Patent ID: 7084560

Claim:
A tension mask frame assembly for a color cathode ray tube, the assembly comprising a frame and a tension mask; wherein said frame comprises: first and second support members separated by a predetermined distance; first and second elastic members installed between said first and second support members for supporting said first and second support members, said elastic members comprising a first material having a first thermal expansion coefficient; first and second securing units, said first securing unit being installed on said first support member and including a first holder and a first spring fixed to said first holder, said second securing unit being installed on said second support member and including a second holder and a second spring fixed to said second holder; and third and fourth securing units, said third securing unit being installed on said first elastic member and including a third holder and a third spring fixed to said third holder, said fourth securing unit being installed on said second elastic member and including a fourth holder and a fourth spring fixed to said fourth holder, said third and fourth holders comprising a second material having a second thermal expansion coefficient, the second thermal expansion coefficient being selected from a coefficient that is less than the first thermal expansion coefficient and a coefficient that is equal to the first thermal expansion coefficient; wherein said tension mask is installed to apply tension to said support members, said tension mask forming a plurality of electron beam passing holes; and wherein said first and second holders comprise a third material having a third thermal expansion coefficient, the second thermal expansion coefficient being less than the third thermal expansion coefficient.