDI Co., Ltd.

InventorsIn-gyu Park, Young-kon Hong

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Abstract

Electrodes of an electron gun including a pair of first and second outer rim electrode members installed to face one another and where large diameter electron beam apertures through which three electron beams pass are respectively formed, and first and second inner electrode member installed in the outer rim electrode members, respectively, and where three small diameter electron beam apertures are formed to have an in-line shape. In the above electrodes, a burring portion is formed at the edge of the large diameter electron beam aperture of the first outer rim electrode member at one side of the outer rim electrode members facing each other, and the vertical diameter of the electron beam aperture formed in the middle of the small diameter electron beam apertures formed at the first inner electrode is formed to be greater than those of the two other small diameter electron beam apertures.

Claims18

Dependent claims

In-line electrodes of an electron gun for forming a main lens in a cathode ray tube, said cathode ray tube having a cathode for generating three electron beams, said in-line electrodes comprising:

a first focusing electrode and a second focusing electrode, said first focusing electrode comprising:
a first outer rim electrode having a first large electron beam passing aperture for passing, in common, three electron beams to said second focusing electrode;
and
a first inner electrode disposed inside said first outer rim electrode, said first inner electrode having three small electron beam passing apertures for passing corresponding ones of said three electron beams to said first large electron beam passing aperture of said first outer rim electrode;
and
said second focusing electrode comprising:
a second outer rim electrode having a second large electron beam passing aperture for passing, in common, three electron beams received from first large electron beam passing aperture of said first focusing electrode;
and
a second inner electrode disposed inside said second outer rim electrode, said second inner electrode having three small electron beam passing apertures for passing corresponding ones of said three electron beams received via said second large electron beam passing aperture of said second outer rim electrode, wherein a central one of said three small electron beam passing apertures of said first inner electrode has a diameter larger than a diameter of a central one of said three small electron beam passing apertures of said second inner electrode.

6 more elements

In-line electrodes of an electron gun for forming a main lens in a cathode ray tube, said cathode ray tube having a cathode for generating three electron beams, said in-line electrodes comprising:

a first focusing electrode and a second focusing electrode, said first focusing electrode comprising:
a first outer rim electrode having a first large electron beam passing aperture for passing, in common, three electron beams to said second focusing electrode;
and
a first inner electrode disposed inside said first outer rim electrode, said first inner electrode having three small electron beam passing apertures for passing corresponding ones of said three electron beams to said first large electron beam passing aperture of said first outer rim electrode;
and said second focusing electrode comprising:
a second outer rim electrode having a second large electron beam passing aperture for passing, in common, three electron beams received from first large electron beam passing aperture of said first focusing electrode;
and
a second inner electrode disposed inside said second outer rim electrode, said second inner electrode having three small electron beam passing apertures for passing corresponding ones of said three electron beams received via said second large electron beam passing aperture of said second outer rim electrode, wherein a central one of said three small electron beam passing apertures of said first inner electrode has a vertical diameter larger than a vertical diameter of the adjacent small electron beam passing apertures of said first inner electrode and larger than a vertical diameter of a central one of said three small electron beam passing apertures of said second inner electrode.

5 more elements

Dependencies are inferred from the claim text.