Tension mask assembly of a flat CRT having a tension controlling member on a side wall of a support bar

A tension mask assembly of a flat CRT, comprising:

• a tension mask, which is disposed opposite to a phosphor screen formed at an inner surface of a panel at a predetermined distance from the phosphor screen, and which serves to discriminate a color of electron beams;
• the tension mask having an aperture grill, which serves as an electron beam transmitting hole and which is formed on an effective surface of the tension mask having a slot or dot shape;
• a tail, which is supported by the application of a predetermined tension to side ends of long sides or short sides of the tension mask;
• a support bar having a top wall disposed adjacent to said tension mask, a bottom wall disposed opposite to said tension mask, and side walls, which support both ends of the rail, arranged so as to cross the rail;
• and
• a tension controlling member having a different rate of thermal expansion than the support bar, wherein the tension controlling member is arranged against one of the side walls of the support bar.

A tension mask assembly of a flat CRT, comprising:

• a tension mask, which is disposed opposite to a phosphor screen formed at an inner surface of a panel at a predetermined distance from the phosphor screen, and which serves to discriminate a color of electron beams;
• the tension mask having an aperture grill, which serves as an electron beam transmitting hole formed on a surface of the tension mask;
• a tail, which is supported by the application of a predetermined tension to side ends of long sides or short sides of the tension mask;
• a support bar having a top wall disposed adjacent to said tension mask, a bottom wall disposed opposite to said tension mask, and side walls, which supports both ends of the rail, arranged so as to cross the rail;
• and
• a tension controlling member having a different rate of thermal expansion than the support bar, wherein the tension controlling member is arranged against one of the side walls of the support bar.