Flat panel for use in a cathode ray tube
View Patent ↗A flat panel for a cathode ray tube of the present invention includes a faceplate having a useful screen for displaying an image; a skirt portion which extends from a perimeter of the faceplate and has a seal edge; and a blend round portion joining the faceplate with the skirt portion, wherein when an average outer curvature radius R 1 and an average inner curvature radius R 2 of the faceplate are equal to or greater than 10,000 mm, an overall height H of the faceplate satisfies a following relationship: T 1 +10≦ H≦D ×0.12 where T 1 and D are a face center thickness of the faceplate and a diagonal length of the useful screen, respectively.
1. A flat panel for a cathode ray tube, comprising:
a faceplate having a useful screen for displaying images;
a skirt portion which extends from a perimeter of the faceplate and has a seal edge; and
a blend round portion joining the faceplate with the skirt portion,
wherein when an average outer curvature radius R 1 and an average inner curvature radius R 2 of the faceplate are equal to or greater than 10,000 mm and an overall height H of the faceplate satisfies a following relationship:
T 1 +10(mm)≦ H≦D× 0.12
where T 1 and D are a face center thickness of the faceplate and a diagonal length of the useful screen, respectively.
2. The flat panel of claim 1 , wherein the face center thickness T 1 and a seal edge thickness T 2 satisfy following relationships respectively so that the flat panel has an allowable tensile stress satisfying UL standards for implosion proof:
D× 0.02≦ T 1 ≦ D× 0.037
D× 0.014≦ T 2 ≦ D× 0.026.