Color cathode ray tube
AssigneeLG.Philips Display Co., Ltd.
InventorsSang Yoon Park, Jong Eon Choi, Pyeong Soo Jeong
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Abstract
A color cathode ray tube in which beam landing errors caused by non-uniform thermal expansion of a shadow mask are corrected is provided such that color purity is improved. The color cathode ray tube in accordance with the present invention comprises a panel having a phosphor screen formed on an inner surface thereof, a shadow mask having a faceplate portion and a peripheral skirt portion bent back from the faceplate portion and a frame joined to the skirt portion, wherein a height of the skirt portion is less than or equal to 12 mm for substantially the entire skirt portion, and a plurality of holes are perforated at the skirt portion.
Claims26
A color cathode ray tube comprising:
- a panel having a phosphor screen formed on an inner surface thereof;
- a shadow mask having a faceplate portion and a skirt portion bent back from the faceplate portion;
- and
- a frame joined to the skirt portion of the shadow mask, wherein a height of the skirt portion is less than or equal to 12 mm for substantially the entire skirt portion and a plurality of holes are perforated at said skirt portion.
A color cathode ray tube comprising:
- a panel having a phosphor screen formed on an inner surface thereof;
- a shadow mask having a faceplate portion and a skirt portion bent back from the faceplate portion;
- and
- a frame joined to the skirt portion, wherein
- said skirt portion includes a protrusion having a welding point at which to weld said frame, and
- a ratio of a height Ho of a part of said skirt portion which is opposite to said frame and a height H of said skirt portion, i.e., Ho/H, is less than or equal to 0.8.
Dependencies are inferred from the claim text.