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US 2004/0095053 A1Published application
Shadow mask structure for cathode ray tube
AssigneeLG. Philips Displays Korea Co., Ltd.
InventorSung Hun Kim
Life of this patent
Estimating the term…
Abstract
The present invention relates to a cathode ray tube, and more particularly to a cathode ray tube having a shadow mask for obviating doming phenomenon caused by thermal expansion and deterioration of color purity.
Claims26
A cathode ray tube comprising:
- a glass panel having a front side;
- a funnel attached to the glass panel forming a vacuum envelope;
- a fluorescent screen formed on an inside surface of the glass panel;
- a shadow mask having a skirt being spaced from the fluorescent screen by a distance, the shadow mask having a short side and a long side;
- a mask frame coupled to the shadow mask;
- an electron gun at a neck portion of the funnel;
- and
- a deflection yoke for deflecting electron beams emitted from the electron gun in horizontal and vertical directions, wherein a ratio (%) of a length of the skirt (S) to a length of the long side (X) of the shadow mask is in a range of about 4.1%≦S/X ≦5.2%.
5 more elements
A cathode ray tube comprising:
- a glass panel having a front side;
- a funnel attached to the glass panel forming a vacuum envelope;
- a fluorescent screen formed on an inside surface of the glass panel;
- a shadow mask having a skirt being spaced from the fluorescent screen by a distance, the shadow mask having a short side and a long side;
- a mask frame coupled to the shadow mask;
- an electron gun at a neck portion of the funnel;
- and
- a deflection yoke for deflecting electron beams emitted from the electron gun in horizontal and vertical directions, wherein a ratio (%) of a length of the skirt (S) to a length of the long side (Y) of the shadow mask is in a range of about 5.4%≦S/Y≦6.8%.
5 more elements
A cathode ray tube comprising:
- a glass panel having a front side;
- a funnel attached to the glass panel forming a vacuum envelope;
- a fluorescent screen formed on an inside surface of the glass panel;
- a shadow mask with a color selection function and having a skirt with a welding portion, the shadow mask being spaced from the fluorescent screen by a distance and having a short side and a long side, wherein a height of the skirt on the long side of the shadow mask, XS, and a height of the skirt on the short side of the shadow mask, YS, satisfy a relation of XS≦YS;
- a mask frame in the shadow mask, wherein the mask frame is welded to the shadow mask and the welding portion of the skirt of the shadow mask for welding the mask frame to the shadow mask is formed within a distance of 3 mm from an end of the skirt;
- an electron gun at a neck portion of the funnel;
- and
- a deflection yoke for deflecting electron beams emitted from the electron gun in horizontal and vertical directions, wherein a ratio (%) of a length of the skirt (S) to a length of the long side (X) of the shadow mask is 4.1%≦S/X≦5.2%;
- wherein a ratio (%) of the length of a skirt (S) to a length of the short side (Y) of the shadow mask is 5.4%≦S/Y≦6.8%.
6 more elements
A cathode ray tube comprising:
- a glass panel having a front side;
- a funnel attached to the glass panel forming a vacuum envelope;
- a fluorescent screen formed on an inside surface of the glass panel;
- a shadow mask having a skirt being spaced from the fluorescent screen by a distance, the shadow mask having a short side and a long side;
- a mask frame coupled to the shadow mask;
- an electron gun at a neck portion of the funnel;
- and
- means for deflecting electron beams emitted from the electron gun in horizontal and vertical directions, wherein a ratio (%) of a length of the skirt (S) to a length of the long side (X) of the shadow mask is in a range of about 4.1%≦S/X≦5.2%.
5 more elements
A cathode ray tube comprising:
- a glass panel having a front side;
- a funnel attached to the glass panel forming a vacuum envelope;
- a fluorescent screen formed on an inside surface of the glass panel;
- a shadow mask having a skirt being spaced from the fluorescent screen by a distance, the shadow mask having a short side and a long side;
- a mask frame coupled to the shadow mask;
- an electron gun at a neck portion of the funnel;
- and
- means for deflecting electron beams emitted from the electron gun in horizontal and vertical directions, wherein a ratio (%) of a length of the skirt (S) to a length of the long side (Y) of the shadow mask is in a range of about 5.4%≦S/Y≦6.8%.
5 more elements
Dependencies are inferred from the claim text.