Patent ID: 6614153
Filing Date: 2003-09-02
Classification: H01J

Abstract:
A tension mask apparatus for a color picture tube, the apparatus comprising:a plurality of strips being separated a predetermined distance from each other and being parallel to each other; a plurality of real bridges connecting adjacent ones of said strips and forming slots through which electron beams pass, a quantity of said real bridges gradually decreasing from a central portion of said tension mask to a peripheral portion of said tension masks; a plurality of dummy bridges, each of said dummy bridges extending in opposite directions from adjacent ones of said strips partly into said slot separating said adjacent ones of said strips, each one of said dummy bridges comprising: a first protruding portion; and a second protruding portion, said strips including a first strip adjacent to a second strip, said first strip being separated from said second strip by a first slot, said first protruding portion extending from said first strip into said first slot in a first direction, said second protruding portion extending from said second strip into said first slot in a second direction, said first and second directions being opposite to each other, said first and second protruding portions forming a dummy slot between said first and second protruding portions, said first and second protruding portions not physically contacting each other, said dummy slot being not centrally located between said first and second strips.