Shadow mask for color cathode ray tube and color cathode ray tube
OwnerMizuki Muratainventor
Life of this patent
Estimating the term…
Abstract
In a shadow mask (7) for a color cathode ray tube, there are a region (23) having only dummy bridges (21), and a mixed region (24) having the dummy bridges (21) and real bridges (22). A dummy bridge size in the region (23) having only the dummy bridges (21) is greater than a dummy bridge size in the mixed region (24) having the dummy bridges (21) and the real bridges (22). The vertical size of the region (23) having only the dummy bridges (21) is greater than 50 percent of the vertical size of the shadow mask.
Claims6
A shadow mask for a color cathode ray tube, comprising:
- a plurality of strips;
- real bridges for connecting said strips adjacent to each other;
- and
- dummy bridges formed in cantilevered fashion on a side part of said strips,
- wherein a region in which only said dummy bridges are present among said dummy bridges and said real bridges is defined as a first region, and a mixed region having said dummy bridges and said real bridges is defined as a second region, and
- wherein the size of said dummy bridges in said first region is greater than the size of said dummy bridges in said second region.
A shadow mask for a color cathode ray tube, comprising
- a plurality of strips;
- and
- real bridges for connecting said strips adjacent to each other,
- wherein a striped mask region devoid of said real bridges is defined as a first region, and a region having said real bridges is defined as a second region, and
- wherein a slit opening width in said first region is less than a slit opening width in said second region.
A color cathode ray tube comprising:
- a glass tube body having a faceplate panel;
- and
- a shadow mask provided inside said faceplate panel,
- said shadow mask including
- a plurality of strips,
- real bridges for connecting said strips adjacent to each other, and
- dummy bridges formed in cantilevered fashion on a side part of said strips,
- wherein a region in which only said dummy bridges are present among said dummy bridges and said real bridges is defined as a first region, and a mixed region having said dummy bridges and said real bridges is defined as a second region, and
- wherein the size of said dummy bridges in said first region is greater than the size of said dummy bridges in said second region.
A color cathode ray tube comprising:
- a glass tube body having a faceplate panel;
- and
- a shadow mask provided inside said faceplate panel,
- said shadow mask including
- a plurality of strips, and
- real bridges for connecting said strips adjacent to each other,
- wherein a striped mask region devoid of said real bridges is defined as a first region, and a region having said real bridges is defined as a second region, and
- wherein a slit opening width in said first region is less than a slit opening width in said second region.
Dependencies are inferred from the claim text.