Shadow mask in color cathode ray tube
AssigneeLG Electronics Inc.
InventorSoo Kil Park
Life of this patent
Estimating the term…
Abstract
A shadow mask for a color cathode ray tube provided which includes an effective surface part having a plurality of slots formed therein for passing electron beams, and an edge part extended from the effective surface part and welded to a frame fitted to a panel in a cathode ray tube. The shadow mask is tensed in any one of an x- and y-axis directions. An interval of welding spots on the edge part is fixed according to a thickness of the shadow mask and a pitch of slots of the shadow mask. The interval of welding spots is in a range of approximately 11 to 15 times the thickness of the shadow mask. The welding spots on the edge part has an aspect ratio in a range of approximately 1.0 to 2.6.
Claims20
A shadow mask in a color cathode ray tube, comprising:
- an effective surface part comprising a plurality of slots formed therein for passing electron beams;
- and an edge part extended from the effective surface part and welded to a frame fitted to a panel in a cathode ray tube, wherein the shadow mask is tensed in any one of x- and y-axis directions, wherein an interval of welding spots on the edge part is fixed according to a thickness of the shadow mask and a pitch of slots of the shadow mask, and wherein the interval of the welding spots is in a range of 11 to 17 times the thickness of the shadow mask.
A shadow mask in a color cathode ray tube, comprising:
- an effective surface part comprising a plurality of slots for passing electron beams;
- and
- an edge part extended from the effective surface part and welded to a frame fitted to a panel in a cathode ray tube, wherein the shadow mask is tensed in any one of x- and y-axis directions, wherein an interval of welding spots on the edge part is fixed according to a thickness of the shadow mask and a pitch of the slots in the shadow mask, and wherein the interval of the welding spots is in a range about 0.5-1.9 times the slot pitch of the shadow mask.
A shadow mask in a color cathode ray tube, comprising:
- an effective surface part comprising a plurality of slots for passing electron beams;
- and
- an edge part extended from the effective surface part and welded to a frame fitted to a panel in a cathode ray tube, wherein the shadow mask is tensed in any one of x- and y-axis directions, wherein an interval of welding spots on the edge part is fixed according to a thickness of the shadow mask and a pitch of slots of the shadow mask, and wherein each welding spot has an aspect ratio in a range of about 1.0-2.6.
A shadow mask and frame assembly, comprising:
- a shadow mask;
- a frame;
- and a spot welds attaching the shadow mask to the frame, wherein at least one parameter of the spot welds is configured in accordance with at least one of a thickness, a slot pitch of the shadow mask, or a combination thereof to prevent wrinkles in the shadow mask, wherein an interval between spot welds is 11 to 17 times the thickness of the shadow mask.
Dependencies are inferred from the claim text.