Patent ID: 6806634
Filing Date: 2004-10-19
Classification: H01J

Abstract:
In a cathode ray tube comprising a panel having a fluorescent surface coated onto the inner surface, a funnel connected to the panel, a shadow mask installed with a certain interval from the fluorescent surface; and a mask frame for supporting the shadow mask, a mask frame for a cathode ray tube satisfies following equation;0.80&lE;a/(Xd/4)+b/(Yd/4)+c/(Dd/4)&lE;1.25 wherein Xd is a long side length of the mask frame, Yd is a short side length thereof, Dd is a diagonal length thereof, a is a height of the center of the long side thereof, b is a height of the center of the short side thereof, and c is a height of the corner portion thereof.