ELECTRODE FOR COLD CATHODE TUBE, AND COLD CATHODE TUBE AND LIQUID CRYSTAL DISPLAY DEVICE USING THE ELECTRODE

摘要

An electrode (1) for a cold cathode tube comprises a cylindrical side wall part (2), a bottom part (3) provided at one end of the side wall part, and an opening part (4) provided at the other end of the side wall part. The side wall part and the bottom part are formed of tungsten. This tungsten has a fibrous crystal structure extended substantially perpendicular to the thickness-wise direction of the side wall part or the bottom part. The electrode (1) satisfies the following relationship: 0.003 <= W/T <= 0.07 wherein T represents the thickness of the side wall part or bottom part; and W represents the average width of the fibrous crystal structure in its thickness-wise direction.