Patent ID: 6853121

Claim:
A mask frame assembly for applying optimal tension in a cathode ray tube, comprising: a shadow mask for selecting color; a frame assembly including a main frame for optimizing distribution of tension applied to said shadow mask such that a range of vibration of said shadow mask is decreased; and a sub-frame for supporting the main frame, wherein the mainframe has a plurality of compression point portion thereof, the locations of each of said compression points being identified by the following expressions, (L/2)×0.38≦X1≦(L/2)×0.52, and (L/2)×0.80≦X2≦(L/2)×0.98, where L is a length of a long side of the main frame, X1 and X2 are distances from the center of the main frame to each of compression points P 1 and P 2 in both sides.