Patent ID: 6388369
Filing Date: 2002-05-14
Classification: H01J

Abstract:
A tension mask assembly of a flat CRT, comprising:a tension mask, which is placed to be opposite to a phosphor screen formed at an inner surface of a panel maintaining a predetermined distance from said phosphor screen and which serves to discriminate the color of electron beams; the tension mask, which serves as an electron beam transmitting hole and which is formed at an effective surface of said tension mask having a slot or dot shape; a rail, which is supported by applying a predetermined tension to both ends of a long side part or short side part of said 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 said rail by being arranged in a direction that crosses with said rail, and a tension controlling member, which has a different rate of thermal expansion from said support bar and which is placed in a longitudinal direction against one of the side walls of said support bar.