Color cathode ray tube
AssigneeLG. Philips Displays Korea Co., Ltd.
InventorSung Han Jung
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Abstract
A color cathode ray tube is capable of reducing a rate of cracks in a furnace and improving the productivity of the CRT by improving a structure of a seal edge of a skirt of a panel. A color cathode ray tube according to the present invention includes a rectangular panel having a substantially vertically extending skirt on inner and outer surfaces of the panel and a funnel coupled to a seal edge of the skirt of the panel. The seal edge of the skirt of the panel has a corner having a specific curvature between a seal surface and a side of the skirt, and the following relationship is satisfied: 0.6 mm<W<1.0 mm, where W is the shortest distance from a starting point on the seal surface of the corner to an extension plane of the side of the skirt.
Claims19
A color cathode ray tube comprising a rectangular panel having a substantially vertically extending skirt on inner and outer surfaces of the panel and a funnel coupled to a seal edge of the skirt of the panel,
- wherein the seal edge of the skirt of the panel has a corner having a specific curvature between a seal surface and a side of the skirt, and the following relationship is satisfied:
- 0.6 mm<W<1.0 mm,
- where W is the shortest distance from a starting point on the seal surface of the corner to an extension plane of the side of the skirt.
A color cathode ray tube comprising a rectangular panel having a substantially vertically extending skirt on inner and outer surfaces of the panel and a funnel coupled to a seal edge of the skirt of the panel,
- wherein the seal edge of the skirt of the panel has a corner having a specific curvature between a seal surface and a side of the skirt, and the following relationship is satisfied:
- 0.3 mm<H2<0.6 mm,
- where H2 is the shortest distance from a middle portion of the corner to a seal plane.
A color cathode ray tube comprising a rectangular panel having a substantially vertically extending skirt on inner and outer surfaces of the panel and a funnel coupled to a seal edge of the skirt of the panel,
- wherein the seal edge of the skirt of the panel has a corner having a specific curvature between a seal surface and a side of the skirt,
- the corner includes an inclination portion facing in the direction from the seal surface to the side of the skirt, a middle portion extending substantially parallel to the seal surface from an end portion of the inclination portion to the side of the skirt, and a curvature portion formed to have a specific curvature radius from an end portion of the middle portion to the side of the skirt,
- the curvature portion being not protruded from at least the middle portion to the seal surface, and
- the following relationship is satisfied:
- 0.1 mm<R<0.6 mm,
- where R is a curvature radius of the curvature portion.
Dependencies are inferred from the claim text.