Patent ID: 6781298
Filing Date: 2004-08-24
Classification: H01J

Abstract:
A Cathode Ray Tube (CRT), comprising:a panel on which a fluorescent surface is installed; a funnel which is fused to a rear side of the panel using frit glass; a shadow mask having an electron beam through hole provided adjacent to an inner side surface of the panel to sort the color of the electron beam; and a mask assembly configured to support the shadow mask and comprising a main frame for supporting the shadow mask and a sub frame for supporting the main frame, wherein the CRT satisfies the following equation: 0.40&lE;Ls/Lb&lE;0.55 where Lb is a minimum distance between a flat surface extended from an upper surface of the main frame and a flat surface extended from a lower surface of the sub frame before the shadow mask is attached to the mask assembly and Ls is a height of the sub frame.